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"
31 #include "audiointerleave.h"
33 #define GXF_AUDIO_PACKET_SIZE 65536
35 #define GXF_TIMECODE(c, d, h, m, s, f) \
36 ((c) << 30 | (d) << 29 | (h) << 24 | (m) << 16 | (s) << 8 | (f))
38 typedef struct GXFTimecode{
47 typedef struct GXFStreamContext {
48 AudioInterleaveContext aic;
61 int b_per_i_or_p; ///< number of B frames per I frame or P frame
63 unsigned order; ///< interleaving order
66 typedef struct GXFContext {
69 uint16_t audio_tracks;
71 int64_t creation_time;
72 uint32_t umf_start_offset;
73 uint32_t umf_track_offset;
74 uint32_t umf_media_offset;
76 uint16_t umf_track_size;
77 uint16_t umf_media_size;
80 GXFStreamContext timecode_track;
81 unsigned *flt_entries; ///< offsets of packets /1024, starts after 2nd video field
82 unsigned flt_entries_nb;
83 uint64_t *map_offsets; ///< offset of map packets
84 unsigned map_offsets_nb;
85 unsigned packet_count;
92 { 480, 1 }, /* NTSC */
93 { 512, 1 }, /* NTSC + VBI */
95 { 608, 2 }, /* PAL + VBI */
100 static const AVCodecTag gxf_media_types[] = {
101 { AV_CODEC_ID_MJPEG , 3 }, /* NTSC */
102 { AV_CODEC_ID_MJPEG , 4 }, /* PAL */
103 { AV_CODEC_ID_PCM_S24LE , 9 },
104 { AV_CODEC_ID_PCM_S16LE , 10 },
105 { AV_CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */
106 { AV_CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */
107 { AV_CODEC_ID_DVVIDEO , 13 }, /* NTSC */
108 { AV_CODEC_ID_DVVIDEO , 14 }, /* PAL */
109 { AV_CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */
110 { AV_CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */
111 { AV_CODEC_ID_AC3 , 17 },
112 //{ AV_CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */
113 { AV_CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */
114 { AV_CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */
115 { AV_CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */
116 { AV_CODEC_ID_NONE, 0 },
119 #define SERVER_PATH "EXT:/PDR/default/"
120 #define ES_NAME_PATTERN "EXT:/PDR/default/ES."
122 static int gxf_find_lines_index(AVStream *st)
124 GXFStreamContext *sc = st->priv_data;
127 for (i = 0; i < 6; ++i) {
128 if (st->codec->height == gxf_lines_tab[i].height) {
129 sc->lines_index = gxf_lines_tab[i].index;
136 static void gxf_write_padding(AVIOContext *pb, int64_t to_pad)
138 for (; to_pad > 0; to_pad--) {
143 static int64_t updatePacketSize(AVIOContext *pb, int64_t pos)
148 size = avio_tell(pb) - pos;
150 gxf_write_padding(pb, 4 - size % 4);
151 size = avio_tell(pb) - pos;
153 curpos = avio_tell(pb);
154 avio_seek(pb, pos + 6, SEEK_SET);
156 avio_seek(pb, curpos, SEEK_SET);
160 static int64_t updateSize(AVIOContext *pb, int64_t pos)
164 curpos = avio_tell(pb);
165 avio_seek(pb, pos, SEEK_SET);
166 avio_wb16(pb, curpos - pos - 2);
167 avio_seek(pb, curpos, SEEK_SET);
171 static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type)
173 avio_wb32(pb, 0); /* packet leader for synchro */
175 avio_w8(pb, type); /* map packet */
176 avio_wb32(pb, 0); /* size */
177 avio_wb32(pb, 0); /* reserved */
178 avio_w8(pb, 0xE1); /* trailer 1 */
179 avio_w8(pb, 0xE2); /* trailer 2 */
182 static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st)
184 GXFStreamContext *sc = st->priv_data;
186 int size, starting_line;
189 sc->p_per_gop = sc->pframes / sc->iframes;
190 if (sc->pframes % sc->iframes)
193 sc->b_per_i_or_p = sc->bframes / sc->pframes;
194 if (sc->bframes % sc->pframes)
197 if (sc->p_per_gop > 9)
198 sc->p_per_gop = 9; /* ensure value won't take more than one char */
199 if (sc->b_per_i_or_p > 9)
200 sc->b_per_i_or_p = 9; /* ensure value won't take more than one char */
202 if (st->codec->height == 512 || st->codec->height == 608)
203 starting_line = 7; // VBI
204 else if (st->codec->height == 480)
207 starting_line = 23; // default PAL
209 size = snprintf(buffer, sizeof(buffer), "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
