Add 4x4 IDCT

Originally committed as revision 11198 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 14 insertions, 0 deletions

diff --git a/libavcodec/simple_idct.c b/libavcodec/simple_idct.c
index 50d785761a..7bf0836aa4 100644
--- a/libavcodec/simple_idct.c
+++ b/libavcodec/simple_idct.c
@@ -585,3 +585,17 @@ void ff_simple_idct48_add(uint8_t *dest, int line_size, DCTELEM *block)
     }
 }
 
+void ff_simple_idct44_add(uint8_t *dest, int line_size, DCTELEM *block)
+{
+    int i;
+
+    /* IDCT4 on each line */
+    for(i=0; i<4; i++) {
+        idct4row(block + i*8);
+    }
+
+    /* IDCT4 and store */
+    for(i=0; i<4; i++){
+        idct4col_add(dest + i, line_size, block + i);
+    }
+}