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/*
* Copyright 2020 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 "video/video_source_sink_controller.h"
#include <algorithm>
#include <limits>
#include <utility>
#include "rtc_base/logging.h"
#include "rtc_base/numerics/safe_conversions.h"
#include "rtc_base/strings/string_builder.h"
namespace webrtc {
namespace {
std::string WantsToString(const rtc::VideoSinkWants& wants) {
rtc::StringBuilder ss;
ss << "max_fps=" << wants.max_framerate_fps
<< " max_pixel_count=" << wants.max_pixel_count << " target_pixel_count="
<< (wants.target_pixel_count.has_value()
? std::to_string(wants.target_pixel_count.value())
: "null");
return ss.Release();
}
} // namespace
VideoSourceSinkController::VideoSourceSinkController(
rtc::VideoSinkInterface<VideoFrame>* sink,
rtc::VideoSourceInterface<VideoFrame>* source)
: sink_(sink), source_(source) {
RTC_DCHECK(sink_);
}
void VideoSourceSinkController::SetSource(
rtc::VideoSourceInterface<VideoFrame>* source) {
rtc::VideoSourceInterface<VideoFrame>* old_source;
rtc::VideoSinkWants wants;
{
MutexLock lock(&mutex_);
old_source = source_;
source_ = source;
wants = CurrentSettingsToSinkWants();
}
if (old_source != source && old_source)
old_source->RemoveSink(sink_);
if (!source)
return;
source->AddOrUpdateSink(sink_, wants);
}
void VideoSourceSinkController::PushSourceSinkSettings() {
MutexLock lock(&mutex_);
if (!source_)
return;
rtc::VideoSinkWants wants = CurrentSettingsToSinkWants();
RTC_LOG(INFO) << "Pushing SourceSink restrictions: " << WantsToString(wants);
source_->AddOrUpdateSink(sink_, wants);
}
VideoSourceRestrictions VideoSourceSinkController::restrictions() const {
MutexLock lock(&mutex_);
return restrictions_;
}
absl::optional<size_t> VideoSourceSinkController::pixels_per_frame_upper_limit()
const {
MutexLock lock(&mutex_);
return pixels_per_frame_upper_limit_;
}
absl::optional<double> VideoSourceSinkController::frame_rate_upper_limit()
const {
MutexLock lock(&mutex_);
return frame_rate_upper_limit_;
}
bool VideoSourceSinkController::rotation_applied() const {
MutexLock lock(&mutex_);
return rotation_applied_;
}
int VideoSourceSinkController::resolution_alignment() const {
MutexLock lock(&mutex_);
return resolution_alignment_;
}
void VideoSourceSinkController::SetRestrictions(
VideoSourceRestrictions restrictions) {
MutexLock lock(&mutex_);
restrictions_ = std::move(restrictions);
}
void VideoSourceSinkController::SetPixelsPerFrameUpperLimit(
absl::optional<size_t> pixels_per_frame_upper_limit) {
MutexLock lock(&mutex_);
pixels_per_frame_upper_limit_ = std::move(pixels_per_frame_upper_limit);
}
void VideoSourceSinkController::SetFrameRateUpperLimit(
absl::optional<double> frame_rate_upper_limit) {
MutexLock lock(&mutex_);
frame_rate_upper_limit_ = std::move(frame_rate_upper_limit);
}
void VideoSourceSinkController::SetRotationApplied(bool rotation_applied) {
MutexLock lock(&mutex_);
rotation_applied_ = rotation_applied;
}
void VideoSourceSinkController::SetResolutionAlignment(
int resolution_alignment) {
MutexLock lock(&mutex_);
resolution_alignment_ = resolution_alignment;
}
// RTC_EXCLUSIVE_LOCKS_REQUIRED(mutex_)
rtc::VideoSinkWants VideoSourceSinkController::CurrentSettingsToSinkWants()
const {
rtc::VideoSinkWants wants;
wants.rotation_applied = rotation_applied_;
// |wants.black_frames| is not used, it always has its default value false.
wants.max_pixel_count =
rtc::dchecked_cast<int>(restrictions_.max_pixels_per_frame().value_or(
std::numeric_limits<int>::max()));
wants.target_pixel_count =
restrictions_.target_pixels_per_frame().has_value()
? absl::optional<int>(rtc::dchecked_cast<int>(
restrictions_.target_pixels_per_frame().value()))
: absl::nullopt;
wants.max_framerate_fps =
restrictions_.max_frame_rate().has_value()
? static_cast<int>(restrictions_.max_frame_rate().value())
: std::numeric_limits<int>::max();
wants.resolution_alignment = resolution_alignment_;
wants.max_pixel_count =
std::min(wants.max_pixel_count,
rtc::dchecked_cast<int>(pixels_per_frame_upper_limit_.value_or(
std::numeric_limits<int>::max())));
wants.max_framerate_fps =
std::min(wants.max_framerate_fps,
frame_rate_upper_limit_.has_value()
? static_cast<int>(frame_rate_upper_limit_.value())
: std::numeric_limits<int>::max());
return wants;
}
} // namespace webrtc
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