FFmpeg
wavenc.c
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1 /*
2  * WAV muxer
3  * Copyright (c) 2001, 2002 Fabrice Bellard
4  *
5  * Sony Wave64 muxer
6  * Copyright (c) 2012 Paul B Mahol
7  *
8  * WAV muxer RF64 support
9  * Copyright (c) 2013 Daniel Verkamp <daniel@drv.nu>
10  *
11  * EBU Tech 3285 - Supplement 3 - Peak Envelope Chunk encoder
12  * Copyright (c) 2014 Georg Lippitsch <georg.lippitsch@gmx.at>
13  *
14  * This file is part of FFmpeg.
15  *
16  * FFmpeg is free software; you can redistribute it and/or
17  * modify it under the terms of the GNU Lesser General Public
18  * License as published by the Free Software Foundation; either
19  * version 2.1 of the License, or (at your option) any later version.
20  *
21  * FFmpeg is distributed in the hope that it will be useful,
22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24  * Lesser General Public License for more details.
25  *
26  * You should have received a copy of the GNU Lesser General Public
27  * License along with FFmpeg; if not, write to the Free Software
28  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
29  */
30 
31 #include <stdint.h>
32 #include <string.h>
33 
34 #include "libavutil/avstring.h"
35 #include "libavutil/dict.h"
36 #include "libavutil/common.h"
37 #include "libavutil/intreadwrite.h"
38 #include "libavutil/mathematics.h"
39 #include "libavutil/opt.h"
40 #include "libavutil/time.h"
42 
43 #include "avformat.h"
44 #include "avio.h"
45 #include "avio_internal.h"
46 #include "internal.h"
47 #include "riff.h"
48 
49 #define RF64_AUTO (-1)
50 #define RF64_NEVER 0
51 #define RF64_ALWAYS 1
52 
53 #define PEAK_BUFFER_SIZE 1024
54 
55 typedef enum {
56  PEAK_OFF = 0,
59 } PeakType;
60 
61 typedef enum {
64 } PeakFormat;
65 
66 typedef struct WAVMuxContext {
67  const AVClass *class;
68  int64_t data;
69  int64_t fact_pos;
70  int64_t ds64;
71  int64_t minpts;
72  int64_t maxpts;
74  uint32_t peak_num_frames;
75  uint32_t peak_outbuf_size;
81  int rf64;
85  int peak_ppv;
86  int peak_bps;
88 
89 #if CONFIG_WAV_MUXER
90 static inline void bwf_write_bext_string(AVFormatContext *s, const char *key, int maxlen)
91 {
93  size_t len = 0;
94 
95  if (tag = av_dict_get(s->metadata, key, NULL, 0)) {
96  len = strlen(tag->value);
97  len = FFMIN(len, maxlen);
98  avio_write(s->pb, tag->value, len);
99  }
100 
101  ffio_fill(s->pb, 0, maxlen - len);
102 }
103 
104 static void bwf_write_bext_chunk(AVFormatContext *s)
105 {
106  AVDictionaryEntry *tmp_tag;
107  uint64_t time_reference = 0;
108  int64_t bext = ff_start_tag(s->pb, "bext");
109 
110  bwf_write_bext_string(s, "description", 256);
111  bwf_write_bext_string(s, "originator", 32);
112  bwf_write_bext_string(s, "originator_reference", 32);
113  bwf_write_bext_string(s, "origination_date", 10);
114  bwf_write_bext_string(s, "origination_time", 8);
115 
116  if (tmp_tag = av_dict_get(s->metadata, "time_reference", NULL, 0))
117  time_reference = strtoll(tmp_tag->value, NULL, 10);
118  avio_wl64(s->pb, time_reference);
119  avio_wl16(s->pb, 1); // set version to 1
120 
121  if ((tmp_tag = av_dict_get(s->metadata, "umid", NULL, 0)) && strlen(tmp_tag->value) > 2) {
122  unsigned char umidpart_str[17] = {0};
123  int64_t i;
124  uint64_t umidpart;
125  size_t len = strlen(tmp_tag->value+2);
126 
127  for (i = 0; i < len/16; i++) {
