avformat/xwma: Use ff_alloc_extradata()

This prevents the fields from potentially becoming inconsistent in case of errors

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-04-01 18:17:20 +02:00
parent 5b911f1d5b
commit b9fbd034bf

View File

@ -104,11 +104,10 @@ static int xwma_read_header(AVFormatContext *s)
avpriv_request_sample(s, "Unexpected extradata (%d bytes)",
st->codec->extradata_size);
} else {
st->codec->extradata_size = 6;
st->codec->extradata = av_mallocz(6 + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
if (ff_alloc_extradata(st->codec, 6))
return AVERROR(ENOMEM);
memset(st->codec->extradata, 0, st->codec->extradata_size);
/* setup extradata with our experimentally obtained value */
st->codec->extradata[4] = 31;
}