fix some pipe bugs
[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 #define CHUNK_OF_SAMPLES 2048
35
36 typedef enum {
37         FLAC__VERIFY_OK,
38         FLAC__VERIFY_FAILED_IN_FRAME,
39         FLAC__VERIFY_FAILED_IN_METADATA
40 } verify_code;
41
42 typedef struct {
43         int32 *original[FLAC__MAX_CHANNELS];
44         unsigned size; /* of each original[] in samples */
45         unsigned tail; /* in wide samples */
46         const byte *encoded_signal;
47         unsigned encoded_bytes;
48         bool into_frames;
49         verify_code result;
50         FLAC__StreamDecoder *decoder;
51 } verify_fifo_struct;
52
53 typedef struct {
54         FILE *fout;
55         const char *outfile;
56         FLAC__Encoder *encoder;
57         bool verify;
58         bool verbose;
59         uint64 unencoded_size;
60         uint64 total_samples_to_encode;
61         uint64 bytes_written;
62         uint64 samples_written;
63         unsigned current_frame;
64         verify_fifo_struct verify_fifo;
65 } encoder_wrapper_struct;
66
67 static bool is_big_endian_host;
68
69 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*(FLAC__MAX_BITS_PER_SAMPLE>>3)];
70 static signed char *scbuffer = (signed char *)ucbuffer;
71 static uint16 *usbuffer = (uint16 *)ucbuffer;
72 static int16 *ssbuffer = (int16 *)ucbuffer;
73
74 static int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
75 static int32 *input[FLAC__MAX_CHANNELS];
76
77 /* local routines */
78 static bool init(encoder_wrapper_struct *encoder_wrapper);
79 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);
80 static void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper);
81 static FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
82 static void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
83 static FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data);
84 static FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__FrameHeader *header, const int32 *buffer[], void *client_data);
85 static void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
86 static void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
87 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
88 static bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok);
89 static bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok);
90
91 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)
92 {
93         encoder_wrapper_struct encoder_wrapper;
94         FILE *fin;
95         bool is_unsigned_samples;
96         unsigned channels, bps, sample_rate, data_bytes;
97         size_t bytes_per_wide_sample, bytes_read;
98         uint16 x;
99         uint32 xx;
100
101         encoder_wrapper.encoder = 0;
102         encoder_wrapper.verify = verify;
103         encoder_wrapper.verbose = verbose;
104         encoder_wrapper.bytes_written = 0;
105         encoder_wrapper.samples_written = 0;
106         encoder_wrapper.outfile = outfile;
107
108         if(0 == strcmp(infile, "-")) {
109                 fin = stdin;
110         }
111         else {
112                 if(0 == (fin = fopen(infile, "rb"))) {
113                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
114                         return false;
115                 }
116         }
117         if(0 == strcmp(outfile, "-")) {
118                 encoder_wrapper.fout = stdout;
119         }
120         else {
121                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
122                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
123                         fclose(fin);
124                         return false;
125                 }
126         }
127
128         if(!init(&encoder_wrapper))
129                 goto wav_abort_;
130
131         /*
132          * check the RIFF chunk
133          */
134         if(!read_little_endian_uint32(fin, &xx, false))
135                 goto wav_abort_;
136         if(xx != 0x46464952) { /* "RIFF" */
137                 fprintf(stderr, "ERROR: no RIFF header\n");
138                 goto wav_abort_;
139         }
140         if(!read_little_endian_uint32(fin, &xx, false))
141                 goto wav_abort_;
142
143         /*
144          * now process the WAVE chunk
145          */
146         if(!read_little_endian_uint32(fin, &xx, true))
147                 goto wav_end_;
148         if(xx != 0x45564157) { /* "WAVE" */
149                 fprintf(stderr, "ERROR: no WAVE header\n");
150                 goto wav_abort_;
151         }
152
153         /* do the format sub-chunk */
154         if(!read_little_endian_uint32(fin, &xx, false))
155                 goto wav_abort_;
156         if(xx != 0x20746d66) { /* "fmt " */
157                 fprintf(stderr, "ERROR: no format sub-chunk\n");
158                 goto wav_abort_;
159         }
160         /* fmt chunk size */
161         if(!read_little_endian_uint32(fin, &xx, false))
162                 goto wav_abort_;
163         if(xx != 16) {
164                 fprintf(stderr, "ERROR: unsupported chunk\n");
165                 goto wav_abort_;
166         }
167         /* compression code */
168         if(!read_little_endian_uint16(fin, &x, false))
169                 goto wav_abort_;
170         if(x != 1) {
171                 fprintf(stderr, "ERROR: unsupported compression type %u\n", (unsigned)x);
