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/*
* 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_capturer.h"
#include <utility>
#include <vector>
#include "webrtc/rtc_base/criticalsection.h"
#include "webrtc/rtc_base/logging.h"
#include "webrtc/rtc_base/platform_thread.h"
#include "webrtc/rtc_base/task_queue.h"
#include "webrtc/rtc_base/timeutils.h"
#include "webrtc/system_wrappers/include/clock.h"
#include "webrtc/test/frame_generator.h"
#include "webrtc/video_send_stream.h"
namespace webrtc {
namespace test {
class FrameGeneratorCapturer::InsertFrameTask : public rtc::QueuedTask {
public:
// Repeats in |repeat_interval_ms|. One-time if |repeat_interval_ms| == 0.
InsertFrameTask(
webrtc::test::FrameGeneratorCapturer* frame_generator_capturer,
uint32_t repeat_interval_ms)
: frame_generator_capturer_(frame_generator_capturer),
repeat_interval_ms_(repeat_interval_ms),
intended_run_time_ms_(-1) {}
private:
bool Run() override {
bool task_completed = true;
if (repeat_interval_ms_ > 0) {
// This is not a one-off frame. Check if the frame interval for this
// task queue is the same same as the current configured frame rate.
uint32_t current_interval_ms =
1000 / frame_generator_capturer_->GetCurrentConfiguredFramerate();
if (repeat_interval_ms_ != current_interval_ms) {
// Frame rate has changed since task was started, create a new instance.
rtc::TaskQueue::Current()->PostDelayedTask(
std::unique_ptr<rtc::QueuedTask>(new InsertFrameTask(
frame_generator_capturer_, current_interval_ms)),
current_interval_ms);
} else {
// Schedule the next frame capture event to happen at approximately the
// correct absolute time point.
int64_t delay_ms;
int64_t time_now_ms = rtc::TimeMillis();
if (intended_run_time_ms_ > 0) {
delay_ms = time_now_ms - intended_run_time_ms_;
} else {
delay_ms = 0;
intended_run_time_ms_ = time_now_ms;
}
intended_run_time_ms_ += repeat_interval_ms_;
if (delay_ms < repeat_interval_ms_) {
rtc::TaskQueue::Current()->PostDelayedTask(
std::unique_ptr<rtc::QueuedTask>(this),
repeat_interval_ms_ - delay_ms);
} else {
rtc::TaskQueue::Current()->PostDelayedTask(
std::unique_ptr<rtc::QueuedTask>(this), 0);
LOG(LS_ERROR)
<< "Frame Generator Capturer can't keep up with requested fps";
}
// Repost of this instance, make sure it is not deleted.
task_completed = false;
}
}
frame_generator_capturer_->InsertFrame();
// Task should be deleted only if it's not repeating.
return task_completed;
}
webrtc::test::FrameGeneratorCapturer* const frame_generator_capturer_;
const uint32_t repeat_interval_ms_;
int64_t intended_run_time_ms_;
};
FrameGeneratorCapturer* FrameGeneratorCapturer::Create(int width,
int height,
int target_fps,
Clock* clock) {
std::unique_ptr<FrameGeneratorCapturer> capturer(new FrameGeneratorCapturer(
clock, FrameGenerator::CreateSquareGenerator(width, height), 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) {
std::unique_ptr<FrameGeneratorCapturer> capturer(new 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(
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)),
target_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(
std::unique_ptr<rtc::QueuedTask>(
new InsertFrameTask(this, 1000 / framerate_fps)),
1000 / framerate_fps);
return true;
}
void FrameGeneratorCapturer::InsertFrame() {
rtc::CritScope cs(&lock_);
if (sending_) {
VideoFrame* 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_) {
rtc::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::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();
VideoCapturer::AddOrUpdateSink(sink, resolution_wants);
// Ignore any requests for framerate higher than initially configured.
if (wants.max_framerate_fps < target_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,
// therefore repeat_interval_ms is 0 in InsertFrameTask()
task_queue_.PostTask(
std::unique_ptr<rtc::QueuedTask>(new InsertFrameTask(this, 0)));
}
int FrameGeneratorCapturer::GetCurrentConfiguredFramerate() {
rtc::CritScope cs(&lock_);
if (wanted_fps_ && *wanted_fps_ < target_fps_)
return *wanted_fps_;
return target_fps_;
}
} // namespace test
} // namespace webrtc