210 "Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n",
211 (float)st->codec->bit_rate, sc->p_per_gop, sc->b_per_i_or_p,
212 st->codec->pix_fmt == AV_PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
213 starting_line, (st->codec->height + 15) / 16);
214 av_assert0(size < sizeof(buffer));
215 avio_w8(pb, TRACK_MPG_AUX);
216 avio_w8(pb, size + 1);
217 avio_write(pb, (uint8_t *)buffer, size + 1);
221 static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFContext *gxf)
223 uint32_t timecode = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
224 gxf->tc.hh, gxf->tc.mm,
225 gxf->tc.ss, gxf->tc.ff);
227 avio_wl32(pb, timecode);
233 static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
235 GXFContext *gxf = s->priv_data;
236 AVIOContext *pb = s->pb;
238 int mpeg = sc->track_type == 4 || sc->track_type == 9;
240 /* track description section */
241 avio_w8(pb, sc->media_type + 0x80);
242 avio_w8(pb, index + 0xC0);
245 avio_wb16(pb, 0); /* size */
247 /* media file name */
248 avio_w8(pb, TRACK_NAME);
249 avio_w8(pb, strlen(ES_NAME_PATTERN) + 3);
250 avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1);
251 avio_wb16(pb, sc->media_info);
255 /* auxiliary information */
256 avio_w8(pb, TRACK_AUX);
258 if (sc->track_type == 3)
259 gxf_write_timecode_auxiliary(pb, gxf);
264 /* file system version */
265 avio_w8(pb, TRACK_VER);
270 gxf_write_mpeg_auxiliary(pb, s->streams[index]);
273 avio_w8(pb, TRACK_FPS);
275 avio_wb32(pb, sc->frame_rate_index);
277 /* lines per frame */
278 avio_w8(pb, TRACK_LINES);
280 avio_wb32(pb, sc->lines_index);
282 /* fields per frame */
283 avio_w8(pb, TRACK_FPF);
285 avio_wb32(pb, sc->fields);
287 return updateSize(pb, pos);
290 static int gxf_write_material_data_section(AVFormatContext *s)
292 GXFContext *gxf = s->priv_data;
293 AVIOContext *pb = s->pb;
296 const char *filename = strrchr(s->filename, '/');
299 avio_wb16(pb, 0); /* size */
305 filename = s->filename;
306 len = strlen(filename);
308 avio_w8(pb, MAT_NAME);
309 avio_w8(pb, strlen(SERVER_PATH) + len + 1);
310 avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1);
311 avio_write(pb, filename, len);
315 avio_w8(pb, MAT_FIRST_FIELD);
320 avio_w8(pb, MAT_LAST_FIELD);
322 avio_wb32(pb, gxf->nb_fields);
325 avio_w8(pb, MAT_MARK_IN);
329 avio_w8(pb, MAT_MARK_OUT);
331 avio_wb32(pb, gxf->nb_fields);
334 avio_w8(pb, MAT_SIZE);
336 avio_wb32(pb, avio_size(pb) / 1024);
338 return updateSize(pb, pos);
341 static int gxf_write_track_description_section(AVFormatContext *s)
343 GXFContext *gxf = s->priv_data;
344 AVIOContext *pb = s->pb;
349 avio_wb16(pb, 0); /* size */
350 for (i = 0; i < s->nb_streams; ++i)
351 gxf_write_track_description(s, s->streams[i]->priv_data, i);
353 gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams);
355 return updateSize(pb, pos);
358 static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
360 GXFContext *gxf = s->priv_data;
361 AVIOContext *pb = s->pb;
362 int64_t pos = avio_tell(pb);
365 if (!(gxf->map_offsets_nb % 30)) {
366 gxf->map_offsets = av_realloc_f(gxf->map_offsets,
367 sizeof(*gxf->map_offsets),
368 gxf->map_offsets_nb+30);
369 if (!gxf->map_offsets) {
370 av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n");
374 gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here
377 gxf_write_packet_header(pb, PKT_MAP);
380 avio_w8(pb, 0xE0); /* version */
381 avio_w8(pb, 0xFF); /* reserved */
383 gxf_write_material_data_section(s);
384 gxf_write_track_description_section(s);
386 return updatePacketSize(pb, pos);
389 static int gxf_write_flt_packet(AVFormatContext *s)
391 GXFContext *gxf = s->priv_data;
392 AVIOContext *pb = s->pb;
393 int64_t pos = avio_tell(pb);
394 int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1;
395 int flt_entries = gxf->nb_fields / fields_per_flt;
398 gxf_write_packet_header(pb, PKT_FLT);
400 avio_wl32(pb, fields_per_flt); /* number of fields */
401 avio_wl32(pb, flt_entries); /* number of active flt entries */
