FFmpeg
gxfenc.c
Go to the documentation of this file.
1 /*
2  * GXF muxer.
3  * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/avassert.h"
23 #include "libavutil/intfloat.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/mathematics.h"
26 #include "libavutil/timecode.h"
27 #include "avformat.h"
28 #include "internal.h"
29 #include "gxf.h"
30 
31 #define GXF_SAMPLES_PER_FRAME 32768
32 #define GXF_AUDIO_PACKET_SIZE 65536
33 
34 #define GXF_TIMECODE(c, d, h, m, s, f) \
35  ((c) << 30 | (d) << 29 | (h) << 24 | (m) << 16 | (s) << 8 | (f))
36 
37 typedef struct GXFTimecode{
38  int hh;
39  int mm;
40  int ss;
41  int ff;
42  int color;
43  int drop;
44 } GXFTimecode;
45 
46 typedef struct GXFStreamContext {
47  int64_t pkt_cnt;
48  uint32_t track_type;
49  uint32_t sample_size;
50  uint32_t sample_rate;
51  uint16_t media_type;
52  uint16_t media_info;
55  int fields;
56  int iframes;
57  int pframes;
58  int bframes;
59  int p_per_gop;
60  int b_per_i_or_p; ///< number of B-frames per I-frame or P-frame
62  unsigned order; ///< interleaving order
64 
65 typedef struct GXFContext {
67  uint32_t nb_fields;
68  uint16_t audio_tracks;
69  uint16_t mpeg_tracks;
70  int64_t creation_time;
71  uint32_t umf_start_offset;
72  uint32_t umf_track_offset;
73  uint32_t umf_media_offset;
74  uint32_t umf_length;
75  uint16_t umf_track_size;
76  uint16_t umf_media_size;
78  int flags;
80  unsigned *flt_entries; ///< offsets of packets /1024, starts after 2nd video field
81  unsigned flt_entries_nb;
82  uint64_t *map_offsets; ///< offset of map packets
83  unsigned map_offsets_nb;
84  unsigned packet_count;
86 } GXFContext;
87 
88 static const struct {
89  int height, index;
90 } gxf_lines_tab[] = {
91  { 480, 1 }, /* NTSC */
92  { 512, 1 }, /* NTSC + VBI */
93  { 576, 2 }, /* PAL */
94  { 608, 2 }, /* PAL + VBI */
95  { 1080, 4 },
96  { 720, 6 },
97 };
98 
99 static const AVCodecTag gxf_media_types[] = {
100  { AV_CODEC_ID_MJPEG , 3 }, /* NTSC */
101  { AV_CODEC_ID_MJPEG , 4 }, /* PAL */
102  { AV_CODEC_ID_PCM_S24LE , 9 },
103  { AV_CODEC_ID_PCM_S16LE , 10 },
104  { AV_CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */
105  { AV_CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */
106  { AV_CODEC_ID_DVVIDEO , 13 }, /* NTSC */
107  { AV_CODEC_ID_DVVIDEO , 14 }, /* PAL */
108  { AV_CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */
109  { AV_CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */
110  { AV_CODEC_ID_AC3 , 17 },
111  //{ AV_CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */
112  { AV_CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */
113  { AV_CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */
114  { AV_CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */
115  { AV_CODEC_ID_NONE, 0 },
116 };
117 
118 #define SERVER_PATH "EXT:/PDR/default/"
119 #define ES_NAME_PATTERN "EXT:/PDR/default/ES."
120 
122 {
123  GXFStreamContext *sc = st->priv_data;
124  int i;
125 
126  for (i = 0; i < 6; ++i) {
127  if (st->codecpar->height == gxf_lines_tab[i].height) {
128  sc->lines_index = gxf_lines_tab[i].index;
129  return 0;
130  }
131  }
132  return -1;
133 }
134 
135 static void gxf_write_padding(AVIOContext *pb, int64_t to_pad)
136 {
137  for (; to_pad > 0; to_pad--) {
138  avio_w8(pb, 0);
139  }
140 }
141 
142 static int64_t updatePacketSize(AVIOContext *pb, int64_t pos)
143 {
144  int64_t curpos;
145  int size;
146 
147  size = avio_tell(pb) - pos;
148  if (size % 4) {
149  gxf_write_padding(pb, 4 - size % 4);
150  size = avio_tell(pb) - pos;
151  }
152  curpos = avio_tell(pb);
153  avio_seek(pb, pos + 6, SEEK_SET);
154  avio_wb32(pb, size);
155  avio_seek(pb, curpos, SEEK_SET);
156  return curpos - pos;
157 }
158 
159 static int64_t updateSize(AVIOContext *pb, int64_t pos)
160 {
161  int64_t curpos;
162 
163  curpos = avio_tell(pb);
164  avio_seek(pb, pos, SEEK_SET);
165  avio_wb16(pb, curpos - pos - 2);
166  avio_seek(pb, curpos, SEEK_SET);
167  return curpos - pos;
168 }
169 
171 {
172  avio_wb32(pb, 0); /* packet leader for synchro */
173  avio_w8(pb, 1);
174  avio_w8(pb, type); /* map packet */
175  avio_wb32(pb, 0); /* size */
176  avio_wb32(pb, 0); /* reserved */
177  avio_w8(pb, 0xE1); /* trailer 1 */
178  avio_w8(pb, 0xE2); /* trailer 2 */
179 }
180 
182 {
183  GXFStreamContext *sc = st->priv_data;
184  char buffer[1024];
185  int size, starting_line;
186 
187  if (sc->iframes) {
188  sc->p_per_gop = sc->pframes / sc->iframes;
189  if (sc->pframes % sc->iframes)
190  sc->p_per_gop++;
