FFmpeg  4.4.6
dvenc.c
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1 /*
2  * General DV muxer/demuxer
3  * Copyright (c) 2003 Roman Shaposhnik
4  *
5  * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
6  * of DV technical info.
7  *
8  * Raw DV format
9  * Copyright (c) 2002 Fabrice Bellard
10  *
11  * 50 Mbps (DVCPRO50) support
12  * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
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 #include <time.h>
31 
33 #include "avformat.h"
34 #include "internal.h"
35 #include "libavcodec/dv_profile.h"
36 #include "libavcodec/dv.h"
37 #include "dv.h"
38 #include "libavutil/avassert.h"
39 #include "libavutil/fifo.h"
40 #include "libavutil/mathematics.h"
41 #include "libavutil/intreadwrite.h"
42 #include "libavutil/opt.h"
43 #include "libavutil/timecode.h"
44 
45 #define MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32-bit audio
46 
47 struct DVMuxContext {
49  const AVDVProfile* sys; /* current DV profile, e.g.: 525/60, 625/50 */
50  int n_ast; /* number of stereo audio streams (up to 2) */
51  AVStream *ast[4]; /* stereo audio streams */
52  AVFifoBuffer *audio_data[4]; /* FIFO for storing excessive amounts of PCM */
53  int frames; /* current frame number */
54  int64_t start_time; /* recording start time */
55  int has_audio; /* frame under construction has audio */
56  int has_video; /* frame under construction has video */
57  uint8_t frame_buf[DV_MAX_FRAME_SIZE]; /* frame under construction */
58  AVTimecode tc; /* timecode context */
59 };
60 
61 static const int dv_aaux_packs_dist[12][9] = {
62  { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
63  { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
64  { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
65  { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
66  { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
67  { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
68  { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
69  { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
70  { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
71  { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
72  { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
73  { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
74 };
75 
76 static void brktimegm(time_t secs, struct tm *tm)
77 {
78  tm = gmtime_r(&secs, tm);
79 
80  tm->tm_year += 1900; /* unlike gmtime_r we store complete year here */
81  tm->tm_mon += 1; /* unlike gmtime_r tm_mon is from 1 to 12 */
82 }
83 
84 static int dv_audio_frame_size(const AVDVProfile* sys, int frame, int sample_rate)
85 {
86  if ((sys->time_base.den == 25 || sys->time_base.den == 50) && sys->time_base.num == 1) {
87  if (sample_rate == 32000) return 1280;
88  else if (sample_rate == 44100) return 1764;
89  else return 1920;
90  }
91 
92  av_assert0(sample_rate == 48000);
93 
94  return sys->audio_samples_dist[frame % (sizeof(sys->audio_samples_dist) /
95  sizeof(sys->audio_samples_dist[0]))];
96 }
97 
98 static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* buf, int channel, int seq)
99 {
100  struct tm tc;
101  time_t ct;
102  uint32_t timecode;
103  int audio_type = 0;
104 
105  buf[0] = (uint8_t)pack_id;
106  switch (pack_id) {
107  case dv_timecode:
108  timecode = av_timecode_get_smpte_from_framenum(&c->tc, c->frames);
109  timecode |= 1<<23 | 1<<15 | 1<<7 | 1<<6; // biphase and binary group flags
110  AV_WB32(buf + 1, timecode);
111  break;
112  case dv_audio_source: /* AAUX source pack */
113  if (c->ast[channel]->codecpar->sample_rate == 44100) {
114  audio_type = 1;
