document GCC compiler bug that produces false warning
[flac.git] / src / flac / encode.c
1 /* flac - Command-line FLAC encoder/decoder
2  * Copyright (C) 2000,2001  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 /*@@@ need to "_finish()" the verify decoder */
20
21 #include <assert.h>
22 #if defined _WIN32 && !defined __CYGWIN__
23 /* where MSVC puts unlink() */
24 # include <io.h>
25 #else
26 # include <unistd.h>
27 #endif
28 #include <stdio.h> /* for FILE et al. */
29 #include <stdlib.h> /* for malloc */
30 #include <string.h> /* for strcmp() */
31 #include "FLAC/all.h"
32 #include "encode.h"
33
34 #ifdef min
35 #undef min
36 #endif
37 #define min(x,y) ((x)<(y)?(x):(y))
38
39 #define CHUNK_OF_SAMPLES 2048
40
41 typedef enum {
42         FLAC__VERIFY_OK,
43         FLAC__VERIFY_FAILED_IN_FRAME,
44         FLAC__VERIFY_FAILED_IN_METADATA
45 } verify_code;
46
47 static const char *verify_code_string[] = {
48         "FLAC__VERIFY_OK",
49         "FLAC__VERIFY_FAILED_IN_FRAME",
50         "FLAC__VERIFY_FAILED_IN_METADATA"
51 };
52
53 typedef struct {
54         int32 *original[FLAC__MAX_CHANNELS];
55         unsigned size; /* of each original[] in samples */
56         unsigned tail; /* in wide samples */
57         const byte *encoded_signal;
58         unsigned encoded_signal_capacity;
59         unsigned encoded_bytes;
60         bool into_frames;
61         verify_code result;
62         FLAC__StreamDecoder *decoder;
63 } verify_fifo_struct;
64
65 typedef struct {
66         FILE *fout;
67         const char *outfile;
68         FLAC__Encoder *encoder;
69         bool verify;
70         bool verbose;
71         uint64 unencoded_size;
72         uint64 total_samples_to_encode;
73         uint64 bytes_written;
74         uint64 samples_written;
75         uint64 stream_offset; /* i.e. number of bytes before the first byte of the the first frame's header */
76         unsigned current_frame;
77         verify_fifo_struct verify_fifo;
78         FLAC__StreamMetaData_SeekTable seek_table;
79         unsigned first_seek_point_to_check;
80 } encoder_wrapper_struct;
81
82 static bool is_big_endian_host;
83
84 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*((FLAC__MAX_BITS_PER_SAMPLE+7)/8)];
85 static signed char *scbuffer = (signed char *)ucbuffer;
86 static uint16 *usbuffer = (uint16 *)ucbuffer;
87 static int16 *ssbuffer = (int16 *)ucbuffer;
88
89 static int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
90 static int32 *input[FLAC__MAX_CHANNELS];
91
92 /* local routines */
93 static bool init(encoder_wrapper_struct *encoder_wrapper);
94 static bool init_encoder(bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned rice_optimization_level, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned channels, unsigned bps, unsigned sample_rate, unsigned padding, char *requested_seek_points, int num_requested_seek_points, encoder_wrapper_struct *encoder_wrapper);
95 static bool convert_to_seek_table(char *requested_seek_points, int num_requested_seek_points, uint64 stream_samples, unsigned blocksize, FLAC__StreamMetaData_SeekTable *seek_table);
96 static void append_point_to_seek_table(FLAC__StreamMetaData_SeekTable *seek_table, uint64 sample, uint64 stream_samples, uint64 blocksize);
97 static int seekpoint_compare(const FLAC__StreamMetaData_SeekPoint *l, const FLAC__StreamMetaData_SeekPoint *r);
98 static void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper);
99 static FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
100 static void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
101 static FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data);
102 static FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data);
103 static void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
104 static void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
105 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
106 static bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok);
107 static bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok);
108 static bool write_big_endian_uint16(FILE *f, uint16 val);
109 static bool write_big_endian_uint64(FILE *f, uint64 val);
110
111 int encode_wav(const char *infile, const char *outfile, bool verbose, uint64 skip, bool verify, bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned rice_optimization_level, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned padding, char *requested_seek_points, int num_requested_seek_points)
112 {
113         encoder_wrapper_struct encoder_wrapper;
114         FILE *fin;
115         bool is_unsigned_samples;
116         unsigned channels, bps, sample_rate, data_bytes;
117         size_t bytes_per_wide_sample, bytes_read;
118         uint16 x;
119         uint32 xx;
120
121         encoder_wrapper.encoder = 0;
122         encoder_wrapper.verify = verify;
123         encoder_wrapper.verbose = verbose;
124         encoder_wrapper.bytes_written = 0;
125         encoder_wrapper.samples_written = 0;
126         encoder_wrapper.outfile = outfile;
127         encoder_wrapper.seek_table.points = 0;
128         encoder_wrapper.first_seek_point_to_check = 0;
129
130         if(0 == strcmp(infile, "-")) {
131                 fin = stdin;
132         }
133         else {
134                 if(0 == (fin = fopen(infile, "rb"))) {
135                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
136                         return false;
137                 }
138         }
139         if(0 == strcmp(outfile, "-")) {
140                 encoder_wrapper.fout = stdout;
141         }
142         else {
143                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
144                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
145                         fclose(fin);
146                         return false;
147                 }
148         }
149
150         if(!init(&encoder_wrapper))
151                 goto wav_abort_;
152
153         /*
154          * check the RIFF chunk
155          */
156         if(!read_little_endian_uint32(fin, &xx, false))
157                 goto wav_abort_;
158         if(xx != 0x46464952) { /* "RIFF" */
159                 fprintf(stderr, "ERROR: no RIFF header\n");
160                 goto wav_abort_;
161         }
162         if(!read_little_endian_uint32(fin, &xx, false))
163                 goto wav_abort_;
164
165         /*
