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 modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (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
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #define GXF_AUDIO_PACKET_SIZE 65536
29 typedef struct GXFStreamContext {
30 AVCodecContext *codec;
31 AVFifoBuffer audio_buffer;
50 typedef struct GXFContext {
52 uint32_t material_flags;
53 uint16_t audio_tracks;
55 int64_t creation_time;
56 uint32_t umf_start_offset;
57 uint32_t umf_track_offset;
58 uint32_t umf_media_offset;
59 uint32_t umf_user_data_offset;
60 uint32_t umf_user_data_size;
62 uint16_t umf_track_size;
63 uint16_t umf_media_size;
68 GXFStreamContext streams[48];
71 typedef struct GXF_Lines {
77 /* FIXME check if it is relevant */
78 static const GXF_Lines gxf_lines_tab[] = {
79 { 480, 1 }, /* NTSC */
80 { 512, 1 }, /* NTSC + VBI */
82 { 608, 2 }, /* PAL + VBI */
87 static const CodecTag gxf_media_types[] = {
88 { CODEC_ID_MJPEG , 3 }, /* NTSC */
89 { CODEC_ID_MJPEG , 4 }, /* PAL */
90 { CODEC_ID_PCM_S24LE , 9 },
91 { CODEC_ID_PCM_S16LE , 10 },
92 { CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */
93 { CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */
94 { CODEC_ID_DVVIDEO , 13 }, /* NTSC */
95 { CODEC_ID_DVVIDEO , 14 }, /* PAL */
96 { CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */
97 { CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */
98 { CODEC_ID_AC3 , 17 },
99 //{ CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */
100 { CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */
101 { CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */
102 { CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */
106 #define SERVER_PATH "/space/"
107 #define ES_NAME_PATTERN "ES."
109 static int gxf_find_lines_index(GXFStreamContext *ctx)
113 for (i = 0; i < 6; ++i) {
114 if (ctx->codec->height == gxf_lines_tab[i].height) {
115 ctx->lines_index = gxf_lines_tab[i].index;
122 static void gxf_write_padding(ByteIOContext *pb, offset_t to_pad)
124 for (; to_pad > 0; to_pad--) {
129 static offset_t updatePacketSize(ByteIOContext *pb, offset_t pos)
134 size = url_ftell(pb) - pos;
136 gxf_write_padding(pb, 4 - size % 4);
137 size = url_ftell(pb) - pos;
139 curpos = url_ftell(pb);
140 url_fseek(pb, pos + 6, SEEK_SET);
142 url_fseek(pb, curpos, SEEK_SET);
146 static offset_t updateSize(ByteIOContext *pb, offset_t pos)
150 curpos = url_ftell(pb);
151 url_fseek(pb, pos, SEEK_SET);
152 put_be16(pb, curpos - pos - 2);
153 url_fseek(pb, curpos, SEEK_SET);
157 static void gxf_write_packet_header(ByteIOContext *pb, pkt_type_t type)
159 put_be32(pb, 0); /* packet leader for synchro */
161 put_byte(pb, type); /* map packet */
162 put_be32(pb, 0); /* size */
163 put_be32(pb, 0); /* reserved */
164 put_byte(pb, 0xE1); /* trailer 1 */
165 put_byte(pb, 0xE2); /* trailer 2 */
168 static int gxf_write_mpeg_auxiliary(ByteIOContext *pb, GXFStreamContext *ctx)
174 ctx->p_per_gop = ctx->pframes / ctx->iframes;
175 if (ctx->pframes % ctx->iframes)
178 ctx->b_per_gop = ctx->bframes / ctx->pframes;
179 if (ctx->p_per_gop > 9)
180 ctx->p_per_gop = 9; /* ensure value won't take more than one char */
181 if (ctx->b_per_gop > 9)
182 ctx->b_per_gop = 9; /* ensure value won't take more than one char */
184 size = snprintf(buffer, 1024, "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
185 "Pix 0\nCf %d\nCg %d\nSl 7\nnl16 %d\nVi 1\nf1 1\n",
186 (float)ctx->codec->bit_rate, ctx->p_per_gop, ctx->b_per_gop,
187 ctx->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1, ctx->first_gop_closed == 1,
188 ctx->codec->height / 16);
190 put_byte(pb, size + 1);
191 put_buffer(pb, (uint8_t *)buffer, size + 1);
