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
27
#define GXF_AUDIO_PACKET_SIZE 65536
29
typedef struct GXFStreamContext {
30
AVCodecContext *codec;
31
AVFifoBuffer audio_buffer;
51
typedef struct GXFContext {
53
uint32_t material_flags;
54
uint16_t audio_tracks;
56
int64_t creation_time;
57
uint32_t umf_start_offset;
58
uint32_t umf_track_offset;
59
uint32_t umf_media_offset;
60
uint32_t umf_user_data_offset;
61
uint32_t umf_user_data_size;
63
uint16_t umf_track_size;
64
uint16_t umf_media_size;
69
GXFStreamContext streams[48];
72
typedef struct GXF_Lines {
78
/* FIXME check if it is relevant */
79
static const GXF_Lines gxf_lines_tab[] = {
80
{ 480, 1 }, /* NTSC */
81
{ 512, 1 }, /* NTSC + VBI */
83
{ 608, 2 }, /* PAL + VBI */
88
static const AVCodecTag gxf_media_types[] = {
89
{ CODEC_ID_MJPEG , 3 }, /* NTSC */
90
{ CODEC_ID_MJPEG , 4 }, /* PAL */
91
{ CODEC_ID_PCM_S24LE , 9 },
92
{ CODEC_ID_PCM_S16LE , 10 },
93
{ CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */
94
{ CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */
95
{ CODEC_ID_DVVIDEO , 13 }, /* NTSC */
96
{ CODEC_ID_DVVIDEO , 14 }, /* PAL */
97
{ CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */
98
{ CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */
99
{ CODEC_ID_AC3 , 17 },
100
//{ CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */
101
{ CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */
102
{ CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */
103
{ CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */
107
#define SERVER_PATH "/space/"
108
#define ES_NAME_PATTERN "ES."
110
static int gxf_find_lines_index(GXFStreamContext *ctx)
114
for (i = 0; i < 6; ++i) {
115
if (ctx->codec->height == gxf_lines_tab[i].height) {
116
ctx->lines_index = gxf_lines_tab[i].index;
123
static void gxf_write_padding(ByteIOContext *pb, offset_t to_pad)
125
for (; to_pad > 0; to_pad--) {
130
static offset_t updatePacketSize(ByteIOContext *pb, offset_t pos)
135
size = url_ftell(pb) - pos;
137
gxf_write_padding(pb, 4 - size % 4);
138
size = url_ftell(pb) - pos;
140
curpos = url_ftell(pb);
141
url_fseek(pb, pos + 6, SEEK_SET);
143
url_fseek(pb, curpos, SEEK_SET);
147
static offset_t updateSize(ByteIOContext *pb, offset_t pos)
151
curpos = url_ftell(pb);
152
url_fseek(pb, pos, SEEK_SET);
153
put_be16(pb, curpos - pos - 2);
154
url_fseek(pb, curpos, SEEK_SET);
158
static void gxf_write_packet_header(ByteIOContext *pb, pkt_type_t type)
160
put_be32(pb, 0); /* packet leader for synchro */
162
put_byte(pb, type); /* map packet */
163
put_be32(pb, 0); /* size */
164
put_be32(pb, 0); /* reserved */
165
put_byte(pb, 0xE1); /* trailer 1 */
166
put_byte(pb, 0xE2); /* trailer 2 */
169
static int gxf_write_mpeg_auxiliary(ByteIOContext *pb, GXFStreamContext *ctx)
175
ctx->p_per_gop = ctx->pframes / ctx->iframes;
176
if (ctx->pframes % ctx->iframes)
179
ctx->b_per_gop = ctx->bframes / ctx->pframes;
180
if (ctx->p_per_gop > 9)
181
ctx->p_per_gop = 9; /* ensure value won't take more than one char */
182
if (ctx->b_per_gop > 9)
183
ctx->b_per_gop = 9; /* ensure value won't take more than one char */
185