166          * now process the WAVE chunk
167          */
168         if(!read_little_endian_uint32(fin, &xx, true))
169                 goto wav_end_;
170         if(xx != 0x45564157) { /* "WAVE" */
171                 fprintf(stderr, "ERROR: no WAVE header\n");
172                 goto wav_abort_;
173         }
174
175         /* do the format sub-chunk */
176         if(!read_little_endian_uint32(fin, &xx, false))
177                 goto wav_abort_;
178         if(xx != 0x20746d66) { /* "fmt " */
179                 fprintf(stderr, "ERROR: no format sub-chunk\n");
180                 goto wav_abort_;
181         }
182         /* fmt chunk size */
183         if(!read_little_endian_uint32(fin, &xx, false))
184                 goto wav_abort_;
185         if(xx != 16) {
186                 fprintf(stderr, "ERROR: unsupported chunk\n");
187                 goto wav_abort_;
188         }
189         /* compression code */
190         if(!read_little_endian_uint16(fin, &x, false))
191                 goto wav_abort_;
192         if(x != 1) {
193                 fprintf(stderr, "ERROR: unsupported compression type %u\n", (unsigned)x);
194                 goto wav_abort_;
195         }
196         /* number of channels */
197         if(!read_little_endian_uint16(fin, &x, false))
198                 goto wav_abort_;
199         if(x == 0 || x > FLAC__MAX_CHANNELS) {
200                 fprintf(stderr, "ERROR: unsupported number channels %u\n", (unsigned)x);
201                 goto wav_abort_;
202         }
203         channels = x;
204         /* sample rate */
205         if(!read_little_endian_uint32(fin, &xx, false))
206                 goto wav_abort_;
207         if(xx == 0 || xx > FLAC__MAX_SAMPLE_RATE) {
208                 fprintf(stderr, "ERROR: unsupported sample rate %u\n", (unsigned)xx);
209                 goto wav_abort_;
210         }
211         sample_rate = xx;
212         /* avg bytes per second (ignored) */
213         if(!read_little_endian_uint32(fin, &xx, false))
214                 goto wav_abort_;
215         /* block align (ignored) */
216         if(!read_little_endian_uint16(fin, &x, false))
217                 goto wav_abort_;
218         /* bits per sample */
219         if(!read_little_endian_uint16(fin, &x, false))
220                 goto wav_abort_;
221         if(x != 8 && x != 16) {
222                 fprintf(stderr, "ERROR: unsupported bits per sample %u\n", (unsigned)x);
223                 goto wav_abort_;
224         }
225         bps = x;
226         is_unsigned_samples = (x == 8);
227
228         /* do the data sub-chunk */
229         if(!read_little_endian_uint32(fin, &xx, false))
230                 goto wav_abort_;
231         if(xx != 0x61746164) { /* "data" */
232                 fprintf(stderr, "ERROR: no data sub-chunk\n");
233                 goto wav_abort_;
234         }
235         /* data size */
236         if(!read_little_endian_uint32(fin, &xx, false))
237                 goto wav_abort_;
238         data_bytes = xx;
239
240         bytes_per_wide_sample = channels * (bps >> 3);
241
242         if(skip > 0) {
243                 if(fin != stdin) {
244                         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_CUR)) {
245                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
246                                 goto wav_abort_;
247                         }
248                 }
249                 else {
250                         int64 left;
251                         unsigned need;
252                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
253                                 need = min(left, CHUNK_OF_SAMPLES);
254                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, fin) < need) {
255                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
256                                         goto wav_abort_;
257                                 }
258                         }
259                 }
260         }
261
262         encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample - skip;
263         encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44; /* 44 for the size of the WAV headers */
264
265         if(!init_encoder(lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, rice_optimization_level, max_lpc_order, blocksize, qlp_coeff_precision, channels, bps, sample_rate, padding, requested_seek_points, num_requested_seek_points, &encoder_wrapper))
266                 goto wav_abort_;
267
268         encoder_wrapper.verify_fifo.into_frames = true;
269
270         while(data_bytes > 0) {
271                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
272                 if(bytes_read == 0) {
273                         if(ferror(fin)) {
274                                 fprintf(stderr, "ERROR reading from %s\n", infile);
275                                 goto wav_abort_;
276                         }
277                         else if(feof(fin))
278                                 break;
279                 }
280                 else {
281                         if(bytes_read > data_bytes)
282                                 bytes_read = data_bytes; /* chop off anything after the end of the data chunk */
283                         if(bytes_read % bytes_per_wide_sample != 0) {
284                                 fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
285                                 goto wav_abort_;
286                         }
287                         else {
288                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
289                                 format_input(wide_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
290
291                                 /* 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: */
292                                 if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
293                                         fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
294                                         goto wav_abort_;
295                                 }
296                                 data_bytes -= bytes_read;
297                         }
298                 }
299         }
300
301 wav_end_:
302         if(encoder_wrapper.encoder) {
303                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
