From 86b0e9948b14bcc483e779b092d7a196eea4aa61 Mon Sep 17 00:00:00 2001
From: Haruhiko Yamagata <h.yamagata@nifty.com>
Date: Sun, 24 May 2009 03:39:20 +0000
Subject: [PATCH] H264: Don't deblock if alpha or beta is 0. This ensures that
the MMX loop filter is always bitexact with the C version. Patch by Haruhiko
Yamagata <h.yamagata _a_ nifty com>
Originally committed as revision 18923 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavcodec/h264.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 550c4990db4..f4c172b6062 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -6003,6 +6003,7 @@ static void filter_mb_edgev( H264Context *h, uint8_t *pix, int stride, int16_t b
const int index_a = qp + h->slice_alpha_c0_offset;
const int alpha = (alpha_table+52)[index_a];
const int beta = (beta_table+52)[qp + h->slice_beta_offset];
+ if (alpha ==0 || beta == 0) return;
if( bS[0] < 4 ) {
int8_t tc[4];
@@ -6019,6 +6020,7 @@ static void filter_mb_edgecv( H264Context *h, uint8_t *pix, int stride, int16_t
const int index_a = qp + h->slice_alpha_c0_offset;
const int alpha = (alpha_table+52)[index_a];
const int beta = (beta_table+52)[qp + h->slice_beta_offset];
+ if (alpha ==0 || beta == 0) return;
if( bS[0] < 4 ) {
int8_t tc[4];
@@ -6187,6 +6189,7 @@ static void filter_mb_edgeh( H264Context *h, uint8_t *pix, int stride, int16_t b
const int index_a = qp + h->slice_alpha_c0_offset;
const int alpha = (alpha_table+52)[index_a];
const int beta = (beta_table+52)[qp + h->slice_beta_offset];
+ if (alpha ==0 || beta == 0) return;
if( bS[0] < 4 ) {
int8_t tc[4];
@@ -6204,6 +6207,7 @@ static void filter_mb_edgech( H264Context *h, uint8_t *pix, int stride, int16_t
const int index_a = qp + h->slice_alpha_c0_offset;
const int alpha = (alpha_table+52)[index_a];
const int beta = (beta_table+52)[qp + h->slice_beta_offset];
+ if (alpha ==0 || beta == 0) return;
if( bS[0] < 4 ) {
int8_t tc[4];
--
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