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
25 #include "audiointerleave.h"
27 #define GXF_AUDIO_PACKET_SIZE 65536
29 typedef struct GXFStreamContext {
30 AudioInterleaveContext aic;
43 int b_per_i_or_p; ///< number of B frames per I frame or P frame
45 unsigned order; ///< interleaving order
48 typedef struct GXFContext {
50 uint16_t audio_tracks;
52 int64_t creation_time;
53 uint32_t umf_start_offset;
54 uint32_t umf_track_offset;
55 uint32_t umf_media_offset;
57 uint16_t umf_track_size;
58 uint16_t umf_media_size;
61 GXFStreamContext timecode_track;
62 unsigned *flt_entries; ///< offsets of packets /1024, starts after 2nd video field
63 unsigned flt_entries_nb;
64 uint64_t *map_offsets; ///< offset of map packets
65 unsigned map_offsets_nb;
66 unsigned packet_count;
72 { 480, 1 }, /* NTSC */
73 { 512, 1 }, /* NTSC + VBI */
75 { 608, 2 }, /* PAL + VBI */
80 static const AVCodecTag gxf_media_types[] = {
81 { CODEC_ID_MJPEG , 3 }, /* NTSC */
82 { CODEC_ID_MJPEG , 4 }, /* PAL */
83 { CODEC_ID_PCM_S24LE , 9 },
84 { CODEC_ID_PCM_S16LE , 10 },
85 { CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */
86 { CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */
87 { CODEC_ID_DVVIDEO , 13 }, /* NTSC */
88 { CODEC_ID_DVVIDEO , 14 }, /* PAL */
89 { CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */
90 { CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */
91 { CODEC_ID_AC3 , 17 },
92 //{ CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */
93 { CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */
94 { CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */
95 { CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */
99 #define SERVER_PATH "EXT:/PDR/default/"
100 #define ES_NAME_PATTERN "EXT:/PDR/default/ES."
102 static int gxf_find_lines_index(AVStream *st)
104 GXFStreamContext *sc = st->priv_data;
107 for (i = 0; i < 6; ++i) {
108 if (st->codec->height == gxf_lines_tab[i].height) {
109 sc->lines_index = gxf_lines_tab[i].index;
116 static void gxf_write_padding(AVIOContext *pb, int64_t to_pad)
118 for (; to_pad > 0; to_pad--) {
123 static int64_t updatePacketSize(AVIOContext *pb, int64_t pos)
128 size = url_ftell(pb) - pos;
130 gxf_write_padding(pb, 4 - size % 4);
131 size = url_ftell(pb) - pos;
133 curpos = url_ftell(pb);
134 url_fseek(pb, pos + 6, SEEK_SET);
136 url_fseek(pb, curpos, SEEK_SET);
140 static int64_t updateSize(AVIOContext *pb, int64_t pos)
144 curpos = url_ftell(pb);
145 url_fseek(pb, pos, SEEK_SET);
146 avio_wb16(pb, curpos - pos - 2);
147 url_fseek(pb, curpos, SEEK_SET);
151 static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type)
153 avio_wb32(pb, 0); /* packet leader for synchro */
155 avio_w8(pb, type); /* map packet */
156 avio_wb32(pb, 0); /* size */
157 avio_wb32(pb, 0); /* reserved */
158 avio_w8(pb, 0xE1); /* trailer 1 */
159 avio_w8(pb, 0xE2); /* trailer 2 */
162 static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st)
164 GXFStreamContext *sc = st->priv_data;
166 int size, starting_line;
169 sc->p_per_gop = sc->pframes / sc->iframes;
170 if (sc->pframes % sc->iframes)
173 sc->b_per_i_or_p = sc->bframes / sc->pframes;
174 if (sc->bframes % sc->pframes)
177 if (sc->p_per_gop > 9)
178 sc->p_per_gop = 9; /* ensure value won't take more than one char */
179 if (sc->b_per_i_or_p > 9)
180 sc->b_per_i_or_p = 9; /* ensure value won't take more than one char */
182 if (st->codec->height == 512 || st->codec->height == 608)
183 starting_line = 7; // VBI
184 else if (st->codec->height == 480)
187 starting_line = 23; // default PAL
189 size = snprintf(buffer, 1024, "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
190 "Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n",
191 (float)st->codec->bit_rate, sc->p_per_gop, sc->b_per_i_or_p,
