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/*
* Copyright (c) 2019 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 "modules/desktop_capture/full_screen_window_detector.h"
#include "modules/desktop_capture/full_screen_application_handler.h"
#include "rtc_base/time_utils.h"
namespace webrtc {
FullScreenWindowDetector::FullScreenWindowDetector(
ApplicationHandlerFactory application_handler_factory)
: application_handler_factory_(application_handler_factory),
last_update_time_ms_(0),
previous_source_id_(0),
no_handler_source_id_(0) {}
DesktopCapturer::SourceId FullScreenWindowDetector::FindFullScreenWindow(
DesktopCapturer::SourceId original_source_id) {
if (app_handler_ == nullptr ||
app_handler_->GetSourceId() != original_source_id) {
return 0;
}
return app_handler_->FindFullScreenWindow(window_list_, last_update_time_ms_);
}
void FullScreenWindowDetector::UpdateWindowListIfNeeded(
DesktopCapturer::SourceId original_source_id,
rtc::FunctionView<bool(DesktopCapturer::SourceList*)> get_sources) {
const bool skip_update = previous_source_id_ != original_source_id;
previous_source_id_ = original_source_id;
// Here is an attempt to avoid redundant creating application handler in case
// when an instance of WindowCapturer is used to generate a thumbnail to show
// in picker by calling SelectSource and CaptureFrame for every available
// source.
if (skip_update) {
return;
}
CreateApplicationHandlerIfNeeded(original_source_id);
if (app_handler_ == nullptr) {
// There is no FullScreenApplicationHandler specific for
// current application
return;
}
constexpr int64_t kUpdateIntervalMs = 500;
if ((rtc::TimeMillis() - last_update_time_ms_) <= kUpdateIntervalMs) {
return;
}
DesktopCapturer::SourceList window_list;
if (get_sources(&window_list)) {
last_update_time_ms_ = rtc::TimeMillis();
window_list_.swap(window_list);
}
}
void FullScreenWindowDetector::CreateApplicationHandlerIfNeeded(
DesktopCapturer::SourceId source_id) {
if (no_handler_source_id_ == source_id) {
return;
}
if (app_handler_ == nullptr || app_handler_->GetSourceId() != source_id) {
app_handler_ = application_handler_factory_
? application_handler_factory_(source_id)
: nullptr;
}
if (app_handler_ == nullptr) {
no_handler_source_id_ = source_id;
}
}
} // namespace webrtc
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