[FFmpeg-cvslog] r19213 - trunk/libavcodec/vc1dec.c

[darkshikari]

Author: darkshikari
Date: Wed Jun 17 07:54:42 2009
New Revision: 19213

Log:
VC-1/WMV: Remove redundant ff_init_block_index() calls.
These are only supposed to be called once per row, not once per macroblock.
~1.5% faster according to oprofile.

Modified:
   trunk/libavcodec/vc1dec.c

Modified: trunk/libavcodec/vc1dec.c
==============================================================================
--- trunk/libavcodec/vc1dec.c	Wed Jun 17 02:37:06 2009	(r19212)
+++ trunk/libavcodec/vc1dec.c	Wed Jun 17 07:54:42 2009	(r19213)
@@ -2617,8 +2617,9 @@ static void vc1_decode_i_blocks(VC1Conte
     s->mb_intra = 1;
     s->first_slice_line = 1;
     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
-        for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
-            ff_init_block_index(s);
+        s->mb_x = 0;
+        ff_init_block_index(s);
+        for(; s->mb_x < s->mb_width; s->mb_x++) {
             ff_update_block_index(s);
             s->dsp.clear_blocks(s->block[0]);
             mb_pos = s->mb_x + s->mb_y * s->mb_width;
@@ -2730,8 +2731,9 @@ static void vc1_decode_i_blocks_adv(VC1C
     s->mb_intra = 1;
     s->first_slice_line = 1;
     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
-        for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
-            ff_init_block_index(s);
+        s->mb_x = 0;
+        ff_init_block_index(s);
+        for(;s->mb_x < s->mb_width; s->mb_x++) {
             ff_update_block_index(s);
             s->dsp.clear_blocks(s->block[0]);
             mb_pos = s->mb_x + s->mb_y * s->mb_stride;
@@ -2849,8 +2851,9 @@ static void vc1_decode_p_blocks(VC1Conte
     s->first_slice_line = 1;
     memset(v->cbp_base, 0, sizeof(v->cbp_base[0])*2*s->mb_stride);
     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
-        for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
-            ff_init_block_index(s);
+        s->mb_x = 0;
+        ff_init_block_index(s);
+        for(; s->mb_x < s->mb_width; s->mb_x++) {
             ff_update_block_index(s);
 
             vc1_decode_p_mb(v);
@@ -2898,8 +2901,9 @@ static void vc1_decode_b_blocks(VC1Conte
 
     s->first_slice_line = 1;
     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
-        for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
-            ff_init_block_index(s);
+        s->mb_x = 0;
+        ff_init_block_index(s);
+        for(; s->mb_x < s->mb_width; s->mb_x++) {
             ff_update_block_index(s);
 
             vc1_decode_b_mb(v);