fix bug in verify_write_callback_ where the FIFO dequeueing did not memmove all the...
[flac.git] / src / libFLAC / stream_encoder.c
1 /* libFLAC - Free Lossless Audio Codec library
2  * Copyright (C) 2000,2001,2002,2003,2004,2005,2006  Josh Coalson
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  *
8  * - Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *
11  * - Redistributions in binary form must reproduce the above copyright
12  * notice, this list of conditions and the following disclaimer in the
13  * documentation and/or other materials provided with the distribution.
14  *
15  * - Neither the name of the Xiph.org Foundation nor the names of its
16  * contributors may be used to endorse or promote products derived from
17  * this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22  * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30  */
31
32 #if HAVE_CONFIG_H
33 #  include <config.h>
34 #endif
35
36 #if defined _MSC_VER || defined __MINGW32__
37 #include <io.h> /* for _setmode() */
38 #include <fcntl.h> /* for _O_BINARY */
39 #endif
40 #if defined __CYGWIN__ || defined __EMX__
41 #include <io.h> /* for setmode(), O_BINARY */
42 #include <fcntl.h> /* for _O_BINARY */
43 #endif
44 #include <limits.h>
45 #include <stdio.h>
46 #include <stdlib.h> /* for malloc() */
47 #include <string.h> /* for memcpy() */
48 #include <sys/types.h> /* for off_t */
49 #if defined _MSC_VER || defined __MINGW32__
50 #if _MSC_VER <= 1200 /* @@@ [2G limit] */
51 #define fseeko fseek
52 #define ftello ftell
53 #endif
54 #endif
55 #include "FLAC/assert.h"
56 #include "FLAC/stream_decoder.h"
57 #include "protected/stream_encoder.h"
58 #include "private/bitbuffer.h"
59 #include "private/bitmath.h"
60 #include "private/crc.h"
61 #include "private/cpu.h"
62 #include "private/fixed.h"
63 #include "private/format.h"
64 #include "private/lpc.h"
65 #include "private/md5.h"
66 #include "private/memory.h"
67 #ifdef FLAC__HAS_OGG
68 #include "private/ogg_helper.h"
69 #endif
70 #include "private/stream_encoder_framing.h"
71 #include "private/window.h"
72
73 #ifdef min
74 #undef min
75 #endif
76 #define min(x,y) ((x)<(y)?(x):(y))
77
78 #ifdef max
79 #undef max
80 #endif
81 #define max(x,y) ((x)>(y)?(x):(y))
82
83 typedef struct {
84         FLAC__int32 *data[FLAC__MAX_CHANNELS];
85         unsigned size; /* of each data[] in samples */
86         unsigned tail;
87 } verify_input_fifo;
88
89 typedef struct {
90         const FLAC__byte *data;
91         unsigned capacity;
92         unsigned bytes;
93 } verify_output;
94
95 typedef enum {
96         ENCODER_IN_MAGIC = 0,
97         ENCODER_IN_METADATA = 1,
98         ENCODER_IN_AUDIO = 2
99 } EncoderStateHint;
100
101 static struct CompressionLevels {
102         FLAC__bool do_mid_side_stereo;
103         FLAC__bool loose_mid_side_stereo;
104         const char *apodization;
105         unsigned max_lpc_order;
106         unsigned qlp_coeff_precision;
107         FLAC__bool do_qlp_coeff_prec_search;
108         FLAC__bool do_escape_coding;
109         FLAC__bool do_exhaustive_model_search;
110         unsigned min_residual_partition_order;
111         unsigned max_residual_partition_order;
112         unsigned rice_parameter_search_dist;
113 } compression_levels_[] = {
114         { false, false, "tukey(0.5)",  0, 0, false, false, false, 2, 2, 0 },
115         { true , true , "tukey(0.5)",  0, 0, false, false, false, 2, 2, 0 },
116         { true , false, "tukey(0.5)",  0, 0, false, false, false, 0, 3, 0 },
117         { false, false, "tukey(0.5)",  6, 0, false, false, false, 3, 3, 0 },
118         { true , true , "tukey(0.5)",  8, 0, false, false, false, 3, 3, 0 },
119         { true , false, "tukey(0.5)",  8, 0, false, false, false, 3, 3, 0 },
120         { true , false, "tukey(0.5)",  8, 0, false, false, false, 0, 4, 0 },
121         { true , false, "tukey(0.5)",  8, 0, false, false, true , 0, 6, 0 },
122         { true , false, "tukey(0.5)", 12, 0, false, false, true , 0, 6, 0 }
123 };
124
125
126 /***********************************************************************
127  *
128  * Private class method prototypes
129  *
130  ***********************************************************************/
131
132 static void set_defaults_(FLAC__StreamEncoder *encoder);
133 static void free_(FLAC__StreamEncoder *encoder);
134 static FLAC__bool resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_blocksize);
135 static FLAC__bool write_bitbuffer_(FLAC__StreamEncoder *encoder, unsigned samples);
136 static FLAC__StreamEncoderWriteStatus write_frame_(FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples);
137 static void update_metadata_(const FLAC__StreamEncoder *encoder);
138 #if FLAC__HAS_OGG
139 static void update_ogg_metadata_(FLAC__StreamEncoder *encoder);
140 #endif
141 static FLAC__bool process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block);
142 static FLAC__bool process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block);
143
144 static FLAC__bool process_subframe_(
145         FLAC__StreamEncoder *encoder,
146         unsigned min_partition_order,
147         unsigned max_partition_order,
148         FLAC__bool precompute_partition_sums,
149         const FLAC__FrameHeader *frame_header,
150         unsigned subframe_bps,
151         const FLAC__int32 integer_signal[],
152 #ifndef FLAC__INTEGER_ONLY_LIBRARY
153         const FLAC__real real_signal[],
154 #endif
155         FLAC__Subframe *subframe[2],
156         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents[2],
157         FLAC__int32 *residual[2],
158         unsigned *best_subframe,
159         unsigned *best_bits
160 );
161
162 static FLAC__bool add_subframe_(
163         FLAC__StreamEncoder *encoder,
164         const FLAC__FrameHeader *frame_header,
165         unsigned subframe_bps,
166         const FLAC__Subframe *subframe,
167         FLAC__BitBuffer *frame
168 );
169
170 static unsigned evaluate_constant_subframe_(
171         const FLAC__int32 signal,
172         unsigned subframe_bps,
173         FLAC__Subframe *subframe
174 );
175
176 static unsigned evaluate_fixed_subframe_(
177         FLAC__StreamEncoder *encoder,
178         const FLAC__int32 signal[],
179         FLAC__int32 residual[],
180         FLAC__uint32 abs_residual[],
181         FLAC__uint64 abs_residual_partition_sums[],
182         unsigned raw_bits_per_partition[],
183         unsigned blocksize,
184         unsigned subframe_bps,
185         unsigned order,
186         unsigned rice_parameter,
187         unsigned min_partition_order,
188         unsigned max_partition_order,
189         FLAC__bool precompute_partition_sums,
190         FLAC__bool do_escape_coding,
191         unsigned rice_parameter_search_dist,
192         FLAC__Subframe *subframe,
193         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
194 );
195
196 #ifndef FLAC__INTEGER_ONLY_LIBRARY
197 static unsigned evaluate_lpc_subframe_(
198         FLAC__StreamEncoder *encoder,
199         const FLAC__int32 signal[],
200         FLAC__int32 residual[],
201         FLAC__uint32 abs_residual[],
202         FLAC__uint64 abs_residual_partition_sums[],
203         unsigned raw_bits_per_partition[],
204         const FLAC__real lp_coeff[],
205         unsigned blocksize,
206         unsigned subframe_bps,
207         unsigned order,
208         unsigned qlp_coeff_precision,
209         unsigned rice_parameter,
210         unsigned min_partition_order,
211         unsigned max_partition_order,
212         FLAC__bool precompute_partition_sums,
213         FLAC__bool do_escape_coding,
214         unsigned rice_parameter_search_dist,
215         FLAC__Subframe *subframe,
216         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents
217 );
218 #endif
219
220 static unsigned evaluate_verbatim_subframe_(
221         const FLAC__int32 signal[],
222         unsigned blocksize,
223         unsigned subframe_bps,
224         FLAC__Subframe *subframe
225 );
226
227 static unsigned find_best_partition_order_(
228         struct FLAC__StreamEncoderPrivate *private_,
229         const FLAC__int32 residual[],
230         FLAC__uint32 abs_residual[],
231         FLAC__uint64 abs_residual_partition_sums[],
232         unsigned raw_bits_per_partition[],
233         unsigned residual_samples,
234         unsigned predictor_order,
235         unsigned rice_parameter,
236         unsigned min_partition_order,
237         unsigned max_partition_order,
238         FLAC__bool precompute_partition_sums,
239         FLAC__bool do_escape_coding,
240         unsigned rice_parameter_search_dist,
241         FLAC__EntropyCodingMethod_PartitionedRice *best_partitioned_rice
242 );
243
244 static void precompute_partition_info_sums_(
245         const FLAC__uint32 abs_residual[],
246         FLAC__uint64 abs_residual_partition_sums[],
247         unsigned residual_samples,
248         unsigned predictor_order,
249         unsigned min_partition_order,
250         unsigned max_partition_order
251 );
252
253 static void precompute_partition_info_escapes_(
254         const FLAC__int32 residual[],
255         unsigned raw_bits_per_partition[],
256         unsigned residual_samples,
257         unsigned predictor_order,
258         unsigned min_partition_order,
259         unsigned max_partition_order
260 );
261
262 #ifdef DONT_ESTIMATE_RICE_BITS
263 static FLAC__bool set_partitioned_rice_(
264         const FLAC__uint32 abs_residual[],
265         const FLAC__int32 residual[],
266         const unsigned residual_samples,
267         const unsigned predictor_order,
268         const unsigned suggested_rice_parameter,
269         const unsigned rice_parameter_search_dist,
270         const unsigned partition_order,
271         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
272         unsigned *bits
273 );
274
275 static FLAC__bool set_partitioned_rice_with_precompute_(
276         const FLAC__int32 residual[],
277         const FLAC__uint64 abs_residual_partition_sums[],
278         const unsigned raw_bits_per_partition[],
279         const unsigned residual_samples,
280         const unsigned predictor_order,
281         const unsigned suggested_rice_parameter,
282         const unsigned rice_parameter_search_dist,
283         const unsigned partition_order,
284         const FLAC__bool search_for_escapes,
285         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
286         unsigned *bits
287 );
288 #else
289 static FLAC__bool set_partitioned_rice_(
290         const FLAC__uint32 abs_residual[],
291         const unsigned residual_samples,
292         const unsigned predictor_order,
293         const unsigned suggested_rice_parameter,
294         const unsigned rice_parameter_search_dist,
295         const unsigned partition_order,
296         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
297         unsigned *bits
298 );
299
300 static FLAC__bool set_partitioned_rice_with_precompute_(
301         const FLAC__uint32 abs_residual[],
302         const FLAC__uint64 abs_residual_partition_sums[],
303         const unsigned raw_bits_per_partition[],
304         const unsigned residual_samples,
305         const unsigned predictor_order,
306         const unsigned suggested_rice_parameter,
307         const unsigned rice_parameter_search_dist,
308         const unsigned partition_order,
309         const FLAC__bool search_for_escapes,
310         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents,
311         unsigned *bits
312 );
313 #endif
314
315 static unsigned get_wasted_bits_(FLAC__int32 signal[], unsigned samples);
316
317 /* verify-related routines: */
318 static void append_to_verify_fifo_(
319         verify_input_fifo *fifo,
320         const FLAC__int32 * const input[],
321         unsigned input_offset,
322         unsigned channels,
323         unsigned wide_samples
324 );
325
326 static void append_to_verify_fifo_interleaved_(
327         verify_input_fifo *fifo,
328         const FLAC__int32 input[],
329         unsigned input_offset,
330         unsigned channels,
331         unsigned wide_samples
332 );
333
334 static FLAC__StreamDecoderReadStatus verify_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
335 static FLAC__StreamDecoderWriteStatus verify_write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data);
336 static void verify_metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data);
337 static void verify_error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
338
339 static FLAC__StreamEncoderReadStatus file_read_callback_(const FLAC__StreamEncoder *encoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
340 static FLAC__StreamEncoderSeekStatus file_seek_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data);
341 static FLAC__StreamEncoderTellStatus file_tell_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
342 static FLAC__StreamEncoderWriteStatus file_write_callback_(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame, void *client_data);
343 static FILE *get_binary_stdout_();
344
345
346 /***********************************************************************
347  *
348  * Private class data
349  *
350  ***********************************************************************/
351
352 typedef struct FLAC__StreamEncoderPrivate {
353         unsigned input_capacity;                          /* current size (in samples) of the signal and residual buffers */
354         FLAC__int32 *integer_signal[FLAC__MAX_CHANNELS];  /* the integer version of the input signal */
355         FLAC__int32 *integer_signal_mid_side[2];          /* the integer version of the mid-side input signal (stereo only) */
356 #ifndef FLAC__INTEGER_ONLY_LIBRARY
357         FLAC__real *real_signal[FLAC__MAX_CHANNELS];      /* the floating-point version of the input signal */
358         FLAC__real *real_signal_mid_side[2];              /* the floating-point version of the mid-side input signal (stereo only) */
359         FLAC__real *window[FLAC__MAX_APODIZATION_FUNCTIONS]; /* the pre-computed floating-point window for each apodization function */
360         FLAC__real *windowed_signal;                      /* the real_signal[] * current window[] */
361 #endif
362         unsigned subframe_bps[FLAC__MAX_CHANNELS];        /* the effective bits per sample of the input signal (stream bps - wasted bits) */
363         unsigned subframe_bps_mid_side[2];                /* the effective bits per sample of the mid-side input signal (stream bps - wasted bits + 0/1) */
364         FLAC__int32 *residual_workspace[FLAC__MAX_CHANNELS][2]; /* each channel has a candidate and best workspace where the subframe residual signals will be stored */
365         FLAC__int32 *residual_workspace_mid_side[2][2];
366         FLAC__Subframe subframe_workspace[FLAC__MAX_CHANNELS][2];
367         FLAC__Subframe subframe_workspace_mid_side[2][2];
368         FLAC__Subframe *subframe_workspace_ptr[FLAC__MAX_CHANNELS][2];
369         FLAC__Subframe *subframe_workspace_ptr_mid_side[2][2];
370         FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_workspace[FLAC__MAX_CHANNELS][2];
371         FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_workspace_mid_side[FLAC__MAX_CHANNELS][2];
372         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents_workspace_ptr[FLAC__MAX_CHANNELS][2];
373         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents_workspace_ptr_mid_side[FLAC__MAX_CHANNELS][2];
374         unsigned best_subframe[FLAC__MAX_CHANNELS];       /* index into the above workspaces */
375         unsigned best_subframe_mid_side[2];
376         unsigned best_subframe_bits[FLAC__MAX_CHANNELS];  /* size in bits of the best subframe for each channel */
377         unsigned best_subframe_bits_mid_side[2];
378         FLAC__uint32 *abs_residual;                       /* workspace where abs(candidate residual) is stored */
379         FLAC__uint64 *abs_residual_partition_sums;        /* workspace where the sum of abs(candidate residual) for each partition is stored */
380         unsigned *raw_bits_per_partition;                 /* workspace where the sum of silog2(candidate residual) for each partition is stored */
381         FLAC__BitBuffer *frame;                           /* the current frame being worked on */
382         unsigned loose_mid_side_stereo_frames;            /* rounded number of frames the encoder will use before trying both independent and mid/side frames again */
383         unsigned loose_mid_side_stereo_frame_count;       /* number of frames using the current channel assignment */
384         FLAC__ChannelAssignment last_channel_assignment;
385         FLAC__StreamMetadata streaminfo;                  /* scratchpad for STREAMINFO as it is built */
386         FLAC__StreamMetadata_SeekTable *seek_table;       /* pointer into encoder->protected_->metadata_ where the seek table is */
387         unsigned current_sample_number;
388         unsigned current_frame_number;
389         struct FLAC__MD5Context md5context;
390         FLAC__CPUInfo cpuinfo;
391 #ifndef FLAC__INTEGER_ONLY_LIBRARY
392         unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]);
393 #else
394         unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__fixedpoint residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]);
395 #endif
396 #ifndef FLAC__INTEGER_ONLY_LIBRARY
397         void (*local_lpc_compute_autocorrelation)(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]);
398         void (*local_lpc_compute_residual_from_qlp_coefficients)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]);
399         void (*local_lpc_compute_residual_from_qlp_coefficients_64bit)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]);
400         void (*local_lpc_compute_residual_from_qlp_coefficients_16bit)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]);
401 #endif
402         FLAC__bool use_wide_by_block;          /* use slow 64-bit versions of some functions because of the block size */
403         FLAC__bool use_wide_by_partition;      /* use slow 64-bit versions of some functions because of the min partition order and blocksize */
404         FLAC__bool use_wide_by_order;          /* use slow 64-bit versions of some functions because of the lpc order */
405         FLAC__bool precompute_partition_sums;  /* our initial guess as to whether precomputing the partitions sums will be a speed improvement */
406         FLAC__bool disable_constant_subframes;
407         FLAC__bool disable_fixed_subframes;
408         FLAC__bool disable_verbatim_subframes;
409 #if FLAC__HAS_OGG
410         FLAC__bool is_ogg;
411 #endif
412         FLAC__StreamEncoderReadCallback read_callback; /* currently only needed for Ogg FLAC */
413         FLAC__StreamEncoderSeekCallback seek_callback;
414         FLAC__StreamEncoderTellCallback tell_callback;
415         FLAC__StreamEncoderWriteCallback write_callback;
416         FLAC__StreamEncoderMetadataCallback metadata_callback;
417         FLAC__StreamEncoderProgressCallback progress_callback;
418         void *client_data;
419         unsigned first_seekpoint_to_check;
420         FILE *file;                            /* only used when encoding to a file */
421         FLAC__uint64 bytes_written;
422         FLAC__uint64 samples_written;
423         unsigned frames_written;
424         unsigned total_frames_estimate;
425         /* unaligned (original) pointers to allocated data */
426         FLAC__int32 *integer_signal_unaligned[FLAC__MAX_CHANNELS];
427         FLAC__int32 *integer_signal_mid_side_unaligned[2];
428 #ifndef FLAC__INTEGER_ONLY_LIBRARY
429         FLAC__real *real_signal_unaligned[FLAC__MAX_CHANNELS];
430         FLAC__real *real_signal_mid_side_unaligned[2];
431         FLAC__real *window_unaligned[FLAC__MAX_APODIZATION_FUNCTIONS];
432         FLAC__real *windowed_signal_unaligned;
433 #endif
434         FLAC__int32 *residual_workspace_unaligned[FLAC__MAX_CHANNELS][2];
435         FLAC__int32 *residual_workspace_mid_side_unaligned[2][2];
436         FLAC__uint32 *abs_residual_unaligned;
437         FLAC__uint64 *abs_residual_partition_sums_unaligned;
438         unsigned *raw_bits_per_partition_unaligned;
439         /*
440          * These fields have been moved here from private function local
441          * declarations merely to save stack space during encoding.
