add code for forcing the file mode for stdin/stdout to binary when needed
[flac.git] / src / flac / encode.c
1 /* flac - Command-line FLAC encoder/decoder
2  * Copyright (C) 2000,2001,2002  Josh Coalson
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * as published by the Free Software Foundation; either version 2
7  * of the License, or (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
17  */
18
19 #if defined _WIN32 && !defined __CYGWIN__
20 /* where MSVC puts unlink() */
21 # include <io.h>
22 #else
23 # include <unistd.h>
24 #endif
25 #include <math.h> /* for floor() */
26 #include <stdio.h> /* for FILE et al. */
27 #include <stdlib.h> /* for malloc */
28 #include <string.h> /* for strcmp() */
29 #include "FLAC/all.h"
30 #include "encode.h"
31 #include "file.h"
32 #ifdef FLAC__HAS_OGG
33 #include "ogg/ogg.h"
34 #endif
35
36 #ifdef min
37 #undef min
38 #endif
39 #define min(x,y) ((x)<(y)?(x):(y))
40
41 /* this MUST be >= 588 so that sector aligning can take place with one read */
42 #define CHUNK_OF_SAMPLES 2048
43
44 typedef enum {
45         FLAC__VERIFY_OK,
46         FLAC__VERIFY_FAILED_IN_FRAME,
47         FLAC__VERIFY_FAILED_IN_METADATA
48 } verify_code;
49
50 static const char *verify_code_string[] = {
51         "FLAC__VERIFY_OK",
52         "FLAC__VERIFY_FAILED_IN_FRAME",
53         "FLAC__VERIFY_FAILED_IN_METADATA"
54 };
55
56 typedef struct {
57         FLAC__int32 *original[FLAC__MAX_CHANNELS];
58         unsigned size; /* of each original[] in samples */
59         unsigned tail; /* in wide samples */
60         const FLAC__byte *encoded_signal;
61         unsigned encoded_signal_capacity;
62         unsigned encoded_bytes;
63         FLAC__bool into_frames;
64         verify_code result;
65         FLAC__StreamDecoder *decoder;
66 } verify_fifo_struct;
67
68 #ifdef FLAC__HAS_OGG
69 typedef struct {
70         ogg_stream_state os;
71         ogg_page og;
72 } ogg_info_struct;
73 #endif
74
75 typedef struct {
76         const char *inbasefilename;
77         FILE *fout;
78         const char *outfilename;
79         FLAC__StreamEncoder *encoder;
80         FLAC__bool verify;
81         FLAC__bool verbose;
82         FLAC__uint64 unencoded_size;
83         FLAC__uint64 total_samples_to_encode;
84         FLAC__uint64 bytes_written;
85         FLAC__uint64 samples_written;
86         FLAC__uint64 stream_offset; /* i.e. number of bytes before the first byte of the the first frame's header */
87         unsigned current_frame;
88         verify_fifo_struct verify_fifo;
89         FLAC__StreamMetaData_SeekTable seek_table;
90         unsigned first_seek_point_to_check;
91 #ifdef FLAC__HAS_OGG
92         FLAC__bool use_ogg;
93         ogg_info_struct ogg;
94 #endif
95 } encoder_wrapper_struct;
96
97 static FLAC__bool is_big_endian_host;
98
99 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*((FLAC__MAX_BITS_PER_SAMPLE+7)/8)];
100 static signed char *scbuffer = (signed char *)ucbuffer;
101 static FLAC__uint16 *usbuffer = (FLAC__uint16 *)ucbuffer;
102 static FLAC__int16 *ssbuffer = (FLAC__int16 *)ucbuffer;
103
104 static FLAC__int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
105 static FLAC__int32 *input[FLAC__MAX_CHANNELS];
106
107 /* local routines */
108 static FLAC__bool init(encoder_wrapper_struct *encoder_wrapper);
109 static FLAC__bool init_encoder(encode_options_t options, unsigned channels, unsigned bps, unsigned sample_rate, encoder_wrapper_struct *encoder_wrapper);
110 static FLAC__bool convert_to_seek_table(char *requested_seek_points, int num_requested_seek_points, FLAC__uint64 stream_samples, unsigned blocksize, FLAC__StreamMetaData_SeekTable *seek_table);
111 static void append_point_to_seek_table(FLAC__StreamMetaData_SeekTable *seek_table, FLAC__uint64 sample, FLAC__uint64 stream_samples, FLAC__uint64 blocksize);
112 static int seekpoint_compare(const FLAC__StreamMetaData_SeekPoint *l, const FLAC__StreamMetaData_SeekPoint *r);
113 static void format_input(FLAC__int32 *dest[], unsigned wide_samples, FLAC__bool is_big_endian, FLAC__bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper);
114 static void append_to_verify_fifo(encoder_wrapper_struct *encoder_wrapper, const FLAC__int32 *input[], unsigned channels, unsigned wide_samples);
115 static FLAC__StreamEncoderWriteStatus write_callback(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
116 static void metadata_callback(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
117 static FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
118 static FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data);
119 static void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
120 static void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
121 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
122 static FLAC__bool read_little_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn);
123 static FLAC__bool read_little_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn);
124 static FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val);
125 static FLAC__bool write_big_endian_uint64(FILE *f, FLAC__uint64 val);
126
127 int flac__encode_wav(FILE *infile, long infilesize, const char *infilename, const char *outfilename, const FLAC__byte *lookahead, unsigned lookahead_length, wav_encode_options_t options)
128 {
129         encoder_wrapper_struct encoder_wrapper;
130         FLAC__bool is_unsigned_samples = false;
131         unsigned channels = 0, bps = 0, sample_rate = 0, data_bytes;
132         size_t bytes_per_wide_sample, bytes_read;
133         FLAC__uint16 x;
134         FLAC__uint32 xx;
135         FLAC__bool got_fmt_chunk = false, got_data_chunk = false;
136         unsigned align_remainder = 0;
137         int info_align_carry = -1, info_align_zero = -1;
138
139         FLAC__ASSERT(!options.sector_align || options.common.skip == 0);
140
141         encoder_wrapper.encoder = 0;
142         encoder_wrapper.verify = options.common.verify;
143         encoder_wrapper.verbose = options.common.verbose;
144         encoder_wrapper.bytes_written = 0;
145         encoder_wrapper.samples_written = 0;
146         encoder_wrapper.stream_offset = 0;
147         encoder_wrapper.inbasefilename = flac__file_get_basename(infilename);
148         encoder_wrapper.outfilename = outfilename;
149         encoder_wrapper.seek_table.points = 0;
150         encoder_wrapper.first_seek_point_to_check = 0;
151 #ifdef FLAC__HAS_OGG
152         encoder_wrapper.use_ogg = options.common.use_ogg;
153 #endif
154         (void)infilesize;
155         (void)lookahead;
156         (void)lookahead_length;
157
158         if(0 == strcmp(outfilename, "-")) {
159                 encoder_wrapper.fout = file__get_binary_stdout();
160         }
161         else {
162                 if(0 == (encoder_wrapper.fout = fopen(outfilename, "wb"))) {
163                         fprintf(stderr, "%s: ERROR: can't open output file %s\n", encoder_wrapper.inbasefilename, outfilename);
164                         if(infile != stdin)
165                                 fclose(infile);
166                         return 1;
167                 }
168         }
169
170         if(!init(&encoder_wrapper))
171                 goto wav_abort_;
172
173         /*
174          * lookahead[] already has "RIFFxxxxWAVE", do sub-chunks
175          */
176         while(!feof(infile)) {
177                 if(!read_little_endian_uint32(infile, &xx, true, encoder_wrapper.inbasefilename))
178                         goto wav_abort_;
179                 if(feof(infile))
180                         break;
181                 if(xx == 0x20746d66) { /* "fmt " */
182                         if(got_fmt_chunk) {
183                                 fprintf(stderr, "%s: WARNING: skipping extra 'fmt ' sub-chunk\n", encoder_wrapper.inbasefilename);
184                         }
185                         else {
186                                 /* fmt sub-chunk size */
187                                 if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
188                                         goto wav_abort_;
189                                 if(xx < 16) {
190                                         fprintf(stderr, "%s: ERROR: found non-standard 'fmt ' sub-chunk which has length = %u\n", encoder_wrapper.inbasefilename, (unsigned)xx);
191                                         goto wav_abort_;
192                                 }
193                                 else if(xx != 16 && xx != 18) {
194                                         fprintf(stderr, "%s: WARNING: found non-standard 'fmt ' sub-chunk which has length = %u\n", encoder_wrapper.inbasefilename, (unsigned)xx);
195                                 }
196                                 data_bytes = xx;
197                                 /* compression code */
198                                 if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
199                                         goto wav_abort_;
200                                 if(x != 1) {
201                                         fprintf(stderr, "%s: ERROR: unsupported compression type %u\n", encoder_wrapper.inbasefilename, (unsigned)x);
202                                         goto wav_abort_;
203                                 }
204                                 /* number of channels */
205                                 if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
206                                         goto wav_abort_;
207                                 if(x == 0 || x > FLAC__MAX_CHANNELS) {
208                                         fprintf(stderr, "%s: ERROR: unsupported number channels %u\n", encoder_wrapper.inbasefilename, (unsigned)x);
209                                         goto wav_abort_;
210                                 }
211                                 else if(options.sector_align && x != 2) {
212                                         fprintf(stderr, "%s: ERROR: file has %u channels, must be 2 for --sector-align\n", encoder_wrapper.inbasefilename, (unsigned)x);
