a9ebbcc338
Updates the common convoloution code to support blocks larger than 16x16, and rectangular blocks. This uncovered a bug in the SSSE3 filtering routines due to the order of application of saturation. This commit fixes that bug, adjusts the unit test to bias its random values towards the extremes, and adds a test to ensure that all filters conform to the expected pairwise addition structure. Change-Id: I81f69668b1de0de5a8ed43f0643845641525c8f0
61 lines
1.2 KiB
C++
61 lines
1.2 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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#ifndef LIBVPX_TEST_ACM_RANDOM_H_
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#define LIBVPX_TEST_ACM_RANDOM_H_
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#include <stdlib.h>
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#include "vpx/vpx_integer.h"
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namespace libvpx_test {
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class ACMRandom {
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public:
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ACMRandom() {
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Reset(DeterministicSeed());
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}
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explicit ACMRandom(int seed) {
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Reset(seed);
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}
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void Reset(int seed) {
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srand(seed);
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}
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uint8_t Rand8(void) {
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return (rand() >> 8) & 0xff;
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}
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uint8_t Rand8Extremes(void) {
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// Returns a random value near 0 or near 255, to better exercise
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// saturation behavior.
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const uint8_t r = Rand8();
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return r < 128 ? r << 4 : r >> 4;
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}
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int PseudoUniform(int range) {
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return (rand() >> 8) % range;
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}
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int operator()(int n) {
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return PseudoUniform(n);
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}
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static int DeterministicSeed(void) {
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return 0xbaba;
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}
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};
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} // namespace libvpx_test
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#endif // LIBVPX_TEST_ACM_RANDOM_H_
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