192 st->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
193 starting_line, (st->codec->height + 15) / 16);
194 avio_w8(pb, TRACK_MPG_AUX);
195 avio_w8(pb, size + 1);
196 avio_write(pb, (uint8_t *)buffer, size + 1);
200 static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFStreamContext *sc)
202 avio_w8(pb, 0); /* fields */
203 avio_w8(pb, 0); /* seconds */
204 avio_w8(pb, 0); /* minutes */
205 avio_w8(pb, 0); /* flags + hours */
211 static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
213 AVIOContext *pb = s->pb;
215 int mpeg = sc->track_type == 4 || sc->track_type == 9;
217 /* track description section */
218 avio_w8(pb, sc->media_type + 0x80);
219 avio_w8(pb, index + 0xC0);
222 avio_wb16(pb, 0); /* size */
224 /* media file name */
225 avio_w8(pb, TRACK_NAME);
226 avio_w8(pb, strlen(ES_NAME_PATTERN) + 3);
227 avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1);
228 avio_wb16(pb, sc->media_info);
232 /* auxiliary information */
233 avio_w8(pb, TRACK_AUX);
235 if (sc->track_type == 3)
236 gxf_write_timecode_auxiliary(pb, sc);
241 /* file system version */
242 avio_w8(pb, TRACK_VER);
247 gxf_write_mpeg_auxiliary(pb, s->streams[index]);
250 avio_w8(pb, TRACK_FPS);
252 avio_wb32(pb, sc->frame_rate_index);
254 /* lines per frame */
255 avio_w8(pb, TRACK_LINES);
257 avio_wb32(pb, sc->lines_index);
259 /* fields per frame */
260 avio_w8(pb, TRACK_FPF);
262 avio_wb32(pb, sc->fields);
264 return updateSize(pb, pos);
267 static int gxf_write_material_data_section(AVFormatContext *s)
269 GXFContext *gxf = s->priv_data;
270 AVIOContext *pb = s->pb;
273 const char *filename = strrchr(s->filename, '/');
276 avio_wb16(pb, 0); /* size */
282 filename = s->filename;
283 len = strlen(filename);
285 avio_w8(pb, MAT_NAME);
286 avio_w8(pb, strlen(SERVER_PATH) + len + 1);
287 avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1);
288 avio_write(pb, filename, len);
292 avio_w8(pb, MAT_FIRST_FIELD);
297 avio_w8(pb, MAT_LAST_FIELD);
299 avio_wb32(pb, gxf->nb_fields);
302 avio_w8(pb, MAT_MARK_IN);
306 avio_w8(pb, MAT_MARK_OUT);
308 avio_wb32(pb, gxf->nb_fields);
311 avio_w8(pb, MAT_SIZE);
313 avio_wb32(pb, url_fsize(pb) / 1024);
315 return updateSize(pb, pos);
318 static int gxf_write_track_description_section(AVFormatContext *s)
320 GXFContext *gxf = s->priv_data;
321 AVIOContext *pb = s->pb;
326 avio_wb16(pb, 0); /* size */
327 for (i = 0; i < s->nb_streams; ++i)
328 gxf_write_track_description(s, s->streams[i]->priv_data, i);
330 gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams);
332 return updateSize(pb, pos);
335 static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
337 GXFContext *gxf = s->priv_data;
338 AVIOContext *pb = s->pb;
339 int64_t pos = url_ftell(pb);
342 if (!(gxf->map_offsets_nb % 30)) {
343 gxf->map_offsets = av_realloc(gxf->map_offsets,
344 (gxf->map_offsets_nb+30)*sizeof(*gxf->map_offsets));
345 if (!gxf->map_offsets) {
346 av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n");
350 gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here
353 gxf_write_packet_header(pb, PKT_MAP);
356 avio_w8(pb, 0xE0); /* version */
357 avio_w8(pb, 0xFF); /* reserved */
359 gxf_write_material_data_section(s);
360 gxf_write_track_description_section(s);
362 return updatePacketSize(pb, pos);
365 static int gxf_write_flt_packet(AVFormatContext *s)
367 GXFContext *gxf = s->priv_data;
368 AVIOContext *pb = s->pb;
369 int64_t pos = url_ftell(pb);
370 int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1;
371 int flt_entries = gxf->nb_fields / fields_per_flt;
374 gxf_write_packet_header(pb, PKT_FLT);
376 avio_wl32(pb, fields_per_flt); /* number of fields */
377 avio_wl32(pb, flt_entries); /* number of active flt entries */
379 if (gxf->flt_entries) {
