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 "config_components.h"
32 
33 #include <stdint.h>
34 #include <string.h>
35 #include <time.h>
36 
37 #include "libavutil/avstring.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/common.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/mathematics.h"
42 #include "libavutil/opt.h"
43 #include "libavutil/time.h"
44 #include "libavutil/time_internal.h"
45 
46 #include "avformat.h"
47 #include "avio.h"
48 #include "avio_internal.h"
49 #include "internal.h"
50 #include "mux.h"
51 #include "riff.h"
52 
53 #define RF64_AUTO (-1)
54 #define RF64_NEVER 0
55 #define RF64_ALWAYS 1
56 
57 typedef enum {
58  PEAK_OFF = 0,
59  PEAK_ON,
60  PEAK_ONLY
61 } PeakType;
62 
63 typedef enum {
64  PEAK_FORMAT_UINT8 = 1,
65  PEAK_FORMAT_UINT16
66 } PeakFormat;
67 
68 typedef struct WAVMuxContext {
69  const AVClass *class;
70  int64_t data;
71  int64_t fact_pos;
72  int64_t ds64;
73  int64_t minpts;
74  int64_t maxpts;
75  int16_t *peak_maxpos, *peak_maxneg;
76  uint32_t peak_num_frames;
77  unsigned peak_outbuf_size;
78  uint32_t peak_outbuf_bytes;
79  unsigned size_increment;
80  uint8_t *peak_output;
81  int last_duration;
82  int write_bext;
83  int write_peak;
84  int rf64;
85  int peak_block_size;
86  int peak_format;
87  int peak_block_pos;
88  int peak_ppv;
89  int peak_bps;
90 } WAVMuxContext;
91 
92 #if CONFIG_WAV_MUXER
93 static inline void bwf_write_bext_string(AVFormatContext *s, const char *key, int maxlen)
94 {
95  AVDictionaryEntry *tag;
96  size_t len = 0;
97 
98  if (tag = av_dict_get(s->metadata, key, NULL, 0)) {
99  len = strlen(tag->value);
100  len = FFMIN(len, maxlen);
101  avio_write(s->pb, tag->value, len);
102  }
103 
104  ffio_fill(s->pb, 0, maxlen - len);
105 }
106 
107 static void bwf_write_bext_chunk(AVFormatContext *s)
108 {
109  AVDictionaryEntry *tmp_tag;
110  uint64_t time_reference = 0;
111  int64_t bext = ff_start_tag(s->pb, "bext");
112 
113  bwf_write_bext_string(s, "description", 256);
114  bwf_write_bext_string(s, "originator", 32);
115  bwf_write_bext_string(s, "originator_reference", 32);
116  bwf_write_bext_string(s, "origination_date", 10);
117  bwf_write_bext_string(s, "origination_time", 8);
118 
119  if (tmp_tag = av_dict_get(s->metadata, "time_reference", NULL, 0))
120  time_reference = strtoll(tmp_tag->value, NULL, 10);
121  avio_wl64(s->pb, time_reference);
122  avio_wl16(s->pb, 1); // set version to 1
123 
124  if ((tmp_tag = av_dict_get(s->metadata, "umid", NULL, 0)) && strlen(tmp_tag->value) > 2) {
125  unsigned char umidpart_str[17] = {0};
126  int64_t i;
127  uint64_t umidpart;
128  size_t len = strlen(tmp_tag->value+2);
129 
130  for (i = 0; i < len/16; i++) {
131  memcpy(umidpart_str, tmp_tag->value + 2 + (i*16), 16);
132  umidpart = strtoll(umidpart_str, NULL, 16);
133  avio_wb64(s->pb, umidpart);
134  }
135  ffio_fill(s->pb, 0, 64 - i*8);
136  } else
137  ffio_fill(s->pb, 0, 64); // zero UMID
138 
139  ffio_fill(s->pb, 0, 190); // Reserved
140 
141  if (tmp_tag = av_dict_get(s->metadata, "coding_history", NULL, 0))
142  avio_put_str(s->pb, tmp_tag->value);
143 
144  ff_end_tag(s->pb, bext);
145 }
146 
147 static av_cold void wav_deinit(AVFormatContext *s)
148 {