115  } else if (c->ast[channel]->codecpar->sample_rate == 32000)
116  audio_type = 2;
117  buf[1] = (1 << 7) | /* locked mode -- SMPTE only supports locked mode */
118  (1 << 6) | /* reserved -- always 1 */
119  (dv_audio_frame_size(c->sys, c->frames, c->ast[channel]->codecpar->sample_rate) -
120  c->sys->audio_min_samples[audio_type]);
121  /* # of samples */
122  buf[2] = (0 << 7) | /* multi-stereo */
123  (0 << 5) | /* #of audio channels per block: 0 -- 1 channel */
124  (0 << 4) | /* pair bit: 0 -- one pair of channels */
125  (seq >= c->sys->difseg_size/2); /* audio mode (1st or 2nd channel) */
126  buf[3] = (1 << 7) | /* res */
127  (1 << 6) | /* multi-language flag */
128  (c->sys->dsf << 5) | /* system: 60fields/50fields */
129  (DV_PROFILE_IS_HD(c->sys) ? 0x3 : c->sys->video_stype ? 2 : 0); /* stype */
130  buf[4] = (1 << 7) | /* emphasis: 1 -- off */
131  (0 << 6) | /* emphasis time constant: 0 -- reserved */
132  (audio_type << 3) | /* frequency: 0 -- 48kHz, 1 -- 44,1kHz, 2 -- 32kHz */
133  0; /* quantization: 0 -- 16-bit linear, 1 -- 12-bit nonlinear */
134 
135  break;
136  case dv_audio_control:
137  buf[1] = (0 << 6) | /* copy protection: 0 -- unrestricted */
138  (1 << 4) | /* input source: 1 -- digital input */
139  (3 << 2) | /* compression: 3 -- no information */
140  0; /* misc. info/SMPTE emphasis off */
141  buf[2] = (1 << 7) | /* recording start point: 1 -- no */
142  (1 << 6) | /* recording end point: 1 -- no */
143  (1 << 3) | /* recording mode: 1 -- original */
144  7;
145  buf[3] = (1 << 7) | /* direction: 1 -- forward */
146  (c->sys->pix_fmt == AV_PIX_FMT_YUV420P ? 0x20 : /* speed */
147  c->sys->ltc_divisor * 4);
148  buf[4] = (1 << 7) | /* reserved -- always 1 */
149  0x7f; /* genre category */
150  break;
151  case dv_audio_recdate:
152  case dv_video_recdate: /* VAUX recording date */
153  ct = c->start_time + av_rescale_rnd(c->frames, c->sys->time_base.num,
154  c->sys->time_base.den, AV_ROUND_DOWN);
155  brktimegm(ct, &tc);
156  buf[1] = 0xff; /* ds, tm, tens of time zone, units of time zone */
157  /* 0xff is very likely to be "unknown" */
158  buf[2] = (3 << 6) | /* reserved -- always 1 */
159  ((tc.tm_mday / 10) << 4) | /* Tens of day */
160  (tc.tm_mday % 10); /* Units of day */
161  buf[3] = /* we set high 4 bits to 0, shouldn't we set them to week? */
162  ((tc.tm_mon / 10) << 4) | /* Tens of month */
163  (tc.tm_mon % 10); /* Units of month */
164  buf[4] = (((tc.tm_year % 100) / 10) << 4) | /* Tens of year */
165  (tc.tm_year % 10); /* Units of year */
166  break;
167  case dv_audio_rectime: /* AAUX recording time */
168  case dv_video_rectime: /* VAUX recording time */
169  ct = c->start_time + av_rescale_rnd(c->frames, c->sys->time_base.num,
170  c->sys->time_base.den, AV_ROUND_DOWN);
171  brktimegm(ct, &tc);
172  buf[1] = (3 << 6) | /* reserved -- always 1 */
173  0x3f; /* tens of frame, units of frame: 0x3f - "unknown" ? */
174  buf[2] = (1 << 7) | /* reserved -- always 1 */
175  ((tc.tm_sec / 10) << 4) | /* Tens of seconds */
176  (tc.tm_sec % 10); /* Units of seconds */
177  buf[3] = (1 << 7) | /* reserved -- always 1 */
178  ((tc.tm_min / 10) << 4) | /* Tens of minutes */
179  (tc.tm_min % 10); /* Units of minutes */
180  buf[4] = (3 << 6) | /* reserved -- always 1 */
181  ((tc.tm_hour / 10) << 4) | /* Tens of hours */
182  (tc.tm_hour % 10); /* Units of hours */
183  break;
184  default:
185  buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
186  }
187  return 5;
188 }
189 
190 static void dv_inject_audio(DVMuxContext *c, int channel, uint8_t* frame_ptr)
191 {
192  int i, j, d, of, size;
