3 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
5 * This file is part of FFmpeg.
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.
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.
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
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"
30 #include "audiointerleave.h"
32 #define GXF_AUDIO_PACKET_SIZE 65536
34 #define GXF_TIMECODE(c, d, h, m, s, f) \
35 ((c) << 30 | (d) << 29 | (h) << 24 | (m) << 16 | (s) << 8 | (f))
37 typedef struct GXFTimecode{
46 typedef struct GXFStreamContext {
47 AudioInterleaveContext aic;
60 int b_per_i_or_p; ///< number of B frames per I frame or P frame
62 unsigned order; ///< interleaving order
65 typedef struct GXFContext {
68 uint16_t audio_tracks;
70 int64_t creation_time;
71 uint32_t umf_start_offset;
72 uint32_t umf_track_offset;
73 uint32_t umf_media_offset;
75 uint16_t umf_track_size;
76 uint16_t umf_media_size;
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;
91 { 480, 1 }, /* NTSC */
92 { 512, 1 }, /* NTSC + VBI */
94 { 608, 2 }, /* PAL + VBI */
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 },
118 #define SERVER_PATH "EXT:/PDR/default/"
119 #define ES_NAME_PATTERN "EXT:/PDR/default/ES."
121 static int gxf_find_lines_index(AVStream *st)
123 GXFStreamContext *sc = st->priv_data;
126 for (i = 0; i < 6; ++i) {
127 if (st->codec->height == gxf_lines_tab[i].height) {
128 sc->lines_index = gxf_lines_tab[i].index;
135 static void gxf_write_padding(AVIOContext *pb, int64_t to_pad)
137 for (; to_pad > 0; to_pad--) {
142 static int64_t updatePacketSize(AVIOContext *pb, int64_t pos)
147 size = avio_tell(pb) - pos;
149 gxf_write_padding(pb, 4 - size % 4);
150 size = avio_tell(pb) - pos;
152 curpos = avio_tell(pb);
153 avio_seek(pb, pos + 6, SEEK_SET);
155 avio_seek(pb, curpos, SEEK_SET);
159 static int64_t updateSize(AVIOContext *pb, int64_t pos)
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);
170 static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type)
172 avio_wb32(pb, 0); /* packet leader for synchro */
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 */
181 static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st)
183 GXFStreamContext *sc = st->priv_data;
185 int size, starting_line;
188 sc->p_per_gop = sc->pframes / sc->iframes;
189 if (sc->pframes % sc->iframes)
192 sc->b_per_i_or_p = sc->bframes / sc->pframes;
193 if (sc->bframes % sc->pframes)
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 */
201 if (st->codec->height == 512 || st->codec->height == 608)
202 starting_line = 7; // VBI
203 else if (st->codec->height == 480)
206 starting_line = 23; // default PAL
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->codec->bit_rate, sc->p_per_gop, sc->b_per_i_or_p,
211 st->codec->pix_fmt == AV_PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
212 starting_line, (st->codec->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);
220 static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFContext *gxf)
222 uint32_t timecode = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
223 gxf->tc.hh, gxf->tc.mm,
224 gxf->tc.ss, gxf->tc.ff);
226 avio_wl32(pb, timecode);
232 static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
234 GXFContext *gxf = s->priv_data;
235 AVIOContext *pb = s->pb;
237 int mpeg = sc->track_type == 4 || sc->track_type == 9;
239 /* track description section */
240 avio_w8(pb, sc->media_type + 0x80);
241 avio_w8(pb, index + 0xC0);
244 avio_wb16(pb, 0); /* size */
246 /* media file name */
247 avio_w8(pb, TRACK_NAME);
248 avio_w8(pb, strlen(ES_NAME_PATTERN) + 3);
249 avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1);