128  memcpy(umidpart_str, tmp_tag->value + 2 + (i*16), 16);
129  umidpart = strtoll(umidpart_str, NULL, 16);
130  avio_wb64(s->pb, umidpart);
131  }
132  ffio_fill(s->pb, 0, 64 - i*8);
133  } else
134  ffio_fill(s->pb, 0, 64); // zero UMID
135 
136  ffio_fill(s->pb, 0, 190); // Reserved
137 
138  if (tmp_tag = av_dict_get(s->metadata, "coding_history", NULL, 0))
139  avio_put_str(s->pb, tmp_tag->value);
140 
141  ff_end_tag(s->pb, bext);
142 }
143 
144 static av_cold void peak_free_buffers(AVFormatContext *s)
145 {
146  WAVMuxContext *wav = s->priv_data;
147 
148  av_freep(&wav->peak_maxpos);
149  av_freep(&wav->peak_maxneg);
150  av_freep(&wav->peak_output);
151 }
152 
153 static av_cold int peak_init_writer(AVFormatContext *s)
154 {
155  WAVMuxContext *wav = s->priv_data;
156  AVCodecParameters *par = s->streams[0]->codecpar;
157 
158  if (par->codec_id != AV_CODEC_ID_PCM_S8 &&
160  par->codec_id != AV_CODEC_ID_PCM_U8 &&
163  av_log(s, AV_LOG_ERROR, "%s codec not supported for Peak Chunk\n",
164  codec ? codec->name : "NONE");
165  return -1;
166  }
167 
168  wav->peak_bps = av_get_bits_per_sample(par->codec_id) / 8;
169 
170  if (wav->peak_bps == 1 && wav->peak_format == PEAK_FORMAT_UINT16) {
171  av_log(s, AV_LOG_ERROR,
172  "Writing 16 bit peak for 8 bit audio does not make sense\n");
173  return AVERROR(EINVAL);
174  }
175 
176  wav->peak_maxpos = av_mallocz_array(par->channels, sizeof(*wav->peak_maxpos));
177  wav->peak_maxneg = av_mallocz_array(par->channels, sizeof(*wav->peak_maxneg));
179  if (!wav->peak_maxpos || !wav->peak_maxneg || !wav->peak_output)
180  goto nomem;
181 
183 
184  return 0;
185 
186 nomem:
187  av_log(s, AV_LOG_ERROR, "Out of memory\n");
188  peak_free_buffers(s);
189  return AVERROR(ENOMEM);
190 }
191 
192 static void peak_write_frame(AVFormatContext *s)
193 {
194  WAVMuxContext *wav = s->priv_data;
195  AVCodecParameters *par = s->streams[0]->codecpar;
196  int c;
197 
198  if (!wav->peak_output)
199  return;
200 
201  for (c = 0; c < par->channels; c++) {
202  wav->peak_maxneg[c] = -wav->peak_maxneg[c];
203 
204  if (wav->peak_bps == 2 && wav->peak_format == PEAK_FORMAT_UINT8) {
205  wav->peak_maxpos[c] = wav->peak_maxpos[c] / 256;
206  wav->peak_maxneg[c] = wav->peak_maxneg[c] / 256;
207  }
208 
209  if (wav->peak_ppv == 1)
210  wav->peak_maxpos[c] =
211  FFMAX(wav->peak_maxpos[c], wav->peak_maxneg[c]);
212 
213  if (wav->peak_outbuf_size - wav->peak_outbuf_bytes <
214  wav->peak_format * wav->peak_ppv) {
216  wav->peak_output = av_realloc(wav->peak_output,
217  wav->peak_outbuf_size);
218  if (!wav->peak_output) {
219  av_log(s, AV_LOG_ERROR, "No memory for peak data\n");
220  return;
221  }
222  }
223 
224  if (wav->peak_format == PEAK_FORMAT_UINT8) {
225  wav->peak_output[wav->peak_outbuf_bytes++] =
226  wav->peak_maxpos[c];
227  if (wav->peak_ppv == 2) {
228  wav->peak_output[wav->peak_outbuf_bytes++] =
229  wav->peak_maxneg[c];
230  }
231  } else {
233  wav->peak_maxpos[c]);
234  wav->peak_outbuf_bytes += 2;
235  if (wav->peak_ppv == 2) {
237  wav->peak_maxneg[c]);
238  wav->peak_outbuf_bytes += 2;
239  }
240  }
241  wav->peak_maxpos[c] = 0;
242  wav->peak_maxneg[c] = 0;
243  }
244  wav->peak_num_frames++;
245 }
246 
247 static int peak_write_chunk(AVFormatContext *s)
248 {
249  WAVMuxContext *wav = s->priv_data;
250  AVIOContext *pb = s->pb;
251  AVCodecParameters *par = s->streams[0]->codecpar;