193  size = 4 * dv_audio_frame_size(c->sys, c->frames, c->ast[channel]->codecpar->sample_rate);
194  frame_ptr += channel * c->sys->difseg_size * 150 * 80;
195  for (i = 0; i < c->sys->difseg_size; i++) {
196  frame_ptr += 6 * 80; /* skip DIF segment header */
197  for (j = 0; j < 9; j++) {
198  dv_write_pack(dv_aaux_packs_dist[i][j], c, &frame_ptr[3], channel, i);
199  for (d = 8; d < 80; d+=2) {
200  of = c->sys->audio_shuffle[i][j] + (d - 8)/2 * c->sys->audio_stride;
201  if (of*2 >= size)
202  continue;
203 
204  frame_ptr[d] = *av_fifo_peek2(c->audio_data[channel], of*2+1); // FIXME: maybe we have to admit
205  frame_ptr[d+1] = *av_fifo_peek2(c->audio_data[channel], of*2); // that DV is a big-endian PCM
206  }
207  frame_ptr += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
208  }
209  }
210 }
211 
213 {
214  int j, k;
215  uint8_t* buf;
216  int seq = 0;
217 
218  for (buf = frame; buf < frame + c->sys->frame_size; buf += 150 * 80, seq++) {
219  /* DV subcode: 2nd and 3d DIFs */
220  for (j = 80; j < 80 * 3; j += 80) {
221  for (k = 6; k < 6 * 8; k += 8)
222  dv_write_pack(dv_timecode, c, &buf[j+k], 0, seq);
223 
224  if (((long)(buf-frame)/(c->sys->frame_size/(c->sys->difseg_size*c->sys->n_difchan))%c->sys->difseg_size) > 5) { /* FIXME: is this really needed ? */
225  dv_write_pack(dv_video_recdate, c, &buf[j+14], 0, seq);
226  dv_write_pack(dv_video_rectime, c, &buf[j+22], 0, seq);
227  dv_write_pack(dv_video_recdate, c, &buf[j+38], 0, seq);
228  dv_write_pack(dv_video_rectime, c, &buf[j+46], 0, seq);
229  }
230  }
231 
232  /* DV VAUX: 4th, 5th and 6th 3DIFs */
233  for (j = 80*3 + 3; j < 80*6; j += 80) {
234  dv_write_pack(dv_video_recdate, c, &buf[j+5* 2], 0, seq);
235  dv_write_pack(dv_video_rectime, c, &buf[j+5* 3], 0, seq);
236  dv_write_pack(dv_video_recdate, c, &buf[j+5*11], 0, seq);
237  dv_write_pack(dv_video_rectime, c, &buf[j+5*12], 0, seq);
238  }
239  }
240 }
241 
242 /*
243  * The following 3 functions constitute our interface to the world
244  */
245 
247  DVMuxContext *c, AVStream* st,
248  uint8_t* data, int data_size, uint8_t** frame)
249 {
250  int i, reqasize;
251 
252  *frame = &c->frame_buf[0];
253 
254  switch (st->codecpar->codec_type) {
255  case AVMEDIA_TYPE_VIDEO:
256  /* FIXME: we have to have more sensible approach than this one */
257  if (c->has_video)
258  av_log(s, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient audio data or severe sync problem.\n", c->frames);
259  if (data_size != c->sys->frame_size) {
260  av_log(s, AV_LOG_ERROR, "Unexpected frame size, %d != %d\n",
261  data_size, c->sys->frame_size);
262  return AVERROR(ENOSYS);
263  }
264 
265  memcpy(*frame, data, c->sys->frame_size);
266  c->has_video = 1;
267  break;
268  case AVMEDIA_TYPE_AUDIO:
269  for (i = 0; i < c->n_ast && st != c->ast[i]; i++);
270 
271  /* FIXME: we have to have more sensible approach than this one */
272  if (av_fifo_size(c->audio_data[i]) + data_size >= 100*MAX_AUDIO_FRAME_SIZE)
273  av_log(s, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient video data or severe sync problem.\n", c->frames);
274  av_fifo_generic_write(c->audio_data[i], data, data_size, NULL);
275 
276  reqasize = 4 * dv_audio_frame_size(c->sys, c->frames, st->codecpar->sample_rate);
277 
278  /* Let us see if we've got enough audio for one DV frame. */
279  c->has_audio |= ((reqasize <= av_fifo_size(c->audio_data[i])) << i);
280 
281  break;
282  default:
283  break;
284  }
285 
286  /* Let us see if we have enough data to construct one DV frame. */
287  if (c->has_video == 1 && c->has_audio + 1 == 1 << c->n_ast) {
289  c->has_audio = 0;
290  for (i=0; i < c->n_ast; i++) {
