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/intfloat.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/mathematics.h"
25 #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 { CODEC_ID_MJPEG , 3 }, /* NTSC */
101 { CODEC_ID_MJPEG , 4 }, /* PAL */
102 { CODEC_ID_PCM_S24LE , 9 },
103 { CODEC_ID_PCM_S16LE , 10 },
104 { CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */
105 { CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */
106 { CODEC_ID_DVVIDEO , 13 }, /* NTSC */
107 { CODEC_ID_DVVIDEO , 14 }, /* PAL */
108 { CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */
109 { CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */
110 { CODEC_ID_AC3 , 17 },
111 //{ CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */
112 { CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */
113 { CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */
114 { CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */
115 { 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, 1024, "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 == PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
212 starting_line, (st->codec->height + 15) / 16);
213 avio_w8(pb, TRACK_MPG_AUX);
214 avio_w8(pb, size + 1);
215 avio_write(pb, (uint8_t *)buffer, size + 1);
219 static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFContext *gxf)
221 uint32_t timecode = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
222 gxf->tc.hh, gxf->tc.mm,
223 gxf->tc.ss, gxf->tc.ff);
225 avio_wl32(pb, timecode);
231 static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
233 GXFContext *gxf = s->priv_data;
234 AVIOContext *pb = s->pb;
236 int mpeg = sc->track_type == 4 || sc->track_type == 9;
238 /* track description section */
239 avio_w8(pb, sc->media_type + 0x80);
240 avio_w8(pb, index + 0xC0);
243 avio_wb16(pb, 0); /* size */
245 /* media file name */
246 avio_w8(pb, TRACK_NAME);
247 avio_w8(pb, strlen(ES_NAME_PATTERN) + 3);
248 avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1);
249 avio_wb16(pb, sc->media_info);
253 /* auxiliary information */
254 avio_w8(pb, TRACK_AUX);
256 if (sc->track_type == 3)
257 gxf_write_timecode_auxiliary(pb, gxf);
262 /* file system version */
263 avio_w8(pb, TRACK_VER);
268 gxf_write_mpeg_auxiliary(pb, s->streams[index]);
271 avio_w8(pb, TRACK_FPS);
273 avio_wb32(pb, sc->frame_rate_index);
275 /* lines per frame */
276 avio_w8(pb, TRACK_LINES);
278 avio_wb32(pb, sc->lines_index);
280 /* fields per frame */
281 avio_w8(pb, TRACK_FPF);
283 avio_wb32(pb, sc->fields);
285 return updateSize(pb, pos);
288 static int gxf_write_material_data_section(AVFormatContext *s)
290 GXFContext *gxf = s->priv_data;
291 AVIOContext *pb = s->pb;
294 const char *filename = strrchr(s->filename, '/');
297 avio_wb16(pb, 0); /* size */
303 filename = s->filename;
304 len = strlen(filename);
306 avio_w8(pb, MAT_NAME);
307 avio_w8(pb, strlen(SERVER_PATH) + len + 1);
308 avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1);
309 avio_write(pb, filename, len);
313 avio_w8(pb, MAT_FIRST_FIELD);
318 avio_w8(pb, MAT_LAST_FIELD);
320 avio_wb32(pb, gxf->nb_fields);
323 avio_w8(pb, MAT_MARK_IN);
327 avio_w8(pb, MAT_MARK_OUT);
329 avio_wb32(pb, gxf->nb_fields);
332 avio_w8(pb, MAT_SIZE);
334 avio_wb32(pb, avio_size(pb) / 1024);
336 return updateSize(pb, pos);
339 static int gxf_write_track_description_section(AVFormatContext *s)
341 GXFContext *gxf = s->priv_data;
342 AVIOContext *pb = s->pb;
347 avio_wb16(pb, 0); /* size */
348 for (i = 0; i < s->nb_streams; ++i)
349 gxf_write_track_description(s, s->streams[i]->priv_data, i);
351 gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams);
353 return updateSize(pb, pos);
356 static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
358 GXFContext *gxf = s->priv_data;
359 AVIOContext *pb = s->pb;
360 int64_t pos = avio_tell(pb);
363 if (!(gxf->map_offsets_nb % 30)) {
364 gxf->map_offsets = av_realloc_f(gxf->map_offsets,
365 sizeof(*gxf->map_offsets),
366 gxf->map_offsets_nb+30);
367 if (!gxf->map_offsets) {
368 av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n");