213                                         goto wav_abort_;
214                                 }
215                                 channels = x;
216                                 /* sample rate */
217                                 if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
218                                         goto wav_abort_;
219                                 if(xx == 0 || xx > FLAC__MAX_SAMPLE_RATE) {
220                                         fprintf(stderr, "%s: ERROR: unsupported sample rate %u\n", encoder_wrapper.inbasefilename, (unsigned)xx);
221                                         goto wav_abort_;
222                                 }
223                                 else if(options.sector_align && xx != 44100) {
224                                         fprintf(stderr, "%s: ERROR: file's sample rate is %u, must be 44100 for --sector-align\n", encoder_wrapper.inbasefilename, (unsigned)xx);
225                                         goto wav_abort_;
226                                 }
227                                 sample_rate = xx;
228                                 /* avg bytes per second (ignored) */
229                                 if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
230                                         goto wav_abort_;
231                                 /* block align (ignored) */
232                                 if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
233                                         goto wav_abort_;
234                                 /* bits per sample */
235                                 if(!read_little_endian_uint16(infile, &x, false, encoder_wrapper.inbasefilename))
236                                         goto wav_abort_;
237                                 if(x != 8 && x != 16 && x != 24) {
238                                         fprintf(stderr, "%s: ERROR: unsupported bits per sample %u\n", encoder_wrapper.inbasefilename, (unsigned)x);
239                                         goto wav_abort_;
240                                 }
241                                 bps = x;
242                                 is_unsigned_samples = (x == 8);
243
244                                 /* skip any extra data in the fmt sub-chunk */
245                                 data_bytes -= 16;
246                                 if(data_bytes > 0) {
247                                         unsigned left, need;
248                                         for(left = data_bytes; left > 0; ) {
249                                                 need = min(left, CHUNK_OF_SAMPLES);
250                                                 if(fread(ucbuffer, 1, need, infile) < need) {
251                                                         fprintf(stderr, "%s: ERROR during read while skipping samples\n", encoder_wrapper.inbasefilename);
252                                                         goto wav_abort_;
253                                                 }
254                                                 left -= need;
255                                         }
256                                 }
257
258                                 got_fmt_chunk = true;
259                         }
260                 }
261                 else if(xx == 0x61746164) { /* "data" */
262                         if(got_data_chunk) {
263                                 fprintf(stderr, "%s: WARNING: skipping extra 'data' sub-chunk\n", encoder_wrapper.inbasefilename);
264                         }
265                         else if(!got_fmt_chunk) {
266                                 fprintf(stderr, "%s: ERROR: got 'data' sub-chunk before 'fmt' sub-chunk\n", encoder_wrapper.inbasefilename);
267                                 goto wav_abort_;
268                         }
269                         else {
270                                 /* data size */
271                                 if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
272                                         goto wav_abort_;
273                                 data_bytes = xx;
274
275                                 bytes_per_wide_sample = channels * (bps >> 3);
276
277                                 if(options.common.skip > 0) {
278                                         if(fseek(infile, bytes_per_wide_sample * (unsigned)options.common.skip, SEEK_CUR) < 0) {
279                                                 /* can't seek input, read ahead manually... */
280                                                 unsigned left, need;
281                                                 for(left = (unsigned)options.common.skip; left > 0; ) { /*@@@ WATCHOUT: 4GB limit */
282                                                         need = min(left, CHUNK_OF_SAMPLES);
283                                                         if(fread(ucbuffer, bytes_per_wide_sample, need, infile) < need) {
284                                                                 fprintf(stderr, "%s: ERROR during read while skipping samples\n", encoder_wrapper.inbasefilename);
285                                                                 goto wav_abort_;
286                                                         }
287                                                         left -= need;
288                                                 }
289                                         }
290                                 }
291
292                                 data_bytes -= (unsigned)options.common.skip * bytes_per_wide_sample; /*@@@ WATCHOUT: 4GB limit */
293                                 encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample + *options.align_reservoir_samples;
294                                 if(options.sector_align) {
295                                         align_remainder = (unsigned)(encoder_wrapper.total_samples_to_encode % 588);
296                                         if(options.is_last_file)
297                                                 encoder_wrapper.total_samples_to_encode += (588-align_remainder); /* will pad with zeroes */
298                                         else
299                                                 encoder_wrapper.total_samples_to_encode -= align_remainder; /* will stop short and carry over to next file */
300                                 }
301
302                                 /* +44 for the size of the WAV headers; this is just an estimate for the progress indicator and doesn't need to be exact */
303                                 encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44;
304
305                                 if(!init_encoder(options.common, channels, bps, sample_rate, &encoder_wrapper))
306                                         goto wav_abort_;
307
308                                 encoder_wrapper.verify_fifo.into_frames = true;
309
310                                 /*
311                                  * first do any samples in the reservoir
312                                  */
313                                 if(options.sector_align && *options.align_reservoir_samples > 0) {
314                                         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
315                                         append_to_verify_fifo(&encoder_wrapper, options.align_reservoir, channels, *options.align_reservoir_samples);
316
317                                         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
318                                         if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, options.align_reservoir, *options.align_reservoir_samples)) {
319                                                 fprintf(stderr, "%s: ERROR during encoding, state = %d:%s\n", encoder_wrapper.inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper.encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper.encoder)]);
320                                                 goto wav_abort_;
321                                         }
322                                 }
323
324                                 /*
325                                  * decrement the data_bytes counter if we need to align the file
326                                  */
327                                 if(options.sector_align) {
328                                         if(options.is_last_file) {
329                                                 *options.align_reservoir_samples = 0;
330                                         }
331                                         else {
332                                                 *options.align_reservoir_samples = align_remainder;
333                                                 data_bytes -= (*options.align_reservoir_samples) * bytes_per_wide_sample;
334                                         }
335                                 }
336
337                                 /*
338                                  * now do from the file
339                                  */
340                                 while(data_bytes > 0) {
341                                         bytes_read = fread(ucbuffer, sizeof(unsigned char), min(data_bytes, CHUNK_OF_SAMPLES * bytes_per_wide_sample), infile);
342                                         if(bytes_read == 0) {
343                                                 if(ferror(infile)) {
344                                                         fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
345                                                         goto wav_abort_;
346                                                 }
347                                                 else if(feof(infile)) {
348                                                         fprintf(stderr, "%s: WARNING: unexpected EOF; expected %u samples, got %u samples\n", encoder_wrapper.inbasefilename, (unsigned)encoder_wrapper.total_samples_to_encode, (unsigned)encoder_wrapper.samples_written);
