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h264: Lower bound check for slice offsets

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And use the value from the specification.

Sample-Id: 00000451-google
Found-by: Mateusz j00ru Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
(cherry picked from commit f777504f64)
(cherry picked from commit 5bd083d0216d9ee649039c84999fb61386536ac1)

Conflicts:
	libavcodec/h264.c
This commit is contained in:
Vittorio Giovara
2014-02-20 02:38:32 +01:00
committed by Reinhard Tartler
parent 8ba514117b
commit 7c70cee29c
2 changed files with 14 additions and 12 deletions
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8
libavcodec/h264_loopfilter.c
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@@ -254,8 +254,8 @@ static av_always_inline void h264_filter_mb_fast_internal(H264Context *h,
int top_type= h->top_type;
int qp_bd_offset = 6 * (h->sps.bit_depth_luma - 8);
int a = h->slice_alpha_c0_offset - qp_bd_offset;
int b = h->slice_beta_offset - qp_bd_offset;
int a = 52 + h->slice_alpha_c0_offset - qp_bd_offset;
int b = 52 + h->slice_beta_offset - qp_bd_offset;
int mb_type = s->current_picture.f.mb_type[mb_xy];
int qp = s->current_picture.f.qscale_table[mb_xy];
@@ -711,8 +711,8 @@ void ff_h264_filter_mb( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint
av_unused int dir;
int chroma = !(CONFIG_GRAY && (s->flags&CODEC_FLAG_GRAY));
int qp_bd_offset = 6 * (h->sps.bit_depth_luma - 8);
int a = h->slice_alpha_c0_offset - qp_bd_offset;
int b = h->slice_beta_offset - qp_bd_offset;
int a = 52 + h->slice_alpha_c0_offset - qp_bd_offset;
int b = 52 + h->slice_beta_offset - qp_bd_offset;
if (FRAME_MBAFF
// and current and left pair do not have the same interlaced type