191  if (sc->pframes) {
192  sc->b_per_i_or_p = sc->bframes / sc->pframes;
193  if (sc->bframes % sc->pframes)
194  sc->b_per_i_or_p++;
195  }
196  if (sc->p_per_gop > 9)
197  sc->p_per_gop = 9; /* ensure value won't take more than one char */
198  if (sc->b_per_i_or_p > 9)
199  sc->b_per_i_or_p = 9; /* ensure value won't take more than one char */
200  }
201  if (st->codecpar->height == 512 || st->codecpar->height == 608)
202  starting_line = 7; // VBI
203  else if (st->codecpar->height == 480)
204  starting_line = 20;
205  else
206  starting_line = 23; // default PAL
207 
208  size = snprintf(buffer, sizeof(buffer), "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
209  "Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n",
210  (float)st->codecpar->bit_rate, sc->p_per_gop, sc->b_per_i_or_p,
211  st->codecpar->format == AV_PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
212  starting_line, (st->codecpar->height + 15) / 16);
213  av_assert0(size < sizeof(buffer));
214  avio_w8(pb, TRACK_MPG_AUX);
215  avio_w8(pb, size + 1);
216  avio_write(pb, (uint8_t *)buffer, size + 1);
217  return size + 3;
218 }
219 
221 {
222  int64_t track_aux_data = 0;
223 
224  avio_w8(pb, TRACK_AUX);
225  avio_w8(pb, 8);
226  if (st->codecpar->format == AV_PIX_FMT_YUV420P)
227  track_aux_data |= 0x01; /* marks stream as DVCAM instead of DVPRO */
228  track_aux_data |= 0x40000000; /* aux data is valid */
229  avio_wl64(pb, track_aux_data);
230  return 8;
231 }
232 
234 {
235  uint32_t timecode = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
236  gxf->tc.hh, gxf->tc.mm,
237  gxf->tc.ss, gxf->tc.ff);
238 
239  avio_w8(pb, TRACK_AUX);
240  avio_w8(pb, 8);
241  avio_wl32(pb, timecode);
242  /* reserved */
243  avio_wl32(pb, 0);
244  return 8;
245 }
246 
248 {
249  GXFContext *gxf = s->priv_data;
250  AVIOContext *pb = s->pb;
251  int64_t pos;
252 
253  /* track description section */
254  avio_w8(pb, sc->media_type + 0x80);
255  avio_w8(pb, index + 0xC0);
256 
257  pos = avio_tell(pb);
258  avio_wb16(pb, 0); /* size */
259 
260  /* media file name */
261  avio_w8(pb, TRACK_NAME);
262  avio_w8(pb, strlen(ES_NAME_PATTERN) + 3);
263  avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1);
264  avio_wb16(pb, sc->media_info);
265  avio_w8(pb, 0);
266 
267  switch (sc->track_type) {
268  case 3: /* timecode */
270  break;
271  case 4: /* MPEG2 */
272  case 9: /* MPEG1 */
273  gxf_write_mpeg_auxiliary(pb, s->streams[index]);
274  break;
275  case 5: /* DV25 */
276  case 6: /* DV50 */
277  gxf_write_dv_auxiliary(pb, s->streams[index]);
278  break;
279  default:
280  avio_w8(pb, TRACK_AUX);
281  avio_w8(pb, 8);
282  avio_wl64(pb, 0);
283  }
284 
285  /* file system version */
286  avio_w8(pb, TRACK_VER);
287  avio_w8(pb, 4);
288  avio_wb32(pb, 0);
289 
290  /* frame rate */
291  avio_w8(pb, TRACK_FPS);
292  avio_w8(pb, 4);
293  avio_wb32(pb, sc->frame_rate_index);
294 
295  /* lines per frame */
296  avio_w8(pb, TRACK_LINES);
297  avio_w8(pb, 4);
298  avio_wb32(pb, sc->lines_index);
299 
300  /* fields per frame */
301  avio_w8(pb, TRACK_FPF);
302  avio_w8(pb, 4);
303  avio_wb32(pb, sc->fields);
304 
305  return updateSize(pb, pos);
306 }
307 
309 {
310  GXFContext *gxf = s->priv_data;
311  AVIOContext *pb = s->pb;
312  int64_t pos;
313  int len;
314  const char *filename = strrchr(s->url, '/');
315 
316  pos = avio_tell(pb);
317  avio_wb16(pb, 0); /* size */
318 
319  /* name */
320  if (filename)
321  filename++;
322  else
323  filename = s->url;
324  len = strlen(filename);
325 
326  avio_w8(pb, MAT_NAME);
327  avio_w8(pb, strlen(SERVER_PATH) + len + 1);
328  avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1);
329  avio_write(pb, filename, len);
330  avio_w8(pb, 0);
331 
332  /* first field */
334  avio_w8(pb, 4);
335  avio_wb32(pb, 0);
336 
337  /* last field */
338  avio_w8(pb, MAT_LAST_FIELD);
339  avio_w8(pb, 4);
340  avio_wb32(pb, gxf->nb_fields);
341 
342  /* reserved */
343  avio_w8(pb, MAT_MARK_IN);
344  avio_w8(pb, 4);
345  avio_wb32(pb, 0);
346 
347  avio_w8(pb, MAT_MARK_OUT);
348  avio_w8(pb, 4);
349  avio_wb32(pb, gxf->nb_fields);
350 
351  /* estimated size */
352  avio_w8(pb, MAT_SIZE);
353  avio_w8(pb, 4);
354  avio_wb32(pb, avio_size(pb) / 1024);
355 
356  return updateSize(pb, pos);
357 }
358 
360 {
361  GXFContext *gxf = s->priv_data;
362  AVIOContext *pb = s->pb;
363  int64_t pos;
364  int i;
365 
366  pos = avio_tell(pb);
367  avio_wb16(pb, 0); /* size */
368  for (i = 0; i < s->nb_streams; ++i)
370 
372 