304                         FLAC__encoder_finish(encoder_wrapper.encoder);
305                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
306         }
307         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
308                 print_stats(&encoder_wrapper);
309                 printf("\n");
310         }
311         if(0 != encoder_wrapper.seek_table.points)
312                 free(encoder_wrapper.seek_table.points);
313         if(verify) {
314                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
315                         printf("Verify FAILED! (%s)  Do not use %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfile);
316                         return 1;
317                 }
318                 else {
319                         printf("Verify succeeded\n");
320                 }
321         }
322         fclose(fin);
323         return 0;
324 wav_abort_:
325         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
326                 printf("\n");
327         if(encoder_wrapper.encoder) {
328                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
329                         FLAC__encoder_finish(encoder_wrapper.encoder);
330                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
331         }
332         if(0 != encoder_wrapper.seek_table.points)
333                 free(encoder_wrapper.seek_table.points);
334         if(verify) {
335                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
336                         printf("Verify FAILED! (%s)  Do not use %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfile);
337                         return 1;
338                 }
339                 else {
340                         printf("Verify succeeded\n");
341                 }
342         }
343         fclose(fin);
344         unlink(outfile);
345         return 1;
346 }
347
348 int encode_raw(const char *infile, const char *outfile, bool verbose, uint64 skip, bool verify, bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned rice_optimization_level, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned padding, char *requested_seek_points, int num_requested_seek_points, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, unsigned sample_rate)
349 {
350         encoder_wrapper_struct encoder_wrapper;
351         FILE *fin;
352         size_t bytes_read;
353         const size_t bytes_per_wide_sample = channels * (bps >> 3);
354
355         encoder_wrapper.encoder = 0;
356         encoder_wrapper.verify = verify;
357         encoder_wrapper.verbose = verbose;
358         encoder_wrapper.bytes_written = 0;
359         encoder_wrapper.samples_written = 0;
360         encoder_wrapper.outfile = outfile;
361         encoder_wrapper.seek_table.points = 0;
362         encoder_wrapper.first_seek_point_to_check = 0;
363
364         if(0 == strcmp(infile, "-")) {
365                 fin = stdin;
366         }
367         else {
368                 if(0 == (fin = fopen(infile, "rb"))) {
369                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
370                         return false;
371                 }
372         }
373         if(0 == strcmp(outfile, "-")) {
374                 encoder_wrapper.fout = stdout;
375         }
376         else {
377                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
378                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
379                         fclose(fin);
380                         return false;
381                 }
382         }
383
384         if(!init(&encoder_wrapper))
385                 goto raw_abort_;
386
387         /* get the file length */
388         if(0 != fseek(fin, 0, SEEK_END)) {
389                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
390         }
391         else {
392                 long filesize;
393                 fflush(fin);
394                 if(-1 == (filesize = ftell(fin))) {
395                         encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
396                 }
397                 else {
398                         encoder_wrapper.unencoded_size = filesize - skip * bytes_per_wide_sample;
399                         encoder_wrapper.total_samples_to_encode = filesize / bytes_per_wide_sample - skip;
400                 }
401         }
402
403         if(skip > 0) {
404                 if(fin != stdin) {
405                         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_SET)) {
406                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
407                                 goto raw_abort_;
408                         }
409                 }
410                 else {
411                         int64 left;
412                         unsigned need;
413                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
414                                 need = min(left, CHUNK_OF_SAMPLES);
415                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, fin) < need) {
416                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
417                                         goto raw_abort_;
418                                 }
419                         }
420                 }
421         }
422         else {
423                 fseek(fin, 0, SEEK_SET);
424         }
425
426         if(!init_encoder(lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, rice_optimization_level, max_lpc_order, blocksize, qlp_coeff_precision, channels, bps, sample_rate, padding, requested_seek_points, num_requested_seek_points, &encoder_wrapper))
427                 goto raw_abort_;
428
429         encoder_wrapper.verify_fifo.into_frames = true;
430
431         while(!feof(fin)) {
432                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
433                 if(bytes_read == 0) {
434                         if(ferror(fin)) {
435                                 fprintf(stderr, "ERROR reading from %s\n", infile);
436                                 goto raw_abort_;
437                         }
438                 }
439                 else if(bytes_read % bytes_per_wide_sample != 0) {
440                         fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
441                         goto raw_abort_;
442                 }
443                 else {
444                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
