revamp in anticipation of new analysis mode
[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 typedef struct {
48         int32 *original[FLAC__MAX_CHANNELS];
49         unsigned size; /* of each original[] in samples */
50         unsigned tail; /* in wide samples */
51         const byte *encoded_signal;
52         unsigned encoded_bytes;
53         bool into_frames;
54         verify_code result;
55         FLAC__StreamDecoder *decoder;
56 } verify_fifo_struct;
57
58 typedef struct {
59         FILE *fout;
60         const char *outfile;
61         FLAC__Encoder *encoder;
62         bool verify;
63         bool verbose;
64         uint64 unencoded_size;
65         uint64 total_samples_to_encode;
66         uint64 bytes_written;
67         uint64 samples_written;
68         unsigned current_frame;
69         verify_fifo_struct verify_fifo;
70 } encoder_wrapper_struct;
71
72 static bool is_big_endian_host;
73
74 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*(FLAC__MAX_BITS_PER_SAMPLE>>3)];
75 static signed char *scbuffer = (signed char *)ucbuffer;
76 static uint16 *usbuffer = (uint16 *)ucbuffer;
77 static int16 *ssbuffer = (int16 *)ucbuffer;
78
79 static int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
80 static int32 *input[FLAC__MAX_CHANNELS];
81
82 /* local routines */
83 static bool init(encoder_wrapper_struct *encoder_wrapper);
84 static bool init_encoder(bool lax, bool do_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, encoder_wrapper_struct *encoder_wrapper);
85 static void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper);
86 static FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
87 static void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
88 static FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data);
89 static FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data);
90 static void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
91 static void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
92 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
93 static bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok);
94 static bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok);
95
96 int encode_wav(const char *infile, const char *outfile, bool verbose, uint64 skip, bool verify, bool lax, bool do_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)
97 {
98         encoder_wrapper_struct encoder_wrapper;
99         FILE *fin;
100         bool is_unsigned_samples;
101         unsigned channels, bps, sample_rate, data_bytes;
102         size_t bytes_per_wide_sample, bytes_read;
103         uint16 x;
104         uint32 xx;
105
106         encoder_wrapper.encoder = 0;
107         encoder_wrapper.verify = verify;
108         encoder_wrapper.verbose = verbose;
109         encoder_wrapper.bytes_written = 0;
110         encoder_wrapper.samples_written = 0;
111         encoder_wrapper.outfile = outfile;
112
113         if(0 == strcmp(infile, "-")) {
114                 fin = stdin;
115         }
116         else {
117                 if(0 == (fin = fopen(infile, "rb"))) {
118                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
119                         return false;
120                 }
121         }
122         if(0 == strcmp(outfile, "-")) {
123                 encoder_wrapper.fout = stdout;
124         }
125         else {
126                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
127                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
128                         fclose(fin);
129                         return false;
130                 }
131         }
132
133         if(!init(&encoder_wrapper))
134                 goto wav_abort_;
135
136         /*
137          * check the RIFF chunk
138          */
139         if(!read_little_endian_uint32(fin, &xx, false))
140                 goto wav_abort_;
141         if(xx != 0x46464952) { /* "RIFF" */
142                 fprintf(stderr, "ERROR: no RIFF header\n");
143                 goto wav_abort_;
144         }
145         if(!read_little_endian_uint32(fin, &xx, false))
146                 goto wav_abort_;
147
148         /*
149          * now process the WAVE chunk
150          */
151         if(!read_little_endian_uint32(fin, &xx, true))
152                 goto wav_end_;
153         if(xx != 0x45564157) { /* "WAVE" */
154                 fprintf(stderr, "ERROR: no WAVE header\n");
155                 goto wav_abort_;
156         }
157
158         /* do the format sub-chunk */
159         if(!read_little_endian_uint32(fin, &xx, false))
160                 goto wav_abort_;
161         if(xx != 0x20746d66) { /* "fmt " */
162                 fprintf(stderr, "ERROR: no format sub-chunk\n");
163                 goto wav_abort_;
164         }
165         /* fmt chunk size */
166         if(!read_little_endian_uint32(fin, &xx, false))
167                 goto wav_abort_;
168         if(xx != 16) {
169                 fprintf(stderr, "ERROR: unsupported chunk\n");
170                 goto wav_abort_;
171         }
172         /* compression code */
173         if(!read_little_endian_uint16(fin, &x, false))
174                 goto wav_abort_;
175         if(x != 1) {
176                 fprintf(stderr, "ERROR: unsupported compression type %u\n", (unsigned)x);
177                 goto wav_abort_;
178         }
179         /* number of channels */
180         if(!read_little_endian_uint16(fin, &x, false))
181                 goto wav_abort_;
182         if(x == 0 || x > FLAC__MAX_CHANNELS) {
