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avcodec/clearvideo: Only output a frame if one is coded in the packet 

Fixes: Timeout (183 ms instead of about 20 sec)
Fixes: 3147/clusterfuzz-testcase-4870592182353920

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-09-10 01:32:52 +02:00
parent c225da68cf
commit f0efd795f4
1 changed files with 11 additions and 10 deletions
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21
libavcodec/clearvideo.c
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@ -290,11 +290,6 @@ static int clv_decode_frame(AVCodecContext *avctx, void *data,
}
frame_type = bytestream2_get_byte(&gb);
if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
return ret;
c->pic->key_frame = frame_type & 0x20 ? 1 : 0;
c->pic->pict_type = frame_type & 0x20 ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
if (frame_type & 0x2) {
if (buf_size < c->mb_width * c->mb_height) {
@ -302,6 +297,12 @@ static int clv_decode_frame(AVCodecContext *avctx, void *data,
return AVERROR_INVALIDDATA;
}
if ((ret = ff_reget_buffer(avctx, c->pic)) < 0)
return ret;
c->pic->key_frame = frame_type & 0x20 ? 1 : 0;
c->pic->pict_type = frame_type & 0x20 ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
bytestream2_get_be32(&gb); // frame size;
c->ac_quant = bytestream2_get_byte(&gb);
c->luma_dc_quant = 32;
@ -323,14 +324,14 @@ static int clv_decode_frame(AVCodecContext *avctx, void *data,
mb_ret = ret;
}
}
if ((ret = av_frame_ref(data, c->pic)) < 0)
return ret;
*got_frame = 1;
} else {
}
if ((ret = av_frame_ref(data, c->pic)) < 0)
return ret;
*got_frame = 1;
return mb_ret < 0 ? mb_ret : buf_size;
}