445                         format_input(wide_samples, is_big_endian, is_unsigned_samples, channels, bps, &encoder_wrapper);
446
447                         /* 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: */
448                         if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
449                                 fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
450                                 goto raw_abort_;
451                         }
452                 }
453         }
454
455         if(encoder_wrapper.encoder) {
456                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
457                         FLAC__encoder_finish(encoder_wrapper.encoder);
458                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
459         }
460         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
461                 print_stats(&encoder_wrapper);
462                 printf("\n");
463         }
464         if(0 != encoder_wrapper.seek_table.points)
465                 free(encoder_wrapper.seek_table.points);
466         if(verify) {
467                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
468                         printf("Verify FAILED! (%s)  Do not use %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfile);
469                         return 1;
470                 }
471                 else {
472                         printf("Verify succeeded\n");
473                 }
474         }
475         fclose(fin);
476         return 0;
477 raw_abort_:
478         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
479                 printf("\n");
480         if(encoder_wrapper.encoder) {
481                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
482                         FLAC__encoder_finish(encoder_wrapper.encoder);
483                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
484         }
485         if(0 != encoder_wrapper.seek_table.points)
486                 free(encoder_wrapper.seek_table.points);
487         if(verify) {
488                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
489                         printf("Verify FAILED! (%s)  Do not use %s\n", verify_code_string[encoder_wrapper.verify_fifo.result], outfile);
490                         return 1;
491                 }
492                 else {
493                         printf("Verify succeeded\n");
494                 }
495         }
496         fclose(fin);
497         unlink(outfile);
498         return 1;
499 }
500
501 bool init(encoder_wrapper_struct *encoder_wrapper)
502 {
503         unsigned i;
504         uint32 test = 1;
505
506         is_big_endian_host = (*((byte*)(&test)))? false : true;
507
508         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
509                 input[i] = &(in[i][0]);
510
511         encoder_wrapper->encoder = FLAC__encoder_get_new_instance();
512         if(0 == encoder_wrapper->encoder) {
513                 fprintf(stderr, "ERROR creating the encoder instance\n");
514                 return false;
515         }
516
517         return true;
518 }
519
520 bool init_encoder(bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned rice_optimization_level, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned channels, unsigned bps, unsigned sample_rate, unsigned padding, char *requested_seek_points, int num_requested_seek_points, encoder_wrapper_struct *encoder_wrapper)
521 {
522         unsigned i;
523
524         if(channels != 2)
525                 do_mid_side = loose_mid_side = false;
526
527         if(encoder_wrapper->verify) {
528                 /* set up the fifo which will hold the original signal to compare against */
529                 encoder_wrapper->verify_fifo.size = blocksize + CHUNK_OF_SAMPLES;
530                 for(i = 0; i < channels; i++) {
531                         if(0 == (encoder_wrapper->verify_fifo.original[i] = (int32*)malloc(sizeof(int32) * encoder_wrapper->verify_fifo.size))) {
532                                 fprintf(stderr, "ERROR allocating verify buffers\n");
533                                 return false;
534                         }
535                 }
536                 encoder_wrapper->verify_fifo.tail = 0;
537                 encoder_wrapper->verify_fifo.into_frames = false;
538                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_OK;
539
540                 /* set up a stream decoder for verification */
541                 encoder_wrapper->verify_fifo.decoder = FLAC__stream_decoder_get_new_instance();
542                 if(0 == encoder_wrapper->verify_fifo.decoder) {
543                         fprintf(stderr, "ERROR creating the verify decoder instance\n");
544                         return false;
545                 }
546                 if(FLAC__stream_decoder_init(encoder_wrapper->verify_fifo.decoder, verify_read_callback, verify_write_callback, verify_metadata_callback, verify_error_callback, encoder_wrapper) != FLAC__STREAM_DECODER_SEARCH_FOR_METADATA) {
547                         fprintf(stderr, "ERROR initializing decoder, state = %d:%s\n", encoder_wrapper->verify_fifo.decoder->state, FLAC__StreamDecoderStateString[encoder_wrapper->verify_fifo.decoder->state]);
548                         return false;
549                 }
550         }
551
552         if(!convert_to_seek_table(requested_seek_points, num_requested_seek_points, encoder_wrapper->total_samples_to_encode, blocksize, &encoder_wrapper->seek_table)) {
553                 fprintf(stderr, "ERROR allocating seek table\n");
554                 return false;
555         }
556
557         if(encoder_wrapper->verbose && encoder_wrapper->seek_table.num_points > 0) {
558                 if(encoder_wrapper->total_samples_to_encode > 0)
559                         printf("seek points (%llu total samples):", encoder_wrapper->total_samples_to_encode);
560                 else
561                         printf("seek points (total samples unknown):");
562                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
563                         if(encoder_wrapper->seek_table.points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER)
564                                 printf(" %llu", encoder_wrapper->seek_table.points[i].sample_number);
565                         else
566                                 printf(" X");