size = snprintf(buffer, 1024, "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
186
"Pix 0\nCf %d\nCg %d\nSl 7\nnl16 %d\nVi 1\nf1 1\n",
187
(float)ctx->codec->bit_rate, ctx->p_per_gop, ctx->b_per_gop,
188
ctx->codec->pix_fmt == PIX_FMT_YUV422P ? 2 : 1, ctx->first_gop_closed == 1,
189
ctx->codec->height / 16);
190
put_byte(pb, TRACK_MPG_AUX);
191
put_byte(pb, size + 1);
192
put_buffer(pb, (uint8_t *)buffer, size + 1);
196
static int gxf_write_timecode_auxiliary(ByteIOContext *pb, GXFStreamContext *ctx)
198
/* FIXME implement that */
199
put_byte(pb, 0); /* fields */
200
put_byte(pb, 0); /* seconds */
201
put_byte(pb, 0); /* minutes */
202
put_byte(pb, 0); /* flags + hours */
208
static int gxf_write_track_description(ByteIOContext *pb, GXFStreamContext *stream)
212
/* track description section */
213
put_byte(pb, stream->media_type + 0x80);
214
put_byte(pb, stream->index + 0xC0);
217
put_be16(pb, 0); /* size */
219
/* media file name */
220
put_byte(pb, TRACK_NAME);
221
put_byte(pb, strlen(ES_NAME_PATTERN) + 3);
222
put_tag(pb, ES_NAME_PATTERN);
223
put_be16(pb, stream->media_info);
226
if (stream->codec->codec_id != CODEC_ID_MPEG2VIDEO) {
227
/* auxiliary information */
228
put_byte(pb, TRACK_AUX);
230
if (stream->codec->codec_id == CODEC_ID_NONE)
231
gxf_write_timecode_auxiliary(pb, stream);
236
/* file system version */
237
put_byte(pb, TRACK_VER);
241
if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO)
242
gxf_write_mpeg_auxiliary(pb, stream);
245
put_byte(pb, TRACK_FPS);
247
put_be32(pb, stream->frame_rate_index);
249
/* lines per frame */
250
put_byte(pb, TRACK_LINES);
252
put_be32(pb, stream->lines_index);
254
/* fields per frame */
255
put_byte(pb, TRACK_FPF);
257
put_be32(pb, stream->fields);
259
return updateSize(pb, pos);
262
static int gxf_write_material_data_section(ByteIOContext *pb, GXFContext *ctx)
265
const char *filename = strrchr(ctx->fc->filename, '/');
268
put_be16(pb, 0); /* size */
274
filename = ctx->fc->filename;
275
put_byte(pb, MAT_NAME);
276
put_byte(pb, strlen(SERVER_PATH) + strlen(filename) + 1);
277
put_tag(pb, SERVER_PATH);
278
put_tag(pb, filename);
282
put_byte(pb, MAT_FIRST_FIELD);
287
put_byte(pb, MAT_LAST_FIELD);
289
put_be32(pb, ctx->nb_frames);
292
put_byte(pb, MAT_MARK_IN);
296
put_byte(pb, MAT_MARK_OUT);
298
put_be32(pb, ctx->nb_frames);
301
put_byte(pb, MAT_SIZE);
303
put_be32(pb, url_fsize(pb) / 1024);
305
return updateSize(pb, pos);
308
static int gxf_write_track_description_section(ByteIOContext *pb, GXFContext *ctx)
314
put_be16(pb, 0); /* size */
315
for (i = 0; i < ctx->fc->nb_streams; ++i)
316
gxf_write_track_description(pb, &ctx->streams[i]);
317
return updateSize(pb, pos);
320
static int gxf_write_map_packet(ByteIOContext *pb, GXFContext *ctx)
322
offset_t pos = url_ftell(pb);
324
gxf_write_packet_header(pb, PKT_MAP);
327
put_byte(pb, 0xE0); /* version */
328
put_byte(pb, 0xFF); /* reserved */
330
gxf_write_material_data_section(pb, ctx);
331
gxf_write_track_description_section(pb, ctx);
333
return updatePacketSize(pb, pos);
337
static int gxf_write_flt_packet(ByteIOContext *pb, GXFContext *ctx)
339
offset_t pos = url_ftell(pb);
342
gxf_write_packet_header(pb, PKT_FLT);
344
