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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 "test/frame_generator_capturer.h"
#include <algorithm>
#include <cmath>
#include <limits>
#include <memory>
#include <utility>
#include <vector>
#include "absl/strings/match.h"
#include "api/test/create_frame_generator.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
#include "rtc_base/task_queue.h"
#include "rtc_base/time_utils.h"
#include "system_wrappers/include/clock.h"
#include "test/testsupport/file_utils.h"
namespace webrtc {
namespace test {
namespace {
std::string TransformFilePath(std::string path) {
static const std::string resource_prefix = "res://";
int ext_pos = path.rfind('.');
if (ext_pos < 0) {
return test::ResourcePath(path, "yuv");
} else if (absl::StartsWith(path, resource_prefix)) {
std::string name = path.substr(resource_prefix.length(), ext_pos);
std::string ext = path.substr(ext_pos, path.size());
return test::ResourcePath(name, ext);
}
return path;
}
} // namespace
FrameGeneratorCapturer::FrameGeneratorCapturer(
Clock* clock,
std::unique_ptr<FrameGeneratorInterface> frame_generator,
int target_fps,
TaskQueueFactory& task_queue_factory)
: clock_(clock),
sending_(true),
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_(task_queue_factory.CreateTaskQueue(
"FrameGenCapQ",
TaskQueueFactory::Priority::HIGH)) {
RTC_DCHECK(frame_generator_);
RTC_DCHECK_GT(target_fps, 0);
}
FrameGeneratorCapturer::~FrameGeneratorCapturer() {
Stop();
}
std::unique_ptr<FrameGeneratorCapturer> FrameGeneratorCapturer::Create(
Clock* clock,
TaskQueueFactory& task_queue_factory,
FrameGeneratorCapturerConfig::SquaresVideo config) {
return std::make_unique<FrameGeneratorCapturer>(
clock,
CreateSquareFrameGenerator(config.width, config.height,
config.pixel_format, config.num_squares),
config.framerate, task_queue_factory);
}
std::unique_ptr<FrameGeneratorCapturer> FrameGeneratorCapturer::Create(
Clock* clock,
TaskQueueFactory& task_queue_factory,
FrameGeneratorCapturerConfig::SquareSlides config) {
return std::make_unique<FrameGeneratorCapturer>(
clock,
CreateSlideFrameGenerator(
config.width, config.height,
/*frame_repeat_count*/ config.change_interval.seconds<double>() *
config.framerate),
config.framerate, task_queue_factory);
}
std::unique_ptr<FrameGeneratorCapturer> FrameGeneratorCapturer::Create(
Clock* clock,
TaskQueueFactory& task_queue_factory,
FrameGeneratorCapturerConfig::VideoFile config) {
RTC_CHECK(config.width && config.height);
return std::make_unique<FrameGeneratorCapturer>(
clock,
CreateFromYuvFileFrameGenerator({TransformFilePath(config.name)},
config.width, config.height,
/*frame_repeat_count*/ 1),
config.framerate, task_queue_factory);
}
std::unique_ptr<FrameGeneratorCapturer> FrameGeneratorCapturer::Create(
Clock* clock,
TaskQueueFactory& task_queue_factory,
FrameGeneratorCapturerConfig::ImageSlides config) {
std::unique_ptr<FrameGeneratorInterface> slides_generator;
std::vector<std::string> paths = config.paths;
for (std::string& path : paths)
path = TransformFilePath(path);
if (config.crop.width || config.crop.height) {
TimeDelta pause_duration =
config.change_interval - config.crop.scroll_duration;
RTC_CHECK_GE(pause_duration, TimeDelta::Zero());
int crop_width = config.crop.width.value_or(config.width);
int crop_height = config.crop.height.value_or(config.height);
RTC_CHECK_LE(crop_width, config.width);
RTC_CHECK_LE(crop_height, config.height);
slides_generator = CreateScrollingInputFromYuvFilesFrameGenerator(
clock, paths, config.width, config.height, crop_width, crop_height,
config.crop.scroll_duration.ms(), pause_duration.ms());
} else {
slides_generator = CreateFromYuvFileFrameGenerator(
paths, config.width, config.height,
/*frame_repeat_count*/ config.change_interval.seconds<double>() *
config.framerate);
}
return std::make_unique<FrameGeneratorCapturer>(
clock, std::move(slides_generator), config.framerate, task_queue_factory);
}
std::unique_ptr<FrameGeneratorCapturer> FrameGeneratorCapturer::Create(
Clock* clock,
TaskQueueFactory& task_queue_factory,