567                 }
568                 printf("\n");
569         }
570
571         encoder_wrapper->encoder->streamable_subset = !lax;
572         encoder_wrapper->encoder->channels = channels;
573         encoder_wrapper->encoder->bits_per_sample = bps;
574         encoder_wrapper->encoder->sample_rate = sample_rate;
575         encoder_wrapper->encoder->blocksize = blocksize;
576         encoder_wrapper->encoder->qlp_coeff_precision = qlp_coeff_precision;
577         encoder_wrapper->encoder->max_lpc_order = max_lpc_order;
578         encoder_wrapper->encoder->do_mid_side_stereo = do_mid_side;
579         encoder_wrapper->encoder->loose_mid_side_stereo = loose_mid_side;
580         encoder_wrapper->encoder->do_exhaustive_model_search = do_exhaustive_model_search;
581         encoder_wrapper->encoder->do_qlp_coeff_prec_search = do_qlp_coeff_prec_search;
582         encoder_wrapper->encoder->rice_optimization_level = rice_optimization_level;
583         encoder_wrapper->encoder->total_samples_estimate = encoder_wrapper->total_samples_to_encode;
584         encoder_wrapper->encoder->seek_table = (encoder_wrapper->seek_table.num_points > 0)? &encoder_wrapper->seek_table : 0;
585         encoder_wrapper->encoder->padding = padding;
586
587         if(FLAC__encoder_init(encoder_wrapper->encoder, write_callback, metadata_callback, encoder_wrapper) != FLAC__ENCODER_OK) {
588                 fprintf(stderr, "ERROR initializing encoder, state = %d:%s\n", encoder_wrapper->encoder->state, FLAC__EncoderStateString[encoder_wrapper->encoder->state]);
589                 return false;
590         }
591
592         /* the above call write all the metadata, so we save the stream offset now */
593         encoder_wrapper->stream_offset = encoder_wrapper->bytes_written;
594
595         return true;
596 }
597
598 bool convert_to_seek_table(char *requested_seek_points, int num_requested_seek_points, uint64 stream_samples, unsigned blocksize, FLAC__StreamMetaData_SeekTable *seek_table)
599 {
600         unsigned i, j, real_points, placeholders;
601         char *pt = requested_seek_points, *q;
602         bool first;
603
604         seek_table->num_points = 0;
605
606         if(num_requested_seek_points == 0)
607                 return true;
608
609         if(num_requested_seek_points < 0) {
610                 strcpy(requested_seek_points, "100x<");
611                 num_requested_seek_points = 1;
612         }
613
614         /* first count how many individual seek point we may need */
615         real_points = placeholders = 0;
616         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
617                 q = strchr(pt, '<');
618                 assert(0 != q);
619                 *q = '\0';
620
621                 if(0 == strcmp(pt, "X")) { /* -S X */
622                         placeholders++;
623                 }
624                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
625                         if(stream_samples > 0) /* we can only do these if we know the number of samples to encode up front */
626                                 real_points += (unsigned)atoi(pt);
627                 }
628                 else { /* -S # */
629                         real_points++;
630                 }
631                 *q++ = '<';
632
633                 pt = q;
634         }
635         pt = requested_seek_points;
636
637         /* make some space */
638         if(0 == (seek_table->points = (FLAC__StreamMetaData_SeekPoint*)malloc(sizeof(FLAC__StreamMetaData_SeekPoint) * (real_points+placeholders))))
639                 return false;
640
641         /* initialize the seek_table.  we set frame_samples to zero to signify the points have not yet been hit by a frame write yet. */
642         for(i = 0; i < real_points+placeholders; i++) {
643                 seek_table->points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
644                 seek_table->points[i].stream_offset = 0;
645                 seek_table->points[i].frame_samples = 0;
646         }
647
648         for(i = 0; i < (unsigned)num_requested_seek_points; i++) {
649                 q = strchr(pt, '<');
650                 assert(0 != q);
651                 *q++ = '\0';
652
653                 if(0 == strcmp(pt, "X")) { /* -S X */
654                         ; /* we append placeholders later */
655                 }
656                 else if(pt[strlen(pt)-1] == 'x') { /* -S #x */
657                         if(stream_samples > 0) { /* we can only do these if we know the number of samples to encode up front */
658                                 unsigned j, n;
659                                 n = (unsigned)atoi(pt);
660                                 for(j = 0; j < n; j++)
661                                         append_point_to_seek_table(seek_table, stream_samples * (uint64)j / (uint64)n, stream_samples, blocksize);
662                         }
663                 }
664                 else { /* -S # */
665                         append_point_to_seek_table(seek_table, (uint64)atoi(pt), stream_samples, blocksize);
666                 }
667
668                 pt = q;
669         }
670
671         /* sort the seekpoints */
672         qsort(seek_table->points, seek_table->num_points, sizeof(FLAC__StreamMetaData_SeekPoint), (int (*)(const void *, const void *))seekpoint_compare);
673
674         /* uniqify the seekpoints */
675         first = false;
676         for(i = j = 0; i < seek_table->num_points; i++) {
677                 if(!first) {
678                         if(seek_table->points[i].sample_number == seek_table->points[j-1].sample_number)
679                                 continue;
680                 }
681                 first = false;
682                 seek_table->points[j++] = seek_table->points[i];
683         }
684         seek_table->num_points = j;
685
686         /* append placeholders */
687         for(i = 0, j = seek_table->num_points; i < placeholders; i++, j++)
688                 seek_table->points[j].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
689         seek_table->num_points += placeholders;
690
691         return true;
692 }
693
694 void append_point_to_seek_table(FLAC__StreamMetaData_SeekTable *seek_table, uint64 sample, uint64 stream_samples, uint64 blocksize)
695 {
696         const uint64 target_sample = (sample / blocksize) * blocksize;
697
