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avformat/dtshddec: parse chunks stored after audio data

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Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2016-05-16 02:13:46 -03:00
parent 72e33eec3a
commit ab3c04c458
1 changed files with 16 additions and 4 deletions
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20
libavformat/dtshddec.c
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@ -38,6 +38,7 @@
#define TIMECODE 0x54494D45434F4445
typedef struct DTSHDDemuxContext {
uint64_t data_start;
uint64_t data_end;
} DTSHDDemuxContext;
@ -64,10 +65,13 @@ static int dtshd_read_header(AVFormatContext *s)
st->codecpar->codec_id = AV_CODEC_ID_DTS;
st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
while (!avio_feof(pb)) {
for (;;) {
chunk_type = avio_rb64(pb);
chunk_size = avio_rb64(pb);
if (avio_feof(pb))
break;
if (chunk_size < 4) {
av_log(s, AV_LOG_ERROR, "chunk size too small\n");
return AVERROR_INVALIDDATA;
@ -79,10 +83,13 @@ static int dtshd_read_header(AVFormatContext *s)
switch (chunk_type) {
case STRMDATA:
dtshd->data_end = chunk_size + avio_tell(pb);
dtshd->data_start = avio_tell(pb);
dtshd->data_end = dtshd->data_start + chunk_size;
if (dtshd->data_end <= chunk_size)
return AVERROR_INVALIDDATA;
return 0;
if (!pb->seekable)
return 0;
goto skip;
break;
case FILEINFO:
if (chunk_size > INT_MAX)
@ -103,7 +110,12 @@ skip:
};
}
return AVERROR_EOF;
if (!dtshd->data_end)
return AVERROR_EOF;
avio_seek(pb, dtshd->data_start, SEEK_SET);
return 0;
}
static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)