291  dv_inject_audio(c, i, *frame);
292  reqasize = 4 * dv_audio_frame_size(c->sys, c->frames, c->ast[i]->codecpar->sample_rate);
293  av_fifo_drain(c->audio_data[i], reqasize);
294  c->has_audio |= ((reqasize <= av_fifo_size(c->audio_data[i])) << i);
295  }
296 
297  c->has_video = 0;
298 
299  c->frames++;
300 
301  return c->sys->frame_size;
302  }
303 
304  return 0;
305 }
306 
308 {
309  DVMuxContext *c = s->priv_data;
310  AVStream *vst = NULL;
311  int i;
312 
313  /* we support at most 1 video and 2 audio streams */
314  if (s->nb_streams > 5)
315  return NULL;
316 
317  /* We have to sort out where audio and where video stream is */
318  for (i=0; i<s->nb_streams; i++) {
319  AVStream *st = s->streams[i];
320  switch (st->codecpar->codec_type) {
321  case AVMEDIA_TYPE_VIDEO:
322  if (vst) return NULL;
324  goto bail_out;
325  vst = st;
326  break;
327  case AVMEDIA_TYPE_AUDIO:
328  if (c->n_ast > 1) return NULL;
329  /* Some checks -- DV format is very picky about its incoming streams */
331  st->codecpar->channels != 2)
332  goto bail_out;
333  if (st->codecpar->sample_rate != 48000 &&
334  st->codecpar->sample_rate != 44100 &&
335  st->codecpar->sample_rate != 32000 )
336  goto bail_out;
337  c->ast[c->n_ast++] = st;
338  break;
339  default:
340  goto bail_out;
341  }
342  }
343 
344  if (!vst)
345  goto bail_out;
346 
347  c->sys = av_dv_codec_profile2(vst->codecpar->width, vst->codecpar->height,
348  vst->codecpar->format, vst->time_base);
349  if (!c->sys)
350  goto bail_out;
351 
352  if ((c->sys->time_base.den != 25 && c->sys->time_base.den != 50) || c->sys->time_base.num != 1) {
353  if (c->ast[0] && c->ast[0]->codecpar->sample_rate != 48000)
354  goto bail_out;
355  if (c->ast[1] && c->ast[1]->codecpar->sample_rate != 48000)
356  goto bail_out;
357  }
358 
359  if (((c->n_ast > 1) && (c->sys->n_difchan < 2)) ||
360  ((c->n_ast > 2) && (c->sys->n_difchan < 4))) {
361  /* only 2 stereo pairs allowed in 50Mbps mode */
362  goto bail_out;
363  }
364 
365  /* Ok, everything seems to be in working order */
366  c->frames = 0;
367  c->has_audio = 0;
368  c->has_video = 0;
369  ff_parse_creation_time_metadata(s, &c->start_time, 1);
370 
371  for (i=0; i < c->n_ast; i++) {
372  if (c->ast[i] && !(c->audio_data[i]=av_fifo_alloc_array(100, MAX_AUDIO_FRAME_SIZE))) {
373  goto bail_out;
374  }
375  }
376 
377  return c;
378 
379 bail_out:
380  return NULL;
381 }
382 
384 {
385  AVRational rate;
386  DVMuxContext *dvc = s->priv_data;
387  AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
388 
389  if (!dv_init_mux(s)) {
390  av_log(s, AV_LOG_ERROR, "Can't initialize DV format!\n"
391  "Make sure that you supply exactly two streams:\n"
392  " video: 25fps or 29.97fps, audio: 2ch/48|44|32kHz/PCM\n"
393  " (50Mbps allows an optional second audio stream)\n");
394  return -1;
395  }
396  rate.num = dvc->sys->ltc_divisor;
397  rate.den = 1;
398  if (!tcr) { // no global timecode, look into the streams
399  int i;
400  for (i = 0; i < s->nb_streams; i++) {
401  tcr = av_dict_get(s->streams[i]->metadata, "timecode", NULL, 0);
402  if (tcr)
403  break;
404  }
405  }
406  if (tcr && av_timecode_init_from_string(&dvc->tc, rate, tcr->value, s) >= 0)
407  return 0;
408  return av_timecode_init(&dvc->tc, rate, 0, 0, s);
409 }
410 
412 {
413  uint8_t* frame;
414  int fsize;
415 
416  fsize = dv_assemble_frame(s, s->priv_data, s->streams[pkt->stream_index],
417  pkt->data, pkt->size, &frame);
418  if (fsize < 0) {
419  return fsize;
420  }
421  avio_write(s->pb, frame, fsize);
422  return 0;
423 }
424 
425 /*
426  * We might end up with some extra A/V data without matching counterpart.