373  return updateSize(pb, pos);
374 }
375 
376 static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
377 {
378  GXFContext *gxf = s->priv_data;
379  AVIOContext *pb = s->pb;
380  int64_t pos = avio_tell(pb);
381 
382  if (!rewrite) {
383  if (!(gxf->map_offsets_nb % 30)) {
384  int err;
385  if ((err = av_reallocp_array(&gxf->map_offsets,
386  gxf->map_offsets_nb + 30,
387  sizeof(*gxf->map_offsets))) < 0) {
388  gxf->map_offsets_nb = 0;
389  av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n");
390  return err;
391  }
392  }
393  gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here
394  }
395 
397 
398  /* preamble */
399  avio_w8(pb, 0xE0); /* version */
400  avio_w8(pb, 0xFF); /* reserved */
401 
404 
405  return updatePacketSize(pb, pos);
406 }
407 
409 {
410  GXFContext *gxf = s->priv_data;
411  AVIOContext *pb = s->pb;
412  int64_t pos = avio_tell(pb);
413  int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1;
414  int flt_entries = gxf->nb_fields / fields_per_flt;
415  int i = 0;
416 
418 
419  avio_wl32(pb, fields_per_flt); /* number of fields */
420  avio_wl32(pb, flt_entries); /* number of active flt entries */
421 
422  if (gxf->flt_entries) {
423  for (i = 0; i < flt_entries; i++)
424  avio_wl32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]);
425  }
426 
427  for (; i < 1000; i++)
428  avio_wl32(pb, 0);
429 
430  return updatePacketSize(pb, pos);
431 }
432 
434 {
435  GXFContext *gxf = s->priv_data;
436  AVIOContext *pb = s->pb;
437  int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
438  int64_t timestamp = 0;
439  uint64_t nb_fields;
440  uint32_t timecode_in; // timecode at mark in
441  uint32_t timecode_out; // timecode at mark out
442 
443  ff_parse_creation_time_metadata(s, &timestamp, 1);
444 
445  timecode_in = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
446  gxf->tc.hh, gxf->tc.mm,
447  gxf->tc.ss, gxf->tc.ff);
448 
449  nb_fields = gxf->nb_fields +
450  gxf->tc.hh * (timecode_base * 3600) +
451  gxf->tc.mm * (timecode_base * 60) +
452  gxf->tc.ss * timecode_base +
453  gxf->tc.ff;
454 
455  timecode_out = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
456  nb_fields / (timecode_base * 3600) % 24,
457  nb_fields / (timecode_base * 60) % 60,
458  nb_fields / timecode_base % 60,
459  nb_fields % timecode_base);
460 
461  avio_wl32(pb, gxf->flags);
462  avio_wl32(pb, gxf->nb_fields); /* length of the longest track */
463  avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */
464  avio_wl32(pb, 0); /* mark in */
465  avio_wl32(pb, gxf->nb_fields); /* mark out */
466  avio_wl32(pb, timecode_in); /* timecode mark in */
467  avio_wl32(pb, timecode_out); /* timecode mark out */
468  avio_wl64(pb, timestamp); /* modification time */
469  avio_wl64(pb, timestamp); /* creation time */
470  avio_wl16(pb, 0); /* reserved */
471  avio_wl16(pb, 0); /* reserved */
472  avio_wl16(pb, gxf->audio_tracks);
473  avio_wl16(pb, 1); /* timecode track count */
474  avio_wl16(pb, 0); /* reserved */
475  avio_wl16(pb, gxf->mpeg_tracks);
476  return 48;
477 }
478 
480 {
481  GXFContext *gxf = s->priv_data;
482  AVIOContext *pb = s->pb;
483 
484  avio_wl32(pb, gxf->umf_length); /* total length of the umf data */
485  avio_wl32(pb, 3); /* version */
486  avio_wl32(pb, s->nb_streams+1);
487  avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */
488  avio_wl32(pb, gxf->umf_track_size);
489  avio_wl32(pb, s->nb_streams+1);
490  avio_wl32(pb, gxf->umf_media_offset);
491  avio_wl32(pb, gxf->umf_media_size);
492  avio_wl32(pb, gxf->umf_length); /* user data offset */
493  avio_wl32(pb, 0); /* user data size */
494  avio_wl32(pb, 0); /* reserved */
495  avio_wl32(pb, 0); /* reserved */
496  return 48;
497 }
498 
500 {
501  AVIOContext *pb = s->pb;
502  GXFContext *gxf = s->priv_data;
503  int64_t pos = avio_tell(pb);
504  int i;
505 
506  gxf->umf_track_offset = pos - gxf->umf_start_offset;
507  for (i = 0; i < s->nb_streams; ++i) {
508  GXFStreamContext *sc = s->streams[i]->priv_data;
509  avio_wl16(pb, sc->media_info);
510  avio_wl16(pb, 1);
511  }
512 
514  avio_wl16(pb, 1);
515 
516  return avio_tell(pb) - pos;
517 }
518 
520 {
521  GXFStreamContext *sc = st->priv_data;
522 
523  if (st->codecpar->format == AV_PIX_FMT_YUV422P)
524  avio_wl32(pb, 2);
525  else
526  avio_wl32(pb, 1); /* default to 420 */
527  avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
528  avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
529  avio_wl32(pb, 1); /* I picture per GOP */
