43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
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/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_DESKTOP_CAPTURE_DIFFER_BLOCK_H_
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#define MODULES_DESKTOP_CAPTURE_DIFFER_BLOCK_H_
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#include <stdint.h>
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namespace webrtc {
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// Size (in pixels) of each square block used for diffing. This must be a
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// multiple of sizeof(uint64)/8.
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const int kBlockSize = 32;
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// Format: BGRA 32 bit.
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const int kBytesPerPixel = 4;
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// Low level function to compare 2 vectors of pixels of size kBlockSize. Returns
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// whether the blocks differ.
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bool VectorDifference(const uint8_t* image1, const uint8_t* image2);
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// Low level function to compare 2 blocks of pixels of size
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// (kBlockSize, |height|). Returns whether the blocks differ.
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bool BlockDifference(const uint8_t* image1,
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const uint8_t* image2,
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int height,
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int stride);
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// Low level function to compare 2 blocks of pixels of size
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// (kBlockSize, kBlockSize). Returns whether the blocks differ.
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bool BlockDifference(const uint8_t* image1, const uint8_t* image2, int stride);
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} // namespace webrtc
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#endif // MODULES_DESKTOP_CAPTURE_DIFFER_BLOCK_H_
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