349                                                         data_bytes = 0;
350                                                 }
351                                         }
352                                         else {
353                                                 if(bytes_read % bytes_per_wide_sample != 0) {
354                                                         fprintf(stderr, "%s: ERROR: got partial sample\n", encoder_wrapper.inbasefilename);
355                                                         goto wav_abort_;
356                                                 }
357                                                 else {
358                                                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
359                                                         format_input(input, wide_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
360
361                                                         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
362                                                         if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
363                                                                 fprintf(stderr, "%s: ERROR during encoding, state = %d:%s\n", encoder_wrapper.inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper.encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper.encoder)]);
364                                                                 goto wav_abort_;
365                                                         }
366                                                         data_bytes -= bytes_read;
367                                                 }
368                                         }
369                                 }
370
371                                 /*
372                                  * now read unaligned samples into reservoir or pad with zeroes if necessary
373                                  */
374                                 if(options.sector_align) {
375                                         if(options.is_last_file) {
376                                                 unsigned wide_samples = 588 - align_remainder;
377                                                 if(wide_samples < 588) {
378                                                         unsigned channel;
379
380                                                         info_align_zero = wide_samples;
381                                                         data_bytes = wide_samples * bytes_per_wide_sample;
382                                                         for(channel = 0; channel < channels; channel++)
383                                                                 memset(input[channel], 0, data_bytes);
384                                                         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
385                                                         append_to_verify_fifo(&encoder_wrapper, input, channels, wide_samples);
386
387                                                         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
388                                                         if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
389                                                                 fprintf(stderr, "%s: ERROR during encoding, state = %d:%s\n", encoder_wrapper.inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper.encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper.encoder)]);
390                                                                 goto wav_abort_;
391                                                         }
392                                                 }
393                                         }
394                                         else {
395                                                 if(*options.align_reservoir_samples > 0) {
396                                                         FLAC__ASSERT(CHUNK_OF_SAMPLES >= 588);
397                                                         bytes_read = fread(ucbuffer, sizeof(unsigned char), (*options.align_reservoir_samples) * bytes_per_wide_sample, infile);
398                                                         if(bytes_read == 0 && ferror(infile)) {
399                                                                 fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
400                                                                 goto wav_abort_;
401                                                         }
402                                                         else if(bytes_read != (*options.align_reservoir_samples) * bytes_per_wide_sample) {
403                                                                 fprintf(stderr, "%s: WARNING: unexpected EOF; read %u bytes; expected %u samples, got %u samples\n", encoder_wrapper.inbasefilename, (unsigned)bytes_read, (unsigned)encoder_wrapper.total_samples_to_encode, (unsigned)encoder_wrapper.samples_written);
404                                                                 data_bytes = 0;
405                                                         }
406                                                         else {
407                                                                 info_align_carry = *options.align_reservoir_samples;
408                                                                 format_input(options.align_reservoir, *options.align_reservoir_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
409                                                         }
410                                                 }
411                                         }
412                                 }
413
414                                 got_data_chunk = true;
415                         }
416                 }
417                 else {
418                         fprintf(stderr, "%s: WARNING: skipping unknown sub-chunk '%c%c%c%c'\n", encoder_wrapper.inbasefilename, (char)(xx&255), (char)((xx>>8)&255), (char)((xx>>16)&255), (char)(xx>>24));
419                         /* sub-chunk size */
420                         if(!read_little_endian_uint32(infile, &xx, false, encoder_wrapper.inbasefilename))
421                                 goto wav_abort_;
422                         if(fseek(infile, xx, SEEK_CUR) < 0) {
423                                 /* can't seek input, read ahead manually... */
424                                 unsigned left, need;
425                                 const unsigned chunk = sizeof(ucbuffer);
426                                 for(left = xx; left > 0; ) {
427                                         need = min(left, chunk);
428                                         if(fread(ucbuffer, 1, need, infile) < need) {
429                                                 fprintf(stderr, "%s: ERROR during read while skipping unsupported sub-chunk\n", encoder_wrapper.inbasefilename);
430                                                 goto wav_abort_;
431                                         }
432                                         left -= need;
433                                 }
434                         }
435                 }
436         }
437
438         if(encoder_wrapper.encoder) {
439                 if(FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_OK)
440                         FLAC__stream_encoder_finish(encoder_wrapper.encoder);
441                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
442 #ifdef FLAC__HAS_OGG
443                 if(encoder_wrapper.use_ogg)
444                         ogg_stream_clear(&encoder_wrapper.ogg.os);
445 #endif
446         }
447         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
448                 print_stats(&encoder_wrapper);
449                 fprintf(stderr, "\n");
450         }
451         if(0 != encoder_wrapper.seek_table.points)
452                 free(encoder_wrapper.seek_table.points);
453         if(options.common.verify) {
454                 FLAC__stream_decoder_finish(encoder_wrapper.verify_fifo.decoder);
455                 FLAC__stream_decoder_delete(encoder_wrapper.verify_fifo.decoder);
456                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
457                         fprintf(stderr, "Verify FAILED! (%s)  Do not trust %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
458                         return 1;
459                 }
460         }
461         if(info_align_carry >= 0)
462                 fprintf(stderr, "%s: INFO: sector alignment causing %d samples to be carried over\n", encoder_wrapper.inbasefilename, info_align_carry);
463         if(info_align_zero >= 0)
464                 fprintf(stderr, "%s: INFO: sector alignment causing %d zero samples to be appended\n", encoder_wrapper.inbasefilename, info_align_zero);
465         if(infile != stdin)
466                 fclose(infile);
467         return 0;
468 wav_abort_:
469         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
470                 fprintf(stderr, "\n");
471         if(encoder_wrapper.encoder) {
472                 if(FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_OK)
473                         FLAC__stream_encoder_finish(encoder_wrapper.encoder);
474                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
475 #ifdef FLAC__HAS_OGG
476                 if(encoder_wrapper.use_ogg)
477                         ogg_stream_clear(&encoder_wrapper.ogg.os);
478 #endif
479         }
480         if(0 != encoder_wrapper.seek_table.points)
481                 free(encoder_wrapper.seek_table.points);
482         if(options.common.verify) {
483                 FLAC__stream_decoder_finish(encoder_wrapper.verify_fifo.decoder);
484                 FLAC__stream_decoder_delete(encoder_wrapper.verify_fifo.decoder);
485                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
