webrtc/test/frame_generator.cc - src - Git at Google

 /*
  *  Copyright (c) 2013 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/test/frame_generator.h"

 #include <math.h>
 #include <stdio.h>
 #include <string.h>

 #include "webrtc/base/checks.h"
 #include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
 #include "webrtc/system_wrappers/interface/clock.h"

 namespace webrtc {
 namespace test {
 namespace {

 class ChromaGenerator : public FrameGenerator {
  public:
   ChromaGenerator(size_t width, size_t height)
       : angle_(0.0), width_(width), height_(height) {
     assert(width > 0);
     assert(height > 0);
   }

   VideoFrame* NextFrame() override {
     frame_.CreateEmptyFrame(static_cast<int>(width_),
                             static_cast<int>(height_),
                             static_cast<int>(width_),
                             static_cast<int>((width_ + 1) / 2),
                             static_cast<int>((width_ + 1) / 2));
     angle_ += 30.0;
     uint8_t u = fabs(sin(angle_)) * 0xFF;
     uint8_t v = fabs(cos(angle_)) * 0xFF;

     memset(frame_.buffer(kYPlane), 0x80, frame_.allocated_size(kYPlane));
     memset(frame_.buffer(kUPlane), u, frame_.allocated_size(kUPlane));
     memset(frame_.buffer(kVPlane), v, frame_.allocated_size(kVPlane));
     return &frame_;
   }

  private:
   double angle_;
   size_t width_;
   size_t height_;
   VideoFrame frame_;
 };

 class YuvFileGenerator : public FrameGenerator {
  public:
   YuvFileGenerator(std::vector<FILE*> files,
                    size_t width,
                    size_t height,
                    int frame_repeat_count)
       : file_index_(0),
         files_(files),
         width_(width),
         height_(height),
         frame_size_(CalcBufferSize(kI420,
                                    static_cast<int>(width_),
                                    static_cast<int>(height_))),
         frame_buffer_(new uint8_t[frame_size_]),
         frame_display_count_(frame_repeat_count),
         current_display_count_(0) {
     assert(width > 0);
     assert(height > 0);
     assert(frame_repeat_count > 0);
   }

   virtual ~YuvFileGenerator() {
     for (FILE* file : files_)
       fclose(file);
   }

   VideoFrame* NextFrame() override {
     if (current_display_count_ == 0)
       ReadNextFrame();
     if (++current_display_count_ >= frame_display_count_)
       current_display_count_ = 0;

     // If this is the last repeatition of this frame, it's OK to use the
     // original instance, otherwise use a copy.
     if (current_display_count_ == frame_display_count_)
       return &last_read_frame_;

     temp_frame_copy_.CopyFrame(last_read_frame_);
     return &temp_frame_copy_;
   }

   void ReadNextFrame() {
     size_t bytes_read =
         fread(frame_buffer_.get(), 1, frame_size_, files_[file_index_]);
     if (bytes_read < frame_size_) {
       // No more frames to read in this file, rewind and move to next file.
       rewind(files_[file_index_]);
       file_index_ = (file_index_ + 1) % files_.size();
       bytes_read = fread(frame_buffer_.get(), 1, frame_size_,
           files_[file_index_]);
       assert(bytes_read >= frame_size_);
     }

     last_read_frame_.CreateEmptyFrame(
         static_cast<int>(width_), static_cast<int>(height_),
         static_cast<int>(width_), static_cast<int>((width_ + 1) / 2),
         static_cast<int>((width_ + 1) / 2));

