test/frame_generator_capturer.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 "test/frame_generator_capturer.h"

 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <utility>
 #include <vector>

 #include "absl/memory/memory.h"
 #include "rtc_base/checks.h"
 #include "rtc_base/criticalsection.h"
 #include "rtc_base/logging.h"
 #include "rtc_base/task_queue.h"
 #include "rtc_base/timeutils.h"
 #include "system_wrappers/include/clock.h"

 namespace webrtc {
 namespace test {

 class FrameGeneratorCapturer::InsertFrameTask : public rtc::QueuedTask {
  public:
   explicit InsertFrameTask(FrameGeneratorCapturer* frame_generator_capturer)
       : frame_generator_capturer_(frame_generator_capturer),
         repeat_interval_ms_(-1),
         next_run_time_ms_(-1) {}

  private:
   bool Run() override {
     // Check if the frame interval for this
     // task queue is the same same as the current configured frame rate.
     int interval_ms =
         1000 / frame_generator_capturer_->GetCurrentConfiguredFramerate();
     if (repeat_interval_ms_ != interval_ms) {
       // Restart the timer if frame rate has changed since task was started.
       next_run_time_ms_ = rtc::TimeMillis();
       repeat_interval_ms_ = interval_ms;
     }
     // Schedule the next frame capture event to happen at approximately the
     // correct absolute time point.
     next_run_time_ms_ += interval_ms;

     frame_generator_capturer_->InsertFrame();

     int64_t now_ms = rtc::TimeMillis();
     if (next_run_time_ms_ < now_ms) {
       RTC_LOG(LS_ERROR) << "Frame Generator Capturer can't keep up with "
                            "requested fps.";
       rtc::TaskQueue::Current()->PostTask(absl::WrapUnique(this));
     } else {
       int64_t delay_ms = next_run_time_ms_ - now_ms;
       RTC_DCHECK_GE(delay_ms, 0);
       RTC_DCHECK_LE(delay_ms, interval_ms);
       rtc::TaskQueue::Current()->PostDelayedTask(absl::WrapUnique(this),
                                                  delay_ms);
     }
     return false;
   }

   webrtc::test::FrameGeneratorCapturer* const frame_generator_capturer_;
   int repeat_interval_ms_;
   int64_t next_run_time_ms_;
 };

 FrameGeneratorCapturer* FrameGeneratorCapturer::Create(
     int width,
     int height,
     absl::optional<FrameGenerator::OutputType> type,
     absl::optional<int> num_squares,
     int target_fps,
     Clock* clock) {
   auto capturer = absl::make_unique<FrameGeneratorCapturer>(
       clock,
       FrameGenerator::CreateSquareGenerator(width, height, type, num_squares),
       target_fps);
   if (!capturer->Init())
     return nullptr;

   return capturer.release();
 }

 FrameGeneratorCapturer* FrameGeneratorCapturer::CreateFromYuvFile(
     const std::string& file_name,
     size_t width,
     size_t height,
     int target_fps,
     Clock* clock) {
   auto capturer = absl::make_unique<FrameGeneratorCapturer>(
       clock,
       FrameGenerator::CreateFromYuvFile(std::vector<std::string>(1, file_name),
                                         width, height, 1),
       target_fps);
   if (!capturer->Init())
     return nullptr;

   return capturer.release();
 }

 FrameGeneratorCapturer* FrameGeneratorCapturer::CreateSlideGenerator(
     int width,
     int height,
     int frame_repeat_count,
     int target_fps,
     Clock* clock) {
   auto capturer = absl::make_unique<FrameGeneratorCapturer>(
       clock,
       FrameGenerator::CreateSlideGenerator(width, height, frame_repeat_count),
       target_fps);
   if (!capturer->Init())
     return nullptr;

   return capturer.release();
 }

 FrameGeneratorCapturer::FrameGeneratorCapturer(
     Clock* clock,
     std::unique_ptr<FrameGenerator> frame_generator,
     int target_fps)
     : clock_(clock),
       sending_(false),
       sink_(nullptr),
       sink_wants_observer_(nullptr),
       frame_generator_(std::move(frame_generator)),
       source_fps_(target_fps),
       target_capture_fps_(target_fps),
       first_frame_capture_time_(-1),
       task_queue_("FrameGenCapQ", rtc::TaskQueue::Priority::HIGH) {
   RTC_DCHECK(frame_generator_);
   RTC_DCHECK_GT(target_fps, 0);
 }

