Support broadcast mode in voice chats.

Telegram/SourceFiles/calls/calls_choose_join_as.cpp

@@ -226,9 +226,14 @@ void ChooseJoinAsProcess::start(
 			return list;
 		});
 		if (list.empty()) {
+			// #TODO calls in case of anonymous group admin show lng_group_call_no_anonymous
 			_request->showToast("No way to join this voice chat :(");
 			return;
-		} else if (list.size() == 1 && list.front() == self) {
+		} else if (list.size() == 1
+			&& list.front() == self
+			&& (!peer->isChannel()
+				|| !peer->asChannel()->amAnonymous()
+				|| (peer->isBroadcast() && !peer->canWrite()))) {
 			info.possibleJoinAs = std::move(list);
 			finish(info);
 			return;

Telegram/SourceFiles/calls/calls_group_call.cpp

@@ -70,6 +70,28 @@ constexpr auto kPlayConnectingEach = crl::time(1056) + 2 * crl::time(1000);
 
 } // namespace
 
+class GroupCall::LoadPartTask final : public tgcalls::BroadcastPartTask {
+public:
+	LoadPartTask(
+		base::weak_ptr<GroupCall> call,
+		TimeId date,
+		Fn<void(tgcalls::BroadcastPart&&)> done);
+
+	[[nodiscard]] TimeId date() const {
+		return _date;
+	}
+
+	void done(tgcalls::BroadcastPart &&part);
+	void cancel() override;
+
+private:
+	const base::weak_ptr<GroupCall> _call;
+	const TimeId _date = 0;
+	Fn<void(tgcalls::BroadcastPart &&)> _done;
+	QMutex _mutex;
+
+};
+
 [[nodiscard]] bool IsGroupCallAdmin(
 		not_null<PeerData*> peer,
 		not_null<PeerData*> participantPeer) {
@@ -80,7 +102,7 @@ constexpr auto kPlayConnectingEach = crl::time(1056) + 2 * crl::time(1000);
 	if (const auto chat = peer->asChat()) {
 		return chat->admins.contains(user)
 			|| (chat->creator == user->bareId());
-	} else if (const auto group = peer->asMegagroup()) {
+	} else if (const auto group = peer->asChannel()) {
 		if (const auto mgInfo = group->mgInfo.get()) {
 			if (mgInfo->creator == user) {
 				return true;
@@ -96,6 +118,40 @@ constexpr auto kPlayConnectingEach = crl::time(1056) + 2 * crl::time(1000);
 	return false;
 }
 
+GroupCall::LoadPartTask::LoadPartTask(
+	base::weak_ptr<GroupCall> call,
+	TimeId date,
+	Fn<void(tgcalls::BroadcastPart &&)> done)
+: _call(std::move(call))
+, _date(date ? date : base::unixtime::now())
+, _done(std::move(done)) {
+}
+
+void GroupCall::LoadPartTask::done(tgcalls::BroadcastPart &&part) {
+	QMutexLocker lock(&_mutex);
+	if (_done) {
+		base::take(_done)(std::move(part));
+	}
+}
+
+void GroupCall::LoadPartTask::cancel() {
+	QMutexLocker lock(&_mutex);
+	if (!_done) {
+		return;
+	}
+	_done = nullptr;
+	lock.unlock();
+
+	if (_call) {
+		const auto that = this;
+		crl::on_main(_call, [weak = _call, that] {
+			if (const auto strong = weak.get()) {
+				strong->broadcastPartCancel(that);
+			}
+		});
+	}
+}
+
 GroupCall::GroupCall(
 	not_null<Delegate*> delegate,
 	Group::JoinInfo info,
@@ -264,7 +320,7 @@ void GroupCall::join(const MTPInputGroupCall &inputCall) {
 	setState(State::Joining);
 	if (const auto chat = _peer->asChat()) {
 		chat->setGroupCall(inputCall);
-	} else if (const auto group = _peer->asMegagroup()) {
+	} else if (const auto group = _peer->asChannel()) {
 		group->setGroupCall(inputCall);
 	} else {
 		Unexpected("Peer type in GroupCall::join.");
@@ -316,7 +372,8 @@ void GroupCall::rejoin() {
 
