common_video/video_frame_buffer.cc - src/webrtc - Git at Google

 /*
  *  Copyright (c) 2015 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 "webrtc/common_video/include/video_frame_buffer.h"

 #include <string.h>

 #include <algorithm>

 #include "webrtc/base/checks.h"
 #include "webrtc/base/keep_ref_until_done.h"
 #include "libyuv/convert.h"
 #include "libyuv/planar_functions.h"
 #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 I420DataSize(int height, int stride_y, int stride_u, int stride_v) {
   return stride_y * height + (stride_u + stride_v) * ((height + 1) / 2);
 }

 }  // namespace

 VideoFrameBuffer::~VideoFrameBuffer() {}

 I420Buffer::I420Buffer(int width, int height)
     : I420Buffer(width, height, width, (width + 1) / 2, (width + 1) / 2) {
 }

 I420Buffer::I420Buffer(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(
           I420DataSize(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);
 }

 I420Buffer::~I420Buffer() {
 }

 // static
 rtc::scoped_refptr<I420Buffer> I420Buffer::Create(int width, int height) {
   return new rtc::RefCountedObject<I420Buffer>(width, height);
 }

 // static
 rtc::scoped_refptr<I420Buffer> I420Buffer::Create(int width,
                                                   int height,
                                                   int stride_y,
                                                   int stride_u,
                                                   int stride_v) {
   return new rtc::RefCountedObject<I420Buffer>(
       width, height, stride_y, stride_u, stride_v);
 }

 // static
 rtc::scoped_refptr<I420Buffer> I420Buffer::Copy(
     const VideoFrameBuffer& source) {
   return Copy(source.width(), source.height(),
               source.DataY(), source.StrideY(),
               source.DataU(), source.StrideU(),
               source.DataV(), source.StrideV());
 }

 // static
 rtc::scoped_refptr<I420Buffer> I420Buffer::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<I420Buffer> buffer = Create(width, height);
   RTC_CHECK_EQ(0, libyuv::I420Copy(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));
   return buffer;
 }

 // static
 rtc::scoped_refptr<VideoFrameBuffer> I420Buffer::Rotate(
     rtc::scoped_refptr<VideoFrameBuffer> src,
     VideoRotation rotation) {
   RTC_CHECK(src->DataY());
   RTC_CHECK(src->DataU());
   RTC_CHECK(src->DataV());

   if (rotation == webrtc::kVideoRotation_0) {
     return src;
   }

   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::I420Buffer> buffer =
       I420Buffer::Create(rotated_width, rotated_height);

   RTC_CHECK_EQ(0, libyuv::I420Rotate(
       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;
 }

 void I420Buffer::InitializeData() {
   memset(data_.get(), 0,
          I420DataSize(height_, stride_y_, stride_u_, stride_v_));
 }

 int I420Buffer::width() const {
   return width_;
 }

 int I420Buffer::height() const {
   return height_;
 }

 const uint8_t* I420Buffer::DataY() const {
   return data_.get();
 }
 const uint8_t* I420Buffer::DataU() const {
   return data_.get() + stride_y_ * height_;
 }
 const uint8_t* I420Buffer::DataV() const {
   return data_.get() + stride_y_ * height_ + stride_u_ * ((height_ + 1) / 2);
 }

 uint8_t* I420Buffer::MutableDataY() {
   return const_cast<uint8_t*>(DataY());
 }
 uint8_t* I420Buffer::MutableDataU() {
   return const_cast<uint8_t*>(DataU());
 }
 uint8_t* I420Buffer::MutableDataV() {
   return const_cast<uint8_t*>(DataV());
 }

 int I420Buffer::StrideY() const {
   return stride_y_;
 }
 int I420Buffer::StrideU() const {
   return stride_u_;
 }
 int I420Buffer::StrideV() const {
   return stride_v_;
 }

 void* I420Buffer::native_handle() const {
   return nullptr;
 }

 rtc::scoped_refptr<VideoFrameBuffer> I420Buffer::NativeToI420Buffer() {
   RTC_NOTREACHED();
   return nullptr;
 }