252  int64_t peak = ff_start_tag(s->pb, "levl");
253  int64_t now0;
254  time_t now_secs;
255  char timestamp[28];
256 
257  /* Peak frame of incomplete block at end */
258  if (wav->peak_block_pos)
259  peak_write_frame(s);
260 
261  memset(timestamp, 0, sizeof(timestamp));
262  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
263  struct tm tmpbuf;
264  av_log(s, AV_LOG_INFO, "Writing local time and date to Peak Envelope Chunk\n");
265  now0 = av_gettime();
266  now_secs = now0 / 1000000;
267  if (strftime(timestamp, sizeof(timestamp), "%Y:%m:%d:%H:%M:%S:", localtime_r(&now_secs, &tmpbuf))) {
268  av_strlcatf(timestamp, sizeof(timestamp), "%03d", (int)((now0 / 1000) % 1000));
269  } else {
270  av_log(s, AV_LOG_ERROR, "Failed to write timestamp\n");
271  return -1;
272  }
273  }
274 
275  avio_wl32(pb, 1); /* version */
276  avio_wl32(pb, wav->peak_format); /* 8 or 16 bit */
277  avio_wl32(pb, wav->peak_ppv); /* positive and negative */
278  avio_wl32(pb, wav->peak_block_size); /* frames per value */
279  avio_wl32(pb, par->channels); /* number of channels */
280  avio_wl32(pb, wav->peak_num_frames); /* number of peak frames */
281  avio_wl32(pb, -1); /* audio sample frame position (not implemented) */
282  avio_wl32(pb, 128); /* equal to size of header */
283  avio_write(pb, timestamp, 28); /* ASCII time stamp */
284  ffio_fill(pb, 0, 60);
285 
286  avio_write(pb, wav->peak_output, wav->peak_outbuf_bytes);
287 
288  ff_end_tag(pb, peak);
289 
290  if (!wav->data)
291  wav->data = peak;
292 
293  return 0;
294 }
295 
296 static int wav_write_header(AVFormatContext *s)
297 {
298  WAVMuxContext *wav = s->priv_data;
299  AVIOContext *pb = s->pb;
300  int64_t fmt;
301 
302  if (s->nb_streams != 1) {
303  av_log(s, AV_LOG_ERROR, "WAVE files have exactly one stream\n");
304  return AVERROR(EINVAL);
305  }
306 
307  if (wav->rf64 == RF64_ALWAYS) {
308  ffio_wfourcc(pb, "RF64");
309  avio_wl32(pb, -1); /* RF64 chunk size: use size in ds64 */
310  } else {
311  ffio_wfourcc(pb, "RIFF");
312  avio_wl32(pb, -1); /* file length */
313  }
314 
315  ffio_wfourcc(pb, "WAVE");
316 
317  if (wav->rf64 != RF64_NEVER) {
318  /* write empty ds64 chunk or JUNK chunk to reserve space for ds64 */
319  ffio_wfourcc(pb, wav->rf64 == RF64_ALWAYS ? "ds64" : "JUNK");
320  avio_wl32(pb, 28); /* chunk size */
321  wav->ds64 = avio_tell(pb);
322  ffio_fill(pb, 0, 28);
323  }
324 
325  if (wav->write_peak != PEAK_ONLY) {
326  /* format header */
327  fmt = ff_start_tag(pb, "fmt ");
328  if (ff_put_wav_header(s, pb, s->streams[0]->codecpar, 0) < 0) {
330  av_log(s, AV_LOG_ERROR, "%s codec not supported in WAVE format\n",
331  desc ? desc->name : "unknown");
332  return AVERROR(ENOSYS);
333  }
334  ff_end_tag(pb, fmt);
335  }
336 
337  if (s->streams[0]->codecpar->codec_tag != 0x01 /* hence for all other than PCM */
338  && (s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
339  wav->fact_pos = ff_start_tag(pb, "fact");
340  avio_wl32(pb, 0);
341  ff_end_tag(pb, wav->fact_pos);
342  }
343 
344  if (wav->write_bext)
345  bwf_write_bext_chunk(s);
346 
347  if (wav->write_peak) {
348  int ret;
349  if ((ret = peak_init_writer(s)) < 0)
350  return ret;
351  }
352 
353  avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codecpar->sample_rate);
354  wav->maxpts = wav->last_duration = 0;