149  WAVMuxContext *wav = s->priv_data;
150 
151  av_freep(&wav->peak_maxpos);
152  av_freep(&wav->peak_maxneg);
153  av_freep(&wav->peak_output);
154 }
155 
156 static av_cold int peak_init_writer(AVFormatContext *s)
157 {
158  WAVMuxContext *wav = s->priv_data;
159  AVCodecParameters *par = s->streams[0]->codecpar;
160 
161  if (par->codec_id != AV_CODEC_ID_PCM_S8 &&
162  par->codec_id != AV_CODEC_ID_PCM_S16LE &&
163  par->codec_id != AV_CODEC_ID_PCM_U8 &&
164  par->codec_id != AV_CODEC_ID_PCM_U16LE) {
165  av_log(s, AV_LOG_ERROR, "Codec %s not supported for Peak Chunk\n",
166  avcodec_get_name(par->codec_id));
167  return -1;
168  }
169 
170  wav->peak_bps = av_get_bits_per_sample(par->codec_id) / 8;
171 
172  if (wav->peak_bps == 1 && wav->peak_format == PEAK_FORMAT_UINT16) {
173  av_log(s, AV_LOG_ERROR,
174  "Writing 16 bit peak for 8 bit audio does not make sense\n");
175  return AVERROR(EINVAL);
176  }
177  if (par->ch_layout.nb_channels > INT_MAX / (wav->peak_bps * wav->peak_ppv))
178  return AVERROR(ERANGE);
179  wav->size_increment = par->ch_layout.nb_channels * wav->peak_bps * wav->peak_ppv;
180 
181  wav->peak_maxpos = av_calloc(par->ch_layout.nb_channels, sizeof(*wav->peak_maxpos));
182  wav->peak_maxneg = av_calloc(par->ch_layout.nb_channels, sizeof(*wav->peak_maxneg));
183  if (!wav->peak_maxpos || !wav->peak_maxneg)
184  goto nomem;
185 
186  return 0;
187 
188 nomem:
189  av_log(s, AV_LOG_ERROR, "Out of memory\n");
190  return AVERROR(ENOMEM);
191 }
192 
193 static int peak_write_frame(AVFormatContext *s)
194 {
195  WAVMuxContext *wav = s->priv_data;
196  AVCodecParameters *par = s->streams[0]->codecpar;
197  unsigned new_size = wav->peak_outbuf_bytes + wav->size_increment;
198  uint8_t *tmp;
199  int c;
200 
201  if (new_size > INT_MAX) {
202  wav->write_peak = PEAK_OFF;
203  return AVERROR(ERANGE);
204  }
205  tmp = av_fast_realloc(wav->peak_output, &wav->peak_outbuf_size, new_size);
206  if (!tmp) {
207  wav->write_peak = PEAK_OFF;
208  return AVERROR(ENOMEM);
209  }
210  wav->peak_output = tmp;
211 
212  for (c = 0; c < par->ch_layout.nb_channels; c++) {
213  wav->peak_maxneg[c] = -wav->peak_maxneg[c];
214 
215  if (wav->peak_bps == 2 && wav->peak_format == PEAK_FORMAT_UINT8) {
216  wav->peak_maxpos[c] = wav->peak_maxpos[c] / 256;
217  wav->peak_maxneg[c] = wav->peak_maxneg[c] / 256;
218  }
219 
220  if (wav->peak_ppv == 1)
221  wav->peak_maxpos[c] =
222  FFMAX(wav->peak_maxpos[c], wav->peak_maxneg[c]);
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 {
232  AV_WL16(wav->peak_output + wav->peak_outbuf_bytes,
233  wav->peak_maxpos[c]);
234  wav->peak_outbuf_bytes += 2;
235  if (wav->peak_ppv == 2) {
236  AV_WL16(wav->peak_output + wav->peak_outbuf_bytes,
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  return 0;
247 }
248 
249 static int peak_write_chunk(AVFormatContext *s)
250 {
251  WAVMuxContext *wav = s->priv_data;
252  AVIOContext *pb = s->pb;
253  AVCodecParameters *par = s->streams[0]->codecpar;
254  int64_t peak = ff_start_tag(s->pb, "levl");
255  int64_t now0;
256  time_t now_secs;
257  char timestamp[28];
258 
259  /* Peak frame of incomplete block at end */
260  if (wav->peak_block_pos) {
261  int ret = peak_write_frame(s);
262  if (ret < 0)