250 avio_wb16(pb, sc->media_info);
254 /* auxiliary information */
255 avio_w8(pb, TRACK_AUX);
257 if (sc->track_type == 3)
258 gxf_write_timecode_auxiliary(pb, gxf);
263 /* file system version */
264 avio_w8(pb, TRACK_VER);
269 gxf_write_mpeg_auxiliary(pb, s->streams[index]);
272 avio_w8(pb, TRACK_FPS);
274 avio_wb32(pb, sc->frame_rate_index);
276 /* lines per frame */
277 avio_w8(pb, TRACK_LINES);
279 avio_wb32(pb, sc->lines_index);
281 /* fields per frame */
282 avio_w8(pb, TRACK_FPF);
284 avio_wb32(pb, sc->fields);
286 return updateSize(pb, pos);
289 static int gxf_write_material_data_section(AVFormatContext *s)
291 GXFContext *gxf = s->priv_data;
292 AVIOContext *pb = s->pb;
295 const char *filename = strrchr(s->filename, '/');
298 avio_wb16(pb, 0); /* size */
304 filename = s->filename;
305 len = strlen(filename);
307 avio_w8(pb, MAT_NAME);
308 avio_w8(pb, strlen(SERVER_PATH) + len + 1);
309 avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1);
310 avio_write(pb, filename, len);
314 avio_w8(pb, MAT_FIRST_FIELD);
319 avio_w8(pb, MAT_LAST_FIELD);
321 avio_wb32(pb, gxf->nb_fields);
324 avio_w8(pb, MAT_MARK_IN);
328 avio_w8(pb, MAT_MARK_OUT);
330 avio_wb32(pb, gxf->nb_fields);
333 avio_w8(pb, MAT_SIZE);
335 avio_wb32(pb, avio_size(pb) / 1024);
337 return updateSize(pb, pos);
340 static int gxf_write_track_description_section(AVFormatContext *s)
342 GXFContext *gxf = s->priv_data;
343 AVIOContext *pb = s->pb;
348 avio_wb16(pb, 0); /* size */
349 for (i = 0; i < s->nb_streams; ++i)
350 gxf_write_track_description(s, s->streams[i]->priv_data, i);
352 gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams);
354 return updateSize(pb, pos);
357 static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
359 GXFContext *gxf = s->priv_data;
360 AVIOContext *pb = s->pb;
361 int64_t pos = avio_tell(pb);
364 if (!(gxf->map_offsets_nb % 30)) {
365 gxf->map_offsets = av_realloc_f(gxf->map_offsets,
366 sizeof(*gxf->map_offsets),
367 gxf->map_offsets_nb+30);
368 if (!gxf->map_offsets) {
369 av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n");
373 gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here
376 gxf_write_packet_header(pb, PKT_MAP);
379 avio_w8(pb, 0xE0); /* version */
380 avio_w8(pb, 0xFF); /* reserved */
382 gxf_write_material_data_section(s);
383 gxf_write_track_description_section(s);
385 return updatePacketSize(pb, pos);
388 static int gxf_write_flt_packet(AVFormatContext *s)
390 GXFContext *gxf = s->priv_data;
391 AVIOContext *pb = s->pb;
392 int64_t pos = avio_tell(pb);
393 int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1;
394 int flt_entries = gxf->nb_fields / fields_per_flt;
397 gxf_write_packet_header(pb, PKT_FLT);
399 avio_wl32(pb, fields_per_flt); /* number of fields */
400 avio_wl32(pb, flt_entries); /* number of active flt entries */
402 if (gxf->flt_entries) {
403 for (i = 0; i < flt_entries; i++)
404 avio_wl32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]);
407 for (; i < 1000; i++)
410 return updatePacketSize(pb, pos);
413 static int gxf_write_umf_material_description(AVFormatContext *s)
415 GXFContext *gxf = s->priv_data;
416 AVIOContext *pb = s->pb;
417 int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
418 int64_t timestamp = 0;
419 AVDictionaryEntry *t;
421 uint32_t timecode_in; // timecode at mark in
422 uint32_t timecode_out; // timecode at mark out
424 if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
425 timestamp = ff_iso8601_to_unix_time(t->value);
427 timecode_in = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
428 gxf->tc.hh, gxf->tc.mm,
429 gxf->tc.ss, gxf->tc.ff);
431 nb_fields = gxf->nb_fields +
432 gxf->tc.hh * (timecode_base * 3600) +