172                 goto wav_abort_;
173         }
174         /* number of channels */
175         if(!read_little_endian_uint16(fin, &x, false))
176                 goto wav_abort_;
177         if(x == 0 || x > FLAC__MAX_CHANNELS) {
178                 fprintf(stderr, "ERROR: unsupported number channels %u\n", (unsigned)x);
179                 goto wav_abort_;
180         }
181         channels = x;
182         /* sample rate */
183         if(!read_little_endian_uint32(fin, &xx, false))
184                 goto wav_abort_;
185         if(xx == 0 || xx > FLAC__MAX_SAMPLE_RATE) {
186                 fprintf(stderr, "ERROR: unsupported sample rate %u\n", (unsigned)xx);
187                 goto wav_abort_;
188         }
189         sample_rate = xx;
190         /* avg bytes per second (ignored) */
191         if(!read_little_endian_uint32(fin, &xx, false))
192                 goto wav_abort_;
193         /* block align (ignored) */
194         if(!read_little_endian_uint16(fin, &x, false))
195                 goto wav_abort_;
196         /* bits per sample */
197         if(!read_little_endian_uint16(fin, &x, false))
198                 goto wav_abort_;
199         if(x != 8 && x != 16) {
200                 fprintf(stderr, "ERROR: unsupported bits per sample %u\n", (unsigned)x);
201                 goto wav_abort_;
202         }
203         bps = x;
204         is_unsigned_samples = (x == 8);
205
206         /* do the data sub-chunk */
207         if(!read_little_endian_uint32(fin, &xx, false))
208                 goto wav_abort_;
209         if(xx != 0x61746164) { /* "data" */
210                 fprintf(stderr, "ERROR: no data sub-chunk\n");
211                 goto wav_abort_;
212         }
213         /* data size */
214         if(!read_little_endian_uint32(fin, &xx, false))
215                 goto wav_abort_;
216         data_bytes = xx;
217
218         bytes_per_wide_sample = channels * (bps >> 3);
219
220         if(skip > 0) {
221                 if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_CUR)) {
222                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
223                         goto wav_abort_;
224                 }
225         }
226
227         encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample - skip;
228         encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44; /* 44 for the size of the WAV headers */
229
230         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))
231                 goto wav_abort_;
232
233         encoder_wrapper.verify_fifo.into_frames = true;
234
235         while(data_bytes > 0) {
236                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
237                 if(bytes_read == 0) {
238                         if(ferror(fin)) {
239                                 fprintf(stderr, "ERROR reading from %s\n", infile);
240                                 goto wav_abort_;
241                         }
242                         else if(feof(fin))
243                                 break;
244                 }
245                 else {
246                         if(bytes_read > data_bytes)
247                                 bytes_read = data_bytes; /* chop off anything after the end of the data chunk */
248                         if(bytes_read % bytes_per_wide_sample != 0) {
249                                 fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
250                                 goto wav_abort_;
251                         }
252                         else {
253                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
254                                 format_input(wide_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
255                                 if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
256                                         fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
257                                         goto wav_abort_;
258                                 }
259                                 data_bytes -= bytes_read;
260                         }
261                 }
262         }
263
264 wav_end_:
265         if(encoder_wrapper.encoder) {
266                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
267                         FLAC__encoder_finish(encoder_wrapper.encoder);
268                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
269         }
270         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
271                 print_stats(&encoder_wrapper);
272                 printf("\n");
273         }
274         if(verify) {
275                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
276                         printf("Verify FAILED!  Do not use %s\n", outfile);
277                         return 1;
278                 }
279                 else {
280                         printf("Verify succeeded\n");
281                 }
282         }
283         fclose(fin);
284         return 0;
285 wav_abort_:
286         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
287                 printf("\n");
288         if(encoder_wrapper.encoder) {
289                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