355  wav->minpts = INT64_MAX;
356 
357  if (wav->write_peak != PEAK_ONLY) {
358  /* info header */
360 
361  /* data header */
362  wav->data = ff_start_tag(pb, "data");
363  }
364 
365  avio_flush(pb);
366 
367  return 0;
368 }
369 
370 static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
371 {
372  AVIOContext *pb = s->pb;
373  WAVMuxContext *wav = s->priv_data;
374 
375  if (wav->write_peak != PEAK_ONLY)
376  avio_write(pb, pkt->data, pkt->size);
377 
378  if (wav->write_peak) {
379  int c = 0;
380  int i;
381  for (i = 0; i < pkt->size; i += wav->peak_bps) {
382  if (wav->peak_bps == 1) {
383  wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], *(int8_t*)(pkt->data + i));
384  wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], *(int8_t*)(pkt->data + i));
385  } else {
386  wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], (int16_t)AV_RL16(pkt->data + i));
387  wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], (int16_t)AV_RL16(pkt->data + i));
388  }
389  if (++c == s->streams[0]->codecpar->channels) {
390  c = 0;
391  if (++wav->peak_block_pos == wav->peak_block_size) {
392  peak_write_frame(s);
393  wav->peak_block_pos = 0;
394  }
395  }
396  }
397  }
398 
399  if(pkt->pts != AV_NOPTS_VALUE) {
400  wav->minpts = FFMIN(wav->minpts, pkt->pts);
401  wav->maxpts = FFMAX(wav->maxpts, pkt->pts);
402  wav->last_duration = pkt->duration;
403  } else
404  av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
405  return 0;
406 }
407 
408 static int wav_write_trailer(AVFormatContext *s)
409 {
410  AVIOContext *pb = s->pb;
411  WAVMuxContext *wav = s->priv_data;
412  int64_t file_size, data_size;
413  int64_t number_of_samples = 0;
414  int rf64 = 0;
415  int ret = 0;
416 
417  avio_flush(pb);
418 
419  if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
420  if (wav->write_peak != PEAK_ONLY && avio_tell(pb) - wav->data < UINT32_MAX) {
421  ff_end_tag(pb, wav->data);
422  avio_flush(pb);
423  }
424 
425  if (wav->write_peak && wav->peak_output) {
426  ret = peak_write_chunk(s);
427  avio_flush(pb);
428  }
429 
430  /* update file size */
431  file_size = avio_tell(pb);
432  data_size = file_size - wav->data;
433  if (wav->rf64 == RF64_ALWAYS || (wav->rf64 == RF64_AUTO && file_size - 8 > UINT32_MAX)) {
434  rf64 = 1;
435  } else if (file_size - 8 <= UINT32_MAX) {
436  avio_seek(pb, 4, SEEK_SET);
437  avio_wl32(pb, (uint32_t)(file_size - 8));
438  avio_seek(pb, file_size, SEEK_SET);
439 
440  avio_flush(pb);
441  } else {
442  av_log(s, AV_LOG_ERROR,
443  "Filesize %"PRId64" invalid for wav, output file will be broken\n",
444  file_size);
445  }
446 
447  number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
448  s->streams[0]->codecpar->sample_rate * (int64_t)s->streams[0]->time_base.num,
449  s->streams[0]->time_base.den);
450 
451  if(s->streams[0]->codecpar->codec_tag != 0x01) {
452  /* Update num_samps in fact chunk */
453  avio_seek(pb, wav->fact_pos, SEEK_SET);
454  if (rf64 || (wav->rf64 == RF64_AUTO && number_of_samples > UINT32_MAX)) {
455  rf64 = 1;
456  avio_wl32(pb, -1);
457  } else {
458  avio_wl32(pb, number_of_samples);
459  avio_seek(pb, file_size, SEEK_SET);
460  avio_flush(pb);
461  }
462  }
463 
464  if (rf64) {
465  /* overwrite RIFF with RF64 */
466  avio_seek(pb, 0, SEEK_SET);
467  ffio_wfourcc(pb, "RF64");
468  avio_wl32(pb, -1);
469 
