FFmpeg
gxfenc.c
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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/mathematics.h"
25 #include "avformat.h"
26 #include "avio_internal.h"
27 #include "internal.h"
28 #include "gxf.h"
29 #include "mux.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;
53  int frame_rate_index;
54  int lines_index;
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
61  int first_gop_closed;
62  unsigned order; ///< interleaving order
63 } GXFStreamContext;
64 
65 typedef struct GXFContext {
66  AVClass *av_class;
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;
77  AVRational time_base;
78  int flags;
79  GXFStreamContext timecode_track;
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;
85  GXFTimecode tc;
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 
121 static int gxf_find_lines_index(AVStream *st)
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  ffio_fill(pb, 0, to_pad);
138 }
139 
140 static int64_t updatePacketSize(AVIOContext *pb, int64_t pos)
141 {
142  int64_t curpos;
143  int size;
144 
145  size = avio_tell(pb) - pos;
146  if (size % 4) {
147  gxf_write_padding(pb, 4 - size % 4);
148  size = avio_tell(pb) - pos;
149  }
150  curpos = avio_tell(pb);
151  avio_seek(pb, pos + 6, SEEK_SET);
152  avio_wb32(pb, size);
153  avio_seek(pb, curpos, SEEK_SET);
154  return curpos - pos;
155 }
156 
157 static int64_t updateSize(AVIOContext *pb, int64_t pos)
158 {
159  int64_t curpos;
160 
161  curpos = avio_tell(pb);
162  avio_seek(pb, pos, SEEK_SET);
163  avio_wb16(pb, curpos - pos - 2);
164  avio_seek(pb, curpos, SEEK_SET);
165  return curpos - pos;
166 }
167 
168 static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type)
169 {
170  avio_wb32(pb, 0); /* packet leader for synchro */
171  avio_w8(pb, 1);
172  avio_w8(pb, type); /* map packet */
173  avio_wb32(pb, 0); /* size */
174  avio_wb32(pb, 0); /* reserved */
175  avio_w8(pb, 0xE1); /* trailer 1 */
176  avio_w8(pb, 0xE2); /* trailer 2 */
177 }
178 
179 static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st)
180 {
181  GXFStreamContext *sc = st->priv_data;
182  char buffer[1024];
183  int size, starting_line;
184 
185  if (sc->iframes) {
186  sc->p_per_gop = sc->pframes / sc->iframes;
187  if (sc->pframes % sc->iframes)
188  sc->p_per_gop++;
189  if (sc->pframes) {
190  sc->b_per_i_or_p = sc->bframes / sc->pframes;
191  if (sc->bframes % sc->pframes)
192  sc->b_per_i_or_p++;
193  }
194  if (sc->p_per_gop > 9)
195  sc->p_per_gop = 9; /* ensure value won't take more than one char */
196  if (sc->b_per_i_or_p > 9)
197  sc->b_per_i_or_p = 9; /* ensure value won't take more than one char */
198  }
199  if (st->codecpar->height == 512 || st->codecpar->height == 608)
200  starting_line = 7; // VBI
201  else if (st->codecpar->height == 480)
202  starting_line = 20;
203  else
204  starting_line = 23; // default PAL
205 
206  size = snprintf(buffer, sizeof(buffer), "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
207  "Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n",
208  (float)st->codecpar->bit_rate, sc->p_per_gop, sc->b_per_i_or_p,
209  st->codecpar->format == AV_PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
210  starting_line, (st->codecpar->height + 15) / 16);
211  av_assert0(size < sizeof(buffer));
212  avio_w8(pb, TRACK_MPG_AUX);
213  avio_w8(pb, size + 1);
214  avio_write(pb, (uint8_t *)buffer, size + 1);
215  return size + 3;
216 }
217 
218 static int gxf_write_dv_auxiliary(AVIOContext *pb, AVStream *st)
219 {
220  int64_t track_aux_data = 0;
221 
222  avio_w8(pb, TRACK_AUX);
223  avio_w8(pb, 8);
224  if (st->codecpar->format == AV_PIX_FMT_YUV420P)
225  track_aux_data |= 0x01; /* marks stream as DVCAM instead of DVPRO */
226  track_aux_data |= 0x40000000; /* aux data is valid */
227  avio_wl64(pb, track_aux_data);
228  return 8;
229 }
230 
231 static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFContext *gxf)
232 {
233  uint32_t timecode = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
234  gxf->tc.hh, gxf->tc.mm,
235  gxf->tc.ss, gxf->tc.ff);
236 
237  avio_w8(pb, TRACK_AUX);
238  avio_w8(pb, 8);
239  avio_wl32(pb, timecode);
240  /* reserved */
241  avio_wl32(pb, 0);
242  return 8;
243 }
244 
245 static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
246 {
247  GXFContext *gxf = s->priv_data;
248  AVIOContext *pb = s->pb;
249  int64_t pos;
250 
251  /* track description section */
252  avio_w8(pb, sc->media_type + 0x80);
253  avio_w8(pb, index + 0xC0);
254 
255  pos = avio_tell(pb);
256  avio_wb16(pb, 0); /* size */
257 
258  /* media file name */
259  avio_w8(pb, TRACK_NAME);