486                         fprintf(stderr, "Verify FAILED! (%s)  Do not trust %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
487                         return 1;
488                 }
489         }
490         if(infile != stdin)
491                 fclose(infile);
492         unlink(outfilename);
493         return 1;
494 }
495
496 int flac__encode_raw(FILE *infile, long infilesize, const char *infilename, const char *outfilename, const FLAC__byte *lookahead, unsigned lookahead_length, raw_encode_options_t options)
497 {
498         encoder_wrapper_struct encoder_wrapper;
499         size_t bytes_read;
500         const size_t bytes_per_wide_sample = options.channels * (options.bps >> 3);
501
502         encoder_wrapper.encoder = 0;
503         encoder_wrapper.verify = options.common.verify;
504         encoder_wrapper.verbose = options.common.verbose;
505         encoder_wrapper.bytes_written = 0;
506         encoder_wrapper.samples_written = 0;
507         encoder_wrapper.stream_offset = 0;
508         encoder_wrapper.inbasefilename = flac__file_get_basename(infilename);
509         encoder_wrapper.outfilename = outfilename;
510         encoder_wrapper.seek_table.points = 0;
511         encoder_wrapper.first_seek_point_to_check = 0;
512 #ifdef FLAC__HAS_OGG
513         encoder_wrapper.use_ogg = options.common.use_ogg;
514 #endif
515
516         if(0 == strcmp(outfilename, "-")) {
517                 encoder_wrapper.fout = file__get_binary_stdout();
518         }
519         else {
520                 if(0 == (encoder_wrapper.fout = fopen(outfilename, "wb"))) {
521                         fprintf(stderr, "ERROR: can't open output file %s\n", outfilename);
522                         if(infile != stdin)
523                                 fclose(infile);
524                         return 1;
525                 }
526         }
527
528         if(!init(&encoder_wrapper))
529                 goto raw_abort_;
530
531         /* get the file length */
532         if(infilesize < 0) {
533                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
534         }
535         else {
536                 encoder_wrapper.total_samples_to_encode = (unsigned)infilesize / bytes_per_wide_sample - options.common.skip;
537                 encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample;
538         }
539
540         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode <= 0)
541                 fprintf(stderr, "(No runtime statistics possible; please wait for encoding to finish...)\n");
542
543         if(options.common.skip > 0) {
544                 unsigned skip_bytes = bytes_per_wide_sample * (unsigned)options.common.skip;
545                 if(skip_bytes > lookahead_length) {
546                         skip_bytes -= lookahead_length;
547                         lookahead_length = 0;
548                         if(fseek(infile, (long)skip_bytes, SEEK_CUR) < 0) {
549                                 /* can't seek input, read ahead manually... */
550                                 unsigned left, need;
551                                 const unsigned chunk = sizeof(ucbuffer);
552                                 for(left = skip_bytes; left > 0; ) {
553                                         need = min(left, chunk);
554                                         if(fread(ucbuffer, 1, need, infile) < need) {
555                                                 fprintf(stderr, "%s: ERROR during read while skipping samples\n", encoder_wrapper.inbasefilename);
556                                                 goto raw_abort_;
557                                         }
558                                         left -= need;
559                                 }
560                         }
561                 }
562                 else {
563                         lookahead += skip_bytes;
564                         lookahead_length -= skip_bytes;
565                 }
566         }
567
568         if(!init_encoder(options.common, options.channels, options.bps, options.sample_rate, &encoder_wrapper))
569                 goto raw_abort_;
570
571         encoder_wrapper.verify_fifo.into_frames = true;
572
573         while(!feof(infile)) {
574                 if(lookahead_length > 0) {
575                         FLAC__ASSERT(lookahead_length < CHUNK_OF_SAMPLES * bytes_per_wide_sample);
576                         memcpy(ucbuffer, lookahead, lookahead_length);
577                         bytes_read = fread(ucbuffer+lookahead_length, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample - lookahead_length, infile) + lookahead_length;
578                         if(ferror(infile)) {
579                                 fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
580                                 goto raw_abort_;
581                         }
582                         lookahead_length = 0;
583                 }
584                 else
585                         bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, infile);
586
587                 if(bytes_read == 0) {
588                         if(ferror(infile)) {
589                                 fprintf(stderr, "%s: ERROR during read\n", encoder_wrapper.inbasefilename);
590                                 goto raw_abort_;
591                         }
592                 }
593                 else if(bytes_read % bytes_per_wide_sample != 0) {
594                         fprintf(stderr, "%s: ERROR: got partial sample\n", encoder_wrapper.inbasefilename);
595                         goto raw_abort_;
596                 }
597                 else {
598                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
599                         format_input(input, wide_samples, options.is_big_endian, options.is_unsigned_samples, options.channels, options.bps, &encoder_wrapper);
600
601                         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
602                         if(!FLAC__stream_encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
603                                 fprintf(stderr, "%s: ERROR during encoding, state = %d:%s\n", encoder_wrapper.inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper.encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper.encoder)]);
604                                 goto raw_abort_;
605                         }
606                 }
607         }
608
609         if(encoder_wrapper.encoder) {
610                 if(FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_OK)
611                         FLAC__stream_encoder_finish(encoder_wrapper.encoder);
612                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
613 #ifdef FLAC__HAS_OGG
614                 if(encoder_wrapper.use_ogg)
615                         ogg_stream_clear(&encoder_wrapper.ogg.os);
616 #endif
617         }
618         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
619                 print_stats(&encoder_wrapper);
620                 fprintf(stderr, "\n");
621         }
622         if(0 != encoder_wrapper.seek_table.points)
623                 free(encoder_wrapper.seek_table.points);
624         if(options.common.verify) {
625                 FLAC__stream_decoder_finish(encoder_wrapper.verify_fifo.decoder);
626                 FLAC__stream_decoder_delete(encoder_wrapper.verify_fifo.decoder);
627                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
628                         fprintf(stderr, "Verify FAILED! (%s)  Do not trust %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
629                         return 1;
630                 }
631         }
632         if(infile != stdin)
633                 fclose(infile);
634         return 0;
635 raw_abort_:
636         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
637                 fprintf(stderr, "\n");
638         if(encoder_wrapper.encoder) {
639                 if(FLAC__stream_encoder_get_state(encoder_wrapper.encoder) == FLAC__STREAM_ENCODER_OK)
640                         FLAC__stream_encoder_finish(encoder_wrapper.encoder);
641                 FLAC__stream_encoder_delete(encoder_wrapper.encoder);
642 #ifdef FLAC__HAS_OGG
643                 if(encoder_wrapper.use_ogg)
644                         ogg_stream_clear(&encoder_wrapper.ogg.os);
645 #endif
646         }
647         if(0 != encoder_wrapper.seek_table.points)
648                 free(encoder_wrapper.seek_table.points);
649         if(options.common.verify) {
650                 FLAC__stream_decoder_finish(encoder_wrapper.verify_fifo.decoder);
651                 FLAC__stream_decoder_delete(encoder_wrapper.verify_fifo.decoder);
652                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
653                         fprintf(stderr, "Verify FAILED! (%s)  Do not trust %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfilename);
654                         return 1;
655                 }
656         }
657         if(infile != stdin)
658                 fclose(infile);
659         unlink(outfilename);
660         return 1;
661 }
662
663 FLAC__bool init(encoder_wrapper_struct *encoder_wrapper)
664 {
665         unsigned i;
666         FLAC__uint32 test = 1;
667
668         is_big_endian_host = (*((FLAC__byte*)(&test)))? false : true;
669
670         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
671                 input[i] = &(in[i][0]);
672
673         encoder_wrapper->encoder = FLAC__stream_encoder_new();
674         if(0 == encoder_wrapper->encoder) {
675                 fprintf(stderr, "%s: ERROR creating the encoder instance\n", encoder_wrapper->inbasefilename);
676                 return false;
677         }
678
679 #ifdef FLAC__HAS_OGG
680         if(encoder_wrapper->use_ogg) {
681                 if(ogg_stream_init(&encoder_wrapper->ogg.os, 0) != 0) {
682                         fprintf(stderr, "%s: ERROR initializing the Ogg stream\n", encoder_wrapper->inbasefilename);
683                         FLAC__stream_encoder_delete(encoder_wrapper->encoder);
684                         return false;
685                 }