442          */
443 #ifndef FLAC__INTEGER_ONLY_LIBRARY
444         FLAC__real lp_coeff[FLAC__MAX_LPC_ORDER][FLAC__MAX_LPC_ORDER]; /* from process_subframe_() */
445 #endif
446         FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_extra[2]; /* from find_best_partition_order_() */
447         /*
448          * The data for the verify section
449          */
450         struct {
451                 FLAC__StreamDecoder *decoder;
452                 EncoderStateHint state_hint;
453                 FLAC__bool needs_magic_hack;
454                 verify_input_fifo input_fifo;
455                 verify_output output;
456                 struct {
457                         FLAC__uint64 absolute_sample;
458                         unsigned frame_number;
459                         unsigned channel;
460                         unsigned sample;
461                         FLAC__int32 expected;
462                         FLAC__int32 got;
463                 } error_stats;
464         } verify;
465         FLAC__bool is_being_deleted; /* if true, call to ..._finish() from ..._delete() will not call the callbacks */
466 } FLAC__StreamEncoderPrivate;
467
468 /***********************************************************************
469  *
470  * Public static class data
471  *
472  ***********************************************************************/
473
474 FLAC_API const char * const FLAC__StreamEncoderStateString[] = {
475         "FLAC__STREAM_ENCODER_OK",
476         "FLAC__STREAM_ENCODER_UNINITIALIZED",
477         "FLAC__STREAM_ENCODER_OGG_ERROR",
478         "FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR",
479         "FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA",
480         "FLAC__STREAM_ENCODER_CLIENT_ERROR",
481         "FLAC__STREAM_ENCODER_IO_ERROR",
482         "FLAC__STREAM_ENCODER_FRAMING_ERROR",
483         "FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR"
484 };
485
486 FLAC_API const char * const FLAC__StreamEncoderInitStatusString[] = {
487         "FLAC__STREAM_ENCODER_INIT_STATUS_OK",
488         "FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR",
489         "FLAC__STREAM_ENCODER_INIT_STATUS_UNSUPPORTED_CONTAINER",
490         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_CALLBACKS",
491         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_NUMBER_OF_CHANNELS",
492         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BITS_PER_SAMPLE",
493         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_SAMPLE_RATE",
494         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BLOCK_SIZE",
495         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_MAX_LPC_ORDER",
496         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_QLP_COEFF_PRECISION",
497         "FLAC__STREAM_ENCODER_INIT_STATUS_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER",
498         "FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE",
499         "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA",
500         "FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED"
501 };
502
503 FLAC_API const char * const FLAC__treamEncoderReadStatusString[] = {
504         "FLAC__STREAM_ENCODER_READ_STATUS_CONTINUE",
505         "FLAC__STREAM_ENCODER_READ_STATUS_END_OF_STREAM",
506         "FLAC__STREAM_ENCODER_READ_STATUS_ABORT",
507         "FLAC__STREAM_ENCODER_READ_STATUS_UNSUPPORTED"
508 };
509
510 FLAC_API const char * const FLAC__StreamEncoderWriteStatusString[] = {
511         "FLAC__STREAM_ENCODER_WRITE_STATUS_OK",
512         "FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR"
513 };
514
515 FLAC_API const char * const FLAC__StreamEncoderSeekStatusString[] = {
516         "FLAC__STREAM_ENCODER_SEEK_STATUS_OK",
517         "FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR",
518         "FLAC__STREAM_ENCODER_SEEK_STATUS_UNSUPPORTED"
519 };
520
521 FLAC_API const char * const FLAC__StreamEncoderTellStatusString[] = {
522         "FLAC__STREAM_ENCODER_TELL_STATUS_OK",
523         "FLAC__STREAM_ENCODER_TELL_STATUS_ERROR",
524         "FLAC__STREAM_ENCODER_TELL_STATUS_UNSUPPORTED"
525 };
526
527 /***********************************************************************
528  *
529  * Class constructor/destructor
530  *
531  */
532 FLAC_API FLAC__StreamEncoder *FLAC__stream_encoder_new()
533 {
534         FLAC__StreamEncoder *encoder;
535         unsigned i;
536
537         FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */
538
539         encoder = (FLAC__StreamEncoder*)calloc(1, sizeof(FLAC__StreamEncoder));
540         if(encoder == 0) {
541                 return 0;
542         }
543
544         encoder->protected_ = (FLAC__StreamEncoderProtected*)calloc(1, sizeof(FLAC__StreamEncoderProtected));
545         if(encoder->protected_ == 0) {
546                 free(encoder);
547                 return 0;
548         }
549
550         encoder->private_ = (FLAC__StreamEncoderPrivate*)calloc(1, sizeof(FLAC__StreamEncoderPrivate));
551         if(encoder->private_ == 0) {
552                 free(encoder->protected_);
553                 free(encoder);
554                 return 0;
555         }
556
557         encoder->private_->frame = FLAC__bitbuffer_new();
558         if(encoder->private_->frame == 0) {
559                 free(encoder->private_);
560                 free(encoder->protected_);
561                 free(encoder);
562                 return 0;
563         }
564
565         encoder->private_->file = 0;
566
567         set_defaults_(encoder);
568
569         encoder->private_->is_being_deleted = false;
570
571         for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
572                 encoder->private_->subframe_workspace_ptr[i][0] = &encoder->private_->subframe_workspace[i][0];
573                 encoder->private_->subframe_workspace_ptr[i][1] = &encoder->private_->subframe_workspace[i][1];
574         }
575         for(i = 0; i < 2; i++) {
576                 encoder->private_->subframe_workspace_ptr_mid_side[i][0] = &encoder->private_->subframe_workspace_mid_side[i][0];
577                 encoder->private_->subframe_workspace_ptr_mid_side[i][1] = &encoder->private_->subframe_workspace_mid_side[i][1];
578         }
579         for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
580                 encoder->private_->partitioned_rice_contents_workspace_ptr[i][0] = &encoder->private_->partitioned_rice_contents_workspace[i][0];
581                 encoder->private_->partitioned_rice_contents_workspace_ptr[i][1] = &encoder->private_->partitioned_rice_contents_workspace[i][1];
582         }
583         for(i = 0; i < 2; i++) {
584                 encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[i][0] = &encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0];
585                 encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[i][1] = &encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1];
586         }
587
588         for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
589                 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace[i][0]);
590                 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace[i][1]);
591         }
592         for(i = 0; i < 2; i++) {
593                 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]);
594                 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]);
595         }
596         for(i = 0; i < 2; i++)
597                 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_extra[i]);
598
599         encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
600
601         return encoder;
602 }
603
604 FLAC_API void FLAC__stream_encoder_delete(FLAC__StreamEncoder *encoder)
605 {
606         unsigned i;
607
608         FLAC__ASSERT(0 != encoder);
609         FLAC__ASSERT(0 != encoder->protected_);
610         FLAC__ASSERT(0 != encoder->private_);
611         FLAC__ASSERT(0 != encoder->private_->frame);
612
613         encoder->private_->is_being_deleted = true;
614
615         (void)FLAC__stream_encoder_finish(encoder);
616
617         if(0 != encoder->private_->verify.decoder)
618                 FLAC__stream_decoder_delete(encoder->private_->verify.decoder);
619
620         for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
621                 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace[i][0]);
622                 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace[i][1]);
623         }
624         for(i = 0; i < 2; i++) {
625                 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]);
626                 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]);
627         }
628         for(i = 0; i < 2; i++)
629                 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_extra[i]);
630
631         FLAC__bitbuffer_delete(encoder->private_->frame);
632         free(encoder->private_);
633         free(encoder->protected_);
634         free(encoder);
635 }
636
637 /***********************************************************************
638  *
639  * Public class methods
640  *
641  ***********************************************************************/
642
643 static FLAC__StreamEncoderInitStatus init_stream_internal_(
644         FLAC__StreamEncoder *encoder,
645         FLAC__StreamEncoderReadCallback read_callback,
646         FLAC__StreamEncoderWriteCallback write_callback,
647         FLAC__StreamEncoderSeekCallback seek_callback,
648         FLAC__StreamEncoderTellCallback tell_callback,
649         FLAC__StreamEncoderMetadataCallback metadata_callback,
650         void *client_data,
651         FLAC__bool is_ogg
652 )
653 {
654         unsigned i;
655         FLAC__bool metadata_has_seektable, metadata_has_vorbis_comment, metadata_picture_has_type1, metadata_picture_has_type2;
656
657         FLAC__ASSERT(0 != encoder);
658
659         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
660                 return FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED;
661
662 #ifndef FLAC__HAS_OGG
663         if(is_ogg)
664                 return FLAC__STREAM_ENCODER_INIT_STATUS_UNSUPPORTED_CONTAINER;
665 #endif
666
667         if(0 == write_callback || (seek_callback && 0 == tell_callback))
668                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_CALLBACKS;
669
670         if(encoder->protected_->channels == 0 || encoder->protected_->channels > FLAC__MAX_CHANNELS)
671                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_NUMBER_OF_CHANNELS;
672
673         if(encoder->protected_->channels != 2) {
674                 encoder->protected_->do_mid_side_stereo = false;
675                 encoder->protected_->loose_mid_side_stereo = false;
676         }
677         else if(!encoder->protected_->do_mid_side_stereo)
678                 encoder->protected_->loose_mid_side_stereo = false;
679
680         if(encoder->protected_->bits_per_sample >= 32)
681                 encoder->protected_->do_mid_side_stereo = false; /* since we currenty do 32-bit math, the side channel would have 33 bps and overflow */
682
683         if(encoder->protected_->bits_per_sample < FLAC__MIN_BITS_PER_SAMPLE || encoder->protected_->bits_per_sample > FLAC__REFERENCE_CODEC_MAX_BITS_PER_SAMPLE)
684                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BITS_PER_SAMPLE;
685
686         if(!FLAC__format_sample_rate_is_valid(encoder->protected_->sample_rate))
687                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_SAMPLE_RATE;
688
689         if(encoder->protected_->blocksize == 0) {
690                 if(encoder->protected_->max_lpc_order == 0)
691                         encoder->protected_->blocksize = 1152;
692                 else
693                         encoder->protected_->blocksize = 4608;
694         }
695
696         if(encoder->protected_->blocksize < FLAC__MIN_BLOCK_SIZE || encoder->protected_->blocksize > FLAC__MAX_BLOCK_SIZE)
697                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BLOCK_SIZE;
698
699         if(encoder->protected_->max_lpc_order > FLAC__MAX_LPC_ORDER)
700                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_MAX_LPC_ORDER;
701
702         if(encoder->protected_->blocksize < encoder->protected_->max_lpc_order)
703                 return FLAC__STREAM_ENCODER_INIT_STATUS_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER;
704
705         if(encoder->protected_->qlp_coeff_precision == 0) {
706                 if(encoder->protected_->bits_per_sample < 16) {
707                         /* @@@ need some data about how to set this here w.r.t. blocksize and sample rate */
708                         /* @@@ until then we'll make a guess */
709                         encoder->protected_->qlp_coeff_precision = max(FLAC__MIN_QLP_COEFF_PRECISION, 2 + encoder->protected_->bits_per_sample / 2);
710                 }
711                 else if(encoder->protected_->bits_per_sample == 16) {
712                         if(encoder->protected_->blocksize <= 192)
713                                 encoder->protected_->qlp_coeff_precision = 7;
714                         else if(encoder->protected_->blocksize <= 384)
715                                 encoder->protected_->qlp_coeff_precision = 8;
716                         else if(encoder->protected_->blocksize <= 576)
717                                 encoder->protected_->qlp_coeff_precision = 9;
718                         else if(encoder->protected_->blocksize <= 1152)
719                                 encoder->protected_->qlp_coeff_precision = 10;
720                         else if(encoder->protected_->blocksize <= 2304)
721                                 encoder->protected_->qlp_coeff_precision = 11;
722                         else if(encoder->protected_->blocksize <= 4608)
723                                 encoder->protected_->qlp_coeff_precision = 12;
724                         else
725                                 encoder->protected_->qlp_coeff_precision = 13;
726                 }
727                 else {
728                         if(encoder->protected_->blocksize <= 384)
729                                 encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION-2;
730                         else if(encoder->protected_->blocksize <= 1152)
731                                 encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION-1;
732                         else
733                                 encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION;
734                 }
735                 FLAC__ASSERT(encoder->protected_->qlp_coeff_precision <= FLAC__MAX_QLP_COEFF_PRECISION);
736         }
737         else if(encoder->protected_->qlp_coeff_precision < FLAC__MIN_QLP_COEFF_PRECISION || encoder->protected_->qlp_coeff_precision > FLAC__MAX_QLP_COEFF_PRECISION)
738                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_QLP_COEFF_PRECISION;
739
740         if(encoder->protected_->streamable_subset) {
741                 if(
742                         encoder->protected_->blocksize != 192 &&
743                         encoder->protected_->blocksize != 576 &&
744                         encoder->protected_->blocksize != 1152 &&
745                         encoder->protected_->blocksize != 2304 &&
746                         encoder->protected_->blocksize != 4608 &&
747                         encoder->protected_->blocksize != 256 &&
748                         encoder->protected_->blocksize != 512 &&
749                         encoder->protected_->blocksize != 1024 &&
750                         encoder->protected_->blocksize != 2048 &&
751                         encoder->protected_->blocksize != 4096 &&
752                         encoder->protected_->blocksize != 8192 &&
753                         encoder->protected_->blocksize != 16384
754                 )
755                         return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
756                 if(
757                         encoder->protected_->sample_rate != 8000 &&
758                         encoder->protected_->sample_rate != 16000 &&
759                         encoder->protected_->sample_rate != 22050 &&
760                         encoder->protected_->sample_rate != 24000 &&
761                         encoder->protected_->sample_rate != 32000 &&
762                         encoder->protected_->sample_rate != 44100 &&
763                         encoder->protected_->sample_rate != 48000 &&
764                         encoder->protected_->sample_rate != 96000
765                 )
766                         return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
767                 if(
768                         encoder->protected_->bits_per_sample != 8 &&
769                         encoder->protected_->bits_per_sample != 12 &&
770                         encoder->protected_->bits_per_sample != 16 &&
771                         encoder->protected_->bits_per_sample != 20 &&
772                         encoder->protected_->bits_per_sample != 24
773                 )
774                         return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
775                 if(encoder->protected_->max_residual_partition_order > FLAC__SUBSET_MAX_RICE_PARTITION_ORDER)
776                         return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
777                 if(
778                         encoder->protected_->sample_rate <= 48000 &&
779                         (
780                                 encoder->protected_->blocksize > FLAC__SUBSET_MAX_BLOCK_SIZE_48000HZ ||
781                                 encoder->protected_->max_lpc_order > FLAC__SUBSET_MAX_LPC_ORDER_48000HZ
782                         )
783                 ) {
784                         return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE;
785                 }
786         }
787
788         if(encoder->protected_->max_residual_partition_order >= (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
789                 encoder->protected_->max_residual_partition_order = (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN) - 1;
790         if(encoder->protected_->min_residual_partition_order >= encoder->protected_->max_residual_partition_order)
791                 encoder->protected_->min_residual_partition_order = encoder->protected_->max_residual_partition_order;
792
793 #if FLAC__HAS_OGG
794         /* reorder metadata if necessary to ensure that any VORBIS_COMMENT is the first, according to the mapping spec */
795         if(is_ogg && 0 != encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 1) {
796                 unsigned i;
797                 for(i = 1; i < encoder->protected_->num_metadata_blocks; i++) {
798                         if(0 != encoder->protected_->metadata[i] && encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
799                                 FLAC__StreamMetadata *vc = encoder->protected_->metadata[i];
800                                 for( ; i > 0; i--)
801                                         encoder->protected_->metadata[i] = encoder->protected_->metadata[i-1];
802                                 encoder->protected_->metadata[0] = vc;
803                                 break;
804                         }
805                 }
806         }
807 #endif
808         /* keep track of any SEEKTABLE block */
809         if(0 != encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 0) {
810                 unsigned i;
811                 for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) {
812                         if(0 != encoder->protected_->metadata[i] && encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_SEEKTABLE) {
813                                 encoder->private_->seek_table = &encoder->protected_->metadata[i]->data.seek_table;
814                                 break; /* take only the first one */
815                         }
816                 }
817         }
818
819         /* validate metadata */
820         if(0 == encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 0)
821                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
822         metadata_has_seektable = false;
823         metadata_has_vorbis_comment = false;
824         metadata_picture_has_type1 = false;
825         metadata_picture_has_type2 = false;
826         for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) {
827                 const FLAC__StreamMetadata *m = encoder->protected_->metadata[i];
828                 if(m->type == FLAC__METADATA_TYPE_STREAMINFO)
829                         return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
830                 else if(m->type == FLAC__METADATA_TYPE_SEEKTABLE) {
831                         if(metadata_has_seektable) /* only one is allowed */
832                                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
833                         metadata_has_seektable = true;
834                         if(!FLAC__format_seektable_is_legal(&m->data.seek_table))
835                                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
836                 }
837                 else if(m->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
838                         if(metadata_has_vorbis_comment) /* only one is allowed */
839                                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
840                         metadata_has_vorbis_comment = true;
841                 }
842                 else if(m->type == FLAC__METADATA_TYPE_CUESHEET) {
843                         if(!FLAC__format_cuesheet_is_legal(&m->data.cue_sheet, m->data.cue_sheet.is_cd, /*violation=*/0))
844                                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
845                 }
846                 else if(m->type == FLAC__METADATA_TYPE_PICTURE) {
847                         if(!FLAC__format_picture_is_legal(&m->data.picture, /*violation=*/0))
848                                 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
849                         if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD) {
850                                 if(metadata_picture_has_type1) /* there should only be 1 per stream */
851                                         return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
852                                 metadata_picture_has_type1 = true;
853                                 /* standard icon must be 32x32 pixel PNG */
854                                 if(
855                                         m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD && 
856                                         (
857                                                 (strcmp(m->data.picture.mime_type, "image/png") && strcmp(m->data.picture.mime_type, "-->")) ||
858                                                 m->data.picture.width != 32 ||
859                                                 m->data.picture.height != 32
860                                         )
861                                 )
862                                         return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
863                         }
864                         else if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON) {
865                                 if(metadata_picture_has_type2) /* there should only be 1 per stream */
866                                         return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA;
867                                 metadata_picture_has_type2 = true;
868                         }
869                 }
870         }
871
872         encoder->private_->input_capacity = 0;
873         for(i = 0; i < encoder->protected_->channels; i++) {
874                 encoder->private_->integer_signal_unaligned[i] = encoder->private_->integer_signal[i] = 0;
875 #ifndef FLAC__INTEGER_ONLY_LIBRARY
876                 encoder->private_->real_signal_unaligned[i] = encoder->private_->real_signal[i] = 0;