260  avio_w8(pb, strlen(ES_NAME_PATTERN) + 3);
261  avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1);
262  avio_wb16(pb, sc->media_info);
263  avio_w8(pb, 0);
264 
265  switch (sc->track_type) {
266  case 3: /* timecode */
267  gxf_write_timecode_auxiliary(pb, gxf);
268  break;
269  case 4: /* MPEG2 */
270  case 9: /* MPEG1 */
271  gxf_write_mpeg_auxiliary(pb, s->streams[index]);
272  break;
273  case 5: /* DV25 */
274  case 6: /* DV50 */
275  gxf_write_dv_auxiliary(pb, s->streams[index]);
276  break;
277  default:
278  avio_w8(pb, TRACK_AUX);
279  avio_w8(pb, 8);
280  avio_wl64(pb, 0);
281  }
282 
283  /* file system version */
284  avio_w8(pb, TRACK_VER);
285  avio_w8(pb, 4);
286  avio_wb32(pb, 0);
287 
288  /* frame rate */
289  avio_w8(pb, TRACK_FPS);
290  avio_w8(pb, 4);
291  avio_wb32(pb, sc->frame_rate_index);
292 
293  /* lines per frame */
294  avio_w8(pb, TRACK_LINES);
295  avio_w8(pb, 4);
296  avio_wb32(pb, sc->lines_index);
297 
298  /* fields per frame */
299  avio_w8(pb, TRACK_FPF);
300  avio_w8(pb, 4);
301  avio_wb32(pb, sc->fields);
302 
303  return updateSize(pb, pos);
304 }
305 
306 static int gxf_write_material_data_section(AVFormatContext *s)
307 {
308  GXFContext *gxf = s->priv_data;
309  AVIOContext *pb = s->pb;
310  int64_t pos;
311  int len;
312  const char *filename = strrchr(s->url, '/');
313 
314  pos = avio_tell(pb);
315  avio_wb16(pb, 0); /* size */
316 
317  /* name */
318  if (filename)
319  filename++;
320  else
321  filename = s->url;
322  len = strlen(filename);
323 
324  avio_w8(pb, MAT_NAME);
325  avio_w8(pb, strlen(SERVER_PATH) + len + 1);
326  avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1);
327  avio_write(pb, filename, len);
328  avio_w8(pb, 0);
329 
330  /* first field */
331  avio_w8(pb, MAT_FIRST_FIELD);
332  avio_w8(pb, 4);
333  avio_wb32(pb, 0);
334 
335  /* last field */
336  avio_w8(pb, MAT_LAST_FIELD);
337  avio_w8(pb, 4);
338  avio_wb32(pb, gxf->nb_fields);
339 
340  /* reserved */
341  avio_w8(pb, MAT_MARK_IN);
342  avio_w8(pb, 4);
343  avio_wb32(pb, 0);
344 
345  avio_w8(pb, MAT_MARK_OUT);
346  avio_w8(pb, 4);
347  avio_wb32(pb, gxf->nb_fields);
348 
349  /* estimated size */
350  avio_w8(pb, MAT_SIZE);
351  avio_w8(pb, 4);
352  avio_wb32(pb, avio_size(pb) / 1024);
353 
354  return updateSize(pb, pos);
355 }
356 
357 static int gxf_write_track_description_section(AVFormatContext *s)
358 {
359  GXFContext *gxf = s->priv_data;
360  AVIOContext *pb = s->pb;
361  int64_t pos;
362  int i;
363 
364  pos = avio_tell(pb);
365  avio_wb16(pb, 0); /* size */
366  for (i = 0; i < s->nb_streams; ++i)
367  gxf_write_track_description(s, s->streams[i]->priv_data, i);
368 
369  gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams);
370 
371  return updateSize(pb, pos);
372 }
373 
374 static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
375 {
376  GXFContext *gxf = s->priv_data;
377  AVIOContext *pb = s->pb;
378  int64_t pos = avio_tell(pb);
379 
380  if (!rewrite) {
381  if (!(gxf->map_offsets_nb % 30)) {
382  int err;
383  if ((err = av_reallocp_array(&gxf->map_offsets,
384  gxf->map_offsets_nb + 30,
385  sizeof(*gxf->map_offsets))) < 0) {
386  gxf->map_offsets_nb = 0;
387  av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n");
388  return err;
389  }
390  }
391  gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here
392  }
393 
394  gxf_write_packet_header(pb, PKT_MAP);
395 
396  /* preamble */
397  avio_w8(pb, 0xE0); /* version */
398  avio_w8(pb, 0xFF); /* reserved */
399 
400  gxf_write_material_data_section(s);
401  gxf_write_track_description_section(s);
402 
403  return updatePacketSize(pb, pos);
404 }
405 
406 static int gxf_write_flt_packet(AVFormatContext *s)
407 {
408  GXFContext *gxf = s->priv_data;
409  AVIOContext *pb = s->pb;
410  int64_t pos = avio_tell(pb);
411  int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1;
412  int flt_entries = gxf->nb_fields / fields_per_flt;
413  int i = 0;
414 
415  gxf_write_packet_header(pb, PKT_FLT);
416 
417  avio_wl32(pb, fields_per_flt); /* number of fields */
418  avio_wl32(pb, flt_entries); /* number of active flt entries */
419 
420  if (gxf->flt_entries) {
421  for (i = 0; i < flt_entries; i++)
422  avio_wl32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]);
423  }
424 
425  ffio_fill(pb, 0, (1000 - i) * 4);
426 
427  return updatePacketSize(pb, pos);
428 }
429 
430 static int gxf_write_umf_material_description(AVFormatContext *s)
431 {
432  GXFContext *gxf = s->priv_data;
433  AVIOContext *pb = s->pb;
434  int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
435  int64_t timestamp = 0;
436  uint64_t nb_fields;
437  uint32_t timecode_in; // timecode at mark in