403 if (gxf->flt_entries) {
404 for (i = 0; i < flt_entries; i++)
405 avio_wl32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]);
408 for (; i < 1000; i++)
411 return updatePacketSize(pb, pos);
414 static int gxf_write_umf_material_description(AVFormatContext *s)
416 GXFContext *gxf = s->priv_data;
417 AVIOContext *pb = s->pb;
418 int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
419 int64_t timestamp = 0;
420 AVDictionaryEntry *t;
422 uint32_t timecode_in; // timecode at mark in
423 uint32_t timecode_out; // timecode at mark out
425 if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
426 timestamp = ff_iso8601_to_unix_time(t->value);
428 timecode_in = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
429 gxf->tc.hh, gxf->tc.mm,
430 gxf->tc.ss, gxf->tc.ff);
432 nb_fields = gxf->nb_fields +
433 gxf->tc.hh * (timecode_base * 3600) +
434 gxf->tc.mm * (timecode_base * 60) +
435 gxf->tc.ss * timecode_base +
438 timecode_out = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
439 nb_fields / (timecode_base * 3600) % 24,
440 nb_fields / (timecode_base * 60) % 60,
441 nb_fields / timecode_base % 60,
442 nb_fields % timecode_base);
444 avio_wl32(pb, gxf->flags);
445 avio_wl32(pb, gxf->nb_fields); /* length of the longest track */
446 avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */
447 avio_wl32(pb, 0); /* mark in */
448 avio_wl32(pb, gxf->nb_fields); /* mark out */
449 avio_wl32(pb, timecode_in); /* timecode mark in */
450 avio_wl32(pb, timecode_out); /* timecode mark out */
451 avio_wl64(pb, timestamp); /* modification time */
452 avio_wl64(pb, timestamp); /* creation time */
453 avio_wl16(pb, 0); /* reserved */
454 avio_wl16(pb, 0); /* reserved */
455 avio_wl16(pb, gxf->audio_tracks);
456 avio_wl16(pb, 1); /* timecode track count */
457 avio_wl16(pb, 0); /* reserved */
458 avio_wl16(pb, gxf->mpeg_tracks);
462 static int gxf_write_umf_payload(AVFormatContext *s)
464 GXFContext *gxf = s->priv_data;
465 AVIOContext *pb = s->pb;
467 avio_wl32(pb, gxf->umf_length); /* total length of the umf data */
468 avio_wl32(pb, 3); /* version */
469 avio_wl32(pb, s->nb_streams+1);
470 avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */
471 avio_wl32(pb, gxf->umf_track_size);
472 avio_wl32(pb, s->nb_streams+1);
473 avio_wl32(pb, gxf->umf_media_offset);
474 avio_wl32(pb, gxf->umf_media_size);
475 avio_wl32(pb, gxf->umf_length); /* user data offset */
476 avio_wl32(pb, 0); /* user data size */
477 avio_wl32(pb, 0); /* reserved */
478 avio_wl32(pb, 0); /* reserved */
482 static int gxf_write_umf_track_description(AVFormatContext *s)
484 AVIOContext *pb = s->pb;
485 GXFContext *gxf = s->priv_data;
486 int64_t pos = avio_tell(pb);
489 gxf->umf_track_offset = pos - gxf->umf_start_offset;
490 for (i = 0; i < s->nb_streams; ++i) {
491 GXFStreamContext *sc = s->streams[i]->priv_data;
492 avio_wl16(pb, sc->media_info);
496 avio_wl16(pb, gxf->timecode_track.media_info);
499 return avio_tell(pb) - pos;
502 static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
504 GXFStreamContext *sc = st->priv_data;
506 if (st->codec->pix_fmt == AV_PIX_FMT_YUV422P)
509 avio_wl32(pb, 1); /* default to 420 */
510 avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
511 avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
512 avio_wl32(pb, 1); /* I picture per GOP */
513 avio_wl32(pb, sc->p_per_gop);
514 avio_wl32(pb, sc->b_per_i_or_p);
515 if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO)
517 else if (st->codec->codec_id == AV_CODEC_ID_MPEG1VIDEO)
521 avio_wl32(pb, 0); /* reserved */
525 static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop)
527 avio_wl32(pb, drop); /* drop frame */
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 */
534 avio_wl32(pb, 0); /* reserved */
538 static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc)
542 for (i = 0; i < 8; i++) {
