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asfdec: deobfuscate reading video properties size

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This code will be later split out into a function which takes a 'size'
argument, so I'm keeping the name 'sizeX' here.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
(cherry picked from commit 0b1d291a71)
This commit is contained in:
Anton Khirnov 2011-02-09 21:55:56 +01:00 committed by Michael Niedermayer
parent e5d4a95334
commit 4ca29c6534
1 changed files with 4 additions and 5 deletions
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9
libavformat/asfdec.c
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@ -398,7 +398,7 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
ByteIOContext *pb = s->pb;
AVStream *st;
ASFStream *asf_st;
int size, i;
int i;
int64_t gsize;
ff_get_guid(pb, &g);
@ -559,7 +559,7 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
get_le32(pb);
get_le32(pb);
get_byte(pb);
size = get_le16(pb); /* size */
get_le16(pb); /* size */
sizeX= get_le32(pb); /* size */
st->codec->width = get_le32(pb);
st->codec->height = get_le32(pb);
@ -569,9 +569,8 @@ static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
tag1 = get_le32(pb);
url_fskip(pb, 20);
// av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
size= sizeX;
if (size > 40) {
st->codec->extradata_size = size - 40;
if (sizeX > 40) {
st->codec->extradata_size = sizeX - 40;
st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
}