438  uint32_t timecode_out; // timecode at mark out
439 
440  ff_parse_creation_time_metadata(s, &timestamp, 1);
441 
442  timecode_in = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
443  gxf->tc.hh, gxf->tc.mm,
444  gxf->tc.ss, gxf->tc.ff);
445 
446  nb_fields = gxf->nb_fields +
447  gxf->tc.hh * (timecode_base * 3600) +
448  gxf->tc.mm * (timecode_base * 60) +
449  gxf->tc.ss * timecode_base +
450  gxf->tc.ff;
451 
452  timecode_out = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
453  nb_fields / (timecode_base * 3600) % 24,
454  nb_fields / (timecode_base * 60) % 60,
455  nb_fields / timecode_base % 60,
456  nb_fields % timecode_base);
457 
458  avio_wl32(pb, gxf->flags);
459  avio_wl32(pb, gxf->nb_fields); /* length of the longest track */
460  avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */
461  avio_wl32(pb, 0); /* mark in */
462  avio_wl32(pb, gxf->nb_fields); /* mark out */
463  avio_wl32(pb, timecode_in); /* timecode mark in */
464  avio_wl32(pb, timecode_out); /* timecode mark out */
465  avio_wl64(pb, timestamp); /* modification time */
466  avio_wl64(pb, timestamp); /* creation time */
467  avio_wl16(pb, 0); /* reserved */
468  avio_wl16(pb, 0); /* reserved */
469  avio_wl16(pb, gxf->audio_tracks);
470  avio_wl16(pb, 1); /* timecode track count */
471  avio_wl16(pb, 0); /* reserved */
472  avio_wl16(pb, gxf->mpeg_tracks);
473  return 48;
474 }
475 
476 static int gxf_write_umf_payload(AVFormatContext *s)
477 {
478  GXFContext *gxf = s->priv_data;
479  AVIOContext *pb = s->pb;
480 
481  avio_wl32(pb, gxf->umf_length); /* total length of the umf data */
482  avio_wl32(pb, 3); /* version */
483  avio_wl32(pb, s->nb_streams+1);
484  avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */
485  avio_wl32(pb, gxf->umf_track_size);
486  avio_wl32(pb, s->nb_streams+1);
487  avio_wl32(pb, gxf->umf_media_offset);
488  avio_wl32(pb, gxf->umf_media_size);
489  avio_wl32(pb, gxf->umf_length); /* user data offset */
490  avio_wl32(pb, 0); /* user data size */
491  avio_wl32(pb, 0); /* reserved */
492  avio_wl32(pb, 0); /* reserved */
493  return 48;
494 }
495 
496 static int gxf_write_umf_track_description(AVFormatContext *s)
497 {
498  AVIOContext *pb = s->pb;
499  GXFContext *gxf = s->priv_data;
500  int64_t pos = avio_tell(pb);
501  int i;
502 
503  gxf->umf_track_offset = pos - gxf->umf_start_offset;
504  for (i = 0; i < s->nb_streams; ++i) {
505  GXFStreamContext *sc = s->streams[i]->priv_data;
506  avio_wl16(pb, sc->media_info);
507  avio_wl16(pb, 1);
508  }
509 
510  avio_wl16(pb, gxf->timecode_track.media_info);
511  avio_wl16(pb, 1);
512 
513  return avio_tell(pb) - pos;
514 }
515 
516 static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
517 {
518  GXFStreamContext *sc = st->priv_data;
519 
520  if (st->codecpar->format == AV_PIX_FMT_YUV422P)
521  avio_wl32(pb, 2);
522  else
523  avio_wl32(pb, 1); /* default to 420 */
524  avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
525  avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
526  avio_wl32(pb, 1); /* I picture per GOP */
527  avio_wl32(pb, sc->p_per_gop);
528  avio_wl32(pb, sc->b_per_i_or_p);
529  if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO)
530  avio_wl32(pb, 2);
531  else if (st->codecpar->codec_id == AV_CODEC_ID_MPEG1VIDEO)
532  avio_wl32(pb, 1);
533  else
534  avio_wl32(pb, 0);
535  avio_wl32(pb, 0); /* reserved */
536  return 32;
537 }
538 
539 static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop)
540 {
541  avio_wl32(pb, drop); /* drop frame */
542  ffio_fill(pb, 0, 7 * 4); /* reserved */
543  return 32;
544 }
545 
546 static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc, AVStream *st)
547 {
548  int dv_umf_data = 0;
549 
550  if (st->codecpar->format == AV_PIX_FMT_YUV420P)
551  dv_umf_data |= 0x20; /* marks as DVCAM instead of DVPRO */
552  avio_wl32(pb, dv_umf_data);
553  ffio_fill(pb, 0, 7 * 4);
554  return 32;
555 }
556 
557 static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
558 {
559  avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
560  avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
561  avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */
562  avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */
563  avio_wl32(pb, 0); /* reserved */
564  avio_wl32(pb, 0); /* reserved */
565  return 32;
566 }
567 
568 static int gxf_write_umf_media_description(AVFormatContext *s)
569 {
570  GXFContext *gxf = s->priv_data;
571  AVIOContext *pb = s->pb;
572  int64_t pos;
573 
574  pos = avio_tell(pb);
575  gxf->umf_media_offset = pos - gxf->umf_start_offset;