 FrameGeneratorCapturer::~FrameGeneratorCapturer() {
   Stop();
 }

 void FrameGeneratorCapturer::SetFakeRotation(VideoRotation rotation) {
   rtc::CritScope cs(&lock_);
   fake_rotation_ = rotation;
 }

 bool FrameGeneratorCapturer::Init() {
   // This check is added because frame_generator_ might be file based and should
   // not crash because a file moved.
   if (frame_generator_.get() == nullptr)
     return false;

   int framerate_fps = GetCurrentConfiguredFramerate();
   task_queue_.PostDelayedTask(absl::make_unique<InsertFrameTask>(this),
                               1000 / framerate_fps);

   return true;
 }

 void FrameGeneratorCapturer::InsertFrame() {
   rtc::CritScope cs(&lock_);
   if (sending_) {
     VideoFrame* frame = frame_generator_->NextFrame();
     // TODO(srte): Use more advanced frame rate control to allow arbritrary
     // fractions.
     int decimation =
         std::round(static_cast<double>(source_fps_) / target_capture_fps_);
     for (int i = 1; i < decimation; ++i)
       frame = frame_generator_->NextFrame();
     frame->set_timestamp_us(clock_->TimeInMicroseconds());
     frame->set_ntp_time_ms(clock_->CurrentNtpInMilliseconds());
     frame->set_rotation(fake_rotation_);
     if (first_frame_capture_time_ == -1) {
       first_frame_capture_time_ = frame->ntp_time_ms();
     }

     if (sink_) {
       absl::optional<VideoFrame> out_frame = AdaptFrame(*frame);
       if (out_frame)
         sink_->OnFrame(*out_frame);
     }
   }
 }

 void FrameGeneratorCapturer::Start() {
   rtc::CritScope cs(&lock_);
   sending_ = true;
 }

 void FrameGeneratorCapturer::Stop() {
   rtc::CritScope cs(&lock_);
   sending_ = false;
 }

 void FrameGeneratorCapturer::ChangeResolution(size_t width, size_t height) {
   rtc::CritScope cs(&lock_);
   frame_generator_->ChangeResolution(width, height);
 }

 void FrameGeneratorCapturer::ChangeFramerate(int target_framerate) {
   rtc::CritScope cs(&lock_);
   RTC_CHECK(target_capture_fps_ > 0);
   if (target_framerate > source_fps_)
     RTC_LOG(LS_WARNING) << "Target framerate clamped from " << target_framerate
                         << " to " << source_fps_;
   if (source_fps_ % target_capture_fps_ != 0) {
     int decimation =
         std::round(static_cast<double>(source_fps_) / target_capture_fps_);
     int effective_rate = target_capture_fps_ / decimation;
     RTC_LOG(LS_WARNING) << "Target framerate, " << target_framerate
                         << ", is an uneven fraction of the source rate, "
                         << source_fps_
                         << ". The framerate will be :" << effective_rate;
   }
   target_capture_fps_ = std::min(source_fps_, target_framerate);
 }

 void FrameGeneratorCapturer::SetSinkWantsObserver(SinkWantsObserver* observer) {
   rtc::CritScope cs(&lock_);
   RTC_DCHECK(!sink_wants_observer_);
   sink_wants_observer_ = observer;
 }

 void FrameGeneratorCapturer::AddOrUpdateSink(
     rtc::VideoSinkInterface<VideoFrame>* sink,
     const rtc::VideoSinkWants& wants) {
   rtc::CritScope cs(&lock_);
   RTC_CHECK(!sink_ || sink_ == sink);
   sink_ = sink;
   if (sink_wants_observer_)
     sink_wants_observer_->OnSinkWantsChanged(sink, wants);

   // Handle framerate within this class, just pass on resolution for possible
   // adaptation.
   rtc::VideoSinkWants resolution_wants = wants;
   resolution_wants.max_framerate_fps = std::numeric_limits<int>::max();
   TestVideoCapturer::AddOrUpdateSink(sink, resolution_wants);

   // Ignore any requests for framerate higher than initially configured.
   if (wants.max_framerate_fps < target_capture_fps_) {
     wanted_fps_.emplace(wants.max_framerate_fps);
   } else {
     wanted_fps_.reset();
   }
 }

 void FrameGeneratorCapturer::RemoveSink(
     rtc::VideoSinkInterface<VideoFrame>* sink) {
   rtc::CritScope cs(&lock_);
   RTC_CHECK(sink_ == sink);
   sink_ = nullptr;
 }

 void FrameGeneratorCapturer::ForceFrame() {
   // One-time non-repeating task,
   task_queue_.PostTask([this] { InsertFrame(); });
 }

 int FrameGeneratorCapturer::GetCurrentConfiguredFramerate() {
   rtc::CritScope cs(&lock_);
   if (wanted_fps_ && *wanted_fps_ < target_capture_fps_)
     return *wanted_fps_;
   return target_capture_fps_;
 }

 }  // 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 "test/frame_generator_capturer.h"