372 gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here
375 gxf_write_packet_header(pb, PKT_MAP);
378 avio_w8(pb, 0xE0); /* version */
379 avio_w8(pb, 0xFF); /* reserved */
381 gxf_write_material_data_section(s);
382 gxf_write_track_description_section(s);
384 return updatePacketSize(pb, pos);
387 static int gxf_write_flt_packet(AVFormatContext *s)
389 GXFContext *gxf = s->priv_data;
390 AVIOContext *pb = s->pb;
391 int64_t pos = avio_tell(pb);
392 int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1;
393 int flt_entries = gxf->nb_fields / fields_per_flt;
396 gxf_write_packet_header(pb, PKT_FLT);
398 avio_wl32(pb, fields_per_flt); /* number of fields */
399 avio_wl32(pb, flt_entries); /* number of active flt entries */
401 if (gxf->flt_entries) {
402 for (i = 0; i < flt_entries; i++)
403 avio_wl32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]);
406 for (; i < 1000; i++)
409 return updatePacketSize(pb, pos);
412 static int gxf_write_umf_material_description(AVFormatContext *s)
414 GXFContext *gxf = s->priv_data;
415 AVIOContext *pb = s->pb;
416 int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
417 int64_t timestamp = 0;
418 AVDictionaryEntry *t;
420 uint32_t timecode_in; // timecode at mark in
421 uint32_t timecode_out; // timecode at mark out
423 if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
424 timestamp = ff_iso8601_to_unix_time(t->value);
426 timecode_in = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
427 gxf->tc.hh, gxf->tc.mm,
428 gxf->tc.ss, gxf->tc.ff);
430 nb_fields = gxf->nb_fields +
431 gxf->tc.hh * (timecode_base * 3600) +
432 gxf->tc.mm * (timecode_base * 60) +
433 gxf->tc.ss * timecode_base +
436 timecode_out = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
437 nb_fields / (timecode_base * 3600) % 24,
438 nb_fields / (timecode_base * 60) % 60,
439 nb_fields / timecode_base % 60,
440 nb_fields % timecode_base);
442 avio_wl32(pb, gxf->flags);
443 avio_wl32(pb, gxf->nb_fields); /* length of the longest track */
444 avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */
445 avio_wl32(pb, 0); /* mark in */
446 avio_wl32(pb, gxf->nb_fields); /* mark out */
447 avio_wl32(pb, timecode_in); /* timecode mark in */
448 avio_wl32(pb, timecode_out); /* timecode mark out */
449 avio_wl64(pb, timestamp); /* modification time */
450 avio_wl64(pb, timestamp); /* creation time */
451 avio_wl16(pb, 0); /* reserved */
452 avio_wl16(pb, 0); /* reserved */
453 avio_wl16(pb, gxf->audio_tracks);
454 avio_wl16(pb, 1); /* timecode track count */
455 avio_wl16(pb, 0); /* reserved */
456 avio_wl16(pb, gxf->mpeg_tracks);
460 static int gxf_write_umf_payload(AVFormatContext *s)
462 GXFContext *gxf = s->priv_data;
463 AVIOContext *pb = s->pb;
465 avio_wl32(pb, gxf->umf_length); /* total length of the umf data */
466 avio_wl32(pb, 3); /* version */
467 avio_wl32(pb, s->nb_streams+1);
468 avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */
469 avio_wl32(pb, gxf->umf_track_size);
470 avio_wl32(pb, s->nb_streams+1);
471 avio_wl32(pb, gxf->umf_media_offset);
472 avio_wl32(pb, gxf->umf_media_size);
473 avio_wl32(pb, gxf->umf_length); /* user data offset */
474 avio_wl32(pb, 0); /* user data size */
475 avio_wl32(pb, 0); /* reserved */
476 avio_wl32(pb, 0); /* reserved */
480 static int gxf_write_umf_track_description(AVFormatContext *s)
482 AVIOContext *pb = s->pb;
483 GXFContext *gxf = s->priv_data;
484 int64_t pos = avio_tell(pb);
487 gxf->umf_track_offset = pos - gxf->umf_start_offset;
488 for (i = 0; i < s->nb_streams; ++i) {
489 GXFStreamContext *sc = s->streams[i]->priv_data;
490 avio_wl16(pb, sc->media_info);
494 avio_wl16(pb, gxf->timecode_track.media_info);
497 return avio_tell(pb) - pos;
500 static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
502 GXFStreamContext *sc = st->priv_data;
504 if (st->codec->pix_fmt == PIX_FMT_YUV422P)
507 avio_wl32(pb, 1); /* default to 420 */
508 avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
509 avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
510 avio_wl32(pb, 1); /* I picture per GOP */
511 avio_wl32(pb, sc->p_per_gop);
512 avio_wl32(pb, sc->b_per_i_or_p);