576  for (unsigned i = 0; i <= s->nb_streams; ++i) {
577  GXFStreamContext *sc;
578  int64_t startpos, curpos;
579 
580  if (i == s->nb_streams)
581  sc = &gxf->timecode_track;
582  else
583  sc = s->streams[i]->priv_data;
584 
585  startpos = avio_tell(pb);
586  avio_wl16(pb, 0); /* length */
587  avio_wl16(pb, sc->media_info);
588  avio_wl16(pb, 0); /* reserved */
589  avio_wl16(pb, 0); /* reserved */
590  avio_wl32(pb, gxf->nb_fields);
591  avio_wl32(pb, 0); /* attributes rw, ro */
592  avio_wl32(pb, 0); /* mark in */
593  avio_wl32(pb, gxf->nb_fields); /* mark out */
594  avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN));
595  avio_wb16(pb, sc->media_info);
596  ffio_fill(pb, 0, 88 - (strlen(ES_NAME_PATTERN) + 2));
597  avio_wl32(pb, sc->track_type);
598  avio_wl32(pb, sc->sample_rate);
599  avio_wl32(pb, sc->sample_size);
600  avio_wl32(pb, 0); /* reserved */
601 
602  if (sc == &gxf->timecode_track)
603  gxf_write_umf_media_timecode(pb, gxf->tc.drop);
604  else {
605  AVStream *st = s->streams[i];
606  switch (st->codecpar->codec_id) {
607  case AV_CODEC_ID_MPEG1VIDEO:
608  case AV_CODEC_ID_MPEG2VIDEO:
609  gxf_write_umf_media_mpeg(pb, st);
610  break;
611  case AV_CODEC_ID_PCM_S16LE:
612  gxf_write_umf_media_audio(pb, sc);
613  break;
614  case AV_CODEC_ID_DVVIDEO:
615  gxf_write_umf_media_dv(pb, sc, st);
616  break;
617  }
618  }
619 
620  curpos = avio_tell(pb);
621  avio_seek(pb, startpos, SEEK_SET);
622  avio_wl16(pb, curpos - startpos);
623  avio_seek(pb, curpos, SEEK_SET);
624  }
625  return avio_tell(pb) - pos;
626 }
627 
628 static int gxf_write_umf_packet(AVFormatContext *s)
629 {
630  GXFContext *gxf = s->priv_data;
631  AVIOContext *pb = s->pb;
632  int64_t pos = avio_tell(pb);
633 
634  gxf_write_packet_header(pb, PKT_UMF);
635 
636  /* preamble */
637  avio_w8(pb, 3); /* first and last (only) packet */
638  avio_wb32(pb, gxf->umf_length); /* data length */
639 
640  gxf->umf_start_offset = avio_tell(pb);
641  gxf_write_umf_payload(s);
642  gxf_write_umf_material_description(s);
643  gxf->umf_track_size = gxf_write_umf_track_description(s);
644  gxf->umf_media_size = gxf_write_umf_media_description(s);
645  gxf->umf_length = avio_tell(pb) - gxf->umf_start_offset;
646  return updatePacketSize(pb, pos);
647 }
648 
649 static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
650 {
651  if (!vsc)
652  return;
653 
654  sc->media_type = vsc->sample_rate == 60 ? 7 : 8;
655  sc->sample_rate = vsc->sample_rate;
656  sc->media_info = ('T'<<8) | '0';
657  sc->track_type = 3;
658  sc->frame_rate_index = vsc->frame_rate_index;
659  sc->lines_index = vsc->lines_index;
660  sc->sample_size = 16;
661  sc->fields = vsc->fields;
662 }
663 
664 static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields)
665 {
666  char c;
667 
668  if (sscanf(tcstr, "%d:%d:%d%c%d", &tc->hh, &tc->mm, &tc->ss, &c, &tc->ff) != 5) {
669  av_log(s, AV_LOG_ERROR, "unable to parse timecode, "
670  "syntax: hh:mm:ss[:;.]ff\n");
671  return -1;
672  }
673 
674  tc->color = 0;
675  tc->drop = c != ':';
676 
677  if (fields == 2)
678  tc->ff = tc->ff * 2;
679 
680  return 0;
681 }
682 
683 static int gxf_write_header(AVFormatContext *s)
684 {
685  AVIOContext *pb = s->pb;
686  GXFContext *gxf = s->priv_data;
687  GXFStreamContext *vsc = NULL;
688  uint8_t tracks[255] = {0};
689  int i, media_info = 0;
690  int ret;
691  AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
692 
693  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
694  av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome\n");
695  return -1;
696  }
697 
698  gxf->flags |= 0x00080000; /* material is simple clip */
699  for (i = 0; i < s->nb_streams; ++i) {
700  AVStream *st = s->streams[i];
701  GXFStreamContext *sc = av_mallocz(sizeof(*sc));
702  if (!sc)
703  return AVERROR(ENOMEM);
704  st->priv_data = sc;
705 
706  sc->media_type = ff_codec_get_tag(gxf_media_types, st->codecpar->codec_id);
707  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
708  if (st->codecpar->codec_id != AV_CODEC_ID_PCM_S16LE) {
709  av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
710  return -1;
711  }
712  if (st->codecpar->sample_rate != 48000) {
713  av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
714  return -1;
715  }
716  if (st->codecpar->ch_layout.nb_channels != 1) {
717  av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
718  return -1;
719  }
720  ret = ff_stream_add_bitstream_filter(st, "pcm_rechunk", "n="AV_STRINGIFY(GXF_SAMPLES_PER_FRAME));
721  if (ret < 0)
722  return ret;
723  sc->track_type = 2;
724  sc->sample_rate = st->codecpar->sample_rate;
725  avpriv_set_pts_info(st, 64, 1, sc->sample_rate);