433 gxf->tc.mm * (timecode_base * 60) +
434 gxf->tc.ss * timecode_base +
437 timecode_out = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
438 nb_fields / (timecode_base * 3600) % 24,
439 nb_fields / (timecode_base * 60) % 60,
440 nb_fields / timecode_base % 60,
441 nb_fields % timecode_base);
443 avio_wl32(pb, gxf->flags);
444 avio_wl32(pb, gxf->nb_fields); /* length of the longest track */
445 avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */
446 avio_wl32(pb, 0); /* mark in */
447 avio_wl32(pb, gxf->nb_fields); /* mark out */
448 avio_wl32(pb, timecode_in); /* timecode mark in */
449 avio_wl32(pb, timecode_out); /* timecode mark out */
450 avio_wl64(pb, timestamp); /* modification time */
451 avio_wl64(pb, timestamp); /* creation time */
452 avio_wl16(pb, 0); /* reserved */
453 avio_wl16(pb, 0); /* reserved */
454 avio_wl16(pb, gxf->audio_tracks);
455 avio_wl16(pb, 1); /* timecode track count */
456 avio_wl16(pb, 0); /* reserved */
457 avio_wl16(pb, gxf->mpeg_tracks);
461 static int gxf_write_umf_payload(AVFormatContext *s)
463 GXFContext *gxf = s->priv_data;
464 AVIOContext *pb = s->pb;
466 avio_wl32(pb, gxf->umf_length); /* total length of the umf data */
467 avio_wl32(pb, 3); /* version */
468 avio_wl32(pb, s->nb_streams+1);
469 avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */
470 avio_wl32(pb, gxf->umf_track_size);
471 avio_wl32(pb, s->nb_streams+1);
472 avio_wl32(pb, gxf->umf_media_offset);
473 avio_wl32(pb, gxf->umf_media_size);
474 avio_wl32(pb, gxf->umf_length); /* user data offset */
475 avio_wl32(pb, 0); /* user data size */
476 avio_wl32(pb, 0); /* reserved */
477 avio_wl32(pb, 0); /* reserved */
481 static int gxf_write_umf_track_description(AVFormatContext *s)
483 AVIOContext *pb = s->pb;
484 GXFContext *gxf = s->priv_data;
485 int64_t pos = avio_tell(pb);
488 gxf->umf_track_offset = pos - gxf->umf_start_offset;
489 for (i = 0; i < s->nb_streams; ++i) {
490 GXFStreamContext *sc = s->streams[i]->priv_data;
491 avio_wl16(pb, sc->media_info);
495 avio_wl16(pb, gxf->timecode_track.media_info);
498 return avio_tell(pb) - pos;
501 static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
503 GXFStreamContext *sc = st->priv_data;
505 if (st->codec->pix_fmt == AV_PIX_FMT_YUV422P)
508 avio_wl32(pb, 1); /* default to 420 */
509 avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
510 avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
511 avio_wl32(pb, 1); /* I picture per GOP */
512 avio_wl32(pb, sc->p_per_gop);
513 avio_wl32(pb, sc->b_per_i_or_p);
514 if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO)
516 else if (st->codec->codec_id == AV_CODEC_ID_MPEG1VIDEO)
520 avio_wl32(pb, 0); /* reserved */
524 static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop)
526 avio_wl32(pb, drop); /* drop frame */
527 avio_wl32(pb, 0); /* reserved */
528 avio_wl32(pb, 0); /* reserved */
529 avio_wl32(pb, 0); /* reserved */
530 avio_wl32(pb, 0); /* reserved */
531 avio_wl32(pb, 0); /* reserved */
532 avio_wl32(pb, 0); /* reserved */
533 avio_wl32(pb, 0); /* reserved */
537 static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc)
541 for (i = 0; i < 8; i++) {
547 static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
549 avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
550 avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
551 avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */
552 avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */
553 avio_wl32(pb, 0); /* reserved */
554 avio_wl32(pb, 0); /* reserved */
558 static int gxf_write_umf_media_description(AVFormatContext *s)
560 GXFContext *gxf = s->priv_data;
561 AVIOContext *pb = s->pb;