183                 fprintf(stderr, "ERROR: unsupported number channels %u\n", (unsigned)x);
184                 goto wav_abort_;
185         }
186         channels = x;
187         /* sample rate */
188         if(!read_little_endian_uint32(fin, &xx, false))
189                 goto wav_abort_;
190         if(xx == 0 || xx > FLAC__MAX_SAMPLE_RATE) {
191                 fprintf(stderr, "ERROR: unsupported sample rate %u\n", (unsigned)xx);
192                 goto wav_abort_;
193         }
194         sample_rate = xx;
195         /* avg bytes per second (ignored) */
196         if(!read_little_endian_uint32(fin, &xx, false))
197                 goto wav_abort_;
198         /* block align (ignored) */
199         if(!read_little_endian_uint16(fin, &x, false))
200                 goto wav_abort_;
201         /* bits per sample */
202         if(!read_little_endian_uint16(fin, &x, false))
203                 goto wav_abort_;
204         if(x != 8 && x != 16) {
205                 fprintf(stderr, "ERROR: unsupported bits per sample %u\n", (unsigned)x);
206                 goto wav_abort_;
207         }
208         bps = x;
209         is_unsigned_samples = (x == 8);
210
211         /* do the data sub-chunk */
212         if(!read_little_endian_uint32(fin, &xx, false))
213                 goto wav_abort_;
214         if(xx != 0x61746164) { /* "data" */
215                 fprintf(stderr, "ERROR: no data sub-chunk\n");
216                 goto wav_abort_;
217         }
218         /* data size */
219         if(!read_little_endian_uint32(fin, &xx, false))
220                 goto wav_abort_;
221         data_bytes = xx;
222
223         bytes_per_wide_sample = channels * (bps >> 3);
224
225         if(skip > 0) {
226                 if(fin != stdin) {
227                         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_CUR)) {
228                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
229                                 goto wav_abort_;
230                         }
231                 }
232                 else {
233                         int64 left;
234                         unsigned need;
235                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
236                                 need = min(left, CHUNK_OF_SAMPLES);
237                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, fin) < need) {
238                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
239                                         goto wav_abort_;
240                                 }
241                         }
242                 }
243         }
244
245         encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample - skip;
246         encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44; /* 44 for the size of the WAV headers */
247
248         if(!init_encoder(lax, do_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, &encoder_wrapper))
249                 goto wav_abort_;
250
251         encoder_wrapper.verify_fifo.into_frames = true;
252
253         while(data_bytes > 0) {
254                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
255                 if(bytes_read == 0) {
256                         if(ferror(fin)) {
257                                 fprintf(stderr, "ERROR reading from %s\n", infile);
258                                 goto wav_abort_;
259                         }
260                         else if(feof(fin))
261                                 break;
262                 }
263                 else {
264                         if(bytes_read > data_bytes)
265                                 bytes_read = data_bytes; /* chop off anything after the end of the data chunk */
266                         if(bytes_read % bytes_per_wide_sample != 0) {
267                                 fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
268                                 goto wav_abort_;
269                         }
270                         else {
271                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
272                                 format_input(wide_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
273                                 if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
274                                         fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
275                                         goto wav_abort_;
276                                 }
277                                 data_bytes -= bytes_read;
278                         }
279                 }
280         }
281
282 wav_end_:
283         if(encoder_wrapper.encoder) {
284                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
285                         FLAC__encoder_finish(encoder_wrapper.encoder);
286                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
287         }
288         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
289                 print_stats(&encoder_wrapper);
290                 printf("\n");
291         }
292         if(verify) {
293                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
294                         printf("Verify FAILED!  Do not use %s\n", outfile);
295                         return 1;
296                 }
297                 else {
298                         printf("Verify succeeded\n");
299                 }
300         }
301         fclose(fin);
302         return 0;
303 wav_abort_:
304         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
305                 printf("\n");
306         if(encoder_wrapper.encoder) {