726  sc->sample_size = 16;
727  sc->frame_rate_index = -2;
728  sc->lines_index = -2;
729  sc->fields = -2;
730  gxf->audio_tracks++;
731  gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
732  media_info = 'A';
733  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
734  if (i != 0) {
735  av_log(s, AV_LOG_ERROR, "video stream must be the first track\n");
736  return -1;
737  }
738  /* FIXME check from time_base ? */
739  if (st->codecpar->height == 480 || st->codecpar->height == 512) { /* NTSC or NTSC+VBI */
740  sc->frame_rate_index = 5;
741  sc->sample_rate = 60;
742  gxf->flags |= 0x00000080;
743  gxf->time_base = (AVRational){ 1001, 60000 };
744  } else if (st->codecpar->height == 576 || st->codecpar->height == 608) { /* PAL or PAL+VBI */
745  sc->frame_rate_index = 6;
746  sc->media_type++;
747  sc->sample_rate = 50;
748  gxf->flags |= 0x00000040;
749  gxf->time_base = (AVRational){ 1, 50 };
750  } else {
751  av_log(s, AV_LOG_ERROR, "unsupported video resolution, "
752  "gxf muxer only accepts PAL or NTSC resolutions currently\n");
753  return -1;
754  }
755  if (!tcr)
756  tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
757  avpriv_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den);
758  if (gxf_find_lines_index(st) < 0)
759  sc->lines_index = -1;
760  sc->sample_size = st->codecpar->bit_rate;
761  sc->fields = 2; /* interlaced */
762 
763  vsc = sc;
764 
765  switch (st->codecpar->codec_id) {
766  case AV_CODEC_ID_MJPEG:
767  sc->track_type = 1;
768  gxf->flags |= 0x00004000;
769  media_info = 'J';
770  break;
771  case AV_CODEC_ID_MPEG1VIDEO:
772  sc->track_type = 9;
773  gxf->mpeg_tracks++;
774  media_info = 'L';
775  break;
776  case AV_CODEC_ID_MPEG2VIDEO:
777  sc->first_gop_closed = -1;
778  sc->track_type = 4;
779  gxf->mpeg_tracks++;
780  gxf->flags |= 0x00008000;
781  media_info = 'M';
782  break;
783  case AV_CODEC_ID_DVVIDEO:
784  if (st->codecpar->format == AV_PIX_FMT_YUV422P) {
785  sc->media_type += 2;
786  sc->track_type = 6;
787  gxf->flags |= 0x00002000;
788  media_info = 'E';
789  } else {
790  sc->track_type = 5;
791  gxf->flags |= 0x00001000;
792  media_info = 'D';
793  }
794  break;
795  default:
796  av_log(s, AV_LOG_ERROR, "video codec not supported\n");
797  return -1;
798  }
799  }
800  /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
801  sc->media_info = media_info<<8 | ('0'+tracks[media_info]++);
802  sc->order = s->nb_streams - st->index;
803  }
804 
805  if (tcr && vsc)
806  gxf_init_timecode(s, &gxf->tc, tcr->value, vsc->fields);
807 
808  gxf_init_timecode_track(&gxf->timecode_track, vsc);
809  gxf->flags |= 0x200000; // time code track is non-drop frame
810 
811  if ((ret = gxf_write_map_packet(s, 0)) < 0)
812  return ret;
813  gxf_write_flt_packet(s);
814  gxf_write_umf_packet(s);
815 
816  gxf->packet_count = 3;
817 
818  return 0;
819 }
820 
821 static int gxf_write_eos_packet(AVIOContext *pb)
822 {
823  int64_t pos = avio_tell(pb);
824 
825  gxf_write_packet_header(pb, PKT_EOS);
826  return updatePacketSize(pb, pos);
827 }
828 
829 static int gxf_write_trailer(AVFormatContext *s)
830 {
831  GXFContext *gxf = s->priv_data;
832  AVIOContext *pb = s->pb;
833  int64_t end;
834  int i;
835  int ret;
836 
837  gxf_write_eos_packet(pb);
838  end = avio_tell(pb);
839  avio_seek(pb, 0, SEEK_SET);
840  /* overwrite map, flt and umf packets with new values */
841  if ((ret = gxf_write_map_packet(s, 1)) < 0)
842  return ret;
843  gxf_write_flt_packet(s);
844  gxf_write_umf_packet(s);
845  /* update duration in all map packets */
846  for (i = 1; i < gxf->map_offsets_nb; i++) {
847  avio_seek(pb, gxf->map_offsets[i], SEEK_SET);
848  if ((ret = gxf_write_map_packet(s, 1)) < 0)
849  return ret;
850  }
851 
852  avio_seek(pb, end, SEEK_SET);
853 
854  return 0;
855 }
856 
857 static void gxf_deinit(AVFormatContext *s)
858 {
859  GXFContext *gxf = s->priv_data;
860 
861  av_freep(&gxf->flt_entries);
862  av_freep(&gxf->map_offsets);
863 }
864 
865 static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
866 {
867  uint32_t c=-1;
868  int i;
869  for(i=0; i<size-4 && c!=0x100; i++){
870  c = (c<<8) + buf[i];
871  if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
872  sc->first_gop_closed= (buf[i+4]>>6)&1;
873  }
874  return (buf[i+1]>>3)&7;
875 }
876 
877 static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
878 {
879  GXFContext *gxf = s->priv_data;
880  AVIOContext *pb = s->pb;
881  AVStream *st = s->streams[pkt->stream_index];
882  GXFStreamContext *sc = st->priv_data;
883  unsigned field_nb;
884  /* If the video is frame-encoded, the frame numbers shall be represented by
885  * even field numbers.
