pdp config

svn path=/trunk/externals/pdp/; revision=440

1 files changed, 31 insertions, 0 deletions

diff --git a/system/pdp_resample.c b/system/pdp_resample.c
index 12bc639..16a34df 100644
--- a/system/pdp_resample.c
+++ b/system/pdp_resample.c
@@ -137,3 +137,34 @@ void pdp_resample_zoom_tiled_bilin(s16 *src_image, s16 *dst_image, s32 w, s32 h,
 
 }
 */
+
+
+void pdp_resample_halve(s16 *src_image, s16 *dst_image, s32 src_w, s32 src_h)
+{
+
+    int dst_x,dst_y;
+    int src_x = 0;
+    int src_y = 0;
+    int dst_w = src_w >> 1;
+    int dst_h = src_h >> 1;
+    s32 tmp1,tmp2,tmp3,tmp4;
+
+    for(dst_y = 0; dst_y < dst_h * dst_w; dst_y += dst_w){
+	for (dst_x = 0; dst_x < dst_w; dst_x++){
+
+	    tmp1 = (s32)src_image[src_y + src_x];
+	    tmp2 = (s32)src_image[src_y + src_x + 1];
+	    tmp3 = (s32)src_image[src_y + src_x + src_w];
+	    tmp4 = (s32)src_image[src_y + src_x + src_w + 1];
+
+	    tmp1 += tmp2;
+	    tmp3 += tmp4;
+
+	    src_x += 2;
+
+	    dst_image[dst_x+dst_y] = (s16)((tmp1 + tmp3)>>2);
+	}
+	src_y += src_w << 1;
+	src_x = 0;
+    }
+}