513 if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO)
515 else if (st->codec->codec_id == CODEC_ID_MPEG1VIDEO)
519 avio_wl32(pb, 0); /* reserved */
523 static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop)
525 avio_wl32(pb, drop); /* drop frame */
526 avio_wl32(pb, 0); /* reserved */
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 */
536 static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc)
540 for (i = 0; i < 8; i++) {
546 static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
548 avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
549 avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
550 avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */
551 avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */
552 avio_wl32(pb, 0); /* reserved */
553 avio_wl32(pb, 0); /* reserved */
557 static int gxf_write_umf_media_description(AVFormatContext *s)
559 GXFContext *gxf = s->priv_data;
560 AVIOContext *pb = s->pb;
565 gxf->umf_media_offset = pos - gxf->umf_start_offset;
566 for (i = 0; i <= s->nb_streams; ++i) {
567 GXFStreamContext *sc;
568 int64_t startpos, curpos;
570 if (i == s->nb_streams)
571 sc = &gxf->timecode_track;
573 sc = s->streams[i]->priv_data;
575 startpos = avio_tell(pb);
576 avio_wl16(pb, 0); /* length */
577 avio_wl16(pb, sc->media_info);
578 avio_wl16(pb, 0); /* reserved */
579 avio_wl16(pb, 0); /* reserved */
580 avio_wl32(pb, gxf->nb_fields);
581 avio_wl32(pb, 0); /* attributes rw, ro */
582 avio_wl32(pb, 0); /* mark in */
583 avio_wl32(pb, gxf->nb_fields); /* mark out */
584 avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN));
585 avio_wb16(pb, sc->media_info);
586 for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++)
588 avio_wl32(pb, sc->track_type);
589 avio_wl32(pb, sc->sample_rate);
590 avio_wl32(pb, sc->sample_size);
591 avio_wl32(pb, 0); /* reserved */
593 if (sc == &gxf->timecode_track)
594 gxf_write_umf_media_timecode(pb, gxf->tc.drop);
596 AVStream *st = s->streams[i];
597 switch (st->codec->codec_id) {
598 case CODEC_ID_MPEG1VIDEO:
599 case CODEC_ID_MPEG2VIDEO:
600 gxf_write_umf_media_mpeg(pb, st);
602 case CODEC_ID_PCM_S16LE:
603 gxf_write_umf_media_audio(pb, sc);
605 case CODEC_ID_DVVIDEO:
606 gxf_write_umf_media_dv(pb, sc);
611 curpos = avio_tell(pb);
612 avio_seek(pb, startpos, SEEK_SET);
613 avio_wl16(pb, curpos - startpos);
614 avio_seek(pb, curpos, SEEK_SET);
616 return avio_tell(pb) - pos;
619 static int gxf_write_umf_packet(AVFormatContext *s)
621 GXFContext *gxf = s->priv_data;
622 AVIOContext *pb = s->pb;
623 int64_t pos = avio_tell(pb);
625 gxf_write_packet_header(pb, PKT_UMF);
628 avio_w8(pb, 3); /* first and last (only) packet */
629 avio_wb32(pb, gxf->umf_length); /* data length */
631 gxf->umf_start_offset = avio_tell(pb);
632 gxf_write_umf_payload(s);
633 gxf_write_umf_material_description(s);
634 gxf->umf_track_size = gxf_write_umf_track_description(s);
635 gxf->umf_media_size = gxf_write_umf_media_description(s);
636 gxf->umf_length = avio_tell(pb) - gxf->umf_start_offset;
637 return updatePacketSize(pb, pos);
640 static const int GXF_samples_per_frame[] = { 32768, 0 };
642 static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
647 sc->media_type = vsc->sample_rate == 60 ? 7 : 8;
648 sc->sample_rate = vsc->sample_rate;
649 sc->media_info = ('T'<<8) | '0';
651 sc->frame_rate_index = vsc->frame_rate_index;
652 sc->lines_index = vsc->lines_index;
653 sc->sample_size = 16;
654 sc->fields = vsc->fields;
657 static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields)
661 if (sscanf(tcstr, "%d:%d:%d%c%d", &tc->hh, &tc->mm, &tc->ss, &c, &tc->ff) != 5) {
662 av_log(s, AV_LOG_ERROR, "unable to parse timecode, "
663 "syntax: hh:mm:ss[:;.]ff\n");
676 static int gxf_write_header(AVFormatContext *s)
678 AVIOContext *pb = s->pb;
679 GXFContext *gxf = s->priv_data;
680 GXFStreamContext *vsc = NULL;
681 uint8_t tracks[255] = {0};
682 int i, media_info = 0;
683 AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
686 av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome");
690 gxf->flags |= 0x00080000; /* material is simple clip */