380 for (i = 0; i < flt_entries; i++)
381 avio_wl32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]);
384 for (; i < 1000; i++)
387 return updatePacketSize(pb, pos);
390 static int gxf_write_umf_material_description(AVFormatContext *s)
392 GXFContext *gxf = s->priv_data;
393 AVIOContext *pb = s->pb;
394 int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
398 gxf->nb_fields / (timecode_base * 3600) % 24 << 24 | // hours
399 gxf->nb_fields / (timecode_base * 60) % 60 << 16 | // minutes
400 gxf->nb_fields / timecode_base % 60 << 8 | // seconds
401 gxf->nb_fields % timecode_base; // fields
403 avio_wl32(pb, gxf->flags);
404 avio_wl32(pb, gxf->nb_fields); /* length of the longest track */
405 avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */
406 avio_wl32(pb, 0); /* mark in */
407 avio_wl32(pb, gxf->nb_fields); /* mark out */
408 avio_wl32(pb, 0); /* timecode mark in */
409 avio_wl32(pb, timecode); /* timecode mark out */
410 avio_wl64(pb, s->timestamp); /* modification time */
411 avio_wl64(pb, s->timestamp); /* creation time */
412 avio_wl16(pb, 0); /* reserved */
413 avio_wl16(pb, 0); /* reserved */
414 avio_wl16(pb, gxf->audio_tracks);
415 avio_wl16(pb, 1); /* timecode track count */
416 avio_wl16(pb, 0); /* reserved */
417 avio_wl16(pb, gxf->mpeg_tracks);
421 static int gxf_write_umf_payload(AVFormatContext *s)
423 GXFContext *gxf = s->priv_data;
424 AVIOContext *pb = s->pb;
426 avio_wl32(pb, gxf->umf_length); /* total length of the umf data */
427 avio_wl32(pb, 3); /* version */
428 avio_wl32(pb, s->nb_streams+1);
429 avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */
430 avio_wl32(pb, gxf->umf_track_size);
431 avio_wl32(pb, s->nb_streams+1);
432 avio_wl32(pb, gxf->umf_media_offset);
433 avio_wl32(pb, gxf->umf_media_size);
434 avio_wl32(pb, gxf->umf_length); /* user data offset */
435 avio_wl32(pb, 0); /* user data size */
436 avio_wl32(pb, 0); /* reserved */
437 avio_wl32(pb, 0); /* reserved */
441 static int gxf_write_umf_track_description(AVFormatContext *s)
443 AVIOContext *pb = s->pb;
444 GXFContext *gxf = s->priv_data;
445 int64_t pos = url_ftell(pb);
448 gxf->umf_track_offset = pos - gxf->umf_start_offset;
449 for (i = 0; i < s->nb_streams; ++i) {
450 GXFStreamContext *sc = s->streams[i]->priv_data;
451 avio_wl16(pb, sc->media_info);
455 avio_wl16(pb, gxf->timecode_track.media_info);
458 return url_ftell(pb) - pos;
461 static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
463 GXFStreamContext *sc = st->priv_data;
465 if (st->codec->pix_fmt == PIX_FMT_YUV422P)
468 avio_wl32(pb, 1); /* default to 420 */
469 avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
470 avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
471 avio_wl32(pb, 1); /* I picture per GOP */
472 avio_wl32(pb, sc->p_per_gop);
473 avio_wl32(pb, sc->b_per_i_or_p);
474 if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO)
476 else if (st->codec->codec_id == CODEC_ID_MPEG1VIDEO)
480 avio_wl32(pb, 0); /* reserved */
484 static int gxf_write_umf_media_timecode(AVIOContext *pb, GXFStreamContext *sc)
486 avio_wl32(pb, 1); /* non drop frame */
487 avio_wl32(pb, 0); /* reserved */
488 avio_wl32(pb, 0); /* reserved */
489 avio_wl32(pb, 0); /* reserved */
490 avio_wl32(pb, 0); /* reserved */
491 avio_wl32(pb, 0); /* reserved */
492 avio_wl32(pb, 0); /* reserved */
493 avio_wl32(pb, 0); /* reserved */
497 static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc)
501 for (i = 0; i < 8; i++) {
507 static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
509 avio_wl64(pb, av_dbl2int(1)); /* sound level to begin to */
510 avio_wl64(pb, av_dbl2int(1)); /* sound level to begin to */
511 avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */
512 avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */
