Add proof-of-concept screen sharing on Windows.

Telegram/SourceFiles/calls/calls_group_call.cpp

@@ -368,6 +368,9 @@ GroupCall::GroupCall(
 			_realChanges.fire_copy(real);
 		}, _lifetime);
 	}
+
+	setupMediaDevices();
+
 	if (_id) {
 		join(inputCall);
 	} else {
@@ -376,26 +379,31 @@ GroupCall::GroupCall(
 	if (_scheduleDate) {
 		saveDefaultJoinAs(_joinAs);
 	}
-
-	_mediaDevices->audioInputId(
-	) | rpl::start_with_next([=](QString id) {
-		_audioInputId = id;
-		if (_instance) {
-			_instance->setAudioInputDevice(id.toStdString());
-		}
-	}, _lifetime);
-
-	_mediaDevices->audioOutputId(
-	) | rpl::start_with_next([=](QString id) {
-		_audioOutputId = id;
-		if (_instance) {
-			_instance->setAudioOutputDevice(id.toStdString());
-		}
-	}, _lifetime);
 }
 
 GroupCall::~GroupCall() {
 	destroyController();
+	switchToCamera();
+}
+
+bool GroupCall::isScreenSharing() const {
+	return (_videoDeviceId != _videoInputId);
+}
+
+void GroupCall::switchToCamera() {
+	if (!_videoCapture || !isScreenSharing()) {
+		return;
+	}
+	_videoDeviceId = _videoInputId;
+	_videoCapture->switchToDevice(_videoDeviceId.toStdString());
+}
+
+void GroupCall::switchToScreenSharing() {
+	if (isScreenSharing()) {
+		return;
+	}
+	_videoDeviceId = "desktop_capturer_";
+	_videoCapture->switchToDevice(_videoDeviceId.toStdString());
 }
 
 void GroupCall::setScheduledDate(TimeId date) {
@@ -1322,6 +1330,41 @@ void GroupCall::applyOtherParticipantUpdate(
 	});
 }
 
+void GroupCall::setupMediaDevices() {
+	_mediaDevices->audioInputId(
+	) | rpl::start_with_next([=](QString id) {
+		_audioInputId = id;
+		if (_instance) {
+			_instance->setAudioInputDevice(id.toStdString());
+		}
+	}, _lifetime);
+
+	_mediaDevices->audioOutputId(
+	) | rpl::start_with_next([=](QString id) {
+		_audioOutputId = id;
+		if (_instance) {
+			_instance->setAudioOutputDevice(id.toStdString());
+		}
+	}, _lifetime);
+
+	_mediaDevices->videoInputId(
+	) | rpl::start_with_next([=](QString id) {
+		const auto usedCamera = !isScreenSharing();
+		_videoInputId = id;
+		if (_videoCapture && usedCamera) {
+			_videoCapture->switchToDevice(_videoDeviceId.toStdString());
+		}
+	}, _lifetime);
+	setupOutgoingVideo();
+}
+
+void GroupCall::setupOutgoingVideo() {
+	_videoCapture = _delegate->groupCallGetVideoCapture();
+	_videoOutgoing->setState(Webrtc::VideoState::Active);
+	_videoCapture->setOutput(_videoOutgoing->sink());
+	_videoDeviceId = _videoInputId;
+}
+
 void GroupCall::changeTitle(const QString &title) {
 	const auto real = lookupReal();
 	if (!real || real->title() == title) {
@@ -1372,12 +1415,6 @@ void GroupCall::ensureControllerCreated() {
 	}
 	const auto &settings = Core::App().settings();
 
-	if (!_videoCapture) {
-		_videoCapture = _delegate->groupCallGetVideoCapture();
-		_videoOutgoing->setState(Webrtc::VideoState::Active);
-		_videoCapture->setOutput(_videoOutgoing->sink());
-	}
-
 	const auto weak = base::make_weak(this);
 	const auto myLevel = std::make_shared<tgcalls::GroupLevelValue>();
 	tgcalls::GroupInstanceDescriptor descriptor = {
@@ -1821,6 +1858,10 @@ void GroupCall::setCurrentAudioDevice(bool input, const QString &deviceId) {
 	}
 }
 
+void GroupCall::setCurrentVideoDevice(const QString &deviceId) {
+	_mediaDevices->switchToVideoInput(deviceId);
+}
+
 void GroupCall::toggleMute(const Group::MuteRequest &data) {
 	if (data.locallyOnly) {
 		applyParticipantLocally(data.peer, data.mute, std::nullopt);

Telegram/SourceFiles/calls/calls_group_call.h

@@ -209,6 +209,10 @@ public:
 	static constexpr auto kSpeakLevelThreshold = 0.2;
 
 	void setCurrentAudioDevice(bool input, const QString &deviceId);
+	void setCurrentVideoDevice(const QString &deviceId);
+	bool isScreenSharing() const;
+	void switchToCamera();
+	void switchToScreenSharing();
 	//void setAudioVolume(bool input, float level);
 	void setAudioDuckingEnabled(bool enabled);
 
