1 /* 2 * Copyright (c) 2012 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 /* 12 * Interface to the LibYuv scaling functionality 13 */ 14 15 #ifndef WEBRTC_COMMON_VIDEO_LIBYUV_INCLUDE_SCALER_H_ 16 #define WEBRTC_COMMON_VIDEO_LIBYUV_INCLUDE_SCALER_H_ 17 18 #include "webrtc/common_video/include/i420_buffer_pool.h" 19 #include "webrtc/common_video/libyuv/include/webrtc_libyuv.h" 20 #include "webrtc/typedefs.h" 21 #include "webrtc/video_frame.h" 22 23 namespace webrtc { 24 25 // Supported scaling types 26 enum ScaleMethod { 27 kScalePoint, // no interpolation 28 kScaleBilinear, 29 kScaleBox 30 }; 31 32 class Scaler { 33 public: 34 Scaler(); 35 ~Scaler(); 36 37 // Set interpolation properties: 38 // 39 // Return value: 0 - OK 40 // -1 - parameter error 41 int Set(int src_width, int src_height, 42 int dst_width, int dst_height, 43 VideoType src_video_type, VideoType dst_video_type, 44 ScaleMethod method); 45 46 // Scale frame 47 // Memory is allocated by this object and recycled using |buffer_pool_|. 48 // Return value: 0 - OK, 49 // -1 - parameter error 50 // -2 - scaler not set 51 int Scale(const VideoFrame& src_frame, VideoFrame* dst_frame); 52 53 private: 54 // Determine if the VideoTypes are currently supported. 55 bool SupportedVideoType(VideoType src_video_type, 56 VideoType dst_video_type); 57 58 ScaleMethod method_; 59 int src_width_; 60 int src_height_; 61 int dst_width_; 62 int dst_height_; 63 bool set_; 64 I420BufferPool buffer_pool_; 65 }; 66 67 } // namespace webrtc 68 69 #endif // WEBRTC_COMMON_VIDEO_LIBYUV_INCLUDE_SCALER_H_ 70