691 for (i = 0; i < s->nb_streams; ++i) {
692 AVStream *st = s->streams[i];
693 GXFStreamContext *sc = av_mallocz(sizeof(*sc));
695 return AVERROR(ENOMEM);
698 sc->media_type = ff_codec_get_tag(gxf_media_types, st->codec->codec_id);
699 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
700 if (st->codec->codec_id != CODEC_ID_PCM_S16LE) {
701 av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
704 if (st->codec->sample_rate != 48000) {
705 av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
708 if (st->codec->channels != 1) {
709 av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
713 sc->sample_rate = st->codec->sample_rate;
714 avpriv_set_pts_info(st, 64, 1, sc->sample_rate);
715 sc->sample_size = 16;
716 sc->frame_rate_index = -2;
717 sc->lines_index = -2;
720 gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
722 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
724 av_log(s, AV_LOG_ERROR, "video stream must be the first track\n");
727 /* FIXME check from time_base ? */
728 if (st->codec->height == 480 || st->codec->height == 512) { /* NTSC or NTSC+VBI */
729 sc->frame_rate_index = 5;
730 sc->sample_rate = 60;
731 gxf->flags |= 0x00000080;
732 gxf->time_base = (AVRational){ 1001, 60000 };
733 } else if (st->codec->height == 576 || st->codec->height == 608) { /* PAL or PAL+VBI */
734 sc->frame_rate_index = 6;
736 sc->sample_rate = 50;
737 gxf->flags |= 0x00000040;
738 gxf->time_base = (AVRational){ 1, 50 };
740 av_log(s, AV_LOG_ERROR, "unsupported video resolution, "
741 "gxf muxer only accepts PAL or NTSC resolutions currently\n");
745 tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
746 avpriv_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den);
747 if (gxf_find_lines_index(st) < 0)
748 sc->lines_index = -1;
749 sc->sample_size = st->codec->bit_rate;
750 sc->fields = 2; /* interlaced */
754 switch (st->codec->codec_id) {
757 gxf->flags |= 0x00004000;
760 case CODEC_ID_MPEG1VIDEO:
765 case CODEC_ID_MPEG2VIDEO:
766 sc->first_gop_closed = -1;
769 gxf->flags |= 0x00008000;
772 case CODEC_ID_DVVIDEO:
773 if (st->codec->pix_fmt == PIX_FMT_YUV422P) {
776 gxf->flags |= 0x00002000;
780 gxf->flags |= 0x00001000;
785 av_log(s, AV_LOG_ERROR, "video codec not supported\n");
789 /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
790 sc->media_info = media_info<<8 | ('0'+tracks[media_info]++);
791 sc->order = s->nb_streams - st->index;
794 if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0)
798 gxf_init_timecode(s, &gxf->tc, tcr->value, vsc->fields);
800 gxf_init_timecode_track(&gxf->timecode_track, vsc);
801 gxf->flags |= 0x200000; // time code track is non-drop frame
803 gxf_write_map_packet(s, 0);
804 gxf_write_flt_packet(s);
805 gxf_write_umf_packet(s);
807 gxf->packet_count = 3;
813 static int gxf_write_eos_packet(AVIOContext *pb)
815 int64_t pos = avio_tell(pb);
817 gxf_write_packet_header(pb, PKT_EOS);
818 return updatePacketSize(pb, pos);
821 static int gxf_write_trailer(AVFormatContext *s)
823 GXFContext *gxf = s->priv_data;
824 AVIOContext *pb = s->pb;
828 ff_audio_interleave_close(s);
830 gxf_write_eos_packet(pb);
832 avio_seek(pb, 0, SEEK_SET);
833 /* overwrite map, flt and umf packets with new values */
834 gxf_write_map_packet(s, 1);
835 gxf_write_flt_packet(s);
836 gxf_write_umf_packet(s);
838 /* update duration in all map packets */
839 for (i = 1; i < gxf->map_offsets_nb; i++) {
840 avio_seek(pb, gxf->map_offsets[i], SEEK_SET);
841 gxf_write_map_packet(s, 1);
845 avio_seek(pb, end, SEEK_SET);
847 av_freep(&gxf->flt_entries);
848 av_freep(&gxf->map_offsets);
853 static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
857 for(i=0; i<size-4 && c!=0x100; i++){
859 if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
860 sc->first_gop_closed= (buf[i+4]>>6)&1;
862 return (buf[i+1]>>3)&7;
865 static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
867 GXFContext *gxf = s->priv_data;
868 AVIOContext *pb = s->pb;
869 AVStream *st = s->streams[pkt->stream_index];
870 GXFStreamContext *sc = st->priv_data;
872 /* If the video is frame-encoded, the frame numbers shall be represented by
873 * even field numbers.
