git-svn-id: http://webrtc.googlecode.com/svn/trunk@4 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/modules/utility/source/frame_scaler.h b/modules/utility/source/frame_scaler.h
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+/*
+ * Copyright (c) 2011 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.
+ */
+
+// This file implements a class that can be used for scaling frames.
+#ifndef WEBRTC_MODULES_UTILITY_SOURCE_FRAME_SCALER_H_
+#define WEBRTC_MODULES_UTILITY_SOURCE_FRAME_SCALER_H_
+
+#ifdef WEBRTC_MODULE_UTILITY_VIDEO
+
+#include "engine_configurations.h"
+#include "module_common_types.h"
+#include "typedefs.h"
+
+namespace webrtc
+{
+// TODO (perkj): add interpolator. Current implementation only support scaling
+// (up or down) where the width and height are scaled by a constant factor 2-4.
+// Also remove NO_INTERPOLATOR.
+
+// Disable usage of the old intertpolator implementation.
+#define NO_INTERPOLATOR 1
+
+
+class VideoFrame;
+class FrameScaler
+{
+public:
+ FrameScaler();
+ ~FrameScaler();
+
+ // Re-size videoFrame so that it has the width outWidth and height
+ // outHeight.
+ WebRtc_Word32 ResizeFrameIfNeeded(VideoFrame& videoFrame,
+ WebRtc_UWord32 outWidth,
+ WebRtc_UWord32 outHeight);
+private:
+ typedef WebRtc_Word8* VideoInterpolator;
+ VideoInterpolator*_ptrVideoInterpolator;
+
+ VideoFrame _interpolatorBuffer;
+ WebRtc_UWord32 _outWidth;
+ WebRtc_UWord32 _outHeight;
+ WebRtc_UWord32 _inWidth;
+ WebRtc_UWord32 _inHeight;
+
+};
+#endif // WEBRTC_MODULE_UTILITY_VIDEO
+} // namespace webrtc
+#endif // WEBRTC_MODULES_UTILITY_SOURCE_FRAME_SCALER_H_