Add a benchmark which test do 3*3 median filter in image.

It's basic image test for uchar, ushort and uint.

v2:
convert uint to float before do median filter and
use intermediate variable in if loop.

Signed-off-by: Meng Mengmeng <mengmeng.meng@intel.com>
Reviewed-by: Ruiling Song <ruiling.song@intel.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/kernels/bench_copy_image.cl b/kernels/bench_copy_image.cl
index fb6d4f39..e6548f3c 100644
--- a/kernels/bench_copy_image.cl
+++ b/kernels/bench_copy_image.cl
@@ -1,3 +1,4 @@
+const constant float filter_flag = 0.111111f;
 __kernel void
 bench_copy_image(__read_only image2d_t src, __write_only image2d_t dst)
 {
@@ -13,3 +14,39 @@ bench_copy_image(__read_only image2d_t src, __write_only image2d_t dst)
   color=read_imageui(src, sampler, coord);
   write_imageui(dst, coord, color);
 }
+
+__kernel void
+bench_filter_image(__read_only image2d_t src, __write_only image2d_t dst)
+{
+  float4 color = 0;
+  int2 coord_00, coord_01, coord_02, coord_10, coord_11, coord_12, coord_20, coord_21, coord_22;
+  int x = (int)get_global_id(0);
+  int y = (int)get_global_id(1);
+  int x_sz = (int)get_global_size(0);
+  int y_sz = (int)get_global_size(1);
+
+  const sampler_t sampler = CLK_NORMALIZED_COORDS_FALSE| CLK_ADDRESS_CLAMP| CLK_FILTER_NEAREST;
+
+  int x0 = x - 1; int x1 = x + 1;
+  int y0 = y - 1; int y1 = y + 1 ;
+  int x_left = (x > 0)?x0:x; int x_right = (x > x_sz - 2)?x:x1;
+  int y_top = (y > 0)?y0:y; int y_bottom = (y > y_sz - 2)?y:y1;
+
+  coord_00.x = x_left;  coord_00.y = y_top;
+  coord_01.x = x; coord_01.y = y_top;
+  coord_02.x = x_right; coord_02.y = y_top;
+
+  coord_10.x = x_left; coord_10.y = y;
+  coord_11.x = x; coord_11.y = y;
+  coord_12.x = x_right; coord_12.y = y;
+
+  coord_20.x = x_left; coord_20.y = y_bottom;
+  coord_21.x = x; coord_21.y = y_bottom;
+  coord_22.x = x_right; coord_22.y = y_bottom;
+
+  color = convert_float4(read_imageui(src, sampler, coord_00)) + convert_float4(read_imageui(src, sampler, coord_01)) + convert_float4(read_imageui(src, sampler, coord_02))
+        + convert_float4(read_imageui(src, sampler, coord_10)) + convert_float4(read_imageui(src, sampler, coord_11)) + convert_float4(read_imageui(src, sampler, coord_12))
+        + convert_float4(read_imageui(src, sampler, coord_20)) + convert_float4(read_imageui(src, sampler, coord_21)) + convert_float4(read_imageui(src, sampler, coord_22));
+
+  write_imageui(dst, coord_11, convert_uint4(color * filter_flag));
+}