530  avio_wl32(pb, sc->p_per_gop);
531  avio_wl32(pb, sc->b_per_i_or_p);
533  avio_wl32(pb, 2);
534  else if (st->codecpar->codec_id == AV_CODEC_ID_MPEG1VIDEO)
535  avio_wl32(pb, 1);
536  else
537  avio_wl32(pb, 0);
538  avio_wl32(pb, 0); /* reserved */
539  return 32;
540 }
541 
543 {
544  avio_wl32(pb, drop); /* drop frame */
545  avio_wl32(pb, 0); /* reserved */
546  avio_wl32(pb, 0); /* reserved */
547  avio_wl32(pb, 0); /* reserved */
548  avio_wl32(pb, 0); /* reserved */
549  avio_wl32(pb, 0); /* reserved */
550  avio_wl32(pb, 0); /* reserved */
551  avio_wl32(pb, 0); /* reserved */
552  return 32;
553 }
554 
556 {
557  int dv_umf_data = 0;
558 
559  if (st->codecpar->format == AV_PIX_FMT_YUV420P)
560  dv_umf_data |= 0x20; /* marks as DVCAM instead of DVPRO */
561  avio_wl32(pb, dv_umf_data);
562  avio_wl32(pb, 0);
563  avio_wl32(pb, 0);
564  avio_wl32(pb, 0);
565  avio_wl32(pb, 0);
566  avio_wl32(pb, 0);
567  avio_wl32(pb, 0);
568  avio_wl32(pb, 0);
569  return 32;
570 }
571 
573 {
574  avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
575  avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
576  avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */
577  avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */
578  avio_wl32(pb, 0); /* reserved */
579  avio_wl32(pb, 0); /* reserved */
580  return 32;
581 }
582 
584 {
585  GXFContext *gxf = s->priv_data;
586  AVIOContext *pb = s->pb;
587  int64_t pos;
588  int i, j;
589 
590  pos = avio_tell(pb);
591  gxf->umf_media_offset = pos - gxf->umf_start_offset;
592  for (i = 0; i <= s->nb_streams; ++i) {
593  GXFStreamContext *sc;
594  int64_t startpos, curpos;
595 
596  if (i == s->nb_streams)
597  sc = &gxf->timecode_track;
598  else
599  sc = s->streams[i]->priv_data;
600 
601  startpos = avio_tell(pb);
602  avio_wl16(pb, 0); /* length */
603  avio_wl16(pb, sc->media_info);
604  avio_wl16(pb, 0); /* reserved */
605  avio_wl16(pb, 0); /* reserved */
606  avio_wl32(pb, gxf->nb_fields);
607  avio_wl32(pb, 0); /* attributes rw, ro */
608  avio_wl32(pb, 0); /* mark in */
609  avio_wl32(pb, gxf->nb_fields); /* mark out */
611  avio_wb16(pb, sc->media_info);
612  for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++)
613  avio_w8(pb, 0);
614  avio_wl32(pb, sc->track_type);
615  avio_wl32(pb, sc->sample_rate);
616  avio_wl32(pb, sc->sample_size);
617  avio_wl32(pb, 0); /* reserved */
618 
619  if (sc == &gxf->timecode_track)
621  else {
622  AVStream *st = s->streams[i];
623  switch (st->codecpar->codec_id) {
626  gxf_write_umf_media_mpeg(pb, st);
627  break;
630  break;
631  case AV_CODEC_ID_DVVIDEO:
632  gxf_write_umf_media_dv(pb, sc, st);
633  break;
634  }
635  }
636 
637  curpos = avio_tell(pb);
638  avio_seek(pb, startpos, SEEK_SET);
639  avio_wl16(pb, curpos - startpos);
640  avio_seek(pb, curpos, SEEK_SET);
641  }
642  return avio_tell(pb) - pos;
643 }
644 
646 {
647  GXFContext *gxf = s->priv_data;
648  AVIOContext *pb = s->pb;
649  int64_t pos = avio_tell(pb);
650 
652 
653  /* preamble */
654  avio_w8(pb, 3); /* first and last (only) packet */
655  avio_wb32(pb, gxf->umf_length); /* data length */
656 
657  gxf->umf_start_offset = avio_tell(pb);
662  gxf->umf_length = avio_tell(pb) - gxf->umf_start_offset;
663  return updatePacketSize(pb, pos);
664 }
665 
667 {
668  if (!vsc)
669  return;
670 
671  sc->media_type = vsc->sample_rate == 60 ? 7 : 8;
672  sc->sample_rate = vsc->sample_rate;
673  sc->media_info = ('T'<<8) | '0';
674  sc->track_type = 3;
676  sc->lines_index = vsc->lines_index;
677  sc->sample_size = 16;
678  sc->fields = vsc->fields;
679 }
680 
681 static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields)
682 {
683  char c;
684 
685  if (sscanf(tcstr, "%d:%d:%d%c%d", &tc->hh, &tc->mm, &tc->ss, &c, &tc->ff) != 5) {
686  av_log(s, AV_LOG_ERROR, "unable to parse timecode, "
687  "syntax: hh:mm:ss[:;.]ff\n");
688  return -1;
689  }
690 
691  tc->color = 0;
692  tc->drop = c != ':';
693 
694  if (fields == 2)
695  tc->ff = tc->ff * 2;
696 
697  return 0;
698 }
699 
701 {
702  AVIOContext *pb = s->pb;
703  GXFContext *gxf = s->priv_data;
704  GXFStreamContext *vsc = NULL;
705  uint8_t tracks[255] = {0};
706  int i, media_info = 0;
707  int ret;
708  AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
709 
710  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
711  av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome\n");
712  return -1;
713  }
714 
715  gxf->flags |= 0x00080000; /* material is simple clip */
