api/video/i010_buffer.cc - src - Git at Google

 /*
  *  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);
   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_DCHECK_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
	/*
	* 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);
	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_DCHECK_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