698         if(stream_samples == 0 || target_sample < stream_samples)
699                 seek_table->points[seek_table->num_points++].sample_number = target_sample;
700 }
701
702 int seekpoint_compare(const FLAC__StreamMetaData_SeekPoint *l, const FLAC__StreamMetaData_SeekPoint *r)
703 {
704         /* we don't just 'return l->sample_number - r->sample_number' since the result (int64) might overflow an 'int' */
705         if(l->sample_number == r->sample_number)
706                 return 0;
707         else if(l->sample_number < r->sample_number)
708                 return -1;
709         else
710                 return 1;
711 }
712
713 void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper)
714 {
715         unsigned wide_sample, sample, channel, byte;
716
717         if(bps == 8) {
718                 if(is_unsigned_samples) {
719                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
720                                 for(channel = 0; channel < channels; channel++, sample++)
721                                         input[channel][wide_sample] = (int32)ucbuffer[sample] - 0x80;
722                 }
723                 else {
724                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
725                                 for(channel = 0; channel < channels; channel++, sample++)
726                                         input[channel][wide_sample] = (int32)scbuffer[sample];
727                 }
728         }
729         else if(bps == 16) {
730                 if(is_big_endian != is_big_endian_host) {
731                         unsigned char tmp;
732                         const unsigned bytes = wide_samples * channels * (bps >> 3);
733                         for(byte = 0; byte < bytes; byte += 2) {
734                                 tmp = ucbuffer[byte];
735                                 ucbuffer[byte] = ucbuffer[byte+1];
736                                 ucbuffer[byte+1] = tmp;
737                         }
738                 }
739                 if(is_unsigned_samples) {
740                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
741                                 for(channel = 0; channel < channels; channel++, sample++)
742                                         input[channel][wide_sample] = (int32)usbuffer[sample] - 0x8000;
743                 }
744                 else {
745                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
746                                 for(channel = 0; channel < channels; channel++, sample++)
747                                         input[channel][wide_sample] = (int32)ssbuffer[sample];
748                 }
749         }
750         else if(bps == 24) {
751                 if(!is_big_endian) {
752                         unsigned char tmp;
753                         const unsigned bytes = wide_samples * channels * (bps >> 3);
754                         for(byte = 0; byte < bytes; byte += 3) {
755                                 tmp = ucbuffer[byte];
756                                 ucbuffer[byte] = ucbuffer[byte+2];
757                                 ucbuffer[byte+2] = tmp;
758                         }
759                 }
760                 if(is_unsigned_samples) {
761                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
762                                 for(channel = 0; channel < channels; channel++, sample++) {
763                                         input[channel][wide_sample]  = ucbuffer[byte++]; input[channel][wide_sample] <<= 8;
764                                         input[channel][wide_sample] |= ucbuffer[byte++]; input[channel][wide_sample] <<= 8;
765                                         input[channel][wide_sample] |= ucbuffer[byte++];
766                                         input[channel][wide_sample] -= 0x800000;
767                                 }
768                 }
769                 else {
770                         for(byte = sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
771                                 for(channel = 0; channel < channels; channel++, sample++) {
772                                         input[channel][wide_sample]  = scbuffer[byte++]; input[channel][wide_sample] <<= 8;
773                                         input[channel][wide_sample] |= ucbuffer[byte++]; input[channel][wide_sample] <<= 8;
774                                         input[channel][wide_sample] |= ucbuffer[byte++];
775                                 }
776                 }
777         }
778         else {
779                 assert(0);
780         }
781
782         if(encoder_wrapper->verify) {
783                 for(channel = 0; channel < channels; channel++)
784                         memcpy(&encoder_wrapper->verify_fifo.original[channel][encoder_wrapper->verify_fifo.tail], &input[channel][0], sizeof(int32) * wide_samples);
785                 encoder_wrapper->verify_fifo.tail += wide_samples;
786                 assert(encoder_wrapper->verify_fifo.tail <= encoder_wrapper->verify_fifo.size);
787         }
788 }
789
790 FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
791 {
792         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
793         unsigned mask = (encoder->do_exhaustive_model_search || encoder->do_qlp_coeff_prec_search)? 0x07 : 0x1f;
794
795         /* 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) */
796         if(encoder_wrapper->stream_offset > 0 && encoder_wrapper->seek_table.num_points > 0) {
797                 uint64 current_sample = (uint64)current_frame * (uint64)encoder->blocksize, test_sample;
798                 unsigned i;
799                 for(i = encoder_wrapper->first_seek_point_to_check; i < encoder_wrapper->seek_table.num_points; i++) {
800                         test_sample = encoder_wrapper->seek_table.points[i].sample_number;
801                         if(test_sample > current_sample) {
802                                 break;
803                         }
804                         else if(test_sample == current_sample) {
805                                 encoder_wrapper->seek_table.points[i].stream_offset = encoder_wrapper->bytes_written - encoder_wrapper->stream_offset;
806                                 encoder_wrapper->seek_table.points[i].frame_samples = encoder->blocksize;
807                                 encoder_wrapper->first_seek_point_to_check++;