	#include <algorithm>
	#include <cmath>
	#include <limits>
	#include <utility>
	#include <vector>

	#include "absl/memory/memory.h"
	#include "rtc_base/checks.h"
	#include "rtc_base/criticalsection.h"
	#include "rtc_base/logging.h"
	#include "rtc_base/task_queue.h"
	#include "rtc_base/timeutils.h"
	#include "system_wrappers/include/clock.h"

	namespace webrtc {
	namespace test {

	class FrameGeneratorCapturer::InsertFrameTask : public rtc::QueuedTask {
	public:
	explicit InsertFrameTask(FrameGeneratorCapturer* frame_generator_capturer)
	: frame_generator_capturer_(frame_generator_capturer),
	repeat_interval_ms_(-1),
	next_run_time_ms_(-1) {}

	private:
	bool Run() override {
	// Check if the frame interval for this
	// task queue is the same same as the current configured frame rate.
	int interval_ms =
	1000 / frame_generator_capturer_->GetCurrentConfiguredFramerate();
	if (repeat_interval_ms_ != interval_ms) {
	// Restart the timer if frame rate has changed since task was started.
	next_run_time_ms_ = rtc::TimeMillis();
	repeat_interval_ms_ = interval_ms;
	}
	// Schedule the next frame capture event to happen at approximately the
	// correct absolute time point.
	next_run_time_ms_ += interval_ms;

	frame_generator_capturer_->InsertFrame();

	int64_t now_ms = rtc::TimeMillis();
	if (next_run_time_ms_ < now_ms) {
	RTC_LOG(LS_ERROR) << "Frame Generator Capturer can't keep up with "
	"requested fps.";
	rtc::TaskQueue::Current()->PostTask(absl::WrapUnique(this));
	} else {
	int64_t delay_ms = next_run_time_ms_ - now_ms;
	RTC_DCHECK_GE(delay_ms, 0);
	RTC_DCHECK_LE(delay_ms, interval_ms);
	rtc::TaskQueue::Current()->PostDelayedTask(absl::WrapUnique(this),
	delay_ms);
	}
	return false;
	}

	webrtc::test::FrameGeneratorCapturer* const frame_generator_capturer_;
	int repeat_interval_ms_;
	int64_t next_run_time_ms_;
	};

	FrameGeneratorCapturer* FrameGeneratorCapturer::Create(
	int width,
	int height,
	absl::optional<FrameGenerator::OutputType> type,
	absl::optional<int> num_squares,
	int target_fps,
	Clock* clock) {
	auto capturer = absl::make_unique<FrameGeneratorCapturer>(
	clock,
	FrameGenerator::CreateSquareGenerator(width, height, type, num_squares),
	target_fps);
	if (!capturer->Init())
	return nullptr;

	return capturer.release();
	}

	FrameGeneratorCapturer* FrameGeneratorCapturer::CreateFromYuvFile(
	const std::string& file_name,
	size_t width,
	size_t height,
	int target_fps,
	Clock* clock) {
	auto capturer = absl::make_unique<FrameGeneratorCapturer>(
	clock,
	FrameGenerator::CreateFromYuvFile(std::vector<std::string>(1, file_name),
	width, height, 1),
	target_fps);
	if (!capturer->Init())
	return nullptr;

	return capturer.release();
	}

	FrameGeneratorCapturer* FrameGeneratorCapturer::CreateSlideGenerator(
	int width,
	int height,
	int frame_repeat_count,
	int target_fps,
	Clock* clock) {
	auto capturer = absl::make_unique<FrameGeneratorCapturer>(
	clock,
	FrameGenerator::CreateSlideGenerator(width, height, frame_repeat_count),
	target_fps);
	if (!capturer->Init())
	return nullptr;

	return capturer.release();
	}

	FrameGeneratorCapturer::FrameGeneratorCapturer(
	Clock* clock,
	std::unique_ptr<FrameGenerator> frame_generator,
	int target_fps)
	: clock_(clock),
	sending_(false),
	sink_(nullptr),
	sink_wants_observer_(nullptr),
	frame_generator_(std::move(frame_generator)),
	source_fps_(target_fps),
	target_capture_fps_(target_fps),
	first_frame_capture_time_(-1),
	task_queue_("FrameGenCapQ", rtc::TaskQueue::Priority::HIGH) {
	RTC_DCHECK(frame_generator_);
	RTC_DCHECK_GT(target_fps, 0);
	}

