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/*
* Copyright (c) 2012 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.
*/
/*
* Interface to the LibYuv scaling functionality
*/
#ifndef WEBRTC_COMMON_VIDEO_LIBYUV_INCLUDE_SCALER_H_
#define WEBRTC_COMMON_VIDEO_LIBYUV_INCLUDE_SCALER_H_
#include "webrtc/common_video/include/i420_buffer_pool.h"
#include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
#include "webrtc/typedefs.h"
#include "webrtc/video_frame.h"
namespace webrtc {
// Supported scaling types
enum ScaleMethod {
kScalePoint, // no interpolation
kScaleBilinear,
kScaleBox
};
class Scaler {
public:
Scaler();
~Scaler();
// Set interpolation properties:
//
// Return value: 0 - OK
// -1 - parameter error
int Set(int src_width, int src_height,
int dst_width, int dst_height,
VideoType src_video_type, VideoType dst_video_type,
ScaleMethod method);
// Scale frame
// Memory is allocated by this object and recycled using |buffer_pool_|.
// Return value: 0 - OK,
// -1 - parameter error
// -2 - scaler not set
int Scale(const VideoFrame& src_frame, VideoFrame* dst_frame);
private:
// Determine if the VideoTypes are currently supported.
bool SupportedVideoType(VideoType src_video_type,
VideoType dst_video_type);
ScaleMethod method_;
int src_width_;
int src_height_;
int dst_width_;
int dst_height_;
bool set_;
I420BufferPool buffer_pool_;
};
} // namespace webrtc
#endif // WEBRTC_COMMON_VIDEO_LIBYUV_INCLUDE_SCALER_H_
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