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+/*
+ * Copyright (c) 2021 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_I444_BUFFER_H_
+#define API_VIDEO_I444_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 I444 buffer in standard memory.
+// I444 represents an image with in YUV format withouth any chroma subsampling.
+// https://en.wikipedia.org/wiki/Chroma_subsampling#4:4:4
+class RTC_EXPORT I444Buffer : public I444BufferInterface {
+ public:
+ static rtc::scoped_refptr<I444Buffer> Create(int width, int height);
+ static rtc::scoped_refptr<I444Buffer> 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<I444Buffer> Copy(const I444BufferInterface& buffer);
+
+ static rtc::scoped_refptr<I444Buffer> 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<I444Buffer> Rotate(const I444BufferInterface& src,
+ VideoRotation rotation);
+
+ rtc::scoped_refptr<I420BufferInterface> ToI420() final;
+ const I420BufferInterface* GetI420() const final { return nullptr; }
+
+ // 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 I444BufferInterface& src,
+ int offset_x,
+ int offset_y,
+ int crop_width,
+ int crop_height);
+
+ protected:
+ I444Buffer(int width, int height);
+ I444Buffer(int width, int height, int stride_y, int stride_u, int stride_v);
+
+ ~I444Buffer() 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_I444_BUFFER_H_