From 42361bdf51c4495ca71a532efbb7769475c1822c Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 23 Feb 2014 18:14:59 +0100 Subject: [PATCH] avcodec/mpegvideo: fix buffer clear code so it should work with negative linesizes Signed-off-by: Michael Niedermayer --- libavcodec/mpegvideo.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c index ebaeedd08b..441e7fc8f3 100644 --- a/libavcodec/mpegvideo.c +++ b/libavcodec/mpegvideo.c @@ -1774,14 +1774,15 @@ int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx) return -1; } - memset(s->last_picture_ptr->f.data[0], 0x80, - avctx->height * s->last_picture_ptr->f.linesize[0]); - memset(s->last_picture_ptr->f.data[1], 0x80, - (avctx->height >> v_chroma_shift) * - s->last_picture_ptr->f.linesize[1]); - memset(s->last_picture_ptr->f.data[2], 0x80, - (avctx->height >> v_chroma_shift) * - s->last_picture_ptr->f.linesize[2]); + for(i=0; iheight; i++) + memset(s->last_picture_ptr->f.data[0] + s->last_picture_ptr->f.linesize[0]*i, + 0x80, avctx->width); + for(i=0; iheight, v_chroma_shift); i++) { + memset(s->last_picture_ptr->f.data[1] + s->last_picture_ptr->f.linesize[1]*i, + 0x80, FF_CEIL_RSHIFT(avctx->width, h_chroma_shift)); + memset(s->last_picture_ptr->f.data[2] + s->last_picture_ptr->f.linesize[2]*i, + 0x80, FF_CEIL_RSHIFT(avctx->width, h_chroma_shift)); + } if(s->codec_id == AV_CODEC_ID_FLV1 || s->codec_id == AV_CODEC_ID_H263){ for(i=0; iheight; i++)