diff options
| -rw-r--r-- | libavcodec/vp8.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libavcodec/vp8.c b/libavcodec/vp8.c index 0c2f503..45a19a0 100644 --- a/libavcodec/vp8.c +++ b/libavcodec/vp8.c @@ -521,6 +521,13 @@ static int vp7_decode_frame_header(VP8Context *s, const uint8_t *buf, int buf_si int alpha = (int8_t)vp8_rac_get_uint(c, 8); int beta = (int8_t)vp8_rac_get_uint(c, 8); if (!s->keyframe && (alpha || beta)) { + + if (!s->framep[VP56_FRAME_PREVIOUS] || + !s->framep[VP56_FRAME_GOLDEN]) { + av_log(s->avctx, AV_LOG_WARNING, "Discarding interframe without a prior keyframe!\n"); + return AVERROR_INVALIDDATA; + } + /* preserve the golden frame */ if (s->framep[VP56_FRAME_GOLDEN] == s->framep[VP56_FRAME_PREVIOUS]) { AVFrame *gold = s->framep[VP56_FRAME_GOLDEN]->tf.f; |
