diff options
Diffstat (limited to 'third_party/libwebrtc/api/video/i010_buffer.cc')
| -rw-r--r-- | third_party/libwebrtc/api/video/i010_buffer.cc | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/video/i010_buffer.cc b/third_party/libwebrtc/api/video/i010_buffer.cc new file mode 100644 index 0000000000..d78e854eb9 --- /dev/null +++ b/third_party/libwebrtc/api/video/i010_buffer.cc @@ -0,0 +1,213 @@ +/* + * 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/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/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 rtc::make_ref_counted<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); + int res = 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); + RTC_DCHECK_EQ(res, 0); + + 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); + int res = 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); + RTC_DCHECK_EQ(res, 0); + + 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); + + int res = libyuv::I010Rotate( + 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> I010Buffer::ToI420() { + rtc::scoped_refptr<I420Buffer> i420_buffer = + I420Buffer::Create(width(), height()); + int res = 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()); + RTC_DCHECK_EQ(res, 0); + + 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 |