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/*
* Copyright (c) 2014 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/cropping_window_capturer.h"
#include <stddef.h>
#include <utility>
#include "modules/desktop_capture/cropped_desktop_frame.h"
#include "rtc_base/logging.h"
namespace webrtc {
CroppingWindowCapturer::CroppingWindowCapturer(
const DesktopCaptureOptions& options)
: options_(options),
callback_(nullptr),
window_capturer_(DesktopCapturer::CreateRawWindowCapturer(options)),
selected_window_(kNullWindowId),
excluded_window_(kNullWindowId) {}
CroppingWindowCapturer::~CroppingWindowCapturer() {}
void CroppingWindowCapturer::Start(DesktopCapturer::Callback* callback) {
callback_ = callback;
window_capturer_->Start(callback);
}
void CroppingWindowCapturer::SetSharedMemoryFactory(
std::unique_ptr<SharedMemoryFactory> shared_memory_factory) {
window_capturer_->SetSharedMemoryFactory(std::move(shared_memory_factory));
}
void CroppingWindowCapturer::CaptureFrame() {
if (ShouldUseScreenCapturer()) {
if (!screen_capturer_.get()) {
screen_capturer_ = DesktopCapturer::CreateRawScreenCapturer(options_);
if (excluded_window_) {
screen_capturer_->SetExcludedWindow(excluded_window_);
}
screen_capturer_->Start(this);
}
screen_capturer_->CaptureFrame();
} else {
window_capturer_->CaptureFrame();
}
}
void CroppingWindowCapturer::SetExcludedWindow(WindowId window) {
excluded_window_ = window;
if (screen_capturer_.get()) {
screen_capturer_->SetExcludedWindow(window);
}
}
bool CroppingWindowCapturer::GetSourceList(SourceList* sources) {
return window_capturer_->GetSourceList(sources);
}
bool CroppingWindowCapturer::SelectSource(SourceId id) {
if (window_capturer_->SelectSource(id)) {
selected_window_ = id;
return true;
}
return false;
}
bool CroppingWindowCapturer::FocusOnSelectedSource() {
return window_capturer_->FocusOnSelectedSource();
}
void CroppingWindowCapturer::OnCaptureResult(
DesktopCapturer::Result result,
std::unique_ptr<DesktopFrame> screen_frame) {
if (!ShouldUseScreenCapturer()) {
RTC_LOG(LS_INFO) << "Window no longer on top when ScreenCapturer finishes";
window_capturer_->CaptureFrame();
return;
}
if (result != Result::SUCCESS) {
RTC_LOG(LS_WARNING) << "ScreenCapturer failed to capture a frame";
callback_->OnCaptureResult(result, nullptr);
return;
}
DesktopRect window_rect = GetWindowRectInVirtualScreen();
if (window_rect.is_empty()) {
RTC_LOG(LS_WARNING) << "Window rect is empty";
callback_->OnCaptureResult(Result::ERROR_TEMPORARY, nullptr);
return;
}
std::unique_ptr<DesktopFrame> cropped_frame =
CreateCroppedDesktopFrame(std::move(screen_frame), window_rect);
if (!cropped_frame) {
RTC_LOG(LS_WARNING) << "Window is outside of the captured display";
callback_->OnCaptureResult(Result::ERROR_TEMPORARY, nullptr);
return;
}
callback_->OnCaptureResult(Result::SUCCESS, std::move(cropped_frame));
}
bool CroppingWindowCapturer::IsOccluded(const DesktopVector& pos) {
// Returns true if either capturer returns true.
if (window_capturer_->IsOccluded(pos)) {
return true;
}
if (screen_capturer_ != nullptr && screen_capturer_->IsOccluded(pos)) {
return true;
}
return false;
}
#if !defined(WEBRTC_WIN)
// CroppingWindowCapturer is implemented only for windows. On other platforms
// the regular window capturer is used.
// static
std::unique_ptr<DesktopCapturer> CroppingWindowCapturer::CreateCapturer(
const DesktopCaptureOptions& options) {
return DesktopCapturer::CreateWindowCapturer(options);
}
#endif
} // namespace webrtc
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