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avformat/smacker: Don't read only one byte at a time

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Instead use ffio_read_size to read data into a buffer. Also check that
the desired size was actually successfully read and combine the check
with the check for reading the extradata.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-06-22 04:25:22 +02:00
parent 09a39042db
commit 638ef5f758
1 changed files with 5 additions and 8 deletions
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13
libavformat/smacker.c
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@ -215,15 +215,12 @@ static int smacker_read_header(AVFormatContext *s)
for (i = 0; i < smk->frames; i++) {
smk->frm_size[i] = avio_rl32(pb);
}
for (i = 0; i < smk->frames; i++) {
smk->frm_flags[i] = avio_r8(pb);
}
/* load trees to extradata, they will be unpacked by decoder */
ret = avio_read(pb, par->extradata + 16, par->extradata_size - 16);
if (ret != par->extradata_size - 16) {
if ((ret = ffio_read_size(pb, smk->frm_flags, smk->frames)) < 0 ||
/* load trees to extradata, they will be unpacked by decoder */
(ret = ffio_read_size(pb, par->extradata + 16,
par->extradata_size - 16)) < 0) {
av_freep(&smk->frm_size);
return AVERROR(EIO);
return ret;
}
return 0;