FFmpeg  4.3.9
dvenc.c
Go to the documentation of this file.
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 
32 #include "avformat.h"
33 #include "internal.h"
34 #include "libavcodec/dv_profile.h"
35 #include "libavcodec/dv.h"
36 #include "dv.h"
37 #include "libavutil/avassert.h"
38 #include "libavutil/fifo.h"
39 #include "libavutil/mathematics.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/opt.h"
42 #include "libavutil/timecode.h"
43 
44 #define MAX_AUDIO_FRAME_SIZE 192000 // 1 second of 48khz 32-bit audio
45 
46 struct DVMuxContext {
48  const AVDVProfile* sys; /* current DV profile, e.g.: 525/60, 625/50 */
49  int n_ast; /* number of stereo audio streams (up to 2) */
50  AVStream *ast[4]; /* stereo audio streams */
51  AVFifoBuffer *audio_data[4]; /* FIFO for storing excessive amounts of PCM */
52  int frames; /* current frame number */
53  int64_t start_time; /* recording start time */
54  int has_audio; /* frame under construction has audio */
55  int has_video; /* frame under construction has video */
56  uint8_t frame_buf[DV_MAX_FRAME_SIZE]; /* frame under construction */
57  AVTimecode tc; /* timecode context */
58 };
59 
60 static const int dv_aaux_packs_dist[12][9] = {
61  { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
62  { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
63  { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
64  { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
65  { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
66  { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
67  { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
68  { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
69  { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
70  { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
71  { 0xff, 0xff, 0xff, 0x50, 0x51, 0x52, 0x53, 0xff, 0xff },
72  { 0x50, 0x51, 0x52, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff },
73 };
74 
75 static int dv_audio_frame_size(const AVDVProfile* sys, int frame, int sample_rate)
76 {
77  if ((sys->time_base.den == 25 || sys->time_base.den == 50) && sys->time_base.num == 1) {
78  if (sample_rate == 32000) return 1280;
79  else if (sample_rate == 44100) return 1764;
80  else return 1920;
81  }
82 
83  av_assert0(sample_rate == 48000);
84 
85  return sys->audio_samples_dist[frame % (sizeof(sys->audio_samples_dist) /
86  sizeof(sys->audio_samples_dist[0]))];
87 }
88 
89 static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t* buf, int channel, int seq)
90 {
91  struct tm tc;
92  time_t ct;
93  uint32_t timecode;
94  int audio_type = 0;
95 
96  buf[0] = (uint8_t)pack_id;
97  switch (pack_id) {
98  case dv_timecode:
99  timecode = av_timecode_get_smpte_from_framenum(&c->tc, c->frames);
100  timecode |= 1<<23 | 1<<15 | 1<<7 | 1<<6; // biphase and binary group flags
101  AV_WB32(buf + 1, timecode);
102  break;
103  case dv_audio_source: /* AAUX source pack */
104  if (c->ast[channel]->codecpar->sample_rate == 44100) {
105  audio_type = 1;
106  } else if (c->ast[channel]->codecpar->sample_rate == 32000)
107  audio_type = 2;
108  buf[1] = (1 << 7) | /* locked mode -- SMPTE only supports locked mode */
109  (1 << 6) | /* reserved -- always 1 */