686         }
687 #endif
688
689         return true;
690 }
691
692 FLAC__bool init_encoder(encode_options_t options, unsigned channels, unsigned bps, unsigned sample_rate, encoder_wrapper_struct *encoder_wrapper)
693 {
694         unsigned i;
695
696         if(channels != 2)
697                 options.do_mid_side = options.loose_mid_side = false;
698
699         if(encoder_wrapper->verify) {
700                 /* set up the fifo which will hold the original signal to compare against */
701                 encoder_wrapper->verify_fifo.size = options.blocksize + CHUNK_OF_SAMPLES;
702                 for(i = 0; i < channels; i++) {
703                         if(0 == (encoder_wrapper->verify_fifo.original[i] = (FLAC__int32*)malloc(sizeof(FLAC__int32) * encoder_wrapper->verify_fifo.size))) {
704                                 fprintf(stderr, "%s: ERROR allocating verify buffers\n", encoder_wrapper->inbasefilename);
705                                 return false;
706                         }
707                 }
708                 encoder_wrapper->verify_fifo.tail = 0;
709                 encoder_wrapper->verify_fifo.into_frames = false;
710                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_OK;
711
712                 /* set up a stream decoder for verification */
713                 encoder_wrapper->verify_fifo.decoder = FLAC__stream_decoder_new();
714                 if(0 == encoder_wrapper->verify_fifo.decoder) {
715                         fprintf(stderr, "%s: ERROR creating the verify decoder instance\n", encoder_wrapper->inbasefilename);
716                         return false;
717                 }
718                 FLAC__stream_decoder_set_read_callback(encoder_wrapper->verify_fifo.decoder, verify_read_callback);
719                 FLAC__stream_decoder_set_write_callback(encoder_wrapper->verify_fifo.decoder, verify_write_callback);
720                 FLAC__stream_decoder_set_metadata_callback(encoder_wrapper->verify_fifo.decoder, verify_metadata_callback);
721                 FLAC__stream_decoder_set_error_callback(encoder_wrapper->verify_fifo.decoder, verify_error_callback);
722                 FLAC__stream_decoder_set_client_data(encoder_wrapper->verify_fifo.decoder, encoder_wrapper);
723                 if(FLAC__stream_decoder_init(encoder_wrapper->verify_fifo.decoder) != FLAC__STREAM_DECODER_SEARCH_FOR_METADATA) {
724                         fprintf(stderr, "%s: ERROR initializing decoder, state = %d:%s\n", encoder_wrapper->inbasefilename, FLAC__stream_decoder_get_state(encoder_wrapper->verify_fifo.decoder), FLAC__StreamDecoderStateString[FLAC__stream_decoder_get_state(encoder_wrapper->verify_fifo.decoder)]);
725                         return false;
726                 }
727         }
728
729         if(!convert_to_seek_table(options.requested_seek_points, options.num_requested_seek_points, encoder_wrapper->total_samples_to_encode, options.blocksize, &encoder_wrapper->seek_table)) {
730                 fprintf(stderr, "%s: ERROR allocating seek table\n", encoder_wrapper->inbasefilename);
731                 return false;
732         }
733
734         FLAC__stream_encoder_set_streamable_subset(encoder_wrapper->encoder, !options.lax);
735         FLAC__stream_encoder_set_do_mid_side_stereo(encoder_wrapper->encoder, options.do_mid_side);
736         FLAC__stream_encoder_set_loose_mid_side_stereo(encoder_wrapper->encoder, options.loose_mid_side);
737         FLAC__stream_encoder_set_channels(encoder_wrapper->encoder, channels);
738         FLAC__stream_encoder_set_bits_per_sample(encoder_wrapper->encoder, bps);
739         FLAC__stream_encoder_set_sample_rate(encoder_wrapper->encoder, sample_rate);
740         FLAC__stream_encoder_set_blocksize(encoder_wrapper->encoder, options.blocksize);
741         FLAC__stream_encoder_set_max_lpc_order(encoder_wrapper->encoder, options.max_lpc_order);
742         FLAC__stream_encoder_set_qlp_coeff_precision(encoder_wrapper->encoder, options.qlp_coeff_precision);
743         FLAC__stream_encoder_set_do_qlp_coeff_prec_search(encoder_wrapper->encoder, options.do_qlp_coeff_prec_search);
744         FLAC__stream_encoder_set_do_escape_coding(encoder_wrapper->encoder, options.do_escape_coding);
745         FLAC__stream_encoder_set_do_exhaustive_model_search(encoder_wrapper->encoder, options.do_exhaustive_model_search);
746         FLAC__stream_encoder_set_min_residual_partition_order(encoder_wrapper->encoder, options.min_residual_partition_order);
747         FLAC__stream_encoder_set_max_residual_partition_order(encoder_wrapper->encoder, options.max_residual_partition_order);
748         FLAC__stream_encoder_set_rice_parameter_search_dist(encoder_wrapper->encoder, options.rice_parameter_search_dist);
749         FLAC__stream_encoder_set_total_samples_estimate(encoder_wrapper->encoder, encoder_wrapper->total_samples_to_encode);
750         FLAC__stream_encoder_set_seek_table(encoder_wrapper->encoder, (encoder_wrapper->seek_table.num_points > 0)? &encoder_wrapper->seek_table : 0);
751         FLAC__stream_encoder_set_padding(encoder_wrapper->encoder, options.padding);
752         FLAC__stream_encoder_set_last_metadata_is_last(encoder_wrapper->encoder, true);
753         FLAC__stream_encoder_set_write_callback(encoder_wrapper->encoder, write_callback);
754         FLAC__stream_encoder_set_metadata_callback(encoder_wrapper->encoder, metadata_callback);
755         FLAC__stream_encoder_set_client_data(encoder_wrapper->encoder, encoder_wrapper);
756
757         if(FLAC__stream_encoder_init(encoder_wrapper->encoder) != FLAC__STREAM_ENCODER_OK) {
758                 fprintf(stderr, "%s: ERROR initializing encoder, state = %d:%s\n", encoder_wrapper->inbasefilename, FLAC__stream_encoder_get_state(encoder_wrapper->encoder), FLAC__StreamEncoderStateString[FLAC__stream_encoder_get_state(encoder_wrapper->encoder)]);
759                 return false;
760         }
761
762         /* the above call writes all the metadata, so we save the stream offset now */
763         encoder_wrapper->stream_offset = encoder_wrapper->bytes_written;
764
765         return true;
766 }
767
768 FLAC__bool convert_to_seek_table(char *requested_seek_points, int num_requested_seek_points, FLAC__uint64 stream_samples, unsigned blocksize, FLAC__StreamMetaData_SeekTable *seek_table)
769 {
770         unsigned i, j, real_points, placeholders;
771         char *pt = requested_seek_points, *q;
772         FLAC__bool first;
773
774         seek_table->num_points = 0;
775
776         if(num_requested_seek_points == 0)
777                 return true;
778
779         if(num_requested_seek_points < 0) {
780                 strcpy(requested_seek_points, "100x<");
781                 num_requested_seek_points = 1;
782         }
783
784         /* first count how many individual seek point we may need */
785         real_points = placeholders = 0;
786         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
787                 q = strchr(pt, '<');
788                 FLAC__ASSERT(0 != q);
789                 *q = '\0';
790
791                 if(0 == strcmp(pt, "X")) { /* -S X */
792                         placeholders++;
793                 }
794                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
795                         if(stream_samples > 0) /* we can only do these if we know the number of samples to encode up front */
796                                 real_points += (unsigned)atoi(pt);
797                 }
798                 else { /* -S # */
799                         real_points++;
800                 }
801                 *q++ = '<';
802
803                 pt = q;
804         }
805         pt = requested_seek_points;
806
807         /* make some space */
808         if(0 == (seek_table->points = (FLAC__StreamMetaData_SeekPoint*)malloc(sizeof(FLAC__StreamMetaData_SeekPoint) * (real_points+placeholders))))
809                 return false;
810
811         /* initialize the seek_table.  we set frame_samples to zero to signify the points have not yet been hit by a frame write yet. */
812         for(i = 0; i < real_points+placeholders; i++) {
813                 seek_table->points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
814                 seek_table->points[i].stream_offset = 0;
815                 seek_table->points[i].frame_samples = 0;
816         }
817
818         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
819                 q = strchr(pt, '<');
820                 FLAC__ASSERT(0 != q);
821                 *q++ = '\0';
822
823                 if(0 == strcmp(pt, "X")) { /* -S X */
824                         ; /* we append placeholders later */
825                 }
826                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
827                         if(stream_samples > 0) { /* we can only do these if we know the number of samples to encode up front */
828                                 unsigned j, n;
829                                 n = (unsigned)atoi(pt);
830                                 for(j = 0; j < n; j++)
831                                         append_point_to_seek_table(seek_table, stream_samples * (FLAC__uint64)j / (FLAC__uint64)n, stream_samples, blocksize);
832                         }
833                 }
834                 else { /* -S # */
835                         append_point_to_seek_table(seek_table, (FLAC__uint64)atoi(pt), stream_samples, blocksize);
836                 }
837
838                 pt = q;
839         }
840
841         /* sort the seekpoints */
842         qsort(seek_table->points, seek_table->num_points, sizeof(FLAC__StreamMetaData_SeekPoint), (int (*)(const void *, const void *))seekpoint_compare);
843
844         /* uniqify the seekpoints */
845         first = true;
846         for(i = j = 0; i < seek_table->num_points; i++) {
847                 if(!first) {
848                         if(seek_table->points[i].sample_number == seek_table->points[j-1].sample_number)
849                                 continue;
850                 }