808 fprintf(stderr,"\nHIT seek point %llu at frame %u, stream_offset = %llu, first_frame_offset = %llu\n",encoder_wrapper->seek_table.points[i].sample_number,current_frame,encoder_wrapper->seek_table.points[i].stream_offset,encoder_wrapper->stream_offset);
809                                 break;
810                         }
811                         else {
812                                 encoder_wrapper->first_seek_point_to_check++;
813                         }
814                 }
815         }
816
817         encoder_wrapper->bytes_written += bytes;
818         encoder_wrapper->samples_written += samples;
819         encoder_wrapper->current_frame = current_frame;
820
821         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
822                 print_stats(encoder_wrapper);
823
824         if(encoder_wrapper->verify) {
825                 encoder_wrapper->verify_fifo.encoded_signal = buffer;
826                 encoder_wrapper->verify_fifo.encoded_bytes = bytes;
827                 if(encoder_wrapper->verify_fifo.into_frames) {
828                         if(!FLAC__stream_decoder_process_one_frame(encoder_wrapper->verify_fifo.decoder)) {
829                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_FRAME;
830                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
831                         }
832                 }
833                 else {
834                         if(!FLAC__stream_decoder_process_metadata(encoder_wrapper->verify_fifo.decoder)) {
835                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_METADATA;
836                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
837                         }
838                 }
839         }
840
841         if(fwrite(buffer, sizeof(byte), bytes, encoder_wrapper->fout) == bytes)
842                 return FLAC__ENCODER_WRITE_OK;
843         else
844                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
845 }
846
847 void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data)
848 {
849         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
850         byte b;
851         FILE *f;
852         const uint64 samples = metadata->data.stream_info.total_samples;
853         const unsigned min_framesize = metadata->data.stream_info.min_framesize;
854         const unsigned max_framesize = metadata->data.stream_info.max_framesize;
855
856         assert(metadata->type == FLAC__METADATA_TYPE_STREAMINFO);
857
858         /*
859          * we get called by the encoder when the encoding process has
860          * finished so that we can update the STREAMINFO and SEEKTABLE
861          * blocks.
862          */
863
864         (void)encoder; /* silence compiler warning about unused parameter */
865
866         if(encoder_wrapper->fout == stdout)
867                 return;
868
869         fclose(encoder_wrapper->fout);
870         if(0 == (f = fopen(encoder_wrapper->outfile, "r+b")))
871                 return;
872
873         /* all this is based on intimate knowledge of the stream header
874          * layout, but a change to the header format that would break this
875          * would also break all streams encoded in the previous format.
876          */
877
878         if(-1 == fseek(f, 26, SEEK_SET)) goto samples_;
879         fwrite(metadata->data.stream_info.md5sum, 1, 16, f);
880
881 samples_:
882         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
883         if(fread(&b, 1, 1, f) != 1) goto framesize_;
884         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
885         b = (b & 0xf0) | (byte)((samples >> 32) & 0x0F);
886         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
887         b = (byte)((samples >> 24) & 0xFF);
888         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
889         b = (byte)((samples >> 16) & 0xFF);
890         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
891         b = (byte)((samples >> 8) & 0xFF);
892         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
893         b = (byte)(samples & 0xFF);
894         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
895
896 framesize_:
897         if(-1 == fseek(f, 12, SEEK_SET)) goto seektable_;
898         b = (byte)((min_framesize >> 16) & 0xFF);
899         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
900         b = (byte)((min_framesize >> 8) & 0xFF);
901         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
902         b = (byte)(min_framesize & 0xFF);
903         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
904         b = (byte)((max_framesize >> 16) & 0xFF);
905         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
906         b = (byte)((max_framesize >> 8) & 0xFF);
907         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
908         b = (byte)(max_framesize & 0xFF);
909         if(fwrite(&b, 1, 1, f) != 1) goto seektable_;
910
911 seektable_:
912         if(encoder_wrapper->seek_table.num_points > 0) {
913                 long pos;
914                 unsigned i;
915
916                 /* convert any unused seek points to placeholders */
917                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
918                         if(encoder_wrapper->seek_table.points[i].sample_number == FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER)
919                                 break;
920                         else if(encoder_wrapper->seek_table.points[i].frame_samples == 0)
921                                 encoder_wrapper->seek_table.points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER;
922                 }
923
924                 /* the offset of the seek table data 'pos' should be after then stream sync and STREAMINFO block and SEEKTABLE header */
925                 pos = (FLAC__STREAM_SYNC_LEN + FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
926                 pos += metadata->length;
927                 pos += (FLAC__STREAM_METADATA_IS_LAST_LEN + FLAC__STREAM_METADATA_TYPE_LEN + FLAC__STREAM_METADATA_LENGTH_LEN) / 8;
928                 if(-1 == fseek(f, pos, SEEK_SET)) goto end_;
929                 for(i = 0; i < encoder_wrapper->seek_table.num_points; i++) {
930                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table.points[i].sample_number)) goto end_;