470  /* write ds64 chunk (overwrite JUNK if rf64 == RF64_AUTO) */
471  avio_seek(pb, wav->ds64 - 8, SEEK_SET);
472  ffio_wfourcc(pb, "ds64");
473  avio_wl32(pb, 28); /* ds64 chunk size */
474  avio_wl64(pb, file_size - 8); /* RF64 chunk size */
475  avio_wl64(pb, data_size); /* data chunk size */
476  avio_wl64(pb, number_of_samples); /* fact chunk number of samples */
477  avio_wl32(pb, 0); /* number of table entries for non-'data' chunks */
478 
479  /* write -1 in data chunk size */
480  avio_seek(pb, wav->data - 4, SEEK_SET);
481  avio_wl32(pb, -1);
482 
483  avio_seek(pb, file_size, SEEK_SET);
484  avio_flush(pb);
485  }
486  }
487 
488  if (wav->write_peak)
489  peak_free_buffers(s);
490 
491  return ret;
492 }
493 
494 #define OFFSET(x) offsetof(WAVMuxContext, x)
495 #define ENC AV_OPT_FLAG_ENCODING_PARAM
496 static const AVOption options[] = {
497  { "write_bext", "Write BEXT chunk.", OFFSET(write_bext), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
498  { "write_peak", "Write Peak Envelope chunk.", OFFSET(write_peak), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, ENC, "peak" },
499  { "off", "Do not write peak chunk.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_OFF }, 0, 0, ENC, "peak" },
500  { "on", "Append peak chunk after wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ON }, 0, 0, ENC, "peak" },
501  { "only", "Write only peak chunk, omit wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ONLY }, 0, 0, ENC, "peak" },
502  { "rf64", "Use RF64 header rather than RIFF for large files.", OFFSET(rf64), AV_OPT_TYPE_INT, { .i64 = RF64_NEVER },-1, 1, ENC, "rf64" },
503  { "auto", "Write RF64 header if file grows large enough.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_AUTO }, 0, 0, ENC, "rf64" },
504  { "always", "Always write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_ALWAYS }, 0, 0, ENC, "rf64" },
505  { "never", "Never write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_NEVER }, 0, 0, ENC, "rf64" },
506  { "peak_block_size", "Number of audio samples used to generate each peak frame.", OFFSET(peak_block_size), AV_OPT_TYPE_INT, { .i64 = 256 }, 0, 65536, ENC },
507  { "peak_format", "The format of the peak envelope data (1: uint8, 2: uint16).", OFFSET(peak_format), AV_OPT_TYPE_INT, { .i64 = PEAK_FORMAT_UINT16 }, PEAK_FORMAT_UINT8, PEAK_FORMAT_UINT16, ENC },
508  { "peak_ppv", "Number of peak points per peak value (1 or 2).", OFFSET(peak_ppv), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, 2, ENC },
509  { NULL },
510 };
511 
512 static const AVClass wav_muxer_class = {
513  .class_name = "WAV muxer",
514  .item_name = av_default_item_name,
515  .option = options,
516  .version = LIBAVUTIL_VERSION_INT,
517 };
518 
520  .name = "wav",
521  .long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
522  .mime_type = "audio/x-wav",
523  .extensions = "wav",
524  .priv_data_size = sizeof(WAVMuxContext),
525  .audio_codec = AV_CODEC_ID_PCM_S16LE,
526  .video_codec = AV_CODEC_ID_NONE,
527  .write_header = wav_write_header,
528  .write_packet = wav_write_packet,
529  .write_trailer = wav_write_trailer,
531  .codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
532  .priv_class = &wav_muxer_class,
533 };
534 #endif /* CONFIG_WAV_MUXER */
535 
536 #if CONFIG_W64_MUXER
537 #include "w64.h"
538 
539 static void start_guid(AVIOContext *pb, const uint8_t *guid, int64_t *pos)