874 * see SMPTE360M-2004 6.4.2.1.3 Media field number */
875 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
876 field_nb = gxf->nb_fields;
878 field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
879 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
882 avio_w8(pb, sc->media_type);
883 avio_w8(pb, st->index);
884 avio_wb32(pb, field_nb);
885 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
887 avio_wb16(pb, size / 2);
888 } else if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
889 int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
890 if (frame_type == AV_PICTURE_TYPE_I) {
893 } else if (frame_type == AV_PICTURE_TYPE_B) {
901 } else if (st->codec->codec_id == CODEC_ID_DVVIDEO) {
902 avio_w8(pb, size / 4096);
906 avio_wb32(pb, field_nb);
907 avio_w8(pb, 1); /* flags */
908 avio_w8(pb, 0); /* reserved */
912 static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
914 GXFContext *gxf = s->priv_data;
915 AVIOContext *pb = s->pb;
916 AVStream *st = s->streams[pkt->stream_index];
917 int64_t pos = avio_tell(pb);
919 int packet_start_offset = avio_tell(pb) / 1024;
921 gxf_write_packet_header(pb, PKT_MEDIA);
922 if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
923 padding = 4 - pkt->size % 4;
924 else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
925 padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
926 gxf_write_media_preamble(s, pkt, pkt->size + padding);
927 avio_write(pb, pkt->data, pkt->size);
928 gxf_write_padding(pb, padding);
930 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
931 if (!(gxf->flt_entries_nb % 500)) {
932 gxf->flt_entries = av_realloc_f(gxf->flt_entries,
933 sizeof(*gxf->flt_entries),
934 gxf->flt_entries_nb+500);
935 if (!gxf->flt_entries) {
936 av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
940 gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset;
941 gxf->nb_fields += 2; // count fields
944 updatePacketSize(pb, pos);
947 if (gxf->packet_count == 100) {
948 gxf_write_map_packet(s, 0);
949 gxf->packet_count = 0;
957 static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur)
959 GXFContext *gxf = s->priv_data;
960 AVPacket *pkt[2] = { cur, next };
962 GXFStreamContext *sc[2];
964 for (i = 0; i < 2; i++) {
965 AVStream *st = s->streams[pkt[i]->stream_index];
966 sc[i] = st->priv_data;
967 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
968 field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den,
969 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
970 field_nb[i] &= ~1; // compare against even field number because audio must be before video
972 field_nb[i] = pkt[i]->dts; // dts are field based
975 return field_nb[1] > field_nb[0] ||
976 (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order);
979 static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
981 if (pkt && s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
982 pkt->duration = 2; // enforce 2 fields
983 return ff_audio_rechunk_interleave(s, out, pkt, flush,
984 ff_interleave_packet_per_dts, gxf_compare_field_nb);
987 AVOutputFormat ff_gxf_muxer = {
989 .long_name = NULL_IF_CONFIG_SMALL("GXF format"),
991 .priv_data_size = sizeof(GXFContext),
992 .audio_codec = CODEC_ID_PCM_S16LE,
993 .video_codec = CODEC_ID_MPEG2VIDEO,
994 .write_header = gxf_write_header,
995 .write_packet = gxf_write_packet,
996 .write_trailer = gxf_write_trailer,
997 .interleave_packet = gxf_interleave_packet,