877 #endif
878         }
879         for(i = 0; i < 2; i++) {
880                 encoder->private_->integer_signal_mid_side_unaligned[i] = encoder->private_->integer_signal_mid_side[i] = 0;
881 #ifndef FLAC__INTEGER_ONLY_LIBRARY
882                 encoder->private_->real_signal_mid_side_unaligned[i] = encoder->private_->real_signal_mid_side[i] = 0;
883 #endif
884         }
885 #ifndef FLAC__INTEGER_ONLY_LIBRARY
886         for(i = 0; i < encoder->protected_->num_apodizations; i++)
887                 encoder->private_->window_unaligned[i] = encoder->private_->window[i] = 0;
888         encoder->private_->windowed_signal_unaligned = encoder->private_->windowed_signal = 0;
889 #endif
890         for(i = 0; i < encoder->protected_->channels; i++) {
891                 encoder->private_->residual_workspace_unaligned[i][0] = encoder->private_->residual_workspace[i][0] = 0;
892                 encoder->private_->residual_workspace_unaligned[i][1] = encoder->private_->residual_workspace[i][1] = 0;
893                 encoder->private_->best_subframe[i] = 0;
894         }
895         for(i = 0; i < 2; i++) {
896                 encoder->private_->residual_workspace_mid_side_unaligned[i][0] = encoder->private_->residual_workspace_mid_side[i][0] = 0;
897                 encoder->private_->residual_workspace_mid_side_unaligned[i][1] = encoder->private_->residual_workspace_mid_side[i][1] = 0;
898                 encoder->private_->best_subframe_mid_side[i] = 0;
899         }
900         encoder->private_->abs_residual_unaligned = encoder->private_->abs_residual = 0;
901         encoder->private_->abs_residual_partition_sums_unaligned = encoder->private_->abs_residual_partition_sums = 0;
902         encoder->private_->raw_bits_per_partition_unaligned = encoder->private_->raw_bits_per_partition = 0;
903 #ifndef FLAC__INTEGER_ONLY_LIBRARY
904         encoder->private_->loose_mid_side_stereo_frames = (unsigned)((FLAC__double)encoder->protected_->sample_rate * 0.4 / (FLAC__double)encoder->protected_->blocksize + 0.5);
905 #else
906         /* 26214 is the approximate fixed-point equivalent to 0.4 (0.4 * 2^16) */
907         /* sample rate can be up to 655350 Hz, and thus use 20 bits, so we do the multiply&divide by hand */
908         FLAC__ASSERT(FLAC__MAX_SAMPLE_RATE <= 655350);
909         FLAC__ASSERT(FLAC__MAX_BLOCK_SIZE <= 65535);
910         FLAC__ASSERT(encoder->protected_->sample_rate <= 655350);
911         FLAC__ASSERT(encoder->protected_->blocksize <= 65535);
912         encoder->private_->loose_mid_side_stereo_frames = (unsigned)FLAC__fixedpoint_trunc((((FLAC__uint64)(encoder->protected_->sample_rate) * (FLAC__uint64)(26214)) << 16) / (encoder->protected_->blocksize<<16) + FLAC__FP_ONE_HALF);
913 #endif
914         if(encoder->private_->loose_mid_side_stereo_frames == 0)
915                 encoder->private_->loose_mid_side_stereo_frames = 1;
916         encoder->private_->loose_mid_side_stereo_frame_count = 0;
917         encoder->private_->current_sample_number = 0;
918         encoder->private_->current_frame_number = 0;
919
920         encoder->private_->use_wide_by_block = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(encoder->protected_->blocksize)+1 > 30);
921         encoder->private_->use_wide_by_order = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(max(encoder->protected_->max_lpc_order, FLAC__MAX_FIXED_ORDER))+1 > 30); /*@@@ need to use this? */
922         encoder->private_->use_wide_by_partition = (false); /*@@@ need to set this */
923
924         /*
925          * get the CPU info and set the function pointers
926          */
927         FLAC__cpu_info(&encoder->private_->cpuinfo);
928         /* first default to the non-asm routines */
929 #ifndef FLAC__INTEGER_ONLY_LIBRARY
930         encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation;
931 #endif
932         encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor;
933 #ifndef FLAC__INTEGER_ONLY_LIBRARY
934         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients;
935         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit = FLAC__lpc_compute_residual_from_qlp_coefficients_wide;
936         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients;
937 #endif
938         /* now override with asm where appropriate */
939 #ifndef FLAC__INTEGER_ONLY_LIBRARY
940 # ifndef FLAC__NO_ASM
941         if(encoder->private_->cpuinfo.use_asm) {
942 #  ifdef FLAC__CPU_IA32
943                 FLAC__ASSERT(encoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32);
944 #   ifdef FLAC__HAS_NASM
945 #    ifdef FLAC__SSE_OS
946                 if(encoder->private_->cpuinfo.data.ia32.sse) {
947                         if(encoder->protected_->max_lpc_order < 4)
948                                 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_4;
949                         else if(encoder->protected_->max_lpc_order < 8)
950                                 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_8;
951                         else if(encoder->protected_->max_lpc_order < 12)
952                                 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_12;
953                         else
954                                 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;
955                 }
956                 else
957 #    endif /* FLAC__SSE_OS */
958                 if(encoder->private_->cpuinfo.data.ia32._3dnow)
959                         encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_3dnow;
960                 else
961                         encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32;
962                 if(encoder->private_->cpuinfo.data.ia32.mmx) {
963                         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
964                         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx;
965                 }
966                 else {
967                         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
968                         encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32;
969                 }
970                 if(encoder->private_->cpuinfo.data.ia32.mmx && encoder->private_->cpuinfo.data.ia32.cmov)
971                         encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_asm_ia32_mmx_cmov;
972 #   endif /* FLAC__HAS_NASM */
973 #  endif /* FLAC__CPU_IA32 */
974         }
975 # endif /* !FLAC__NO_ASM */
976 #endif /* !FLAC__INTEGER_ONLY_LIBRARY */
977         /* finally override based on wide-ness if necessary */
978         if(encoder->private_->use_wide_by_block) {
979                 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_wide;
980         }
981
982         /* we require precompute_partition_sums if do_escape_coding because of their intertwined nature */
983         encoder->private_->precompute_partition_sums = (encoder->protected_->max_residual_partition_order > encoder->protected_->min_residual_partition_order) || encoder->protected_->do_escape_coding;
984
985         /* set state to OK; from here on, errors are fatal and we'll override the state then */
986         encoder->protected_->state = FLAC__STREAM_ENCODER_OK;
987
988 #if FLAC__HAS_OGG
989         encoder->private_->is_ogg = is_ogg;
990         if(is_ogg && !FLAC__ogg_encoder_aspect_init(&encoder->protected_->ogg_encoder_aspect)) {
991                 encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
992                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
993         }
994 #endif
995
996         encoder->private_->read_callback = read_callback;
997         encoder->private_->write_callback = write_callback;
998         encoder->private_->seek_callback = seek_callback;
999         encoder->private_->tell_callback = tell_callback;
1000         encoder->private_->metadata_callback = metadata_callback;
1001         encoder->private_->client_data = client_data;
1002
1003         if(!resize_buffers_(encoder, encoder->protected_->blocksize)) {
1004                 /* the above function sets the state for us in case of an error */
1005                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1006         }
1007
1008         if(!FLAC__bitbuffer_init(encoder->private_->frame)) {
1009                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1010                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1011         }
1012
1013         /*
1014          * Set up the verify stuff if necessary
1015          */
1016         if(encoder->protected_->verify) {
1017                 /*
1018                  * First, set up the fifo which will hold the
1019                  * original signal to compare against
1020                  */
1021                 encoder->private_->verify.input_fifo.size = encoder->protected_->blocksize;
1022                 for(i = 0; i < encoder->protected_->channels; i++) {
1023                         if(0 == (encoder->private_->verify.input_fifo.data[i] = (FLAC__int32*)malloc(sizeof(FLAC__int32) * encoder->private_->verify.input_fifo.size))) {
1024                                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1025                                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1026                         }
1027                 }
1028                 encoder->private_->verify.input_fifo.tail = 0;
1029
1030                 /*
1031                  * Now set up a stream decoder for verification
1032                  */
1033                 encoder->private_->verify.decoder = FLAC__stream_decoder_new();
1034                 if(0 == encoder->private_->verify.decoder) {
1035                         encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
1036                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1037                 }
1038
1039                 if(FLAC__stream_decoder_init_stream(encoder->private_->verify.decoder, verify_read_callback_, /*seek_callback=*/0, /*tell_callback=*/0, /*length_callback=*/0, /*eof_callback=*/0, verify_write_callback_, verify_metadata_callback_, verify_error_callback_, /*client_data=*/encoder) != FLAC__STREAM_DECODER_INIT_STATUS_OK) {
1040                         encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
1041                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1042                 }
1043         }
1044         encoder->private_->verify.error_stats.absolute_sample = 0;
1045         encoder->private_->verify.error_stats.frame_number = 0;
1046         encoder->private_->verify.error_stats.channel = 0;
1047         encoder->private_->verify.error_stats.sample = 0;
1048         encoder->private_->verify.error_stats.expected = 0;
1049         encoder->private_->verify.error_stats.got = 0;
1050
1051         /*
1052          * These must be done before we write any metadata, because that
1053          * calls the write_callback, which uses these values.
1054          */
1055         encoder->private_->first_seekpoint_to_check = 0;
1056         encoder->private_->samples_written = 0;
1057         encoder->protected_->streaminfo_offset = 0;
1058         encoder->protected_->seektable_offset = 0;
1059         encoder->protected_->audio_offset = 0;
1060
1061         /*
1062          * write the stream header
1063          */
1064         if(encoder->protected_->verify)
1065                 encoder->private_->verify.state_hint = ENCODER_IN_MAGIC;
1066         if(!FLAC__bitbuffer_write_raw_uint32(encoder->private_->frame, FLAC__STREAM_SYNC, FLAC__STREAM_SYNC_LEN)) {
1067                 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1068                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1069         }
1070         if(!write_bitbuffer_(encoder, 0)) {
1071                 /* the above function sets the state for us in case of an error */
1072                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1073         }
1074
1075         /*
1076          * write the STREAMINFO metadata block
1077          */
1078         if(encoder->protected_->verify)
1079                 encoder->private_->verify.state_hint = ENCODER_IN_METADATA;
1080         encoder->private_->streaminfo.type = FLAC__METADATA_TYPE_STREAMINFO;
1081         encoder->private_->streaminfo.is_last = false; /* we will have at a minimum a VORBIS_COMMENT afterwards */
1082         encoder->private_->streaminfo.length = FLAC__STREAM_METADATA_STREAMINFO_LENGTH;
1083         encoder->private_->streaminfo.data.stream_info.min_blocksize = encoder->protected_->blocksize; /* this encoder uses the same blocksize for the whole stream */
1084         encoder->private_->streaminfo.data.stream_info.max_blocksize = encoder->protected_->blocksize;
1085         encoder->private_->streaminfo.data.stream_info.min_framesize = 0; /* we don't know this yet; have to fill it in later */
1086         encoder->private_->streaminfo.data.stream_info.max_framesize = 0; /* we don't know this yet; have to fill it in later */
1087         encoder->private_->streaminfo.data.stream_info.sample_rate = encoder->protected_->sample_rate;
1088         encoder->private_->streaminfo.data.stream_info.channels = encoder->protected_->channels;
1089         encoder->private_->streaminfo.data.stream_info.bits_per_sample = encoder->protected_->bits_per_sample;
1090         encoder->private_->streaminfo.data.stream_info.total_samples = encoder->protected_->total_samples_estimate; /* we will replace this later with the real total */
1091         memset(encoder->private_->streaminfo.data.stream_info.md5sum, 0, 16); /* we don't know this yet; have to fill it in later */
1092         FLAC__MD5Init(&encoder->private_->md5context);
1093         if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
1094                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1095                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1096         }
1097         if(!FLAC__add_metadata_block(&encoder->private_->streaminfo, encoder->private_->frame)) {
1098                 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1099                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1100         }
1101         if(!write_bitbuffer_(encoder, 0)) {
1102                 /* the above function sets the state for us in case of an error */
1103                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1104         }
1105
1106         /*
1107          * Now that the STREAMINFO block is written, we can init this to an
1108          * absurdly-high value...
1109          */
1110         encoder->private_->streaminfo.data.stream_info.min_framesize = (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN) - 1;
1111         /* ... and clear this to 0 */
1112         encoder->private_->streaminfo.data.stream_info.total_samples = 0;
1113
1114         /*
1115          * Check to see if the supplied metadata contains a VORBIS_COMMENT;
1116          * if not, we will write an empty one (FLAC__add_metadata_block()
1117          * automatically supplies the vendor string).
1118          *
1119          * WATCHOUT: the Ogg FLAC mapping requires us to write this block after
1120          * the STREAMINFO.  (In the case that metadata_has_vorbis_comment is
1121          * true it will have already insured that the metadata list is properly
1122          * ordered.)
1123          */
1124         if(!metadata_has_vorbis_comment) {
1125                 FLAC__StreamMetadata vorbis_comment;
1126                 vorbis_comment.type = FLAC__METADATA_TYPE_VORBIS_COMMENT;
1127                 vorbis_comment.is_last = (encoder->protected_->num_metadata_blocks == 0);
1128                 vorbis_comment.length = 4 + 4; /* MAGIC NUMBER */
1129                 vorbis_comment.data.vorbis_comment.vendor_string.length = 0;
1130                 vorbis_comment.data.vorbis_comment.vendor_string.entry = 0;
1131                 vorbis_comment.data.vorbis_comment.num_comments = 0;
1132                 vorbis_comment.data.vorbis_comment.comments = 0;
1133                 if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
1134                         encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1135                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1136                 }
1137                 if(!FLAC__add_metadata_block(&vorbis_comment, encoder->private_->frame)) {
1138                         encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1139                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1140                 }
1141                 if(!write_bitbuffer_(encoder, 0)) {
1142                         /* the above function sets the state for us in case of an error */
1143                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1144                 }
1145         }
1146
1147         /*
1148          * write the user's metadata blocks
1149          */
1150         for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) {
1151                 encoder->protected_->metadata[i]->is_last = (i == encoder->protected_->num_metadata_blocks - 1);
1152                 if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
1153                         encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
1154                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1155                 }
1156                 if(!FLAC__add_metadata_block(encoder->protected_->metadata[i], encoder->private_->frame)) {
1157                         encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
1158                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1159                 }
1160                 if(!write_bitbuffer_(encoder, 0)) {
1161                         /* the above function sets the state for us in case of an error */
1162                         return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1163                 }
1164         }
1165
1166         /* now that all the metadata is written, we save the stream offset */
1167         if(encoder->private_->tell_callback && encoder->private_->tell_callback(encoder, &encoder->protected_->audio_offset, encoder->private_->client_data) == FLAC__STREAM_ENCODER_TELL_STATUS_ERROR) { /* FLAC__STREAM_ENCODER_TELL_STATUS_UNSUPPORTED just means we didn't get the offset; no error */
1168                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
1169                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1170         }
1171
1172         if(encoder->protected_->verify)
1173                 encoder->private_->verify.state_hint = ENCODER_IN_AUDIO;
1174
1175         return FLAC__STREAM_ENCODER_INIT_STATUS_OK;
1176 }
1177
1178 FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_stream(
1179         FLAC__StreamEncoder *encoder,
1180         FLAC__StreamEncoderWriteCallback write_callback,
1181         FLAC__StreamEncoderSeekCallback seek_callback,
1182         FLAC__StreamEncoderTellCallback tell_callback,
1183         FLAC__StreamEncoderMetadataCallback metadata_callback,
1184         void *client_data
1185 )
1186 {
1187         return init_stream_internal_(
1188                 encoder,
1189                 /*read_callback=*/0,
1190                 write_callback,
1191                 seek_callback,
1192                 tell_callback,
1193                 metadata_callback,
1194                 client_data,
1195                 /*is_ogg=*/false
1196         );
1197 }
1198
1199 FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_stream(
1200         FLAC__StreamEncoder *encoder,
1201         FLAC__StreamEncoderReadCallback read_callback,
1202         FLAC__StreamEncoderWriteCallback write_callback,
1203         FLAC__StreamEncoderSeekCallback seek_callback,
1204         FLAC__StreamEncoderTellCallback tell_callback,
1205         FLAC__StreamEncoderMetadataCallback metadata_callback,
1206         void *client_data
1207 )
1208 {
1209         return init_stream_internal_(
1210                 encoder,
1211                 read_callback,
1212                 write_callback,
1213                 seek_callback,
1214                 tell_callback,
1215                 metadata_callback,
1216                 client_data,
1217                 /*is_ogg=*/true
1218         );
1219 }
1220  
1221 static FLAC__StreamEncoderInitStatus init_FILE_internal_(
1222         FLAC__StreamEncoder *encoder,
1223         FILE *file,
1224         FLAC__StreamEncoderProgressCallback progress_callback,
1225         void *client_data,
1226         FLAC__bool is_ogg
1227 )
1228 {
1229         FLAC__StreamEncoderInitStatus init_status;
1230
1231         FLAC__ASSERT(0 != encoder);
1232         FLAC__ASSERT(0 != file);
1233
1234         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1235                 return FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED;
1236
1237         /* double protection */
1238         if(file == 0) {
1239                 encoder->protected_->state = FLAC__STREAM_ENCODER_IO_ERROR;
1240                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1241         }
1242
1243         /*
1244          * To make sure that our file does not go unclosed after an error, we
1245          * must assign the FILE pointer before any further error can occur in
1246          * this routine.
1247          */
1248         if(file == stdout)
1249                 file = get_binary_stdout_(); /* just to be safe */
1250
1251         encoder->private_->file = file;
1252
1253         encoder->private_->progress_callback = progress_callback;
1254         encoder->private_->bytes_written = 0;
1255         encoder->private_->samples_written = 0;
1256         encoder->private_->frames_written = 0;
1257
1258         init_status = init_stream_internal_(
1259                 encoder,
1260                 is_ogg? file_read_callback_ : 0,
1261                 file_write_callback_,
1262                 file_seek_callback_,
1263                 file_tell_callback_,
1264                 /*metadata_callback=*/0,
1265                 client_data,
1266                 is_ogg
1267         );
1268         if(init_status != FLAC__STREAM_ENCODER_INIT_STATUS_OK) {
1269                 /* the above function sets the state for us in case of an error */
1270                 return init_status;
1271         }
1272
1273         {
1274                 unsigned blocksize = FLAC__stream_encoder_get_blocksize(encoder);
1275
1276                 FLAC__ASSERT(blocksize != 0);
1277                 encoder->private_->total_frames_estimate = (unsigned)((FLAC__stream_encoder_get_total_samples_estimate(encoder) + blocksize - 1) / blocksize);
1278         }
1279
1280         return init_status;
1281 }
1282  
1283 FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_FILE(
1284         FLAC__StreamEncoder *encoder,
1285         FILE *file,
1286         FLAC__StreamEncoderProgressCallback progress_callback,
1287         void *client_data
1288 )
1289 {
1290         return init_FILE_internal_(encoder, file, progress_callback, client_data, /*is_ogg=*/false);
1291 }
1292  
1293 FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_FILE(
1294         FLAC__StreamEncoder *encoder,
1295         FILE *file,
1296         FLAC__StreamEncoderProgressCallback progress_callback,
1297         void *client_data
1298 )
1299 {
1300         return init_FILE_internal_(encoder, file, progress_callback, client_data, /*is_ogg=*/true);
1301 }
1302
1303 static FLAC__StreamEncoderInitStatus init_file_internal_(
1304         FLAC__StreamEncoder *encoder,
1305         const char *filename,
1306         FLAC__StreamEncoderProgressCallback progress_callback,
1307         void *client_data,
1308         FLAC__bool is_ogg
1309 )
1310 {
1311         FILE *file;
1312
1313         FLAC__ASSERT(0 != encoder);
1314
1315         /*
1316          * To make sure that our file does not go unclosed after an error, we
1317          * have to do the same entrance checks here that are later performed
1318          * in FLAC__stream_encoder_init_FILE() before the FILE* is assigned.