 void I420Buffer::SetToBlack() {
   RTC_CHECK(libyuv::I420Rect(MutableDataY(), StrideY(),
                              MutableDataU(), StrideU(),
                              MutableDataV(), StrideV(),
                              0, 0, width(), height(),
                              0, 128, 128) == 0);
 }

 void I420Buffer::CropAndScaleFrom(
     const VideoFrameBuffer& 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 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::I420Scale(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 I420Buffer::CropAndScaleFrom(
     const VideoFrameBuffer& src) {
   const int crop_width =
       std::min(src.width(), width() * src.height() / height());
   const int crop_height =
       std::min(src.height(), height() * src.width() / width());

   CropAndScaleFrom(
       src,
       (src.width() - crop_width) / 2, (src.height() - crop_height) / 2,
       crop_width, crop_height);
 }

 void I420Buffer::ScaleFrom(const VideoFrameBuffer& src) {
   CropAndScaleFrom(src, 0, 0, src.width(), src.height());
 }

 NativeHandleBuffer::NativeHandleBuffer(void* native_handle,
                                        int width,
                                        int height)
     : native_handle_(native_handle), width_(width), height_(height) {
   RTC_DCHECK(native_handle != nullptr);
   RTC_DCHECK_GT(width, 0);
   RTC_DCHECK_GT(height, 0);
 }

 int NativeHandleBuffer::width() const {
   return width_;
 }

 int NativeHandleBuffer::height() const {
   return height_;
 }

 const uint8_t* NativeHandleBuffer::DataY() const {
   RTC_NOTREACHED();  // Should not be called.
   return nullptr;
 }
 const uint8_t* NativeHandleBuffer::DataU() const {
   RTC_NOTREACHED();  // Should not be called.
   return nullptr;
 }
 const uint8_t* NativeHandleBuffer::DataV() const {
   RTC_NOTREACHED();  // Should not be called.
   return nullptr;
 }

 int NativeHandleBuffer::StrideY() const {
   RTC_NOTREACHED();  // Should not be called.
   return 0;
 }
 int NativeHandleBuffer::StrideU() const {
   RTC_NOTREACHED();  // Should not be called.
   return 0;
 }
 int NativeHandleBuffer::StrideV() const {
   RTC_NOTREACHED();  // Should not be called.
   return 0;
 }

 void* NativeHandleBuffer::native_handle() const {
   return native_handle_;
 }

 WrappedI420Buffer::WrappedI420Buffer(int width,
                                      int height,
                                      const uint8_t* y_plane,
                                      int y_stride,
                                      const uint8_t* u_plane,
                                      int u_stride,
                                      const uint8_t* v_plane,
                                      int v_stride,
                                      const rtc::Callback0<void>& no_longer_used)
     : width_(width),
       height_(height),
       y_plane_(y_plane),
       u_plane_(u_plane),
       v_plane_(v_plane),
       y_stride_(y_stride),
       u_stride_(u_stride),
       v_stride_(v_stride),
       no_longer_used_cb_(no_longer_used) {
 }

 WrappedI420Buffer::~WrappedI420Buffer() {
   no_longer_used_cb_();
 }

 int WrappedI420Buffer::width() const {
   return width_;
 }

 int WrappedI420Buffer::height() const {
   return height_;
 }

 const uint8_t* WrappedI420Buffer::DataY() const {
   return y_plane_;
 }
 const uint8_t* WrappedI420Buffer::DataU() const {
   return u_plane_;
 }
 const uint8_t* WrappedI420Buffer::DataV() const {
   return v_plane_;
 }

 int WrappedI420Buffer::StrideY() const {
   return y_stride_;
 }
 int WrappedI420Buffer::StrideU() const {
   return u_stride_;
 }
 int WrappedI420Buffer::StrideV() const {
   return v_stride_;
 }

 void* WrappedI420Buffer::native_handle() const {
   return nullptr;
 }

 rtc::scoped_refptr<VideoFrameBuffer> WrappedI420Buffer::NativeToI420Buffer() {
   RTC_NOTREACHED();
   return nullptr;
 }

