| sergeyu@chromium.org | 3d34f66 | 2013-06-04 18:51:23 +0000 | [diff] [blame^] | 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 | #ifndef WEBRTC_MODULES_DESKTOP_CAPTURE_DIFFER_BLOCK_H_ |
| 12 | #define WEBRTC_MODULES_DESKTOP_CAPTURE_DIFFER_BLOCK_H_ |
| 13 | |
| 14 | #include "webrtc/typedefs.h" |
| 15 | |
| 16 | namespace webrtc { |
| 17 | |
| 18 | // Size (in pixels) of each square block used for diffing. This must be a |
| 19 | // multiple of sizeof(uint64)/8. |
| 20 | const int kBlockSize = 32; |
| 21 | |
| 22 | // Format: BGRA 32 bit. |
| 23 | const int kBytesPerPixel = 4; |
| 24 | |
| 25 | // Low level functions to compare 2 blocks of pixels. Zero means the blocks |
| 26 | // are identical. One - the blocks are different. |
| 27 | int BlockDifference(const uint8_t* image1, const uint8_t* image2, int stride); |
| 28 | |
| 29 | } // namespace webrtc |
| 30 | |
| 31 | #endif // WEBRTC_MODULES_DESKTOP_CAPTURE_DIFFER_BLOCK_H_ |