195 static int gxf_write_timecode_auxiliary(ByteIOContext *pb, GXFStreamContext *ctx)
197 /* FIXME implement that */
198 put_byte(pb, 0); /* fields */
199 put_byte(pb, 0); /* seconds */
200 put_byte(pb, 0); /* minutes */
201 put_byte(pb, 0); /* flags + hours */
207 static int gxf_write_track_description(ByteIOContext *pb, GXFStreamContext *stream)
211 /* track description section */
212 put_byte(pb, stream->media_type + 0x80);
213 put_byte(pb, stream->index + 0xC0);
216 put_be16(pb, 0); /* size */
218 /* media file name */
220 put_byte(pb, strlen(ES_NAME_PATTERN) + 3);
221 put_tag(pb, ES_NAME_PATTERN);
222 put_be16(pb, stream->media_info);
225 if (stream->codec->codec_id != CODEC_ID_MPEG2VIDEO) {
226 /* auxiliary information */
229 if (stream->codec->codec_id == CODEC_ID_NONE)
230 gxf_write_timecode_auxiliary(pb, stream);
235 /* file system version */
240 if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO)
241 gxf_write_mpeg_auxiliary(pb, stream);
246 put_be32(pb, stream->frame_rate_index);
248 /* lines per frame */
251 put_be32(pb, stream->lines_index);
253 /* fields per frame */
256 put_be32(pb, stream->fields);
258 return updateSize(pb, pos);
261 static int gxf_write_material_data_section(ByteIOContext *pb, GXFContext *ctx)
264 const char *filename = strrchr(ctx->fc->filename, '/');
267 put_be16(pb, 0); /* size */
273 filename = ctx->fc->filename;
275 put_byte(pb, strlen(SERVER_PATH) + strlen(filename) + 1);
276 put_tag(pb, SERVER_PATH);
277 put_tag(pb, filename);
288 put_be32(pb, ctx->nb_frames);
297 put_be32(pb, ctx->nb_frames);
302 put_be32(pb, url_fsize(pb) / 1024);
304 return updateSize(pb, pos);
307 static int gxf_write_track_description_section(ByteIOContext *pb, GXFContext *ctx)
313 put_be16(pb, 0); /* size */
314 for (i = 0; i < ctx->fc->nb_streams; ++i)
315 gxf_write_track_description(pb, &ctx->streams[i]);
316 return updateSize(pb, pos);
319 static int gxf_write_map_packet(ByteIOContext *pb, GXFContext *ctx)
321 offset_t pos = url_ftell(pb);
323 gxf_write_packet_header(pb, PKT_MAP);
326 put_byte(pb, 0xE0); /* version */
327 put_byte(pb, 0xFF); /* reserved */
329 gxf_write_material_data_section(pb, ctx);
330 gxf_write_track_description_section(pb, ctx);
332 return updatePacketSize(pb, pos);
336 static int gxf_write_flt_packet(ByteIOContext *pb, GXFContext *ctx)
338 offset_t pos = url_ftell(pb);
341 gxf_write_packet_header(pb, PKT_FLT);
343 put_le32(pb, 1000); /* number of fields */
344 put_le32(pb, 0); /* number of active flt entries */
346 for (i = 0; i < 1000; ++i) {
349 return updatePacketSize(pb, pos);
353 static int gxf_write_umf_material_description(ByteIOContext *pb, GXFContext *ctx)
355 put_le32(pb, ctx->flags);
356 put_le32(pb, ctx->nb_frames); /* length of the longest track */
357 put_le32(pb, ctx->nb_frames); /* length of the shortest track */
358 put_le32(pb, 0); /* mark in */
359 put_le32(pb, ctx->nb_frames); /* mark out */
360 put_le32(pb, 0); /* timecode mark in */
361 put_le32(pb, ctx->nb_frames); /* timecode mark out */
362 put_le64(pb, ctx->fc->timestamp); /* modification time */
363 put_le64(pb, ctx->fc->timestamp); /* creation time */
364 put_le16(pb, 0); /* reserved */
365 put_le16(pb, 0); /* reserved */
366 put_le16(pb, ctx->audio_tracks);
367 put_le16(pb, 0); /* timecode track count */
368 put_le16(pb, 0); /* reserved */
369 put_le16(pb, ctx->mpeg_tracks);
373 static int gxf_write_umf_payload(ByteIOContext *pb, GXFContext *ctx)
375 put_le32(pb, ctx->umf_length); /* total length of the umf data */
376 put_le32(pb, 3); /* version */
377 put_le32(pb, ctx->fc->nb_streams);
378 put_le32(pb, ctx->umf_track_offset); /* umf track section offset */
379 put_le32(pb, ctx->umf_track_size);
380 put_le32(pb, ctx->fc->nb_streams);