     ConvertToI420(kI420, frame_buffer_.get(), 0, 0, static_cast<int>(width_),
                   static_cast<int>(height_), 0, kVideoRotation_0,
                   &last_read_frame_);
   }

  private:
   size_t file_index_;
   const std::vector<FILE*> files_;
   const size_t width_;
   const size_t height_;
   const size_t frame_size_;
   const rtc::scoped_ptr<uint8_t[]> frame_buffer_;
   const int frame_display_count_;
   int current_display_count_;
   VideoFrame last_read_frame_;
   VideoFrame temp_frame_copy_;
 };

 class ScrollingImageFrameGenerator : public FrameGenerator {
  public:
   ScrollingImageFrameGenerator(Clock* clock,
                                const std::vector<FILE*>& files,
                                size_t source_width,
                                size_t source_height,
                                size_t target_width,
                                size_t target_height,
                                int64_t scroll_time_ms,
                                int64_t pause_time_ms)
       : clock_(clock),
         start_time_(clock->TimeInMilliseconds()),
         scroll_time_(scroll_time_ms),
         pause_time_(pause_time_ms),
         num_frames_(files.size()),
         current_frame_num_(num_frames_ - 1),
         current_source_frame_(nullptr),
         file_generator_(files, source_width, source_height, 1) {
     DCHECK(clock_ != nullptr);
     DCHECK_GT(num_frames_, 0u);
     DCHECK_GE(source_height, target_height);
     DCHECK_GE(source_width, target_width);
     DCHECK_GE(scroll_time_ms, 0);
     DCHECK_GE(pause_time_ms, 0);
     DCHECK_GT(scroll_time_ms + pause_time_ms, 0);
     current_frame_.CreateEmptyFrame(static_cast<int>(target_width),
                                     static_cast<int>(target_height),
                                     static_cast<int>(target_width),
                                     static_cast<int>((target_width + 1) / 2),
                                     static_cast<int>((target_width + 1) / 2));
   }

   virtual ~ScrollingImageFrameGenerator() {}

   VideoFrame* NextFrame() override {
     const int64_t kFrameDisplayTime = scroll_time_ + pause_time_;
     const int64_t now = clock_->TimeInMilliseconds();
     int64_t ms_since_start = now - start_time_;

     size_t frame_num = (ms_since_start / kFrameDisplayTime) % num_frames_;
     UpdateSourceFrame(frame_num);

     double scroll_factor;
     int64_t time_into_frame = ms_since_start % kFrameDisplayTime;
     if (time_into_frame < scroll_time_) {
       scroll_factor = static_cast<double>(time_into_frame) / scroll_time_;
     } else {
       scroll_factor = 1.0;
     }
     CropSourceToScrolledImage(scroll_factor);

     return &current_frame_;
   }

   void UpdateSourceFrame(size_t frame_num) {
     while (current_frame_num_ != frame_num) {
       current_source_frame_ = file_generator_.NextFrame();
       current_frame_num_ = (current_frame_num_ + 1) % num_frames_;
     }
     DCHECK(current_source_frame_ != nullptr);
   }

   void CropSourceToScrolledImage(double scroll_factor) {
     const int kTargetWidth = current_frame_.width();
     const int kTargetHeight = current_frame_.height();
     int scroll_margin_x = current_source_frame_->width() - kTargetWidth;
     int pixels_scrolled_x =
         static_cast<int>(scroll_margin_x * scroll_factor + 0.5);
     int scroll_margin_y = current_source_frame_->height() - kTargetHeight;
     int pixels_scrolled_y =
         static_cast<int>(scroll_margin_y * scroll_factor + 0.5);

     int offset_y = (current_source_frame_->stride(PlaneType::kYPlane) *
                     pixels_scrolled_y) +
                    pixels_scrolled_x;
     int offset_u = (current_source_frame_->stride(PlaneType::kUPlane) *
                     (pixels_scrolled_y / 2)) +
                    (pixels_scrolled_x / 2);
     int offset_v = (current_source_frame_->stride(PlaneType::kVPlane) *
                     (pixels_scrolled_y / 2)) +
                    (pixels_scrolled_x / 2);

     current_frame_.CreateFrame(
         &current_source_frame_->buffer(PlaneType::kYPlane)[offset_y],
         &current_source_frame_->buffer(PlaneType::kUPlane)[offset_u],
         &current_source_frame_->buffer(PlaneType::kVPlane)[offset_v],
         kTargetWidth, kTargetHeight,
         current_source_frame_->stride(PlaneType::kYPlane),
         current_source_frame_->stride(PlaneType::kUPlane),
         current_source_frame_->stride(PlaneType::kVPlane));
   }