290                         FLAC__encoder_finish(encoder_wrapper.encoder);
291                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
292         }
293         if(verify) {
294                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
295                         printf("Verify FAILED!  Do not use %s\n", outfile);
296                         return 1;
297                 }
298                 else {
299                         printf("Verify succeeded\n");
300                 }
301         }
302         fclose(fin);
303         unlink(outfile);
304         return 1;
305 }
306
307 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)
308 {
309         encoder_wrapper_struct encoder_wrapper;
310         FILE *fin;
311         size_t bytes_read;
312         const size_t bytes_per_wide_sample = channels * (bps >> 3);
313
314         encoder_wrapper.encoder = 0;
315         encoder_wrapper.verify = verify;
316         encoder_wrapper.verbose = verbose;
317         encoder_wrapper.bytes_written = 0;
318         encoder_wrapper.samples_written = 0;
319         encoder_wrapper.outfile = outfile;
320
321         if(0 == strcmp(infile, "-")) {
322                 fin = stdin;
323         }
324         else {
325                 if(0 == (fin = fopen(infile, "rb"))) {
326                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
327                         return false;
328                 }
329         }
330         if(0 == strcmp(outfile, "-")) {
331                 encoder_wrapper.fout = stdout;
332         }
333         else {
334                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
335                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
336                         fclose(fin);
337                         return false;
338                 }
339         }
340
341         if(!init(&encoder_wrapper))
342                 goto raw_abort_;
343
344         /* get the file length */
345         if(0 != fseek(fin, 0, SEEK_END)) {
346                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
347         }
348         else {
349                 long filesize;
350                 fflush(fin);
351                 if(-1 == (filesize = ftell(fin))) {
352                         encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
353                 }
354                 else {
355                         encoder_wrapper.unencoded_size = filesize - skip * bytes_per_wide_sample;
356                         encoder_wrapper.total_samples_to_encode = filesize / bytes_per_wide_sample - skip;
357                 }
358         }
359
360         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_SET)) {
361                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
362                 goto raw_abort_;
363         }
364
365         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))
366                 goto raw_abort_;
367
368         encoder_wrapper.verify_fifo.into_frames = true;
369
370         while(!feof(fin)) {
371                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
372                 if(bytes_read == 0) {
373                         if(ferror(fin)) {
374                                 fprintf(stderr, "ERROR reading from %s\n", infile);
375                                 goto raw_abort_;
376                         }
377                 }
378                 else if(bytes_read % bytes_per_wide_sample != 0) {
379                         fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
380                         goto raw_abort_;
381                 }
382                 else {
383                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
384                         format_input(wide_samples, is_big_endian, is_unsigned_samples, channels, bps, &encoder_wrapper);
385                         if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
386                                 fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
387                                 goto raw_abort_;
388                         }
389                 }
390         }
391
392         if(encoder_wrapper.encoder) {
393                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
394                         FLAC__encoder_finish(encoder_wrapper.encoder);
395                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
396         }
397         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
398                 print_stats(&encoder_wrapper);
399                 printf("\n");
400         }
401         if(verify) {
402                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
403                         printf("Verify FAILED!  Do not use %s\n", outfile);
404                         return 1;
405                 }
406                 else {
407                         printf("Verify succeeded\n");
408                 }
409         }
410         fclose(fin);
411         return 0;
412 raw_abort_:
413         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
414                 printf("\n");
415         if(encoder_wrapper.encoder) {
416                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
417                         FLAC__encoder_finish(encoder_wrapper.encoder);
418                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
