From ed68fccf76b489c64814a481bee16ac7fe717c24 Mon Sep 17 00:00:00 2001 From: "Ronald S. Bultje" Date: Tue, 5 May 2015 08:26:50 -0400 Subject: [PATCH] vp9: error out if chroma subsampling changes between frames. This can happen after an intra-only frame. For reference, see: https://groups.google.com/a/webmproject.org/forum/#!msg/webm-discuss/zaoTxREZjq8/v5Enht87AhcJ Signed-off-by: Michael Niedermayer --- libavcodec/vp9.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/libavcodec/vp9.c b/libavcodec/vp9.c index c2ac997970..71057f35ba 100644 --- a/libavcodec/vp9.c +++ b/libavcodec/vp9.c @@ -31,6 +31,7 @@ #include "vp9data.h" #include "vp9dsp.h" #include "libavutil/avassert.h" +#include "libavutil/pixdesc.h" #define VP9_SYNCCODE 0x498342 @@ -641,7 +642,13 @@ static int decode_frame_header(AVCodecContext *ctx, AVFrame *ref = s->refs[s->refidx[i]].f; int refw = ref->width, refh = ref->height; - if (refw == w && refh == h) { + if (ref->format != fmt) { + av_log(ctx, AV_LOG_ERROR, + "Ref pixfmt (%s) did not match current frame (%s)", + av_get_pix_fmt_name(ref->format), + av_get_pix_fmt_name(fmt)); + return AVERROR_INVALIDDATA; + } else if (refw == w && refh == h) { s->mvscale[i][0] = s->mvscale[i][1] = 0; } else { if (w * 2 < refw || h * 2 < refh || w > 16 * refw || h > 16 * refh) {