513 avio_wl32(pb, 0); /* reserved */
514 avio_wl32(pb, 0); /* reserved */
519 static int gxf_write_umf_media_mjpeg(AVIOContext *pb, GXFStreamContext *sc)
521 avio_wb64(pb, 0); /* FIXME FLOAT max chroma quant level */
522 avio_wb64(pb, 0); /* FIXME FLOAT max luma quant level */
523 avio_wb64(pb, 0); /* FIXME FLOAT min chroma quant level */
524 avio_wb64(pb, 0); /* FIXME FLOAT min luma quant level */
529 static int gxf_write_umf_media_description(AVFormatContext *s)
531 GXFContext *gxf = s->priv_data;
532 AVIOContext *pb = s->pb;
537 gxf->umf_media_offset = pos - gxf->umf_start_offset;
538 for (i = 0; i <= s->nb_streams; ++i) {
539 GXFStreamContext *sc;
540 int64_t startpos, curpos;
542 if (i == s->nb_streams)
543 sc = &gxf->timecode_track;
545 sc = s->streams[i]->priv_data;
547 startpos = url_ftell(pb);
548 avio_wl16(pb, 0); /* length */
549 avio_wl16(pb, sc->media_info);
550 avio_wl16(pb, 0); /* reserved */
551 avio_wl16(pb, 0); /* reserved */
552 avio_wl32(pb, gxf->nb_fields);
553 avio_wl32(pb, 0); /* attributes rw, ro */
554 avio_wl32(pb, 0); /* mark in */
555 avio_wl32(pb, gxf->nb_fields); /* mark out */
556 avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN));
557 avio_wb16(pb, sc->media_info);
558 for (j = strlen(ES_NAME_PATTERN)+2; j < 88; j++)
560 avio_wl32(pb, sc->track_type);
561 avio_wl32(pb, sc->sample_rate);
562 avio_wl32(pb, sc->sample_size);
563 avio_wl32(pb, 0); /* reserved */
565 if (sc == &gxf->timecode_track)
566 gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */
568 AVStream *st = s->streams[i];
569 switch (st->codec->codec_id) {
570 case CODEC_ID_MPEG1VIDEO:
571 case CODEC_ID_MPEG2VIDEO:
572 gxf_write_umf_media_mpeg(pb, st);
574 case CODEC_ID_PCM_S16LE:
575 gxf_write_umf_media_audio(pb, sc);
577 case CODEC_ID_DVVIDEO:
578 gxf_write_umf_media_dv(pb, sc);
583 curpos = url_ftell(pb);
584 url_fseek(pb, startpos, SEEK_SET);
585 avio_wl16(pb, curpos - startpos);
586 url_fseek(pb, curpos, SEEK_SET);
588 return url_ftell(pb) - pos;
591 static int gxf_write_umf_packet(AVFormatContext *s)
593 GXFContext *gxf = s->priv_data;
594 AVIOContext *pb = s->pb;
595 int64_t pos = url_ftell(pb);
597 gxf_write_packet_header(pb, PKT_UMF);
600 avio_w8(pb, 3); /* first and last (only) packet */
601 avio_wb32(pb, gxf->umf_length); /* data length */
603 gxf->umf_start_offset = url_ftell(pb);
604 gxf_write_umf_payload(s);
605 gxf_write_umf_material_description(s);
606 gxf->umf_track_size = gxf_write_umf_track_description(s);
607 gxf->umf_media_size = gxf_write_umf_media_description(s);
608 gxf->umf_length = url_ftell(pb) - gxf->umf_start_offset;
609 return updatePacketSize(pb, pos);
612 static const int GXF_samples_per_frame[] = { 32768, 0 };
614 static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
619 sc->media_type = vsc->sample_rate == 60 ? 7 : 8;
620 sc->sample_rate = vsc->sample_rate;
621 sc->media_info = ('T'<<8) | '0';
623 sc->frame_rate_index = vsc->frame_rate_index;
624 sc->lines_index = vsc->lines_index;
625 sc->sample_size = 16;
626 sc->fields = vsc->fields;
629 static int gxf_write_header(AVFormatContext *s)
631 AVIOContext *pb = s->pb;
632 GXFContext *gxf = s->priv_data;
633 GXFStreamContext *vsc = NULL;
634 uint8_t tracks[255] = {0};
635 int i, media_info = 0;
637 if (url_is_streamed(pb)) {
638 av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome");
642 gxf->flags |= 0x00080000; /* material is simple clip */
643 for (i = 0; i < s->nb_streams; ++i) {
644 AVStream *st = s->streams[i];
645 GXFStreamContext *sc = av_mallocz(sizeof(*sc));
647 return AVERROR(ENOMEM);
650 sc->media_type = ff_codec_get_tag(gxf_media_types, st->codec->codec_id);
651 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
652 if (st->codec->codec_id != CODEC_ID_PCM_S16LE) {