@@ -314,6 +318,9 @@ private:
 	void applySelfUpdate(const MTPDgroupCallParticipant &data);
 	void applyOtherParticipantUpdate(const MTPDgroupCallParticipant &data);
 
+	void setupMediaDevices();
+	void setupOutgoingVideo();
+
 	[[nodiscard]] MTPInputGroupCall inputCall() const;
 
 	const not_null<Delegate*> _delegate;
@@ -377,6 +384,8 @@ private:
 	std::unique_ptr<Webrtc::MediaDevices> _mediaDevices;
 	QString _audioInputId;
 	QString _audioOutputId;
+	QString _videoInputId;
+	QString _videoDeviceId;
 
 	rpl::lifetime _lifetime;
 

Telegram/SourceFiles/calls/calls_group_panel.cpp

@@ -673,7 +673,12 @@ void Panel::refreshLeftButton() {
 		_share.destroy();
 		_settings.create(widget(), st::groupCallSettings);
 		_settings->setClickedCallback([=] {
-			_layerBg->showBox(Box(SettingsBox, _call));
+			if (_call->isScreenSharing()) {
+				_call->switchToCamera();
+			} else {
+				_call->switchToScreenSharing();
+			}
+			//_layerBg->showBox(Box(SettingsBox, _call));
 		});
 		_settings->setText(tr::lng_group_call_settings());
 	}

Telegram/cmake/lib_tgcalls.cmake

@@ -56,6 +56,19 @@ PRIVATE
     VideoCaptureInterfaceImpl.h
     VideoCapturerInterface.h
 
+    # Desktop capturer
+    desktop_capturer/DesktopCaptureSource.h
+    desktop_capturer/DesktopCaptureSource.mm
+    desktop_capturer/DesktopCaptureSourceHelper.h
+    desktop_capturer/DesktopCaptureSourceHelper.mm
+    desktop_capturer/DesktopCaptureSourceManager.h
+    desktop_capturer/DesktopCaptureSourceManager.mm
+    desktop_capturer/DesktopCaptureSourceView.h
+    desktop_capturer/DesktopCaptureSourceView.mm
+    desktop_capturer/DesktopSharingCapturer.h
+    desktop_capturer/DesktopSharingCapturer.mm
+
+    # Group calls
     group/GroupInstanceCustomImpl.cpp
     group/GroupInstanceCustomImpl.h
     group/GroupNetworkManager.cpp
@@ -80,6 +93,8 @@ PRIVATE
     platform/darwin/DarwinInterface.mm
     platform/darwin/GLVideoView.h
     platform/darwin/GLVideoView.mm
+    platform/darwin/GLVideoViewMac.h
+    platform/darwin/GLVideoViewMac.mm
     platform/darwin/TGRTCCVPixelBuffer.h
     platform/darwin/TGRTCCVPixelBuffer.mm
     platform/darwin/TGRTCDefaultVideoDecoderFactory.h
@@ -108,6 +123,8 @@ PRIVATE
     # POSIX
 
     # Teleram Desktop
+    platform/tdesktop/DesktopCapturer.cpp
+    platform/tdesktop/DesktopCapturer.h
     platform/tdesktop/DesktopInterface.cpp
     platform/tdesktop/DesktopInterface.h
     platform/tdesktop/VideoCapturerInterfaceImpl.cpp
@@ -122,6 +139,19 @@ PRIVATE
     reference/InstanceImplReference.h
 )
 
+remove_target_sources(lib_tgcalls ${tgcalls_loc}
+    desktop_capturer/DesktopCaptureSource.h
+    desktop_capturer/DesktopCaptureSource.mm
+    desktop_capturer/DesktopCaptureSourceHelper.h
+    desktop_capturer/DesktopCaptureSourceHelper.mm
+    desktop_capturer/DesktopCaptureSourceManager.h
+    desktop_capturer/DesktopCaptureSourceManager.mm
+    desktop_capturer/DesktopCaptureSourceView.h
+    desktop_capturer/DesktopCaptureSourceView.mm
+    desktop_capturer/DesktopSharingCapturer.h
+    desktop_capturer/DesktopSharingCapturer.mm
+)
+
 target_link_libraries(lib_tgcalls
 PRIVATE
     desktop-app::external_webrtc
@@ -152,6 +182,8 @@ elseif (APPLE)
     remove_target_sources(lib_tgcalls ${tgcalls_loc}
         platform/darwin/GLVideoView.h
         platform/darwin/GLVideoView.mm
+        platform/darwin/GLVideoViewMac.h
+        platform/darwin/GLVideoViewMac.mm
         platform/darwin/VideoCameraCapturer.h
         platform/darwin/VideoCameraCapturer.mm
         platform/darwin/VideoMetalView.h