const FrameGeneratorCapturerConfig& config) {
if (config.video_file) {
return Create(clock, task_queue_factory, *config.video_file);
} else if (config.image_slides) {
return Create(clock, task_queue_factory, *config.image_slides);
} else if (config.squares_slides) {
return Create(clock, task_queue_factory, *config.squares_slides);
} else {
return Create(clock, task_queue_factory,
config.squares_video.value_or(
FrameGeneratorCapturerConfig::SquaresVideo()));
}
}
void FrameGeneratorCapturer::SetFakeRotation(VideoRotation rotation) {
MutexLock lock(&lock_);
fake_rotation_ = rotation;
}
void FrameGeneratorCapturer::SetFakeColorSpace(
absl::optional<ColorSpace> color_space) {
MutexLock lock(&lock_);
fake_color_space_ = color_space;
}
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;
frame_task_ = RepeatingTaskHandle::DelayedStart(
task_queue_.Get(),
TimeDelta::Seconds(1) / GetCurrentConfiguredFramerate(), [this] {
InsertFrame();
return TimeDelta::Seconds(1) / GetCurrentConfiguredFramerate();
});
return true;
}
void FrameGeneratorCapturer::InsertFrame() {
absl::optional<Resolution> resolution;
{
MutexLock lock(&lock_);
if (sending_) {
FrameGeneratorInterface::VideoFrameData frame_data =
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_data = frame_generator_->NextFrame();
VideoFrame frame =
VideoFrame::Builder()
.set_video_frame_buffer(frame_data.buffer)
.set_rotation(fake_rotation_)
.set_timestamp_us(clock_->TimeInMicroseconds())
.set_ntp_time_ms(clock_->CurrentNtpInMilliseconds())
.set_update_rect(frame_data.update_rect)
.set_color_space(fake_color_space_)
.build();
if (first_frame_capture_time_ == -1) {
first_frame_capture_time_ = frame.ntp_time_ms();
}
resolution = Resolution{frame.width(), frame.height()};
TestVideoCapturer::OnFrame(frame);
}
}
if (resolution) {
MutexLock lock(&stats_lock_);
source_resolution_ = resolution;
}
}
absl::optional<FrameGeneratorCapturer::Resolution>
FrameGeneratorCapturer::GetResolution() {
MutexLock lock(&stats_lock_);
return source_resolution_;
}
void FrameGeneratorCapturer::Start() {
{
MutexLock lock(&lock_);
sending_ = true;
}
if (!frame_task_.Running()) {
frame_task_ = RepeatingTaskHandle::Start(task_queue_.Get(), [this] {
InsertFrame();
return TimeDelta::Seconds(1) / GetCurrentConfiguredFramerate();
});
}
}
void FrameGeneratorCapturer::Stop() {
MutexLock lock(&lock_);
sending_ = false;
}
void FrameGeneratorCapturer::ChangeResolution(size_t width, size_t height) {
MutexLock lock(&lock_);
frame_generator_->ChangeResolution(width, height);
}
void FrameGeneratorCapturer::ChangeFramerate(int target_framerate) {
MutexLock lock(&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::OnOutputFormatRequest(
int width,
int height,
const absl::optional<int>& max_fps) {
TestVideoCapturer::OnOutputFormatRequest(width, height, max_fps);
}
void FrameGeneratorCapturer::SetSinkWantsObserver(SinkWantsObserver* observer) {
MutexLock lock(&lock_);
RTC_DCHECK(!sink_wants_observer_);
sink_wants_observer_ = observer;
}
void FrameGeneratorCapturer::AddOrUpdateSink(
rtc::VideoSinkInterface<VideoFrame>* sink,
const rtc::VideoSinkWants& wants) {
TestVideoCapturer::AddOrUpdateSink(sink, wants);
MutexLock lock(&lock_);
if (sink_wants_observer_) {
// Tests need to observe unmodified sink wants.
sink_wants_observer_->OnSinkWantsChanged(sink, wants);
}
UpdateFps(GetSinkWants().max_framerate_fps);
}
void FrameGeneratorCapturer::RemoveSink(
rtc::VideoSinkInterface<VideoFrame>* sink) {
TestVideoCapturer::RemoveSink(sink);
MutexLock lock(&lock_);
UpdateFps(GetSinkWants().max_framerate_fps);
}
void FrameGeneratorCapturer::UpdateFps(int max_fps) {
if (max_fps < target_capture_fps_) {
wanted_fps_.emplace(max_fps);
} else {
wanted_fps_.reset();
}
}
void FrameGeneratorCapturer::ForceFrame() {
// One-time non-repeating task,
task_queue_.PostTask([this] { InsertFrame(); });
}
int FrameGeneratorCapturer::GetCurrentConfiguredFramerate() {
MutexLock lock(&lock_);
if (wanted_fps_ && *wanted_fps_ < target_capture_fps_)
return *wanted_fps_;
return target_capture_fps_;
}
} // namespace test
} // namespace webrtc