 	_mySsrc = 0;
 	setState(State::Joining);
-	createAndStartController();
+	ensureControllerCreated();
+	setInstanceMode(InstanceMode::None);
 	applyMeInCallLocally();
 	LOG(("Call Info: Requesting join payload."));
 
@@ -581,8 +638,11 @@ void GroupCall::handleUpdate(const MTPGroupCall &call) {
 			|| !_instance) {
 			return;
 		}
+		const auto streamDcId = MTP::BareDcId(
+			data.vstream_dc_id().value_or_empty());
 		if (const auto params = data.vparams()) {
 			params->match([&](const MTPDdataJSON &data) {
+				using ConnectionMode = tgcalls::GroupConnectionMode;
 				auto error = QJsonParseError{ 0, QJsonParseError::NoError };
 				const auto document = QJsonDocument::fromJson(
 					data.vdata().v,
@@ -597,6 +657,22 @@ void GroupCall::handleUpdate(const MTPGroupCall &call) {
 						"Not an object received in group call params."));
 					return;
 				}
+
+				const auto guard = gsl::finally([&] {
+					addParticipantsToInstance();
+				});
+
+				if (document.object().value("stream").toBool()) {
+					if (!streamDcId) {
+						LOG(("Api Error: Empty stream_dc_id in groupCall."));
+					}
+					_broadcastDcId = streamDcId
+						? streamDcId
+						: _peer->session().mtp().mainDcId();
+					setInstanceMode(InstanceMode::Stream);
+					return;
+				}
+
 				const auto readString = [](
 						const QJsonObject &object,
 						const char *key) {
@@ -634,12 +710,8 @@ void GroupCall::handleUpdate(const MTPGroupCall &call) {
 						.relPort = readString(object, "relPort"),
 					});
 				}
-				_instance->setConnectionMode(
-					tgcalls::GroupConnectionMode::GroupConnectionModeRtc);
+				setInstanceMode(InstanceMode::Rtc);
 				_instance->setJoinResponsePayload(payload, {});
-				_instancePayloadsDone = true;
-
-				addParticipantsToInstance();
 			});
 		}
 	}, [&](const MTPDgroupCallDiscarded &data) {
@@ -652,7 +724,9 @@ void GroupCall::handleUpdate(const MTPGroupCall &call) {
 
 void GroupCall::addParticipantsToInstance() {
 	const auto real = _peer->groupCall();
-	if (!real || (real->id() != _id) || !_instancePayloadsDone) {
+	if (!real
+		|| (real->id() != _id)
+		|| (_instanceMode == InstanceMode::None)) {
 		return;
 	}
 	for (const auto &participant : real->participants()) {
@@ -719,7 +793,10 @@ void GroupCall::handleUpdate(const MTPDupdateGroupCallParticipants &data) {
 
 	for (const auto &participant : data.vparticipants().v) {
 		participant.match([&](const MTPDgroupCallParticipant &data) {
-			if (!data.is_self()) {
+			const auto isSelf = data.is_self()
+				|| (data.is_min()
+					&& peerFromMTP(data.vpeer()) == _joinAs->id);
+			if (!isSelf) {
 				handleOtherParticipants(data);
 				return;
 			}
@@ -738,6 +815,10 @@ void GroupCall::handleUpdate(const MTPDupdateGroupCallParticipants &data) {
 			}
 			if (data.is_muted() && !data.is_can_self_unmute()) {
 				setMuted(MuteState::ForceMuted);
+			} else if (_instanceMode == InstanceMode::Stream) {
+				LOG(("Call Info: Rejoin after unforcemute in stream mode."));
+				setState(State::Joining);
+				rejoin();
 			} else if (muted() == MuteState::ForceMuted) {
 				setMuted(MuteState::Muted);
 			} else if (data.is_muted() && muted() != MuteState::Muted) {
@@ -763,7 +844,10 @@ void GroupCall::changeTitle(const QString &title) {
 	}).send();
 }
 