886  * see SMPTE360M-2004 6.4.2.1.3 Media field number */
887  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
888  field_nb = gxf->nb_fields;
889  } else {
890  field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
891  (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
892  }
893 
894  avio_w8(pb, sc->media_type);
895  avio_w8(pb, st->index);
896  avio_wb32(pb, field_nb);
897  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
898  avio_wb16(pb, 0);
899  avio_wb16(pb, size / 2);
900  } else if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
901  int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
902  if (frame_type == AV_PICTURE_TYPE_I) {
903  avio_w8(pb, 0x0d);
904  sc->iframes++;
905  } else if (frame_type == AV_PICTURE_TYPE_B) {
906  avio_w8(pb, 0x0f);
907  sc->bframes++;
908  } else {
909  avio_w8(pb, 0x0e);
910  sc->pframes++;
911  }
912  avio_wb24(pb, size);
913  } else if (st->codecpar->codec_id == AV_CODEC_ID_DVVIDEO) {
914  avio_w8(pb, size / 4096);
915  avio_wb24(pb, 0);
916  } else
917  avio_wb32(pb, size);
918  avio_wb32(pb, field_nb);
919  avio_w8(pb, 1); /* flags */
920  avio_w8(pb, 0); /* reserved */
921  return 16;
922 }
923 
924 static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
925 {
926  GXFContext *gxf = s->priv_data;
927  AVIOContext *pb = s->pb;
928  AVStream *st = s->streams[pkt->stream_index];
929  int64_t pos = avio_tell(pb);
930  int padding = 0;
931  unsigned packet_start_offset = avio_tell(pb) / 1024;
932  int ret;
933 
934  gxf_write_packet_header(pb, PKT_MEDIA);
935  if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
936  padding = 4 - pkt->size % 4;
937  else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
938  padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
939  gxf_write_media_preamble(s, pkt, pkt->size + padding);
940  avio_write(pb, pkt->data, pkt->size);
941  gxf_write_padding(pb, padding);
942 
943  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
944  if (!(gxf->flt_entries_nb % 500)) {
945  int err;
946  if ((err = av_reallocp_array(&gxf->flt_entries,
947  gxf->flt_entries_nb + 500,
948  sizeof(*gxf->flt_entries))) < 0) {
949  gxf->flt_entries_nb = 0;
950  gxf->nb_fields = 0;
951  av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
952  return err;
953  }
954  }
955  gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset;
956  gxf->nb_fields += 2; // count fields
957  }
958 
959  updatePacketSize(pb, pos);
960 
961  gxf->packet_count++;
962  if (gxf->packet_count == 100) {
963  if ((ret = gxf_write_map_packet(s, 0)) < 0)
964  return ret;
965  gxf->packet_count = 0;
966  }
967 
968  return 0;
969 }
970 
971 static int gxf_compare_field_nb(AVFormatContext *s, const AVPacket *next,
972  const AVPacket *cur)
973 {
974  GXFContext *gxf = s->priv_data;
975  const AVPacket *pkt[2] = { cur, next };
976  int i, field_nb[2];
977  GXFStreamContext *sc[2];
978 
979  for (i = 0; i < 2; i++) {
980  AVStream *st = s->streams[pkt[i]->stream_index];
981  sc[i] = st->priv_data;
982  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
983  field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den,
984  (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
985  field_nb[i] &= ~1; // compare against even field number because audio must be before video
986  } else
987  field_nb[i] = pkt[i]->dts; // dts are field based
988  }
989 
990  return field_nb[1] > field_nb[0] ||
991  (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order);
992 }
993 
994 static int gxf_interleave_packet(AVFormatContext *s, AVPacket *pkt,
995  int flush, int has_packet)
996 {
997  int ret;
998  if (has_packet) {
999  AVStream *st = s->streams[pkt->stream_index];
1000  GXFStreamContext *sc = st->priv_data;
1001  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1002  pkt->pts = pkt->dts = sc->pkt_cnt * 2; // enforce 2 fields
1003  else
1004  pkt->pts = pkt->dts = sc->pkt_cnt * GXF_SAMPLES_PER_FRAME;
1005  sc->pkt_cnt++;
1006  if ((ret = ff_interleave_add_packet(s, pkt, gxf_compare_field_nb)) < 0)
1007  return ret;
1008  }
1009  return ff_interleave_packet_per_dts(s, pkt, flush, 0);
1010 }
1011 
1012 const AVOutputFormat ff_gxf_muxer = {
1013  .name = "gxf",
1014  .long_name = NULL_IF_CONFIG_SMALL("GXF (General eXchange Format)"),
1015  .extensions = "gxf",
1016  .priv_data_size = sizeof(GXFContext),
1017  .audio_codec = AV_CODEC_ID_PCM_S16LE,
1018  .video_codec = AV_CODEC_ID_MPEG2VIDEO,
1019  .write_header = gxf_write_header,
1020  .write_packet = gxf_write_packet,
1021  .write_trailer = gxf_write_trailer,
1022  .deinit = gxf_deinit,
1023  .interleave_packet = gxf_interleave_packet,
1024 };
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:318
gxf_write_dv_auxiliary
static int gxf_write_dv_auxiliary(AVIOContext *pb, AVStream *st)
Definition: gxfenc.c:218
gxf_write_timecode_auxiliary
static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFContext *gxf)
Definition: gxfenc.c:231
gxf_write_mpeg_auxiliary
static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st)
Definition: gxfenc.c:179
GXFStreamContext::lines_index
int lines_index
Definition: gxfenc.c:54
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: codec_id.h:430
GXFStreamContext::sample_rate
uint32_t sample_rate
Definition: gxfenc.c:50
AVOutputFormat::name
const char * name
Definition: avformat.h:510
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
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:57
PKT_EOS
@ PKT_EOS
Definition: gxf.h:28
gxf_write_umf_media_dv
static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc, AVStream *st)
Definition: gxfenc.c:546
GXFTimecode
Definition: gxfenc.c:37
AVStream::priv_data
void * priv_data
Definition: avformat.h:964
TRACK_FPF
@ TRACK_FPF
Definition: gxf.h:49
GXFStreamContext::bframes
int bframes
Definition: gxfenc.c:58
TRACK_VER
@ TRACK_VER
Definition: gxf.h:45
GXFStreamContext::media_type
uint16_t media_type
Definition: gxfenc.c:51
GXFContext::map_offsets_nb
unsigned map_offsets_nb
Definition: gxfenc.c:83
deinit
static void deinit(AVFormatContext *s)
Definition: chromaprint.c:49
AVPacket::data
uint8_t * data
Definition: packet.h:374
GXFContext::map_offsets
uint64_t * map_offsets
offset of map packets
Definition: gxfenc.c:82
TRACK_FPS
@ TRACK_FPS
Definition: gxf.h:47
ff_parse_creation_time_metadata
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: mux_utils.c:152
avio_wl64
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:454
GXFContext::umf_length
uint32_t umf_length
Definition: gxfenc.c:74
mathematics.h
GXFStreamContext::p_per_gop
int p_per_gop
Definition: gxfenc.c:59
gxf_write_umf_media_mpeg
static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
Definition: gxfenc.c:516
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:300
TRACK_LINES
@ TRACK_LINES
Definition: gxf.h:48
gxf_write_umf_packet
static int gxf_write_umf_packet(AVFormatContext *s)
Definition: gxfenc.c:628
intfloat.h
gxf_media_types
static const AVCodecTag gxf_media_types[]
Definition: gxfenc.c:99
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:352
gxf_write_header
static int gxf_write_header(AVFormatContext *s)
Definition: gxfenc.c:683
GXFContext::flt_entries_nb
unsigned flt_entries_nb
Definition: gxfenc.c:81
avio_wl16
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:466
gxf_lines_tab
static const struct @263 gxf_lines_tab[]
GXFStreamContext::b_per_i_or_p
int b_per_i_or_p
number of B-frames per I-frame or P-frame
Definition: gxfenc.c:60
gxf_parse_mpeg_frame
static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
Definition: gxfenc.c:865
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:697
ff_gxf_muxer
const AVOutputFormat ff_gxf_muxer
Definition: gxfenc.c:1012
updatePacketSize
static int64_t updatePacketSize(AVIOContext *pb, int64_t pos)
Definition: gxfenc.c:140
gxf_write_packet
static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: gxfenc.c:924
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:505
PKT_MAP
@ PKT_MAP
Definition: gxf.h:26
type
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 type
Definition: writing_filters.txt:86
TRACK_AUX
@ TRACK_AUX
Definition: gxf.h:44
gxf_find_lines_index
static int gxf_find_lines_index(AVStream *st)
Definition: gxfenc.c:121
AV_ROUND_UP
@ AV_ROUND_UP
Round toward +infinity.