716  for (i = 0; i < s->nb_streams; ++i) {
717  AVStream *st = s->streams[i];
718  GXFStreamContext *sc = av_mallocz(sizeof(*sc));
719  if (!sc)
720  return AVERROR(ENOMEM);
721  st->priv_data = sc;
722 
723  sc->media_type = ff_codec_get_tag(gxf_media_types, st->codecpar->codec_id);
724  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
726  av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
727  return -1;
728  }
729  if (st->codecpar->sample_rate != 48000) {
730  av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
731  return -1;
732  }
733  if (st->codecpar->channels != 1) {
734  av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
735  return -1;
736  }
738  if (ret < 0)
739  return ret;
740  sc->track_type = 2;
741  sc->sample_rate = st->codecpar->sample_rate;
742  avpriv_set_pts_info(st, 64, 1, sc->sample_rate);
743  sc->sample_size = 16;
744  sc->frame_rate_index = -2;
745  sc->lines_index = -2;
746  sc->fields = -2;
747  gxf->audio_tracks++;
748  gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
749  media_info = 'A';
750  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
751  if (i != 0) {
752  av_log(s, AV_LOG_ERROR, "video stream must be the first track\n");
753  return -1;
754  }
755  /* FIXME check from time_base ? */
756  if (st->codecpar->height == 480 || st->codecpar->height == 512) { /* NTSC or NTSC+VBI */
757  sc->frame_rate_index = 5;
758  sc->sample_rate = 60;
759  gxf->flags |= 0x00000080;
760  gxf->time_base = (AVRational){ 1001, 60000 };
761  } else if (st->codecpar->height == 576 || st->codecpar->height == 608) { /* PAL or PAL+VBI */
762  sc->frame_rate_index = 6;
763  sc->media_type++;
764  sc->sample_rate = 50;
765  gxf->flags |= 0x00000040;
766  gxf->time_base = (AVRational){ 1, 50 };
767  } else {
768  av_log(s, AV_LOG_ERROR, "unsupported video resolution, "
769  "gxf muxer only accepts PAL or NTSC resolutions currently\n");
770  return -1;
771  }
772  if (!tcr)
773  tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
774  avpriv_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den);
775  if (gxf_find_lines_index(st) < 0)
776  sc->lines_index = -1;
777  sc->sample_size = st->codecpar->bit_rate;
778  sc->fields = 2; /* interlaced */
779 
780  vsc = sc;
781 
782  switch (st->codecpar->codec_id) {
783  case AV_CODEC_ID_MJPEG:
784  sc->track_type = 1;
785  gxf->flags |= 0x00004000;
786  media_info = 'J';
787  break;
789  sc->track_type = 9;
790  gxf->mpeg_tracks++;
791  media_info = 'L';
792  break;
794  sc->first_gop_closed = -1;
795  sc->track_type = 4;
796  gxf->mpeg_tracks++;
797  gxf->flags |= 0x00008000;
798  media_info = 'M';
799  break;
800  case AV_CODEC_ID_DVVIDEO:
801  if (st->codecpar->format == AV_PIX_FMT_YUV422P) {
802  sc->media_type += 2;
803  sc->track_type = 6;
804  gxf->flags |= 0x00002000;
805  media_info = 'E';
806  } else {
807  sc->track_type = 5;
808  gxf->flags |= 0x00001000;
809  media_info = 'D';
810  }
811  break;
812  default:
813  av_log(s, AV_LOG_ERROR, "video codec not supported\n");
814  return -1;
815  }
816  }
817  /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
818  sc->media_info = media_info<<8 | ('0'+tracks[media_info]++);
819  sc->order = s->nb_streams - st->index;
820  }
821 
822  if (tcr && vsc)
823  gxf_init_timecode(s, &gxf->tc, tcr->value, vsc->fields);
824 
826  gxf->flags |= 0x200000; // time code track is non-drop frame
827 
828  if ((ret = gxf_write_map_packet(s, 0)) < 0)
829  return ret;
832 
833  gxf->packet_count = 3;
834 
835  return 0;
836 }
837 
839 {
840  int64_t pos = avio_tell(pb);
841 
843  return updatePacketSize(pb, pos);
844 }
845 
847 {
848  GXFContext *gxf = s->priv_data;
849  AVIOContext *pb = s->pb;
850  int64_t end;
851  int i;
852  int ret;
853 
855  end = avio_tell(pb);
856  avio_seek(pb, 0, SEEK_SET);
857  /* overwrite map, flt and umf packets with new values */
858  if ((ret = gxf_write_map_packet(s, 1)) < 0)
859  return ret;
862  /* update duration in all map packets */
863  for (i = 1; i < gxf->map_offsets_nb; i++) {
864  avio_seek(pb, gxf->map_offsets[i], SEEK_SET);
865  if ((ret = gxf_write_map_packet(s, 1)) < 0)
866  return ret;
867  }
868 
869  avio_seek(pb, end, SEEK_SET);
870 
871  return 0;
872 }
873 
875 {
876  GXFContext *gxf = s->priv_data;
877 
878  av_freep(&gxf->flt_entries);
879  av_freep(&gxf->map_offsets);
880 }
881 
882 static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
883 {
884  uint32_t c=-1;
885  int i;
886  for(i=0; i<size-4 && c!=0x100; i++){
887  c = (c<<8) + buf[i];