1319          */
1320         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1321                 return FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED;
1322
1323         file = filename? fopen(filename, "w+b") : stdout;
1324
1325         if(file == 0) {
1326                 encoder->protected_->state = FLAC__STREAM_ENCODER_IO_ERROR;
1327                 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR;
1328         }
1329
1330         return init_FILE_internal_(encoder, file, progress_callback, client_data, is_ogg);
1331 }
1332
1333 FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_file(
1334         FLAC__StreamEncoder *encoder,
1335         const char *filename,
1336         FLAC__StreamEncoderProgressCallback progress_callback,
1337         void *client_data
1338 )
1339 {
1340         return init_file_internal_(encoder, filename, progress_callback, client_data, /*is_ogg=*/false);
1341 }
1342
1343 FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_file(
1344         FLAC__StreamEncoder *encoder,
1345         const char *filename,
1346         FLAC__StreamEncoderProgressCallback progress_callback,
1347         void *client_data
1348 )
1349 {
1350         return init_file_internal_(encoder, filename, progress_callback, client_data, /*is_ogg=*/true);
1351 }
1352
1353 FLAC_API FLAC__bool FLAC__stream_encoder_finish(FLAC__StreamEncoder *encoder)
1354 {
1355         FLAC__bool verify_mismatch = false;
1356
1357         FLAC__ASSERT(0 != encoder);
1358         FLAC__ASSERT(0 != encoder->private_);
1359         FLAC__ASSERT(0 != encoder->protected_);
1360
1361         if(encoder->protected_->state == FLAC__STREAM_ENCODER_UNINITIALIZED)
1362                 return true;
1363
1364         if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK && !encoder->private_->is_being_deleted) {
1365                 if(encoder->private_->current_sample_number != 0) {
1366                         encoder->protected_->blocksize = encoder->private_->current_sample_number;
1367                         if(!process_frame_(encoder, /*is_fractional_block=*/true) && encoder->protected_->state == FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA)
1368                                 verify_mismatch = true;
1369                 }
1370         }
1371
1372         FLAC__MD5Final(encoder->private_->streaminfo.data.stream_info.md5sum, &encoder->private_->md5context);
1373
1374         if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK && !encoder->private_->is_being_deleted) {
1375                 if(encoder->private_->seek_callback) {
1376 #if FLAC__HAS_OGG
1377                         if(encoder->private_->is_ogg)
1378                                 update_ogg_metadata_(encoder);
1379                         else
1380 #endif
1381                         update_metadata_(encoder);
1382                 }
1383                 if(encoder->private_->metadata_callback)
1384                         encoder->private_->metadata_callback(encoder, &encoder->private_->streaminfo, encoder->private_->client_data);
1385         }
1386
1387         if(encoder->protected_->verify && 0 != encoder->private_->verify.decoder && !FLAC__stream_decoder_finish(encoder->private_->verify.decoder))
1388                 verify_mismatch = true;
1389
1390         if(0 != encoder->private_->file) {
1391                 if(encoder->private_->file != stdout)
1392                         fclose(encoder->private_->file);
1393                 encoder->private_->file = 0;
1394         }
1395
1396 #if FLAC__HAS_OGG
1397         if(encoder->private_->is_ogg)
1398                 FLAC__ogg_encoder_aspect_finish(&encoder->protected_->ogg_encoder_aspect);
1399 #endif
1400
1401         free_(encoder);
1402         set_defaults_(encoder);
1403
1404         /* change the state to uninitialized unless there was a verify mismatch */
1405         if(verify_mismatch)
1406                 encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA;
1407         else
1408                 encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED;
1409
1410         return !verify_mismatch;
1411 }
1412
1413 FLAC_API FLAC__bool FLAC__stream_encoder_set_ogg_serial_number(FLAC__StreamEncoder *encoder, long value)
1414 {
1415         FLAC__ASSERT(0 != encoder);
1416         FLAC__ASSERT(0 != encoder->private_);
1417         FLAC__ASSERT(0 != encoder->protected_);
1418         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1419                 return false;
1420 #ifdef FLAC__HAS_OGG
1421         /* can't check encoder->private_->is_ogg since that's not set until init time */
1422         FLAC__ogg_encoder_aspect_set_serial_number(&encoder->protected_->ogg_encoder_aspect, value);
1423         return true;
1424 #else
1425         (void)value;
1426         return false;
1427 #endif
1428 }
1429
1430 FLAC_API FLAC__bool FLAC__stream_encoder_set_verify(FLAC__StreamEncoder *encoder, FLAC__bool value)
1431 {
1432         FLAC__ASSERT(0 != encoder);
1433         FLAC__ASSERT(0 != encoder->private_);
1434         FLAC__ASSERT(0 != encoder->protected_);
1435         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1436                 return false;
1437 #ifndef FLAC__MANDATORY_VERIFY_WHILE_ENCODING
1438         encoder->protected_->verify = value;
1439 #endif
1440         return true;
1441 }
1442
1443 FLAC_API FLAC__bool FLAC__stream_encoder_set_streamable_subset(FLAC__StreamEncoder *encoder, FLAC__bool value)
1444 {
1445         FLAC__ASSERT(0 != encoder);
1446         FLAC__ASSERT(0 != encoder->private_);
1447         FLAC__ASSERT(0 != encoder->protected_);
1448         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1449                 return false;
1450         encoder->protected_->streamable_subset = value;
1451         return true;
1452 }
1453
1454 FLAC_API FLAC__bool FLAC__stream_encoder_set_channels(FLAC__StreamEncoder *encoder, unsigned value)
1455 {
1456         FLAC__ASSERT(0 != encoder);
1457         FLAC__ASSERT(0 != encoder->private_);
1458         FLAC__ASSERT(0 != encoder->protected_);
1459         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1460                 return false;
1461         encoder->protected_->channels = value;
1462         return true;
1463 }
1464
1465 FLAC_API FLAC__bool FLAC__stream_encoder_set_bits_per_sample(FLAC__StreamEncoder *encoder, unsigned value)
1466 {
1467         FLAC__ASSERT(0 != encoder);
1468         FLAC__ASSERT(0 != encoder->private_);
1469         FLAC__ASSERT(0 != encoder->protected_);
1470         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1471                 return false;
1472         encoder->protected_->bits_per_sample = value;
1473         return true;
1474 }
1475
1476 FLAC_API FLAC__bool FLAC__stream_encoder_set_sample_rate(FLAC__StreamEncoder *encoder, unsigned value)
1477 {
1478         FLAC__ASSERT(0 != encoder);
1479         FLAC__ASSERT(0 != encoder->private_);
1480         FLAC__ASSERT(0 != encoder->protected_);
1481         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1482                 return false;
1483         encoder->protected_->sample_rate = value;
1484         return true;
1485 }
1486
1487 FLAC_API FLAC__bool FLAC__stream_encoder_set_compression_level(FLAC__StreamEncoder *encoder, unsigned value)
1488 {
1489         FLAC__bool ok = true;
1490         FLAC__ASSERT(0 != encoder);
1491         FLAC__ASSERT(0 != encoder->private_);
1492         FLAC__ASSERT(0 != encoder->protected_);
1493         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1494                 return false;
1495         if(value >= sizeof(compression_levels_)/sizeof(compression_levels_[0]))
1496                 value = sizeof(compression_levels_)/sizeof(compression_levels_[0]) - 1;
1497         ok &= FLAC__stream_encoder_set_do_mid_side_stereo          (encoder, compression_levels_[value].do_mid_side_stereo);
1498         ok &= FLAC__stream_encoder_set_loose_mid_side_stereo       (encoder, compression_levels_[value].loose_mid_side_stereo);
1499         ok &= FLAC__stream_encoder_set_apodization                 (encoder, compression_levels_[value].apodization);
1500         ok &= FLAC__stream_encoder_set_max_lpc_order               (encoder, compression_levels_[value].max_lpc_order);
1501         ok &= FLAC__stream_encoder_set_qlp_coeff_precision         (encoder, compression_levels_[value].qlp_coeff_precision);
1502         ok &= FLAC__stream_encoder_set_do_qlp_coeff_prec_search    (encoder, compression_levels_[value].do_qlp_coeff_prec_search);
1503         ok &= FLAC__stream_encoder_set_do_escape_coding            (encoder, compression_levels_[value].do_escape_coding);
1504         ok &= FLAC__stream_encoder_set_do_exhaustive_model_search  (encoder, compression_levels_[value].do_exhaustive_model_search);
1505         ok &= FLAC__stream_encoder_set_min_residual_partition_order(encoder, compression_levels_[value].min_residual_partition_order);
1506         ok &= FLAC__stream_encoder_set_max_residual_partition_order(encoder, compression_levels_[value].max_residual_partition_order);
1507         ok &= FLAC__stream_encoder_set_rice_parameter_search_dist  (encoder, compression_levels_[value].rice_parameter_search_dist);
1508         return ok;
1509 }
1510
1511 FLAC_API FLAC__bool FLAC__stream_encoder_set_blocksize(FLAC__StreamEncoder *encoder, unsigned value)
1512 {
1513         FLAC__ASSERT(0 != encoder);
1514         FLAC__ASSERT(0 != encoder->private_);
1515         FLAC__ASSERT(0 != encoder->protected_);
1516         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1517                 return false;
1518         encoder->protected_->blocksize = value;
1519         return true;
1520 }
1521
1522 FLAC_API FLAC__bool FLAC__stream_encoder_set_do_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value)
1523 {
1524         FLAC__ASSERT(0 != encoder);
1525         FLAC__ASSERT(0 != encoder->private_);
1526         FLAC__ASSERT(0 != encoder->protected_);
1527         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1528                 return false;
1529         encoder->protected_->do_mid_side_stereo = value;
1530         return true;
1531 }
1532
1533 FLAC_API FLAC__bool FLAC__stream_encoder_set_loose_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value)
1534 {
1535         FLAC__ASSERT(0 != encoder);
1536         FLAC__ASSERT(0 != encoder->private_);
1537         FLAC__ASSERT(0 != encoder->protected_);
1538         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1539                 return false;
1540         encoder->protected_->loose_mid_side_stereo = value;
1541         return true;
1542 }
1543
1544 FLAC_API FLAC__bool FLAC__stream_encoder_set_apodization(FLAC__StreamEncoder *encoder, const char *specification)
1545 {
1546         FLAC__ASSERT(0 != encoder);
1547         FLAC__ASSERT(0 != encoder->private_);
1548         FLAC__ASSERT(0 != encoder->protected_);
1549         FLAC__ASSERT(0 != specification);
1550         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1551                 return false;
1552 #ifdef FLAC__INTEGER_ONLY_LIBRARY
1553         (void)specification; /* silently ignore since we haven't integerized; will always use a rectangular window */
1554 #else
1555         encoder->protected_->num_apodizations = 0;
1556         while(1) {
1557                 const char *s = strchr(specification, ';');
1558                 const size_t n = s? (size_t)(s - specification) : strlen(specification);
1559                 if     (n==8  && 0 == strncmp("bartlett"     , specification, n))
1560                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BARTLETT;
1561                 else if(n==13 && 0 == strncmp("bartlett_hann", specification, n))
1562                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BARTLETT_HANN;
1563                 else if(n==8  && 0 == strncmp("blackman"     , specification, n))
1564                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BLACKMAN;
1565                 else if(n==26 && 0 == strncmp("blackman_harris_4term_92db", specification, n))
1566                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BLACKMAN_HARRIS_4TERM_92DB_SIDELOBE;
1567                 else if(n==6  && 0 == strncmp("connes"       , specification, n))
1568                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_CONNES;
1569                 else if(n==7  && 0 == strncmp("flattop"      , specification, n))
1570                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_FLATTOP;
1571                 else if(n>7   && 0 == strncmp("gauss("       , specification, 6)) {
1572                         FLAC__real stddev = (FLAC__real)strtod(specification+6, 0);
1573                         if (stddev > 0.0 && stddev <= 0.5) {
1574                                 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.gauss.stddev = stddev;
1575                                 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_GAUSS;
1576                         }
1577                 }
1578                 else if(n==7  && 0 == strncmp("hamming"      , specification, n))
1579                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_HAMMING;
1580                 else if(n==4  && 0 == strncmp("hann"         , specification, n))
1581                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_HANN;
1582                 else if(n==13 && 0 == strncmp("kaiser_bessel", specification, n))
1583                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_KAISER_BESSEL;
1584                 else if(n==7  && 0 == strncmp("nuttall"      , specification, n))
1585                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_NUTTALL;
1586                 else if(n==9  && 0 == strncmp("rectangle"    , specification, n))
1587                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_RECTANGLE;
1588                 else if(n==8  && 0 == strncmp("triangle"     , specification, n))
1589                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_TRIANGLE;
1590                 else if(n>7   && 0 == strncmp("tukey("       , specification, 6)) {
1591                         FLAC__real p = (FLAC__real)strtod(specification+6, 0);
1592                         if (p >= 0.0 && p <= 1.0) {
1593                                 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.tukey.p = p;
1594                                 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_TUKEY;
1595                         }
1596                 }
1597                 else if(n==5  && 0 == strncmp("welch"        , specification, n))
1598                         encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_WELCH;
1599                 if (encoder->protected_->num_apodizations == 32)
1600                         break;
1601                 if (s)
1602                         specification = s+1;
1603                 else
1604                         break;
1605         }
1606         if(encoder->protected_->num_apodizations == 0) {
1607                 encoder->protected_->num_apodizations = 1;
1608                 encoder->protected_->apodizations[0].type = FLAC__APODIZATION_TUKEY;
1609                 encoder->protected_->apodizations[0].parameters.tukey.p = 0.5;
1610         }
1611 #endif
1612         return true;
1613 }
1614
1615 FLAC_API FLAC__bool FLAC__stream_encoder_set_max_lpc_order(FLAC__StreamEncoder *encoder, unsigned value)
1616 {
1617         FLAC__ASSERT(0 != encoder);
1618         FLAC__ASSERT(0 != encoder->private_);
1619         FLAC__ASSERT(0 != encoder->protected_);
1620         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1621                 return false;
1622         encoder->protected_->max_lpc_order = value;
1623         return true;
1624 }
1625
1626 FLAC_API FLAC__bool FLAC__stream_encoder_set_qlp_coeff_precision(FLAC__StreamEncoder *encoder, unsigned value)
1627 {
1628         FLAC__ASSERT(0 != encoder);
1629         FLAC__ASSERT(0 != encoder->private_);
1630         FLAC__ASSERT(0 != encoder->protected_);
1631         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1632                 return false;
1633         encoder->protected_->qlp_coeff_precision = value;
1634         return true;
1635 }
1636
1637 FLAC_API FLAC__bool FLAC__stream_encoder_set_do_qlp_coeff_prec_search(FLAC__StreamEncoder *encoder, FLAC__bool value)
1638 {
1639         FLAC__ASSERT(0 != encoder);
1640         FLAC__ASSERT(0 != encoder->private_);
1641         FLAC__ASSERT(0 != encoder->protected_);
1642         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1643                 return false;
1644         encoder->protected_->do_qlp_coeff_prec_search = value;
1645         return true;
1646 }
1647
1648 FLAC_API FLAC__bool FLAC__stream_encoder_set_do_escape_coding(FLAC__StreamEncoder *encoder, FLAC__bool value)
1649 {
1650         FLAC__ASSERT(0 != encoder);
1651         FLAC__ASSERT(0 != encoder->private_);
1652         FLAC__ASSERT(0 != encoder->protected_);
1653         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1654                 return false;
1655 #if 0
1656         /*@@@ deprecated: */
1657         encoder->protected_->do_escape_coding = value;
1658 #else
1659         (void)value;
1660 #endif
1661         return true;
1662 }
1663
1664 FLAC_API FLAC__bool FLAC__stream_encoder_set_do_exhaustive_model_search(FLAC__StreamEncoder *encoder, FLAC__bool value)
1665 {
1666         FLAC__ASSERT(0 != encoder);
1667         FLAC__ASSERT(0 != encoder->private_);
1668         FLAC__ASSERT(0 != encoder->protected_);
1669         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1670                 return false;
1671         encoder->protected_->do_exhaustive_model_search = value;
1672         return true;
1673 }
1674
1675 FLAC_API FLAC__bool FLAC__stream_encoder_set_min_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value)
1676 {
1677         FLAC__ASSERT(0 != encoder);
1678         FLAC__ASSERT(0 != encoder->private_);
1679         FLAC__ASSERT(0 != encoder->protected_);
1680         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1681                 return false;
1682         encoder->protected_->min_residual_partition_order = value;
1683         return true;
1684 }
1685
1686 FLAC_API FLAC__bool FLAC__stream_encoder_set_max_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value)
1687 {
1688         FLAC__ASSERT(0 != encoder);
1689         FLAC__ASSERT(0 != encoder->private_);
1690         FLAC__ASSERT(0 != encoder->protected_);
1691         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1692                 return false;
1693         encoder->protected_->max_residual_partition_order = value;
1694         return true;
1695 }
1696
1697 FLAC_API FLAC__bool FLAC__stream_encoder_set_rice_parameter_search_dist(FLAC__StreamEncoder *encoder, unsigned value)
1698 {
1699         FLAC__ASSERT(0 != encoder);
1700         FLAC__ASSERT(0 != encoder->private_);
1701         FLAC__ASSERT(0 != encoder->protected_);
1702         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1703                 return false;
1704 #if 0
1705         /*@@@ deprecated: */
1706         encoder->protected_->rice_parameter_search_dist = value;
1707 #else
1708         (void)value;
1709 #endif
1710         return true;
1711 }
1712
1713 FLAC_API FLAC__bool FLAC__stream_encoder_set_total_samples_estimate(FLAC__StreamEncoder *encoder, FLAC__uint64 value)
1714 {
1715         FLAC__ASSERT(0 != encoder);
1716         FLAC__ASSERT(0 != encoder->private_);
1717         FLAC__ASSERT(0 != encoder->protected_);
1718         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1719                 return false;
1720         encoder->protected_->total_samples_estimate = value;
1721         return true;
1722 }
1723
1724 FLAC_API FLAC__bool FLAC__stream_encoder_set_metadata(FLAC__StreamEncoder *encoder, FLAC__StreamMetadata **metadata, unsigned num_blocks)
1725 {
1726         FLAC__ASSERT(0 != encoder);
1727         FLAC__ASSERT(0 != encoder->private_);
1728         FLAC__ASSERT(0 != encoder->protected_);
1729         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1730                 return false;
1731         encoder->protected_->metadata = metadata;
1732         encoder->protected_->num_metadata_blocks = num_blocks;
1733 #if FLAC__HAS_OGG
1734         if(!FLAC__ogg_encoder_aspect_set_num_metadata(&encoder->protected_->ogg_encoder_aspect, num_blocks))
1735                 return false;
1736 #endif
1737         return true;
1738 }
1739
1740 /*
1741  * These three functions are not static, but not publically exposed in
1742  * include/FLAC/ either.  They are used by the test suite.
