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Dirac encapsulation in MPEG-TS

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patch by Anuradha Suraparaju, anuradha rd.bbc.co uk

Originally committed as revision 14734 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Anuradha Suraparaju 2008-08-13 19:29:35 +00:00 committed by Diego Biurrun
parent ce15710f55
commit f4bba2015a
3 changed files with 62 additions and 2 deletions
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21
libavformat/mpegts.c
View File

@ -482,6 +482,7 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
int comp_page = 0, anc_page = 0; /* initialize to kill warnings */
char language[4] = {0}; /* initialize to kill warnings */
int has_hdmv_descr = 0;
int has_dirac_descr = 0;
#ifdef DEBUG_SI
av_log(ts->stream, AV_LOG_DEBUG, "PMT: len %i\n", section_len);
@ -589,6 +590,18 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
language[2] = get8(&p, desc_end);
language[3] = 0;
break;
case REGISTRATION_DESCRIPTOR: /*MPEG-2 Registration descriptor */
{
uint8_t bytes[4];
bytes[0] = get8(&p, desc_end);
bytes[1] = get8(&p, desc_end);
bytes[2] = get8(&p, desc_end);
bytes[3] = get8(&p, desc_end);
if(bytes[0] == 'd' && bytes[1] == 'r' &&
bytes[2] == 'a' && bytes[3] == 'c')
has_dirac_descr = 1;
break;
}
default:
break;
}
@ -610,12 +623,14 @@ static void pmt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len
case STREAM_TYPE_VIDEO_MPEG4:
case STREAM_TYPE_VIDEO_H264:
case STREAM_TYPE_VIDEO_VC1:
case STREAM_TYPE_VIDEO_DIRAC:
case STREAM_TYPE_AUDIO_AAC:
case STREAM_TYPE_AUDIO_AC3:
case STREAM_TYPE_AUDIO_DTS:
case STREAM_TYPE_AUDIO_HDMV_DTS:
case STREAM_TYPE_SUBTITLE_DVB:
if(stream_type == STREAM_TYPE_AUDIO_HDMV_DTS && !has_hdmv_descr)
if((stream_type == STREAM_TYPE_AUDIO_HDMV_DTS && !has_hdmv_descr)
|| (stream_type == STREAM_TYPE_VIDEO_DIRAC && !has_dirac_descr))
break;
if(ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES){
pes= ts->pids[pid]->u.pes_filter.opaque;
@ -944,6 +959,10 @@ static AVStream* new_pes_av_stream(PESContext *pes, uint32_t code)
codec_type = CODEC_TYPE_VIDEO;
codec_id = CODEC_ID_VC1;
break;
case STREAM_TYPE_VIDEO_DIRAC:
codec_type = CODEC_TYPE_VIDEO;
codec_id = CODEC_ID_DIRAC;
break;
case STREAM_TYPE_AUDIO_AAC:
codec_type = CODEC_TYPE_AUDIO;
codec_id = CODEC_ID_AAC;

1
libavformat/mpegts.h
View File

@ -52,6 +52,7 @@
#define STREAM_TYPE_VIDEO_MPEG4 0x10
#define STREAM_TYPE_VIDEO_H264 0x1b
#define STREAM_TYPE_VIDEO_VC1 0xea
#define STREAM_TYPE_VIDEO_DIRAC 0xd1
#define STREAM_TYPE_AUDIO_AC3 0x81
#define STREAM_TYPE_AUDIO_DTS 0x8a

42
libavformat/mpegtsenc.c
View File

@ -220,6 +220,9 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
case CODEC_ID_H264:
stream_type = STREAM_TYPE_VIDEO_H264;
break;
case CODEC_ID_DIRAC:
stream_type = STREAM_TYPE_VIDEO_DIRAC;
break;
case CODEC_ID_MP2:
case CODEC_ID_MP3:
stream_type = STREAM_TYPE_AUDIO_MPEG1;
@ -267,6 +270,16 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
put16(&q, 1); /* ancillary page id */
}
break;
case CODEC_TYPE_VIDEO:
if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
*q++ = 0x05; /*MPEG-2 registration descriptor*/
*q++ = 4;
*q++ = 'd';
*q++ = 'r';
*q++ = 'a';
*q++ = 'c';
}
break;
}
val = 0xf000 | (q - desc_length_ptr - 2);
@ -527,13 +540,17 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
*q++ = 0;
}
if (is_start) {
int pes_extension = 0;
/* write PES header */
*q++ = 0x00;
*q++ = 0x00;
*q++ = 0x01;
private_code = 0;
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
*q++ = 0xe0;
if (st->codec->codec_id == CODEC_ID_DIRAC) {
*q++ = 0xfd;
} else
*q++ = 0xe0;
} else if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
(st->codec->codec_id == CODEC_ID_MP2 ||
st->codec->codec_id == CODEC_ID_MP3)) {
@ -554,6 +571,19 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
header_len += 5;
flags |= 0x40;
}
if (st->codec->codec_type == CODEC_TYPE_VIDEO &&
st->codec->codec_id == CODEC_ID_DIRAC) {
/* set PES_extension_flag */
pes_extension = 1;
flags |= 0x01;
/*
* One byte for PES2 extension flag +
* one byte for extension length +
* one byte for extension id
*/
header_len += 3;
}
len = payload_size + header_len + 3;
if (private_code != 0)
len++;
@ -574,6 +604,16 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
write_pts(q, 1, dts);
q += 5;
}
if (pes_extension && st->codec->codec_id == CODEC_ID_DIRAC) {
flags = 0x01; /* set PES_extension_flag_2 */
*q++ = flags;
*q++ = 0x80 | 0x01; /* marker bit + extension length */
/*
* Set the stream id extension flag bit to 0 and
* write the extended stream id
*/
*q++ = 0x00 | 0x60;
}
if (private_code != 0)
*q++ = private_code;
is_start = 0;