566 gxf->umf_media_offset = pos - gxf->umf_start_offset;
567 for (i = 0; i <= s->nb_streams; ++i) {
568 GXFStreamContext *sc;
569 int64_t startpos, curpos;
571 if (i == s->nb_streams)
572 sc = &gxf->timecode_track;
574 sc = s->streams[i]->priv_data;
576 startpos = avio_tell(pb);
577 avio_wl16(pb, 0); /* length */
578 avio_wl16(pb, sc->media_info);
579 avio_wl16(pb, 0); /* reserved */
580 avio_wl16(pb, 0); /* reserved */
581 avio_wl32(pb, gxf->nb_fields);
582 avio_wl32(pb, 0); /* attributes rw, ro */
583 avio_wl32(pb, 0); /* mark in */
584 avio_wl32(pb, gxf->nb_fields); /* mark out */
585 avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN));
586 avio_wb16(pb, sc->media_info);
587 for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++)
589 avio_wl32(pb, sc->track_type);
590 avio_wl32(pb, sc->sample_rate);
591 avio_wl32(pb, sc->sample_size);
592 avio_wl32(pb, 0); /* reserved */
594 if (sc == &gxf->timecode_track)
595 gxf_write_umf_media_timecode(pb, gxf->tc.drop);
597 AVStream *st = s->streams[i];
598 switch (st->codec->codec_id) {
599 case AV_CODEC_ID_MPEG1VIDEO:
600 case AV_CODEC_ID_MPEG2VIDEO:
601 gxf_write_umf_media_mpeg(pb, st);
603 case AV_CODEC_ID_PCM_S16LE:
604 gxf_write_umf_media_audio(pb, sc);
606 case AV_CODEC_ID_DVVIDEO:
607 gxf_write_umf_media_dv(pb, sc);
612 curpos = avio_tell(pb);
613 avio_seek(pb, startpos, SEEK_SET);
614 avio_wl16(pb, curpos - startpos);
615 avio_seek(pb, curpos, SEEK_SET);
617 return avio_tell(pb) - pos;
620 static int gxf_write_umf_packet(AVFormatContext *s)
622 GXFContext *gxf = s->priv_data;
623 AVIOContext *pb = s->pb;
624 int64_t pos = avio_tell(pb);
626 gxf_write_packet_header(pb, PKT_UMF);
629 avio_w8(pb, 3); /* first and last (only) packet */
630 avio_wb32(pb, gxf->umf_length); /* data length */
632 gxf->umf_start_offset = avio_tell(pb);
633 gxf_write_umf_payload(s);
634 gxf_write_umf_material_description(s);
635 gxf->umf_track_size = gxf_write_umf_track_description(s);
636 gxf->umf_media_size = gxf_write_umf_media_description(s);
637 gxf->umf_length = avio_tell(pb) - gxf->umf_start_offset;
638 return updatePacketSize(pb, pos);
641 static const int GXF_samples_per_frame[] = { 32768, 0 };
643 static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
648 sc->media_type = vsc->sample_rate == 60 ? 7 : 8;
649 sc->sample_rate = vsc->sample_rate;
650 sc->media_info = ('T'<<8) | '0';
652 sc->frame_rate_index = vsc->frame_rate_index;
653 sc->lines_index = vsc->lines_index;
654 sc->sample_size = 16;
655 sc->fields = vsc->fields;
658 static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields)
662 if (sscanf(tcstr, "%d:%d:%d%c%d", &tc->hh, &tc->mm, &tc->ss, &c, &tc->ff) != 5) {
663 av_log(s, AV_LOG_ERROR, "unable to parse timecode, "
664 "syntax: hh:mm:ss[:;.]ff\n");
677 static int gxf_write_header(AVFormatContext *s)
679 AVIOContext *pb = s->pb;
680 GXFContext *gxf = s->priv_data;
681 GXFStreamContext *vsc = NULL;
682 uint8_t tracks[255] = {0};
683 int i, media_info = 0;
684 AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
687 av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome\n");
691 gxf->flags |= 0x00080000; /* material is simple clip */
692 for (i = 0; i < s->nb_streams; ++i) {
693 AVStream *st = s->streams[i];
694 GXFStreamContext *sc = av_mallocz(sizeof(*sc));
696 return AVERROR(ENOMEM);
699 sc->media_type = ff_codec_get_tag(gxf_media_types, st->codec->codec_id);
700 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
701 if (st->codec->codec_id != AV_CODEC_ID_PCM_S16LE) {
702 av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
705 if (st->codec->sample_rate != 48000) {
706 av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