419         }
420         if(verify) {
421                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
422                         printf("Verify FAILED!  Do not use %s\n", outfile);
423                         return 1;
424                 }
425                 else {
426                         printf("Verify succeeded\n");
427                 }
428         }
429         fclose(fin);
430         unlink(outfile);
431         return 1;
432 }
433
434 bool init(encoder_wrapper_struct *encoder_wrapper)
435 {
436         unsigned i;
437         uint32 test = 1;
438
439         is_big_endian_host = (*((byte*)(&test)))? false : true;
440
441         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
442                 input[i] = &(in[i][0]);
443
444         encoder_wrapper->encoder = FLAC__encoder_get_new_instance();
445         if(0 == encoder_wrapper->encoder) {
446                 fprintf(stderr, "ERROR creating the encoder instance\n");
447                 return false;
448         }
449
450         return true;
451 }
452
453 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)
454 {
455         if(channels != 2 || bps > 16)
456                 do_mid_side = false;
457
458         if(encoder_wrapper->verify) {
459                 unsigned i;
460
461                 /* set up the fifo which will hold the original signal to compare against */
462                 encoder_wrapper->verify_fifo.size = blocksize + CHUNK_OF_SAMPLES;
463                 for(i = 0; i < channels; i++) {
464                         if(0 == (encoder_wrapper->verify_fifo.original[i] = (int32*)malloc(sizeof(int32) * encoder_wrapper->verify_fifo.size))) {
465                                 fprintf(stderr, "ERROR allocating verify buffers\n");
466                                 return false;
467                         }
468                 }
469                 encoder_wrapper->verify_fifo.tail = 0;
470                 encoder_wrapper->verify_fifo.into_frames = false;
471                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_OK;
472
473                 /* set up a stream decoder for verification */
474                 encoder_wrapper->verify_fifo.decoder = FLAC__stream_decoder_get_new_instance();
475                 if(0 == encoder_wrapper->verify_fifo.decoder) {
476                         fprintf(stderr, "ERROR creating the verify decoder instance\n");
477                         return false;
478                 }
479                 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) {
480                         fprintf(stderr, "ERROR initializing decoder, state = %d:%s\n", encoder_wrapper->verify_fifo.decoder->state, FLAC__StreamDecoderStateString[encoder_wrapper->verify_fifo.decoder->state]);
481                         return false;
482                 }
483         }
484
485         encoder_wrapper->encoder->streamable_subset = !lax;
486         encoder_wrapper->encoder->channels = channels;
487         encoder_wrapper->encoder->bits_per_sample = bps;
488         encoder_wrapper->encoder->sample_rate = sample_rate;
489         encoder_wrapper->encoder->blocksize = blocksize;
490         encoder_wrapper->encoder->qlp_coeff_precision = qlp_coeff_precision;
491         encoder_wrapper->encoder->max_lpc_order = max_lpc_order;
492         encoder_wrapper->encoder->do_mid_side_stereo = do_mid_side;
493         encoder_wrapper->encoder->do_exhaustive_model_search = do_exhaustive_model_search;
494         encoder_wrapper->encoder->do_qlp_coeff_prec_search = do_qlp_coeff_prec_search;
495         encoder_wrapper->encoder->rice_optimization_level = rice_optimization_level;
496         encoder_wrapper->encoder->total_samples_estimate = encoder_wrapper->total_samples_to_encode;
497
498         if(FLAC__encoder_init(encoder_wrapper->encoder, write_callback, metadata_callback, encoder_wrapper) != FLAC__ENCODER_OK) {
499                 fprintf(stderr, "ERROR initializing encoder, state = %d\n", encoder_wrapper->encoder->state);
500                 return false;
501         }
502
503         return true;
504 }
505
506 void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper)
507 {
508         unsigned wide_sample, sample, channel, byte;
509
510         if(bps == 8) {
511                 if(is_unsigned_samples) {
512                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
513                                 for(channel = 0; channel < channels; channel++, sample++)
514                                         input[channel][wide_sample] = (int32)ucbuffer[sample] - 128;
515                 }
516                 else {
517                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
518                                 for(channel = 0; channel < channels; channel++, sample++)
519                                         input[channel][wide_sample] = (int32)scbuffer[sample];
520                 }
521         }
522         else {
523                 if(is_big_endian != is_big_endian_host) {
524                         unsigned char tmp;
525                         const unsigned bytes = wide_samples * channels * (bps >> 3);
526                         for(byte = 0; byte < bytes; byte += 2) {
527                                 tmp = ucbuffer[byte];