381 put_le32(pb, ctx->umf_media_offset);
382 put_le32(pb, ctx->umf_media_size);
383 put_le32(pb, ctx->umf_user_data_offset); /* user data offset */
384 put_le32(pb, ctx->umf_user_data_size); /* user data size */
385 put_le32(pb, 0); /* reserved */
386 put_le32(pb, 0); /* reserved */
390 static int gxf_write_umf_track_description(ByteIOContext *pb, GXFContext *ctx)
392 offset_t pos = url_ftell(pb);
396 ctx->umf_track_offset = pos - ctx->umf_start_offset;
397 for (i = 0; i < ctx->fc->nb_streams; ++i) {
398 AVStream *st = ctx->fc->streams[i];
399 GXFStreamContext *sc = &ctx->streams[i];
402 switch (st->codec->codec_id) {
403 case CODEC_ID_MPEG1VIDEO: id= 'L'; break;
404 case CODEC_ID_MPEG2VIDEO: id= 'M'; break;
405 case CODEC_ID_PCM_S16LE: id= 'A'; break;
406 case CODEC_ID_DVVIDEO: id= sc->track_type == 6 ? 'E' : 'D'; break;
407 case CODEC_ID_MJPEG: id= 'V'; break;
410 sc->media_info= id << 8;
411 /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
412 sc->media_info |= '0' + (tracks[id]++);
413 put_le16(pb, sc->media_info);
416 return url_ftell(pb) - pos;
419 static int gxf_write_umf_media_mpeg(ByteIOContext *pb, GXFStreamContext *stream)
421 if (stream->codec->pix_fmt == PIX_FMT_YUV422P)
424 put_le32(pb, 1); /* default to 420 */
425 put_le32(pb, stream->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
426 put_le32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
427 put_le32(pb, 1); /* I picture per GOP */
428 put_le32(pb, stream->p_per_gop);
429 put_le32(pb, stream->b_per_gop);
430 if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO)
432 else if (stream->codec->codec_id == CODEC_ID_MPEG1VIDEO)
436 put_le32(pb, 0); /* reserved */
440 static int gxf_write_umf_media_timecode(ByteIOContext *pb, GXFStreamContext *track)
442 /* FIXME implement */
443 put_be32(pb, 0); /* drop frame flag */
444 put_be32(pb, 0); /* reserved */
445 put_be32(pb, 0); /* reserved */
446 put_be32(pb, 0); /* reserved */
447 put_be32(pb, 0); /* reserved */
448 put_be32(pb, 0); /* reserved */
449 put_be32(pb, 0); /* reserved */
450 put_be32(pb, 0); /* reserved */
454 static int gxf_write_umf_media_dv(ByteIOContext *pb, GXFStreamContext *track)
458 for (i = 0; i < 8; i++) {
464 static int gxf_write_umf_media_audio(ByteIOContext *pb, GXFStreamContext *track)
466 put_le64(pb, av_dbl2int(1)); /* sound level to begin to */
467 put_le64(pb, av_dbl2int(1)); /* sound level to begin to */
468 put_le32(pb, 0); /* number of fields over which to ramp up sound level */
469 put_le32(pb, 0); /* number of fields over which to ramp down sound level */
470 put_le32(pb, 0); /* reserved */
471 put_le32(pb, 0); /* reserved */
476 static int gxf_write_umf_media_mjpeg(ByteIOContext *pb, GXFStreamContext *track)
478 put_be64(pb, 0); /* FIXME FLOAT max chroma quant level */
479 put_be64(pb, 0); /* FIXME FLOAT max luma quant level */
480 put_be64(pb, 0); /* FIXME FLOAT min chroma quant level */
481 put_be64(pb, 0); /* FIXME FLOAT min luma quant level */
486 static int gxf_write_umf_media_description(ByteIOContext *pb, GXFContext *ctx)
492 ctx->umf_media_offset = pos - ctx->umf_start_offset;
493 for (i = 0; i < ctx->fc->nb_streams; ++i) {
494 GXFStreamContext *sc = &ctx->streams[i];
496 offset_t startpos, curpos;
497 int path_size = strlen(ES_NAME_PATTERN);
499 memset(buffer, 0, 88);
500 startpos = url_ftell(pb);
501 put_le16(pb, 0); /* length */
502 put_le16(pb, sc->media_info);
503 put_le16(pb, 0); /* reserved */
504 put_le16(pb, 0); /* reserved */
505 put_le32(pb, ctx->nb_frames);
506 put_le32(pb, 0); /* attributes rw, ro */
507 put_le32(pb, 0); /* mark in */
508 put_le32(pb, ctx->nb_frames); /* mark out */
509 strncpy(buffer, ES_NAME_PATTERN, path_size);
510 put_buffer(pb, (uint8_t *)buffer, path_size);
