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/*
* Copyright (c) 2013 The WebRTC 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 "modules/desktop_capture/differ_block.h"
#include <string.h>
#include "test/gtest.h"
namespace webrtc {
// Run 900 times to mimic 1280x720.
// TODO(fbarchard): Remove benchmark once performance is non-issue.
static const int kTimesToRun = 900;
static void GenerateData(uint8_t* data, int size) {
for (int i = 0; i < size; ++i) {
data[i] = i;
}
}
// Memory buffer large enough for 2 blocks aligned to 16 bytes.
static const int kSizeOfBlock = kBlockSize * kBlockSize * kBytesPerPixel;
uint8_t block_buffer[kSizeOfBlock * 2 + 16];
void PrepareBuffers(uint8_t*& block1, uint8_t*& block2) {
block1 = reinterpret_cast<uint8_t*>(
(reinterpret_cast<uintptr_t>(&block_buffer[0]) + 15) & ~15);
GenerateData(block1, kSizeOfBlock);
block2 = block1 + kSizeOfBlock;
memcpy(block2, block1, kSizeOfBlock);
}
TEST(BlockDifferenceTestSame, BlockDifference) {
uint8_t* block1;
uint8_t* block2;
PrepareBuffers(block1, block2);
// These blocks should match.
for (int i = 0; i < kTimesToRun; ++i) {
int result = BlockDifference(block1, block2, kBlockSize * kBytesPerPixel);
EXPECT_EQ(0, result);
}
}
TEST(BlockDifferenceTestLast, BlockDifference) {
uint8_t* block1;
uint8_t* block2;
PrepareBuffers(block1, block2);
block2[kSizeOfBlock - 2] += 1;
for (int i = 0; i < kTimesToRun; ++i) {
int result = BlockDifference(block1, block2, kBlockSize * kBytesPerPixel);
EXPECT_EQ(1, result);
}
}
TEST(BlockDifferenceTestMid, BlockDifference) {
uint8_t* block1;
uint8_t* block2;
PrepareBuffers(block1, block2);
block2[kSizeOfBlock / 2 + 1] += 1;
for (int i = 0; i < kTimesToRun; ++i) {
int result = BlockDifference(block1, block2, kBlockSize * kBytesPerPixel);
EXPECT_EQ(1, result);
}
}
TEST(BlockDifferenceTestFirst, BlockDifference) {
uint8_t* block1;
uint8_t* block2;
PrepareBuffers(block1, block2);
block2[0] += 1;
for (int i = 0; i < kTimesToRun; ++i) {
int result = BlockDifference(block1, block2, kBlockSize * kBytesPerPixel);
EXPECT_EQ(1, result);
}
}
} // namespace webrtc
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