Add unit test for VP8 denoiser.

The unit test is to check the bitexactness of SSE2 code with C code.

Change-Id: I13cc08a557b02357e5d6c2db7a49e93ce0d8e16f

1 files changed, 119 insertions, 0 deletions

diff --git a/test/vp8_denoiser_sse2_test.cc b/test/vp8_denoiser_sse2_test.cc
new file mode 100644
index 000000000..d04a5051d
--- /dev/null
+++ b/test/vp8_denoiser_sse2_test.cc
@@ -0,0 +1,119 @@
+/*
+ *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "third_party/googletest/src/include/gtest/gtest.h"
+#include "test/acm_random.h"
+#include "test/clear_system_state.h"
+#include "test/register_state_check.h"
+#include "test/util.h"
+
+#include "vp8/encoder/denoising.h"
+#include "vp8/common/reconinter.h"
+#include "vpx/vpx_integer.h"
+#include "vpx_mem/vpx_mem.h"
+
+using libvpx_test::ACMRandom;
+
+namespace {
+
+const int kNumPixels = 16 * 16;
+class VP8DenoiserTest
+    : public ::testing::TestWithParam<int> {
+ public:
+  virtual ~VP8DenoiserTest() {}
+
+  virtual void SetUp() {
+    increase_denoising = GetParam();
+  }
+
+  virtual void TearDown() { libvpx_test::ClearSystemState(); }
+
+ protected:
+  int increase_denoising;
+};
+
+TEST_P(VP8DenoiserTest, BitexactCheck) {
+  ACMRandom rnd(ACMRandom::DeterministicSeed());
+  const int count_test_block = 4000;
+  const int stride = 16;
+
+  // Allocate the space for input and output,
+  // where sig_block_c/_sse2 is the block to be denoised,
+  // mc_avg_block is the denoised reference block,
+  // avg_block_c is the denoised result from C code,
+  // avg_block_sse2 is the denoised result from SSE2 code.
+  DECLARE_ALIGNED_ARRAY(16, uint8_t, sig_block_c, kNumPixels);
+  // Since in VP8 denoiser, the source signal will be changed,
+  // we need another copy of the source signal as the input of sse2 code.
+  DECLARE_ALIGNED_ARRAY(16, uint8_t, sig_block_sse2, kNumPixels);
+  DECLARE_ALIGNED_ARRAY(16, uint8_t, mc_avg_block, kNumPixels);
+  DECLARE_ALIGNED_ARRAY(16, uint8_t, avg_block_c, kNumPixels);
+  DECLARE_ALIGNED_ARRAY(16, uint8_t, avg_block_sse2, kNumPixels);
+
+  for (int i = 0; i < count_test_block; ++i) {
+    // Generate random motion magnitude, 20% of which exceed the threshold.
+    uint8_t motion_magnitude_random
+              = rnd.Rand8() % (uint8_t)(MOTION_MAGNITUDE_THRESHOLD * 1.2);
+
+    // Initialize a test block with random number in range [0, 255].
+    for (int j = 0; j < kNumPixels; ++j) {
+      int temp = 0;
+      sig_block_sse2[j] = sig_block_c[j] = rnd.Rand8();
+      // The pixels in mc_avg_block are generated by adding a random
+      // number in range [-19, 19] to corresponding pixels in sig_block.
+      temp = sig_block_c[j] + (rnd.Rand8() % 2 == 0? -1 : 1) *
+             (rnd.Rand8()%20);
+      // Clip.
+      mc_avg_block[j] = (temp < 0? 0 : (temp > 255? 255 : temp));
+    }
+
+    // Test denosiser on Y component.
+    ASM_REGISTER_STATE_CHECK(vp8_denoiser_filter_c(mc_avg_block, stride,
+                               avg_block_c, stride, sig_block_c, stride,
+                               motion_magnitude_random, increase_denoising));
+
+    ASM_REGISTER_STATE_CHECK(vp8_denoiser_filter_sse2(mc_avg_block, stride,
+                               avg_block_sse2, stride, sig_block_sse2, stride,
+                               motion_magnitude_random, increase_denoising));
+
+    // Check bitexactness.
+    for (int h = 0; h < 16; ++h) {
+      for (int w = 0; w < 16; ++w) {
+        EXPECT_EQ(avg_block_c[h * stride + w], avg_block_sse2[h * stride + w]);
+      }
+    }
+
+    // Test denosiser on UV component.
+    ASM_REGISTER_STATE_CHECK(vp8_denoiser_filter_uv_c(mc_avg_block, stride,
+                               avg_block_c, stride, sig_block_c, stride,
+                               motion_magnitude_random, increase_denoising));
+
+    ASM_REGISTER_STATE_CHECK(vp8_denoiser_filter_uv_sse2(mc_avg_block, stride,
+                               avg_block_sse2, stride, sig_block_sse2, stride,
+                               motion_magnitude_random, increase_denoising));
+
+    // Check bitexactness.
+    for (int h = 0; h < 16; ++h) {
+      for (int w = 0; w < 16; ++w) {
+        EXPECT_EQ(avg_block_c[h * stride + w], avg_block_sse2[h * stride + w]);
+      }
+    }
+  }
+}
+
+// Test for all block size.
+INSTANTIATE_TEST_CASE_P(
+    SSE2, VP8DenoiserTest,
+    ::testing::Values(0, 1));
+}  // namespace