Definition: mathematics.h:83
GXFStreamContext::sample_size
uint32_t sample_size
Definition: gxfenc.c:49
gxf_init_timecode_track
static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
Definition: gxfenc.c:649
AVRational::num
int num
Numerator.
Definition: rational.h:59
ff_interleave_packet_per_dts
int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *pkt, int flush, int has_packet)
Interleave an AVPacket per dts so it can be muxed.
Definition: mux.c:918
gxf_write_map_packet
static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
Definition: gxfenc.c:374
avassert.h
PKT_UMF
@ PKT_UMF
Definition: gxf.h:30
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
AVCodecTag
Definition: internal.h:50
GXFContext::mpeg_tracks
uint16_t mpeg_tracks
Definition: gxfenc.c:69
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:40
MAT_NAME
@ MAT_NAME
Definition: gxf.h:34
s
#define s(width, name)
Definition: cbs_vp9.c:256
GXFContext::time_base
AVRational time_base
Definition: gxfenc.c:77
gxf_write_umf_media_audio
static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
Definition: gxfenc.c:557
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
GXFContext::umf_track_offset
uint32_t umf_track_offset
Definition: gxfenc.c:72
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
MAT_SIZE
@ MAT_SIZE
Definition: gxf.h:39
GXFStreamContext::pframes
int pframes
Definition: gxfenc.c:57
gxf_write_padding
static void gxf_write_padding(AVIOContext *pb, int64_t to_pad)
Definition: gxfenc.c:135
MAT_MARK_OUT
@ MAT_MARK_OUT
Definition: gxf.h:38
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
updateSize
static int64_t updateSize(AVIOContext *pb, int64_t pos)
Definition: gxfenc.c:157
GXFContext::flags
int flags
Definition: gxfenc.c:78
MAT_FIRST_FIELD
@ MAT_FIRST_FIELD
Definition: gxf.h:35
fields
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
Definition: filter_design.txt:155
AVFormatContext
Format I/O context.
Definition: avformat.h:1213
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:606
NULL
#define NULL
Definition: coverity.c:32
GXFContext::nb_fields
uint32_t nb_fields
Definition: gxfenc.c:67
GXFContext::creation_time
int64_t creation_time
Definition: gxfenc.c:70
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:100
ff_interleave_add_packet
int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, int(*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
Add packet to an AVFormatContext's packet_buffer list, determining its interleaved position using com...
Definition: mux.c:814
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
GXFContext::umf_track_size
uint16_t umf_track_size
Definition: gxfenc.c:75
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
MAT_LAST_FIELD
@ MAT_LAST_FIELD
Definition: gxf.h:36
AVStream::metadata
AVDictionary * metadata
Definition: avformat.h:1019
avio_w8
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:210
ffio_fill
void ffio_fill(AVIOContext *s, int b, int64_t count)
Definition: aviobuf.c:218
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:212
gxf_write_umf_material_description
static int gxf_write_umf_material_description(AVFormatContext *s)
Definition: gxfenc.c:430
GXF_TIMECODE
#define GXF_TIMECODE(c, d, h, m, s, f)
Definition: gxfenc.c:34
index
int index
Definition: gxfenc.c:89
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
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:177
AV_CODEC_ID_MPEG1VIDEO
@ AV_CODEC_ID_MPEG1VIDEO
Definition: codec_id.h:51
GXFContext::tc
GXFTimecode tc
Definition: gxfenc.c:85
gxf_write_material_data_section
static int gxf_write_material_data_section(AVFormatContext *s)
Definition: gxfenc.c:306
gxf_write_umf_media_timecode
static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop)
Definition: gxfenc.c:539
av_rescale_rnd
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
gxf_interleave_packet
static int gxf_interleave_packet(AVFormatContext *s, AVPacket *pkt, int flush, int has_packet)
Definition: gxfenc.c:994
AVIOContext
Bytestream IO Context.
Definition: avio.h:162
AV_CODEC_ID_PCM_S24LE
@ AV_CODEC_ID_PCM_S24LE
Definition: codec_id.h:330
GXFTimecode::color
int color
Definition: gxfenc.c:42
AVPacket::size
int size
Definition: packet.h:375
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:117
gxf_write_trailer
static int gxf_write_trailer(AVFormatContext *s)
Definition: gxfenc.c:829
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:263
size
int size
Definition: twinvq_data.h:10344
GXFStreamContext::first_gop_closed
int first_gop_closed
Definition: gxfenc.c:61
gxf_write_track_description_section
static int gxf_write_track_description_section(AVFormatContext *s)
Definition: gxfenc.c:357
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:373
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:232
GXF_AUDIO_PACKET_SIZE
#define GXF_AUDIO_PACKET_SIZE
Definition: gxfenc.c:32
avio_wb32
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:394
av_reallocp_array
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate an array through a pointer to a pointer.