-void GroupCall::createAndStartController() {
+void GroupCall::ensureControllerCreated() {
+	if (_instance) {
+		return;
+	}
 	const auto &settings = Core::App().settings();
 
 	const auto weak = base::make_weak(this);
@@ -799,6 +883,18 @@ void GroupCall::createAndStartController() {
 				requestParticipantsInformation(ssrcs);
 			});
 		},
+		.requestBroadcastPart = [=](
+				int32_t date,
+				std::function<void(tgcalls::BroadcastPart &&)> done) {
+			auto result = std::make_shared<LoadPartTask>(
+				weak,
+				date,
+				std::move(done));
+			crl::on_main(weak, [=]() mutable {
+				broadcastPartStart(std::move(result));
+			});
+			return result;
+		}
 	};
 	if (Logs::DebugEnabled()) {
 		auto callLogFolder = cWorkingDir() + qsl("DebugLogs");
@@ -816,7 +912,6 @@ void GroupCall::createAndStartController() {
 	}
 
 	LOG(("Call Info: Creating group instance"));
-	_instancePayloadsDone = false;
 	_instance = std::make_unique<tgcalls::GroupInstanceCustomImpl>(
 		std::move(descriptor));
 
@@ -826,10 +921,70 @@ void GroupCall::createAndStartController() {
 	//raw->setAudioOutputDuckingEnabled(settings.callAudioDuckingEnabled());
 }
 
+void GroupCall::broadcastPartStart(std::shared_ptr<LoadPartTask> task) {
+	const auto raw = task.get();
+	const auto date = raw->date();
+	const auto finish = [=](tgcalls::BroadcastPart &&part) {
+		raw->done(std::move(part));
+		_broadcastParts.erase(raw);
+	};
+	using Status = tgcalls::BroadcastPart::Status;
+	const auto requestId = _api.request(MTPupload_GetFile(
+		MTP_flags(0),
+		MTP_inputGroupCallStream(
+			inputCall(),
+			MTP_long(uint64(date) * 1000),
+			MTP_int(0)),
+		MTP_int(0),
+		MTP_int(128 * 1024)
+	)).done([=](const MTPupload_File &result) {
+		result.match([&](const MTPDupload_file &data) {
+			const auto size = data.vbytes().v.size();
+			auto bytes = std::vector<uint8_t>(size);
+			memcpy(bytes.data(), data.vbytes().v.constData(), size);
+			finish({
+				.timestamp = date,
+				.responseTimestamp = date + 1., // #TODO calls extract from mtproto
+				.status = Status::Success,
+				.oggData = std::move(bytes),
+			});
+		}, [&](const MTPDupload_fileCdnRedirect &data) {
+			LOG(("Voice Chat Stream Error: fileCdnRedirect received."));
+			finish({
+				.timestamp = date,
+				.responseTimestamp = date + 1., // #TODO calls extract from mtproto
+				.status = Status::TooOld,
+			});
+		});
+	}).fail([=](const RPCError &error) {
+		const auto status = MTP::isTemporaryError(error)
+			? Status::NotReady
+			: Status::TooOld;
+		finish({
+			.timestamp = date,
+			.responseTimestamp = date + 1., // #TODO calls extract from mtproto
+			.status = status,
+		});
+	}).handleAllErrors().toDC(
+		MTP::groupCallStreamDcId(_broadcastDcId)
+	).send();
+	_broadcastParts.emplace(raw, LoadingPart{ std::move(task), requestId });
+}
+
+void GroupCall::broadcastPartCancel(not_null<LoadPartTask*> task) {
+	const auto i = _broadcastParts.find(task);
+	if (i != _broadcastParts.end()) {
+		_api.request(i->second.requestId).cancel();
+		_broadcastParts.erase(i);
+	}
+}
+
 void GroupCall::requestParticipantsInformation(
 		const std::vector<uint32_t> &ssrcs) {
 	const auto real = _peer->groupCall();
-	if (!real || real->id() != _id || !_instancePayloadsDone) {
+	if (!real
+		|| (real->id() != _id)
+		|| (_instanceMode == InstanceMode::None)) {
 		for (const auto ssrc : ssrcs) {
 			_unresolvedSsrcs.emplace(ssrc);
 		}
@@ -1000,6 +1155,22 @@ void GroupCall::setInstanceConnected(bool connected) {
 	}
 }
 