1743  */
1744 FLAC_API FLAC__bool FLAC__stream_encoder_disable_constant_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
1745 {
1746         FLAC__ASSERT(0 != encoder);
1747         FLAC__ASSERT(0 != encoder->private_);
1748         FLAC__ASSERT(0 != encoder->protected_);
1749         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1750                 return false;
1751         encoder->private_->disable_constant_subframes = value;
1752         return true;
1753 }
1754
1755 FLAC_API FLAC__bool FLAC__stream_encoder_disable_fixed_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
1756 {
1757         FLAC__ASSERT(0 != encoder);
1758         FLAC__ASSERT(0 != encoder->private_);
1759         FLAC__ASSERT(0 != encoder->protected_);
1760         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1761                 return false;
1762         encoder->private_->disable_fixed_subframes = value;
1763         return true;
1764 }
1765
1766 FLAC_API FLAC__bool FLAC__stream_encoder_disable_verbatim_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value)
1767 {
1768         FLAC__ASSERT(0 != encoder);
1769         FLAC__ASSERT(0 != encoder->private_);
1770         FLAC__ASSERT(0 != encoder->protected_);
1771         if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED)
1772                 return false;
1773         encoder->private_->disable_verbatim_subframes = value;
1774         return true;
1775 }
1776
1777 FLAC_API FLAC__StreamEncoderState FLAC__stream_encoder_get_state(const FLAC__StreamEncoder *encoder)
1778 {
1779         FLAC__ASSERT(0 != encoder);
1780         FLAC__ASSERT(0 != encoder->private_);
1781         FLAC__ASSERT(0 != encoder->protected_);
1782         return encoder->protected_->state;
1783 }
1784
1785 FLAC_API FLAC__StreamDecoderState FLAC__stream_encoder_get_verify_decoder_state(const FLAC__StreamEncoder *encoder)
1786 {
1787         FLAC__ASSERT(0 != encoder);
1788         FLAC__ASSERT(0 != encoder->private_);
1789         FLAC__ASSERT(0 != encoder->protected_);
1790         if(encoder->protected_->verify)
1791                 return FLAC__stream_decoder_get_state(encoder->private_->verify.decoder);
1792         else
1793                 return FLAC__STREAM_DECODER_UNINITIALIZED;
1794 }
1795
1796 FLAC_API const char *FLAC__stream_encoder_get_resolved_state_string(const FLAC__StreamEncoder *encoder)
1797 {
1798         FLAC__ASSERT(0 != encoder);
1799         FLAC__ASSERT(0 != encoder->private_);
1800         FLAC__ASSERT(0 != encoder->protected_);
1801         if(encoder->protected_->state != FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR)
1802                 return FLAC__StreamEncoderStateString[encoder->protected_->state];
1803         else
1804                 return FLAC__stream_decoder_get_resolved_state_string(encoder->private_->verify.decoder);
1805 }
1806
1807 FLAC_API void FLAC__stream_encoder_get_verify_decoder_error_stats(const FLAC__StreamEncoder *encoder, FLAC__uint64 *absolute_sample, unsigned *frame_number, unsigned *channel, unsigned *sample, FLAC__int32 *expected, FLAC__int32 *got)
1808 {
1809         FLAC__ASSERT(0 != encoder);
1810         FLAC__ASSERT(0 != encoder->private_);
1811         FLAC__ASSERT(0 != encoder->protected_);
1812         if(0 != absolute_sample)
1813                 *absolute_sample = encoder->private_->verify.error_stats.absolute_sample;
1814         if(0 != frame_number)
1815                 *frame_number = encoder->private_->verify.error_stats.frame_number;
1816         if(0 != channel)
1817                 *channel = encoder->private_->verify.error_stats.channel;
1818         if(0 != sample)
1819                 *sample = encoder->private_->verify.error_stats.sample;
1820         if(0 != expected)
1821                 *expected = encoder->private_->verify.error_stats.expected;
1822         if(0 != got)
1823                 *got = encoder->private_->verify.error_stats.got;
1824 }
1825
1826 FLAC_API FLAC__bool FLAC__stream_encoder_get_verify(const FLAC__StreamEncoder *encoder)
1827 {
1828         FLAC__ASSERT(0 != encoder);
1829         FLAC__ASSERT(0 != encoder->private_);
1830         FLAC__ASSERT(0 != encoder->protected_);
1831         return encoder->protected_->verify;
1832 }
1833
1834 FLAC_API FLAC__bool FLAC__stream_encoder_get_streamable_subset(const FLAC__StreamEncoder *encoder)
1835 {
1836         FLAC__ASSERT(0 != encoder);
1837         FLAC__ASSERT(0 != encoder->private_);
1838         FLAC__ASSERT(0 != encoder->protected_);
1839         return encoder->protected_->streamable_subset;
1840 }
1841
1842 FLAC_API unsigned FLAC__stream_encoder_get_channels(const FLAC__StreamEncoder *encoder)
1843 {
1844         FLAC__ASSERT(0 != encoder);
1845         FLAC__ASSERT(0 != encoder->private_);
1846         FLAC__ASSERT(0 != encoder->protected_);
1847         return encoder->protected_->channels;
1848 }
1849
1850 FLAC_API unsigned FLAC__stream_encoder_get_bits_per_sample(const FLAC__StreamEncoder *encoder)
1851 {
1852         FLAC__ASSERT(0 != encoder);
1853         FLAC__ASSERT(0 != encoder->private_);
1854         FLAC__ASSERT(0 != encoder->protected_);
1855         return encoder->protected_->bits_per_sample;
1856 }
1857
1858 FLAC_API unsigned FLAC__stream_encoder_get_sample_rate(const FLAC__StreamEncoder *encoder)
1859 {
1860         FLAC__ASSERT(0 != encoder);
1861         FLAC__ASSERT(0 != encoder->private_);
1862         FLAC__ASSERT(0 != encoder->protected_);
1863         return encoder->protected_->sample_rate;
1864 }
1865
1866 FLAC_API unsigned FLAC__stream_encoder_get_blocksize(const FLAC__StreamEncoder *encoder)
1867 {
1868         FLAC__ASSERT(0 != encoder);
1869         FLAC__ASSERT(0 != encoder->private_);
1870         FLAC__ASSERT(0 != encoder->protected_);
1871         return encoder->protected_->blocksize;
1872 }
1873
1874 FLAC_API FLAC__bool FLAC__stream_encoder_get_do_mid_side_stereo(const FLAC__StreamEncoder *encoder)
1875 {
1876         FLAC__ASSERT(0 != encoder);
1877         FLAC__ASSERT(0 != encoder->private_);
1878         FLAC__ASSERT(0 != encoder->protected_);
1879         return encoder->protected_->do_mid_side_stereo;
1880 }
1881
1882 FLAC_API FLAC__bool FLAC__stream_encoder_get_loose_mid_side_stereo(const FLAC__StreamEncoder *encoder)
1883 {
1884         FLAC__ASSERT(0 != encoder);
1885         FLAC__ASSERT(0 != encoder->private_);
1886         FLAC__ASSERT(0 != encoder->protected_);
1887         return encoder->protected_->loose_mid_side_stereo;
1888 }
1889
1890 FLAC_API unsigned FLAC__stream_encoder_get_max_lpc_order(const FLAC__StreamEncoder *encoder)
1891 {
1892         FLAC__ASSERT(0 != encoder);
1893         FLAC__ASSERT(0 != encoder->private_);
1894         FLAC__ASSERT(0 != encoder->protected_);
1895         return encoder->protected_->max_lpc_order;
1896 }
1897
1898 FLAC_API unsigned FLAC__stream_encoder_get_qlp_coeff_precision(const FLAC__StreamEncoder *encoder)
1899 {
1900         FLAC__ASSERT(0 != encoder);
1901         FLAC__ASSERT(0 != encoder->private_);
1902         FLAC__ASSERT(0 != encoder->protected_);
1903         return encoder->protected_->qlp_coeff_precision;
1904 }
1905
1906 FLAC_API FLAC__bool FLAC__stream_encoder_get_do_qlp_coeff_prec_search(const FLAC__StreamEncoder *encoder)
1907 {
1908         FLAC__ASSERT(0 != encoder);
1909         FLAC__ASSERT(0 != encoder->private_);
1910         FLAC__ASSERT(0 != encoder->protected_);
1911         return encoder->protected_->do_qlp_coeff_prec_search;
1912 }
1913
1914 FLAC_API FLAC__bool FLAC__stream_encoder_get_do_escape_coding(const FLAC__StreamEncoder *encoder)
1915 {
1916         FLAC__ASSERT(0 != encoder);
1917         FLAC__ASSERT(0 != encoder->private_);
1918         FLAC__ASSERT(0 != encoder->protected_);
1919         return encoder->protected_->do_escape_coding;
1920 }
1921
1922 FLAC_API FLAC__bool FLAC__stream_encoder_get_do_exhaustive_model_search(const FLAC__StreamEncoder *encoder)
1923 {
1924         FLAC__ASSERT(0 != encoder);
1925         FLAC__ASSERT(0 != encoder->private_);
1926         FLAC__ASSERT(0 != encoder->protected_);
1927         return encoder->protected_->do_exhaustive_model_search;
1928 }
1929
1930 FLAC_API unsigned FLAC__stream_encoder_get_min_residual_partition_order(const FLAC__StreamEncoder *encoder)
1931 {
1932         FLAC__ASSERT(0 != encoder);
1933         FLAC__ASSERT(0 != encoder->private_);
1934         FLAC__ASSERT(0 != encoder->protected_);
1935         return encoder->protected_->min_residual_partition_order;
1936 }
1937
1938 FLAC_API unsigned FLAC__stream_encoder_get_max_residual_partition_order(const FLAC__StreamEncoder *encoder)
1939 {
1940         FLAC__ASSERT(0 != encoder);
1941         FLAC__ASSERT(0 != encoder->private_);
1942         FLAC__ASSERT(0 != encoder->protected_);
1943         return encoder->protected_->max_residual_partition_order;
1944 }
1945
1946 FLAC_API unsigned FLAC__stream_encoder_get_rice_parameter_search_dist(const FLAC__StreamEncoder *encoder)
1947 {
1948         FLAC__ASSERT(0 != encoder);
1949         FLAC__ASSERT(0 != encoder->private_);
1950         FLAC__ASSERT(0 != encoder->protected_);
1951         return encoder->protected_->rice_parameter_search_dist;
1952 }
1953
1954 FLAC_API FLAC__uint64 FLAC__stream_encoder_get_total_samples_estimate(const FLAC__StreamEncoder *encoder)
1955 {
1956         FLAC__ASSERT(0 != encoder);
1957         FLAC__ASSERT(0 != encoder->private_);
1958         FLAC__ASSERT(0 != encoder->protected_);
1959         return encoder->protected_->total_samples_estimate;
1960 }
1961
1962 FLAC_API FLAC__bool FLAC__stream_encoder_process(FLAC__StreamEncoder *encoder, const FLAC__int32 * const buffer[], unsigned samples)
1963 {
1964         unsigned i, j, channel;
1965         FLAC__int32 x, mid, side;
1966         const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize;
1967
1968         FLAC__ASSERT(0 != encoder);
1969         FLAC__ASSERT(0 != encoder->private_);
1970         FLAC__ASSERT(0 != encoder->protected_);
1971         FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
1972
1973         j = 0;
1974         /*
1975          * we have several flavors of the same basic loop, optimized for
1976          * different conditions:
1977          */
1978         if(encoder->protected_->max_lpc_order > 0) {
1979                 if(encoder->protected_->do_mid_side_stereo && channels == 2) {
1980                         /*
1981                          * stereo coding: unroll channel loop
1982                          * with LPC: calculate floating point version of signal
1983                          */
1984                         do {
1985                                 if(encoder->protected_->verify)
1986                                         append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
1987
1988                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
1989                                         x = mid = side = buffer[0][j];
1990                                         encoder->private_->integer_signal[0][i] = x;
1991 #ifndef FLAC__INTEGER_ONLY_LIBRARY
1992                                         encoder->private_->real_signal[0][i] = (FLAC__real)x;
1993 #endif
1994                                         x = buffer[1][j];
1995                                         encoder->private_->integer_signal[1][i] = x;
1996 #ifndef FLAC__INTEGER_ONLY_LIBRARY
1997                                         encoder->private_->real_signal[1][i] = (FLAC__real)x;
1998 #endif
1999                                         mid += x;
2000                                         side -= x;
2001                                         mid >>= 1; /* NOTE: not the same as 'mid = (buffer[0][j] + buffer[1][j]) / 2' ! */
2002                                         encoder->private_->integer_signal_mid_side[1][i] = side;
2003                                         encoder->private_->integer_signal_mid_side[0][i] = mid;
2004 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2005                                         encoder->private_->real_signal_mid_side[1][i] = (FLAC__real)side;
2006                                         encoder->private_->real_signal_mid_side[0][i] = (FLAC__real)mid;
2007 #endif
2008                                         encoder->private_->current_sample_number++;
2009                                 }
2010                                 if(i == blocksize) {
2011                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2012                                                 return false;
2013                                 }
2014                         } while(j < samples);
2015                 }
2016                 else {
2017                         /*
2018                          * independent channel coding: buffer each channel in inner loop
2019                          * with LPC: calculate floating point version of signal
2020                          */
2021                         do {
2022                                 if(encoder->protected_->verify)
2023                                         append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2024
2025                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2026                                         for(channel = 0; channel < channels; channel++) {
2027                                                 x = buffer[channel][j];
2028                                                 encoder->private_->integer_signal[channel][i] = x;
2029 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2030                                                 encoder->private_->real_signal[channel][i] = (FLAC__real)x;
2031 #endif
2032                                         }
2033                                         encoder->private_->current_sample_number++;
2034                                 }
2035                                 if(i == blocksize) {
2036                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2037                                                 return false;
2038                                 }
2039                         } while(j < samples);
2040                 }
2041         }
2042         else {
2043                 if(encoder->protected_->do_mid_side_stereo && channels == 2) {
2044                         /*
2045                          * stereo coding: unroll channel loop
2046                          * without LPC: no need to calculate floating point version of signal
2047                          */
2048                         do {
2049                                 if(encoder->protected_->verify)
2050                                         append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2051
2052                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2053                                         encoder->private_->integer_signal[0][i] = mid = side = buffer[0][j];
2054                                         x = buffer[1][j];
2055                                         encoder->private_->integer_signal[1][i] = x;
2056                                         mid += x;
2057                                         side -= x;
2058                                         mid >>= 1; /* NOTE: not the same as 'mid = (buffer[0][j] + buffer[1][j]) / 2' ! */
2059                                         encoder->private_->integer_signal_mid_side[1][i] = side;
2060                                         encoder->private_->integer_signal_mid_side[0][i] = mid;
2061                                         encoder->private_->current_sample_number++;
2062                                 }
2063                                 if(i == blocksize) {
2064                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2065                                                 return false;
2066                                 }
2067                         } while(j < samples);
2068                 }
2069                 else {
2070                         /*
2071                          * independent channel coding: buffer each channel in inner loop
2072                          * without LPC: no need to calculate floating point version of signal
2073                          */
2074                         do {
2075                                 if(encoder->protected_->verify)
2076                                         append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2077
2078                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2079                                         for(channel = 0; channel < channels; channel++)
2080                                                 encoder->private_->integer_signal[channel][i] = buffer[channel][j];
2081                                         encoder->private_->current_sample_number++;
2082                                 }
2083                                 if(i == blocksize) {
2084                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2085                                                 return false;
2086                                 }
2087                         } while(j < samples);
2088                 }
2089         }
2090
2091         return true;
2092 }
2093
2094 FLAC_API FLAC__bool FLAC__stream_encoder_process_interleaved(FLAC__StreamEncoder *encoder, const FLAC__int32 buffer[], unsigned samples)
2095 {
2096         unsigned i, j, k, channel;
2097         FLAC__int32 x, mid, side;
2098         const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize;
2099
2100         FLAC__ASSERT(0 != encoder);
2101         FLAC__ASSERT(0 != encoder->private_);
2102         FLAC__ASSERT(0 != encoder->protected_);
2103         FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
2104
2105         j = k = 0;
2106         /*
2107          * we have several flavors of the same basic loop, optimized for
2108          * different conditions:
2109          */
2110         if(encoder->protected_->max_lpc_order > 0) {
2111                 if(encoder->protected_->do_mid_side_stereo && channels == 2) {
2112                         /*
2113                          * stereo coding: unroll channel loop
2114                          * with LPC: calculate floating point version of signal
2115                          */
2116                         do {
2117                                 if(encoder->protected_->verify)
2118                                         append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2119
2120                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2121                                         x = mid = side = buffer[k++];
2122                                         encoder->private_->integer_signal[0][i] = x;
2123 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2124                                         encoder->private_->real_signal[0][i] = (FLAC__real)x;
2125 #endif
2126                                         x = buffer[k++];
2127                                         encoder->private_->integer_signal[1][i] = x;
2128 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2129                                         encoder->private_->real_signal[1][i] = (FLAC__real)x;
2130 #endif
2131                                         mid += x;
2132                                         side -= x;
2133                                         mid >>= 1; /* NOTE: not the same as 'mid = (left + right) / 2' ! */
2134                                         encoder->private_->integer_signal_mid_side[1][i] = side;
2135                                         encoder->private_->integer_signal_mid_side[0][i] = mid;
2136 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2137                                         encoder->private_->real_signal_mid_side[1][i] = (FLAC__real)side;
2138                                         encoder->private_->real_signal_mid_side[0][i] = (FLAC__real)mid;
2139 #endif
2140                                         encoder->private_->current_sample_number++;
2141                                 }
2142                                 if(i == blocksize) {
2143                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2144                                                 return false;
2145                                 }
2146                         } while(j < samples);
2147                 }
2148                 else {
2149                         /*
2150                          * independent channel coding: buffer each channel in inner loop
2151                          * with LPC: calculate floating point version of signal
2152                          */
2153                         do {
2154                                 if(encoder->protected_->verify)
2155                                         append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2156
2157                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2158                                         for(channel = 0; channel < channels; channel++) {
2159                                                 x = buffer[k++];
2160                                                 encoder->private_->integer_signal[channel][i] = x;
2161 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2162                                                 encoder->private_->real_signal[channel][i] = (FLAC__real)x;
2163 #endif
2164                                         }
2165                                         encoder->private_->current_sample_number++;
2166                                 }
2167                                 if(i == blocksize) {
2168                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2169                                                 return false;
2170                                 }
2171                         } while(j < samples);
2172                 }
2173         }
2174         else {
2175                 if(encoder->protected_->do_mid_side_stereo && channels == 2) {
2176                         /*
2177                          * stereo coding: unroll channel loop
2178                          * without LPC: no need to calculate floating point version of signal
2179                          */
2180                         do {
2181                                 if(encoder->protected_->verify)
2182                                         append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2183
2184                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2185                                         encoder->private_->integer_signal[0][i] = mid = side = buffer[k++];
2186                                         x = buffer[k++];
2187                                         encoder->private_->integer_signal[1][i] = x;
2188                                         mid += x;
2189                                         side -= x;
2190                                         mid >>= 1; /* NOTE: not the same as 'mid = (left + right) / 2' ! */
2191                                         encoder->private_->integer_signal_mid_side[1][i] = side;
2192                                         encoder->private_->integer_signal_mid_side[0][i] = mid;
2193                                         encoder->private_->current_sample_number++;
2194                                 }
2195                                 if(i == blocksize) {