709 if (st->codec->channels != 1) {
710 av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
714 sc->sample_rate = st->codec->sample_rate;
715 avpriv_set_pts_info(st, 64, 1, sc->sample_rate);
716 sc->sample_size = 16;
717 sc->frame_rate_index = -2;
718 sc->lines_index = -2;
721 gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
723 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
725 av_log(s, AV_LOG_ERROR, "video stream must be the first track\n");
728 /* FIXME check from time_base ? */
729 if (st->codec->height == 480 || st->codec->height == 512) { /* NTSC or NTSC+VBI */
730 sc->frame_rate_index = 5;
731 sc->sample_rate = 60;
732 gxf->flags |= 0x00000080;
733 gxf->time_base = (AVRational){ 1001, 60000 };
734 } else if (st->codec->height == 576 || st->codec->height == 608) { /* PAL or PAL+VBI */
735 sc->frame_rate_index = 6;
737 sc->sample_rate = 50;
738 gxf->flags |= 0x00000040;
739 gxf->time_base = (AVRational){ 1, 50 };
741 av_log(s, AV_LOG_ERROR, "unsupported video resolution, "
742 "gxf muxer only accepts PAL or NTSC resolutions currently\n");
746 tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
747 avpriv_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den);
748 if (gxf_find_lines_index(st) < 0)
749 sc->lines_index = -1;
750 sc->sample_size = st->codec->bit_rate;
751 sc->fields = 2; /* interlaced */
755 switch (st->codec->codec_id) {
756 case AV_CODEC_ID_MJPEG:
758 gxf->flags |= 0x00004000;
761 case AV_CODEC_ID_MPEG1VIDEO:
766 case AV_CODEC_ID_MPEG2VIDEO:
767 sc->first_gop_closed = -1;
770 gxf->flags |= 0x00008000;
773 case AV_CODEC_ID_DVVIDEO:
774 if (st->codec->pix_fmt == AV_PIX_FMT_YUV422P) {
777 gxf->flags |= 0x00002000;
781 gxf->flags |= 0x00001000;
786 av_log(s, AV_LOG_ERROR, "video codec not supported\n");
790 /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
791 sc->media_info = media_info<<8 | ('0'+tracks[media_info]++);
792 sc->order = s->nb_streams - st->index;
795 if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0)
799 gxf_init_timecode(s, &gxf->tc, tcr->value, vsc->fields);
801 gxf_init_timecode_track(&gxf->timecode_track, vsc);
802 gxf->flags |= 0x200000; // time code track is non-drop frame
804 gxf_write_map_packet(s, 0);
805 gxf_write_flt_packet(s);
806 gxf_write_umf_packet(s);
808 gxf->packet_count = 3;
814 static int gxf_write_eos_packet(AVIOContext *pb)
816 int64_t pos = avio_tell(pb);
818 gxf_write_packet_header(pb, PKT_EOS);
819 return updatePacketSize(pb, pos);
822 static int gxf_write_trailer(AVFormatContext *s)
824 GXFContext *gxf = s->priv_data;
825 AVIOContext *pb = s->pb;
829 ff_audio_interleave_close(s);
831 gxf_write_eos_packet(pb);
833 avio_seek(pb, 0, SEEK_SET);
834 /* overwrite map, flt and umf packets with new values */
835 gxf_write_map_packet(s, 1);
836 gxf_write_flt_packet(s);
837 gxf_write_umf_packet(s);
839 /* update duration in all map packets */
840 for (i = 1; i < gxf->map_offsets_nb; i++) {
841 avio_seek(pb, gxf->map_offsets[i], SEEK_SET);
842 gxf_write_map_packet(s, 1);
846 avio_seek(pb, end, SEEK_SET);
848 av_freep(&gxf->flt_entries);
849 av_freep(&gxf->map_offsets);
854 static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
858 for(i=0; i<size-4 && c!=0x100; i++){
860 if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
861 sc->first_gop_closed= (buf[i+4]>>6)&1;
863 return (buf[i+1]>>3)&7;
866 static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
868 GXFContext *gxf = s->priv_data;
869 AVIOContext *pb = s->pb;
870 AVStream *st = s->streams[pkt->stream_index];
871 GXFStreamContext *sc = st->priv_data;
873 /* If the video is frame-encoded, the frame numbers shall be represented by
874 * even field numbers.