263  return ret;
264  }
265 
266  memset(timestamp, 0, sizeof(timestamp));
267  if (!(s->flags & AVFMT_FLAG_BITEXACT)) {
268  struct tm tmpbuf;
269  av_log(s, AV_LOG_INFO, "Writing local time and date to Peak Envelope Chunk\n");
270  now0 = av_gettime();
271  now_secs = now0 / 1000000;
272  if (strftime(timestamp, sizeof(timestamp), "%Y:%m:%d:%H:%M:%S:", localtime_r(&now_secs, &tmpbuf))) {
273  av_strlcatf(timestamp, sizeof(timestamp), "%03d", (int)((now0 / 1000) % 1000));
274  } else {
275  av_log(s, AV_LOG_ERROR, "Failed to write timestamp\n");
276  return -1;
277  }
278  }
279 
280  avio_wl32(pb, 1); /* version */
281  avio_wl32(pb, wav->peak_format); /* 8 or 16 bit */
282  avio_wl32(pb, wav->peak_ppv); /* positive and negative */
283  avio_wl32(pb, wav->peak_block_size); /* frames per value */
284  avio_wl32(pb, par->ch_layout.nb_channels); /* number of channels */
285  avio_wl32(pb, wav->peak_num_frames); /* number of peak frames */
286  avio_wl32(pb, -1); /* audio sample frame position (not implemented) */
287  avio_wl32(pb, 128); /* equal to size of header */
288  avio_write(pb, timestamp, 28); /* ASCII time stamp */
289  ffio_fill(pb, 0, 60);
290 
291  avio_write(pb, wav->peak_output, wav->peak_outbuf_bytes);
292 
293  ff_end_tag(pb, peak);
294 
295  if (!wav->data)
296  wav->data = peak;
297 
298  return 0;
299 }
300 
301 static int wav_write_header(AVFormatContext *s)
302 {
303  WAVMuxContext *wav = s->priv_data;
304  AVIOContext *pb = s->pb;
305  int64_t fmt;
306 
307  if (s->nb_streams != 1) {
308  av_log(s, AV_LOG_ERROR, "WAVE files have exactly one stream\n");
309  return AVERROR(EINVAL);
310  }
311 
312  if (wav->rf64 == RF64_ALWAYS) {
313  ffio_wfourcc(pb, "RF64");
314  avio_wl32(pb, -1); /* RF64 chunk size: use size in ds64 */
315  } else {
316  ffio_wfourcc(pb, "RIFF");
317  avio_wl32(pb, -1); /* file length */
318  }
319 
320  ffio_wfourcc(pb, "WAVE");
321 
322  if (wav->rf64 != RF64_NEVER) {
323  /* write empty ds64 chunk or JUNK chunk to reserve space for ds64 */
324  ffio_wfourcc(pb, wav->rf64 == RF64_ALWAYS ? "ds64" : "JUNK");
325  avio_wl32(pb, 28); /* chunk size */
326  wav->ds64 = avio_tell(pb);
327  ffio_fill(pb, 0, 28);
328  }
329 
330  if (wav->write_peak != PEAK_ONLY) {
331  /* format header */
332  fmt = ff_start_tag(pb, "fmt ");
333  if (ff_put_wav_header(s, pb, s->streams[0]->codecpar, 0) < 0) {
334  av_log(s, AV_LOG_ERROR, "Codec %s not supported in WAVE format\n",
335  avcodec_get_name(s->streams[0]->codecpar->codec_id));
336  return AVERROR(ENOSYS);
337  }
338  ff_end_tag(pb, fmt);
339  }
340 
341  if (s->streams[0]->codecpar->codec_tag != 0x01 /* hence for all other than PCM */
342  && (s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
343  wav->fact_pos = ff_start_tag(pb, "fact");
344  avio_wl32(pb, 0);
345  ff_end_tag(pb, wav->fact_pos);
346  }
347 
348  if (wav->write_bext)
349  bwf_write_bext_chunk(s);
350 
351  if (wav->write_peak) {
352  int ret;
353  if ((ret = peak_init_writer(s)) < 0)
354  return ret;
355  }
356 
357  avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codecpar->sample_rate);
358  wav->maxpts = wav->last_duration = 0;
359  wav->minpts = INT64_MAX;
360 
361  if (wav->write_peak != PEAK_ONLY) {
