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Diffstat (limited to 'third_party/libwebrtc/api/video/i420_buffer.h')
| -rw-r--r-- | third_party/libwebrtc/api/video/i420_buffer.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/video/i420_buffer.h b/third_party/libwebrtc/api/video/i420_buffer.h new file mode 100644 index 0000000000..b337489657 --- /dev/null +++ b/third_party/libwebrtc/api/video/i420_buffer.h @@ -0,0 +1,118 @@ +/* + * Copyright (c) 2015 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 API_VIDEO_I420_BUFFER_H_ +#define API_VIDEO_I420_BUFFER_H_ + +#include <stdint.h> + +#include <memory> + +#include "api/scoped_refptr.h" +#include "api/video/video_frame_buffer.h" +#include "api/video/video_rotation.h" +#include "rtc_base/memory/aligned_malloc.h" +#include "rtc_base/system/rtc_export.h" + +namespace webrtc { + +// Plain I420 buffer in standard memory. +class RTC_EXPORT I420Buffer : public I420BufferInterface { + public: + static rtc::scoped_refptr<I420Buffer> Create(int width, int height); + static rtc::scoped_refptr<I420Buffer> Create(int width, + int height, + int stride_y, + int stride_u, + int stride_v); + + // Create a new buffer and copy the pixel data. + static rtc::scoped_refptr<I420Buffer> Copy(const I420BufferInterface& buffer); + // Deprecated. + static rtc::scoped_refptr<I420Buffer> Copy(const VideoFrameBuffer& buffer) { + return Copy(*buffer.GetI420()); + } + + static rtc::scoped_refptr<I420Buffer> Copy(int width, + int height, + const uint8_t* data_y, + int stride_y, + const uint8_t* data_u, + int stride_u, + const uint8_t* data_v, + int stride_v); + + // Returns a rotated copy of `src`. + static rtc::scoped_refptr<I420Buffer> Rotate(const I420BufferInterface& src, + VideoRotation rotation); + // Deprecated. + static rtc::scoped_refptr<I420Buffer> Rotate(const VideoFrameBuffer& src, + VideoRotation rotation) { + return Rotate(*src.GetI420(), rotation); + } + + // Sets the buffer to all black. + static void SetBlack(I420Buffer* buffer); + + // Sets all three planes to all zeros. Used to work around for + // quirks in memory checkers + // (https://bugs.chromium.org/p/libyuv/issues/detail?id=377) and + // ffmpeg (http://crbug.com/390941). + // TODO(https://crbug.com/390941): Deprecated. Should be deleted if/when those + // issues are resolved in a better way. Or in the mean time, use SetBlack. + void InitializeData(); + + int width() const override; + int height() const override; + const uint8_t* DataY() const override; + const uint8_t* DataU() const override; + const uint8_t* DataV() const override; + + int StrideY() const override; + int StrideU() const override; + int StrideV() const override; + + uint8_t* MutableDataY(); + uint8_t* MutableDataU(); + uint8_t* MutableDataV(); + + // Scale the cropped area of `src` to the size of `this` buffer, and + // write the result into `this`. + void CropAndScaleFrom(const I420BufferInterface& src, + int offset_x, + int offset_y, + int crop_width, + int crop_height); + + // The common case of a center crop, when needed to adjust the + // aspect ratio without distorting the image. + void CropAndScaleFrom(const I420BufferInterface& src); + + // Scale all of `src` to the size of `this` buffer, with no cropping. + void ScaleFrom(const I420BufferInterface& src); + + protected: + I420Buffer(int width, int height); + I420Buffer(int width, int height, int stride_y, int stride_u, int stride_v); + + ~I420Buffer() override; + + private: + const int width_; + const int height_; + const int stride_y_; + const int stride_u_; + const int stride_v_; + const std::unique_ptr<uint8_t, AlignedFreeDeleter> data_; +}; + +} // namespace webrtc + +#endif // API_VIDEO_I420_BUFFER_H_ |