110  (dv_audio_frame_size(c->sys, c->frames, c->ast[channel]->codecpar->sample_rate) -
111  c->sys->audio_min_samples[audio_type]);
112  /* # of samples */
113  buf[2] = (0 << 7) | /* multi-stereo */
114  (0 << 5) | /* #of audio channels per block: 0 -- 1 channel */
115  (0 << 4) | /* pair bit: 0 -- one pair of channels */
116  (seq >= c->sys->difseg_size/2); /* audio mode (1st or 2nd channel) */
117  buf[3] = (1 << 7) | /* res */
118  (1 << 6) | /* multi-language flag */
119  (c->sys->dsf << 5) | /* system: 60fields/50fields */
120  (DV_PROFILE_IS_HD(c->sys) ? 0x3 : c->sys->video_stype ? 2 : 0); /* stype */
121  buf[4] = (1 << 7) | /* emphasis: 1 -- off */
122  (0 << 6) | /* emphasis time constant: 0 -- reserved */
123  (audio_type << 3) | /* frequency: 0 -- 48kHz, 1 -- 44,1kHz, 2 -- 32kHz */
124  0; /* quantization: 0 -- 16-bit linear, 1 -- 12-bit nonlinear */
125 
126  break;
127  case dv_audio_control:
128  buf[1] = (0 << 6) | /* copy protection: 0 -- unrestricted */
129  (1 << 4) | /* input source: 1 -- digital input */
130  (3 << 2) | /* compression: 3 -- no information */
131  0; /* misc. info/SMPTE emphasis off */
132  buf[2] = (1 << 7) | /* recording start point: 1 -- no */
133  (1 << 6) | /* recording end point: 1 -- no */
134  (1 << 3) | /* recording mode: 1 -- original */
135  7;
136  buf[3] = (1 << 7) | /* direction: 1 -- forward */
137  (c->sys->pix_fmt == AV_PIX_FMT_YUV420P ? 0x20 : /* speed */
138  c->sys->ltc_divisor * 4);
139  buf[4] = (1 << 7) | /* reserved -- always 1 */
140  0x7f; /* genre category */
141  break;
142  case dv_audio_recdate:
143  case dv_video_recdate: /* VAUX recording date */
144  ct = c->start_time + av_rescale_rnd(c->frames, c->sys->time_base.num,
146  ff_brktimegm(ct, &tc);
147  buf[1] = 0xff; /* ds, tm, tens of time zone, units of time zone */
148  /* 0xff is very likely to be "unknown" */
149  buf[2] = (3 << 6) | /* reserved -- always 1 */
150  ((tc.tm_mday / 10) << 4) | /* Tens of day */
151  (tc.tm_mday % 10); /* Units of day */
152  buf[3] = /* we set high 4 bits to 0, shouldn't we set them to week? */
153  ((tc.tm_mon / 10) << 4) | /* Tens of month */
154  (tc.tm_mon % 10); /* Units of month */
155  buf[4] = (((tc.tm_year % 100) / 10) << 4) | /* Tens of year */
156  (tc.tm_year % 10); /* Units of year */
157  break;
158  case dv_audio_rectime: /* AAUX recording time */
159  case dv_video_rectime: /* VAUX recording time */
160  ct = c->start_time + av_rescale_rnd(c->frames, c->sys->time_base.num,
162  ff_brktimegm(ct, &tc);
163  buf[1] = (3 << 6) | /* reserved -- always 1 */
164  0x3f; /* tens of frame, units of frame: 0x3f - "unknown" ? */
165  buf[2] = (1 << 7) | /* reserved -- always 1 */
166  ((tc.tm_sec / 10) << 4) | /* Tens of seconds */
167  (tc.tm_sec % 10); /* Units of seconds */
168  buf[3] = (1 << 7) | /* reserved -- always 1 */
169  ((tc.tm_min / 10) << 4) | /* Tens of minutes */
170  (tc.tm_min % 10); /* Units of minutes */
171  buf[4] = (3 << 6) | /* reserved -- always 1 */
172  ((tc.tm_hour / 10) << 4) | /* Tens of hours */
173  (tc.tm_hour % 10); /* Units of hours */
174  break;
175  default:
176  buf[1] = buf[2] = buf[3] = buf[4] = 0xff;
177  }
178  return 5;
179 }
180 
181 static void dv_inject_audio(DVMuxContext *c, int channel, uint8_t* frame_ptr)