851                 first = false;
852                 seek_table->points[j++] = seek_table->points[i];
853         }
854         seek_table->num_points = j;
855
856         /* append placeholders */
857         for(i = 0, j = seek_table->num_points; i < placeholders; i++, j++)
858                 seek_table->points[j].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
859         seek_table->num_points += placeholders;
860
861         return true;
862 }
863
864 void append_point_to_seek_table(FLAC__StreamMetaData_SeekTable *seek_table, FLAC__uint64 sample, FLAC__uint64 stream_samples, FLAC__uint64 blocksize)
865 {
866         const FLAC__uint64 target_sample = (sample / blocksize) * blocksize;
867
868         if(stream_samples == 0 || target_sample < stream_samples)
869                 seek_table->points[seek_table->num_points++].sample_number = target_sample;
870 }
871
872 int seekpoint_compare(const FLAC__StreamMetaData_SeekPoint *l, const FLAC__StreamMetaData_SeekPoint *r)
873 {
874         /* we don't just 'return l->sample_number - r->sample_number' since the result (FLAC__int64) might overflow an 'int' */
875         if(l->sample_number == r->sample_number)
876                 return 0;
877         else if(l->sample_number < r->sample_number)
878                 return -1;
879         else
880                 return 1;
881 }
882
883 void format_input(FLAC__int32 *dest[], unsigned wide_samples, FLAC__bool is_big_endian, FLAC__bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper)
884 {
885         unsigned wide_sample, sample, channel, byte;
886
887         if(bps == 8) {
888                 if(is_unsigned_samples) {
889                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
890                                 for(channel = 0; channel < channels; channel++, sample++)
891                                         dest[channel][wide_sample] = (FLAC__int32)ucbuffer[sample] - 0x80;
892                 }
893                 else {
894                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
895                                 for(channel = 0; channel < channels; channel++, sample++)
896                                         dest[channel][wide_sample] = (FLAC__int32)scbuffer[sample];
897                 }
898         }
899         else if(bps == 16) {
900                 if(is_big_endian != is_big_endian_host) {
901                         unsigned char tmp;
902                         const unsigned bytes = wide_samples * channels * (bps >> 3);
903                         for(byte = 0; byte < bytes; byte += 2) {
904                                 tmp = ucbuffer[byte];
905                                 ucbuffer[byte] = ucbuffer[byte+1];
906                                 ucbuffer[byte+1] = tmp;
907                         }
908                 }
909                 if(is_unsigned_samples) {
910                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
911                                 for(channel = 0; channel < channels; channel++, sample++)
912                                         dest[channel][wide_sample] = (FLAC__int32)usbuffer[sample] - 0x8000;
913                 }
914                 else {
915                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
916                                 for(channel = 0; channel < channels; channel++, sample++)
917                                         dest[channel][wide_sample] = (FLAC__int32)ssbuffer[sample];
918                 }
919         }
920         else if(bps == 24) {
921                 if(!is_big_endian) {
922                         unsigned char tmp;
923                         const unsigned bytes = wide_samples * channels * (bps >> 3);
924                         for(byte = 0; byte < bytes; byte += 3) {
925                                 tmp = ucbuffer[byte];
926                                 ucbuffer[byte] = ucbuffer[byte+2];
927                                 ucbuffer[byte+2] = tmp;
928                         }
929                 }
930                 if(is_unsigned_samples) {
931                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
932                                 for(channel = 0; channel < channels; channel++, sample++) {
933                                         dest[channel][wide_sample]  = ucbuffer[byte++]; dest[channel][wide_sample] <<= 8;
934                                         dest[channel][wide_sample] |= ucbuffer[byte++]; dest[channel][wide_sample] <<= 8;
935                                         dest[channel][wide_sample] |= ucbuffer[byte++];
936                                         dest[channel][wide_sample] -= 0x800000;
937                                 }
938                 }
939                 else {
940                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
941                                 for(channel = 0; channel < channels; channel++, sample++) {
942                                         dest[channel][wide_sample]  = scbuffer[byte++]; dest[channel][wide_sample] <<= 8;
943                                         dest[channel][wide_sample] |= ucbuffer[byte++]; dest[channel][wide_sample] <<= 8;
944                                         dest[channel][wide_sample] |= ucbuffer[byte++];
945                                 }
946                 }
947         }
948         else {
949                 FLAC__ASSERT(0);
950         }
951
952         /* NOTE: some versions of GCC can't figure out const-ness right and will give you an 'incompatible pointer type' warning on arg 2 here: */
953         append_to_verify_fifo(encoder_wrapper, dest, channels, wide_samples);
954 }
955
956 void append_to_verify_fifo(encoder_wrapper_struct *encoder_wrapper, const FLAC__int32 *src[], unsigned channels, unsigned wide_samples)
957 {
958         if(encoder_wrapper->verify) {
959                 unsigned channel;
960                 for(channel = 0; channel < channels; channel++)
961                         memcpy(&encoder_wrapper->verify_fifo.original[channel][encoder_wrapper->verify_fifo.tail], src[channel], sizeof(FLAC__int32) * wide_samples);
962                 encoder_wrapper->verify_fifo.tail += wide_samples;
963                 FLAC__ASSERT(encoder_wrapper->verify_fifo.tail <= encoder_wrapper->verify_fifo.size);
964         }
965 }
966
967 FLAC__StreamEncoderWriteStatus write_callback(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
968 {
969         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
970         const unsigned mask = (FLAC__stream_encoder_get_do_exhaustive_model_search(encoder) || FLAC__stream_encoder_get_do_qlp_coeff_prec_search(encoder))? 0x1f : 0x7f;
971
972         /* mark the current seek point if hit (if stream_offset == 0 that means we're still writing metadata and haven't hit the first frame yet) */
973         if(encoder_wrapper->stream_offset > 0 && encoder_wrapper->seek_table.num_points > 0) {
974                 FLAC__uint64 current_sample = (FLAC__uint64)current_frame * (FLAC__uint64)FLAC__stream_encoder_get_blocksize(encoder), test_sample;
975                 unsigned i;
976                 for(i = encoder_wrapper->first_seek_point_to_check; i < encoder_wrapper->seek_table.num_points; i++) {
977                         test_sample = encoder_wrapper->seek_table.points[i].sample_number;
978                         if(test_sample > current_sample) {
979                                 break;
980                         }
981                         else if(test_sample == current_sample) {
982                                 encoder_wrapper->seek_table.points[i].stream_offset = encoder_wrapper->bytes_written - encoder_wrapper->stream_offset;
983                                 encoder_wrapper->seek_table.points[i].frame_samples = FLAC__stream_encoder_get_blocksize(encoder);
984                                 encoder_wrapper->first_seek_point_to_check++;
985                                 break;
986                         }
987                         else {
988                                 encoder_wrapper->first_seek_point_to_check++;
989                         }
990                 }
991         }
992
993         encoder_wrapper->bytes_written += bytes;
994         encoder_wrapper->samples_written += samples;
995         encoder_wrapper->current_frame = current_frame;
996
997         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
998                 print_stats(encoder_wrapper);
999
1000         if(encoder_wrapper->verify) {
1001                 encoder_wrapper->verify_fifo.encoded_signal = buffer;
1002                 encoder_wrapper->verify_fifo.encoded_bytes = bytes;
1003                 if(encoder_wrapper->verify_fifo.into_frames) {
1004                         if(!FLAC__stream_decoder_process_one_frame(encoder_wrapper->verify_fifo.decoder)) {
1005                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_FRAME;
1006                                 return FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR;
1007                         }
1008                 }
1009                 else {
1010                         if(!FLAC__stream_decoder_process_metadata(encoder_wrapper->verify_fifo.decoder)) {
1011                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_METADATA;
1012                                 return FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR;
1013                         }
1014                 }
1015         }
1016
1017 #ifdef FLAC__HAS_OGG
1018         if(encoder_wrapper->use_ogg) {
1019                 ogg_packet op;
1020
1021                 memset(&op, 0, sizeof(op));
1022                 op.packet = (unsigned char *)buffer;
1023                 op.granulepos = encoder_wrapper->samples_written - 1;
1024                 /*@@@ WATCHOUT:
1025                  * this depends on the behavior of libFLAC that we will get one
1026                  * write_callback first with all the metadata (and 'samples'
1027                  * will be 0), then one write_callback for each frame.
