Add a test for VPXSSIM computation for HBD inputs

Change-Id: I61dc0f43d073b62d0eab8cd7471c2d76e03379bf

test/hbd_metrics_test.cc

+/*
+ *  Copyright (c) 2016 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 <new>
+
+#include "third_party/googletest/src/include/gtest/gtest.h"
+#include "test/acm_random.h"
+#include "test/util.h"
+#include "./vpx_config.h"
+#include "vpx_dsp/ssim.h"
+#include "vpx_ports/mem.h"
+#include "vpx_ports/msvc.h"
+#include "vpx_scale/yv12config.h"
+
+
+using libvpx_test::ACMRandom;
+
+namespace {
+
+typedef double (*LBDMetricFunc)(const YV12_BUFFER_CONFIG *source,
+                                const YV12_BUFFER_CONFIG *dest,
+                                double *weight);
+typedef double (*HBDMetricFunc)(const YV12_BUFFER_CONFIG *source,
+                                const YV12_BUFFER_CONFIG *dest,
+                                double *weight, unsigned int bd);
+
+class HBDMetricsTestBase {
+ public:
+  virtual ~HBDMetricsTestBase() {}
+
+ protected:
+  void RunAccuracyCheck() {
+    const int width = 1920;
+    const int height = 1080;
+    int i = 0;
+    const uint8_t kPixFiller = 128;
+    YV12_BUFFER_CONFIG lbd_src, lbd_dst;
+    YV12_BUFFER_CONFIG hbd_src, hbd_dst;
+    ACMRandom rnd(ACMRandom::DeterministicSeed());
+    double lbd_score, hbd_score, lbd_db, hbd_db, lbd_w, hbd_w;
+
+    memset(&lbd_src, 0, sizeof(lbd_src));
+    memset(&lbd_dst, 0, sizeof(lbd_dst));
+    memset(&hbd_src, 0, sizeof(hbd_src));
+    memset(&hbd_dst, 0, sizeof(hbd_dst));
+
+    vpx_alloc_frame_buffer(&lbd_src, width, height, 1, 1, 0, 32, 16);
+    vpx_alloc_frame_buffer(&lbd_dst, width, height, 1, 1, 0, 32, 16);
+    vpx_alloc_frame_buffer(&hbd_src, width, height, 1, 1, 1, 32, 16);
+    vpx_alloc_frame_buffer(&hbd_dst, width, height, 1, 1, 1, 32, 16);
+
+    memset(lbd_src.buffer_alloc, kPixFiller, lbd_src.buffer_alloc_sz);
+    while (i < lbd_src.buffer_alloc_sz) {
+      uint16_t spel, dpel;
+      spel = lbd_src.buffer_alloc[i];
+      // Create some distortion for dst buffer.
+      lbd_dst.buffer_alloc[i] = rnd.Rand8();
+      dpel = lbd_dst.buffer_alloc[i];
+      ((uint16_t*)(hbd_src.buffer_alloc))[i] = spel << (bit_depth_ - 8);
+      ((uint16_t*)(hbd_dst.buffer_alloc))[i] = dpel << (bit_depth_ - 8);
+      i++;
+    }
+
+    lbd_score = lbd_metric_(&lbd_src, &lbd_dst, &lbd_w);
+    hbd_score = hbd_metric_(&hbd_src, &hbd_dst, &hbd_w, bit_depth_);
+
+    lbd_db = 100 * pow(lbd_score / lbd_w, 8.0);
+    hbd_db = 100 * pow(hbd_score / hbd_w, 8.0);
+
+    vpx_free_frame_buffer(&lbd_src);
+    vpx_free_frame_buffer(&lbd_dst);
+    vpx_free_frame_buffer(&hbd_src);
+    vpx_free_frame_buffer(&hbd_dst);
+
+    EXPECT_LE(fabs(lbd_db - hbd_db), threshold_);
+  }
+
+  int bit_depth_;
+  double threshold_;
+  LBDMetricFunc lbd_metric_;
+  HBDMetricFunc hbd_metric_;
+};
+
+typedef std::tr1::tuple<LBDMetricFunc,
+                        HBDMetricFunc, int, double> MetricTestTParam;
+class HBDMetricsTest
+    : public HBDMetricsTestBase,
+      public ::testing::TestWithParam<MetricTestTParam> {
+ public:
+  virtual void SetUp() {
+    lbd_metric_ = GET_PARAM(0);
+    hbd_metric_ = GET_PARAM(1);
+    bit_depth_ = GET_PARAM(2);
+    threshold_ = GET_PARAM(3);
+  }
+  virtual void TearDown() {}
+};
+
+TEST_P(HBDMetricsTest, RunAccuracyCheck) {
+  RunAccuracyCheck();
+}
+
+// Allow small variation due to floating point operations.
+static const double kSsim_thresh = 0.001;
+
+INSTANTIATE_TEST_CASE_P(
+    C, HBDMetricsTest,
+    ::testing::Values(
+        MetricTestTParam(&vpx_calc_ssim, &vpx_highbd_calc_ssim, 10,
+                         kSsim_thresh),
+        MetricTestTParam(&vpx_calc_ssim, &vpx_highbd_calc_ssim, 12,
+                         kSsim_thresh)));
+}  // namespace
+

test/test.mk

@@ -171,11 +171,12 @@ LIBVPX_TEST_SRCS-$(CONFIG_ANS)          += vp10_ans_test.cc
 endif # VP10
 
 ## Multi-codec / unconditional whitebox tests.
-
 ifeq ($(findstring yes,$(CONFIG_VP9_ENCODER)$(CONFIG_VP10_ENCODER)),yes)
 LIBVPX_TEST_SRCS-yes += avg_test.cc
 endif
-
+ifeq ($(CONFIG_INTERNAL_STATS),yes)
+LIBVPX_TEST_SRCS-$(CONFIG_VP9_HIGHBITDEPTH) += hbd_metrics_test.cc
+endif
 LIBVPX_TEST_SRCS-$(CONFIG_ENCODERS) += sad_test.cc
 LIBVPX_TEST_SRCS-$(CONFIG_VP10) += vp10_txfm_test.h
 LIBVPX_TEST_SRCS-$(CONFIG_VP10) += vp10_fwd_txfm1d_test.cc