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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/memory/ref_counted.h"
#include "remoting/host/differ_block.h"
#include "testing/gmock/include/gmock/gmock.h"
namespace remoting {
// Run 900 times to mimic 1280x720.
// TODO(fbarchard): Remove benchmark once performance is non-issue.
static const int kTimesToRun = 900;
static void GenerateData(uint8* 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 block_buffer[kSizeOfBlock * 2 + 16];
void PrepareBuffers(uint8* &block1, uint8* &block2) {
block1 = reinterpret_cast<uint8*>
((reinterpret_cast<uintptr_t>(&block_buffer[0]) + 15) & ~15);
GenerateData(block1, kSizeOfBlock);
block2 = block1 + kSizeOfBlock;
memcpy(block2, block1, kSizeOfBlock);
}
TEST(BlockDifferenceTestSame, BlockDifference) {
uint8* block1;
uint8* 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* block1;
uint8* 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* block1;
uint8* 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* block1;
uint8* 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 remoting
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