Repo created

TMessagesProj/jni/voip/webrtc/modules/desktop_capture/differ_block.h

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+/*
+ *  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_