427  * E.g. video data without enough audio to write the complete frame.
428  * Currently we simply drop the last frame. I don't know whether this
429  * is the best strategy of all
430  */
432 {
433  DVMuxContext *c = s->priv_data;
434 
435  for (int i = 0; i < c->n_ast; i++)
436  av_fifo_freep(&c->audio_data[i]);
437 }
438 
440  .name = "dv",
441  .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
442  .extensions = "dv",
443  .priv_data_size = sizeof(DVMuxContext),
444  .audio_codec = AV_CODEC_ID_PCM_S16LE,
445  .video_codec = AV_CODEC_ID_DVVIDEO,
448  .deinit = dv_deinit,
449 };
uint8_t
static int64_t fsize(FILE *f)
Definition: audiomatch.c:29
simple assert() macros that are a bit more flexible than ISO C assert().
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Main libavformat public API header.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:225
#define s(width, name)
Definition: cbs_vp9.c:257
#define NULL
Definition: coverity.c:32
long long int64_t
Definition: coverity.c:34
static AVFrame * frame
const AVDVProfile * av_dv_codec_profile2(int width, int height, enum AVPixelFormat pix_fmt, AVRational frame_rate)
Get a DV profile for the provided stream parameters.
Definition: dv_profile.c:314
channel
Use these values when setting the channel map with ebur128_set_channel().
Definition: ebur128.h:39
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:730
sample_rate
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:346
a very simple circular buffer FIFO implementation
static uint8_t * av_fifo_peek2(const AVFifoBuffer *f, int offs)
Return a pointer to the data stored in a FIFO buffer at a certain offset.
Definition: fifo.h:169
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:313
@ AV_CODEC_ID_DVVIDEO
Definition: codec_id.h:73
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
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:58
@ AV_ROUND_DOWN
Round toward -infinity.
Definition: mathematics.h:82
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
int i
Definition: input.c:407
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
Constants for DV codec.
