summaryrefslogtreecommitdiffstats
path: root/media/libvpx/libvpx/test/vp8_fdct4x4_test.cc
diff options
context:
space:
mode:
Diffstat (limited to 'media/libvpx/libvpx/test/vp8_fdct4x4_test.cc')
-rw-r--r--media/libvpx/libvpx/test/vp8_fdct4x4_test.cc211
1 files changed, 211 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/test/vp8_fdct4x4_test.cc b/media/libvpx/libvpx/test/vp8_fdct4x4_test.cc
new file mode 100644
index 0000000000..1b73a72a01
--- /dev/null
+++ b/media/libvpx/libvpx/test/vp8_fdct4x4_test.cc
@@ -0,0 +1,211 @@
+/*
+ * Copyright (c) 2013 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 <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "third_party/googletest/src/include/gtest/gtest.h"
+
+#include "./vpx_config.h"
+#include "./vp8_rtcd.h"
+#include "test/acm_random.h"
+#include "vpx/vpx_integer.h"
+#include "vpx_ports/mem.h"
+
+namespace {
+
+typedef void (*FdctFunc)(int16_t *a, int16_t *b, int a_stride);
+
+const int cospi8sqrt2minus1 = 20091;
+const int sinpi8sqrt2 = 35468;
+
+void reference_idct4x4(const int16_t *input, int16_t *output) {
+ const int16_t *ip = input;
+ int16_t *op = output;
+
+ for (int i = 0; i < 4; ++i) {
+ const int a1 = ip[0] + ip[8];
+ const int b1 = ip[0] - ip[8];
+ const int temp1 = (ip[4] * sinpi8sqrt2) >> 16;
+ const int temp2 = ip[12] + ((ip[12] * cospi8sqrt2minus1) >> 16);
+ const int c1 = temp1 - temp2;
+ const int temp3 = ip[4] + ((ip[4] * cospi8sqrt2minus1) >> 16);
+ const int temp4 = (ip[12] * sinpi8sqrt2) >> 16;
+ const int d1 = temp3 + temp4;
+ op[0] = a1 + d1;
+ op[12] = a1 - d1;
+ op[4] = b1 + c1;
+ op[8] = b1 - c1;
+ ++ip;
+ ++op;
+ }
+ ip = output;
+ op = output;
+ for (int i = 0; i < 4; ++i) {
+ const int a1 = ip[0] + ip[2];
+ const int b1 = ip[0] - ip[2];
+ const int temp1 = (ip[1] * sinpi8sqrt2) >> 16;
+ const int temp2 = ip[3] + ((ip[3] * cospi8sqrt2minus1) >> 16);
+ const int c1 = temp1 - temp2;
+ const int temp3 = ip[1] + ((ip[1] * cospi8sqrt2minus1) >> 16);
+ const int temp4 = (ip[3] * sinpi8sqrt2) >> 16;
+ const int d1 = temp3 + temp4;
+ op[0] = (a1 + d1 + 4) >> 3;
+ op[3] = (a1 - d1 + 4) >> 3;
+ op[1] = (b1 + c1 + 4) >> 3;
+ op[2] = (b1 - c1 + 4) >> 3;
+ ip += 4;
+ op += 4;
+ }
+}
+
+using libvpx_test::ACMRandom;
+
+class FdctTest : public ::testing::TestWithParam<FdctFunc> {
+ public:
+ virtual void SetUp() {
+ fdct_func_ = GetParam();
+ rnd_.Reset(ACMRandom::DeterministicSeed());
+ }
+
+ protected:
+ FdctFunc fdct_func_;
+ ACMRandom rnd_;
+};
+
+TEST_P(FdctTest, SignBiasCheck) {
+ int16_t test_input_block[16];
+ DECLARE_ALIGNED(16, int16_t, test_output_block[16]);
+ const int pitch = 8;
+ int count_sign_block[16][2];
+ const int count_test_block = 1000000;
+
+ memset(count_sign_block, 0, sizeof(count_sign_block));
+
+ for (int i = 0; i < count_test_block; ++i) {
+ // Initialize a test block with input range [-255, 255].