Definition: mem.c:233
avio_wl32
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:386
gxf_init_timecode
static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields)
Definition: gxfenc.c:664
GXFContext::umf_media_offset
uint32_t umf_media_offset
Definition: gxfenc.c:73
gxf.h
ES_NAME_PATTERN
#define ES_NAME_PATTERN
Definition: gxfenc.c:119
PKT_FLT
@ PKT_FLT
Definition: gxf.h:29
GXF_SAMPLES_PER_FRAME
#define GXF_SAMPLES_PER_FRAME
Definition: gxfenc.c:31
gxf_write_media_preamble
static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
Definition: gxfenc.c:877
TRACK_NAME
@ TRACK_NAME
Definition: gxf.h:43
GXFContext::timecode_track
GXFStreamContext timecode_track
Definition: gxfenc.c:79
TRACK_MPG_AUX
@ TRACK_MPG_AUX
Definition: gxf.h:46
AV_CODEC_ID_MJPEG
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:57
av_double2int
static av_always_inline uint64_t av_double2int(double f)
Reinterpret a double as a 64-bit integer.
Definition: intfloat.h:70
GXFContext::umf_start_offset
uint32_t umf_start_offset
Definition: gxfenc.c:71
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:48
AVOutputFormat
Definition: avformat.h:509
GXFStreamContext::iframes
int iframes
Definition: gxfenc.c:56
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:367
frame_type
frame_type
Definition: jpeg2000_parser.c:31
avio_internal.h
GXFContext::umf_media_size
uint16_t umf_media_size
Definition: gxfenc.c:76
AVCodecParameters::height
int height
Definition: codec_par.h:128
gxf_write_umf_payload
static int gxf_write_umf_payload(AVFormatContext *s)
Definition: gxfenc.c:476
gxf_write_eos_packet
static int gxf_write_eos_packet(AVIOContext *pb)
Definition: gxfenc.c:821
AV_STRINGIFY
#define AV_STRINGIFY(s)
Definition: macros.h:66
AV_CODEC_ID_DVVIDEO
@ AV_CODEC_ID_DVVIDEO
Definition: codec_id.h:74
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:264
GXFContext
Definition: gxfenc.c:65
len
int len
Definition: vorbis_enc_data.h:426
GXFTimecode::drop
int drop
Definition: gxfenc.c:43
GXFStreamContext::order
unsigned order
interleaving order
Definition: gxfenc.c:62
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:948
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:260
gxf_deinit
static void gxf_deinit(AVFormatContext *s)
Definition: gxfenc.c:857
GXFContext::av_class
AVClass * av_class
Definition: gxfenc.c:66
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
GXFTimecode::hh
int hh
Definition: gxfenc.c:38
GXFTimecode::ss
int ss
Definition: gxfenc.c:40
GXFStreamContext::media_info
uint16_t media_info
Definition: gxfenc.c:52
GXFTimecode::ff
int ff
Definition: gxfenc.c:41
gxf_write_track_description
static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
Definition: gxfenc.c:245
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:956
GXFStreamContext::frame_rate_index
int frame_rate_index
Definition: gxfenc.c:53
ff_stream_add_bitstream_filter
int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
Add a bitstream filter to a stream.
Definition: mux.c:1307
gxf_write_umf_media_description
static int gxf_write_umf_media_description(AVFormatContext *s)
Definition: gxfenc.c:568
MAT_MARK_IN
@ MAT_MARK_IN
Definition: gxf.h:37
GXFContext::flt_entries
unsigned * flt_entries
offsets of packets /1024, starts after 2nd video field
Definition: gxfenc.c:80
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:41
AV_PICTURE_TYPE_B
@ AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:276
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
AVRational::den
int den
Denominator.
Definition: rational.h:60
SERVER_PATH
#define SERVER_PATH
Definition: gxfenc.c:118
ff_codec_get_tag
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:134
PKT_MEDIA
@ PKT_MEDIA
Definition: gxf.h:27
gxf_write_flt_packet
static int gxf_write_flt_packet(AVFormatContext *s)
Definition: gxfenc.c:406
GXFStreamContext::pkt_cnt
int64_t pkt_cnt
Definition: gxfenc.c:47
gxf_write_packet_header
static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type)
Definition: gxfenc.c:168
AVPacket::stream_index
int stream_index
Definition: packet.h:376
gxf_write_umf_track_description
static int gxf_write_umf_track_description(AVFormatContext *s)
Definition: gxfenc.c:496
GXFStreamContext
Definition: gxfenc.c:46
height
int height
Definition: gxfenc.c:89
tc
#define tc
Definition: regdef.h:69
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
AVCodecParameters::format
int format
Definition: codec_par.h:85
avio_wb24
void avio_wb24(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:484
GXFStreamContext::track_type
uint32_t track_type
Definition: gxfenc.c:48
GXFTimecode::mm
int mm
Definition: gxfenc.c:39
AVDictionaryEntry
Definition: dict.h:79
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:61
AVPacket
This structure stores compressed data.
Definition: packet.h:351
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
GXFPktType
GXFPktType
Definition: gxf.h:25
avio_wb16
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:472
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:90
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
gxf_compare_field_nb
static int gxf_compare_field_nb(AVFormatContext *s, const AVPacket *next, const AVPacket *cur)
Definition: gxfenc.c:971
GXFContext::audio_tracks
uint16_t audio_tracks
Definition: gxfenc.c:68
GXFStreamContext::fields
int fields
Definition: gxfenc.c:55
AVDictionaryEntry::value
char * value
Definition: dict.h:81
write_packet
static int write_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: v4l2enc.c:92
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:346
AV_CODEC_ID_MPEG2VIDEO
@ AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:52
GXFContext::packet_count
unsigned packet_count
Definition: gxfenc.c:84
snprintf
#define snprintf
Definition: snprintf.h:34
mux.h
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