362  /* info header */
363  ff_riff_write_info(s);
364 
365  /* data header */
366  wav->data = ff_start_tag(pb, "data");
367  }
368 
369  return 0;
370 }
371 
372 static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
373 {
374  AVIOContext *pb = s->pb;
375  WAVMuxContext *wav = s->priv_data;
376 
377  if (wav->write_peak != PEAK_ONLY)
378  avio_write(pb, pkt->data, pkt->size);
379 
380  if (wav->write_peak) {
381  int c = 0;
382  int i;
383  for (i = 0; i < pkt->size; i += wav->peak_bps) {
384  if (wav->peak_bps == 1) {
385  wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], *(int8_t*)(pkt->data + i));
386  wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], *(int8_t*)(pkt->data + i));
387  } else {
388  wav->peak_maxpos[c] = FFMAX(wav->peak_maxpos[c], (int16_t)AV_RL16(pkt->data + i));
389  wav->peak_maxneg[c] = FFMIN(wav->peak_maxneg[c], (int16_t)AV_RL16(pkt->data + i));
390  }
391  if (++c == s->streams[0]->codecpar->ch_layout.nb_channels) {
392  c = 0;
393  if (++wav->peak_block_pos == wav->peak_block_size) {
394  int ret = peak_write_frame(s);
395  if (ret < 0)
396  return ret;
397  wav->peak_block_pos = 0;
398  }
399  }
400  }
401  }
402 
403  if(pkt->pts != AV_NOPTS_VALUE) {
404  wav->minpts = FFMIN(wav->minpts, pkt->pts);
405  wav->maxpts = FFMAX(wav->maxpts, pkt->pts);
406  wav->last_duration = pkt->duration;
407  } else
408  av_log(s, AV_LOG_ERROR, "wav_write_packet: NOPTS\n");
409  return 0;
410 }
411 
412 static int wav_write_trailer(AVFormatContext *s)
413 {
414  AVIOContext *pb = s->pb;
415  WAVMuxContext *wav = s->priv_data;
416  int64_t file_size, data_size;
417  int64_t number_of_samples = 0;
418  int rf64 = 0;
419  int ret = 0;
420 
421  if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
422  if (wav->write_peak != PEAK_ONLY && avio_tell(pb) - wav->data < UINT32_MAX) {
423  ff_end_tag(pb, wav->data);
424  }
425 
426  if (wav->write_peak && wav->peak_output) {
427  ret = peak_write_chunk(s);
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  } else {
440  av_log(s, AV_LOG_ERROR,
441  "Filesize %"PRId64" invalid for wav, output file will be broken\n",
442  file_size);
443  }
444  number_of_samples = av_rescale_q(wav->maxpts - wav->minpts + wav->last_duration,
445  s->streams[0]->time_base,
446  av_make_q(1, s->streams[0]->codecpar->sample_rate));
447 
448  if(s->streams[0]->codecpar->codec_tag != 0x01) {
449  /* Update num_samps in fact chunk */
450  avio_seek(pb, wav->fact_pos, SEEK_SET);
451  if (rf64 || (wav->rf64 == RF64_AUTO && number_of_samples > UINT32_MAX)) {
452  rf64 = 1;
453  avio_wl32(pb, -1);
454  } else {
455  avio_wl32(pb, number_of_samples);
456  avio_seek(pb, file_size, SEEK_SET);
457  }
458  }
459 
460  if (rf64) {
461  /* overwrite RIFF with RF64 */
462  avio_seek(pb, 0, SEEK_SET);
463  ffio_wfourcc(pb, "RF64");
464  avio_wl32(pb, -1);
465 
466  /* write ds64 chunk (overwrite JUNK if rf64 == RF64_AUTO) */
467  avio_seek(pb, wav->ds64 - 8, SEEK_SET);
468  ffio_wfourcc(pb, "ds64");
469  avio_wl32(pb, 28); /* ds64 chunk size */
470  avio_wl64(pb, file_size - 8); /* RF64 chunk size */
471  avio_wl64(pb, data_size); /* data chunk size */
472  avio_wl64(pb, number_of_samples); /* fact chunk number of samples */
