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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.
*/
#include "api/video/i422_buffer.h"
#include <string.h>
#include <algorithm>
#include <utility>
#include "api/make_ref_counted.h"
#include "api/video/i420_buffer.h"
#include "rtc_base/checks.h"
#include "third_party/libyuv/include/libyuv/convert.h"
#include "third_party/libyuv/include/libyuv/planar_functions.h"
#include "third_party/libyuv/include/libyuv/scale.h"
// Aligning pointer to 64 bytes for improved performance, e.g. use SIMD.
static const int kBufferAlignment = 64;
namespace webrtc {
namespace {
int I422DataSize(int height, int stride_y, int stride_u, int stride_v) {
return stride_y * height + stride_u * height + stride_v * height;
}
} // namespace
I422Buffer::I422Buffer(int width, int height)
: I422Buffer(width, height, width, (width + 1) / 2, (width + 1) / 2) {}
I422Buffer::I422Buffer(int width,
int height,
int stride_y,
int stride_u,
int stride_v)
: width_(width),
height_(height),
stride_y_(stride_y),
stride_u_(stride_u),
stride_v_(stride_v),
data_(static_cast<uint8_t*>(
AlignedMalloc(I422DataSize(height, stride_y, stride_u, stride_v),
kBufferAlignment))) {
RTC_DCHECK_GT(width, 0);
RTC_DCHECK_GT(height, 0);
RTC_DCHECK_GE(stride_y, width);
RTC_DCHECK_GE(stride_u, (width + 1) / 2);
RTC_DCHECK_GE(stride_v, (width + 1) / 2);
}
I422Buffer::~I422Buffer() {}
// static
rtc::scoped_refptr<I422Buffer> I422Buffer::Create(int width, int height) {
return rtc::make_ref_counted<I422Buffer>(width, height);
}
// static
rtc::scoped_refptr<I422Buffer> I422Buffer::Create(int width,
int height,
int stride_y,
int stride_u,
int stride_v) {
return rtc::make_ref_counted<I422Buffer>(width, height, stride_y, stride_u,
stride_v);
}
// static
rtc::scoped_refptr<I422Buffer> I422Buffer::Copy(
const I422BufferInterface& source) {
return Copy(source.width(), source.height(), source.DataY(), source.StrideY(),
source.DataU(), source.StrideU(), source.DataV(),
source.StrideV());
}
// static
rtc::scoped_refptr<I422Buffer> I422Buffer::Copy(
const I420BufferInterface& source) {
const int width = source.width();
const int height = source.height();
rtc::scoped_refptr<I422Buffer> buffer = Create(width, height);
int res = libyuv::I420ToI422(
source.DataY(), source.StrideY(), source.DataU(), source.StrideU(),
source.DataV(), source.StrideV(), buffer->MutableDataY(),
buffer->StrideY(), buffer->MutableDataU(), buffer->StrideU(),
buffer->MutableDataV(), buffer->StrideV(), width, height);
RTC_DCHECK_EQ(res, 0);
return buffer;
}
// static
rtc::scoped_refptr<I422Buffer> I422Buffer::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) {
// Note: May use different strides than the input data.