528                                 ucbuffer[byte] = ucbuffer[byte+1];
529                                 ucbuffer[byte+1] = tmp;
530                         }
531                 }
532                 if(is_unsigned_samples) {
533                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
534                                 for(channel = 0; channel < channels; channel++, sample++)
535                                         input[channel][wide_sample] = (int32)usbuffer[sample] - 32768;
536                 }
537                 else {
538                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
539                                 for(channel = 0; channel < channels; channel++, sample++)
540                                         input[channel][wide_sample] = (int32)ssbuffer[sample];
541                 }
542         }
543
544         if(encoder_wrapper->verify) {
545                 for(channel = 0; channel < channels; channel++)
546                         memcpy(&encoder_wrapper->verify_fifo.original[channel][encoder_wrapper->verify_fifo.tail], &input[channel][0], sizeof(int32) * wide_samples);
547                 encoder_wrapper->verify_fifo.tail += wide_samples;
548                 assert(encoder_wrapper->verify_fifo.tail <= encoder_wrapper->verify_fifo.size);
549         }
550 }
551
552 FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
553 {
554         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
555         unsigned mask = (encoder->do_exhaustive_model_search || encoder->do_qlp_coeff_prec_search)? 0x07 : 0x1f;
556
557         encoder_wrapper->bytes_written += bytes;
558         encoder_wrapper->samples_written += samples;
559         encoder_wrapper->current_frame = current_frame;
560
561         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
562                 print_stats(encoder_wrapper);
563
564         if(encoder_wrapper->verify) {
565                 encoder_wrapper->verify_fifo.encoded_signal = buffer;
566                 encoder_wrapper->verify_fifo.encoded_bytes = bytes;
567                 if(encoder_wrapper->verify_fifo.into_frames) {
568                         if(!FLAC__stream_decoder_process_one_frame(encoder_wrapper->verify_fifo.decoder)) {
569                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_FRAME;
570                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
571                         }
572                 }
573                 else {
574                         if(!FLAC__stream_decoder_process_metadata(encoder_wrapper->verify_fifo.decoder)) {
575                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_METADATA;
576                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
577                         }
578                 }
579         }
580
581         if(fwrite(buffer, sizeof(byte), bytes, encoder_wrapper->fout) == bytes)
582                 return FLAC__ENCODER_WRITE_OK;
583         else
584                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
585 }
586
587 void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data)
588 {
589         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
590         byte b;
591         FILE *f;
592         const uint64 samples = metadata->data.encoding.total_samples;
593         const unsigned min_framesize = metadata->data.encoding.min_framesize;
594         const unsigned max_framesize = metadata->data.encoding.max_framesize;
595
596         (void)encoder; /* silence compiler warning about unused parameter */
597
598         if(encoder_wrapper->fout == stdout)
599                 return;
600
601         fclose(encoder_wrapper->fout);
602         if(0 == (f = fopen(encoder_wrapper->outfile, "r+b")))
603                 return;
604
605         /* all this is based on intimate knowledge of the stream header
606          * layout, but a change to the header format that would break this
607          * would also break all streams encoded in the previous format.
608          */
609
610         if(-1 == fseek(f, 26, SEEK_SET)) goto samples_;
611         fwrite(metadata->data.encoding.md5sum, 1, 16, f);
612
613 samples_:
614         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
615         if(fread(&b, 1, 1, f) != 1) goto framesize_;
616         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
617         b = (b & 0xf0) | (byte)((samples >> 32) & 0x0F);
618         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
619         b = (byte)((samples >> 24) & 0xFF);
620         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
621         b = (byte)((samples >> 16) & 0xFF);
622         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
623         b = (byte)((samples >> 8) & 0xFF);
624         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
625         b = (byte)(samples & 0xFF);
626         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
627
628 framesize_:
629         if(-1 == fseek(f, 12, SEEK_SET)) goto end_;
630         b = (byte)((min_framesize >> 16) & 0xFF);
631         if(fwrite(&b, 1, 1, f) != 1) goto end_;
632         b = (byte)((min_framesize >> 8) & 0xFF);
633         if(fwrite(&b, 1, 1, f) != 1) goto end_;
634         b = (byte)(min_framesize & 0xFF);
635         if(fwrite(&b, 1, 1, f) != 1) goto end_;