182 {
183  int i, j, d, of, size;
184  size = 4 * dv_audio_frame_size(c->sys, c->frames, c->ast[channel]->codecpar->sample_rate);
185  frame_ptr += channel * c->sys->difseg_size * 150 * 80;
186  for (i = 0; i < c->sys->difseg_size; i++) {
187  frame_ptr += 6 * 80; /* skip DIF segment header */
188  for (j = 0; j < 9; j++) {
189  dv_write_pack(dv_aaux_packs_dist[i][j], c, &frame_ptr[3], channel, i);
190  for (d = 8; d < 80; d+=2) {
191  of = c->sys->audio_shuffle[i][j] + (d - 8)/2 * c->sys->audio_stride;
192  if (of*2 >= size)
193  continue;
194 
195  frame_ptr[d] = *av_fifo_peek2(c->audio_data[channel], of*2+1); // FIXME: maybe we have to admit
196  frame_ptr[d+1] = *av_fifo_peek2(c->audio_data[channel], of*2); // that DV is a big-endian PCM
197  }
198  frame_ptr += 16 * 80; /* 15 Video DIFs + 1 Audio DIF */
199  }
200  }
201 }
202 
204 {
205  int j, k;
206  uint8_t* buf;
207  int seq = 0;
208 
209  for (buf = frame; buf < frame + c->sys->frame_size; buf += 150 * 80, seq++) {
210  /* DV subcode: 2nd and 3d DIFs */
211  for (j = 80; j < 80 * 3; j += 80) {
212  for (k = 6; k < 6 * 8; k += 8)
213  dv_write_pack(dv_timecode, c, &buf[j+k], 0, seq);
214 
215  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 ? */
216  dv_write_pack(dv_video_recdate, c, &buf[j+14], 0, seq);
217  dv_write_pack(dv_video_rectime, c, &buf[j+22], 0, seq);
218  dv_write_pack(dv_video_recdate, c, &buf[j+38], 0, seq);
219  dv_write_pack(dv_video_rectime, c, &buf[j+46], 0, seq);
220  }
221  }
222 
223  /* DV VAUX: 4th, 5th and 6th 3DIFs */
224  for (j = 80*3 + 3; j < 80*6; j += 80) {
225  dv_write_pack(dv_video_recdate, c, &buf[j+5* 2], 0, seq);
226  dv_write_pack(dv_video_rectime, c, &buf[j+5* 3], 0, seq);
227  dv_write_pack(dv_video_recdate, c, &buf[j+5*11], 0, seq);
228  dv_write_pack(dv_video_rectime, c, &buf[j+5*12], 0, seq);
229  }
230  }
231 }
232 
233 /*
234  * The following 3 functions constitute our interface to the world
235  */
236 
238  DVMuxContext *c, AVStream* st,
239  uint8_t* data, int data_size, uint8_t** frame)
240 {
241  int i, reqasize;
242 
243  *frame = &c->frame_buf[0];
244 
245  switch (st->codecpar->codec_type) {
246  case AVMEDIA_TYPE_VIDEO:
247  /* FIXME: we have to have more sensible approach than this one */
248  if (c->has_video)
249  av_log(s, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient audio data or severe sync problem.\n", c->frames);
250  if (data_size != c->sys->frame_size) {
251  av_log(s, AV_LOG_ERROR, "Unexpected frame size, %d != %d\n",
252  data_size, c->sys->frame_size);
253  return AVERROR(ENOSYS);
254  }
255 
256  memcpy(*frame, data, c->sys->frame_size);
257  c->has_video = 1;
258  break;
259  case AVMEDIA_TYPE_AUDIO:
260  for (i = 0; i < c->n_ast && st != c->ast[i]; i++);
261 
262  /* FIXME: we have to have more sensible approach than this one */
263  if (av_fifo_size(c->audio_data[i]) + data_size >= 100*MAX_AUDIO_FRAME_SIZE)
264  av_log(s, AV_LOG_ERROR, "Can't process DV frame #%d. Insufficient video data or severe sync problem.\n", c->frames);
265  av_fifo_generic_write(c->audio_data[i], data, data_size, NULL);
266 
267  reqasize = 4 * dv_audio_frame_size(c->sys, c->frames, st->codecpar->sample_rate);
268 