473  avio_wl32(pb, 0); /* number of table entries for non-'data' chunks */
474 
475  /* write -1 in data chunk size */
476  avio_seek(pb, wav->data - 4, SEEK_SET);
477  avio_wl32(pb, -1);
478 
479  avio_seek(pb, file_size, SEEK_SET);
480  }
481  }
482 
483  return ret;
484 }
485 
486 #define OFFSET(x) offsetof(WAVMuxContext, x)
487 #define ENC AV_OPT_FLAG_ENCODING_PARAM
488 static const AVOption options[] = {
489  { "write_bext", "Write BEXT chunk.", OFFSET(write_bext), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
490  { "write_peak", "Write Peak Envelope chunk.", OFFSET(write_peak), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, ENC, "peak" },
491  { "off", "Do not write peak chunk.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_OFF }, 0, 0, ENC, "peak" },
492  { "on", "Append peak chunk after wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ON }, 0, 0, ENC, "peak" },
493  { "only", "Write only peak chunk, omit wav data.", 0, AV_OPT_TYPE_CONST, { .i64 = PEAK_ONLY }, 0, 0, ENC, "peak" },
494  { "rf64", "Use RF64 header rather than RIFF for large files.", OFFSET(rf64), AV_OPT_TYPE_INT, { .i64 = RF64_NEVER },-1, 1, ENC, "rf64" },
495  { "auto", "Write RF64 header if file grows large enough.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_AUTO }, 0, 0, ENC, "rf64" },
496  { "always", "Always write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_ALWAYS }, 0, 0, ENC, "rf64" },
497  { "never", "Never write RF64 header regardless of file size.", 0, AV_OPT_TYPE_CONST, { .i64 = RF64_NEVER }, 0, 0, ENC, "rf64" },
498  { "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 },
499  { "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 },
500  { "peak_ppv", "Number of peak points per peak value (1 or 2).", OFFSET(peak_ppv), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, 2, ENC },
501  { NULL },
502 };
503 
504 static const AVClass wav_muxer_class = {
505  .class_name = "WAV muxer",
506  .item_name = av_default_item_name,
507  .option = options,
508  .version = LIBAVUTIL_VERSION_INT,
509 };
510 
511 const FFOutputFormat ff_wav_muxer = {
512  .p.name = "wav",
513  .p.long_name = NULL_IF_CONFIG_SMALL("WAV / WAVE (Waveform Audio)"),
514  .p.mime_type = "audio/x-wav",
515  .p.extensions = "wav",
516  .priv_data_size = sizeof(WAVMuxContext),
517  .p.audio_codec = AV_CODEC_ID_PCM_S16LE,
518  .p.video_codec = AV_CODEC_ID_NONE,
519  .write_header = wav_write_header,
520  .write_packet = wav_write_packet,
521  .write_trailer = wav_write_trailer,
522  .deinit = wav_deinit,
523  .p.flags = AVFMT_TS_NONSTRICT,
524  .p.codec_tag = ff_wav_codec_tags_list,
525  .p.priv_class = &wav_muxer_class,
526 };
527 #endif /* CONFIG_WAV_MUXER */
528 
529 #if CONFIG_W64_MUXER
530 #include "w64.h"
531 
532 static av_cold int w64_init(AVFormatContext *ctx)
533 {
534  if (ctx->nb_streams != 1) {
535  av_log(ctx, AV_LOG_ERROR, "This muxer only supports a single stream.\n");
536  return AVERROR(EINVAL);
537  }
538 
539  return 0;
540 }
541 
542 static void start_guid(AVIOContext *pb, const uint8_t *guid, int64_t *pos)
543 {
544  *pos = avio_tell(pb);
545 
546  avio_write(pb, guid, 16);
547  avio_wl64(pb, INT64_MAX);
548 }
549 
550 static void end_guid(AVIOContext *pb, int64_t start)