875 * see SMPTE360M-2004 6.4.2.1.3 Media field number */
876 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
877 field_nb = gxf->nb_fields;
879 field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
880 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
883 avio_w8(pb, sc->media_type);
884 avio_w8(pb, st->index);
885 avio_wb32(pb, field_nb);
886 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
888 avio_wb16(pb, size / 2);
889 } else if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
890 int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
891 if (frame_type == AV_PICTURE_TYPE_I) {
894 } else if (frame_type == AV_PICTURE_TYPE_B) {
902 } else if (st->codec->codec_id == AV_CODEC_ID_DVVIDEO) {
903 avio_w8(pb, size / 4096);
907 avio_wb32(pb, field_nb);
908 avio_w8(pb, 1); /* flags */
909 avio_w8(pb, 0); /* reserved */
913 static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
915 GXFContext *gxf = s->priv_data;
916 AVIOContext *pb = s->pb;
917 AVStream *st = s->streams[pkt->stream_index];
918 int64_t pos = avio_tell(pb);
920 int packet_start_offset = avio_tell(pb) / 1024;
922 gxf_write_packet_header(pb, PKT_MEDIA);
923 if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
924 padding = 4 - pkt->size % 4;
925 else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
926 padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
927 gxf_write_media_preamble(s, pkt, pkt->size + padding);
928 avio_write(pb, pkt->data, pkt->size);
929 gxf_write_padding(pb, padding);
931 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
932 if (!(gxf->flt_entries_nb % 500)) {
933 gxf->flt_entries = av_realloc_f(gxf->flt_entries,
934 sizeof(*gxf->flt_entries),
935 gxf->flt_entries_nb+500);
936 if (!gxf->flt_entries) {
937 av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
941 gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset;
942 gxf->nb_fields += 2; // count fields
945 updatePacketSize(pb, pos);
948 if (gxf->packet_count == 100) {
949 gxf_write_map_packet(s, 0);
950 gxf->packet_count = 0;
958 static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur)
960 GXFContext *gxf = s->priv_data;
961 AVPacket *pkt[2] = { cur, next };
963 GXFStreamContext *sc[2];
965 for (i = 0; i < 2; i++) {
966 AVStream *st = s->streams[pkt[i]->stream_index];
967 sc[i] = st->priv_data;
968 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
969 field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den,
970 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
971 field_nb[i] &= ~1; // compare against even field number because audio must be before video
973 field_nb[i] = pkt[i]->dts; // dts are field based
976 return field_nb[1] > field_nb[0] ||
977 (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order);
980 static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
982 if (pkt && s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
983 pkt->duration = 2; // enforce 2 fields
984 return ff_audio_rechunk_interleave(s, out, pkt, flush,
985 ff_interleave_packet_per_dts, gxf_compare_field_nb);
988 AVOutputFormat ff_gxf_muxer = {
990 .long_name = NULL_IF_CONFIG_SMALL("GXF (General eXchange Format)"),
992 .priv_data_size = sizeof(GXFContext),
993 .audio_codec = AV_CODEC_ID_PCM_S16LE,
994 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
995 .write_header = gxf_write_header,
996 .write_packet = gxf_write_packet,
997 .write_trailer = gxf_write_trailer,
998 .interleave_packet = gxf_interleave_packet,