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avformat/rmdec: MLTI with multiple MDPR support 

Fixes Ticket4496

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-08-14 04:37:08 +02:00
parent 02fff49936
commit 856452cf63
1 changed files with 39 additions and 9 deletions
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48
libavformat/rmdec.c
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@ -501,6 +501,7 @@ static int rm_read_header(AVFormatContext *s)
int flags = 0;
int ret = -1;
unsigned size, v;
int64_t codec_pos;
tag = avio_rl32(pb);
if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
@ -573,6 +574,7 @@ static int rm_read_header(AVFormatContext *s)
return AVERROR(ENOMEM);
size = avio_rb32(pb);
codec_pos = avio_tell(pb);
ffio_ensure_seekback(pb, 4);
v = avio_rb32(pb);
@ -580,20 +582,45 @@ static int rm_read_header(AVFormatContext *s)
int number_of_streams = avio_rb16(pb);
int number_of_mdpr;
int i;
unsigned size2;
for (i = 0; i<number_of_streams; i++)
avio_rb16(pb);
number_of_mdpr = avio_rb16(pb);
if (number_of_mdpr != 1) {
avpriv_request_sample(s, "MLTI with multiple (%d) MDPR", number_of_mdpr);
}
avio_rb32(pb);
size -= 4+2+2*number_of_streams+2+4;
} else
avio_skip(pb, -4);
for (i = 0; i < number_of_mdpr; i++) {
AVStream *st2;
if (i > 0) {
st2 = avformat_new_stream(s, NULL);
if (!st2) {
ret = AVERROR(ENOMEM);
goto fail;
}
st2->id = st->id + (i<<16);
st2->codec->bit_rate = st->codec->bit_rate;
st2->start_time = st->start_time;
st2->duration = st->duration;
st2->codec->codec_type = AVMEDIA_TYPE_DATA;
st2->priv_data = ff_rm_alloc_rmstream();
if (!st2->priv_data)
return AVERROR(ENOMEM);
} else
st2 = st;
size2 = avio_rb32(pb);
if (ff_rm_read_mdpr_codecdata(s, s->pb, st2, st2->priv_data,
size2, mime) < 0)
goto fail;
}
avio_seek(pb, codec_pos + size, SEEK_SET);
} else {
avio_skip(pb, -4);
if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
size, mime) < 0)
goto fail;
}
if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
size, mime) < 0)
goto fail;
break;
case MKTAG('D', 'A', 'T', 'A'):
goto header_end;
@ -651,9 +678,11 @@ static int rm_sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stre
while(!avio_feof(pb)){
int len, num, i;
int mlti_id;
*pos= avio_tell(pb) - 3;
if(rm->remaining_len > 0){
num= rm->current_stream;
mlti_id = 0;
len= rm->remaining_len;
*timestamp = AV_NOPTS_VALUE;
*flags= 0;
@ -689,12 +718,13 @@ static int rm_sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stre
num = avio_rb16(pb);
*timestamp = avio_rb32(pb);
avio_r8(pb); /* reserved */
mlti_id = (avio_r8(pb)>>1)-1<<16;
mlti_id = FFMAX(mlti_id, 0);
*flags = avio_r8(pb); /* flags */
}
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
if (num == st->id)
if (mlti_id + num == st->id)
break;
}
if (i == s->nb_streams) {