931                         if(!write_big_endian_uint64(f, encoder_wrapper->seek_table.points[i].stream_offset)) goto end_;
932                         if(!write_big_endian_uint16(f, encoder_wrapper->seek_table.points[i].frame_samples)) goto end_;
933                 }
934         }
935
936 end_:
937         fclose(f);
938         return;
939 }
940
941 FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data)
942 {
943         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
944         const unsigned encoded_bytes = encoder_wrapper->verify_fifo.encoded_bytes;
945         (void)decoder;
946
947         if(encoded_bytes <= *bytes) {
948                 *bytes = encoded_bytes;
949                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
950         }
951         else {
952                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
953                 encoder_wrapper->verify_fifo.encoded_signal += *bytes;
954                 encoder_wrapper->verify_fifo.encoded_bytes -= *bytes;
955         }
956
957         return FLAC__STREAM_DECODER_READ_CONTINUE;
958 }
959
960 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data)
961 {
962         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
963         unsigned channel, l, r;
964
965         for(channel = 0; channel < decoder->channels; channel++) {
966                 if(0 != memcmp(buffer[channel], encoder_wrapper->verify_fifo.original[channel], sizeof(int32) * decoder->blocksize)) {
967                         fprintf(stderr, "\nERROR: mismatch in decoded data, verify FAILED!\n");
968                         fprintf(stderr, "       Please submit a bug report to http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
969                         return FLAC__STREAM_DECODER_WRITE_ABORT;
970                 }
971         }
972         /* dequeue the frame from the fifo */
973         for(channel = 0; channel < decoder->channels; channel++) {
974                 for(l = 0, r = frame->header.blocksize; r < encoder_wrapper->verify_fifo.tail; l++, r++) {
975                         encoder_wrapper->verify_fifo.original[channel][l] = encoder_wrapper->verify_fifo.original[channel][r];
976                 }
977         }
978         encoder_wrapper->verify_fifo.tail -= frame->header.blocksize;
979         return FLAC__STREAM_DECODER_WRITE_CONTINUE;
980 }
981
982 void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
983 {
984         (void)decoder;
985         (void)metadata;
986         (void)client_data;
987 }
988
989 void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
990 {
991         (void)decoder;
992         (void)client_data;
993         fprintf(stderr, "\nERROR: verification decoder returned error %d:%s\n", status, FLAC__StreamDecoderErrorStatusString[status]);
994 }
995
996 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
997 {
998 #ifdef _MSC_VER
999         /* with VC++ you have to spoon feed it the casting */
1000         double progress = (double)(int64)encoder_wrapper->samples_written / (double)(int64)encoder_wrapper->total_samples_to_encode;
1001 #else
1002         double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
1003 #endif
1004         printf("\r%0.2f%% complete: frame %u, wrote %u bytes, %u of %u samples, ratio = %5.3f",
1005                 progress * 100.0, encoder_wrapper->current_frame,
1006                 (unsigned)encoder_wrapper->bytes_written, (unsigned)encoder_wrapper->samples_written, (unsigned)encoder_wrapper->total_samples_to_encode,
1007 #ifdef _MSC_VER
1008                 /* with VC++ you have to spoon feed it the casting */
1009                 (double)(int64)encoder_wrapper->bytes_written / ((double)(int64)encoder_wrapper->unencoded_size * progress)
1010 #else
1011                 (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress)
1012 #endif
1013         );
1014         fflush(stdout);
1015 }
1016
1017 bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok)
1018 {
1019         size_t bytes_read = fread(val, 1, 2, f);
1020
1021         if(bytes_read == 0) {
1022                 if(!eof_ok) {
1023                         fprintf(stderr, "ERROR: unexpected EOF\n");
1024                         return false;
1025                 }
1026                 else
1027                         return true;
1028         }
1029         else if(bytes_read < 2) {
1030                 fprintf(stderr, "ERROR: unexpected EOF\n");
1031                 return false;
1032         }
1033         else {
1034                 if(is_big_endian_host) {
1035                         byte tmp, *b = (byte*)val;
1036                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
1037                 }
1038                 return true;
1039         }
1040 }
1041
1042 bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok)
1043 {
1044         size_t bytes_read = fread(val, 1, 4, f);
1045
1046         if(bytes_read == 0) {
1047                 if(!eof_ok) {
1048                         fprintf(stderr, "ERROR: unexpected EOF\n");
1049                         return false;
1050                 }
1051                 else
1052                         return true;
1053         }
1054         else if(bytes_read < 4) {
1055                 fprintf(stderr, "ERROR: unexpected EOF\n");
1056                 return false;
1057         }
1058         else {
1059                 if(is_big_endian_host) {
1060                         byte tmp, *b = (byte*)val;
1061                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
1062                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
1063                 }
1064                 return true;
1065         }
1066 }
1067
1068 bool write_big_endian_uint16(FILE *f, uint16 val)
1069 {
1070         if(!is_big_endian_host) {
1071                 byte *b = (byte *)&val, tmp;
1072                 tmp = b[0]; b[0] = b[1]; b[1] = tmp;
1073         }
1074         return fwrite(&val, 1, 2, f) == 2;
1075 }
1076
1077 bool write_big_endian_uint64(FILE *f, uint64 val)
1078 {
1079         if(!is_big_endian_host) {
1080                 byte *b = (byte *)&val, tmp;
1081                 tmp = b[0]; b[0] = b[7]; b[7] = tmp;
1082                 tmp = b[1]; b[1] = b[6]; b[6] = tmp;
1083                 tmp = b[2]; b[2] = b[5]; b[3] = tmp;
1084                 tmp = b[3]; b[3] = b[4]; b[4] = tmp;
1085         }
1086         return fwrite(&val, 1, 8, f) == 8;
1087 }