 }  // namespace webrtc
	/*
	* Copyright (c) 2015 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 "webrtc/common_video/include/video_frame_buffer.h"

	#include <string.h>

	#include <algorithm>

	#include "webrtc/base/checks.h"
	#include "webrtc/base/keep_ref_until_done.h"
	#include "libyuv/convert.h"
	#include "libyuv/planar_functions.h"
	#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 I420DataSize(int height, int stride_y, int stride_u, int stride_v) {
	return stride_y * height + (stride_u + stride_v) * ((height + 1) / 2);
	}

	} // namespace

	VideoFrameBuffer::~VideoFrameBuffer() {}

	I420Buffer::I420Buffer(int width, int height)
	: I420Buffer(width, height, width, (width + 1) / 2, (width + 1) / 2) {
	}

	I420Buffer::I420Buffer(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(
	I420DataSize(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);
	}

	I420Buffer::~I420Buffer() {
	}

	// static
	rtc::scoped_refptr<I420Buffer> I420Buffer::Create(int width, int height) {
	return new rtc::RefCountedObject<I420Buffer>(width, height);
	}

	// static
	rtc::scoped_refptr<I420Buffer> I420Buffer::Create(int width,
	int height,
	int stride_y,
	int stride_u,
	int stride_v) {
	return new rtc::RefCountedObject<I420Buffer>(
	width, height, stride_y, stride_u, stride_v);
	}

	// static
	rtc::scoped_refptr<I420Buffer> I420Buffer::Copy(
	const VideoFrameBuffer& source) {
	return Copy(source.width(), source.height(),
	source.DataY(), source.StrideY(),
	source.DataU(), source.StrideU(),
	source.DataV(), source.StrideV());
	}

	// static
	rtc::scoped_refptr<I420Buffer> I420Buffer::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<I420Buffer> buffer = Create(width, height);
	RTC_CHECK_EQ(0, libyuv::I420Copy(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));
	return buffer;
	}

	// static
	rtc::scoped_refptr<VideoFrameBuffer> I420Buffer::Rotate(
	rtc::scoped_refptr<VideoFrameBuffer> src,
	VideoRotation rotation) {
	RTC_CHECK(src->DataY());
	RTC_CHECK(src->DataU());
	RTC_CHECK(src->DataV());

	if (rotation == webrtc::kVideoRotation_0) {
	return src;
	}

	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::I420Buffer> buffer =
	I420Buffer::Create(rotated_width, rotated_height);

	RTC_CHECK_EQ(0, libyuv::I420Rotate(
	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;
	}

	void I420Buffer::InitializeData() {
	memset(data_.get(), 0,
	I420DataSize(height_, stride_y_, stride_u_, stride_v_));
	}

	int I420Buffer::width() const {
	return width_;
	}

	int I420Buffer::height() const {
	return height_;
	}

	const uint8_t* I420Buffer::DataY() const {
	return data_.get();
	}
	const uint8_t* I420Buffer::DataU() const {
	return data_.get() + stride_y_ * height_;
	}
	const uint8_t* I420Buffer::DataV() const {
	return data_.get() + stride_y_ * height_ + stride_u_ * ((height_ + 1) / 2);
	}

	uint8_t* I420Buffer::MutableDataY() {
	return const_cast<uint8_t*>(DataY());
	}
	uint8_t* I420Buffer::MutableDataU() {
	return const_cast<uint8_t*>(DataU());
	}
	uint8_t* I420Buffer::MutableDataV() {
	return const_cast<uint8_t*>(DataV());
	}

	int I420Buffer::StrideY() const {
	return stride_y_;
	}
	int I420Buffer::StrideU() const {
	return stride_u_;
	}
	int I420Buffer::StrideV() const {
	return stride_v_;
	}

	void* I420Buffer::native_handle() const {
	return nullptr;
	}

	rtc::scoped_refptr<VideoFrameBuffer> I420Buffer::NativeToI420Buffer() {
	RTC_NOTREACHED();
	return nullptr;
	}