888  if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
889  sc->first_gop_closed= (buf[i+4]>>6)&1;
890  }
891  return (buf[i+1]>>3)&7;
892 }
893 
895 {
896  GXFContext *gxf = s->priv_data;
897  AVIOContext *pb = s->pb;
898  AVStream *st = s->streams[pkt->stream_index];
899  GXFStreamContext *sc = st->priv_data;
900  unsigned field_nb;
901  /* If the video is frame-encoded, the frame numbers shall be represented by
902  * even field numbers.
903  * see SMPTE360M-2004 6.4.2.1.3 Media field number */
904  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
905  field_nb = gxf->nb_fields;
906  } else {
907  field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
908  (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
909  }
910 
911  avio_w8(pb, sc->media_type);
912  avio_w8(pb, st->index);
913  avio_wb32(pb, field_nb);
914  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
915  avio_wb16(pb, 0);
916  avio_wb16(pb, size / 2);
917  } else if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
918  int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
919  if (frame_type == AV_PICTURE_TYPE_I) {
920  avio_w8(pb, 0x0d);
921  sc->iframes++;
922  } else if (frame_type == AV_PICTURE_TYPE_B) {
923  avio_w8(pb, 0x0f);
924  sc->bframes++;
925  } else {
926  avio_w8(pb, 0x0e);
927  sc->pframes++;
928  }
929  avio_wb24(pb, size);
930  } else if (st->codecpar->codec_id == AV_CODEC_ID_DVVIDEO) {
931  avio_w8(pb, size / 4096);
932  avio_wb24(pb, 0);
933  } else
934  avio_wb32(pb, size);
935  avio_wb32(pb, field_nb);
936  avio_w8(pb, 1); /* flags */
937  avio_w8(pb, 0); /* reserved */
938  return 16;
939 }
940 
942 {
943  GXFContext *gxf = s->priv_data;
944  AVIOContext *pb = s->pb;
945  AVStream *st = s->streams[pkt->stream_index];
946  int64_t pos = avio_tell(pb);
947  int padding = 0;
948  unsigned packet_start_offset = avio_tell(pb) / 1024;
949  int ret;
950 
952  if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
953  padding = 4 - pkt->size % 4;
954  else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
955  padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
956  gxf_write_media_preamble(s, pkt, pkt->size + padding);
957  avio_write(pb, pkt->data, pkt->size);
958  gxf_write_padding(pb, padding);
959 
960  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
961  if (!(gxf->flt_entries_nb % 500)) {
962  int err;
963  if ((err = av_reallocp_array(&gxf->flt_entries,
964  gxf->flt_entries_nb + 500,
965  sizeof(*gxf->flt_entries))) < 0) {
966  gxf->flt_entries_nb = 0;
967  gxf->nb_fields = 0;
968  av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
969  return err;
970  }
971  }
972  gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset;
973  gxf->nb_fields += 2; // count fields
974  }
975 
976  updatePacketSize(pb, pos);
977 
978  gxf->packet_count++;
979  if (gxf->packet_count == 100) {
980  if ((ret = gxf_write_map_packet(s, 0)) < 0)
981  return ret;
982  gxf->packet_count = 0;
983  }
984 
985  return 0;
986 }
987 
989  const AVPacket *cur)
990 {
991  GXFContext *gxf = s->priv_data;
992  const AVPacket *pkt[2] = { cur, next };
993  int i, field_nb[2];
994  GXFStreamContext *sc[2];
995 
996  for (i = 0; i < 2; i++) {
997  AVStream *st = s->streams[pkt[i]->stream_index];
998  sc[i] = st->priv_data;
999  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
1000  field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den,
1001  (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
1002  field_nb[i] &= ~1; // compare against even field number because audio must be before video
1003  } else
1004  field_nb[i] = pkt[i]->dts; // dts are field based
1005  }
1006 
1007  return field_nb[1] > field_nb[0] ||
1008  (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order);
1009 }
1010 
1012 {
1013  int ret;
1014  if (pkt) {
1015  AVStream *st = s->streams[pkt->stream_index];
1016  GXFStreamContext *sc = st->priv_data;
1018  pkt->pts = pkt->dts = sc->pkt_cnt * 2; // enforce 2 fields
1019  else
1020  pkt->pts = pkt->dts = sc->pkt_cnt * GXF_SAMPLES_PER_FRAME;
1021  sc->pkt_cnt++;
1022  if ((ret = ff_interleave_add_packet(s, pkt, gxf_compare_field_nb)) < 0)
1023  return ret;
1024  }
1025  return ff_interleave_packet_per_dts(s, out, NULL, flush);
1026 }
1027 
1029  .name = "gxf",
1030  .long_name = NULL_IF_CONFIG_SMALL("GXF (General eXchange Format)"),
1031  .extensions = "gxf",
1032  .priv_data_size = sizeof(GXFContext),
1033  .audio_codec = AV_CODEC_ID_PCM_S16LE,
1034  .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1038  .deinit = gxf_deinit,