551 {
552  int64_t end, pos = avio_tell(pb);
553 
554  end = FFALIGN(pos, 8);
555  ffio_fill(pb, 0, end - pos);
556  avio_seek(pb, start + 16, SEEK_SET);
557  avio_wl64(pb, end - start);
558  avio_seek(pb, end, SEEK_SET);
559 }
560 
561 static int w64_write_header(AVFormatContext *s)
562 {
563  WAVMuxContext *wav = s->priv_data;
564  AVIOContext *pb = s->pb;
565  int64_t start;
566  int ret;
567 
568  avio_write(pb, ff_w64_guid_riff, sizeof(ff_w64_guid_riff));
569  avio_wl64(pb, -1);
570  avio_write(pb, ff_w64_guid_wave, sizeof(ff_w64_guid_wave));
571  start_guid(pb, ff_w64_guid_fmt, &start);
572  if ((ret = ff_put_wav_header(s, pb, s->streams[0]->codecpar, 0)) < 0) {
573  av_log(s, AV_LOG_ERROR, "Codec %s not supported\n",
574  avcodec_get_name(s->streams[0]->codecpar->codec_id));
575  return ret;
576  }
577  end_guid(pb, start);
578 
579  if (s->streams[0]->codecpar->codec_tag != 0x01 /* hence for all other than PCM */
580  && (s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
581  start_guid(pb, ff_w64_guid_fact, &wav->fact_pos);
582  avio_wl64(pb, 0);
583  end_guid(pb, wav->fact_pos);
584  }
585 
586  start_guid(pb, ff_w64_guid_data, &wav->data);
587 
588  return 0;
589 }
590 
591 static int w64_write_trailer(AVFormatContext *s)
592 {
593  AVIOContext *pb = s->pb;
594  WAVMuxContext *wav = s->priv_data;
595  int64_t file_size;
596 
597  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
598  end_guid(pb, wav->data);
599 
600  file_size = avio_tell(pb);
601  avio_seek(pb, 16, SEEK_SET);
602  avio_wl64(pb, file_size);
603 
604  if (s->streams[0]->codecpar->codec_tag != 0x01) {
605  int64_t number_of_samples;
606 
607  number_of_samples = av_rescale(wav->maxpts - wav->minpts + wav->last_duration,
608  s->streams[0]->codecpar->sample_rate * (int64_t)s->streams[0]->time_base.num,
609  s->streams[0]->time_base.den);
610  avio_seek(pb, wav->fact_pos + 24, SEEK_SET);
611  avio_wl64(pb, number_of_samples);
612  }
613 
614  avio_seek(pb, file_size, SEEK_SET);
615  }
616 
617  return 0;
618 }
619 
620 const FFOutputFormat ff_w64_muxer = {
621  .p.name = "w64",
622  .p.long_name = NULL_IF_CONFIG_SMALL("Sony Wave64"),
623  .p.extensions = "w64",
624  .priv_data_size = sizeof(WAVMuxContext),
625  .p.audio_codec = AV_CODEC_ID_PCM_S16LE,
626  .p.video_codec = AV_CODEC_ID_NONE,
627  .init = w64_init,
628  .write_header = w64_write_header,
629  .write_packet = wav_write_packet,
630  .write_trailer = w64_write_trailer,
631  .p.flags = AVFMT_TS_NONSTRICT,
632  .p.codec_tag = ff_wav_codec_tags_list,
633 };
634 #endif /* CONFIG_W64_MUXER */
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:330
WAVMuxContext::peak_output
uint8_t * peak_output
Definition: wavenc.c:80
AVOutputFormat::name
const char * name
Definition: avformat.h:511
AVERROR
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
opt.h
WAVMuxContext::peak_maxneg
int16_t * peak_maxneg
Definition: wavenc.c:75
ffio_wfourcc
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:128
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:47
WAVMuxContext::maxpts
int64_t maxpts
Definition: wavenc.c:74
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
AVPacket::data
uint8_t * data
Definition: packet.h:491
AVOption
AVOption.