2196                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2197                                                 return false;
2198                                 }
2199                         } while(j < samples);
2200                 }
2201                 else {
2202                         /*
2203                          * independent channel coding: buffer each channel in inner loop
2204                          * without LPC: no need to calculate floating point version of signal
2205                          */
2206                         do {
2207                                 if(encoder->protected_->verify)
2208                                         append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j));
2209
2210                                 for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) {
2211                                         for(channel = 0; channel < channels; channel++)
2212                                                 encoder->private_->integer_signal[channel][i] = buffer[k++];
2213                                         encoder->private_->current_sample_number++;
2214                                 }
2215                                 if(i == blocksize) {
2216                                         if(!process_frame_(encoder, /*is_fractional_block=*/false))
2217                                                 return false;
2218                                 }
2219                         } while(j < samples);
2220                 }
2221         }
2222
2223         return true;
2224 }
2225
2226 /***********************************************************************
2227  *
2228  * Private class methods
2229  *
2230  ***********************************************************************/
2231
2232 void set_defaults_(FLAC__StreamEncoder *encoder)
2233 {
2234         FLAC__ASSERT(0 != encoder);
2235
2236 #ifdef FLAC__MANDATORY_VERIFY_WHILE_ENCODING
2237         encoder->protected_->verify = true;
2238 #else
2239         encoder->protected_->verify = false;
2240 #endif
2241         encoder->protected_->streamable_subset = true;
2242         encoder->protected_->do_mid_side_stereo = false;
2243         encoder->protected_->loose_mid_side_stereo = false;
2244         encoder->protected_->channels = 2;
2245         encoder->protected_->bits_per_sample = 16;
2246         encoder->protected_->sample_rate = 44100;
2247         encoder->protected_->blocksize = 0;
2248 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2249         encoder->protected_->num_apodizations = 1;
2250         encoder->protected_->apodizations[0].type = FLAC__APODIZATION_TUKEY;
2251         encoder->protected_->apodizations[0].parameters.tukey.p = 0.5;
2252 #endif
2253         encoder->protected_->max_lpc_order = 0;
2254         encoder->protected_->qlp_coeff_precision = 0;
2255         encoder->protected_->do_qlp_coeff_prec_search = false;
2256         encoder->protected_->do_exhaustive_model_search = false;
2257         encoder->protected_->do_escape_coding = false;
2258         encoder->protected_->min_residual_partition_order = 0;
2259         encoder->protected_->max_residual_partition_order = 0;
2260         encoder->protected_->rice_parameter_search_dist = 0;
2261         encoder->protected_->total_samples_estimate = 0;
2262         encoder->protected_->metadata = 0;
2263         encoder->protected_->num_metadata_blocks = 0;
2264
2265         encoder->private_->seek_table = 0;
2266         encoder->private_->disable_constant_subframes = false;
2267         encoder->private_->disable_fixed_subframes = false;
2268         encoder->private_->disable_verbatim_subframes = false;
2269 #if FLAC__HAS_OGG
2270         encoder->private_->is_ogg = false;
2271 #endif
2272         encoder->private_->read_callback = 0;
2273         encoder->private_->write_callback = 0;
2274         encoder->private_->seek_callback = 0;
2275         encoder->private_->tell_callback = 0;
2276         encoder->private_->metadata_callback = 0;
2277         encoder->private_->progress_callback = 0;
2278         encoder->private_->client_data = 0;
2279
2280 #if FLAC__HAS_OGG
2281         FLAC__ogg_encoder_aspect_set_defaults(&encoder->protected_->ogg_encoder_aspect);
2282 #endif
2283 }
2284
2285 void free_(FLAC__StreamEncoder *encoder)
2286 {
2287         unsigned i, channel;
2288
2289         FLAC__ASSERT(0 != encoder);
2290         for(i = 0; i < encoder->protected_->channels; i++) {
2291                 if(0 != encoder->private_->integer_signal_unaligned[i]) {
2292                         free(encoder->private_->integer_signal_unaligned[i]);
2293                         encoder->private_->integer_signal_unaligned[i] = 0;
2294                 }
2295 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2296                 if(0 != encoder->private_->real_signal_unaligned[i]) {
2297                         free(encoder->private_->real_signal_unaligned[i]);
2298                         encoder->private_->real_signal_unaligned[i] = 0;
2299                 }
2300 #endif
2301         }
2302         for(i = 0; i < 2; i++) {
2303                 if(0 != encoder->private_->integer_signal_mid_side_unaligned[i]) {
2304                         free(encoder->private_->integer_signal_mid_side_unaligned[i]);
2305                         encoder->private_->integer_signal_mid_side_unaligned[i] = 0;
2306                 }
2307 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2308                 if(0 != encoder->private_->real_signal_mid_side_unaligned[i]) {
2309                         free(encoder->private_->real_signal_mid_side_unaligned[i]);
2310                         encoder->private_->real_signal_mid_side_unaligned[i] = 0;
2311                 }
2312 #endif
2313         }
2314 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2315         for(i = 0; i < encoder->protected_->num_apodizations; i++) {
2316                 if(0 != encoder->private_->window_unaligned[i]) {
2317                         free(encoder->private_->window_unaligned[i]);
2318                         encoder->private_->window_unaligned[i] = 0;
2319                 }
2320         }
2321         if(0 != encoder->private_->windowed_signal_unaligned) {
2322                 free(encoder->private_->windowed_signal_unaligned);
2323                 encoder->private_->windowed_signal_unaligned = 0;
2324         }
2325 #endif
2326         for(channel = 0; channel < encoder->protected_->channels; channel++) {
2327                 for(i = 0; i < 2; i++) {
2328                         if(0 != encoder->private_->residual_workspace_unaligned[channel][i]) {
2329                                 free(encoder->private_->residual_workspace_unaligned[channel][i]);
2330                                 encoder->private_->residual_workspace_unaligned[channel][i] = 0;
2331                         }
2332                 }
2333         }
2334         for(channel = 0; channel < 2; channel++) {
2335                 for(i = 0; i < 2; i++) {
2336                         if(0 != encoder->private_->residual_workspace_mid_side_unaligned[channel][i]) {
2337                                 free(encoder->private_->residual_workspace_mid_side_unaligned[channel][i]);
2338                                 encoder->private_->residual_workspace_mid_side_unaligned[channel][i] = 0;
2339                         }
2340                 }
2341         }
2342         if(0 != encoder->private_->abs_residual_unaligned) {
2343                 free(encoder->private_->abs_residual_unaligned);
2344                 encoder->private_->abs_residual_unaligned = 0;
2345         }
2346         if(0 != encoder->private_->abs_residual_partition_sums_unaligned) {
2347                 free(encoder->private_->abs_residual_partition_sums_unaligned);
2348                 encoder->private_->abs_residual_partition_sums_unaligned = 0;
2349         }
2350         if(0 != encoder->private_->raw_bits_per_partition_unaligned) {
2351                 free(encoder->private_->raw_bits_per_partition_unaligned);
2352                 encoder->private_->raw_bits_per_partition_unaligned = 0;
2353         }
2354         if(encoder->protected_->verify) {
2355                 for(i = 0; i < encoder->protected_->channels; i++) {
2356                         if(0 != encoder->private_->verify.input_fifo.data[i]) {
2357                                 free(encoder->private_->verify.input_fifo.data[i]);
2358                                 encoder->private_->verify.input_fifo.data[i] = 0;
2359                         }
2360                 }
2361         }
2362         FLAC__bitbuffer_free(encoder->private_->frame);
2363 }
2364
2365 FLAC__bool resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_blocksize)
2366 {
2367         FLAC__bool ok;
2368         unsigned i, channel;
2369
2370         FLAC__ASSERT(new_blocksize > 0);
2371         FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
2372         FLAC__ASSERT(encoder->private_->current_sample_number == 0);
2373
2374         /* To avoid excessive malloc'ing, we only grow the buffer; no shrinking. */
2375         if(new_blocksize <= encoder->private_->input_capacity)
2376                 return true;
2377
2378         ok = true;
2379
2380         /* WATCHOUT: FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx()
2381          * requires that the input arrays (in our case the integer signals)
2382          * have a buffer of up to 3 zeroes in front (at negative indices) for
2383          * alignment purposes; we use 4 in front to keep the data well-aligned.
2384          */
2385
2386         for(i = 0; ok && i < encoder->protected_->channels; i++) {
2387                 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize+4, &encoder->private_->integer_signal_unaligned[i], &encoder->private_->integer_signal[i]);
2388                 memset(encoder->private_->integer_signal[i], 0, sizeof(FLAC__int32)*4);
2389                 encoder->private_->integer_signal[i] += 4;
2390 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2391                 if(encoder->protected_->max_lpc_order > 0)
2392                         ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize, &encoder->private_->real_signal_unaligned[i], &encoder->private_->real_signal[i]);
2393 #endif
2394         }
2395         for(i = 0; ok && i < 2; i++) {
2396                 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize+4, &encoder->private_->integer_signal_mid_side_unaligned[i], &encoder->private_->integer_signal_mid_side[i]);
2397                 memset(encoder->private_->integer_signal_mid_side[i], 0, sizeof(FLAC__int32)*4);
2398                 encoder->private_->integer_signal_mid_side[i] += 4;
2399 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2400                 if(encoder->protected_->max_lpc_order > 0)
2401                         ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize, &encoder->private_->real_signal_mid_side_unaligned[i], &encoder->private_->real_signal_mid_side[i]);
2402 #endif
2403         }
2404 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2405         if(ok && encoder->protected_->max_lpc_order > 0) {
2406                 for(i = 0; ok && i < encoder->protected_->num_apodizations; i++)
2407                         ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize, &encoder->private_->window_unaligned[i], &encoder->private_->window[i]);
2408                 ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize, &encoder->private_->windowed_signal_unaligned, &encoder->private_->windowed_signal);
2409         }
2410 #endif
2411         for(channel = 0; ok && channel < encoder->protected_->channels; channel++) {
2412                 for(i = 0; ok && i < 2; i++) {
2413                         ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize, &encoder->private_->residual_workspace_unaligned[channel][i], &encoder->private_->residual_workspace[channel][i]);
2414                 }
2415         }
2416         for(channel = 0; ok && channel < 2; channel++) {
2417                 for(i = 0; ok && i < 2; i++) {
2418                         ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize, &encoder->private_->residual_workspace_mid_side_unaligned[channel][i], &encoder->private_->residual_workspace_mid_side[channel][i]);
2419                 }
2420         }
2421         ok = ok && FLAC__memory_alloc_aligned_uint32_array(new_blocksize, &encoder->private_->abs_residual_unaligned, &encoder->private_->abs_residual);
2422         if(encoder->private_->precompute_partition_sums || encoder->protected_->do_escape_coding) /* we require precompute_partition_sums if do_escape_coding because of their intertwined nature */
2423                 ok = ok && FLAC__memory_alloc_aligned_uint64_array(new_blocksize * 2, &encoder->private_->abs_residual_partition_sums_unaligned, &encoder->private_->abs_residual_partition_sums);
2424         if(encoder->protected_->do_escape_coding)
2425                 ok = ok && FLAC__memory_alloc_aligned_unsigned_array(new_blocksize * 2, &encoder->private_->raw_bits_per_partition_unaligned, &encoder->private_->raw_bits_per_partition);
2426
2427         /* now adjust the windows if the blocksize has changed */
2428 #ifndef FLAC__INTEGER_ONLY_LIBRARY
2429         if(ok && new_blocksize != encoder->private_->input_capacity && encoder->protected_->max_lpc_order > 0) {
2430                 for(i = 0; ok && i < encoder->protected_->num_apodizations; i++) {
2431                         switch(encoder->protected_->apodizations[i].type) {
2432                                 case FLAC__APODIZATION_BARTLETT:
2433                                         FLAC__window_bartlett(encoder->private_->window[i], new_blocksize);
2434                                         break;
2435                                 case FLAC__APODIZATION_BARTLETT_HANN:
2436                                         FLAC__window_bartlett_hann(encoder->private_->window[i], new_blocksize);
2437                                         break;
2438                                 case FLAC__APODIZATION_BLACKMAN:
2439                                         FLAC__window_blackman(encoder->private_->window[i], new_blocksize);
2440                                         break;
2441                                 case FLAC__APODIZATION_BLACKMAN_HARRIS_4TERM_92DB_SIDELOBE:
2442                                         FLAC__window_blackman_harris_4term_92db_sidelobe(encoder->private_->window[i], new_blocksize);
2443                                         break;
2444                                 case FLAC__APODIZATION_CONNES:
2445                                         FLAC__window_connes(encoder->private_->window[i], new_blocksize);
2446                                         break;
2447                                 case FLAC__APODIZATION_FLATTOP:
2448                                         FLAC__window_flattop(encoder->private_->window[i], new_blocksize);
2449                                         break;
2450                                 case FLAC__APODIZATION_GAUSS:
2451                                         FLAC__window_gauss(encoder->private_->window[i], new_blocksize, encoder->protected_->apodizations[i].parameters.gauss.stddev);
2452                                         break;
2453                                 case FLAC__APODIZATION_HAMMING:
2454                                         FLAC__window_hamming(encoder->private_->window[i], new_blocksize);
2455                                         break;
2456                                 case FLAC__APODIZATION_HANN:
2457                                         FLAC__window_hann(encoder->private_->window[i], new_blocksize);
2458                                         break;
2459                                 case FLAC__APODIZATION_KAISER_BESSEL:
2460                                         FLAC__window_kaiser_bessel(encoder->private_->window[i], new_blocksize);
2461                                         break;
2462                                 case FLAC__APODIZATION_NUTTALL:
2463                                         FLAC__window_nuttall(encoder->private_->window[i], new_blocksize);
2464                                         break;
2465                                 case FLAC__APODIZATION_RECTANGLE:
2466                                         FLAC__window_rectangle(encoder->private_->window[i], new_blocksize);
2467                                         break;
2468                                 case FLAC__APODIZATION_TRIANGLE:
2469                                         FLAC__window_triangle(encoder->private_->window[i], new_blocksize);
2470                                         break;
2471                                 case FLAC__APODIZATION_TUKEY:
2472                                         FLAC__window_tukey(encoder->private_->window[i], new_blocksize, encoder->protected_->apodizations[i].parameters.tukey.p);
2473                                         break;
2474                                 case FLAC__APODIZATION_WELCH:
2475                                         FLAC__window_welch(encoder->private_->window[i], new_blocksize);
2476                                         break;
2477                                 default:
2478                                         FLAC__ASSERT(0);
2479                                         /* double protection */
2480                                         FLAC__window_hann(encoder->private_->window[i], new_blocksize);
2481                                         break;
2482                         }
2483                 }
2484         }
2485 #endif
2486
2487         if(ok)
2488                 encoder->private_->input_capacity = new_blocksize;
2489         else
2490                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
2491
2492         return ok;
2493 }
2494
2495 FLAC__bool write_bitbuffer_(FLAC__StreamEncoder *encoder, unsigned samples)
2496 {
2497         const FLAC__byte *buffer;
2498         size_t bytes;
2499
2500         FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(encoder->private_->frame));
2501
2502         FLAC__bitbuffer_get_buffer(encoder->private_->frame, &buffer, &bytes);
2503
2504         if(encoder->protected_->verify) {
2505                 encoder->private_->verify.output.data = buffer;
2506                 encoder->private_->verify.output.bytes = bytes;
2507                 if(encoder->private_->verify.state_hint == ENCODER_IN_MAGIC) {
2508                         encoder->private_->verify.needs_magic_hack = true;
2509                 }
2510                 else {
2511                         if(!FLAC__stream_decoder_process_single(encoder->private_->verify.decoder)) {
2512                                 FLAC__bitbuffer_release_buffer(encoder->private_->frame);
2513                                 if(encoder->protected_->state != FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA)
2514                                         encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR;
2515                                 return false;
2516                         }
2517                 }
2518         }
2519
2520         if(write_frame_(encoder, buffer, bytes, samples) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2521                 FLAC__bitbuffer_release_buffer(encoder->private_->frame);
2522                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2523                 return false;
2524         }
2525
2526         FLAC__bitbuffer_release_buffer(encoder->private_->frame);
2527
2528         if(samples > 0) {
2529                 encoder->private_->streaminfo.data.stream_info.min_framesize = min(bytes, encoder->private_->streaminfo.data.stream_info.min_framesize);
2530                 encoder->private_->streaminfo.data.stream_info.max_framesize = max(bytes, encoder->private_->streaminfo.data.stream_info.max_framesize);
2531         }
2532
2533         return true;
2534 }
2535
2536 FLAC__StreamEncoderWriteStatus write_frame_(FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples)
2537 {
2538         FLAC__StreamEncoderWriteStatus status;
2539         FLAC__uint64 output_position = 0;
2540
2541         /* FLAC__STREAM_ENCODER_TELL_STATUS_UNSUPPORTED just means we didn't get the offset; no error */
2542         if(encoder->private_->tell_callback && encoder->private_->tell_callback(encoder, &output_position, encoder->private_->client_data) == FLAC__STREAM_ENCODER_TELL_STATUS_ERROR) {
2543                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2544                 return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR;
2545         }
2546
2547         /*
2548          * Watch for the STREAMINFO block and first SEEKTABLE block to go by and store their offsets.
2549          */
2550         if(samples == 0) {
2551                 FLAC__MetadataType type = (buffer[0] & 0x7f);
2552                 if(type == FLAC__METADATA_TYPE_STREAMINFO)
2553                         encoder->protected_->streaminfo_offset = output_position;
2554                 else if(type == FLAC__METADATA_TYPE_SEEKTABLE && encoder->protected_->seektable_offset == 0)
2555                         encoder->protected_->seektable_offset = output_position;
2556         }
2557
2558         /*
2559          * Mark the current seek point if hit (if audio_offset == 0 that
2560          * means we're still writing metadata and haven't hit the first
2561          * frame yet)
2562          */
2563         if(0 != encoder->private_->seek_table && encoder->protected_->audio_offset > 0 && encoder->private_->seek_table->num_points > 0) {
2564                 const unsigned blocksize = FLAC__stream_encoder_get_blocksize(encoder);
2565                 const FLAC__uint64 frame_first_sample = encoder->private_->samples_written;
2566                 const FLAC__uint64 frame_last_sample = frame_first_sample + (FLAC__uint64)blocksize - 1;
2567                 FLAC__uint64 test_sample;
2568                 unsigned i;
2569                 for(i = encoder->private_->first_seekpoint_to_check; i < encoder->private_->seek_table->num_points; i++) {
2570                         test_sample = encoder->private_->seek_table->points[i].sample_number;
2571                         if(test_sample > frame_last_sample) {
2572                                 break;
2573                         }
2574                         else if(test_sample >= frame_first_sample) {
2575                                 encoder->private_->seek_table->points[i].sample_number = frame_first_sample;
2576                                 encoder->private_->seek_table->points[i].stream_offset = output_position - encoder->protected_->audio_offset;
2577                                 encoder->private_->seek_table->points[i].frame_samples = blocksize;
2578                                 encoder->private_->first_seekpoint_to_check++;
2579                                 /* DO NOT: "break;" and here's why:
2580                                  * The seektable template may contain more than one target
2581                                  * sample for any given frame; we will keep looping, generating
2582                                  * duplicate seekpoints for them, and we'll clean it up later,
2583                                  * just before writing the seektable back to the metadata.