511 put_be16(pb, sc->media_info);
512 put_buffer(pb, (uint8_t *)buffer + path_size + 2, 88 - path_size - 2);
513 put_le32(pb, sc->track_type);
514 put_le32(pb, sc->sample_rate);
515 put_le32(pb, sc->sample_size);
516 put_le32(pb, 0); /* reserved */
517 switch (sc->codec->codec_id) {
518 case CODEC_ID_MPEG2VIDEO:
519 gxf_write_umf_media_mpeg(pb, sc);
521 case CODEC_ID_PCM_S16LE:
522 gxf_write_umf_media_audio(pb, sc);
524 case CODEC_ID_DVVIDEO:
525 gxf_write_umf_media_dv(pb, sc);
528 gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */
530 curpos = url_ftell(pb);
531 url_fseek(pb, startpos, SEEK_SET);
532 put_le16(pb, curpos - startpos);
533 url_fseek(pb, curpos, SEEK_SET);
535 return url_ftell(pb) - pos;
538 static int gxf_write_umf_user_data(ByteIOContext *pb, GXFContext *ctx)
540 offset_t pos = url_ftell(pb);
541 ctx->umf_user_data_offset = pos - ctx->umf_start_offset;
554 static int gxf_write_umf_packet(ByteIOContext *pb, GXFContext *ctx)
556 offset_t pos = url_ftell(pb);
558 gxf_write_packet_header(pb, PKT_UMF);
561 put_byte(pb, 3); /* first and last (only) packet */
562 put_be32(pb, ctx->umf_length); /* data length */
564 ctx->umf_start_offset = url_ftell(pb);
565 gxf_write_umf_payload(pb, ctx);
566 gxf_write_umf_material_description(pb, ctx);
567 ctx->umf_track_size = gxf_write_umf_track_description(pb, ctx);
568 ctx->umf_media_size = gxf_write_umf_media_description(pb, ctx);
569 ctx->umf_user_data_size = gxf_write_umf_user_data(pb, ctx);
570 ctx->umf_length = url_ftell(pb) - ctx->umf_start_offset;
571 return updatePacketSize(pb, pos);
574 static int gxf_write_header(AVFormatContext *s)
576 ByteIOContext *pb = &s->pb;
577 GXFContext *gxf = s->priv_data;
581 gxf->flags |= 0x00080000; /* material is simple clip */
582 for (i = 0; i < s->nb_streams; ++i) {
583 AVStream *st = s->streams[i];
584 GXFStreamContext *sc = &gxf->streams[i];
586 sc->codec = st->codec;
588 sc->media_type = codec_get_tag(gxf_media_types, sc->codec->codec_id);
589 if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
590 if (st->codec->codec_id != CODEC_ID_PCM_S16LE) {
591 av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
594 if (st->codec->sample_rate != 48000) {
595 av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
598 if (st->codec->channels != 1) {
599 av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
603 sc->sample_rate = st->codec->sample_rate;
604 av_set_pts_info(st, 64, 1, sc->sample_rate);
605 sc->sample_size = 16;
606 sc->frame_rate_index = -2;
607 sc->lines_index = -2;
610 gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
611 av_fifo_init(&sc->audio_buffer, 3*GXF_AUDIO_PACKET_SIZE);
612 } else if (sc->codec->codec_type == CODEC_TYPE_VIDEO) {
613 /* FIXME check from time_base ? */
614 if (sc->codec->height == 480 || sc->codec->height == 512) { /* NTSC or NTSC+VBI */
615 sc->frame_rate_index = 5;
616 sc->sample_rate = 60;
617 gxf->flags |= 0x00000080;
618 } else { /* assume PAL */
619 sc->frame_rate_index = 6;
621 sc->sample_rate = 50;
622 gxf->flags |= 0x00000040;
624 gxf->sample_rate = sc->sample_rate;
625 av_set_pts_info(st, 64, 1, sc->sample_rate);
626 if (gxf_find_lines_index(sc) < 0)
627 sc->lines_index = -1;
628 sc->sample_size = st->codec->bit_rate;
629 sc->fields = 2; /* interlaced */
630 switch (sc->codec->codec_id) {
631 case CODEC_ID_MPEG2VIDEO:
632 sc->first_gop_closed = -1;
635 gxf->flags |= 0x00008000;
637 case CODEC_ID_DVVIDEO:
638 if (sc->codec->pix_fmt == PIX_FMT_YUV422P) {
641 gxf->flags |= 0x00002000;
644 gxf->flags |= 0x00001000;
648 av_log(NULL, AV_LOG_ERROR, "video codec not supported\n");
653 gxf_write_map_packet(pb, gxf);
654 //gxf_write_flt_packet(pb, gxf);
655 gxf_write_umf_packet(pb, gxf);
656 put_flush_packet(pb);
