Source code
Revision control
Copy as Markdown
Other Tools
/*
* Copyright (c) 2022 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/i210_buffer.h"
#include <cstdint>
#include <utility>
#include "api/make_ref_counted.h"
#include "api/scoped_refptr.h"
#include "api/video/i420_buffer.h"
#include "api/video/i422_buffer.h"
#include "api/video/video_frame_buffer.h"
#include "api/video/video_rotation.h"
#include "rtc_base/checks.h"
#include "rtc_base/memory/aligned_malloc.h"
#include "third_party/libyuv/include/libyuv/convert.h"
#include "third_party/libyuv/include/libyuv/planar_functions.h"
#include "third_party/libyuv/include/libyuv/rotate.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;
static const int kBytesPerPixel = 2;
namespace webrtc {
namespace {
int I210DataSize(int height, int stride_y, int stride_u, int stride_v) {
return kBytesPerPixel *
(stride_y * height + stride_u * height + stride_v * height);
}
} // namespace
I210Buffer::I210Buffer(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<uint16_t*>(
AlignedMalloc(I210DataSize(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);
}
I210Buffer::~I210Buffer() {}
// static
rtc::scoped_refptr<I210Buffer> I210Buffer::Create(int width, int height) {
return rtc::make_ref_counted<I210Buffer>(width, height, width,
(width + 1) / 2, (width + 1) / 2);
}
// static
rtc::scoped_refptr<I210Buffer> I210Buffer::Copy(
const I210BufferInterface& source) {
const int width = source.width();
const int height = source.height();
rtc::scoped_refptr<I210Buffer> buffer = Create(width, height);
RTC_CHECK_EQ(
0, libyuv::I210Copy(
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));
return buffer;
}
// static
rtc::scoped_refptr<I210Buffer> I210Buffer::Copy(
const I420BufferInterface& source) {
const int width = source.width();
const int height = source.height();
auto i422buffer = I422Buffer::Copy(source);
rtc::scoped_refptr<I210Buffer> buffer = Create(width, height);
RTC_CHECK_EQ(0, libyuv::I422ToI210(i422buffer->DataY(), i422buffer->StrideY(),
i422buffer->DataU(), i422buffer->StrideU(),
i422buffer->DataV(), i422buffer->StrideV(),
buffer->MutableDataY(), buffer->StrideY(),
buffer->MutableDataU(), buffer->StrideU(),
buffer->MutableDataV(), buffer->StrideV(),
width, height));
return buffer;
}
// static
rtc::scoped_refptr<I210Buffer> I210Buffer::Rotate(
const I210BufferInterface& 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::I210Buffer> buffer =
I210Buffer::Create(rotated_width, rotated_height);
RTC_CHECK_EQ(0,
libyuv::I210Rotate(
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)));
return buffer;
}
rtc::scoped_refptr<I420BufferInterface> I210Buffer::ToI420() {
rtc::scoped_refptr<I420Buffer> i420_buffer =
I420Buffer::Create(width(), height());
libyuv::I210ToI420(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());
return i420_buffer;
}
int I210Buffer::width() const {
return width_;
}
int I210Buffer::height() const {
return height_;
}
const uint16_t* I210Buffer::DataY() const {
return data_.get();
}
const uint16_t* I210Buffer::DataU() const {
return data_.get() + stride_y_ * height_;
}
const uint16_t* I210Buffer::DataV() const {
return data_.get() + stride_y_ * height_ + stride_u_ * height_;
}
int I210Buffer::StrideY() const {
return stride_y_;
}
int I210Buffer::StrideU() const {
return stride_u_;
}
int I210Buffer::StrideV() const {
return stride_v_;
}
uint16_t* I210Buffer::MutableDataY() {
return const_cast<uint16_t*>(DataY());
}
uint16_t* I210Buffer::MutableDataU() {
return const_cast<uint16_t*>(DataU());
}
uint16_t* I210Buffer::MutableDataV() {
return const_cast<uint16_t*>(DataV());
}
void I210Buffer::CropAndScaleFrom(const I210BufferInterface& 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);
RTC_CHECK_GE(crop_width, 0);
RTC_CHECK_GE(crop_height, 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 uint16_t* y_plane = src.DataY() + src.StrideY() * offset_y + offset_x;
const uint16_t* u_plane =
src.DataU() + src.StrideU() * uv_offset_y + uv_offset_x;
const uint16_t* v_plane =
src.DataV() + src.StrideV() * uv_offset_y + uv_offset_x;
int res = libyuv::I422Scale_16(
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);
}
void I210Buffer::ScaleFrom(const I210BufferInterface& src) {
CropAndScaleFrom(src, 0, 0, src.width(), src.height());
}
} // namespace webrtc