1028                  */
1029                 op.packetno = (samples == 0? -1 : (int)encoder_wrapper->current_frame);
1030                 op.bytes = bytes;
1031
1032                 if (encoder_wrapper->bytes_written == bytes)
1033                         op.b_o_s = 1;
1034
1035                 if (encoder_wrapper->total_samples_to_encode == encoder_wrapper->samples_written)
1036                         op.e_o_s = 1;
1037
1038                 ogg_stream_packetin(&encoder_wrapper->ogg.os, &op);
1039
1040                 while(ogg_stream_pageout(&encoder_wrapper->ogg.os, &encoder_wrapper->ogg.og) != 0) {
1041                         int written;
1042                         written = fwrite(encoder_wrapper->ogg.og.header, 1, encoder_wrapper->ogg.og.header_len, encoder_wrapper->fout);
1043                         if (written != encoder_wrapper->ogg.og.header_len)
1044                                 return FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR;
1045
1046                         written = fwrite(encoder_wrapper->ogg.og.body, 1, encoder_wrapper->ogg.og.body_len, encoder_wrapper->fout);
1047                         if (written != encoder_wrapper->ogg.og.body_len)
1048                                 return FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR;
1049                 }
1050
1051                 return FLAC__STREAM_ENCODER_WRITE_OK;
1052         }
1053         else
1054 #endif
1055         {
1056                 if(fwrite(buffer, sizeof(FLAC__byte), bytes, encoder_wrapper->fout) == bytes)
1057                         return FLAC__STREAM_ENCODER_WRITE_OK;
1058                 else
1059                         return FLAC__STREAM_ENCODER_WRITE_FATAL_ERROR;
1060         }
1061 }
1062
1063 void metadata_callback(const FLAC__StreamEncoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data)
1064 {
1065         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1066         FLAC__byte b;
1067         FILE *f = encoder_wrapper->fout;
1068         const FLAC__uint64 samples = metadata->data.stream_info.total_samples;
1069         const unsigned min_framesize = metadata->data.stream_info.min_framesize;
1070         const unsigned max_framesize = metadata->data.stream_info.max_framesize;
1071
1072         FLAC__ASSERT(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
1073
1074         /*
1075          * If we are writing to an ogg stream, there is no need to go back
1076          * and update the STREAMINFO or SEEKTABLE blocks; the values we would
1077          * update are not necessary with Ogg as the transport.  We can't do
1078          * it reliably anyway without knowing the Ogg structure.
1079          */
1080 #ifdef FLAC__HAS_OGG
1081         if(encoder_wrapper->use_ogg)
1082                 return;
1083 #endif
1084
1085         /*
1086          * we get called by the encoder when the encoding process has
1087          * finished so that we can update the STREAMINFO and SEEKTABLE
1088          * blocks.
1089          */
1090
1091         (void)encoder; /* silence compiler warning about unused parameter */
1092
1093         if(f != stdout) {
1094                 fclose(encoder_wrapper->fout);
1095                 if(0 == (f = fopen(encoder_wrapper->outfilename, "r+b")))
1096                         return;
1097         }
1098
1099         /* all this is based on intimate knowledge of the stream header
1100          * layout, but a change to the header format that would break this
1101          * would also break all streams encoded in the previous format.
1102          */
1103
1104         if(-1 == fseek(f, 26, SEEK_SET)) goto end_;
1105         fwrite(metadata->data.stream_info.md5sum, 1, 16, f);
1106
1107 samples_:
1108         /* if we get this far we know we can seek so no need to check the
1109          * return value from fseek()
1110          */
1111         fseek(f, 21, SEEK_SET);
1112         if(fread(&b, 1, 1, f) != 1) goto framesize_;
1113         fseek(f, 21, SEEK_SET);
1114         b = (b & 0xf0) | (FLAC__byte)((samples >> 32) & 0x0F);
1115         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1116         b = (FLAC__byte)((samples >> 24) & 0xFF);
1117         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1118         b = (FLAC__byte)((samples >> 16) & 0xFF);
1119         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1120         b = (FLAC__byte)((samples >> 8) & 0xFF);
1121         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1122         b = (FLAC__byte)(samples & 0xFF);
1123         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
1124
1125 framesize_:
1126         fseek(f, 12, SEEK_SET);
1127         b = (FLAC__byte)((min_framesize >> 16) & 0xFF);
1128         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1129         b = (FLAC__byte)((min_framesize >> 8) & 0xFF);
1130         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1131         b = (FLAC__byte)(min_framesize & 0xFF);
1132         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1133         b = (FLAC__byte)((max_framesize >> 16) & 0xFF);
1134         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1135         b = (FLAC__byte)((max_framesize >> 8) & 0xFF);
1136         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1137         b = (FLAC__byte)(max_framesize & 0xFF);
1138         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
1139
1140 seektable_:
1141         if(encoder_wrapper->seek_table.num_points > 0) {
1142                 long pos;
1143                 unsigned i;
1144
1145                 /* convert any unused seek points to placeholders */
1146                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
1147                         if(encoder_wrapper->seek_table.points[i].sample_number == FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER)
1148                                 break;
1149                         else if(encoder_wrapper->seek_table.points[i].frame_samples == 0)
1150                                 encoder_wrapper->seek_table.points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
1151                 }
1152
1153                 /* the offset of the seek table data 'pos' should be after then stream sync and STREAMINFO block and SEEKTABLE header */
1154                 pos = (FLAC__STREAM_SYNC_LEN + FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
1155                 pos += metadata->length;
1156                 pos += (FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
1157                 fseek(f, pos, SEEK_SET);
1158                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
1159                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table.points[i].sample_number)) goto end_;
1160                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table.points[i].stream_offset)) goto end_;
1161                         if(!write_big_endian_uint16(f, (FLAC__uint16)encoder_wrapper->seek_table.points[i].frame_samples)) goto end_;
1162                 }
1163         }
1164
1165 end_:
1166         fclose(f);
1167         return;
1168 }
1169
1170 FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data)
1171 {
1172         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1173         const unsigned encoded_bytes = encoder_wrapper->verify_fifo.encoded_bytes;
1174         (void)decoder;
1175
1176         if(encoded_bytes <= *bytes) {
1177                 *bytes = encoded_bytes;
1178                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
1179         }
1180         else {
1181                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
1182                 encoder_wrapper->verify_fifo.encoded_signal += *bytes;