653 av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
656 if (st->codec->sample_rate != 48000) {
657 av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
660 if (st->codec->channels != 1) {
661 av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
665 sc->sample_rate = st->codec->sample_rate;
666 av_set_pts_info(st, 64, 1, sc->sample_rate);
667 sc->sample_size = 16;
668 sc->frame_rate_index = -2;
669 sc->lines_index = -2;
672 gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
674 } else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
676 av_log(s, AV_LOG_ERROR, "video stream must be the first track\n");
679 /* FIXME check from time_base ? */
680 if (st->codec->height == 480 || st->codec->height == 512) { /* NTSC or NTSC+VBI */
681 sc->frame_rate_index = 5;
682 sc->sample_rate = 60;
683 gxf->flags |= 0x00000080;
684 gxf->time_base = (AVRational){ 1001, 60000 };
685 } else if (st->codec->height == 576 || st->codec->height == 608) { /* PAL or PAL+VBI */
686 sc->frame_rate_index = 6;
688 sc->sample_rate = 50;
689 gxf->flags |= 0x00000040;
690 gxf->time_base = (AVRational){ 1, 50 };
692 av_log(s, AV_LOG_ERROR, "unsupported video resolution, "
693 "gxf muxer only accepts PAL or NTSC resolutions currently\n");
696 av_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den);
697 if (gxf_find_lines_index(st) < 0)
698 sc->lines_index = -1;
699 sc->sample_size = st->codec->bit_rate;
700 sc->fields = 2; /* interlaced */
704 switch (st->codec->codec_id) {
707 gxf->flags |= 0x00004000;
710 case CODEC_ID_MPEG1VIDEO:
715 case CODEC_ID_MPEG2VIDEO:
716 sc->first_gop_closed = -1;
719 gxf->flags |= 0x00008000;
722 case CODEC_ID_DVVIDEO:
723 if (st->codec->pix_fmt == PIX_FMT_YUV422P) {
726 gxf->flags |= 0x00002000;
730 gxf->flags |= 0x00001000;
735 av_log(s, AV_LOG_ERROR, "video codec not supported\n");
739 /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
740 sc->media_info = media_info<<8 | ('0'+tracks[media_info]++);
741 sc->order = s->nb_streams - st->index;
744 if (ff_audio_interleave_init(s, GXF_samples_per_frame, (AVRational){ 1, 48000 }) < 0)
747 gxf_init_timecode_track(&gxf->timecode_track, vsc);
748 gxf->flags |= 0x200000; // time code track is non-drop frame
750 gxf_write_map_packet(s, 0);
751 gxf_write_flt_packet(s);
752 gxf_write_umf_packet(s);
754 gxf->packet_count = 3;
756 put_flush_packet(pb);
760 static int gxf_write_eos_packet(AVIOContext *pb)
762 int64_t pos = url_ftell(pb);
764 gxf_write_packet_header(pb, PKT_EOS);
765 return updatePacketSize(pb, pos);
768 static int gxf_write_trailer(AVFormatContext *s)
770 GXFContext *gxf = s->priv_data;
771 AVIOContext *pb = s->pb;
775 ff_audio_interleave_close(s);
777 gxf_write_eos_packet(pb);
779 url_fseek(pb, 0, SEEK_SET);
780 /* overwrite map, flt and umf packets with new values */
781 gxf_write_map_packet(s, 1);
782 gxf_write_flt_packet(s);
783 gxf_write_umf_packet(s);
784 put_flush_packet(pb);
785 /* update duration in all map packets */
786 for (i = 1; i < gxf->map_offsets_nb; i++) {
787 url_fseek(pb, gxf->map_offsets[i], SEEK_SET);
788 gxf_write_map_packet(s, 1);
789 put_flush_packet(pb);
792 url_fseek(pb, end, SEEK_SET);
794 av_freep(&gxf->flt_entries);
795 av_freep(&gxf->map_offsets);
800 static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
804 for(i=0; i<size-4 && c!=0x100; i++){
806 if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
807 sc->first_gop_closed= (buf[i+4]>>6)&1;
809 return (buf[i+1]>>3)&7;
812 static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
814 GXFContext *gxf = s->priv_data;
815 AVIOContext *pb = s->pb;
816 AVStream *st = s->streams[pkt->stream_index];
817 GXFStreamContext *sc = st->priv_data;
819 /* If the video is frame-encoded, the frame numbers shall be represented by
820 * even field numbers.