548 static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
550 avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
551 avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
552 avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */
553 avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */
554 avio_wl32(pb, 0); /* reserved */
555 avio_wl32(pb, 0); /* reserved */
559 static int gxf_write_umf_media_description(AVFormatContext *s)
561 GXFContext *gxf = s->priv_data;
562 AVIOContext *pb = s->pb;
567 gxf->umf_media_offset = pos - gxf->umf_start_offset;
568 for (i = 0; i <= s->nb_streams; ++i) {
569 GXFStreamContext *sc;
570 int64_t startpos, curpos;
572 if (i == s->nb_streams)
573 sc = &gxf->timecode_track;
575 sc = s->streams[i]->priv_data;
577 startpos = avio_tell(pb);
578 avio_wl16(pb, 0); /* length */
579 avio_wl16(pb, sc->media_info);
580 avio_wl16(pb, 0); /* reserved */
581 avio_wl16(pb, 0); /* reserved */
582 avio_wl32(pb, gxf->nb_fields);
583 avio_wl32(pb, 0); /* attributes rw, ro */
584 avio_wl32(pb, 0); /* mark in */
585 avio_wl32(pb, gxf->nb_fields); /* mark out */
586 avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN));
587 avio_wb16(pb, sc->media_info);
588 for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++)
590 avio_wl32(pb, sc->track_type);
591 avio_wl32(pb, sc->sample_rate);
592 avio_wl32(pb, sc->sample_size);
593 avio_wl32(pb, 0); /* reserved */
595 if (sc == &gxf->timecode_track)
596 gxf_write_umf_media_timecode(pb, gxf->tc.drop);
598 AVStream *st = s->streams[i];
599 switch (st->codec->codec_id) {
600 case AV_CODEC_ID_MPEG1VIDEO:
601 case AV_CODEC_ID_MPEG2VIDEO:
602 gxf_write_umf_media_mpeg(pb, st);
604 case AV_CODEC_ID_PCM_S16LE:
605 gxf_write_umf_media_audio(pb, sc);
607 case AV_CODEC_ID_DVVIDEO:
608 gxf_write_umf_media_dv(pb, sc);
613 curpos = avio_tell(pb);
614 avio_seek(pb, startpos, SEEK_SET);
615 avio_wl16(pb, curpos - startpos);
616 avio_seek(pb, curpos, SEEK_SET);
618 return avio_tell(pb) - pos;
621 static int gxf_write_umf_packet(AVFormatContext *s)
623 GXFContext *gxf = s->priv_data;
624 AVIOContext *pb = s->pb;
625 int64_t pos = avio_tell(pb);
627 gxf_write_packet_header(pb, PKT_UMF);
630 avio_w8(pb, 3); /* first and last (only) packet */
631 avio_wb32(pb, gxf->umf_length); /* data length */
633 gxf->umf_start_offset = avio_tell(pb);
634 gxf_write_umf_payload(s);
635 gxf_write_umf_material_description(s);
636 gxf->umf_track_size = gxf_write_umf_track_description(s);
637 gxf->umf_media_size = gxf_write_umf_media_description(s);
638 gxf->umf_length = avio_tell(pb) - gxf->umf_start_offset;
639 return updatePacketSize(pb, pos);
642 static const int GXF_samples_per_frame[] = { 32768, 0 };
644 static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
649 sc->media_type = vsc->sample_rate == 60 ? 7 : 8;
650 sc->sample_rate = vsc->sample_rate;
651 sc->media_info = ('T'<<8) | '0';
653 sc->frame_rate_index = vsc->frame_rate_index;
654 sc->lines_index = vsc->lines_index;
655 sc->sample_size = 16;
656 sc->fields = vsc->fields;
659 static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields)
663 if (sscanf(tcstr, "%d:%d:%d%c%d", &tc->hh, &tc->mm, &tc->ss, &c, &tc->ff) != 5) {
664 av_log(s, AV_LOG_ERROR, "unable to parse timecode, "
665 "syntax: hh:mm:ss[:;.]ff\n");
678 static int gxf_write_header(AVFormatContext *s)
680 AVIOContext *pb = s->pb;
681 GXFContext *gxf = s->priv_data;
682 GXFStreamContext *vsc = NULL;
683 uint8_t tracks[255] = {0};
684 int i, media_info = 0;
685 AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
688 av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome\n");
692 gxf->flags |= 0x00080000; /* material is simple clip */
693 for (i = 0; i < s->nb_streams; ++i) {
694 AVStream *st = s->streams[i];
695 GXFStreamContext *sc = av_mallocz(sizeof(*sc));
697 return AVERROR(ENOMEM);
700 sc->media_type = ff_codec_get_tag(gxf_media_types, st->codec->codec_id);
701 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