put_le32(pb, 1000); /* number of fields */
345
put_le32(pb, 0); /* number of active flt entries */
347
for (i = 0; i < 1000; ++i) {
350
return updatePacketSize(pb, pos);
354
static int gxf_write_umf_material_description(ByteIOContext *pb, GXFContext *ctx)
356
put_le32(pb, ctx->flags);
357
put_le32(pb, ctx->nb_frames); /* length of the longest track */
358
put_le32(pb, ctx->nb_frames); /* length of the shortest track */
359
put_le32(pb, 0); /* mark in */
360
put_le32(pb, ctx->nb_frames); /* mark out */
361
put_le32(pb, 0); /* timecode mark in */
362
put_le32(pb, ctx->nb_frames); /* timecode mark out */
363
put_le64(pb, ctx->fc->timestamp); /* modification time */
364
put_le64(pb, ctx->fc->timestamp); /* creation time */
365
put_le16(pb, 0); /* reserved */
366
put_le16(pb, 0); /* reserved */
367
put_le16(pb, ctx->audio_tracks);
368
put_le16(pb, 0); /* timecode track count */
369
put_le16(pb, 0); /* reserved */
370
put_le16(pb, ctx->mpeg_tracks);
374
static int gxf_write_umf_payload(ByteIOContext *pb, GXFContext *ctx)
376
put_le32(pb, ctx->umf_length); /* total length of the umf data */
377
put_le32(pb, 3); /* version */
378
put_le32(pb, ctx->fc->nb_streams);
379
put_le32(pb, ctx->umf_track_offset); /* umf track section offset */
380
put_le32(pb, ctx->umf_track_size);
381
put_le32(pb, ctx->fc->nb_streams);
382
put_le32(pb, ctx->umf_media_offset);
383
put_le32(pb, ctx->umf_media_size);
384
put_le32(pb, ctx->umf_user_data_offset); /* user data offset */
385
put_le32(pb, ctx->umf_user_data_size); /* user data size */
386
put_le32(pb, 0); /* reserved */
387
put_le32(pb, 0); /* reserved */
391
static int gxf_write_umf_track_description(ByteIOContext *pb, GXFContext *ctx)
393
offset_t pos = url_ftell(pb);
397
ctx->umf_track_offset = pos - ctx->umf_start_offset;
398
for (i = 0; i < ctx->fc->nb_streams; ++i) {
399
AVStream *st = ctx->fc->streams[i];
400
GXFStreamContext *sc = &ctx->streams[i];
403
switch (st->codec->codec_id) {
404
case CODEC_ID_MPEG1VIDEO: id= 'L'; break;
405
case CODEC_ID_MPEG2VIDEO: id= 'M'; break;
406
case CODEC_ID_PCM_S16LE: id= 'A'; break;
407
case CODEC_ID_DVVIDEO: id= sc->track_type == 6 ? 'E' : 'D'; break;
408
case CODEC_ID_MJPEG: id= 'V'; break;
411
sc->media_info= id << 8;
412
/* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
413
sc->media_info |= '0' + (tracks[id]++);
414
put_le16(pb, sc->media_info);
417
return url_ftell(pb) - pos;
420
static int gxf_write_umf_media_mpeg(ByteIOContext *pb, GXFStreamContext *stream)
422
if (stream->codec->pix_fmt == PIX_FMT_YUV422P)
425
put_le32(pb, 1); /* default to 420 */
426
put_le32(pb, stream->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
427
put_le32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
428
put_le32(pb, 1); /* I picture per GOP */
429
put_le32(pb, stream->p_per_gop);
430
put_le32(pb, stream->b_per_gop);
431
if (stream->codec->codec_id == CODEC_ID_MPEG2VIDEO)
433
else if (stream->codec->codec_id == CODEC_ID_MPEG1VIDEO)
437
put_le32(pb, 0); /* reserved */
441
static int gxf_write_umf_media_timecode(ByteIOContext *pb, GXFStreamContext *track)
443
/* FIXME implement */
444
put_be32(pb, 0); /* drop frame flag */
