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* 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 {
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
// ( and
// ffmpeg (
// TODO(nisse): 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);
// Pastes whole picture to canvas at (offset_row, offset_col).
// Offsets and picture dimensions must be even.
void PasteFrom(const I420BufferInterface& picture,
int offset_col,
int offset_row);
I420Buffer(int width, int height);
I420Buffer(int width, int height, int stride_y, int stride_u, int stride_v);
~I420Buffer() override;
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_