+void GroupCall::setInstanceMode(InstanceMode mode) {
+	Expects(_instance != nullptr);
+
+	_instanceMode = mode;
+
+	using Mode = tgcalls::GroupConnectionMode;
+	_instance->setConnectionMode([&] {
+		switch (_instanceMode) {
+		case InstanceMode::None: return Mode::GroupConnectionModeNone;
+		case InstanceMode::Rtc: return Mode::GroupConnectionModeRtc;
+		case InstanceMode::Stream: return Mode::GroupConnectionModeBroadcast;
+		}
+		Unexpected("Mode in GroupCall::setInstanceMode.");
+	}());
+}
+
 void GroupCall::maybeSendMutedUpdate(MuteState previous) {
 	// Send only Active <-> !Active changes.
 	const auto now = muted();

Telegram/SourceFiles/calls/calls_group_call.h

@@ -174,18 +174,35 @@ public:
 		return _lifetime;
 	}
 
+private:
+	class LoadPartTask;
+
+public:
+	void broadcastPartStart(std::shared_ptr<LoadPartTask> task);
+	void broadcastPartCancel(not_null<LoadPartTask*> task);
+
 private:
 	using GlobalShortcutValue = base::GlobalShortcutValue;
 
+	struct LoadingPart {
+		std::shared_ptr<LoadPartTask> task;
+		mtpRequestId requestId = 0;
+	};
+
 	enum class FinishType {
 		None,
 		Ended,
 		Failed,
 	};
+	enum class InstanceMode {
+		None,
+		Rtc,
+		Stream,
+	};
 
 	void handleRequestError(const RPCError &error);
 	void handleControllerError(const QString &error);
-	void createAndStartController();
+	void ensureControllerCreated();
 	void destroyController();
 
 	void setState(State state);
@@ -199,6 +216,7 @@ private:
 
 	void audioLevelsUpdated(const tgcalls::GroupLevelsUpdate &data);
 	void setInstanceConnected(bool connected);
+	void setInstanceMode(InstanceMode mode);
 	void checkLastSpoke();
 	void pushToTalkCancel();
 
@@ -233,11 +251,14 @@ private:
 	MTP::Sender _api;
 	rpl::variable<State> _state = State::Creating;
 	bool _instanceConnected = false;
-	bool _instancePayloadsDone = false;
+	InstanceMode _instanceMode = InstanceMode::None;
 	base::flat_set<uint32> _unresolvedSsrcs;
 	std::vector<tgcalls::GroupParticipantDescription> _preparedParticipants;
 	bool _addPreparedParticipantsScheduled = false;
 
+	MTP::DcId _broadcastDcId = 0;
+	base::flat_map<not_null<LoadPartTask*>, LoadingPart> _broadcastParts;
+
 	not_null<PeerData*> _joinAs;
 	std::vector<not_null<PeerData*>> _possibleJoinAs;
 