269  /* Let us see if we've got enough audio for one DV frame. */
270  c->has_audio |= ((reqasize <= av_fifo_size(c->audio_data[i])) << i);
271 
272  break;
273  default:
274  break;
275  }
276 
277  /* Let us see if we have enough data to construct one DV frame. */
278  if (c->has_video == 1 && c->has_audio + 1 == 1 << c->n_ast) {
279  dv_inject_metadata(c, *frame);
280  c->has_audio = 0;
281  for (i=0; i < c->n_ast; i++) {
282  dv_inject_audio(c, i, *frame);
283  reqasize = 4 * dv_audio_frame_size(c->sys, c->frames, c->ast[i]->codecpar->sample_rate);
284  av_fifo_drain(c->audio_data[i], reqasize);
285  c->has_audio |= ((reqasize <= av_fifo_size(c->audio_data[i])) << i);
286  }
287 
288  c->has_video = 0;
289 
290  c->frames++;
291 
292  return c->sys->frame_size;
293  }
294 
295  return 0;
296 }
297 
299 {
300  DVMuxContext *c = s->priv_data;
301  AVStream *vst = NULL;
302  int i;
303 
304  /* we support at most 1 video and 2 audio streams */
305  if (s->nb_streams > 5)
306  return NULL;
307 
308  /* We have to sort out where audio and where video stream is */
309  for (i=0; i<s->nb_streams; i++) {
310  switch (s->streams[i]->codecpar->codec_type) {
311  case AVMEDIA_TYPE_VIDEO:
312  if (vst) return NULL;
313  vst = s->streams[i];
314  break;
315  case AVMEDIA_TYPE_AUDIO:
316  if (c->n_ast > 1) return NULL;
317  c->ast[c->n_ast++] = s->streams[i];
318  break;
319  default:
320  goto bail_out;
321  }
322  }
323 
324  /* Some checks -- DV format is very picky about its incoming streams */
325  if (!vst || vst->codecpar->codec_id != AV_CODEC_ID_DVVIDEO)
326  goto bail_out;
327  for (i=0; i<c->n_ast; i++) {
328  if (c->ast[i]) {
329  if(c->ast[i]->codecpar->codec_id != AV_CODEC_ID_PCM_S16LE ||
330  c->ast[i]->codecpar->channels != 2)
331  goto bail_out;
332  if (c->ast[i]->codecpar->sample_rate != 48000 &&
333  c->ast[i]->codecpar->sample_rate != 44100 &&
334  c->ast[i]->codecpar->sample_rate != 32000 )
335  goto bail_out;
336  }
337  }
339  vst->codecpar->format, vst->time_base);
340  if (!c->sys)
341  goto bail_out;
342 
343  if ((c->sys->time_base.den != 25 && c->sys->time_base.den != 50) || c->sys->time_base.num != 1) {
344  if (c->ast[0] && c->ast[0]->codecpar->sample_rate != 48000)
345  goto bail_out;
346  if (c->ast[1] && c->ast[1]->codecpar->sample_rate != 48000)
347  goto bail_out;
348  }
349 
350  if (((c->n_ast > 1) && (c->sys->n_difchan < 2)) ||
351  ((c->n_ast > 2) && (c->sys->n_difchan < 4))) {
352  /* only 2 stereo pairs allowed in 50Mbps mode */
353  goto bail_out;
354  }
355 
356  /* Ok, everything seems to be in working order */
357  c->frames = 0;
358  c->has_audio = 0;
359  c->has_video = 0;
361 
362  for (i=0; i < c->n_ast; i++) {
363  if (c->ast[i] && !(c->audio_data[i]=av_fifo_alloc_array(100, MAX_AUDIO_FRAME_SIZE))) {
364  goto bail_out;
365  }
366  }
367 
368  return c;
369 
370 bail_out:
371  return NULL;
372 }
373 
375 {
376  AVRational rate;
377  DVMuxContext *dvc = s->priv_data;
378  AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
379 
380  if (!dv_init_mux(s)) {
381  av_log(s, AV_LOG_ERROR, "Can't initialize DV format!\n"
382  "Make sure that you supply exactly two streams:\n"
383  " video: 25fps or 29.97fps, audio: 2ch/48|44|32kHz/PCM\n"
