43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef MODULES_DESKTOP_CAPTURE_DIFFER_BLOCK_H_
|
|
#define MODULES_DESKTOP_CAPTURE_DIFFER_BLOCK_H_
|
|
|
|
#include <stdint.h>
|
|
|
|
namespace webrtc {
|
|
|
|
// Size (in pixels) of each square block used for diffing. This must be a
|
|
// multiple of sizeof(uint64)/8.
|
|
const int kBlockSize = 32;
|
|
|
|
// Format: BGRA 32 bit.
|
|
const int kBytesPerPixel = 4;
|
|
|
|
// Low level function to compare 2 vectors of pixels of size kBlockSize. Returns
|
|
// whether the blocks differ.
|
|
bool VectorDifference(const uint8_t* image1, const uint8_t* image2);
|
|
|
|
// Low level function to compare 2 blocks of pixels of size
|
|
// (kBlockSize, |height|). Returns whether the blocks differ.
|
|
bool BlockDifference(const uint8_t* image1,
|
|
const uint8_t* image2,
|
|
int height,
|
|
int stride);
|
|
|
|
// Low level function to compare 2 blocks of pixels of size
|
|
// (kBlockSize, kBlockSize). Returns whether the blocks differ.
|
|
bool BlockDifference(const uint8_t* image1, const uint8_t* image2, int stride);
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // MODULES_DESKTOP_CAPTURE_DIFFER_BLOCK_H_
|