702 if (st->codec->codec_id != AV_CODEC_ID_PCM_S16LE) {
703 av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
706 if (st->codec->sample_rate != 48000) {
707 av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
710 if (st->codec->channels != 1) {
711 av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
715 sc->sample_rate = st->codec->sample_rate;
716 avpriv_set_pts_info(st, 64, 1, sc->sample_rate);
717 sc->sample_size = 16;
718 sc->frame_rate_index = -2;
719 sc->lines_index = -2;
722 gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
724 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
726 av_log(s, AV_LOG_ERROR, "video stream must be the first track\n");
729 /* FIXME check from time_base ? */
730 if (st->codec->height == 480 || st->codec->height == 512) { /* NTSC or NTSC+VBI */
731 sc->frame_rate_index = 5;
732 sc->sample_rate = 60;
733 gxf->flags |= 0x00000080;
734 gxf->time_base = (AVRational){ 1001, 60000 };
735 } else if (st->codec->height == 576 || st->codec->height == 608) { /* PAL or PAL+VBI */
736 sc->frame_rate_index = 6;
738 sc->sample_rate = 50;
739 gxf->flags |= 0x00000040;
740 gxf->time_base = (AVRational){ 1, 50 };
742 av_log(s, AV_LOG_ERROR, "unsupported video resolution, "
743 "gxf muxer only accepts PAL or NTSC resolutions currently\n");
747 tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
748 avpriv_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den);
749 if (gxf_find_lines_index(st) < 0)
750 sc->lines_index = -1;
751 sc->sample_size = st->codec->bit_rate;
752 sc->fields = 2; /* interlaced */
756 switch (st->codec->codec_id) {
757 case AV_CODEC_ID_MJPEG:
759 gxf->flags |= 0x00004000;
762 case AV_CODEC_ID_MPEG1VIDEO:
767 case AV_CODEC_ID_MPEG2VIDEO:
768 sc->first_gop_closed = -1;
771 gxf->flags |= 0x00008000;
774 case AV_CODEC_ID_DVVIDEO:
775 if (st->codec->pix_fmt == AV_PIX_FMT_YUV422P) {
778 gxf->flags |= 0x00002000;
782 gxf->flags |= 0x00001000;
787 av_log(s, AV_LOG_ERROR, "video codec not supported\n");
791 /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
792 sc->media_info = media_info<<8 | ('0'+tracks[media_info]++);
793 sc->order = s->nb_streams - st->index;
796 if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0)
800 gxf_init_timecode(s, &gxf->tc, tcr->value, vsc->fields);
802 gxf_init_timecode_track(&gxf->timecode_track, vsc);
803 gxf->flags |= 0x200000; // time code track is non-drop frame
805 gxf_write_map_packet(s, 0);
806 gxf_write_flt_packet(s);
807 gxf_write_umf_packet(s);
809 gxf->packet_count = 3;
815 static int gxf_write_eos_packet(AVIOContext *pb)
817 int64_t pos = avio_tell(pb);
819 gxf_write_packet_header(pb, PKT_EOS);
820 return updatePacketSize(pb, pos);
823 static int gxf_write_trailer(AVFormatContext *s)
825 GXFContext *gxf = s->priv_data;
826 AVIOContext *pb = s->pb;
830 ff_audio_interleave_close(s);
832 gxf_write_eos_packet(pb);
834 avio_seek(pb, 0, SEEK_SET);
835 /* overwrite map, flt and umf packets with new values */
836 gxf_write_map_packet(s, 1);
837 gxf_write_flt_packet(s);
838 gxf_write_umf_packet(s);
840 /* update duration in all map packets */
841 for (i = 1; i < gxf->map_offsets_nb; i++) {
842 avio_seek(pb, gxf->map_offsets[i], SEEK_SET);
843 gxf_write_map_packet(s, 1);
847 avio_seek(pb, end, SEEK_SET);
849 av_freep(&gxf->flt_entries);
850 av_freep(&gxf->map_offsets);
855 static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
859 for(i=0; i<size-4 && c!=0x100; i++){
861 if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
862 sc->first_gop_closed= (buf[i+4]>>6)&1;
864 return (buf[i+1]>>3)&7;
867 static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
869 GXFContext *gxf = s->priv_data;
870 AVIOContext *pb = s->pb;
871 AVStream *st = s->streams[pkt->stream_index];
872 GXFStreamContext *sc = st->priv_data;
874 /* If the video is frame-encoded, the frame numbers shall be represented by
875 * even field numbers.