   Clock* const clock_;
   const int64_t start_time_;
   const int64_t scroll_time_;
   const int64_t pause_time_;
   const size_t num_frames_;
   size_t current_frame_num_;
   VideoFrame* current_source_frame_;
   VideoFrame current_frame_;
   YuvFileGenerator file_generator_;
 };

 }  // namespace

 FrameGenerator* FrameGenerator::CreateChromaGenerator(size_t width,
                                                       size_t height) {
   return new ChromaGenerator(width, height);
 }

 FrameGenerator* FrameGenerator::CreateFromYuvFile(
     std::vector<std::string> filenames,
     size_t width,
     size_t height,
     int frame_repeat_count) {
   assert(!filenames.empty());
   std::vector<FILE*> files;
   for (const std::string& filename : filenames) {
     FILE* file = fopen(filename.c_str(), "rb");
     DCHECK(file != nullptr);
     files.push_back(file);
   }

   return new YuvFileGenerator(files, width, height, frame_repeat_count);
 }

 FrameGenerator* FrameGenerator::CreateScrollingInputFromYuvFiles(
     Clock* clock,
     std::vector<std::string> filenames,
     size_t source_width,
     size_t source_height,
     size_t target_width,
     size_t target_height,
     int64_t scroll_time_ms,
     int64_t pause_time_ms) {
   assert(!filenames.empty());
   std::vector<FILE*> files;
   for (const std::string& filename : filenames) {
     FILE* file = fopen(filename.c_str(), "rb");
     DCHECK(file != nullptr);
     files.push_back(file);
   }

   return new ScrollingImageFrameGenerator(
       clock, files, source_width, source_height, target_width, target_height,
       scroll_time_ms, pause_time_ms);
 }

 }  // namespace test
 }  // namespace webrtc
	/*
	* Copyright (c) 2013 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/test/frame_generator.h"

	#include <math.h>
	#include <stdio.h>
	#include <string.h>

	#include "webrtc/base/checks.h"
	#include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
	#include "webrtc/system_wrappers/interface/clock.h"

	namespace webrtc {
	namespace test {
	namespace {

	class ChromaGenerator : public FrameGenerator {
	public:
	ChromaGenerator(size_t width, size_t height)
	: angle_(0.0), width_(width), height_(height) {
	assert(width > 0);
	assert(height > 0);
	}

	VideoFrame* NextFrame() override {
	frame_.CreateEmptyFrame(static_cast<int>(width_),
	static_cast<int>(height_),
	static_cast<int>(width_),
	static_cast<int>((width_ + 1) / 2),
	static_cast<int>((width_ + 1) / 2));
	angle_ += 30.0;
	uint8_t u = fabs(sin(angle_)) * 0xFF;
	uint8_t v = fabs(cos(angle_)) * 0xFF;

	memset(frame_.buffer(kYPlane), 0x80, frame_.allocated_size(kYPlane));
	memset(frame_.buffer(kUPlane), u, frame_.allocated_size(kUPlane));
	memset(frame_.buffer(kVPlane), v, frame_.allocated_size(kVPlane));
	return &frame_;
	}

	private:
	double angle_;
	size_t width_;
	size_t height_;
	VideoFrame frame_;
	};

	class YuvFileGenerator : public FrameGenerator {
	public:
	YuvFileGenerator(std::vector<FILE*> files,
	size_t width,
	size_t height,
	int frame_repeat_count)
	: file_index_(0),
	files_(files),
	width_(width),
	height_(height),
	frame_size_(CalcBufferSize(kI420,
	static_cast<int>(width_),
	static_cast<int>(height_))),
	frame_buffer_(new uint8_t[frame_size_]),
	frame_display_count_(frame_repeat_count),
	current_display_count_(0) {
	assert(width > 0);
	assert(height > 0);
	assert(frame_repeat_count > 0);
	}

	virtual ~YuvFileGenerator() {
	for (FILE* file : files_)
	fclose(file);
	}

	VideoFrame* NextFrame() override {
	if (current_display_count_ == 0)
	ReadNextFrame();
	if (++current_display_count_ >= frame_display_count_)
	current_display_count_ = 0;

