gmc1

Originally committed as revision 1446 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/doc/optimization.txt b/doc/optimization.txt
index d2ee33f..8a718e1 100644 (file)
--- a/doc/optimization.txt
+++ b/doc/optimization.txt
@@ -68,12 +68,20 @@ get_pixels / diff_pixels
         
 clear_blocks
        easiest, to optimize
- 
+        
 gmc
        used for mpeg4 gmc
         optimizing this should have a significant effect on the gmc decoding speed but
         its very likely impossible to write in SIMD
 
+gmc1
+       used for chroma blocks in mpeg4 gmc with 1 warp point
+       (there are 4 luma & 2 chroma blocks per macrobock, so 
+        only 1/3 of the gmc blocks use this, the other 2/3 
+        use the normal put_pixel* code, but only if there is 
+        just 1 warp point)
+        Note: Divx5 gmc always uses just 1 warp point
+
 pix_sum
        used for encoding