307                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
308                         FLAC__encoder_finish(encoder_wrapper.encoder);
309                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
310         }
311         if(verify) {
312                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
313                         printf("Verify FAILED!  Do not use %s\n", outfile);
314                         return 1;
315                 }
316                 else {
317                         printf("Verify succeeded\n");
318                 }
319         }
320         fclose(fin);
321         unlink(outfile);
322         return 1;
323 }
324
325 int encode_raw(const char *infile, const char *outfile, bool verbose, uint64 skip, bool verify, bool lax, bool do_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, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, unsigned sample_rate)
326 {
327         encoder_wrapper_struct encoder_wrapper;
328         FILE *fin;
329         size_t bytes_read;
330         const size_t bytes_per_wide_sample = channels * (bps >> 3);
331
332         encoder_wrapper.encoder = 0;
333         encoder_wrapper.verify = verify;
334         encoder_wrapper.verbose = verbose;
335         encoder_wrapper.bytes_written = 0;
336         encoder_wrapper.samples_written = 0;
337         encoder_wrapper.outfile = outfile;
338
339         if(0 == strcmp(infile, "-")) {
340                 fin = stdin;
341         }
342         else {
343                 if(0 == (fin = fopen(infile, "rb"))) {
344                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
345                         return false;
346                 }
347         }
348         if(0 == strcmp(outfile, "-")) {
349                 encoder_wrapper.fout = stdout;
350         }
351         else {
352                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
353                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
354                         fclose(fin);
355                         return false;
356                 }
357         }
358
359         if(!init(&encoder_wrapper))
360                 goto raw_abort_;
361
362         /* get the file length */
363         if(0 != fseek(fin, 0, SEEK_END)) {
364                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
365         }
366         else {
367                 long filesize;
368                 fflush(fin);
369                 if(-1 == (filesize = ftell(fin))) {
370                         encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
371                 }
372                 else {
373                         encoder_wrapper.unencoded_size = filesize - skip * bytes_per_wide_sample;
374                         encoder_wrapper.total_samples_to_encode = filesize / bytes_per_wide_sample - skip;
375                 }
376         }
377
378         if(skip > 0) {
379                 if(fin != stdin) {
380                         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_SET)) {
381                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
382                                 goto raw_abort_;
383                         }
384                 }
385                 else {
386                         int64 left;
387                         unsigned need;
388                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
389                                 need = min(left, CHUNK_OF_SAMPLES);
390                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, fin) < need) {
391                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
392                                         goto raw_abort_;
393                                 }
394                         }
395                 }
396         }
397
398         if(!init_encoder(lax, do_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, &encoder_wrapper))
399                 goto raw_abort_;
400
401         encoder_wrapper.verify_fifo.into_frames = true;
402
403         while(!feof(fin)) {
404                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
405                 if(bytes_read == 0) {
406                         if(ferror(fin)) {
407                                 fprintf(stderr, "ERROR reading from %s\n", infile);
408                                 goto raw_abort_;
409                         }
410                 }
411                 else if(bytes_read % bytes_per_wide_sample != 0) {
412                         fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
413                         goto raw_abort_;
414                 }
415                 else {
416                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
417                         format_input(wide_samples, is_big_endian, is_unsigned_samples, channels, bps, &encoder_wrapper);
418                         if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
419                                 fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
420                                 goto raw_abort_;
421                         }
422                 }
423         }
424
425         if(encoder_wrapper.encoder) {
426                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
427                         FLAC__encoder_finish(encoder_wrapper.encoder);
428                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
429         }
430         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
431                 print_stats(&encoder_wrapper);