	// If this is the last repeatition of this frame, it's OK to use the
	// original instance, otherwise use a copy.
	if (current_display_count_ == frame_display_count_)
	return &last_read_frame_;

	temp_frame_copy_.CopyFrame(last_read_frame_);
	return &temp_frame_copy_;
	}

	void ReadNextFrame() {
	size_t bytes_read =
	fread(frame_buffer_.get(), 1, frame_size_, files_[file_index_]);
	if (bytes_read < frame_size_) {
	// No more frames to read in this file, rewind and move to next file.
	rewind(files_[file_index_]);
	file_index_ = (file_index_ + 1) % files_.size();
	bytes_read = fread(frame_buffer_.get(), 1, frame_size_,
	files_[file_index_]);
	assert(bytes_read >= frame_size_);
	}

	last_read_frame_.CreateEmptyFrame(
	static_cast<int>(width_), static_cast<int>(height_),
	static_cast<int>(width_), static_cast<int>((width_ + 1) / 2),
	static_cast<int>((width_ + 1) / 2));

	ConvertToI420(kI420, frame_buffer_.get(), 0, 0, static_cast<int>(width_),
	static_cast<int>(height_), 0, kVideoRotation_0,
	&last_read_frame_);
	}

	private:
	size_t file_index_;
	const std::vector<FILE*> files_;
	const size_t width_;
	const size_t height_;
	const size_t frame_size_;
	const rtc::scoped_ptr<uint8_t[]> frame_buffer_;
	const int frame_display_count_;
	int current_display_count_;
	VideoFrame last_read_frame_;
	VideoFrame temp_frame_copy_;
	};

	class ScrollingImageFrameGenerator : public FrameGenerator {
	public:
	ScrollingImageFrameGenerator(Clock* clock,
	const std::vector<FILE*>& files,
	size_t source_width,
	size_t source_height,
	size_t target_width,
	size_t target_height,
	int64_t scroll_time_ms,
	int64_t pause_time_ms)
	: clock_(clock),
	start_time_(clock->TimeInMilliseconds()),
	scroll_time_(scroll_time_ms),
	pause_time_(pause_time_ms),
	num_frames_(files.size()),
	current_frame_num_(num_frames_ - 1),
	current_source_frame_(nullptr),
	file_generator_(files, source_width, source_height, 1) {
	DCHECK(clock_ != nullptr);
	DCHECK_GT(num_frames_, 0u);
	DCHECK_GE(source_height, target_height);
	DCHECK_GE(source_width, target_width);
	DCHECK_GE(scroll_time_ms, 0);
	DCHECK_GE(pause_time_ms, 0);
	DCHECK_GT(scroll_time_ms + pause_time_ms, 0);
	current_frame_.CreateEmptyFrame(static_cast<int>(target_width),
	static_cast<int>(target_height),
	static_cast<int>(target_width),
	static_cast<int>((target_width + 1) / 2),
	static_cast<int>((target_width + 1) / 2));
	}

	virtual ~ScrollingImageFrameGenerator() {}

	VideoFrame* NextFrame() override {
	const int64_t kFrameDisplayTime = scroll_time_ + pause_time_;
	const int64_t now = clock_->TimeInMilliseconds();
	int64_t ms_since_start = now - start_time_;

	size_t frame_num = (ms_since_start / kFrameDisplayTime) % num_frames_;
	UpdateSourceFrame(frame_num);