660 static int gxf_write_eos_packet(ByteIOContext *pb, GXFContext *ctx)
662 offset_t pos = url_ftell(pb);
664 gxf_write_packet_header(pb, PKT_EOS);
665 return updatePacketSize(pb, pos);
668 static int gxf_write_trailer(AVFormatContext *s)
670 ByteIOContext *pb = &s->pb;
671 GXFContext *gxf = s->priv_data;
675 for (i = 0; i < s->nb_streams; ++i) {
676 if (s->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO) {
677 av_fifo_free(&gxf->streams[i].audio_buffer);
679 if (s->streams[i]->codec->frame_number > gxf->nb_frames)
680 gxf->nb_frames = 2 * s->streams[i]->codec->frame_number;
683 gxf_write_eos_packet(pb, gxf);
685 url_fseek(pb, 0, SEEK_SET);
686 /* overwrite map and umf packets with new values */
687 gxf_write_map_packet(pb, gxf);
688 //gxf_write_flt_packet(pb, gxf);
689 gxf_write_umf_packet(pb, gxf);
690 url_fseek(pb, end, SEEK_SET);
694 static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
698 for(i=0; i<size-4 && c!=0x100; i++){
700 if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
701 sc->first_gop_closed= (buf[i+4]>>6)&1;
703 return (buf[i+1]>>3)&7;
706 static int gxf_write_media_preamble(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt, int size)
708 GXFStreamContext *sc = &ctx->streams[pkt->stream_index];
709 int64_t dts = av_rescale(pkt->dts, ctx->sample_rate, sc->sample_rate);
711 put_byte(pb, sc->media_type);
712 put_byte(pb, sc->index);
714 if (sc->codec->codec_type == CODEC_TYPE_AUDIO) {
716 put_be16(pb, size / 2);
717 } else if (sc->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
718 int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
719 if (frame_type == FF_I_TYPE) {
722 } else if (frame_type == FF_B_TYPE) {
730 } else if (sc->codec->codec_id == CODEC_ID_DVVIDEO) {
731 put_byte(pb, size / 4096);
736 put_byte(pb, 1); /* flags */
737 put_byte(pb, 0); /* reserved */
741 static int gxf_write_media_packet(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt)
743 GXFStreamContext *sc = &ctx->streams[pkt->stream_index];
744 offset_t pos = url_ftell(pb);
747 gxf_write_packet_header(pb, PKT_MEDIA);
748 if (sc->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
749 padding = 4 - pkt->size % 4;
750 else if (sc->codec->codec_type == CODEC_TYPE_AUDIO)
751 padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
752 gxf_write_media_preamble(pb, ctx, pkt, pkt->size + padding);
753 put_buffer(pb, pkt->data, pkt->size);
754 gxf_write_padding(pb, padding);
755 return updatePacketSize(pb, pos);
758 static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
760 GXFContext *gxf = s->priv_data;
762 gxf_write_media_packet(&s->pb, gxf, pkt);
763 put_flush_packet(&s->pb);
767 static int gxf_new_audio_packet(GXFContext *gxf, GXFStreamContext *sc, AVPacket *pkt, int flush)
769 int size = flush ? av_fifo_size(&sc->audio_buffer) : GXF_AUDIO_PACKET_SIZE;
773 av_new_packet(pkt, size);
774 av_fifo_read(&sc->audio_buffer, pkt->data, size);
775 pkt->stream_index = sc->index;
776 pkt->dts = sc->current_dts;
777 sc->current_dts += size / 2; /* we only support 16 bit pcm mono for now */
781 static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
783 GXFContext *gxf = s->priv_data;
787 for (i = 0; i < s->nb_streams; i++) {
788 if (s->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO) {
789 GXFStreamContext *sc = &gxf->streams[i];
790 if (pkt && pkt->stream_index == i) {
791 av_fifo_write(&sc->audio_buffer, pkt->data, pkt->size);
794 if (flush || av_fifo_size(&sc->audio_buffer) >= GXF_AUDIO_PACKET_SIZE) {
795 if (gxf_new_audio_packet(gxf, sc, &new_pkt, flush) > 0) {
797 break; /* add pkt right now into list */
802 return av_interleave_packet_per_dts(s, out, pkt, flush);
805 AVOutputFormat gxf_muxer = {
818 gxf_interleave_packet,