Telegram/SourceFiles/data/data_peer.cpp

@@ -904,7 +904,7 @@ bool PeerData::canManageGroupCall() const {
 	if (const auto chat = asChat()) {
 		return chat->amCreator()
 			|| (chat->adminRights() & ChatAdminRight::f_manage_call);
-	} else if (const auto group = asMegagroup()) {
+	} else if (const auto group = asChannel()) {
 		return group->amCreator()
 			|| (group->adminRights() & ChatAdminRight::f_manage_call);
 	}
@@ -914,7 +914,7 @@ bool PeerData::canManageGroupCall() const {
 Data::GroupCall *PeerData::groupCall() const {
 	if (const auto chat = asChat()) {
 		return chat->groupCall();
-	} else if (const auto group = asMegagroup()) {
+	} else if (const auto group = asChannel()) {
 		return group->groupCall();
 	}
 	return nullptr;
@@ -923,7 +923,7 @@ Data::GroupCall *PeerData::groupCall() const {
 PeerId PeerData::groupCallDefaultJoinAs() const {
 	if (const auto chat = asChat()) {
 		return chat->groupCallDefaultJoinAs();
-	} else if (const auto group = asMegagroup()) {
+	} else if (const auto group = asChannel()) {
 		return group->groupCallDefaultJoinAs();
 	}
 	return 0;

Telegram/SourceFiles/history/history_widget.cpp

@@ -5589,7 +5589,7 @@ void HistoryWidget::setupGroupCallTracker() {
 	Expects(_history != nullptr);
 
 	const auto peer = _history->peer;
-	if (!peer->asMegagroup() && !peer->asChat()) {
+	if (!peer->isChannel() && !peer->isChat()) {
 		_groupCallTracker = nullptr;
 		_groupCallBar = nullptr;
 		return;
@@ -5622,12 +5622,12 @@ void HistoryWidget::setupGroupCallTracker() {
 	) | rpl::start_with_next([=] {
 		const auto peer = _history->peer;
 		const auto channel = peer->asChannel();
-		if (channel && channel->amAnonymous()) {
+		/*if (channel && channel->amAnonymous()) { // #TODO calls
 			Ui::ShowMultilineToast({
 				.text = { tr::lng_group_call_no_anonymous(tr::now) },
 			});
 			return;
-		} else if (peer->groupCall()) {
+		} else */if (peer->groupCall()) {
 			controller()->startOrJoinGroupCall(peer);
 		}
 	}, _groupCallBar->lifetime());

Telegram/SourceFiles/mtproto/core_types.h

@@ -42,6 +42,7 @@ constexpr auto kLogoutDcShift = 0x02;
 constexpr auto kUpdaterDcShift = 0x03;
 constexpr auto kExportDcShift = 0x04;
 constexpr auto kExportMediaDcShift = 0x05;
+constexpr auto kGroupCallStreamDcShift = 0x06;
 constexpr auto kMaxMediaDcCount = 0x10;
 constexpr auto kBaseDownloadDcShift = 0x10;
 constexpr auto kBaseUploadDcShift = 0x20;

Telegram/SourceFiles/mtproto/facade.h

@@ -35,6 +35,11 @@ constexpr ShiftedDcId updaterDcId(DcId dcId) {
 	return ShiftDcId(dcId, kUpdaterDcShift);
 }
 
+// send(MTPupload_GetFile(), MTP::groupCallStreamDcId(dc)) - for gorup call stream
+constexpr ShiftedDcId groupCallStreamDcId(DcId dcId) {
+	return ShiftDcId(dcId, kGroupCallStreamDcShift);
+}
+
 constexpr auto kUploadSessionsCount = 2;
 
 namespace details {

Telegram/SourceFiles/window/window_session_controller.cpp

@@ -934,13 +934,13 @@ void SessionController::closeThirdSection() {
 void SessionController::startOrJoinGroupCall(
 		not_null<PeerData*> peer,
 		bool confirmedLeaveOther) {
-	const auto channel = peer->asChannel();
-	if (channel && channel->amAnonymous()) {
-		Ui::ShowMultilineToast({
-			.text = { tr::lng_group_call_no_anonymous(tr::now) },
-		});
-		return;
-	}
+	//const auto channel = peer->asChannel(); // #TODO calls
+	//if (channel && channel->amAnonymous()) {
+	//	Ui::ShowMultilineToast({
+	//		.text = { tr::lng_group_call_no_anonymous(tr::now) },
+	//	});
+	//	return;
+	//}
 	auto &calls = Core::App().calls();
 	const auto confirm = [&](QString text, QString button) {
 		Ui::show(Box<ConfirmBox>(text, button, crl::guard(this, [=] {