	double scroll_factor;
	int64_t time_into_frame = ms_since_start % kFrameDisplayTime;
	if (time_into_frame < scroll_time_) {
	scroll_factor = static_cast<double>(time_into_frame) / scroll_time_;
	} else {
	scroll_factor = 1.0;
	}
	CropSourceToScrolledImage(scroll_factor);

	return &current_frame_;
	}

	void UpdateSourceFrame(size_t frame_num) {
	while (current_frame_num_ != frame_num) {
	current_source_frame_ = file_generator_.NextFrame();
	current_frame_num_ = (current_frame_num_ + 1) % num_frames_;
	}
	DCHECK(current_source_frame_ != nullptr);
	}

	void CropSourceToScrolledImage(double scroll_factor) {
	const int kTargetWidth = current_frame_.width();
	const int kTargetHeight = current_frame_.height();
	int scroll_margin_x = current_source_frame_->width() - kTargetWidth;
	int pixels_scrolled_x =
	static_cast<int>(scroll_margin_x * scroll_factor + 0.5);
	int scroll_margin_y = current_source_frame_->height() - kTargetHeight;
	int pixels_scrolled_y =
	static_cast<int>(scroll_margin_y * scroll_factor + 0.5);

	int offset_y = (current_source_frame_->stride(PlaneType::kYPlane) *
	pixels_scrolled_y) +
	pixels_scrolled_x;
	int offset_u = (current_source_frame_->stride(PlaneType::kUPlane) *
	(pixels_scrolled_y / 2)) +
	(pixels_scrolled_x / 2);
	int offset_v = (current_source_frame_->stride(PlaneType::kVPlane) *
	(pixels_scrolled_y / 2)) +
	(pixels_scrolled_x / 2);

	current_frame_.CreateFrame(
	&current_source_frame_->buffer(PlaneType::kYPlane)[offset_y],
	&current_source_frame_->buffer(PlaneType::kUPlane)[offset_u],
	&current_source_frame_->buffer(PlaneType::kVPlane)[offset_v],
	kTargetWidth, kTargetHeight,
	current_source_frame_->stride(PlaneType::kYPlane),
	current_source_frame_->stride(PlaneType::kUPlane),
	current_source_frame_->stride(PlaneType::kVPlane));
	}

	Clock* const clock_;
	const int64_t start_time_;
	const int64_t scroll_time_;
	const int64_t pause_time_;
	const size_t num_frames_;
	size_t current_frame_num_;
	VideoFrame* current_source_frame_;
	VideoFrame current_frame_;
	YuvFileGenerator file_generator_;
	};

	} // namespace

	FrameGenerator* FrameGenerator::CreateChromaGenerator(size_t width,
	size_t height) {
	return new ChromaGenerator(width, height);
	}

	FrameGenerator* FrameGenerator::CreateFromYuvFile(
	std::vector<std::string> filenames,
	size_t width,
	size_t height,
	int frame_repeat_count) {
	assert(!filenames.empty());
	std::vector<FILE*> files;
	for (const std::string& filename : filenames) {
	FILE* file = fopen(filename.c_str(), "rb");
	DCHECK(file != nullptr);
	files.push_back(file);
	}

	return new YuvFileGenerator(files, width, height, frame_repeat_count);
	}

	FrameGenerator* FrameGenerator::CreateScrollingInputFromYuvFiles(
	Clock* clock,
	std::vector<std::string> filenames,
	size_t source_width,
	size_t source_height,
	size_t target_width,
	size_t target_height,
	int64_t scroll_time_ms,
	int64_t pause_time_ms) {
	assert(!filenames.empty());
	std::vector<FILE*> files;
	for (const std::string& filename : filenames) {
	FILE* file = fopen(filename.c_str(), "rb");
	DCHECK(file != nullptr);
	files.push_back(file);
	}

	return new ScrollingImageFrameGenerator(
	clock, files, source_width, source_height, target_width, target_height,
	scroll_time_ms, pause_time_ms);
	}

	} // namespace test
	} // namespace webrtc