From 37f4a976b374398a846b354cf16417b9a81d57e2 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Fri, 4 May 2012 12:32:43 -0400 Subject: [PATCH] zerocodec: check if the previous frame is missing ZeroCodec relies on the keyframe flag being set in the container, and prev is the previously decoded frame. A keyframe flags incorrectly set will lead to this condition. Signed-off-by: Paul B Mahol Signed-off-by: Luca Barbato --- libavcodec/zerocodec.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/zerocodec.c b/libavcodec/zerocodec.c index 6c57e05197..487cb32797 100644 --- a/libavcodec/zerocodec.c +++ b/libavcodec/zerocodec.c @@ -65,6 +65,10 @@ static int zerocodec_decode_frame(AVCodecContext *avctx, void *data, pic->key_frame = 1; pic->pict_type = AV_PICTURE_TYPE_I; } else { + if (!prev) { + av_log(avctx, AV_LOG_ERROR, "Missing reference frame!\n"); + return AVERROR_INVALIDDATA; + } pic->key_frame = 0; pic->pict_type = AV_PICTURE_TYPE_P; }