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 "libavcodec/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{
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 { CODEC_ID_MJPEG , 3 }, /* NTSC */
102 { CODEC_ID_MJPEG , 4 }, /* PAL */
103 { CODEC_ID_PCM_S24LE , 9 },
104 { CODEC_ID_PCM_S16LE , 10 },
105 { CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */
106 { CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */
107 { CODEC_ID_DVVIDEO , 13 }, /* NTSC */
108 { CODEC_ID_DVVIDEO , 14 }, /* PAL */
109 { CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */
110 { CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */
111 { CODEC_ID_AC3 , 17 },
112 //{ CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */
113 { CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */
114 { CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */
115 { CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */
116 { 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, 1024, "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 == PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
213 starting_line, (st->codec->height + 15) / 16);
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
426 timestamp = s->timestamp;
429 if (t = av_dict_get(s->metadata, "creation_time", NULL, 0))
430 timestamp = ff_iso8601_to_unix_time(t->value);
432 timecode_in = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
433 gxf->tc.hh, gxf->tc.mm,
434 gxf->tc.ss, gxf->tc.ff);
436 nb_fields = gxf->nb_fields +
437 gxf->tc.hh * (timecode_base * 3600) +
438 gxf->tc.mm * (timecode_base * 60) +
439 gxf->tc.ss * timecode_base +
442 timecode_out = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
443 nb_fields / (timecode_base * 3600) % 24,
444 nb_fields / (timecode_base * 60) % 60,
445 nb_fields / timecode_base % 60,
446 nb_fields % timecode_base);
448 avio_wl32(pb, gxf->flags);
449 avio_wl32(pb, gxf->nb_fields); /* length of the longest track */
450 avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */
451 avio_wl32(pb, 0); /* mark in */
452 avio_wl32(pb, gxf->nb_fields); /* mark out */
453 avio_wl32(pb, timecode_in); /* timecode mark in */
454 avio_wl32(pb, timecode_out); /* timecode mark out */
455 avio_wl64(pb, timestamp); /* modification time */
456 avio_wl64(pb, timestamp); /* creation time */
457 avio_wl16(pb, 0); /* reserved */
458 avio_wl16(pb, 0); /* reserved */
459 avio_wl16(pb, gxf->audio_tracks);
460 avio_wl16(pb, 1); /* timecode track count */
461 avio_wl16(pb, 0); /* reserved */
462 avio_wl16(pb, gxf->mpeg_tracks);
466 static int gxf_write_umf_payload(AVFormatContext *s)
468 GXFContext *gxf = s->priv_data;
469 AVIOContext *pb = s->pb;
471 avio_wl32(pb, gxf->umf_length); /* total length of the umf data */
472 avio_wl32(pb, 3); /* version */
473 avio_wl32(pb, s->nb_streams+1);
474 avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */
475 avio_wl32(pb, gxf->umf_track_size);
476 avio_wl32(pb, s->nb_streams+1);
477 avio_wl32(pb, gxf->umf_media_offset);
478 avio_wl32(pb, gxf->umf_media_size);
479 avio_wl32(pb, gxf->umf_length); /* user data offset */
480 avio_wl32(pb, 0); /* user data size */
481 avio_wl32(pb, 0); /* reserved */
482 avio_wl32(pb, 0); /* reserved */
486 static int gxf_write_umf_track_description(AVFormatContext *s)
488 AVIOContext *pb = s->pb;
489 GXFContext *gxf = s->priv_data;
490 int64_t pos = avio_tell(pb);
493 gxf->umf_track_offset = pos - gxf->umf_start_offset;
494 for (i = 0; i < s->nb_streams; ++i) {
495 GXFStreamContext *sc = s->streams[i]->priv_data;
496 avio_wl16(pb, sc->media_info);
500 avio_wl16(pb, gxf->timecode_track.media_info);
503 return avio_tell(pb) - pos;
506 static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
508 GXFStreamContext *sc = st->priv_data;
510 if (st->codec->pix_fmt == PIX_FMT_YUV422P)
513 avio_wl32(pb, 1); /* default to 420 */
514 avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
515 avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
516 avio_wl32(pb, 1); /* I picture per GOP */
517 avio_wl32(pb, sc->p_per_gop);
518 avio_wl32(pb, sc->b_per_i_or_p);
519 if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO)
521 else if (st->codec->codec_id == CODEC_ID_MPEG1VIDEO)
525 avio_wl32(pb, 0); /* reserved */