540 {
541  *pos = avio_tell(pb);
542 
543  avio_write(pb, guid, 16);
544  avio_wl64(pb, INT64_MAX);
545 }
546 
547 static void end_guid(AVIOContext *pb, int64_t start)
548 {
549  int64_t end, pos = avio_tell(pb);
550 
551  end = FFALIGN(pos, 8);
552  ffio_fill(pb, 0, end - pos);
553  avio_seek(pb, start + 16, SEEK_SET);
554  avio_wl64(pb, end - start);
555  avio_seek(pb, end, SEEK_SET);
556 }
557 
558 static int w64_write_header(AVFormatContext *s)
559 {
560  WAVMuxContext *wav = s->priv_data;
561  AVIOContext *pb = s->pb;
562  int64_t start;
563  int ret;
564 
566  avio_wl64(pb, -1);
568  start_guid(pb, ff_w64_guid_fmt, &start);
569  if ((ret = ff_put_wav_header(s, pb, s->streams[0]->codecpar, 0)) < 0) {
571  av_log(s, AV_LOG_ERROR, "%s codec not supported\n",
572  codec ? codec->name : "NONE");
573  return ret;
574  }
575  end_guid(pb, start);
576 
577  if (s->streams[0]->codecpar->codec_tag != 0x01 /* hence for all other than PCM */
578  && (s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
579  start_guid(pb, ff_w64_guid_fact, &wav->fact_pos);
580  avio_wl64(pb, 0);
581  end_guid(pb, wav->fact_pos);
582  }
583 
584  start_guid(pb, ff_w64_guid_data, &wav->data);
585 
586  return 0;
587 }
588 
589 static int w64_write_trailer(AVFormatContext *s)
590 {
591  AVIOContext *pb = s->pb;
592  WAVMuxContext *wav = s->priv_data;
593  int64_t file_size;
594 
595  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
596  end_guid(pb, wav->data);
597 
598  file_size = avio_tell(pb);
599  avio_seek(pb, 16, SEEK_SET);
600  avio_wl64(pb, file_size);
601 
602  if (s->streams[0]->codecpar->codec_tag != 0x01) {
603  int64_t number_of_samples;
604 
605  number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
606  s->streams[0]->codecpar->sample_rate * (int64_t)s->streams[0]->time_base.num,
607  s->streams[0]->time_base.den);
608  avio_seek(pb, wav->fact_pos + 24, SEEK_SET);
609  avio_wl64(pb, number_of_samples);
610  }
611 
612  avio_seek(pb, file_size, SEEK_SET);
613  avio_flush(pb);
614  }
615 
616  return 0;
617 }
618 
620  .name = "w64",
621  .long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
622  .extensions = "w64",
623  .priv_data_size = sizeof(WAVMuxContext),
624  .audio_codec = AV_CODEC_ID_PCM_S16LE,
625  .video_codec = AV_CODEC_ID_NONE,
626  .write_header = w64_write_header,
627  .write_packet = wav_write_packet,
628  .write_trailer = w64_write_trailer,
630  .codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, 0 },
631 };
632 #endif /* CONFIG_W64_MUXER */
Definition: wavenc.c:57
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:690
void avio_wb64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:466
#define NULL
Definition: coverity.c:32
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:472
Bytestream IO Context.
Definition: avio.h:161
const uint8_t ff_w64_guid_wave[16]
Definition: w64.c:28
Buffered I/O operations.
int16_t * peak_maxpos
Definition: wavenc.c:73
void ff_end_tag(AVIOContext *pb, int64_t start)
Definition: riffenc.c:38
int64_t ff_start_tag(AVIOContext *pb, const char *tag)
Definition: riffenc.c:31
#define RF64_ALWAYS
Definition: wavenc.c:51
AVOption.
Definition: opt.h:246
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
int ff_put_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int flags)
Write WAVEFORMAT header structure.
