119 lines
4.1 KiB
C++
119 lines
4.1 KiB
C++
/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef API_VIDEO_I420_BUFFER_H_
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#define API_VIDEO_I420_BUFFER_H_
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#include <stdint.h>
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#include <memory>
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#include "api/scoped_refptr.h"
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#include "api/video/video_frame_buffer.h"
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#include "api/video/video_rotation.h"
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#include "rtc_base/memory/aligned_malloc.h"
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#include "rtc_base/system/rtc_export.h"
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namespace webrtc {
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// Plain I420 buffer in standard memory.
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class RTC_EXPORT I420Buffer : public I420BufferInterface {
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public:
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static rtc::scoped_refptr<I420Buffer> Create(int width, int height);
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static rtc::scoped_refptr<I420Buffer> Create(int width,
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int height,
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int stride_y,
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int stride_u,
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int stride_v);
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// Create a new buffer and copy the pixel data.
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static rtc::scoped_refptr<I420Buffer> Copy(const I420BufferInterface& buffer);
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// Deprecated.
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static rtc::scoped_refptr<I420Buffer> Copy(const VideoFrameBuffer& buffer) {
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return Copy(*buffer.GetI420());
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}
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static rtc::scoped_refptr<I420Buffer> Copy(int width,
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int height,
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const uint8_t* data_y,
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int stride_y,
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const uint8_t* data_u,
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int stride_u,
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const uint8_t* data_v,
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int stride_v);
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// Returns a rotated copy of `src`.
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static rtc::scoped_refptr<I420Buffer> Rotate(const I420BufferInterface& src,
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VideoRotation rotation);
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// Deprecated.
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static rtc::scoped_refptr<I420Buffer> Rotate(const VideoFrameBuffer& src,
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VideoRotation rotation) {
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return Rotate(*src.GetI420(), rotation);
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}
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// Sets the buffer to all black.
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static void SetBlack(I420Buffer* buffer);
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// Sets all three planes to all zeros. Used to work around for
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// quirks in memory checkers
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// (https://bugs.chromium.org/p/libyuv/issues/detail?id=377) and
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// ffmpeg (http://crbug.com/390941).
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// TODO(nisse): Deprecated. Should be deleted if/when those issues
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// are resolved in a better way. Or in the mean time, use SetBlack.
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void InitializeData();
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int width() const override;
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int height() const override;
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const uint8_t* DataY() const override;
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const uint8_t* DataU() const override;
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const uint8_t* DataV() const override;
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int StrideY() const override;
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int StrideU() const override;
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int StrideV() const override;
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uint8_t* MutableDataY();
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uint8_t* MutableDataU();
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uint8_t* MutableDataV();
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// Scale the cropped area of `src` to the size of `this` buffer, and
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// write the result into `this`.
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void CropAndScaleFrom(const I420BufferInterface& src,
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int offset_x,
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int offset_y,
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int crop_width,
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int crop_height);
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// The common case of a center crop, when needed to adjust the
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// aspect ratio without distorting the image.
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void CropAndScaleFrom(const I420BufferInterface& src);
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// Scale all of `src` to the size of `this` buffer, with no cropping.
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void ScaleFrom(const I420BufferInterface& src);
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protected:
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I420Buffer(int width, int height);
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I420Buffer(int width, int height, int stride_y, int stride_u, int stride_v);
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~I420Buffer() override;
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private:
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const int width_;
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const int height_;
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const int stride_y_;
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const int stride_u_;
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const int stride_v_;
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const std::unique_ptr<uint8_t, AlignedFreeDeleter> data_;
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};
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} // namespace webrtc
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#endif // API_VIDEO_I420_BUFFER_H_
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