| /* |
| * Copyright (c) 2018 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/i010_buffer.h" |
| |
| #include <utility> |
| |
| #include "api/video/i420_buffer.h" |
| #include "rtc_base/checks.h" |
| #include "rtc_base/refcountedobject.h" |
| #include "third_party/libyuv/include/libyuv/convert.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 I010DataSize(int height, int stride_y, int stride_u, int stride_v) { |
| return kBytesPerPixel * |
| (stride_y * height + (stride_u + stride_v) * ((height + 1) / 2)); |
| } |
| |
| } // namespace |
| |
| I010Buffer::I010Buffer(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(I010DataSize(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); |
| } |
| |
| I010Buffer::~I010Buffer() {} |
| |
| // static |
| rtc::scoped_refptr<I010Buffer> I010Buffer::Create(int width, int height) { |
| return new rtc::RefCountedObject<I010Buffer>( |
| width, height, width, (width + 1) / 2, (width + 1) / 2); |
| } |
| |
| // static |
| rtc::scoped_refptr<I010Buffer> I010Buffer::Copy( |
| const I010BufferInterface& source) { |
| const int width = source.width(); |
| const int height = source.height(); |
| rtc::scoped_refptr<I010Buffer> buffer = Create(width, height); |
| RTC_CHECK_EQ( |
| 0, libyuv::I010Copy( |
| 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<I010Buffer> I010Buffer::Copy( |
| const I420BufferInterface& source) { |
| const int width = source.width(); |
| const int height = source.height(); |
| rtc::scoped_refptr<I010Buffer> buffer = Create(width, height); |
| RTC_CHECK_EQ( |
| 0, libyuv::I420ToI010( |
| 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<I010Buffer> I010Buffer::Rotate( |
| const I010BufferInterface& src, |
| VideoRotation rotation) { |
| if (rotation == webrtc::kVideoRotation_0) |
| return Copy(src); |
| |
| 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::I010Buffer> buffer = |
| Create(rotated_width, rotated_height); |
| // TODO(emircan): Remove this when there is libyuv::I010Rotate(). |
| for (int x = 0; x < src.width(); x++) { |
| for (int y = 0; y < src.height(); y++) { |
| int dest_x = x; |
| int dest_y = y; |
| switch (rotation) { |
| // This case is covered by the early return. |
| case webrtc::kVideoRotation_0: |
| RTC_NOTREACHED(); |
| break; |
| case webrtc::kVideoRotation_90: |
| dest_x = src.height() - y - 1; |
| dest_y = x; |
| break; |
| case webrtc::kVideoRotation_180: |
| dest_x = src.width() - x - 1; |
| dest_y = src.height() - y - 1; |
| break; |
| case webrtc::kVideoRotation_270: |
| dest_x = y; |
| dest_y = src.width() - x - 1; |
| break; |
| } |
| buffer->MutableDataY()[dest_x + buffer->StrideY() * dest_y] = |
| src.DataY()[x + src.StrideY() * y]; |
| dest_x /= 2; |
| dest_y /= 2; |
| int src_x = x / 2; |
| int src_y = y / 2; |
| buffer->MutableDataU()[dest_x + buffer->StrideU() * dest_y] = |
| src.DataU()[src_x + src.StrideU() * src_y]; |
| buffer->MutableDataV()[dest_x + buffer->StrideV() * dest_y] = |
| src.DataV()[src_x + src.StrideV() * src_y]; |
| } |
| } |
| return buffer; |
| } |
| |
| rtc::scoped_refptr<I420BufferInterface> I010Buffer::ToI420() { |
| rtc::scoped_refptr<I420Buffer> i420_buffer = |
| I420Buffer::Create(width(), height()); |
| libyuv::I010ToI420(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 I010Buffer::width() const { |
| return width_; |
| } |
| |
| int I010Buffer::height() const { |
| return height_; |
| } |
| |
| const uint16_t* I010Buffer::DataY() const { |
| return data_.get(); |
| } |
| const uint16_t* I010Buffer::DataU() const { |
| return data_.get() + stride_y_ * height_; |
| } |
| const uint16_t* I010Buffer::DataV() const { |
| return data_.get() + stride_y_ * height_ + stride_u_ * ((height_ + 1) / 2); |
| } |
| |
| int I010Buffer::StrideY() const { |
| return stride_y_; |
| } |
| int I010Buffer::StrideU() const { |
| return stride_u_; |
| } |
| int I010Buffer::StrideV() const { |
| return stride_v_; |
| } |
| |
| uint16_t* I010Buffer::MutableDataY() { |
| return const_cast<uint16_t*>(DataY()); |
| } |
| uint16_t* I010Buffer::MutableDataU() { |
| return const_cast<uint16_t*>(DataU()); |
| } |
| uint16_t* I010Buffer::MutableDataV() { |
| return const_cast<uint16_t*>(DataV()); |
| } |
| |
| void I010Buffer::CropAndScaleFrom(const I010BufferInterface& 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 / 2; |
| offset_x = uv_offset_x * 2; |
| offset_y = uv_offset_y * 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::I420Scale_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 I010Buffer::ScaleFrom(const I010BufferInterface& src) { |
| CropAndScaleFrom(src, 0, 0, src.width(), src.height()); |
| } |
| |
| } // namespace webrtc |