blob: 8f432f3a2870849662a884a421c20e2b9ae9543a [file] [log] [blame]
* 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.
* Interface to the LibYuv scaling functionality
#include "common_video/libyuv/include/libyuv.h"
#include "typedefs.h"
namespace webrtc {
// Supported scaling types
enum ScaleMethod {
kScalePoint, // no interpolation
// TODO (mikhal): Have set return the expected value of the dst_frame, such
// that the user can allocate memory for Scale().
class 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 user. If dst_frame is not of sufficient size,
// the frame will be reallocated to the appropriate size.
// Return value: 0 - OK,
// -1 - parameter error
// -2 - scaler not set
int Scale(const uint8_t* src_frame,
uint8_t*& dst_frame,
int& dst_size);
// 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_;
} // namespace webrtc