	void I420Buffer::SetToBlack() {
	RTC_CHECK(libyuv::I420Rect(MutableDataY(), StrideY(),
	MutableDataU(), StrideU(),
	MutableDataV(), StrideV(),
	0, 0, width(), height(),
	0, 128, 128) == 0);
	}

	void I420Buffer::CropAndScaleFrom(
	const VideoFrameBuffer& 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 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::I420Scale(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 I420Buffer::CropAndScaleFrom(
	const VideoFrameBuffer& src) {
	const int crop_width =
	std::min(src.width(), width() * src.height() / height());
	const int crop_height =
	std::min(src.height(), height() * src.width() / width());

	CropAndScaleFrom(
	src,
	(src.width() - crop_width) / 2, (src.height() - crop_height) / 2,
	crop_width, crop_height);
	}

	void I420Buffer::ScaleFrom(const VideoFrameBuffer& src) {
	CropAndScaleFrom(src, 0, 0, src.width(), src.height());
	}

	NativeHandleBuffer::NativeHandleBuffer(void* native_handle,
	int width,
	int height)
	: native_handle_(native_handle), width_(width), height_(height) {
	RTC_DCHECK(native_handle != nullptr);
	RTC_DCHECK_GT(width, 0);
	RTC_DCHECK_GT(height, 0);
	}

	int NativeHandleBuffer::width() const {
	return width_;
	}

	int NativeHandleBuffer::height() const {
	return height_;
	}

	const uint8_t* NativeHandleBuffer::DataY() const {
	RTC_NOTREACHED(); // Should not be called.
	return nullptr;
	}
	const uint8_t* NativeHandleBuffer::DataU() const {
	RTC_NOTREACHED(); // Should not be called.
	return nullptr;
	}
	const uint8_t* NativeHandleBuffer::DataV() const {
	RTC_NOTREACHED(); // Should not be called.
	return nullptr;
	}

	int NativeHandleBuffer::StrideY() const {
	RTC_NOTREACHED(); // Should not be called.
	return 0;
	}
	int NativeHandleBuffer::StrideU() const {
	RTC_NOTREACHED(); // Should not be called.
	return 0;
	}
	int NativeHandleBuffer::StrideV() const {
	RTC_NOTREACHED(); // Should not be called.
	return 0;
	}

	void* NativeHandleBuffer::native_handle() const {
	return native_handle_;
	}

	WrappedI420Buffer::WrappedI420Buffer(int width,
	int height,
	const uint8_t* y_plane,
	int y_stride,
	const uint8_t* u_plane,
	int u_stride,
	const uint8_t* v_plane,
	int v_stride,
	const rtc::Callback0<void>& no_longer_used)
	: width_(width),
	height_(height),
	y_plane_(y_plane),
	u_plane_(u_plane),
	v_plane_(v_plane),
	y_stride_(y_stride),
	u_stride_(u_stride),
	v_stride_(v_stride),
	no_longer_used_cb_(no_longer_used) {
	}

	WrappedI420Buffer::~WrappedI420Buffer() {
	no_longer_used_cb_();
	}

	int WrappedI420Buffer::width() const {
	return width_;
	}

	int WrappedI420Buffer::height() const {
	return height_;
	}

	const uint8_t* WrappedI420Buffer::DataY() const {
	return y_plane_;
	}
	const uint8_t* WrappedI420Buffer::DataU() const {
	return u_plane_;
	}
	const uint8_t* WrappedI420Buffer::DataV() const {
	return v_plane_;
	}

	int WrappedI420Buffer::StrideY() const {
	return y_stride_;
	}
	int WrappedI420Buffer::StrideU() const {
	return u_stride_;
	}
	int WrappedI420Buffer::StrideV() const {
	return v_stride_;
	}

	void* WrappedI420Buffer::native_handle() const {
	return nullptr;
	}

	rtc::scoped_refptr<VideoFrameBuffer> WrappedI420Buffer::NativeToI420Buffer() {
	RTC_NOTREACHED();
	return nullptr;
	}

	} // namespace webrtc