Definition: opt.h:251
PeakFormat
PeakFormat
Definition: wavenc.c:63
avio_wl64
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:472
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:509
mathematics.h
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:317
WAVMuxContext::peak_outbuf_bytes
uint32_t peak_outbuf_bytes
Definition: wavenc.c:78
WAVMuxContext::fact_pos
int64_t fact_pos
Definition: wavenc.c:71
av_strlcatf
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:103
ff_wav_muxer
const FFOutputFormat ff_wav_muxer
FFOutputFormat::p
AVOutputFormat p
The public AVOutputFormat.
Definition: mux.h:36
PEAK_ONLY
@ PEAK_ONLY
Definition: wavenc.c:60
avio_wl16
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:484
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:761
WAVMuxContext::peak_bps
int peak_bps
Definition: wavenc.c:89
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:513
RF64_AUTO
#define RF64_AUTO
Definition: wavenc.c:53
ENC
#define ENC
Definition: caca.c:197
PEAK_FORMAT_UINT16
@ PEAK_FORMAT_UINT16
Definition: wavenc.c:65
ff_start_tag
int64_t ff_start_tag(AVIOContext *pb, const char *tag)
Definition: riffenc.c:31
av_get_bits_per_sample
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:558
AV_CODEC_ID_PCM_S8
@ AV_CODEC_ID_PCM_S8
Definition: codec_id.h:334
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
av_dict_get
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:62
av_fast_realloc
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given buffer if it is not large enough, otherwise do nothing.
Definition: mem.c:495
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
RF64_NEVER
#define RF64_NEVER
Definition: wavenc.c:54
PEAK_FORMAT_UINT8
@ PEAK_FORMAT_UINT8
Definition: wavenc.c:64
ctx
AVFormatContext * ctx
Definition: movenc.c:48
PEAK_ON
@ PEAK_ON
Definition: wavenc.c:59
AV_RL16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:94
av_rescale_q
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
RF64_ALWAYS
#define RF64_ALWAYS
Definition: wavenc.c:55
key
const char * key
Definition: hwcontext_opencl.c:174
WAVMuxContext::data
int64_t data
Definition: wavenc.c:70
time_internal.h
WAVMuxContext::rf64
int rf64
Definition: wavenc.c:84
AVFormatContext
Format I/O context.
Definition: avformat.h:1115
internal.h
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
PEAK_OFF
@ PEAK_OFF
Definition: wavenc.c:58
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
WAVMuxContext::last_duration
int last_duration
Definition: wavenc.c:81
NULL
#define NULL
Definition: coverity.c:32
ff_put_wav_header
int ff_put_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int flags)
Write WAVEFORMAT header structure.