529 static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop)
531 avio_wl32(pb, drop); /* drop frame */
532 avio_wl32(pb, 0); /* reserved */
533 avio_wl32(pb, 0); /* reserved */
534 avio_wl32(pb, 0); /* reserved */
535 avio_wl32(pb, 0); /* reserved */
536 avio_wl32(pb, 0); /* reserved */
537 avio_wl32(pb, 0); /* reserved */
538 avio_wl32(pb, 0); /* reserved */
542 static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc)
546 for (i = 0; i < 8; i++) {
552 static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
554 avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
555 avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
556 avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */
557 avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */
558 avio_wl32(pb, 0); /* reserved */
559 avio_wl32(pb, 0); /* reserved */
564 static int gxf_write_umf_media_mjpeg(AVIOContext *pb, GXFStreamContext *sc)
566 avio_wb64(pb, 0); /* FIXME FLOAT max chroma quant level */
567 avio_wb64(pb, 0); /* FIXME FLOAT max luma quant level */
568 avio_wb64(pb, 0); /* FIXME FLOAT min chroma quant level */
569 avio_wb64(pb, 0); /* FIXME FLOAT min luma quant level */
574 static int gxf_write_umf_media_description(AVFormatContext *s)
576 GXFContext *gxf = s->priv_data;
577 AVIOContext *pb = s->pb;
582 gxf->umf_media_offset = pos - gxf->umf_start_offset;
583 for (i = 0; i <= s->nb_streams; ++i) {
584 GXFStreamContext *sc;
585 int64_t startpos, curpos;
587 if (i == s->nb_streams)
588 sc = &gxf->timecode_track;
590 sc = s->streams[i]->priv_data;
592 startpos = avio_tell(pb);
593 avio_wl16(pb, 0); /* length */
594 avio_wl16(pb, sc->media_info);
595 avio_wl16(pb, 0); /* reserved */
596 avio_wl16(pb, 0); /* reserved */
597 avio_wl32(pb, gxf->nb_fields);
598 avio_wl32(pb, 0); /* attributes rw, ro */
599 avio_wl32(pb, 0); /* mark in */
600 avio_wl32(pb, gxf->nb_fields); /* mark out */
601 avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN));
602 avio_wb16(pb, sc->media_info);
603 for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++)
605 avio_wl32(pb, sc->track_type);
606 avio_wl32(pb, sc->sample_rate);
607 avio_wl32(pb, sc->sample_size);
608 avio_wl32(pb, 0); /* reserved */
610 if (sc == &gxf->timecode_track)
611 gxf_write_umf_media_timecode(pb, gxf->tc.drop);
613 AVStream *st = s->streams[i];
614 switch (st->codec->codec_id) {
615 case CODEC_ID_MPEG1VIDEO:
616 case CODEC_ID_MPEG2VIDEO:
617 gxf_write_umf_media_mpeg(pb, st);
619 case CODEC_ID_PCM_S16LE:
620 gxf_write_umf_media_audio(pb, sc);
622 case CODEC_ID_DVVIDEO:
623 gxf_write_umf_media_dv(pb, sc);
628 curpos = avio_tell(pb);
629 avio_seek(pb, startpos, SEEK_SET);
630 avio_wl16(pb, curpos - startpos);
631 avio_seek(pb, curpos, SEEK_SET);
633 return avio_tell(pb) - pos;
636 static int gxf_write_umf_packet(AVFormatContext *s)
638 GXFContext *gxf = s->priv_data;
639 AVIOContext *pb = s->pb;
640 int64_t pos = avio_tell(pb);
642 gxf_write_packet_header(pb, PKT_UMF);
645 avio_w8(pb, 3); /* first and last (only) packet */
646 avio_wb32(pb, gxf->umf_length); /* data length */
648 gxf->umf_start_offset = avio_tell(pb);
649 gxf_write_umf_payload(s);
650 gxf_write_umf_material_description(s);
651 gxf->umf_track_size = gxf_write_umf_track_description(s);
652 gxf->umf_media_size = gxf_write_umf_media_description(s);
653 gxf->umf_length = avio_tell(pb) - gxf->umf_start_offset;
654 return updatePacketSize(pb, pos);
657 static const int GXF_samples_per_frame[] = { 32768, 0 };
659 static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
664 sc->media_type = vsc->sample_rate == 60 ? 7 : 8;
665 sc->sample_rate = vsc->sample_rate;
666 sc->media_info = ('T'<<8) | '0';
668 sc->frame_rate_index = vsc->frame_rate_index;
669 sc->lines_index = vsc->lines_index;
670 sc->sample_size = 16;
671 sc->fields = vsc->fields;
674 static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, int fields)
678 if (sscanf(tc->str, "%d:%d:%d%c%d", &tc->hh, &tc->mm, &tc->ss, &c, &tc->ff) != 5) {
679 av_log(s, AV_LOG_ERROR, "unable to parse timecode, "
680 "syntax: hh:mm:ss[:;.]ff\n");
693 static int gxf_write_header(AVFormatContext *s)
695 AVIOContext *pb = s->pb;
696 GXFContext *gxf = s->priv_data;
697 GXFStreamContext *vsc = NULL;