384  " (50Mbps allows an optional second audio stream)\n");
385  return -1;
386  }
387  rate.num = dvc->sys->ltc_divisor;
388  rate.den = 1;
389  if (!tcr) { // no global timecode, look into the streams
390  int i;
391  for (i = 0; i < s->nb_streams; i++) {
392  tcr = av_dict_get(s->streams[i]->metadata, "timecode", NULL, 0);
393  if (tcr)
394  break;
395  }
396  }
397  if (tcr && av_timecode_init_from_string(&dvc->tc, rate, tcr->value, s) >= 0)
398  return 0;
399  return av_timecode_init(&dvc->tc, rate, 0, 0, s);
400 }
401 
403 {
404  uint8_t* frame;
405  int fsize;
406 
407  fsize = dv_assemble_frame(s, s->priv_data, s->streams[pkt->stream_index],
408  pkt->data, pkt->size, &frame);
409  if (fsize > 0) {
410  avio_write(s->pb, frame, fsize);
411  }
412  return 0;
413 }
414 
415 /*
416  * We might end up with some extra A/V data without matching counterpart.
417  * E.g. video data without enough audio to write the complete frame.
418  * Currently we simply drop the last frame. I don't know whether this
419  * is the best strategy of all
420  */
422 {
423  DVMuxContext *c = s->priv_data;
424 
425  for (int i = 0; i < c->n_ast; i++)
426  av_fifo_freep(&c->audio_data[i]);
427 }
428 
430  .name = "dv",
431  .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
432  .extensions = "dv",
433  .priv_data_size = sizeof(DVMuxContext),
434  .audio_codec = AV_CODEC_ID_PCM_S16LE,
435  .video_codec = AV_CODEC_ID_DVVIDEO,
438  .deinit = dv_deinit,
439 };
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:703
#define NULL
Definition: coverity.c:32
int size
int ltc_divisor
Definition: dv_profile.h:46
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int num
Numerator.
Definition: rational.h:59
int size
Definition: packet.h:356
AVTimecode tc
Definition: dvenc.c:57
static AVPacket pkt
int audio_samples_dist[5]
Definition: dv_profile.h:56
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
Format I/O context.
Definition: avformat.h:1351
int64_t start_time
Definition: dvenc.c:53
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
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:194
AVFifoBuffer * audio_data[4]
Definition: dvenc.c:51
dv_pack_type
Definition: dv.h:69
uint8_t
#define MAX_AUDIO_FRAME_SIZE
Definition: dvenc.c:44
int width
Video only.
Definition: codec_par.h:126
const AVDVProfile * sys
Definition: dvenc.c:48
AVOptions.
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
static AVFrame * frame
const char data[16]
Definition: mxf.c:91
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 difseg_size
Definition: dv_profile.h:43
uint8_t * data
Definition: packet.h:355
static void dv_inject_metadata(DVMuxContext *c, uint8_t *frame)
Definition: dvenc.c:203
enum AVPixelFormat pix_fmt
Definition: dv_profile.h:50
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:213
AVRational time_base
Definition: dv_profile.h:45
#define av_log(a,...)
const uint8_t(* audio_shuffle)[9]
Definition: dv_profile.h:58
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:184
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:5707
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
int audio_min_samples[3]
Definition: dv_profile.h:54
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1591
Round toward -infinity.