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 */
451
put_be32(pb, 0); /* reserved */
455
static int gxf_write_umf_media_dv(ByteIOContext *pb, GXFStreamContext *track)
459
for (i = 0; i < 8; i++) {
465
static int gxf_write_umf_media_audio(ByteIOContext *pb, GXFStreamContext *track)
467
put_le64(pb, av_dbl2int(1)); /* sound level to begin to */
468
put_le64(pb, av_dbl2int(1)); /* sound level to begin to */
469
put_le32(pb, 0); /* number of fields over which to ramp up sound level */
470
put_le32(pb, 0); /* number of fields over which to ramp down sound level */
471
put_le32(pb, 0); /* reserved */
472
put_le32(pb, 0); /* reserved */
477
static int gxf_write_umf_media_mjpeg(ByteIOContext *pb, GXFStreamContext *track)
479
put_be64(pb, 0); /* FIXME FLOAT max chroma quant level */
480
put_be64(pb, 0); /* FIXME FLOAT max luma quant level */
481
put_be64(pb, 0); /* FIXME FLOAT min chroma quant level */
482
put_be64(pb, 0); /* FIXME FLOAT min luma quant level */
487
static int gxf_write_umf_media_description(ByteIOContext *pb, GXFContext *ctx)
493
ctx->umf_media_offset = pos - ctx->umf_start_offset;
494
for (i = 0; i < ctx->fc->nb_streams; ++i) {
495
GXFStreamContext *sc = &ctx->streams[i];
497
offset_t startpos, curpos;
498
int path_size = strlen(ES_NAME_PATTERN);
500
memset(buffer, 0, 88);
501
startpos = url_ftell(pb);
502
put_le16(pb, 0); /* length */
503
put_le16(pb, sc->media_info);
504
put_le16(pb, 0); /* reserved */
505
put_le16(pb, 0); /* reserved */
506
put_le32(pb, ctx->nb_frames);
507
put_le32(pb, 0); /* attributes rw, ro */
508
put_le32(pb, 0); /* mark in */
509
put_le32(pb, ctx->nb_frames); /* mark out */
510
strncpy(buffer, ES_NAME_PATTERN, path_size);
511
put_buffer(pb, (uint8_t *)buffer, path_size);
512
put_be16(pb, sc->media_info);
513
put_buffer(pb, (uint8_t *)buffer + path_size + 2, 88 - path_size - 2);
514
put_le32(pb, sc->track_type);
515
put_le32(pb, sc->sample_rate);
516
put_le32(pb, sc->sample_size);
517
put_le32(pb, 0); /* reserved */
518
switch (sc->codec->codec_id) {
519
case CODEC_ID_MPEG2VIDEO:
520
gxf_write_umf_media_mpeg(pb, sc);
522
case CODEC_ID_PCM_S16LE:
523
gxf_write_umf_media_audio(pb, sc);
525
case CODEC_ID_DVVIDEO:
526
gxf_write_umf_media_dv(pb, sc);
529
gxf_write_umf_media_timecode(pb, sc); /* 8 0bytes */
531
curpos = url_ftell(pb);
532
url_fseek(pb, startpos, SEEK_SET);
533
put_le16(pb, curpos - startpos);
534
url_fseek(pb, curpos, SEEK_SET);
536
return url_ftell(pb) - pos;
539
static int gxf_write_umf_user_data(ByteIOContext *pb, GXFContext *ctx)
541
offset_t pos = url_ftell(pb);
542
ctx->umf_user_data_offset = pos - ctx->umf_start_offset;
555
static int gxf_write_umf_packet(ByteIOContext *pb, GXFContext *ctx)
557
offset_t pos = url_ftell(pb);
559
gxf_write_packet_header(pb, PKT_UMF);
562
put_byte(pb, 3); /* first and last (only) packet */
563
put_be32(pb, ctx->umf_length); /* data length */
565
ctx->umf_start_offset = url_ftell(pb);
566
gxf_write_umf_payload(pb, ctx);
567
gxf_write_umf_material_description(pb, ctx);
568
ctx->umf_track_size = gxf_write_umf_track_description(pb, ctx);
569
ctx->umf_media_size = gxf_write_umf_media_description(pb, ctx);
570
ctx->umf_user_data_size = gxf_write_umf_user_data(pb, ctx);