432                 printf("\n");
433         }
434         if(verify) {
435                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
436                         printf("Verify FAILED!  Do not use %s\n", outfile);
437                         return 1;
438                 }
439                 else {
440                         printf("Verify succeeded\n");
441                 }
442         }
443         fclose(fin);
444         return 0;
445 raw_abort_:
446         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
447                 printf("\n");
448         if(encoder_wrapper.encoder) {
449                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
450                         FLAC__encoder_finish(encoder_wrapper.encoder);
451                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
452         }
453         if(verify) {
454                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
455                         printf("Verify FAILED!  Do not use %s\n", outfile);
456                         return 1;
457                 }
458                 else {
459                         printf("Verify succeeded\n");
460                 }
461         }
462         fclose(fin);
463         unlink(outfile);
464         return 1;
465 }
466
467 bool init(encoder_wrapper_struct *encoder_wrapper)
468 {
469         unsigned i;
470         uint32 test = 1;
471
472         is_big_endian_host = (*((byte*)(&test)))? false : true;
473
474         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
475                 input[i] = &(in[i][0]);
476
477         encoder_wrapper->encoder = FLAC__encoder_get_new_instance();
478         if(0 == encoder_wrapper->encoder) {
479                 fprintf(stderr, "ERROR creating the encoder instance\n");
480                 return false;
481         }
482
483         return true;
484 }
485
486 bool init_encoder(bool lax, bool do_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, encoder_wrapper_struct *encoder_wrapper)
487 {
488         if(channels != 2 || bps > 16)
489                 do_mid_side = false;
490
491         if(encoder_wrapper->verify) {
492                 unsigned i;
493
494                 /* set up the fifo which will hold the original signal to compare against */
495                 encoder_wrapper->verify_fifo.size = blocksize + CHUNK_OF_SAMPLES;
496                 for(i = 0; i < channels; i++) {
497                         if(0 == (encoder_wrapper->verify_fifo.original[i] = (int32*)malloc(sizeof(int32) * encoder_wrapper->verify_fifo.size))) {
498                                 fprintf(stderr, "ERROR allocating verify buffers\n");
499                                 return false;
500                         }
501                 }
502                 encoder_wrapper->verify_fifo.tail = 0;
503                 encoder_wrapper->verify_fifo.into_frames = false;
504                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_OK;
505
506                 /* set up a stream decoder for verification */
507                 encoder_wrapper->verify_fifo.decoder = FLAC__stream_decoder_get_new_instance();
508                 if(0 == encoder_wrapper->verify_fifo.decoder) {
509                         fprintf(stderr, "ERROR creating the verify decoder instance\n");
510                         return false;
511                 }
512                 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) {
513                         fprintf(stderr, "ERROR initializing decoder, state = %d:%s\n", encoder_wrapper->verify_fifo.decoder->state, FLAC__StreamDecoderStateString[encoder_wrapper->verify_fifo.decoder->state]);
514                         return false;
515                 }
516         }
517
518         encoder_wrapper->encoder->streamable_subset = !lax;
519         encoder_wrapper->encoder->channels = channels;
520         encoder_wrapper->encoder->bits_per_sample = bps;
521         encoder_wrapper->encoder->sample_rate = sample_rate;
522         encoder_wrapper->encoder->blocksize = blocksize;
523         encoder_wrapper->encoder->qlp_coeff_precision = qlp_coeff_precision;
524         encoder_wrapper->encoder->max_lpc_order = max_lpc_order;
525         encoder_wrapper->encoder->do_mid_side_stereo = do_mid_side;
526         encoder_wrapper->encoder->do_exhaustive_model_search = do_exhaustive_model_search;
527         encoder_wrapper->encoder->do_qlp_coeff_prec_search = do_qlp_coeff_prec_search;
528         encoder_wrapper->encoder->rice_optimization_level = rice_optimization_level;
529         encoder_wrapper->encoder->total_samples_estimate = encoder_wrapper->total_samples_to_encode;
530
531         if(FLAC__encoder_init(encoder_wrapper->encoder, write_callback, metadata_callback, encoder_wrapper) != FLAC__ENCODER_OK) {
532                 fprintf(stderr, "ERROR initializing encoder, state = %d\n", encoder_wrapper->encoder->state);
533                 return false;
534         }
535
536         return true;
537 }
538
539 void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper)
540 {
541         unsigned wide_sample, sample, channel, byte;
542
543         if(bps == 8) {
544                 if(is_unsigned_samples) {
545                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
546                                 for(channel = 0; channel < channels; channel++, sample++)
547                                         input[channel][wide_sample] = (int32)ucbuffer[sample] - 128;
548                 }
549                 else {
550                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