Definition: mathematics.h:82
static void dv_inject_audio(DVMuxContext *c, int channel, uint8_t *frame_ptr)
Definition: dvenc.c:181
#define AVERROR(e)
Definition: error.h:43
static int dv_audio_frame_size(const AVDVProfile *sys, int frame, int sample_rate)
Definition: dvenc.c:75
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
int frame_size
Definition: dv_profile.h:42
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
simple assert() macros that are a bit more flexible than ISO C assert().
AVClass * av_class
Definition: dvenc.c:47
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
struct tm * ff_brktimegm(time_t secs, struct tm *tm)
Definition: cutils.c:31
int n_ast
Definition: dvenc.c:49
static int dv_write_header(AVFormatContext *s)
Definition: dvenc.c:374
const char * name
Definition: avformat.h:500
#define DV_PROFILE_IS_HD(p)
Definition: dv.h:84
#define s(width, name)
Definition: cbs_vp9.c:257
AVDictionary * metadata
Definition: avformat.h:940
AVStream * ast[4]
Definition: dvenc.c:50
int has_video
Definition: dvenc.c:55
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
Stream structure.
Definition: avformat.h:876
sample_rate
int has_audio
Definition: dvenc.c:54
Definition: dv.h:72
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
Timecode helpers header.
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
long long int64_t
Definition: coverity.c:34
#define DV_MAX_FRAME_SIZE
largest possible DV frame, in bytes (1080i50)
Definition: dv.h:92
a very simple circular buffer FIFO implementation
static int dv_assemble_frame(AVFormatContext *s, DVMuxContext *c, AVStream *st, uint8_t *data, int data_size, uint8_t **frame)
Definition: dvenc.c:237
int audio_stride
Definition: dv_profile.h:53
Describe the class of an AVClass context structure.
Definition: log.h:67
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int video_stype
Definition: dv_profile.h:41
static const int dv_aaux_packs_dist[12][9]
Definition: dvenc.c:60
static DVMuxContext * dv_init_mux(AVFormatContext *s)
Definition: dvenc.c:298
AVFifoBuffer * av_fifo_alloc_array(size_t nmemb, size_t size)
Initialize an AVFifoBuffer.
Definition: fifo.c:49
uint8_t frame_buf[DV_MAX_FRAME_SIZE]
Definition: dvenc.c:56
int sample_rate
Audio only.
Definition: codec_par.h:170
Main libavformat public API header.
static void dv_deinit(AVFormatContext *s)
Definition: dvenc.c:421
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
if(ret< 0)
Definition: vf_mcdeint.c:279
static double c[64]
channel
Use these values when setting the channel map with ebur128_set_channel().
Definition: ebur128.h:39
Constants for DV codec.
int den
Denominator.
Definition: rational.h:60
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:316
char * value
Definition: dict.h:87
static int dv_write_pack(enum dv_pack_type pack_id, DVMuxContext *c, uint8_t *buf, int channel, int seq)
Definition: dvenc.c:89
void * priv_data
Format private data.
Definition: avformat.h:1379
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:346
int frames
Definition: dvenc.c:52
AVOutputFormat ff_dv_muxer
Definition: dvenc.c:429
int channels
Audio only.
Definition: codec_par.h:166
void av_fifo_freep(AVFifoBuffer **f)
Free an AVFifoBuffer and reset pointer to NULL.
Definition: fifo.c:63
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
static int64_t fsize(FILE *f)
Definition: audiomatch.c:28
int n_difchan
Definition: dv_profile.h:44
int stream_index
Definition: packet.h:357
static int dv_write_packet(struct AVFormatContext *s, AVPacket *pkt)
Definition: dvenc.c:402
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
void av_fifo_drain(AVFifoBuffer *f, int size)
Discard data from the FIFO.
Definition: fifo.c:233
This structure stores compressed data.
Definition: packet.h:332
uint32_t av_timecode_get_smpte_from_framenum(const AVTimecode *tc, int framenum)
Convert frame number to SMPTE 12M binary representation.
Definition: timecode.c:55