2584                                  */
2585                         }
2586                         else {
2587                                 encoder->private_->first_seekpoint_to_check++;
2588                         }
2589                 }
2590         }
2591
2592 #if FLAC__HAS_OGG
2593         if(encoder->private_->is_ogg) {
2594                 status = FLAC__ogg_encoder_aspect_write_callback_wrapper(
2595                         &encoder->protected_->ogg_encoder_aspect,
2596                         FLAC__stream_encoder_get_total_samples_estimate(encoder),
2597                         buffer,
2598                         bytes,
2599                         samples,
2600                         encoder->private_->current_frame_number,
2601                         (FLAC__OggEncoderAspectWriteCallbackProxy)encoder->private_->write_callback,
2602                         encoder,
2603                         encoder->private_->client_data
2604                 );
2605         }
2606         else
2607 #endif
2608         status = encoder->private_->write_callback(encoder, buffer, bytes, samples, encoder->private_->current_frame_number, encoder->private_->client_data);
2609
2610         if(status == FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2611                 encoder->private_->bytes_written += bytes;
2612                 encoder->private_->samples_written += samples;
2613                 /* we keep a high watermark on the number of frames written because
2614                  * when the encoder goes back to write metadata, 'current_frame'
2615                  * will drop back to 0.
2616                  */
2617                 encoder->private_->frames_written = max(encoder->private_->frames_written, encoder->private_->current_frame_number+1);
2618         }
2619         else
2620                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2621
2622         return status;
2623 }
2624
2625 /* Gets called when the encoding process has finished so that we can update the STREAMINFO and SEEKTABLE blocks.  */
2626 void update_metadata_(const FLAC__StreamEncoder *encoder)
2627 {
2628         FLAC__byte b[max(6, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)];
2629         const FLAC__StreamMetadata *metadata = &encoder->private_->streaminfo;
2630         const FLAC__uint64 samples = metadata->data.stream_info.total_samples;
2631         const unsigned min_framesize = metadata->data.stream_info.min_framesize;
2632         const unsigned max_framesize = metadata->data.stream_info.max_framesize;
2633         const unsigned bps = metadata->data.stream_info.bits_per_sample;
2634         FLAC__StreamEncoderSeekStatus seek_status;
2635
2636         FLAC__ASSERT(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
2637
2638         /* All this is based on intimate knowledge of the stream header
2639          * layout, but a change to the header format that would break this
2640          * would also break all streams encoded in the previous format.
2641          */
2642
2643         /*
2644          * Write MD5 signature
2645          */
2646         {
2647                 const unsigned md5_offset =
2648                         FLAC__STREAM_METADATA_HEADER_LENGTH +
2649                         (
2650                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
2651                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
2652                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
2653                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
2654                                 FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
2655                                 FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
2656                                 FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN +
2657                                 FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN
2658                         ) / 8;
2659
2660                 if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->streaminfo_offset + md5_offset, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) {
2661                         if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR)
2662                                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2663                         return;
2664                 }
2665                 if(encoder->private_->write_callback(encoder, metadata->data.stream_info.md5sum, 16, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2666                         encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2667                         return;
2668                 }
2669         }
2670
2671         /*
2672          * Write total samples
2673          */
2674         {
2675                 const unsigned total_samples_byte_offset =
2676                         FLAC__STREAM_METADATA_HEADER_LENGTH +
2677                         (
2678                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
2679                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
2680                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
2681                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
2682                                 FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
2683                                 FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
2684                                 FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN
2685                                 - 4
2686                         ) / 8;
2687
2688                 b[0] = ((FLAC__byte)(bps-1) << 4) | (FLAC__byte)((samples >> 32) & 0x0F);
2689                 b[1] = (FLAC__byte)((samples >> 24) & 0xFF);
2690                 b[2] = (FLAC__byte)((samples >> 16) & 0xFF);
2691                 b[3] = (FLAC__byte)((samples >> 8) & 0xFF);
2692                 b[4] = (FLAC__byte)(samples & 0xFF);
2693                 if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->streaminfo_offset + total_samples_byte_offset, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) {
2694                         if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR)
2695                                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2696                         return;
2697                 }
2698                 if(encoder->private_->write_callback(encoder, b, 5, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2699                         encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2700                         return;
2701                 }
2702         }
2703
2704         /*
2705          * Write min/max framesize
2706          */
2707         {
2708                 const unsigned min_framesize_offset =
2709                         FLAC__STREAM_METADATA_HEADER_LENGTH +
2710                         (
2711                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
2712                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN
2713                         ) / 8;
2714
2715                 b[0] = (FLAC__byte)((min_framesize >> 16) & 0xFF);
2716                 b[1] = (FLAC__byte)((min_framesize >> 8) & 0xFF);
2717                 b[2] = (FLAC__byte)(min_framesize & 0xFF);
2718                 b[3] = (FLAC__byte)((max_framesize >> 16) & 0xFF);
2719                 b[4] = (FLAC__byte)((max_framesize >> 8) & 0xFF);
2720                 b[5] = (FLAC__byte)(max_framesize & 0xFF);
2721                 if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->streaminfo_offset + min_framesize_offset, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) {
2722                         if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR)
2723                                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2724                         return;
2725                 }
2726                 if(encoder->private_->write_callback(encoder, b, 6, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2727                         encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2728                         return;
2729                 }
2730         }
2731
2732         /*
2733          * Write seektable
2734          */
2735         if(0 != encoder->private_->seek_table && encoder->private_->seek_table->num_points > 0 && encoder->protected_->seektable_offset > 0) {
2736                 unsigned i;
2737
2738                 FLAC__format_seektable_sort(encoder->private_->seek_table);
2739
2740                 FLAC__ASSERT(FLAC__format_seektable_is_legal(encoder->private_->seek_table));
2741
2742                 if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->seektable_offset + FLAC__STREAM_METADATA_HEADER_LENGTH, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) {
2743                         if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR)
2744                                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2745                         return;
2746                 }
2747
2748                 for(i = 0; i < encoder->private_->seek_table->num_points; i++) {
2749                         FLAC__uint64 xx;
2750                         unsigned x;
2751                         xx = encoder->private_->seek_table->points[i].sample_number;
2752                         b[7] = (FLAC__byte)xx; xx >>= 8;
2753                         b[6] = (FLAC__byte)xx; xx >>= 8;
2754                         b[5] = (FLAC__byte)xx; xx >>= 8;
2755                         b[4] = (FLAC__byte)xx; xx >>= 8;
2756                         b[3] = (FLAC__byte)xx; xx >>= 8;
2757                         b[2] = (FLAC__byte)xx; xx >>= 8;
2758                         b[1] = (FLAC__byte)xx; xx >>= 8;
2759                         b[0] = (FLAC__byte)xx; xx >>= 8;
2760                         xx = encoder->private_->seek_table->points[i].stream_offset;
2761                         b[15] = (FLAC__byte)xx; xx >>= 8;
2762                         b[14] = (FLAC__byte)xx; xx >>= 8;
2763                         b[13] = (FLAC__byte)xx; xx >>= 8;
2764                         b[12] = (FLAC__byte)xx; xx >>= 8;
2765                         b[11] = (FLAC__byte)xx; xx >>= 8;
2766                         b[10] = (FLAC__byte)xx; xx >>= 8;
2767                         b[9] = (FLAC__byte)xx; xx >>= 8;
2768                         b[8] = (FLAC__byte)xx; xx >>= 8;
2769                         x = encoder->private_->seek_table->points[i].frame_samples;
2770                         b[17] = (FLAC__byte)x; x >>= 8;
2771                         b[16] = (FLAC__byte)x; x >>= 8;
2772                         if(encoder->private_->write_callback(encoder, b, 18, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2773                                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2774                                 return;
2775                         }
2776                 }
2777         }
2778 }
2779
2780 #if FLAC__HAS_OGG
2781 /* Gets called when the encoding process has finished so that we can update the STREAMINFO and SEEKTABLE blocks.  */
2782 void update_ogg_metadata_(FLAC__StreamEncoder *encoder)
2783 {
2784         FLAC__byte b[max(6, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)];
2785         const FLAC__StreamMetadata *metadata = &encoder->private_->streaminfo;
2786         const FLAC__uint64 samples = metadata->data.stream_info.total_samples;
2787         const unsigned min_framesize = metadata->data.stream_info.min_framesize;
2788         const unsigned max_framesize = metadata->data.stream_info.max_framesize;
2789         ogg_page page;
2790
2791         FLAC__ASSERT(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
2792
2793         /* All this is based on intimate knowledge of the stream header
2794          * layout, but a change to the header format that would break this
2795          * would also break all streams encoded in the previous format.
2796          */
2797
2798         /**
2799          ** Write STREAMINFO stats
2800          **/
2801         simple_ogg_page__init(&page);
2802         if(!simple_ogg_page__get_at(encoder, encoder->protected_->streaminfo_offset, &page, encoder->private_->seek_callback, encoder->private_->read_callback, encoder->private_->client_data)) {
2803                 simple_ogg_page__clear(&page);
2804                 return; /* state already set */
2805         }
2806
2807         /*
2808          * Write MD5 signature
2809          */
2810         {
2811                 const unsigned md5_offset =
2812                         FLAC__STREAM_METADATA_HEADER_LENGTH +
2813                         (
2814                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
2815                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
2816                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
2817                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
2818                                 FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
2819                                 FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
2820                                 FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN +
2821                                 FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN
2822                         ) / 8;
2823
2824                 if(md5_offset + 16 > (unsigned)page.body_len) {
2825                         encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
2826                         simple_ogg_page__clear(&page);
2827                         return;
2828                 }
2829                 memcpy(page.body + md5_offset, metadata->data.stream_info.md5sum, 16);
2830         }
2831
2832         /*
2833          * Write total samples
2834          */
2835         {
2836                 const unsigned total_samples_byte_offset =
2837                         FLAC__STREAM_METADATA_HEADER_LENGTH +
2838                         (
2839                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
2840                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN +
2841                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN +
2842                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN +
2843                                 FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN +
2844                                 FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN +
2845                                 FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN
2846                                 - 4
2847                         ) / 8;
2848
2849                 if(total_samples_byte_offset + 5 > (unsigned)page.body_len) {
2850                         encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
2851                         simple_ogg_page__clear(&page);
2852                         return;
2853                 }
2854                 b[0] = (FLAC__byte)page.body[total_samples_byte_offset] & 0xF0;
2855                 b[0] |= (FLAC__byte)((samples >> 32) & 0x0F);
2856                 b[1] = (FLAC__byte)((samples >> 24) & 0xFF);
2857                 b[2] = (FLAC__byte)((samples >> 16) & 0xFF);
2858                 b[3] = (FLAC__byte)((samples >> 8) & 0xFF);
2859                 b[4] = (FLAC__byte)(samples & 0xFF);
2860                 memcpy(page.body + total_samples_byte_offset, b, 5);
2861         }
2862
2863         /*
2864          * Write min/max framesize
2865          */
2866         {
2867                 const unsigned min_framesize_offset =
2868                         FLAC__STREAM_METADATA_HEADER_LENGTH +
2869                         (
2870                                 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN +
2871                                 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN
2872                         ) / 8;
2873
2874                 if(min_framesize_offset + 6 > (unsigned)page.body_len) {
2875                         encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
2876                         simple_ogg_page__clear(&page);
2877                         return;
2878                 }
2879                 b[0] = (FLAC__byte)((min_framesize >> 16) & 0xFF);
2880                 b[1] = (FLAC__byte)((min_framesize >> 8) & 0xFF);
2881                 b[2] = (FLAC__byte)(min_framesize & 0xFF);
2882                 b[3] = (FLAC__byte)((max_framesize >> 16) & 0xFF);
2883                 b[4] = (FLAC__byte)((max_framesize >> 8) & 0xFF);
2884                 b[5] = (FLAC__byte)(max_framesize & 0xFF);
2885                 memcpy(page.body + min_framesize_offset, b, 6);
2886         }
2887         if(!simple_ogg_page__set_at(encoder, encoder->protected_->streaminfo_offset, &page, encoder->private_->seek_callback, encoder->private_->write_callback, encoder->private_->client_data)) {
2888                 simple_ogg_page__clear(&page);
2889                 return; /* state already set */
2890         }
2891         simple_ogg_page__clear(&page);
2892
2893         /*
2894          * Write seektable
2895          */
2896         if(0 != encoder->private_->seek_table && encoder->private_->seek_table->num_points > 0 && encoder->protected_->seektable_offset > 0) {
2897                 unsigned i;
2898                 FLAC__byte *p;
2899
2900                 FLAC__format_seektable_sort(encoder->private_->seek_table);
2901
2902                 FLAC__ASSERT(FLAC__format_seektable_is_legal(encoder->private_->seek_table));
2903
2904                 simple_ogg_page__init(&page);
2905                 if(!simple_ogg_page__get_at(encoder, encoder->protected_->seektable_offset, &page, encoder->private_->seek_callback, encoder->private_->read_callback, encoder->private_->client_data)) {
2906                         simple_ogg_page__clear(&page);
2907                         return; /* state already set */
2908                 }
2909
2910                 if(FLAC__STREAM_METADATA_HEADER_LENGTH + (18*encoder->private_->seek_table->num_points) > (unsigned)page.body_len) {
2911                         encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR;
2912                         simple_ogg_page__clear(&page);
2913                         return;
2914                 }
2915
2916                 for(i = 0, p = page.body + FLAC__STREAM_METADATA_HEADER_LENGTH; i < encoder->private_->seek_table->num_points; i++, p += 18) {
2917                         FLAC__uint64 xx;
2918                         unsigned x;
2919                         xx = encoder->private_->seek_table->points[i].sample_number;
2920                         b[7] = (FLAC__byte)xx; xx >>= 8;
2921                         b[6] = (FLAC__byte)xx; xx >>= 8;
2922                         b[5] = (FLAC__byte)xx; xx >>= 8;
2923                         b[4] = (FLAC__byte)xx; xx >>= 8;
2924                         b[3] = (FLAC__byte)xx; xx >>= 8;
2925                         b[2] = (FLAC__byte)xx; xx >>= 8;
2926                         b[1] = (FLAC__byte)xx; xx >>= 8;
2927                         b[0] = (FLAC__byte)xx; xx >>= 8;
2928                         xx = encoder->private_->seek_table->points[i].stream_offset;
2929                         b[15] = (FLAC__byte)xx; xx >>= 8;
2930                         b[14] = (FLAC__byte)xx; xx >>= 8;
2931                         b[13] = (FLAC__byte)xx; xx >>= 8;
2932                         b[12] = (FLAC__byte)xx; xx >>= 8;
2933                         b[11] = (FLAC__byte)xx; xx >>= 8;
2934                         b[10] = (FLAC__byte)xx; xx >>= 8;
2935                         b[9] = (FLAC__byte)xx; xx >>= 8;
2936                         b[8] = (FLAC__byte)xx; xx >>= 8;
2937                         x = encoder->private_->seek_table->points[i].frame_samples;
2938                         b[17] = (FLAC__byte)x; x >>= 8;
2939                         b[16] = (FLAC__byte)x; x >>= 8;
2940                         if(encoder->private_->write_callback(encoder, b, 18, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) {
2941                                 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR;
2942                                 simple_ogg_page__clear(&page);
2943                                 return;
2944                         }
2945                         memcpy(p, b, 18);
2946                 }
2947
2948                 if(!simple_ogg_page__set_at(encoder, encoder->protected_->seektable_offset, &page, encoder->private_->seek_callback, encoder->private_->write_callback, encoder->private_->client_data)) {
2949                         simple_ogg_page__clear(&page);
2950                         return; /* state already set */
2951                 }
2952                 simple_ogg_page__clear(&page);
2953         }
2954 }
2955 #endif
2956
2957 FLAC__bool process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block)
2958 {
2959         FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK);
2960
2961         /*
2962          * Accumulate raw signal to the MD5 signature
2963          */
2964         if(!FLAC__MD5Accumulate(&encoder->private_->md5context, (const FLAC__int32 * const *)encoder->private_->integer_signal, encoder->protected_->channels, encoder->protected_->blocksize, (encoder->protected_->bits_per_sample+7) / 8)) {
2965                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
2966                 return false;
2967         }
2968
2969         /*
2970          * Process the frame header and subframes into the frame bitbuffer
2971          */
2972         if(!process_subframes_(encoder, is_fractional_block)) {
2973                 /* the above function sets the state for us in case of an error */
2974                 return false;
2975         }
2976
2977         /*
2978          * Zero-pad the frame to a byte_boundary
2979          */
2980         if(!FLAC__bitbuffer_zero_pad_to_byte_boundary(encoder->private_->frame)) {
2981                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
2982                 return false;
2983         }
2984
2985         /*
2986          * CRC-16 the whole thing
2987          */
2988         FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(encoder->private_->frame));
2989         FLAC__bitbuffer_write_raw_uint32(encoder->private_->frame, FLAC__bitbuffer_get_write_crc16(encoder->private_->frame), FLAC__FRAME_FOOTER_CRC_LEN);
2990
2991         /*
2992          * Write it
2993          */
2994         if(!write_bitbuffer_(encoder, encoder->protected_->blocksize)) {
2995                 /* the above function sets the state for us in case of an error */
2996                 return false;
2997         }
2998
2999         /*
3000          * Get ready for the next frame
3001          */
3002         encoder->private_->current_sample_number = 0;
3003         encoder->private_->current_frame_number++;
3004         encoder->private_->streaminfo.data.stream_info.total_samples += (FLAC__uint64)encoder->protected_->blocksize;
3005
3006         return true;
3007 }
3008
3009 FLAC__bool process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block)
3010 {
3011         FLAC__FrameHeader frame_header;
3012         unsigned channel, min_partition_order = encoder->protected_->min_residual_partition_order, max_partition_order;
3013         FLAC__bool do_independent, do_mid_side, precompute_partition_sums;
3014
3015         /*
3016          * Calculate the min,max Rice partition orders
3017          */
3018         if(is_fractional_block) {
3019                 max_partition_order = 0;
3020         }
3021         else {
3022                 max_partition_order = FLAC__format_get_max_rice_partition_order_from_blocksize(encoder->protected_->blocksize);
3023                 max_partition_order = min(max_partition_order, encoder->protected_->max_residual_partition_order);
3024         }
3025         min_partition_order = min(min_partition_order, max_partition_order);
3026
3027         precompute_partition_sums = encoder->private_->precompute_partition_sums && ((max_partition_order > min_partition_order) || encoder->protected_->do_escape_coding);
3028
3029         /*
3030          * Setup the frame
3031          */
3032         if(!FLAC__bitbuffer_clear(encoder->private_->frame)) {
3033                 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR;
3034                 return false;
3035         }
3036         frame_header.blocksize = encoder->protected_->blocksize;
3037         frame_header.sample_rate = encoder->protected_->sample_rate;
3038         frame_header.channels = encoder->protected_->channels;
3039         frame_header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT; /* the default unless the encoder determines otherwise */
3040         frame_header.bits_per_sample = encoder->protected_->bits_per_sample;
3041         frame_header.number_type = FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER;
3042         frame_header.number.frame_number = encoder->private_->current_frame_number;
3043
3044         /*
3045          * Figure out what channel assignments to try
3046          */
3047         if(encoder->protected_->do_mid_side_stereo) {
3048                 if(encoder->protected_->loose_mid_side_stereo) {
3049                         if(encoder->private_->loose_mid_side_stereo_frame_count == 0) {
3050                                 do_independent = true;
3051                                 do_mid_side = true;
3052                         }
3053                         else {
3054                                 do_independent = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT);
3055                                 do_mid_side = !do_independent;
3056                         }
3057                 }
3058                 else {
3059                         do_independent = true;
3060                         do_mid_side = true;
3061                 }
3062         }
3063         else {
3064                 do_independent = true;
3065                 do_mid_side = false;
3066         }
3067
3068         FLAC__ASSERT(do_independent || do_mid_side);
3069
3070         /*
3071          * Check for wasted bits; set effective bps for each subframe
3072          */
3073         if(do_independent) {
3074                 for(channel = 0; channel < encoder->protected_->channels; channel++) {
3075                         const unsigned w = get_wasted_bits_(encoder->private_->integer_signal[channel], encoder->protected_->blocksize);
3076                         encoder->private_->subframe_workspace[channel][0].wasted_bits = encoder->private_->subframe_workspace[channel][1].wasted_bits = w;
3077                         encoder->private_->subframe_bps[channel] = encoder->protected_->bits_per_sample - w;
3078                 }
3079         }
3080         if(do_mid_side) {
3081                 FLAC__ASSERT(encoder->protected_->channels == 2);
3082                 for(channel = 0; channel < 2; channel++) {
3083                         const unsigned w = get_wasted_bits_(encoder->private_->integer_signal_mid_side[channel], encoder->protected_->blocksize);
3084                         encoder->private_->subframe_workspace_mid_side[channel][0].wasted_bits = encoder->private_->subframe_workspace_mid_side[channel][1].wasted_bits = w;
3085                         encoder->private_->subframe_bps_mid_side[channel] = encoder->protected_->bits_per_sample - w + (channel==0? 0:1);
3086                 }
3087         }
3088
3089         /*
3090          * First do a normal encoding pass of each independent channel
3091          */
3092         if(do_independent) {
3093                 for(channel = 0; channel < encoder->protected_->channels; channel++) {
3094                         if(!