698 uint8_t tracks[255] = {0};
699 int i, media_info = 0;
702 av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome");
706 gxf->flags |= 0x00080000; /* material is simple clip */
707 for (i = 0; i < s->nb_streams; ++i) {
708 AVStream *st = s->streams[i];
709 GXFStreamContext *sc = av_mallocz(sizeof(*sc));
711 return AVERROR(ENOMEM);
714 sc->media_type = ff_codec_get_tag(gxf_media_types, st->codec->codec_id);
715 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
716 if (st->codec->codec_id != CODEC_ID_PCM_S16LE) {
717 av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
720 if (st->codec->sample_rate != 48000) {
721 av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
724 if (st->codec->channels != 1) {
725 av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
729 sc->sample_rate = st->codec->sample_rate;
730 avpriv_set_pts_info(st, 64, 1, sc->sample_rate);
731 sc->sample_size = 16;
732 sc->frame_rate_index = -2;
733 sc->lines_index = -2;
736 gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
738 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
740 av_log(s, AV_LOG_ERROR, "video stream must be the first track\n");
743 /* FIXME check from time_base ? */
744 if (st->codec->height == 480 || st->codec->height == 512) { /* NTSC or NTSC+VBI */
745 sc->frame_rate_index = 5;
746 sc->sample_rate = 60;
747 gxf->flags |= 0x00000080;
748 gxf->time_base = (AVRational){ 1001, 60000 };
749 } else if (st->codec->height == 576 || st->codec->height == 608) { /* PAL or PAL+VBI */
750 sc->frame_rate_index = 6;
752 sc->sample_rate = 50;
753 gxf->flags |= 0x00000040;
754 gxf->time_base = (AVRational){ 1, 50 };
756 av_log(s, AV_LOG_ERROR, "unsupported video resolution, "
757 "gxf muxer only accepts PAL or NTSC resolutions currently\n");
760 avpriv_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den);
761 if (gxf_find_lines_index(st) < 0)
762 sc->lines_index = -1;
763 sc->sample_size = st->codec->bit_rate;
764 sc->fields = 2; /* interlaced */
768 switch (st->codec->codec_id) {
771 gxf->flags |= 0x00004000;
774 case CODEC_ID_MPEG1VIDEO:
779 case CODEC_ID_MPEG2VIDEO:
780 sc->first_gop_closed = -1;
783 gxf->flags |= 0x00008000;
786 case CODEC_ID_DVVIDEO:
787 if (st->codec->pix_fmt == PIX_FMT_YUV422P) {
790 gxf->flags |= 0x00002000;
794 gxf->flags |= 0x00001000;
799 av_log(s, AV_LOG_ERROR, "video codec not supported\n");
803 /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
804 sc->media_info = media_info<<8 | ('0'+tracks[media_info]++);
805 sc->order = s->nb_streams - st->index;
808 if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0)
812 gxf_init_timecode(s, &gxf->tc, vsc->fields);
815 gxf_init_timecode_track(&gxf->timecode_track, vsc);
816 gxf->flags |= 0x200000; // time code track is non-drop frame
818 gxf_write_map_packet(s, 0);
819 gxf_write_flt_packet(s);
820 gxf_write_umf_packet(s);
822 gxf->packet_count = 3;
828 static int gxf_write_eos_packet(AVIOContext *pb)
830 int64_t pos = avio_tell(pb);
832 gxf_write_packet_header(pb, PKT_EOS);
833 return updatePacketSize(pb, pos);
836 static int gxf_write_trailer(AVFormatContext *s)
838 GXFContext *gxf = s->priv_data;
839 AVIOContext *pb = s->pb;
843 ff_audio_interleave_close(s);
845 gxf_write_eos_packet(pb);
847 avio_seek(pb, 0, SEEK_SET);
848 /* overwrite map, flt and umf packets with new values */
849 gxf_write_map_packet(s, 1);
850 gxf_write_flt_packet(s);
851 gxf_write_umf_packet(s);
853 /* update duration in all map packets */
854 for (i = 1; i < gxf->map_offsets_nb; i++) {
855 avio_seek(pb, gxf->map_offsets[i], SEEK_SET);
856 gxf_write_map_packet(s, 1);
860 avio_seek(pb, end, SEEK_SET);
862 av_freep(&gxf->flt_entries);
863 av_freep(&gxf->map_offsets);
868 static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
872 for(i=0; i<size-4 && c!=0x100; i++){
874 if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
875 sc->first_gop_closed= (buf[i+4]>>6)&1;
877 return (buf[i+1]>>3)&7;
880 static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
882 GXFContext *gxf = s->priv_data;
883 AVIOContext *pb = s->pb;
884 AVStream *st = s->streams[pkt->stream_index];
885 GXFStreamContext *sc = st->priv_data;
887 /* If the video is frame-encoded, the frame numbers shall be represented by
888 * even field numbers.