571
ctx->umf_length = url_ftell(pb) - ctx->umf_start_offset;
572
return updatePacketSize(pb, pos);
575
#define GXF_NODELAY -5000
577
static int gxf_write_header(AVFormatContext *s)
579
ByteIOContext *pb = &s->pb;
580
GXFContext *gxf = s->priv_data;
584
gxf->flags |= 0x00080000; /* material is simple clip */
585
for (i = 0; i < s->nb_streams; ++i) {
586
AVStream *st = s->streams[i];
587
GXFStreamContext *sc = &gxf->streams[i];
589
sc->codec = st->codec;
591
sc->media_type = codec_get_tag(gxf_media_types, sc->codec->codec_id);
592
if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
593
if (st->codec->codec_id != CODEC_ID_PCM_S16LE) {
594
av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
597
if (st->codec->sample_rate != 48000) {
598
av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
601
if (st->codec->channels != 1) {
602
av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
606
sc->sample_rate = st->codec->sample_rate;
607
av_set_pts_info(st, 64, 1, sc->sample_rate);
608
sc->sample_size = 16;
609
sc->frame_rate_index = -2;
610
sc->lines_index = -2;
613
gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
614
av_fifo_init(&sc->audio_buffer, 3*GXF_AUDIO_PACKET_SIZE);
615
} else if (sc->codec->codec_type == CODEC_TYPE_VIDEO) {
616
/* FIXME check from time_base ? */
617
if (sc->codec->height == 480 || sc->codec->height == 512) { /* NTSC or NTSC+VBI */
618
sc->frame_rate_index = 5;
619
sc->sample_rate = 60;
620
gxf->flags |= 0x00000080;
621
} else { /* assume PAL */
622
sc->frame_rate_index = 6;
624
sc->sample_rate = 50;
625
gxf->flags |= 0x00000040;
627
gxf->sample_rate = sc->sample_rate;
628
av_set_pts_info(st, 64, 1, st->codec->time_base.den);
629
sc->dts_delay = GXF_NODELAY;
630
if (gxf_find_lines_index(sc) < 0)
631
sc->lines_index = -1;
632
sc->sample_size = st->codec->bit_rate;
633
sc->fields = 2; /* interlaced */
634
switch (sc->codec->codec_id) {
635
case CODEC_ID_MPEG2VIDEO:
636
sc->first_gop_closed = -1;
639
gxf->flags |= 0x00008000;
641
case CODEC_ID_DVVIDEO:
642
if (sc->codec->pix_fmt == PIX_FMT_YUV422P) {
645
gxf->flags |= 0x00002000;
648
gxf->flags |= 0x00001000;
652
av_log(s, AV_LOG_ERROR, "video codec not supported\n");
657
gxf_write_map_packet(pb, gxf);
658
//gxf_write_flt_packet(pb, gxf);
659
gxf_write_umf_packet(pb, gxf);
660
put_flush_packet(pb);
664
static int gxf_write_eos_packet(ByteIOContext *pb, GXFContext *ctx)
666
offset_t pos = url_ftell(pb);
668
gxf_write_packet_header(pb, PKT_EOS);
669
return updatePacketSize(pb, pos);
672
static int gxf_write_trailer(AVFormatContext *s)
674
ByteIOContext *pb = &s->pb;
675
GXFContext *gxf = s->priv_data;
679
for (i = 0; i < s->nb_streams; ++i) {
680
if (s->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO) {
681
av_fifo_free(&gxf->streams[i].audio_buffer);
682
} else if (s->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO) {
683
gxf->nb_frames = 2 * s->streams[i]->codec->frame_number;
687
gxf_write_eos_packet(pb, gxf);
689
url_fseek(pb, 0, SEEK_SET);
690
/* overwrite map and umf packets with new values */
691
gxf_write_map_packet(pb, gxf);
692
//gxf_write_flt_packet(pb, gxf);
693
gxf_write_umf_packet(pb, gxf);