3095                                 process_subframe_(
3096                                         encoder,
3097                                         min_partition_order,
3098                                         max_partition_order,
3099                                         precompute_partition_sums,
3100                                         &frame_header,
3101                                         encoder->private_->subframe_bps[channel],
3102                                         encoder->private_->integer_signal[channel],
3103 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3104                                         encoder->private_->real_signal[channel],
3105 #endif
3106                                         encoder->private_->subframe_workspace_ptr[channel],
3107                                         encoder->private_->partitioned_rice_contents_workspace_ptr[channel],
3108                                         encoder->private_->residual_workspace[channel],
3109                                         encoder->private_->best_subframe+channel,
3110                                         encoder->private_->best_subframe_bits+channel
3111                                 )
3112                         )
3113                                 return false;
3114                 }
3115         }
3116
3117         /*
3118          * Now do mid and side channels if requested
3119          */
3120         if(do_mid_side) {
3121                 FLAC__ASSERT(encoder->protected_->channels == 2);
3122
3123                 for(channel = 0; channel < 2; channel++) {
3124                         if(!
3125                                 process_subframe_(
3126                                         encoder,
3127                                         min_partition_order,
3128                                         max_partition_order,
3129                                         precompute_partition_sums,
3130                                         &frame_header,
3131                                         encoder->private_->subframe_bps_mid_side[channel],
3132                                         encoder->private_->integer_signal_mid_side[channel],
3133 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3134                                         encoder->private_->real_signal_mid_side[channel],
3135 #endif
3136                                         encoder->private_->subframe_workspace_ptr_mid_side[channel],
3137                                         encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[channel],
3138                                         encoder->private_->residual_workspace_mid_side[channel],
3139                                         encoder->private_->best_subframe_mid_side+channel,
3140                                         encoder->private_->best_subframe_bits_mid_side+channel
3141                                 )
3142                         )
3143                                 return false;
3144                 }
3145         }
3146
3147         /*
3148          * Compose the frame bitbuffer
3149          */
3150         if(do_mid_side) {
3151                 unsigned left_bps = 0, right_bps = 0; /* initialized only to prevent superfluous compiler warning */
3152                 FLAC__Subframe *left_subframe = 0, *right_subframe = 0; /* initialized only to prevent superfluous compiler warning */
3153                 FLAC__ChannelAssignment channel_assignment;
3154
3155                 FLAC__ASSERT(encoder->protected_->channels == 2);
3156
3157                 if(encoder->protected_->loose_mid_side_stereo && encoder->private_->loose_mid_side_stereo_frame_count > 0) {
3158                         channel_assignment = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT? FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT : FLAC__CHANNEL_ASSIGNMENT_MID_SIDE);
3159                 }
3160                 else {
3161                         unsigned bits[4]; /* WATCHOUT - indexed by FLAC__ChannelAssignment */
3162                         unsigned min_bits;
3163                         FLAC__ChannelAssignment ca;
3164
3165                         FLAC__ASSERT(do_independent && do_mid_side);
3166
3167                         /* We have to figure out which channel assignent results in the smallest frame */
3168                         bits[FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT] = encoder->private_->best_subframe_bits         [0] + encoder->private_->best_subframe_bits         [1];
3169                         bits[FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE  ] = encoder->private_->best_subframe_bits         [0] + encoder->private_->best_subframe_bits_mid_side[1];
3170                         bits[FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE ] = encoder->private_->best_subframe_bits         [1] + encoder->private_->best_subframe_bits_mid_side[1];
3171                         bits[FLAC__CHANNEL_ASSIGNMENT_MID_SIDE   ] = encoder->private_->best_subframe_bits_mid_side[0] + encoder->private_->best_subframe_bits_mid_side[1];
3172
3173                         for(channel_assignment = (FLAC__ChannelAssignment)0, min_bits = bits[0], ca = (FLAC__ChannelAssignment)1; (int)ca <= 3; ca = (FLAC__ChannelAssignment)((int)ca + 1)) {
3174                                 if(bits[ca] < min_bits) {
3175                                         min_bits = bits[ca];
3176                                         channel_assignment = ca;
3177                                 }
3178                         }
3179                 }
3180
3181                 frame_header.channel_assignment = channel_assignment;
3182
3183                 if(!FLAC__frame_add_header(&frame_header, encoder->private_->frame)) {
3184                         encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
3185                         return false;
3186                 }
3187
3188                 switch(channel_assignment) {
3189                         case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
3190                                 left_subframe  = &encoder->private_->subframe_workspace         [0][encoder->private_->best_subframe         [0]];
3191                                 right_subframe = &encoder->private_->subframe_workspace         [1][encoder->private_->best_subframe         [1]];
3192                                 break;
3193                         case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
3194                                 left_subframe  = &encoder->private_->subframe_workspace         [0][encoder->private_->best_subframe         [0]];
3195                                 right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
3196                                 break;
3197                         case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
3198                                 left_subframe  = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
3199                                 right_subframe = &encoder->private_->subframe_workspace         [1][encoder->private_->best_subframe         [1]];
3200                                 break;
3201                         case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
3202                                 left_subframe  = &encoder->private_->subframe_workspace_mid_side[0][encoder->private_->best_subframe_mid_side[0]];
3203                                 right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]];
3204                                 break;
3205                         default:
3206                                 FLAC__ASSERT(0);
3207                 }
3208
3209                 switch(channel_assignment) {
3210                         case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
3211                                 left_bps  = encoder->private_->subframe_bps         [0];
3212                                 right_bps = encoder->private_->subframe_bps         [1];
3213                                 break;
3214                         case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
3215                                 left_bps  = encoder->private_->subframe_bps         [0];
3216                                 right_bps = encoder->private_->subframe_bps_mid_side[1];
3217                                 break;
3218                         case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
3219                                 left_bps  = encoder->private_->subframe_bps_mid_side[1];
3220                                 right_bps = encoder->private_->subframe_bps         [1];
3221                                 break;
3222                         case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
3223                                 left_bps  = encoder->private_->subframe_bps_mid_side[0];
3224                                 right_bps = encoder->private_->subframe_bps_mid_side[1];
3225                                 break;
3226                         default:
3227                                 FLAC__ASSERT(0);
3228                 }
3229
3230                 /* note that encoder_add_subframe_ sets the state for us in case of an error */
3231                 if(!add_subframe_(encoder, &frame_header, left_bps , left_subframe , encoder->private_->frame))
3232                         return false;
3233                 if(!add_subframe_(encoder, &frame_header, right_bps, right_subframe, encoder->private_->frame))
3234                         return false;
3235         }
3236         else {
3237                 if(!FLAC__frame_add_header(&frame_header, encoder->private_->frame)) {
3238                         encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR;
3239                         return false;
3240                 }
3241
3242                 for(channel = 0; channel < encoder->protected_->channels; channel++) {
3243                         if(!add_subframe_(encoder, &frame_header, encoder->private_->subframe_bps[channel], &encoder->private_->subframe_workspace[channel][encoder->private_->best_subframe[channel]], encoder->private_->frame)) {
3244                                 /* the above function sets the state for us in case of an error */
3245                                 return false;
3246                         }
3247                 }
3248         }
3249
3250         if(encoder->protected_->loose_mid_side_stereo) {
3251                 encoder->private_->loose_mid_side_stereo_frame_count++;
3252                 if(encoder->private_->loose_mid_side_stereo_frame_count >= encoder->private_->loose_mid_side_stereo_frames)
3253                         encoder->private_->loose_mid_side_stereo_frame_count = 0;
3254         }
3255
3256         encoder->private_->last_channel_assignment = frame_header.channel_assignment;
3257
3258         return true;
3259 }
3260
3261 FLAC__bool process_subframe_(
3262         FLAC__StreamEncoder *encoder,
3263         unsigned min_partition_order,
3264         unsigned max_partition_order,
3265         FLAC__bool precompute_partition_sums,
3266         const FLAC__FrameHeader *frame_header,
3267         unsigned subframe_bps,
3268         const FLAC__int32 integer_signal[],
3269 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3270         const FLAC__real real_signal[],
3271 #endif
3272         FLAC__Subframe *subframe[2],
3273         FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents[2],
3274         FLAC__int32 *residual[2],
3275         unsigned *best_subframe,
3276         unsigned *best_bits
3277 )
3278 {
3279 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3280         FLAC__float fixed_residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1];
3281 #else
3282         FLAC__fixedpoint fixed_residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1];
3283 #endif
3284 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3285         FLAC__double lpc_residual_bits_per_sample;
3286         FLAC__real autoc[FLAC__MAX_LPC_ORDER+1]; /* WATCHOUT: the size is important even though encoder->protected_->max_lpc_order might be less; some asm routines need all the space */
3287         FLAC__double lpc_error[FLAC__MAX_LPC_ORDER];
3288         unsigned min_lpc_order, max_lpc_order, lpc_order;
3289         unsigned min_qlp_coeff_precision, max_qlp_coeff_precision, qlp_coeff_precision;
3290 #endif
3291         unsigned min_fixed_order, max_fixed_order, guess_fixed_order, fixed_order;
3292         unsigned rice_parameter;
3293         unsigned _candidate_bits, _best_bits;
3294         unsigned _best_subframe;
3295
3296         /* verbatim subframe is the baseline against which we measure other compressed subframes */
3297         _best_subframe = 0;
3298         if(encoder->private_->disable_verbatim_subframes && frame_header->blocksize >= FLAC__MAX_FIXED_ORDER)
3299                 _best_bits = UINT_MAX;
3300         else
3301                 _best_bits = evaluate_verbatim_subframe_(integer_signal, frame_header->blocksize, subframe_bps, subframe[_best_subframe]);
3302
3303         if(frame_header->blocksize >= FLAC__MAX_FIXED_ORDER) {
3304                 unsigned signal_is_constant = false;
3305                 guess_fixed_order = encoder->private_->local_fixed_compute_best_predictor(integer_signal+FLAC__MAX_FIXED_ORDER, frame_header->blocksize-FLAC__MAX_FIXED_ORDER, fixed_residual_bits_per_sample);
3306                 /* check for constant subframe */
3307                 if(
3308                         !encoder->private_->disable_constant_subframes &&
3309 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3310                         fixed_residual_bits_per_sample[1] == 0.0
3311 #else
3312                         fixed_residual_bits_per_sample[1] == FLAC__FP_ZERO
3313 #endif
3314                 ) {
3315                         /* the above means it's possible all samples are the same value; now double-check it: */
3316                         unsigned i;
3317                         signal_is_constant = true;
3318                         for(i = 1; i < frame_header->blocksize; i++) {
3319                                 if(integer_signal[0] != integer_signal[i]) {
3320                                         signal_is_constant = false;
3321                                         break;
3322                                 }
3323                         }
3324                 }
3325                 if(signal_is_constant) {
3326                         _candidate_bits = evaluate_constant_subframe_(integer_signal[0], subframe_bps, subframe[!_best_subframe]);
3327                         if(_candidate_bits < _best_bits) {
3328                                 _best_subframe = !_best_subframe;
3329                                 _best_bits = _candidate_bits;
3330                         }
3331                 }
3332                 else {
3333                         if(!encoder->private_->disable_fixed_subframes || (encoder->protected_->max_lpc_order == 0 && _best_bits == UINT_MAX)) {
3334                                 /* encode fixed */
3335                                 if(encoder->protected_->do_exhaustive_model_search) {
3336                                         min_fixed_order = 0;
3337                                         max_fixed_order = FLAC__MAX_FIXED_ORDER;
3338                                 }
3339                                 else {
3340                                         min_fixed_order = max_fixed_order = guess_fixed_order;
3341                                 }
3342                                 for(fixed_order = min_fixed_order; fixed_order <= max_fixed_order; fixed_order++) {
3343 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3344                                         if(fixed_residual_bits_per_sample[fixed_order] >= (FLAC__float)subframe_bps)
3345                                                 continue; /* don't even try */
3346                                         rice_parameter = (fixed_residual_bits_per_sample[fixed_order] > 0.0)? (unsigned)(fixed_residual_bits_per_sample[fixed_order]+0.5) : 0; /* 0.5 is for rounding */
3347 #else
3348                                         if(FLAC__fixedpoint_trunc(fixed_residual_bits_per_sample[fixed_order]) >= (int)subframe_bps)
3349                                                 continue; /* don't even try */
3350                                         rice_parameter = (fixed_residual_bits_per_sample[fixed_order] > FLAC__FP_ZERO)? (unsigned)FLAC__fixedpoint_trunc(fixed_residual_bits_per_sample[fixed_order]+FLAC__FP_ONE_HALF) : 0; /* 0.5 is for rounding */
3351 #endif
3352                                         rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */
3353                                         if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
3354 #ifdef DEBUG_VERBOSE
3355                                                 fprintf(stderr, "clipping rice_parameter (%u -> %u) @0\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
3356 #endif
3357                                                 rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
3358                                         }
3359                                         _candidate_bits =
3360                                                 evaluate_fixed_subframe_(
3361                                                         encoder,
3362                                                         integer_signal,
3363                                                         residual[!_best_subframe],
3364                                                         encoder->private_->abs_residual,
3365                                                         encoder->private_->abs_residual_partition_sums,
3366                                                         encoder->private_->raw_bits_per_partition,
3367                                                         frame_header->blocksize,
3368                                                         subframe_bps,
3369                                                         fixed_order,
3370                                                         rice_parameter,
3371                                                         min_partition_order,
3372                                                         max_partition_order,
3373                                                         precompute_partition_sums,
3374                                                         encoder->protected_->do_escape_coding,
3375                                                         encoder->protected_->rice_parameter_search_dist,
3376                                                         subframe[!_best_subframe],
3377                                                         partitioned_rice_contents[!_best_subframe]
3378                                                 );
3379                                         if(_candidate_bits < _best_bits) {
3380                                                 _best_subframe = !_best_subframe;
3381                                                 _best_bits = _candidate_bits;
3382                                         }
3383                                 }
3384                         }
3385
3386 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3387                         /* encode lpc */
3388                         if(encoder->protected_->max_lpc_order > 0) {
3389                                 if(encoder->protected_->max_lpc_order >= frame_header->blocksize)
3390                                         max_lpc_order = frame_header->blocksize-1;
3391                                 else
3392                                         max_lpc_order = encoder->protected_->max_lpc_order;
3393                                 if(max_lpc_order > 0) {
3394                                         unsigned a;
3395                                         for (a = 0; a < encoder->protected_->num_apodizations; a++) {
3396                                                 FLAC__lpc_window_data(real_signal, encoder->private_->window[a], encoder->private_->windowed_signal, frame_header->blocksize);
3397                                                 encoder->private_->local_lpc_compute_autocorrelation(encoder->private_->windowed_signal, frame_header->blocksize, max_lpc_order+1, autoc);
3398                                                 /* if autoc[0] == 0.0, the signal is constant and we usually won't get here, but it can happen */
3399                                                 if(autoc[0] != 0.0) {
3400                                                         FLAC__lpc_compute_lp_coefficients(autoc, max_lpc_order, encoder->private_->lp_coeff, lpc_error);
3401                                                         if(encoder->protected_->do_exhaustive_model_search) {
3402                                                                 min_lpc_order = 1;
3403                                                         }
3404                                                         else {
3405                                                                 const unsigned guess_lpc_order =
3406                                                                         FLAC__lpc_compute_best_order(
3407                                                                                 lpc_error,
3408                                                                                 max_lpc_order,
3409                                                                                 frame_header->blocksize,
3410                                                                                 subframe_bps + (
3411                                                                                         encoder->protected_->do_qlp_coeff_prec_search?
3412                                                                                                 FLAC__MIN_QLP_COEFF_PRECISION : /* have to guess; use the min possible size to avoid accidentally favoring lower orders */
3413                                                                                                 encoder->protected_->qlp_coeff_precision
3414                                                                                 )
3415                                                                         );
3416                                                                 min_lpc_order = max_lpc_order = guess_lpc_order;
3417                                                         }
3418                                                         for(lpc_order = min_lpc_order; lpc_order <= max_lpc_order; lpc_order++) {
3419                                                                 lpc_residual_bits_per_sample = FLAC__lpc_compute_expected_bits_per_residual_sample(lpc_error[lpc_order-1], frame_header->blocksize-lpc_order);
3420                                                                 if(lpc_residual_bits_per_sample >= (FLAC__double)subframe_bps)
3421                                                                         continue; /* don't even try */
3422                                                                 rice_parameter = (lpc_residual_bits_per_sample > 0.0)? (unsigned)(lpc_residual_bits_per_sample+0.5) : 0; /* 0.5 is for rounding */
3423                                                                 rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */
3424                                                                 if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
3425 #ifdef DEBUG_VERBOSE
3426                                                                         fprintf(stderr, "clipping rice_parameter (%u -> %u) @1\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1);
3427 #endif
3428                                                                         rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
3429                                                                 }
3430                                                                 if(encoder->protected_->do_qlp_coeff_prec_search) {
3431                                                                         min_qlp_coeff_precision = FLAC__MIN_QLP_COEFF_PRECISION;
3432                                                                         /* try to ensure a 32-bit datapath throughout for 16bps(+1bps for side channel) or less */
3433                                                                         if(subframe_bps <= 17) {
3434                                                                                 max_qlp_coeff_precision = min(32 - subframe_bps - lpc_order, FLAC__MAX_QLP_COEFF_PRECISION);
3435                                                                                 max_qlp_coeff_precision = max(max_qlp_coeff_precision, min_qlp_coeff_precision);
3436                                                                         }
3437                                                                         else
3438                                                                                 max_qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION;
3439                                                                 }
3440                                                                 else {
3441                                                                         min_qlp_coeff_precision = max_qlp_coeff_precision = encoder->protected_->qlp_coeff_precision;
3442                                                                 }
3443                                                                 for(qlp_coeff_precision = min_qlp_coeff_precision; qlp_coeff_precision <= max_qlp_coeff_precision; qlp_coeff_precision++) {
3444                                                                         _candidate_bits =
3445                                                                                 evaluate_lpc_subframe_(