dv_pack_type
Definition: dv.h:69
@ dv_video_recdate
Definition: dv.h:79
@ dv_timecode
Definition: dv.h:72
@ dv_audio_control
Definition: dv.h:74
@ dv_audio_recdate
Definition: dv.h:75
@ dv_audio_rectime
Definition: dv.h:76
@ dv_video_rectime
Definition: dv.h:80
@ dv_audio_source
Definition: dv.h:73
#define DV_MAX_FRAME_SIZE
largest possible DV frame, in bytes (1080i50)
Definition: dv.h:92
#define DV_PROFILE_IS_HD(p)
Definition: dv.h:84
static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t *buf, int channel, int seq)
Definition: dvenc.c:98
static int dv_write_header(AVFormatContext *s)
Definition: dvenc.c:383
static int dv_audio_frame_size(const AVDVProfile *sys, int frame, int sample_rate)
Definition: dvenc.c:84
static const int dv_aaux_packs_dist[12][9]
Definition: dvenc.c:61
static void dv_deinit(AVFormatContext *s)
Definition: dvenc.c:431
static int dv_assemble_frame(AVFormatContext *s, DVMuxContext *c, AVStream *st, uint8_t *data, int data_size, uint8_t **frame)
Definition: dvenc.c:246
AVOutputFormat ff_dv_muxer
Definition: dvenc.c:439
static DVMuxContext * dv_init_mux(AVFormatContext *s)
Definition: dvenc.c:307
static void dv_inject_audio(DVMuxContext *c, int channel, uint8_t *frame_ptr)
Definition: dvenc.c:190
#define MAX_AUDIO_FRAME_SIZE
Definition: dvenc.c:45
static int dv_write_packet(struct AVFormatContext *s, AVPacket *pkt)
Definition: dvenc.c:411
static void brktimegm(time_t secs, struct tm *tm)
Definition: dvenc.c:76
static void dv_inject_metadata(DVMuxContext *c, uint8_t *frame)
Definition: dvenc.c:212
int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds)
Parse creation_time in AVFormatContext metadata if exists and warn if the parsing fails.
Definition: utils.c:5704
void av_fifo_drain(AVFifoBuffer *f, int size)
Discard data from the FIFO.
Definition: fifo.c:233
void av_fifo_freep(AVFifoBuffer **f)
Free an AVFifoBuffer and reset pointer to NULL.
Definition: fifo.c:63
int av_fifo_size(const AVFifoBuffer *f)
Return the amount of data in bytes in the AVFifoBuffer, that is the amount of data you can read from ...
Definition: fifo.c:77
AVFifoBuffer * av_fifo_alloc_array(size_t nmemb, size_t size)
Initialize an AVFifoBuffer.
Definition: fifo.c:49
int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size, int(*func)(void *, void *, int))
Feed data from a user-supplied callback to an AVFifoBuffer.
Definition: fifo.c:122
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
const char data[16]
Definition: mxf.c:142
AVOptions.
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
#define tc
Definition: regdef.h:69
Describe the class of an AVClass context structure.
Definition: log.h:67
int channels
Audio only.
Definition: codec_par.h:166
int width
Video only.
Definition: codec_par.h:126
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int sample_rate
Audio only.
Definition: codec_par.h:170
int audio_samples_dist[5]
Definition: dv_profile.h:56
int ltc_divisor
Definition: dv_profile.h:46
AVRational time_base
Definition: dv_profile.h:45
char * value
Definition: dict.h:83
Format I/O context.
Definition: avformat.h:1232
const char * name
Definition: avformat.h:491
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int num
Numerator.
Definition: rational.h:59
int den
Denominator.
Definition: rational.h:60
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:902
AVClass * av_class
Definition: dvenc.c:48
const AVDVProfile * sys
Definition: dvenc.c:49
AVFifoBuffer * audio_data[4]
Definition: dvenc.c:52
int has_video
Definition: dvenc.c:56
AVStream * ast[4]
Definition: dvenc.c:51
uint8_t frame_buf[DV_MAX_FRAME_SIZE]
Definition: dvenc.c:57
int64_t start_time
Definition: dvenc.c:54
int n_ast
Definition: dvenc.c:50
AVTimecode tc
Definition: dvenc.c:58
int frames
Definition: dvenc.c:53
int has_audio
Definition: dvenc.c:55
#define av_log(a,...)
AVPacket * pkt
Definition: movenc.c:59
#define gmtime_r
Definition: time_internal.h:34
int av_timecode_init_from_string(AVTimecode *tc, AVRational rate, const char *str, void *log_ctx)
Parse timecode representation (hh:mm:ss[:;.
Definition: timecode.c:250
int av_timecode_init(AVTimecode *tc, AVRational rate, int flags, int frame_start, void *log_ctx)
Init a timecode struct with the passed parameters.
Definition: timecode.c:219
uint32_t av_timecode_get_smpte_from_framenum(const AVTimecode *tc, int framenum)
Convert frame number to SMPTE 12M binary representation.
Definition: timecode.c:52
Timecode helpers header.
int size
if(ret< 0)
Definition: vf_mcdeint.c:282
static double c[64]