1040 };
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:702
unsigned packet_count
Definition: gxfenc.c:84
#define NULL
Definition: coverity.c:32
GXFPktType
Definition: gxf.h:25
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:459
Bytestream IO Context.
Definition: avio.h:161
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:346
static int gxf_write_header(AVFormatContext *s)
Definition: gxfenc.c:700
AVRational time_base
Definition: gxfenc.c:77
int mm
Definition: gxfenc.c:39
static void flush(AVCodecContext *avctx)
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:4869
static int gxf_write_dv_auxiliary(AVIOContext *pb, AVStream *st)
Definition: gxfenc.c:220
static int64_t updatePacketSize(AVIOContext *pb, int64_t pos)
Definition: gxfenc.c:142
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
Definition: gxfenc.c:519
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: packet.h:364
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
static const AVCodecTag gxf_media_types[]
Definition: gxfenc.c:99
Definition: gxf.h:29
#define tc
Definition: regdef.h:69
static av_always_inline uint64_t av_double2int(double f)
Reinterpret a double as a 64-bit integer.
Definition: intfloat.h:70
GLint GLenum type
Definition: opengl_enc.c:104
void * priv_data
Definition: avformat.h:891
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:3086
int b_per_i_or_p
number of B-frames per I-frame or P-frame
Definition: gxfenc.c:60
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
static AVPacket pkt
GXFStreamContext timecode_track
Definition: gxfenc.c:79
Definition: gxf.h:43
unsigned map_offsets_nb
Definition: gxfenc.c:83
uint32_t umf_start_offset
Definition: gxfenc.c:71
frame_type
int ss
Definition: gxfenc.c:40
Definition: gxf.h:39
Definition: gxf.h:34
Format I/O context.
Definition: avformat.h:1351
uint32_t umf_length
Definition: gxfenc.c:74
AVOutputFormat ff_gxf_muxer
Definition: gxfenc.c:1028
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
unsigned flt_entries_nb
Definition: gxfenc.c:81
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:379
uint8_t
Round toward +infinity.
Definition: mathematics.h:83
int hh
Definition: gxfenc.c:38
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
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
uint32_t umf_track_offset
Definition: gxfenc.c:72
Definition: gxf.h:49
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
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
uint8_t * data
Definition: packet.h:363
int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
Interleave an AVPacket per dts so it can be muxed.
Definition: mux.c:914
static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
Definition: gxfenc.c:666
ptrdiff_t size
Definition: opengl_enc.c:100
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:225
static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)
Interleave an AVPacket correctly so it can be muxed.
Definition: mux.c:1067
static int gxf_find_lines_index(AVStream *st)
Definition: gxfenc.c:121
#define av_log(a,...)
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:447
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:5628
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1591
AVClass * av_class
Definition: gxfenc.c:66
static int64_t updateSize(AVIOContext *pb, int64_t pos)
Definition: gxfenc.c:159
Definition: gxf.h:44
uint16_t umf_track_size
Definition: gxfenc.c:75
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
char * url
input or output URL.
Definition: avformat.h:1447
static void gxf_write_padding(AVIOContext *pb, int64_t to_pad)
Definition: gxfenc.c:135
static const struct @261 gxf_lines_tab[]
unsigned int pos
Definition: spdifenc.c:410
uint32_t sample_size
Definition: gxfenc.c:49
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
uint32_t umf_media_offset
Definition: gxfenc.c:73
static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
Definition: gxfenc.c:572
simple assert() macros that are a bit more flexible than ISO C assert().
int first_gop_closed
Definition: gxfenc.c:61
Definition: gxf.h:27
GXFTimecode tc
Definition: gxfenc.c:85
static int gxf_write_umf_payload(AVFormatContext *s)
Definition: gxfenc.c:479
static int gxf_write_umf_material_description(AVFormatContext *s)
Definition: gxfenc.c:433
Definition: gxf.h:28
uint32_t nb_fields
Definition: gxfenc.c:67
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate, or free an array through a pointer to a pointer.