876 * see SMPTE360M-2004 6.4.2.1.3 Media field number */
877 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
878 field_nb = gxf->nb_fields;
880 field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
881 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
884 avio_w8(pb, sc->media_type);
885 avio_w8(pb, st->index);
886 avio_wb32(pb, field_nb);
887 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
889 avio_wb16(pb, size / 2);
890 } else if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
891 int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
892 if (frame_type == AV_PICTURE_TYPE_I) {
895 } else if (frame_type == AV_PICTURE_TYPE_B) {
903 } else if (st->codec->codec_id == AV_CODEC_ID_DVVIDEO) {
904 avio_w8(pb, size / 4096);
908 avio_wb32(pb, field_nb);
909 avio_w8(pb, 1); /* flags */
910 avio_w8(pb, 0); /* reserved */
914 static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
916 GXFContext *gxf = s->priv_data;
917 AVIOContext *pb = s->pb;
918 AVStream *st = s->streams[pkt->stream_index];
919 int64_t pos = avio_tell(pb);
921 int packet_start_offset = avio_tell(pb) / 1024;
923 gxf_write_packet_header(pb, PKT_MEDIA);
924 if (st->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
925 padding = 4 - pkt->size % 4;
926 else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
927 padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
928 gxf_write_media_preamble(s, pkt, pkt->size + padding);
929 avio_write(pb, pkt->data, pkt->size);
930 gxf_write_padding(pb, padding);
932 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
933 if (!(gxf->flt_entries_nb % 500)) {
934 gxf->flt_entries = av_realloc_f(gxf->flt_entries,
935 sizeof(*gxf->flt_entries),
936 gxf->flt_entries_nb+500);
937 if (!gxf->flt_entries) {
938 av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
942 gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset;
943 gxf->nb_fields += 2; // count fields
946 updatePacketSize(pb, pos);
949 if (gxf->packet_count == 100) {
950 gxf_write_map_packet(s, 0);
951 gxf->packet_count = 0;
959 static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur)
961 GXFContext *gxf = s->priv_data;
962 AVPacket *pkt[2] = { cur, next };
964 GXFStreamContext *sc[2];
966 for (i = 0; i < 2; i++) {
967 AVStream *st = s->streams[pkt[i]->stream_index];
968 sc[i] = st->priv_data;
969 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
970 field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den,
971 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
972 field_nb[i] &= ~1; // compare against even field number because audio must be before video
974 field_nb[i] = pkt[i]->dts; // dts are field based
977 return field_nb[1] > field_nb[0] ||
978 (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order);
981 static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
983 if (pkt && s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
984 pkt->duration = 2; // enforce 2 fields
985 return ff_audio_rechunk_interleave(s, out, pkt, flush,
986 ff_interleave_packet_per_dts, gxf_compare_field_nb);
989 AVOutputFormat ff_gxf_muxer = {
991 .long_name = NULL_IF_CONFIG_SMALL("GXF (General eXchange Format)"),
993 .priv_data_size = sizeof(GXFContext),
994 .audio_codec = AV_CODEC_ID_PCM_S16LE,
995 .video_codec = AV_CODEC_ID_MPEG2VIDEO,
996 .write_header = gxf_write_header,
997 .write_packet = gxf_write_packet,
998 .write_trailer = gxf_write_trailer,
999 .interleave_packet = gxf_interleave_packet,