Definition: riffenc.c:54
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
FFOutputFormat
Definition: mux.h:32
time.h
WAVMuxContext::peak_block_pos
int peak_block_pos
Definition: wavenc.c:87
ffio_fill
void ffio_fill(AVIOContext *s, int b, int64_t count)
Definition: aviobuf.c:234
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:206
c
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
ff_w64_guid_fmt
const uint8_t ff_w64_guid_fmt[16]
Definition: w64.c:33
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1171
ff_w64_muxer
const FFOutputFormat ff_w64_muxer
options
const OptionDef options[]
AVIOContext
Bytestream IO Context.
Definition: avio.h:166
AVPacket::size
int size
Definition: packet.h:492
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:106
WAVMuxContext::write_bext
int write_bext
Definition: wavenc.c:82
PeakType
PeakType
Definition: wavenc.c:57
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:271
localtime_r
#define localtime_r
Definition: time_internal.h:46
av_make_q
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
avio.h
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
WAVMuxContext::minpts
int64_t minpts
Definition: wavenc.c:73
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:248
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:410
avio_wl32
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:404
WAVMuxContext
Definition: wavenc.c:68
ff_end_tag
void ff_end_tag(AVIOContext *pb, int64_t start)
Definition: riffenc.c:38
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:191
WAVMuxContext::write_peak
int write_peak
Definition: wavenc.c:83
avcodec_get_name
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:417
WAVMuxContext::peak_block_size
int peak_block_size
Definition: wavenc.c:85
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:50
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:484
avio_internal.h
ff_w64_guid_wave
const uint8_t ff_w64_guid_wave[16]
Definition: w64.c:28
common.h
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
WAVMuxContext::peak_maxpos
int16_t * peak_maxpos
Definition: wavenc.c:75
ff_w64_guid_fact
const uint8_t ff_w64_guid_fact[16]
Definition: w64.c:38
len
int len
Definition: vorbis_enc_data.h:426
av_rescale
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
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:262
AVFMT_TS_NONSTRICT
#define AVFMT_TS_NONSTRICT
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition: avformat.h:492
WAVMuxContext::peak_ppv
int peak_ppv
Definition: wavenc.c:88
tag
uint32_t tag
Definition: movenc.c:1737
AVFMT_FLAG_BITEXACT
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1250
ret
ret
Definition: filter_design.txt:187
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:278
AVClass::class_name
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:71
WAVMuxContext::peak_outbuf_size
unsigned peak_outbuf_size
Definition: wavenc.c:77
pos
unsigned int pos
Definition: spdifenc.c:413
avformat.h
dict.h
OFFSET
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 see the OFFSET() macro
w64.h
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:41
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
ff_riff_write_info
void ff_riff_write_info(AVFormatContext *s)
Write all recognized RIFF tags from s->metadata.
Definition: riffenc.c:336
WAVMuxContext::peak_format
int peak_format
Definition: wavenc.c:86
WAVMuxContext::ds64
int64_t ds64
Definition: wavenc.c:72
avio_wb64
void avio_wb64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:478
av_gettime
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
ff_w64_guid_data
const uint8_t ff_w64_guid_data[16]
Definition: w64.c:42
AV_CODEC_ID_PCM_U8
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:335
ff_w64_guid_riff
const uint8_t ff_w64_guid_riff[16]
Definition: w64.c:23
AVDictionaryEntry
Definition: dict.h:89
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:55
AVPacket
This structure stores compressed data.
Definition: packet.h:468
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
riff.h
AV_CODEC_ID_PCM_U16LE
@ AV_CODEC_ID_PCM_U16LE
Definition: codec_id.h:332
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVDictionaryEntry::value
char * value
Definition: dict.h:91
WAVMuxContext::size_increment
unsigned size_increment
Definition: wavenc.c:79
avstring.h
avio_put_str
int avio_put_str(AVIOContext *s, const char *str)
Write a NULL-terminated string.
Definition: aviobuf.c:420
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
ff_wav_codec_tags_list
const AVCodecTag *const ff_wav_codec_tags_list[]
WAVMuxContext::peak_num_frames
uint32_t peak_num_frames
Definition: wavenc.c:76
mux.h
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