Definition: riffenc.c:54
int64_t minpts
Definition: wavenc.c:71
const uint8_t ff_w64_guid_fact[16]
Definition: w64.c:38
const char * fmt
Definition: avisynth_c.h:861
int peak_format
Definition: wavenc.c:83
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4930
const char * desc
Definition: nvenc.c:68
int write_peak
Definition: wavenc.c:80
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3971
int num
Numerator.
Definition: rational.h:59
int size
Definition: avcodec.h:1484
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
const char * key
static AVPacket pkt
int64_t ds64
Definition: wavenc.c:70
AVCodec.
Definition: avcodec.h:3495
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
#define AVFMT_TS_NONSTRICT
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition: avformat.h:477
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3963
int64_t fact_pos
Definition: wavenc.c:69
int peak_block_pos
Definition: wavenc.c:84
Format I/O context.
Definition: avformat.h:1358
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
Public dictionary API.
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:372
uint8_t
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1501
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1489
uint8_t * data
Definition: avcodec.h:1483
uint32_t tag
Definition: movenc.c:1531
PeakFormat
Definition: wavenc.c:61
int64_t data
Definition: wavenc.c:68
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:58
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1506
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:460
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1533
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1598
PeakType
Definition: wavenc.c:55
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option keep it simple and lowercase description are in without and describe what they for example set the foo of the bar offset is the offset of the field in your local see the OFFSET() macro
const char * name
Name of the codec implementation.
Definition: avcodec.h:3502
const AVCodecTag ff_codec_wav_tags[]
Definition: riff.c:502
AVOutputFormat ff_wav_muxer
#define FFMAX(a, b)
Definition: common.h:94
int16_t * peak_maxneg
Definition: wavenc.c:73
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3301
AVOutputFormat ff_w64_muxer
int write_bext
Definition: wavenc.c:79
int peak_block_size
Definition: wavenc.c:82
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
void ffio_fill(AVIOContext *s, int b, int count)
Definition: aviobuf.c:204
#define FFMIN(a, b)
Definition: common.h:96
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
const uint8_t ff_w64_guid_data[16]
Definition: w64.c:42
const char * name
Definition: avformat.h:505
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
const uint8_t ff_w64_guid_riff[16]
Definition: w64.c:23
#define s(width, name)
Definition: cbs_vp9.c:257
int avio_put_str(AVIOContext *s, const char *str)
Write a NULL-terminated string.
Definition: aviobuf.c:388
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
#define RF64_AUTO
Definition: wavenc.c:49
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:898
int64_t maxpts
Definition: wavenc.c:72
#define ENC
Definition: caca.c:203
uint32_t peak_num_frames
Definition: wavenc.c:74
void ff_riff_write_info(AVFormatContext *s)
Write all recognized RIFF tags from s->metadata.
Definition: riffenc.c:327
Describe the class of an AVClass context structure.
Definition: log.h:67
void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:238
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:101
#define RF64_NEVER
Definition: wavenc.c:50
const char * name
Name of the codec described by this descriptor.
Definition: avcodec.h:730
This struct describes the properties of a single codec described by an AVCodecID. ...
Definition: avcodec.h:722
int rf64
Definition: wavenc.c:81
#define flags(name, subs,...)
Definition: cbs_av1.c:561
const uint8_t ff_w64_guid_fmt[16]
Definition: w64.c:33
int sample_rate
Audio only.
Definition: avcodec.h:4081
Main libavformat public API header.
const OptionDef options[]
Definition: ffmpeg_opt.c:3374
common internal and external API header
uint32_t peak_outbuf_size
Definition: wavenc.c:75
uint32_t peak_outbuf_bytes
Definition: wavenc.c:76
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
uint8_t * peak_output
Definition: wavenc.c:77
#define localtime_r
Definition: time_internal.h:46
int den
Denominator.
Definition: rational.h:60
char * value
Definition: dict.h:87
int len
int peak_bps
Definition: wavenc.c:86
void * priv_data
Format private data.
Definition: avformat.h:1386
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:349
#define PEAK_BUFFER_SIZE
Definition: wavenc.c:53
int channels
Audio only.
Definition: avcodec.h:4077
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:766
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3975
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:910
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
This structure stores compressed data.
Definition: avcodec.h:1460
int peak_ppv
Definition: wavenc.c:85
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1476
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
int last_duration
Definition: wavenc.c:78
void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.c:191