821 * see SMPTE360M-2004 6.4.2.1.3 Media field number */
822 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
823 field_nb = gxf->nb_fields;
825 field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
826 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
829 avio_w8(pb, sc->media_type);
830 avio_w8(pb, st->index);
831 avio_wb32(pb, field_nb);
832 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
834 avio_wb16(pb, size / 2);
835 } else if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
836 int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
837 if (frame_type == FF_I_TYPE) {
840 } else if (frame_type == FF_B_TYPE) {
848 } else if (st->codec->codec_id == CODEC_ID_DVVIDEO) {
849 avio_w8(pb, size / 4096);
853 avio_wb32(pb, field_nb);
854 avio_w8(pb, 1); /* flags */
855 avio_w8(pb, 0); /* reserved */
859 static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
861 GXFContext *gxf = s->priv_data;
862 AVIOContext *pb = s->pb;
863 AVStream *st = s->streams[pkt->stream_index];
864 int64_t pos = url_ftell(pb);
866 int packet_start_offset = url_ftell(pb) / 1024;
868 gxf_write_packet_header(pb, PKT_MEDIA);
869 if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
870 padding = 4 - pkt->size % 4;
871 else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
872 padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
873 gxf_write_media_preamble(s, pkt, pkt->size + padding);
874 avio_write(pb, pkt->data, pkt->size);
875 gxf_write_padding(pb, padding);
877 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
878 if (!(gxf->flt_entries_nb % 500)) {
879 gxf->flt_entries = av_realloc(gxf->flt_entries,
880 (gxf->flt_entries_nb+500)*sizeof(*gxf->flt_entries));
881 if (!gxf->flt_entries) {
882 av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
886 gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset;
887 gxf->nb_fields += 2; // count fields
890 updatePacketSize(pb, pos);
893 if (gxf->packet_count == 100) {
894 gxf_write_map_packet(s, 0);
895 gxf->packet_count = 0;
898 put_flush_packet(pb);
903 static int gxf_compare_field_nb(AVFormatContext *s, AVPacket *next, AVPacket *cur)
905 GXFContext *gxf = s->priv_data;
906 AVPacket *pkt[2] = { cur, next };
908 GXFStreamContext *sc[2];
910 for (i = 0; i < 2; i++) {
911 AVStream *st = s->streams[pkt[i]->stream_index];
912 sc[i] = st->priv_data;
913 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
914 field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den,
915 (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
916 field_nb[i] &= ~1; // compare against even field number because audio must be before video
918 field_nb[i] = pkt[i]->dts; // dts are field based
921 return field_nb[1] > field_nb[0] ||
922 (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order);
925 static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
927 if (pkt && s->streams[pkt->stream_index]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
928 pkt->duration = 2; // enforce 2 fields
929 return ff_audio_rechunk_interleave(s, out, pkt, flush,
930 av_interleave_packet_per_dts, gxf_compare_field_nb);
933 AVOutputFormat ff_gxf_muxer = {
935 NULL_IF_CONFIG_SMALL("GXF format"),
946 gxf_interleave_packet,