Definition: mem.c:206
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
Definition: gxfenc.c:894
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
Definition: gxfenc.c:882
static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
Definition: gxfenc.c:1011
the definition of that something depends on the semantic of the filter The callback must examine the status of the filter s links and proceed accordingly The status of output links is stored in the status_in and status_out fields and tested by the then the processing requires a frame on this link and the filter is expected to make efforts in that direction The status of input links is stored by the fifo and status_out fields
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:98
void avio_wb24(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:477
const char * name
Definition: avformat.h:500
int64_t creation_time
Definition: gxfenc.c:70
#define s(width, name)
Definition: cbs_vp9.c:257
#define GXF_AUDIO_PACKET_SIZE
Definition: gxfenc.c:32
static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields)
Definition: gxfenc.c:681
AVDictionary * metadata
Definition: avformat.h:940
static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
Definition: gxfenc.c:376
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
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:51
unsigned order
interleaving order
Definition: gxfenc.c:62
#define ES_NAME_PATTERN
Definition: gxfenc.c:119
Stream structure.
Definition: avformat.h:876
int color
Definition: gxfenc.c:42
static int gxf_write_material_data_section(AVFormatContext *s)
Definition: gxfenc.c:308
unsigned * flt_entries
offsets of packets /1024, starts after 2nd video field
Definition: gxfenc.c:80
#define GXF_SAMPLES_PER_FRAME
Definition: gxfenc.c:31
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
uint16_t media_info
Definition: gxfenc.c:52
Timecode helpers header.
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
int frame_rate_index
Definition: gxfenc.c:53
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:203
static int gxf_write_track_description_section(AVFormatContext *s)
Definition: gxfenc.c:359
#define GXF_TIMECODE(c, d, h, m, s, f)
Definition: gxfenc.c:34
int drop
Definition: gxfenc.c:43
#define AV_STRINGIFY(s)
Definition: macros.h:36
Describe the class of an AVClass context structure.
Definition: log.h:67
int index
Definition: gxfenc.c:89
static int gxf_write_eos_packet(AVIOContext *pb)
Definition: gxfenc.c:838
Rational number (pair of numerator and denominator).
Definition: rational.h:58
Definition: gxf.h:45
static int gxf_write_trailer(AVFormatContext *s)
Definition: gxfenc.c:846
Definition: gxf.h:26
#define snprintf
Definition: snprintf.h:34
static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFContext *gxf)
Definition: gxfenc.c:233
static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
Definition: gxfenc.c:247
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:465
uint16_t umf_media_size
Definition: gxfenc.c:76
int height
Definition: gxfenc.c:89
static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type)
Definition: gxfenc.c:170
int sample_rate
Audio only.
Definition: codec_par.h:170
#define SERVER_PATH
Definition: gxfenc.c:118
Main libavformat public API header.
static int gxf_write_flt_packet(AVFormatContext *s)
Definition: gxfenc.c:408
static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop)
Definition: gxfenc.c:542
static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc, AVStream *st)
Definition: gxfenc.c:555
static void gxf_deinit(AVFormatContext *s)
Definition: gxfenc.c:874
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
uint64_t * map_offsets
offset of map packets
Definition: gxfenc.c:82
Bi-dir predicted.
Definition: avutil.h:276
static int gxf_write_umf_track_description(AVFormatContext *s)
Definition: gxfenc.c:499
uint16_t mpeg_tracks
Definition: gxfenc.c:69
int den
Denominator.
Definition: rational.h:60
uint16_t audio_tracks
Definition: gxfenc.c:68
int lines_index
Definition: gxfenc.c:54
Definition: gxf.h:30
char * value
Definition: dict.h:87
int len
int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
Add a bitstream filter to a stream.
Definition: utils.c:5500
void * priv_data
Format private data.
Definition: avformat.h:1379
static int gxf_compare_field_nb(AVFormatContext *s, const AVPacket *next, const AVPacket *cur)
Definition: gxfenc.c:988
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:346
int ff
Definition: gxfenc.c:41
int channels
Audio only.
Definition: codec_par.h:166
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:362
Definition: gxf.h:47
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:387
uint32_t track_type
Definition: gxfenc.c:48
FILE * out
Definition: movenc.c:54
static int gxf_write_umf_packet(AVFormatContext *s)
Definition: gxfenc.c:645
#define av_freep(p)
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
uint16_t media_type
Definition: gxfenc.c:51
int flags
Definition: gxfenc.c:78
int stream_index
Definition: packet.h:365
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: packet.h:340
uint32_t sample_rate
Definition: gxfenc.c:50
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:356
static int gxf_write_umf_media_description(AVFormatContext *s)
Definition: gxfenc.c:583
int i
Definition: input.c:407
int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, int(*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
Add packet to an AVFormatContext&#39;s packet_buffer list, determining its interleaved position using com...
Definition: mux.c:812
GLuint buffer
Definition: opengl_enc.c:101
int64_t pkt_cnt
Definition: gxfenc.c:47
static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st)
Definition: gxfenc.c:181
static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: gxfenc.c:941