551                                 for(channel = 0; channel < channels; channel++, sample++)
552                                         input[channel][wide_sample] = (int32)scbuffer[sample];
553                 }
554         }
555         else {
556                 if(is_big_endian != is_big_endian_host) {
557                         unsigned char tmp;
558                         const unsigned bytes = wide_samples * channels * (bps >> 3);
559                         for(byte = 0; byte < bytes; byte += 2) {
560                                 tmp = ucbuffer[byte];
561                                 ucbuffer[byte] = ucbuffer[byte+1];
562                                 ucbuffer[byte+1] = tmp;
563                         }
564                 }
565                 if(is_unsigned_samples) {
566                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
567                                 for(channel = 0; channel < channels; channel++, sample++)
568                                         input[channel][wide_sample] = (int32)usbuffer[sample] - 32768;
569                 }
570                 else {
571                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
572                                 for(channel = 0; channel < channels; channel++, sample++)
573                                         input[channel][wide_sample] = (int32)ssbuffer[sample];
574                 }
575         }
576
577         if(encoder_wrapper->verify) {
578                 for(channel = 0; channel < channels; channel++)
579                         memcpy(&encoder_wrapper->verify_fifo.original[channel][encoder_wrapper->verify_fifo.tail], &input[channel][0], sizeof(int32) * wide_samples);
580                 encoder_wrapper->verify_fifo.tail += wide_samples;
581                 assert(encoder_wrapper->verify_fifo.tail <= encoder_wrapper->verify_fifo.size);
582         }
583 }
584
585 FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
586 {
587         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
588         unsigned mask = (encoder->do_exhaustive_model_search || encoder->do_qlp_coeff_prec_search)? 0x07 : 0x1f;
589
590         encoder_wrapper->bytes_written += bytes;
591         encoder_wrapper->samples_written += samples;
592         encoder_wrapper->current_frame = current_frame;
593
594         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
595                 print_stats(encoder_wrapper);
596
597         if(encoder_wrapper->verify) {
598                 encoder_wrapper->verify_fifo.encoded_signal = buffer;
599                 encoder_wrapper->verify_fifo.encoded_bytes = bytes;
600                 if(encoder_wrapper->verify_fifo.into_frames) {
601                         if(!FLAC__stream_decoder_process_one_frame(encoder_wrapper->verify_fifo.decoder)) {
602                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_FRAME;
603                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
604                         }
605                 }
606                 else {
607                         if(!FLAC__stream_decoder_process_metadata(encoder_wrapper->verify_fifo.decoder)) {
608                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_METADATA;
609                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
610                         }
611                 }
612         }
613
614         if(fwrite(buffer, sizeof(byte), bytes, encoder_wrapper->fout) == bytes)
615                 return FLAC__ENCODER_WRITE_OK;
616         else
617                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
618 }
619
620 void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data)
621 {
622         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
623         byte b;
624         FILE *f;
625         const uint64 samples = metadata->data.encoding.total_samples;
626         const unsigned min_framesize = metadata->data.encoding.min_framesize;
627         const unsigned max_framesize = metadata->data.encoding.max_framesize;
628
629         (void)encoder; /* silence compiler warning about unused parameter */
630
631         if(encoder_wrapper->fout == stdout)
632                 return;
633
634         fclose(encoder_wrapper->fout);
635         if(0 == (f = fopen(encoder_wrapper->outfile, "r+b")))
636                 return;
637
638         /* all this is based on intimate knowledge of the stream header
639          * layout, but a change to the header format that would break this
640          * would also break all streams encoded in the previous format.
641          */
642
643         if(-1 == fseek(f, 26, SEEK_SET)) goto samples_;
644         fwrite(metadata->data.encoding.md5sum, 1, 16, f);
645
646 samples_:
647         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
648         if(fread(&b, 1, 1, f) != 1) goto framesize_;
649         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
650         b = (b & 0xf0) | (byte)((samples >> 32) & 0x0F);
651         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
652         b = (byte)((samples >> 24) & 0xFF);
653         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
654         b = (byte)((samples >> 16) & 0xFF);
655         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
656         b = (byte)((samples >> 8) & 0xFF);
657         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
658         b = (byte)(samples & 0xFF);
659         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
660
661 framesize_:
662         if(-1 == fseek(f, 12, SEEK_SET)) goto end_;