	FrameGeneratorCapturer::~FrameGeneratorCapturer() {
	Stop();
	}

	void FrameGeneratorCapturer::SetFakeRotation(VideoRotation rotation) {
	rtc::CritScope cs(&lock_);
	fake_rotation_ = rotation;
	}

	bool FrameGeneratorCapturer::Init() {
	// This check is added because frame_generator_ might be file based and should
	// not crash because a file moved.
	if (frame_generator_.get() == nullptr)
	return false;

	int framerate_fps = GetCurrentConfiguredFramerate();
	task_queue_.PostDelayedTask(absl::make_unique<InsertFrameTask>(this),
	1000 / framerate_fps);

	return true;
	}

	void FrameGeneratorCapturer::InsertFrame() {
	rtc::CritScope cs(&lock_);
	if (sending_) {
	VideoFrame* frame = frame_generator_->NextFrame();
	// TODO(srte): Use more advanced frame rate control to allow arbritrary
	// fractions.
	int decimation =
	std::round(static_cast<double>(source_fps_) / target_capture_fps_);
	for (int i = 1; i < decimation; ++i)
	frame = frame_generator_->NextFrame();
	frame->set_timestamp_us(clock_->TimeInMicroseconds());
	frame->set_ntp_time_ms(clock_->CurrentNtpInMilliseconds());
	frame->set_rotation(fake_rotation_);
	if (first_frame_capture_time_ == -1) {
	first_frame_capture_time_ = frame->ntp_time_ms();
	}

	if (sink_) {
	absl::optional<VideoFrame> out_frame = AdaptFrame(*frame);
	if (out_frame)
	sink_->OnFrame(*out_frame);
	}
	}
	}

	void FrameGeneratorCapturer::Start() {
	rtc::CritScope cs(&lock_);
	sending_ = true;
	}

	void FrameGeneratorCapturer::Stop() {
	rtc::CritScope cs(&lock_);
	sending_ = false;
	}

	void FrameGeneratorCapturer::ChangeResolution(size_t width, size_t height) {
	rtc::CritScope cs(&lock_);
	frame_generator_->ChangeResolution(width, height);
	}

	void FrameGeneratorCapturer::ChangeFramerate(int target_framerate) {
	rtc::CritScope cs(&lock_);
	RTC_CHECK(target_capture_fps_ > 0);
	if (target_framerate > source_fps_)
	RTC_LOG(LS_WARNING) << "Target framerate clamped from " << target_framerate
	<< " to " << source_fps_;
	if (source_fps_ % target_capture_fps_ != 0) {
	int decimation =
	std::round(static_cast<double>(source_fps_) / target_capture_fps_);
	int effective_rate = target_capture_fps_ / decimation;
	RTC_LOG(LS_WARNING) << "Target framerate, " << target_framerate
	<< ", is an uneven fraction of the source rate, "
	<< source_fps_
	<< ". The framerate will be :" << effective_rate;
	}
	target_capture_fps_ = std::min(source_fps_, target_framerate);
	}

	void FrameGeneratorCapturer::SetSinkWantsObserver(SinkWantsObserver* observer) {
	rtc::CritScope cs(&lock_);
	RTC_DCHECK(!sink_wants_observer_);
	sink_wants_observer_ = observer;
	}

	void FrameGeneratorCapturer::AddOrUpdateSink(
	rtc::VideoSinkInterface<VideoFrame>* sink,
	const rtc::VideoSinkWants& wants) {
	rtc::CritScope cs(&lock_);
	RTC_CHECK(!sink_ \|\| sink_ == sink);
	sink_ = sink;
	if (sink_wants_observer_)
	sink_wants_observer_->OnSinkWantsChanged(sink, wants);

	// Handle framerate within this class, just pass on resolution for possible
	// adaptation.
	rtc::VideoSinkWants resolution_wants = wants;
	resolution_wants.max_framerate_fps = std::numeric_limits<int>::max();
	TestVideoCapturer::AddOrUpdateSink(sink, resolution_wants);

	// Ignore any requests for framerate higher than initially configured.
	if (wants.max_framerate_fps < target_capture_fps_) {
	wanted_fps_.emplace(wants.max_framerate_fps);
	} else {
	wanted_fps_.reset();
	}
	}

	void FrameGeneratorCapturer::RemoveSink(
	rtc::VideoSinkInterface<VideoFrame>* sink) {
	rtc::CritScope cs(&lock_);
	RTC_CHECK(sink_ == sink);
	sink_ = nullptr;
	}

	void FrameGeneratorCapturer::ForceFrame() {
	// One-time non-repeating task,
	task_queue_.PostTask([this] { InsertFrame(); });
	}

	int FrameGeneratorCapturer::GetCurrentConfiguredFramerate() {
	rtc::CritScope cs(&lock_);
	if (wanted_fps_ && *wanted_fps_ < target_capture_fps_)
	return *wanted_fps_;
	return target_capture_fps_;
	}

	} // namespace test
	} // namespace webrtc