636         b = (byte)((max_framesize >> 16) & 0xFF);
637         if(fwrite(&b, 1, 1, f) != 1) goto end_;
638         b = (byte)((max_framesize >> 8) & 0xFF);
639         if(fwrite(&b, 1, 1, f) != 1) goto end_;
640         b = (byte)(max_framesize & 0xFF);
641         if(fwrite(&b, 1, 1, f) != 1) goto end_;
642 end_:
643         fclose(encoder_wrapper->fout);
644         return;
645 }
646
647 FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data)
648 {
649         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
650         (void)decoder;
651
652         *bytes = encoder_wrapper->verify_fifo.encoded_bytes;
653         memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
654
655         return FLAC__STREAM_DECODER_READ_CONTINUE;
656 }
657
658 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__FrameHeader *header, const int32 *buffer[], void *client_data)
659 {
660         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
661         unsigned channel, l, r;
662
663         for(channel = 0; channel < decoder->channels; channel++) {
664                 if(0 != memcmp(buffer[channel], encoder_wrapper->verify_fifo.original[channel], sizeof(int32) * decoder->blocksize)) {
665                         fprintf(stderr, "\nERROR: mismatch in decoded data, verify FAILED!\n");
666                         fprintf(stderr, "       Please submit a bug report to http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
667                         return FLAC__STREAM_DECODER_WRITE_ABORT;
668                 }
669         }
670         /* dequeue the frame from the fifo */
671         for(channel = 0; channel < decoder->channels; channel++) {
672                 for(l = 0, r = header->blocksize; r < encoder_wrapper->verify_fifo.tail; l++, r++) {
673                         encoder_wrapper->verify_fifo.original[channel][l] = encoder_wrapper->verify_fifo.original[channel][r];
674                 }
675         }
676         encoder_wrapper->verify_fifo.tail -= header->blocksize;
677         return FLAC__STREAM_DECODER_WRITE_CONTINUE;
678 }
679
680 void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
681 {
682         (void)decoder;
683         (void)metadata;
684         (void)client_data;
685 }
686
687 void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
688 {
689         (void)decoder;
690         (void)client_data;
691         fprintf(stderr, "\nERROR: verification decoder returned error %d:%s\n", status, FLAC__StreamDecoderErrorStatusString[status]);
692 }
693
694 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
695 {
696 #ifdef _MSC_VER
697         /* with VC++ you have to spoon feed it the casting */
698         double progress = (double)(int64)encoder_wrapper->samples_written / (double)(int64)encoder_wrapper->total_samples_to_encode;
699 #else
700         double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
701 #endif
702         printf("\r%0.2f%% complete: frame %u, wrote %u bytes, %u of %u samples, ratio = %5.3f",
703                 progress * 100.0, encoder_wrapper->current_frame,
704                 (unsigned)encoder_wrapper->bytes_written, (unsigned)encoder_wrapper->samples_written, (unsigned)encoder_wrapper->total_samples_to_encode,
705 #ifdef _MSC_VER
706                 /* with VC++ you have to spoon feed it the casting */
707                 (double)(int64)encoder_wrapper->bytes_written / ((double)(int64)encoder_wrapper->unencoded_size * progress)
708 #else
709                 (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress)
710 #endif
711         );
712         fflush(stdout);
713 }
714
715 bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok)
716 {
717         size_t bytes_read = fread(val, 1, 2, f);
718
719         if(bytes_read == 0) {
720                 if(!eof_ok) {
721                         fprintf(stderr, "ERROR: unexpected EOF\n");
722                         return false;
723                 }
724                 else
725                         return true;
726         }
727         else if(bytes_read < 2) {
728                 fprintf(stderr, "ERROR: unexpected EOF\n");
729                 return false;
730         }
731         else {
732                 if(is_big_endian_host) {
733                         byte tmp, *b = (byte*)val;
734                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
735                 }
736                 return true;
737         }
738 }
739
740 bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok)
741 {
742         size_t bytes_read = fread(val, 1, 4, f);
743
744         if(bytes_read == 0) {
745                 if(!eof_ok) {
746                         fprintf(stderr, "ERROR: unexpected EOF\n");
747                         return false;
748                 }
749                 else
750                         return true;
751         }
752         else if(bytes_read < 4) {
753                 fprintf(stderr, "ERROR: unexpected EOF\n");
754                 return false;
755         }
756         else {
757                 if(is_big_endian_host) {
758                         byte tmp, *b = (byte*)val;
759                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
760                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
761                 }
762                 return true;
763         }
764 }