1 /* 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "testing/gmock/include/gmock/gmock.h" 12 #include "webrtc/modules/desktop_capture/differ_block.h" 13 #include "webrtc/system_wrappers/interface/ref_count.h" 14 15 namespace webrtc { 16 17 // Run 900 times to mimic 1280x720. 18 // TODO(fbarchard): Remove benchmark once performance is non-issue. 19 static const int kTimesToRun = 900; 20 21 static void GenerateData(uint8_t* data, int size) { 22 for (int i = 0; i < size; ++i) { 23 data[i] = i; 24 } 25 } 26 27 // Memory buffer large enough for 2 blocks aligned to 16 bytes. 28 static const int kSizeOfBlock = kBlockSize * kBlockSize * kBytesPerPixel; 29 uint8_t block_buffer[kSizeOfBlock * 2 + 16]; 30 31 void PrepareBuffers(uint8_t* &block1, uint8_t* &block2) { 32 block1 = reinterpret_cast<uint8_t*> 33 ((reinterpret_cast<uintptr_t>(&block_buffer[0]) + 15) & ~15); 34 GenerateData(block1, kSizeOfBlock); 35 block2 = block1 + kSizeOfBlock; 36 memcpy(block2, block1, kSizeOfBlock); 37 } 38 39 TEST(BlockDifferenceTestSame, BlockDifference) { 40 uint8_t* block1; 41 uint8_t* block2; 42 PrepareBuffers(block1, block2); 43 44 // These blocks should match. 45 for (int i = 0; i < kTimesToRun; ++i) { 46 int result = BlockDifference(block1, block2, kBlockSize * kBytesPerPixel); 47 EXPECT_EQ(0, result); 48 } 49 } 50 51 TEST(BlockDifferenceTestLast, BlockDifference) { 52 uint8_t* block1; 53 uint8_t* block2; 54 PrepareBuffers(block1, block2); 55 block2[kSizeOfBlock-2] += 1; 56 57 for (int i = 0; i < kTimesToRun; ++i) { 58 int result = BlockDifference(block1, block2, kBlockSize * kBytesPerPixel); 59 EXPECT_EQ(1, result); 60 } 61 } 62 63 TEST(BlockDifferenceTestMid, BlockDifference) { 64 uint8_t* block1; 65 uint8_t* block2; 66 PrepareBuffers(block1, block2); 67 block2[kSizeOfBlock/2+1] += 1; 68 69 for (int i = 0; i < kTimesToRun; ++i) { 70 int result = BlockDifference(block1, block2, kBlockSize * kBytesPerPixel); 71 EXPECT_EQ(1, result); 72 } 73 } 74 75 TEST(BlockDifferenceTestFirst, BlockDifference) { 76 uint8_t* block1; 77 uint8_t* block2; 78 PrepareBuffers(block1, block2); 79 block2[0] += 1; 80 81 for (int i = 0; i < kTimesToRun; ++i) { 82 int result = BlockDifference(block1, block2, kBlockSize * kBytesPerPixel); 83 EXPECT_EQ(1, result); 84 } 85 } 86 87 } // namespace webrtc 88