663         b = (byte)((min_framesize >> 16) & 0xFF);
664         if(fwrite(&b, 1, 1, f) != 1) goto end_;
665         b = (byte)((min_framesize >> 8) & 0xFF);
666         if(fwrite(&b, 1, 1, f) != 1) goto end_;
667         b = (byte)(min_framesize & 0xFF);
668         if(fwrite(&b, 1, 1, f) != 1) goto end_;
669         b = (byte)((max_framesize >> 16) & 0xFF);
670         if(fwrite(&b, 1, 1, f) != 1) goto end_;
671         b = (byte)((max_framesize >> 8) & 0xFF);
672         if(fwrite(&b, 1, 1, f) != 1) goto end_;
673         b = (byte)(max_framesize & 0xFF);
674         if(fwrite(&b, 1, 1, f) != 1) goto end_;
675 end_:
676         fclose(encoder_wrapper->fout);
677         return;
678 }
679
680 FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data)
681 {
682         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
683         (void)decoder;
684
685         *bytes = encoder_wrapper->verify_fifo.encoded_bytes;
686         memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
687
688         return FLAC__STREAM_DECODER_READ_CONTINUE;
689 }
690
691 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data)
692 {
693         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
694         unsigned channel, l, r;
695
696         for(channel = 0; channel < decoder->channels; channel++) {
697                 if(0 != memcmp(buffer[channel], encoder_wrapper->verify_fifo.original[channel], sizeof(int32) * decoder->blocksize)) {
698                         fprintf(stderr, "\nERROR: mismatch in decoded data, verify FAILED!\n");
699                         fprintf(stderr, "       Please submit a bug report to http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
700                         return FLAC__STREAM_DECODER_WRITE_ABORT;
701                 }
702         }
703         /* dequeue the frame from the fifo */
704         for(channel = 0; channel < decoder->channels; channel++) {
705                 for(l = 0, r = frame->header.blocksize; r < encoder_wrapper->verify_fifo.tail; l++, r++) {
706                         encoder_wrapper->verify_fifo.original[channel][l] = encoder_wrapper->verify_fifo.original[channel][r];
707                 }
708         }
709         encoder_wrapper->verify_fifo.tail -= frame->header.blocksize;
710         return FLAC__STREAM_DECODER_WRITE_CONTINUE;
711 }
712
713 void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
714 {
715         (void)decoder;
716         (void)metadata;
717         (void)client_data;
718 }
719
720 void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
721 {
722         (void)decoder;
723         (void)client_data;
724         fprintf(stderr, "\nERROR: verification decoder returned error %d:%s\n", status, FLAC__StreamDecoderErrorStatusString[status]);
725 }
726
727 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
728 {
729 #ifdef _MSC_VER
730         /* with VC++ you have to spoon feed it the casting */
731         double progress = (double)(int64)encoder_wrapper->samples_written / (double)(int64)encoder_wrapper->total_samples_to_encode;
732 #else
733         double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
734 #endif
735         printf("\r%0.2f%% complete: frame %u, wrote %u bytes, %u of %u samples, ratio = %5.3f",
736                 progress * 100.0, encoder_wrapper->current_frame,
737                 (unsigned)encoder_wrapper->bytes_written, (unsigned)encoder_wrapper->samples_written, (unsigned)encoder_wrapper->total_samples_to_encode,
738 #ifdef _MSC_VER
739                 /* with VC++ you have to spoon feed it the casting */
740                 (double)(int64)encoder_wrapper->bytes_written / ((double)(int64)encoder_wrapper->unencoded_size * progress)
741 #else
742                 (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress)
743 #endif
744         );
745         fflush(stdout);
746 }
747
748 bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok)
749 {
750         size_t bytes_read = fread(val, 1, 2, f);
751
752         if(bytes_read == 0) {
753                 if(!eof_ok) {
754                         fprintf(stderr, "ERROR: unexpected EOF\n");
755                         return false;
756                 }
757                 else
758                         return true;
759         }
760         else if(bytes_read < 2) {
761                 fprintf(stderr, "ERROR: unexpected EOF\n");
762                 return false;
763         }
764         else {
765                 if(is_big_endian_host) {
766                         byte tmp, *b = (byte*)val;
767                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
768                 }
769                 return true;
770         }
771 }
772
773 bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok)
774 {
775         size_t bytes_read = fread(val, 1, 4, f);
776
777         if(bytes_read == 0) {
778                 if(!eof_ok) {
779                         fprintf(stderr, "ERROR: unexpected EOF\n");
780                         return false;
781                 }
782                 else
783                         return true;
784         }
785         else if(bytes_read < 4) {
786                 fprintf(stderr, "ERROR: unexpected EOF\n");
787                 return false;
788         }
789         else {
790                 if(is_big_endian_host) {
791                         byte tmp, *b = (byte*)val;
792                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
793                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
794                 }
795                 return true;
796         }
797 }