/*
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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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#include "webrtc/common_video/include/video_frame_buffer.h"
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#include "webrtc/base/checks.h"
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#include "webrtc/base/keep_ref_until_done.h"
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// Aligning pointer to 64 bytes for improved performance, e.g. use SIMD.
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static const int kBufferAlignment = 64;
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namespace webrtc {
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uint8_t* VideoFrameBuffer::MutableData(PlaneType type) {
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RTC_NOTREACHED();
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return nullptr;
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}
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VideoFrameBuffer::~VideoFrameBuffer() {}
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I420Buffer::I420Buffer(int width, int height)
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: I420Buffer(width, height, width, (width + 1) / 2, (width + 1) / 2) {
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}
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I420Buffer::I420Buffer(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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: width_(width),
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height_(height),
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stride_y_(stride_y),
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stride_u_(stride_u),
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stride_v_(stride_v),
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data_(static_cast<uint8_t*>(AlignedMalloc(
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stride_y * height + (stride_u + stride_v) * ((height + 1) / 2),
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kBufferAlignment))) {
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RTC_DCHECK_GT(width, 0);
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RTC_DCHECK_GT(height, 0);
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RTC_DCHECK_GE(stride_y, width);
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RTC_DCHECK_GE(stride_u, (width + 1) / 2);
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RTC_DCHECK_GE(stride_v, (width + 1) / 2);
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}
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I420Buffer::~I420Buffer() {
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}
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int I420Buffer::width() const {
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return width_;
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}
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int I420Buffer::height() const {
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return height_;
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}
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const uint8_t* I420Buffer::data(PlaneType type) const {
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switch (type) {
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case kYPlane:
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return data_.get();
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case kUPlane:
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return data_.get() + stride_y_ * height_;
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case kVPlane:
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return data_.get() + stride_y_ * height_ +
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stride_u_ * ((height_ + 1) / 2);
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default:
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RTC_NOTREACHED();
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return nullptr;
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}
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}
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uint8_t* I420Buffer::MutableData(PlaneType type) {
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RTC_DCHECK(HasOneRef());
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return const_cast<uint8_t*>(
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static_cast<const VideoFrameBuffer*>(this)->data(type));
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}
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int I420Buffer::stride(PlaneType type) const {
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switch (type) {
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case kYPlane:
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return stride_y_;
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case kUPlane:
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return stride_u_;
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case kVPlane:
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return stride_v_;
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default:
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RTC_NOTREACHED();
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return 0;
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}
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}
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void* I420Buffer::native_handle() const {
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return nullptr;
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}
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rtc::scoped_refptr<VideoFrameBuffer> I420Buffer::NativeToI420Buffer() {
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RTC_NOTREACHED();
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return nullptr;
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}
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NativeHandleBuffer::NativeHandleBuffer(void* native_handle,
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int width,
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int height)
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: native_handle_(native_handle), width_(width), height_(height) {
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RTC_DCHECK(native_handle != nullptr);
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RTC_DCHECK_GT(width, 0);
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RTC_DCHECK_GT(height, 0);
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}
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int NativeHandleBuffer::width() const {
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return width_;
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}
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int NativeHandleBuffer::height() const {
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return height_;
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}
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const uint8_t* NativeHandleBuffer::data(PlaneType type) const {
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RTC_NOTREACHED(); // Should not be called.
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return nullptr;
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}
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int NativeHandleBuffer::stride(PlaneType type) const {
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RTC_NOTREACHED(); // Should not be called.
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return 0;
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}
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void* NativeHandleBuffer::native_handle() const {
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return native_handle_;
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}
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WrappedI420Buffer::WrappedI420Buffer(int width,
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int height,
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const uint8_t* y_plane,
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int y_stride,
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const uint8_t* u_plane,
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int u_stride,
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const uint8_t* v_plane,
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int v_stride,
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const rtc::Callback0<void>& no_longer_used)
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: width_(width),
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height_(height),
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y_plane_(y_plane),
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u_plane_(u_plane),
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v_plane_(v_plane),
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y_stride_(y_stride),
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u_stride_(u_stride),
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v_stride_(v_stride),
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no_longer_used_cb_(no_longer_used) {
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}
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WrappedI420Buffer::~WrappedI420Buffer() {
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no_longer_used_cb_();
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}
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int WrappedI420Buffer::width() const {
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return width_;
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}
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int WrappedI420Buffer::height() const {
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return height_;
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}
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const uint8_t* WrappedI420Buffer::data(PlaneType type) const {
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switch (type) {
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case kYPlane:
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return y_plane_;
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case kUPlane:
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return u_plane_;
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case kVPlane:
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return v_plane_;
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default:
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RTC_NOTREACHED();
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return nullptr;
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}
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}
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int WrappedI420Buffer::stride(PlaneType type) const {
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switch (type) {
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case kYPlane:
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return y_stride_;
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case kUPlane:
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return u_stride_;
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case kVPlane:
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return v_stride_;
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default:
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RTC_NOTREACHED();
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return 0;
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}
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}
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void* WrappedI420Buffer::native_handle() const {
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return nullptr;
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}
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rtc::scoped_refptr<VideoFrameBuffer> WrappedI420Buffer::NativeToI420Buffer() {
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RTC_NOTREACHED();
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return nullptr;
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}
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rtc::scoped_refptr<VideoFrameBuffer> ShallowCenterCrop(
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const rtc::scoped_refptr<VideoFrameBuffer>& buffer,
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int cropped_width,
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int cropped_height) {
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RTC_CHECK(buffer->native_handle() == nullptr);
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RTC_CHECK_LE(cropped_width, buffer->width());
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RTC_CHECK_LE(cropped_height, buffer->height());
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if (buffer->width() == cropped_width && buffer->height() == cropped_height)
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return buffer;
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// Center crop to |cropped_width| x |cropped_height|.
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// Make sure offset is even so that u/v plane becomes aligned.
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const int uv_offset_x = (buffer->width() - cropped_width) / 4;
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const int uv_offset_y = (buffer->height() - cropped_height) / 4;
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const int offset_x = uv_offset_x * 2;
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const int offset_y = uv_offset_y * 2;
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const uint8_t* y_plane = buffer->data(kYPlane) +
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buffer->stride(kYPlane) * offset_y + offset_x;
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const uint8_t* u_plane = buffer->data(kUPlane) +
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buffer->stride(kUPlane) * uv_offset_y + uv_offset_x;
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const uint8_t* v_plane = buffer->data(kVPlane) +
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buffer->stride(kVPlane) * uv_offset_y + uv_offset_x;
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return new rtc::RefCountedObject<WrappedI420Buffer>(
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cropped_width, cropped_height,
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y_plane, buffer->stride(kYPlane),
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u_plane, buffer->stride(kUPlane),
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v_plane, buffer->stride(kVPlane),
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rtc::KeepRefUntilDone(buffer));
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}
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} // namespace webrtc
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