29b6e73c2c
Change-Id: I7a9ea03b92160f1052e56665b19a155211ee241f
191 lines
5.7 KiB
C++
191 lines
5.7 KiB
C++
/*
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* Copyright (c) 2012 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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#include "third_party/googletest/src/include/gtest/gtest.h"
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extern "C" {
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#include "vp9_rtcd.h"
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}
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#include "acm_random.h"
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#include "vpx/vpx_integer.h"
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using libvpx_test::ACMRandom;
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namespace {
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void fdct4x4(int16_t *in, int16_t *out, uint8_t */*dst*/,
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int stride, int /*tx_type*/) {
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vp9_short_fdct4x4_c(in, out, stride);
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}
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void idct4x4_add(int16_t */*in*/, int16_t *out, uint8_t *dst,
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int stride, int /*tx_type*/) {
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vp9_short_idct4x4_add_c(out, dst, stride >> 1);
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}
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void fht4x4(int16_t *in, int16_t *out, uint8_t */*dst*/,
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int stride, int tx_type) {
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vp9_short_fht4x4_c(in, out, stride >> 1, tx_type);
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}
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void iht4x4_add(int16_t */*in*/, int16_t *out, uint8_t *dst,
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int stride, int tx_type) {
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vp9_short_iht4x4_add_c(out, dst, stride >> 1, tx_type);
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}
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class FwdTrans4x4Test : public ::testing::TestWithParam<int> {
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public:
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FwdTrans4x4Test() { SetUpTestTxfm(); }
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~FwdTrans4x4Test() {}
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void SetUpTestTxfm() {
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tx_type_ = GetParam();
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if (tx_type_ == 0) {
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fwd_txfm_ = fdct4x4;
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inv_txfm_ = idct4x4_add;
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} else {
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fwd_txfm_ = fht4x4;
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inv_txfm_ = iht4x4_add;
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}
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}
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protected:
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void RunFwdTxfm(int16_t *in, int16_t *out, uint8_t *dst,
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int stride, int tx_type) {
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(*fwd_txfm_)(in, out, dst, stride, tx_type);
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}
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void RunInvTxfm(int16_t *in, int16_t *out, uint8_t *dst,
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int stride, int tx_type) {
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(*inv_txfm_)(in, out, dst, stride, tx_type);
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}
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int tx_type_;
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void (*fwd_txfm_)(int16_t *in, int16_t *out, uint8_t *dst,
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int stride, int tx_type);
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void (*inv_txfm_)(int16_t *in, int16_t *out, uint8_t *dst,
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int stride, int tx_type);
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};
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TEST_P(FwdTrans4x4Test, SignBiasCheck) {
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ACMRandom rnd(ACMRandom::DeterministicSeed());
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int16_t test_input_block[16];
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int16_t test_output_block[16];
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const int pitch = 8;
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int count_sign_block[16][2];
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const int count_test_block = 1000000;
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memset(count_sign_block, 0, sizeof(count_sign_block));
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for (int i = 0; i < count_test_block; ++i) {
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// Initialize a test block with input range [-255, 255].
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for (int j = 0; j < 16; ++j)
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test_input_block[j] = rnd.Rand8() - rnd.Rand8();
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RunFwdTxfm(test_input_block, test_output_block, NULL, pitch, tx_type_);
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for (int j = 0; j < 16; ++j) {
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if (test_output_block[j] < 0)
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++count_sign_block[j][0];
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else if (test_output_block[j] > 0)
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++count_sign_block[j][1];
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}
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}
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for (int j = 0; j < 16; ++j) {
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const bool bias_acceptable = (abs(count_sign_block[j][0] -
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count_sign_block[j][1]) < 10000);
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EXPECT_TRUE(bias_acceptable)
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<< "Error: 4x4 FDCT/FHT has a sign bias > 1%"
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<< " for input range [-255, 255] at index " << j
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<< " tx_type " << tx_type_;
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}
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memset(count_sign_block, 0, sizeof(count_sign_block));
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for (int i = 0; i < count_test_block; ++i) {
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// Initialize a test block with input range [-15, 15].
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for (int j = 0; j < 16; ++j)
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test_input_block[j] = (rnd.Rand8() >> 4) - (rnd.Rand8() >> 4);
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RunFwdTxfm(test_input_block, test_output_block, NULL, pitch, tx_type_);
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for (int j = 0; j < 16; ++j) {
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if (test_output_block[j] < 0)
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++count_sign_block[j][0];
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else if (test_output_block[j] > 0)
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++count_sign_block[j][1];
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}
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}
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for (int j = 0; j < 16; ++j) {
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const bool bias_acceptable = (abs(count_sign_block[j][0] -
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count_sign_block[j][1]) < 100000);
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EXPECT_TRUE(bias_acceptable)
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<< "Error: 4x4 FDCT/FHT has a sign bias > 10%"
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<< " for input range [-15, 15] at index " << j;
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}
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}
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TEST_P(FwdTrans4x4Test, RoundTripErrorCheck) {
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ACMRandom rnd(ACMRandom::DeterministicSeed());
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int max_error = 0;
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double total_error = 0;
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const int count_test_block = 1000000;
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for (int i = 0; i < count_test_block; ++i) {
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int16_t test_input_block[16];
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int16_t test_temp_block[16];
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uint8_t dst[16], src[16];
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for (int j = 0; j < 16; ++j) {
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src[j] = rnd.Rand8();
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dst[j] = rnd.Rand8();
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}
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// Initialize a test block with input range [-255, 255].
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for (int j = 0; j < 16; ++j)
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test_input_block[j] = src[j] - dst[j];
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const int pitch = 8;
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RunFwdTxfm(test_input_block, test_temp_block, dst, pitch, tx_type_);
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for (int j = 0; j < 16; ++j) {
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if(test_temp_block[j] > 0) {
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test_temp_block[j] += 2;
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test_temp_block[j] /= 4;
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test_temp_block[j] *= 4;
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} else {
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test_temp_block[j] -= 2;
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test_temp_block[j] /= 4;
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test_temp_block[j] *= 4;
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}
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}
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// inverse transform and reconstruct the pixel block
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RunInvTxfm(test_input_block, test_temp_block, dst, pitch, tx_type_);
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for (int j = 0; j < 16; ++j) {
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const int diff = dst[j] - src[j];
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const int error = diff * diff;
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if (max_error < error)
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max_error = error;
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total_error += error;
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}
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}
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EXPECT_GE(1, max_error)
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<< "Error: FDCT/IDCT or FHT/IHT has an individual roundtrip error > 1";
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EXPECT_GE(count_test_block, total_error)
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<< "Error: FDCT/IDCT or FHT/IHT has average "
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<< "roundtrip error > 1 per block";
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}
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INSTANTIATE_TEST_CASE_P(VP9, FwdTrans4x4Test, ::testing::Range(0, 4));
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} // namespace
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