+ for (int j = 0; j < 16; ++j) {
+ test_input_block[j] = rnd_.Rand8() - rnd_.Rand8();
+ }
+
+ fdct_func_(test_input_block, test_output_block, pitch);
+
+ for (int j = 0; j < 16; ++j) {
+ if (test_output_block[j] < 0) {
+ ++count_sign_block[j][0];
+ } else if (test_output_block[j] > 0) {
+ ++count_sign_block[j][1];
+ }
+ }
+ }
+
+ bool bias_acceptable = true;
+ for (int j = 0; j < 16; ++j) {
+ bias_acceptable =
+ bias_acceptable &&
+ (abs(count_sign_block[j][0] - count_sign_block[j][1]) < 10000);
+ }
+
+ EXPECT_EQ(true, bias_acceptable)
+ << "Error: 4x4 FDCT has a sign bias > 1% for input range [-255, 255]";
+
+ memset(count_sign_block, 0, sizeof(count_sign_block));
+
+ for (int i = 0; i < count_test_block; ++i) {
+ // Initialize a test block with input range [-15, 15].
+ for (int j = 0; j < 16; ++j) {
+ test_input_block[j] = (rnd_.Rand8() >> 4) - (rnd_.Rand8() >> 4);
+ }
+
+ fdct_func_(test_input_block, test_output_block, pitch);
+
+ for (int j = 0; j < 16; ++j) {
+ if (test_output_block[j] < 0) {
+ ++count_sign_block[j][0];
+ } else if (test_output_block[j] > 0) {
+ ++count_sign_block[j][1];
+ }
+ }
+ }
+
+ bias_acceptable = true;
+ for (int j = 0; j < 16; ++j) {
+ bias_acceptable =
+ bias_acceptable &&
+ (abs(count_sign_block[j][0] - count_sign_block[j][1]) < 100000);
+ }
+
+ EXPECT_EQ(true, bias_acceptable)
+ << "Error: 4x4 FDCT has a sign bias > 10% for input range [-15, 15]";
+}
+
+TEST_P(FdctTest, RoundTripErrorCheck) {
+ int max_error = 0;
+ double total_error = 0;
+ const int count_test_block = 1000000;
+ for (int i = 0; i < count_test_block; ++i) {
+ int16_t test_input_block[16];
+ int16_t test_output_block[16];
+ DECLARE_ALIGNED(16, int16_t, test_temp_block[16]);
+
+ // Initialize a test block with input range [-255, 255].
+ for (int j = 0; j < 16; ++j) {
+ test_input_block[j] = rnd_.Rand8() - rnd_.Rand8();
+ }
+
+ const int pitch = 8;
+ fdct_func_(test_input_block, test_temp_block, pitch);
+ reference_idct4x4(test_temp_block, test_output_block);
+
+ for (int j = 0; j < 16; ++j) {
+ const int diff = test_input_block[j] - test_output_block[j];
+ const int error = diff * diff;
+ if (max_error < error) max_error = error;
+ total_error += error;
+ }
+ }
+
+ EXPECT_GE(1, max_error)
+ << "Error: FDCT/IDCT has an individual roundtrip error > 1";
+
+ EXPECT_GE(count_test_block, total_error)
+ << "Error: FDCT/IDCT has average roundtrip error > 1 per block";
+}
+
+INSTANTIATE_TEST_SUITE_P(C, FdctTest, ::testing::Values(vp8_short_fdct4x4_c));
+
+#if HAVE_NEON
+INSTANTIATE_TEST_SUITE_P(NEON, FdctTest,
+ ::testing::Values(vp8_short_fdct4x4_neon));
+#endif // HAVE_NEON
+
+#if HAVE_SSE2
+INSTANTIATE_TEST_SUITE_P(SSE2, FdctTest,
+ ::testing::Values(vp8_short_fdct4x4_sse2));
+#endif // HAVE_SSE2
+
+#if HAVE_MSA
+INSTANTIATE_TEST_SUITE_P(MSA, FdctTest,
+ ::testing::Values(vp8_short_fdct4x4_msa));
+#endif // HAVE_MSA
+#if HAVE_MMI
+INSTANTIATE_TEST_SUITE_P(MMI, FdctTest,
+ ::testing::Values(vp8_short_fdct4x4_mmi));
+#endif // HAVE_MMI
+
+#if HAVE_LSX
+INSTANTIATE_TEST_SUITE_P(LSX, FdctTest,
+ ::testing::Values(vp8_short_fdct4x4_lsx));
+#endif // HAVE_LSX
+} // namespace