/*
* 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 "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 :
void SetUp() override {
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
Messung V0.5 in Prozent C=91 H=88 G=89
¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-06-07)
¤
*© Formatika GbR, Deutschland