1183                 encoder_wrapper->verify_fifo.encoded_bytes -= *bytes;
1184         }
1185
1186         return FLAC__STREAM_DECODER_READ_CONTINUE;
1187 }
1188
1189 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data)
1190 {
1191         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1192         unsigned channel, l, r;
1193         const unsigned channels = FLAC__stream_decoder_get_channels(decoder);
1194         const unsigned bytes_per_block = sizeof(FLAC__int32) * FLAC__stream_decoder_get_blocksize(decoder);
1195
1196         for(channel = 0; channel < channels; channel++) {
1197                 if(0 != memcmp(buffer[channel], encoder_wrapper->verify_fifo.original[channel], bytes_per_block)) {
1198                         unsigned sample = 0;
1199                         int expect = 0, got = 0;
1200                         fprintf(stderr, "\n%s: ERROR: mismatch in decoded data, verify FAILED!\n", encoder_wrapper->inbasefilename);
1201                         fprintf(stderr, "       Please submit a bug report to\n");
1202                         fprintf(stderr, "           http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
1203                         fprintf(stderr, "       Make sure to include an email contact in the comment and/or use the\n");
1204                         fprintf(stderr, "       \"Monitor\" feature to monitor the bug status.\n");
1205                         for(l = 0, r = FLAC__stream_decoder_get_blocksize(decoder); l < r; l++) {
1206                                 if(buffer[channel][l] != encoder_wrapper->verify_fifo.original[channel][l]) {
1207                                         sample = l;
1208                                         expect = (int)encoder_wrapper->verify_fifo.original[channel][l];
1209                                         got = (int)buffer[channel][l];
1210                                         break;
1211                                 }
1212                         }
1213                         FLAC__ASSERT(l < r);
1214                         FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
1215                         fprintf(stderr, "       Absolute sample=%u, frame=%u, channel=%u, sample=%u, expected %d, got %d\n", (unsigned)frame->header.number.sample_number + sample, (unsigned)frame->header.number.sample_number / FLAC__stream_decoder_get_blocksize(decoder), channel, sample, expect, got); /*@@@ WATCHOUT: 4GB limit */
1216                         return FLAC__STREAM_DECODER_WRITE_ABORT;
1217                 }
1218         }
1219         /* dequeue the frame from the fifo */
1220         for(channel = 0; channel < channels; channel++) {
1221                 for(l = 0, r = frame->header.blocksize; r < encoder_wrapper->verify_fifo.tail; l++, r++) {
1222                         encoder_wrapper->verify_fifo.original[channel][l] = encoder_wrapper->verify_fifo.original[channel][r];
1223                 }
1224         }
1225         encoder_wrapper->verify_fifo.tail -= frame->header.blocksize;
1226         return FLAC__STREAM_DECODER_WRITE_CONTINUE;
1227 }
1228
1229 void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
1230 {
1231         (void)decoder;
1232         (void)metadata;
1233         (void)client_data;
1234 }
1235
1236 void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
1237 {
1238         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
1239         (void)decoder;
1240         fprintf(stderr, "\n%s: ERROR: verification decoder returned error %d:%s\n", encoder_wrapper->inbasefilename, status, FLAC__StreamDecoderErrorStatusString[status]);
1241 }
1242
1243 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
1244 {
1245 #if defined _MSC_VER || defined __MINGW32__
1246         /* with VC++ you have to spoon feed it the casting */
1247         const double progress = (double)(FLAC__int64)encoder_wrapper->samples_written / (double)(FLAC__int64)encoder_wrapper->total_samples_to_encode;
1248         const double ratio = (double)(FLAC__int64)encoder_wrapper->bytes_written / ((double)(FLAC__int64)encoder_wrapper->unencoded_size * progress);
1249 #else
1250         const double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
1251         const double ratio = (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress);
1252 #endif
1253
1254         if(encoder_wrapper->samples_written == encoder_wrapper->total_samples_to_encode) {
1255                 fprintf(stderr, "\r%s:%s wrote %u bytes, ratio=%0.3f",
1256                         encoder_wrapper->inbasefilename,
1257                         encoder_wrapper->verify? (encoder_wrapper->verify_fifo.result == FLAC__VERIFY_OK? " Verify OK," : " Verify FAILED!") : "",
1258                         (unsigned)encoder_wrapper->bytes_written,
1259                         ratio
1260                 );
1261         }
1262         else {
1263                 fprintf(stderr, "\r%s: %u%% complete, ratio=%0.3f", encoder_wrapper->inbasefilename, (unsigned)floor(progress * 100.0 + 0.5), ratio);
1264         }
1265 }
1266
1267 FLAC__bool read_little_endian_uint16(FILE *f, FLAC__uint16 *val, FLAC__bool eof_ok, const char *fn)
1268 {
1269         size_t bytes_read = fread(val, 1, 2, f);
1270
1271         if(bytes_read == 0) {
1272                 if(!eof_ok) {
1273                         fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1274                         return false;
1275                 }
1276                 else
1277                         return true;
1278         }
1279         else if(bytes_read < 2) {
1280                 fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1281                 return false;
1282         }
1283         else {
1284                 if(is_big_endian_host) {
1285                         FLAC__byte tmp, *b = (FLAC__byte*)val;
1286                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
1287                 }
1288                 return true;
1289         }
1290 }
1291
1292 FLAC__bool read_little_endian_uint32(FILE *f, FLAC__uint32 *val, FLAC__bool eof_ok, const char *fn)
1293 {
1294         size_t bytes_read = fread(val, 1, 4, f);
1295
1296         if(bytes_read == 0) {
1297                 if(!eof_ok) {
1298                         fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1299                         return false;
1300                 }
1301                 else
1302                         return true;
1303         }
1304         else if(bytes_read < 4) {
1305                 fprintf(stderr, "%s: ERROR: unexpected EOF\n", fn);
1306                 return false;
1307         }
1308         else {
1309                 if(is_big_endian_host) {
1310                         FLAC__byte tmp, *b = (FLAC__byte*)val;
1311                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
1312                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
1313                 }
1314                 return true;
1315         }
1316 }
1317
1318 FLAC__bool write_big_endian_uint16(FILE *f, FLAC__uint16 val)
1319 {
1320         if(!is_big_endian_host) {
1321                 FLAC__byte *b = (FLAC__byte *)&val, tmp;
1322                 tmp = b[0]; b[0] = b[1]; b[1] = tmp;
1323         }
1324         return fwrite(&val, 1, 2, f) == 2;
1325 }
1326
1327 FLAC__bool write_big_endian_uint64(FILE *f, FLAC__uint64 val)
1328 {
1329         if(!is_big_endian_host) {
1330                 FLAC__byte *b = (FLAC__byte *)&val, tmp;
1331                 tmp = b[0]; b[0] = b[7]; b[7] = tmp;
1332                 tmp = b[1]; b[1] = b[6]; b[6] = tmp;
1333                 tmp = b[2]; b[2] = b[5]; b[5] = tmp;
1334                 tmp = b[3]; b[3] = b[4]; b[4] = tmp;
1335         }
1336         return fwrite(&val, 1, 8, f) == 8;
1337 }