889 * see SMPTE360M-2004 6.4.2.1.3 Media field number */
890 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
891 field_nb = gxf->nb_fields;
893 field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
894 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
897 avio_w8(pb, sc->media_type);
898 avio_w8(pb, st->index);
899 avio_wb32(pb, field_nb);
900 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
902 avio_wb16(pb, size / 2);
903 } else if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
904 int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
905 if (frame_type == AV_PICTURE_TYPE_I) {
908 } else if (frame_type == AV_PICTURE_TYPE_B) {
916 } else if (st->codec->codec_id == CODEC_ID_DVVIDEO) {
917 avio_w8(pb, size / 4096);
921 avio_wb32(pb, field_nb);
922 avio_w8(pb, 1); /* flags */
923 avio_w8(pb, 0); /* reserved */
927 static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
929 GXFContext *gxf = s->priv_data;
930 AVIOContext *pb = s->pb;
931 AVStream *st = s->streams[pkt->stream_index];
932 int64_t pos = avio_tell(pb);
934 int packet_start_offset = avio_tell(pb) / 1024;
936 gxf_write_packet_header(pb, PKT_MEDIA);
937 if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
938 padding = 4 - pkt->size % 4;
939 else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
940 padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
941 gxf_write_media_preamble(s, pkt, pkt->size + padding);
942 avio_write(pb, pkt->data, pkt->size);
943 gxf_write_padding(pb, padding);
945 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
946 if (!(gxf->flt_entries_nb % 500)) {
947 gxf->flt_entries = av_realloc_f(gxf->flt_entries,
948 sizeof(*gxf->flt_entries),
949 gxf->flt_entries_nb+500);
950 if (!gxf->flt_entries) {
951 av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
955 gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset;
956 gxf->nb_fields += 2; // count fields
959 updatePacketSize(pb, pos);
962 if (gxf->packet_count == 100) {
963 gxf_write_map_packet(s, 0);
964 gxf->packet_count = 0;
972 static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur)
974 GXFContext *gxf = s->priv_data;
975 AVPacket *pkt[2] = { cur, next };
977 GXFStreamContext *sc[2];
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->codec->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
987 field_nb[i] = pkt[i]->dts; // dts are field based
990 return field_nb[1] > field_nb[0] ||
991 (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order);
994 static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
996 if (pkt && s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
997 pkt->duration = 2; // enforce 2 fields
998 return ff_audio_rechunk_interleave(s, out, pkt, flush,
999 av_interleave_packet_per_dts, gxf_compare_field_nb);
1002 static const AVOption options[] = {
1003 { TIMECODE_OPT(GXFContext, AV_OPT_FLAG_ENCODING_PARAM) },
1007 static const AVClass gxf_muxer_class = {
1008 .class_name = "GXF muxer",
1009 .item_name = av_default_item_name,
1011 .version = LIBAVUTIL_VERSION_INT,
1014 AVOutputFormat ff_gxf_muxer = {
1016 .long_name = NULL_IF_CONFIG_SMALL("GXF format"),
1017 .extensions = "gxf",
1018 .priv_data_size = sizeof(GXFContext),
1019 .audio_codec = CODEC_ID_PCM_S16LE,
1020 .video_codec = CODEC_ID_MPEG2VIDEO,
1021 .write_header = gxf_write_header,
1022 .write_packet = gxf_write_packet,
1023 .write_trailer = gxf_write_trailer,
1024 .interleave_packet = gxf_interleave_packet,
1025 .priv_class = &gxf_muxer_class,