rtc::scoped_refptr<I422Buffer> buffer = Create(width, height);
int res = libyuv::I422Copy(data_y, stride_y, data_u, stride_u, data_v,
stride_v, buffer->MutableDataY(),
buffer->StrideY(), buffer->MutableDataU(),
buffer->StrideU(), buffer->MutableDataV(),
buffer->StrideV(), width, height);
RTC_DCHECK_EQ(res, 0);
return buffer;
}
// static
rtc::scoped_refptr<I422Buffer> I422Buffer::Rotate(
const I422BufferInterface& src,
VideoRotation rotation) {
RTC_CHECK(src.DataY());
RTC_CHECK(src.DataU());
RTC_CHECK(src.DataV());
int rotated_width = src.width();
int rotated_height = src.height();
if (rotation == webrtc::kVideoRotation_90 ||
rotation == webrtc::kVideoRotation_270) {
std::swap(rotated_width, rotated_height);
}
rtc::scoped_refptr<webrtc::I422Buffer> buffer =
I422Buffer::Create(rotated_width, rotated_height);
int res = libyuv::I422Rotate(
src.DataY(), src.StrideY(), src.DataU(), src.StrideU(), src.DataV(),
src.StrideV(), buffer->MutableDataY(), buffer->StrideY(),
buffer->MutableDataU(), buffer->StrideU(), buffer->MutableDataV(),
buffer->StrideV(), src.width(), src.height(),
static_cast<libyuv::RotationMode>(rotation));
RTC_DCHECK_EQ(res, 0);
return buffer;
}
rtc::scoped_refptr<I420BufferInterface> I422Buffer::ToI420() {
rtc::scoped_refptr<I420Buffer> i420_buffer =
I420Buffer::Create(width(), height());
int res = libyuv::I422ToI420(
DataY(), StrideY(), DataU(), StrideU(), DataV(), StrideV(),
i420_buffer->MutableDataY(), i420_buffer->StrideY(),
i420_buffer->MutableDataU(), i420_buffer->StrideU(),
i420_buffer->MutableDataV(), i420_buffer->StrideV(), width(), height());
RTC_DCHECK_EQ(res, 0);
return i420_buffer;
}
void I422Buffer::InitializeData() {
memset(data_.get(), 0,
I422DataSize(height_, stride_y_, stride_u_, stride_v_));
}
int I422Buffer::width() const {
return width_;
}
int I422Buffer::height() const {
return height_;
}
const uint8_t* I422Buffer::DataY() const {
return data_.get();
}
const uint8_t* I422Buffer::DataU() const {
return data_.get() + stride_y_ * height_;
}
const uint8_t* I422Buffer::DataV() const {
return data_.get() + stride_y_ * height_ + stride_u_ * height_;
}
int I422Buffer::StrideY() const {
return stride_y_;
}
int I422Buffer::StrideU() const {
return stride_u_;
}
int I422Buffer::StrideV() const {
return stride_v_;
}
uint8_t* I422Buffer::MutableDataY() {
return const_cast<uint8_t*>(DataY());
}
uint8_t* I422Buffer::MutableDataU() {
return const_cast<uint8_t*>(DataU());
}
uint8_t* I422Buffer::MutableDataV() {
return const_cast<uint8_t*>(DataV());
}
void I422Buffer::CropAndScaleFrom(const I422BufferInterface& src,
int offset_x,
int offset_y,
int crop_width,
int crop_height) {
RTC_CHECK_LE(crop_width, src.width());
RTC_CHECK_LE(crop_height, src.height());
RTC_CHECK_LE(crop_width + offset_x, src.width());
RTC_CHECK_LE(crop_height + offset_y, src.height());
RTC_CHECK_GE(offset_x, 0);
RTC_CHECK_GE(offset_y, 0);
// Make sure offset is even so that u/v plane becomes aligned.
const int uv_offset_x = offset_x / 2;
const int uv_offset_y = offset_y;
offset_x = uv_offset_x * 2;
const uint8_t* y_plane = src.DataY() + src.StrideY() * offset_y + offset_x;
const uint8_t* u_plane =
src.DataU() + src.StrideU() * uv_offset_y + uv_offset_x;
const uint8_t* v_plane =
src.DataV() + src.StrideV() * uv_offset_y + uv_offset_x;
int res =
libyuv::I422Scale(y_plane, src.StrideY(), u_plane, src.StrideU(), v_plane,
src.StrideV(), crop_width, crop_height, MutableDataY(),
StrideY(), MutableDataU(), StrideU(), MutableDataV(),
StrideV(), width(), height(), libyuv::kFilterBox);
RTC_DCHECK_EQ(res, 0);
}
} // namespace webrtc
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