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openSUSE:Leap:42.1:Update
ffmpeg
0001-avcodec-cavsdsp-use-av_clip_uint8-for-idct...
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File 0001-avcodec-cavsdsp-use-av_clip_uint8-for-idct.patch of Package ffmpeg
From 69b00a7fb6faa1b19b5687a5762ff4f94d5ff9aa Mon Sep 17 00:00:00 2001 From: Michael Niedermayer <michael@niedermayer.cc> Date: Mon, 19 Sep 2016 15:25:38 +0200 Subject: [PATCH] avcodec/cavsdsp: use av_clip_uint8() for idct MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Fixes out of array read Fixes: 1.swf Found-by: 连一汉 <lianyihan@360.cn> Tested-by: 连一汉 <lianyihan@360.cn> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> (cherry picked from commit 0e318f110bcd6bb8e7de9127f2747272e60f48d7) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavcodec/cavsdsp.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) diff --git a/libavcodec/cavsdsp.c b/libavcodec/cavsdsp.c index 91f6d73..df9490a 100644 --- a/libavcodec/cavsdsp.c +++ b/libavcodec/cavsdsp.c @@ -188,7 +188,6 @@ static void cavs_filter_ch_c(uint8_t *d, int stride, int alpha, int beta, int tc static void cavs_idct8_add_c(uint8_t *dst, int16_t *block, int stride) { int i; int16_t (*src)[8] = (int16_t(*)[8])block; - const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP; src[0][0] += 8; @@ -243,14 +242,14 @@ static void cavs_idct8_add_c(uint8_t *dst, int16_t *block, int stride) { const int b2 = a5 - a7; const int b3 = a4 - a6; - dst[i + 0*stride] = cm[ dst[i + 0*stride] + ((b0 + b4) >> 7)]; - dst[i + 1*stride] = cm[ dst[i + 1*stride] + ((b1 + b5) >> 7)]; - dst[i + 2*stride] = cm[ dst[i + 2*stride] + ((b2 + b6) >> 7)]; - dst[i + 3*stride] = cm[ dst[i + 3*stride] + ((b3 + b7) >> 7)]; - dst[i + 4*stride] = cm[ dst[i + 4*stride] + ((b3 - b7) >> 7)]; - dst[i + 5*stride] = cm[ dst[i + 5*stride] + ((b2 - b6) >> 7)]; - dst[i + 6*stride] = cm[ dst[i + 6*stride] + ((b1 - b5) >> 7)]; - dst[i + 7*stride] = cm[ dst[i + 7*stride] + ((b0 - b4) >> 7)]; + dst[i + 0*stride] = av_clip_uint8( dst[i + 0*stride] + ((b0 + b4) >> 7)); + dst[i + 1*stride] = av_clip_uint8( dst[i + 1*stride] + ((b1 + b5) >> 7)); + dst[i + 2*stride] = av_clip_uint8( dst[i + 2*stride] + ((b2 + b6) >> 7)); + dst[i + 3*stride] = av_clip_uint8( dst[i + 3*stride] + ((b3 + b7) >> 7)); + dst[i + 4*stride] = av_clip_uint8( dst[i + 4*stride] + ((b3 - b7) >> 7)); + dst[i + 5*stride] = av_clip_uint8( dst[i + 5*stride] + ((b2 - b6) >> 7)); + dst[i + 6*stride] = av_clip_uint8( dst[i + 6*stride] + ((b1 - b5) >> 7)); + dst[i + 7*stride] = av_clip_uint8( dst[i + 7*stride] + ((b0 - b4) >> 7)); } } -- 2.6.6
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