694
url_fseek(pb, end, SEEK_SET);
698
static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
702
for(i=0; i<size-4 && c!=0x100; i++){
704
if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
705
sc->first_gop_closed= (buf[i+4]>>6)&1;
707
return (buf[i+1]>>3)&7;
710
static int gxf_write_media_preamble(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt, int size)
712
GXFStreamContext *sc = &ctx->streams[pkt->stream_index];
713
int64_t dts = av_rescale_rnd(pkt->dts, ctx->sample_rate, sc->codec->time_base.den, AV_ROUND_UP);
715
put_byte(pb, sc->media_type);
716
put_byte(pb, sc->index);
718
if (sc->codec->codec_type == CODEC_TYPE_AUDIO) {
720
put_be16(pb, size / 2);
721
} else if (sc->codec->codec_id == CODEC_ID_MPEG2VIDEO) {
722
int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
723
if (frame_type == FF_I_TYPE) {
726
} else if (frame_type == FF_B_TYPE) {
734
} else if (sc->codec->codec_id == CODEC_ID_DVVIDEO) {
735
put_byte(pb, size / 4096);
740
put_byte(pb, 1); /* flags */
741
put_byte(pb, 0); /* reserved */
745
static int gxf_write_media_packet(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt)
747
GXFStreamContext *sc = &ctx->streams[pkt->stream_index];
748
offset_t pos = url_ftell(pb);
751
gxf_write_packet_header(pb, PKT_MEDIA);
752
if (sc->codec->codec_id == CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
753
padding = 4 - pkt->size % 4;
754
else if (sc->codec->codec_type == CODEC_TYPE_AUDIO)
755
padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
756
gxf_write_media_preamble(pb, ctx, pkt, pkt->size + padding);
757
put_buffer(pb, pkt->data, pkt->size);
758
gxf_write_padding(pb, padding);
759
return updatePacketSize(pb, pos);
762
static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
764
GXFContext *gxf = s->priv_data;
766
gxf_write_media_packet(&s->pb, gxf, pkt);
767
put_flush_packet(&s->pb);
771
static int gxf_new_audio_packet(GXFContext *gxf, GXFStreamContext *sc, AVPacket *pkt, int flush)
773
int size = flush ? av_fifo_size(&sc->audio_buffer) : GXF_AUDIO_PACKET_SIZE;
777
av_new_packet(pkt, size);
778
av_fifo_read(&sc->audio_buffer, pkt->data, size);
779
pkt->stream_index = sc->index;
780
pkt->dts = sc->current_dts;
781
sc->current_dts += size / 2; /* we only support 16 bit pcm mono for now */
785
static int gxf_interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
787
GXFContext *gxf = s->priv_data;
791
for (i = 0; i < s->nb_streams; i++) {
792
AVStream *st = s->streams[i];
793
GXFStreamContext *sc = &gxf->streams[i];
794
if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
795
if (pkt && pkt->stream_index == i) {
796
av_fifo_write(&sc->audio_buffer, pkt->data, pkt->size);
799
if (flush || av_fifo_size(&sc->audio_buffer) >= GXF_AUDIO_PACKET_SIZE) {
800
if (!pkt && gxf_new_audio_packet(gxf, sc, &new_pkt, flush) > 0) {
802
break; /* add pkt right now into list */
805
} else if (pkt && pkt->stream_index == i) {
806
if (sc->dts_delay == GXF_NODELAY) /* adjust dts if needed */
807
sc->dts_delay = pkt->dts;
808
pkt->dts -= sc->dts_delay;
811
return av_interleave_packet_per_dts(s, out, pkt, flush);
814
AVOutputFormat gxf_muxer = {
827
gxf_interleave_packet,