call.cpp

/*
 * call.cpp
 * Copyright (C) 2010-2018 Belledonne Communications SARL
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#include "c-wrapper/c-wrapper.h"
#include "call-p.h"
#include "chat/chat-room/real-time-text-chat-room-p.h"
#include "conference/params/media-session-params-p.h"
#include "conference/session/call-session-p.h"
#include "conference/session/media-session-p.h"
#include "core/core-p.h"
#include "logger/logger.h"

#include "conference_private.h"

// =============================================================================

using namespace std;

LINPHONE_BEGIN_NAMESPACE

bool CallPrivate::getAudioMuted () const {
	return static_pointer_cast<MediaSession>(getActiveSession())->getPrivate()->getAudioMuted();
}

shared_ptr<RealTimeTextChatRoom> CallPrivate::getChatRoom () {
	L_Q();
	if (!chatRoom && (q->getState() != CallSession::State::End) && (q->getState() != CallSession::State::Released)) {
		ChatRoomId chatRoomId(q->getRemoteAddress(), q->getLocalAddress());
		RealTimeTextChatRoom *rttcr = new RealTimeTextChatRoom(q->getCore(), chatRoomId);
		chatRoom.reset(rttcr);
		rttcr->getPrivate()->setCall(q->getSharedFromThis());
	}
	return chatRoom;
}

LinphoneProxyConfig *CallPrivate::getDestProxy () const {
	return getActiveSession()->getPrivate()->getDestProxy();
}

IceSession *CallPrivate::getIceSession () const {
	return static_pointer_cast<MediaSession>(getActiveSession())->getPrivate()->getIceSession();
}

unsigned int CallPrivate::getMediaStartCount () const {
	return static_pointer_cast<MediaSession>(getActiveSession())->getPrivate()->getMediaStartCount();
}

MediaStream *CallPrivate::getMediaStream (LinphoneStreamType type) const {
	return static_pointer_cast<MediaSession>(getActiveSession())->getPrivate()->getMediaStream(type);
}

SalCallOp * CallPrivate::getOp () const {
	return getActiveSession()->getPrivate()->getOp();
}

void CallPrivate::setAudioMuted (bool value) {
	static_pointer_cast<MediaSession>(getActiveSession())->getPrivate()->setAudioMuted(value);
}

LinphoneCallStats *CallPrivate::getStats (LinphoneStreamType type) const {
	return static_pointer_cast<const MediaSession>(getActiveSession())->getPrivate()->getStats(type);
}

// -----------------------------------------------------------------------------

void CallPrivate::initiateIncoming () {
	getActiveSession()->initiateIncoming();
}

bool CallPrivate::initiateOutgoing () {
	shared_ptr<CallSession> session = getActiveSession();
	bool defer = session->initiateOutgoing();
	session->getPrivate()->createOp();
	return defer;
}

void CallPrivate::iterate (time_t currentRealTime, bool oneSecondElapsed) {
	getActiveSession()->iterate(currentRealTime, oneSecondElapsed);
}

void CallPrivate::startIncomingNotification () {
	getActiveSession()->startIncomingNotification();
}

void CallPrivate::pauseForTransfer () {
	static_pointer_cast<MediaSession>(getActiveSession())->getPrivate()->pauseForTransfer();
}

int CallPrivate::startInvite (const Address *destination) {
	return getActiveSession()->startInvite(destination, "");
}

shared_ptr<Call> CallPrivate::startReferredCall (const MediaSessionParams *params) {
	L_Q();
	if (q->getState() != CallSession::State::Paused) {
		pauseForTransfer();
	}
	MediaSessionParams msp;
	if (params)
		msp = *params;
	else {
		msp.initDefault(q->getCore());
		msp.enableAudio(q->getCurrentParams()->audioEnabled());
		msp.enableVideo(q->getCurrentParams()->videoEnabled());
	}
	lInfo() << "Starting new call to referred address " << q->getReferTo();
	L_GET_PRIVATE(&msp)->setReferer(getActiveSession());
	L_GET_PRIVATE(getActiveSession())->setReferPending(false);
	LinphoneCallParams *lcp = L_GET_C_BACK_PTR(&msp);
	LinphoneCall *newCall = linphone_core_invite_with_params(q->getCore()->getCCore(), q->getReferTo().c_str(), lcp);
	linphone_call_params_unref(lcp);
	if (newCall) {
		getActiveSession()->getPrivate()->setTransferTarget(L_GET_PRIVATE_FROM_C_OBJECT(newCall)->getActiveSession());
		L_GET_PRIVATE_FROM_C_OBJECT(newCall)->getActiveSession()->getPrivate()->notifyReferState();
	}
	return L_GET_CPP_PTR_FROM_C_OBJECT(newCall);
}

// -----------------------------------------------------------------------------

void CallPrivate::createPlayer () const {
	L_Q();
	player = linphone_call_build_player(L_GET_C_BACK_PTR(q));
}

// -----------------------------------------------------------------------------

void CallPrivate::initializeMediaStreams () {
	static_pointer_cast<MediaSession>(getActiveSession())->getPrivate()->initializeStreams();
}

void CallPrivate::stopMediaStreams () {
	static_pointer_cast<MediaSession>(getActiveSession())->getPrivate()->stopStreams();
}

// -----------------------------------------------------------------------------

void CallPrivate::resetFirstVideoFrameDecoded () {
#ifdef VIDEO_ENABLED
	if (nextVideoFrameDecoded._func)
		static_pointer_cast<MediaSession>(getActiveSession())->resetFirstVideoFrameDecoded();
#endif // ifdef VIDEO_ENABLED
}

void CallPrivate::startRemoteRing () {
	L_Q();
	LinphoneCore *lc = q->getCore()->getCCore();
	if (!lc->sound_conf.play_sndcard)
		return;

	MSSndCard *ringCard = lc->sound_conf.lsd_card ? lc->sound_conf.lsd_card : lc->sound_conf.play_sndcard;
	int maxRate = static_pointer_cast<MediaSession>(getActiveSession())->getPrivate()->getLocalDesc()->streams[0].max_rate;
	if (maxRate > 0)
		ms_snd_card_set_preferred_sample_rate(ringCard, maxRate);
	// We release sound before playing ringback tone
	AudioStream *as = reinterpret_cast<AudioStream *>(getMediaStream(LinphoneStreamTypeAudio));
	if (as)
		audio_stream_unprepare_sound(as);
	if (lc->sound_conf.remote_ring) {
		lc->ringstream = ring_start(lc->factory, lc->sound_conf.remote_ring, 2000, ringCard);
	}
}

void CallPrivate::terminateBecauseOfLostMedia () {
	L_Q();
	lInfo() << "Call [" << q << "]: Media connectivity with " << q->getRemoteAddress().asString()
		<< " is lost, call is going to be terminated";
	static_pointer_cast<MediaSession>(getActiveSession())->terminateBecauseOfLostMedia();
	linphone_core_play_named_tone(q->getCore()->getCCore(), LinphoneToneCallLost);
}

// -----------------------------------------------------------------------------

void CallPrivate::onAckBeingSent (const shared_ptr<CallSession> &session, LinphoneHeaders *headers) {
	L_Q();
	linphone_call_notify_ack_processing(L_GET_C_BACK_PTR(q), headers, false);
}

void CallPrivate::onAckReceived (const shared_ptr<CallSession> &session, LinphoneHeaders *headers) {
	L_Q();
	linphone_call_notify_ack_processing(L_GET_C_BACK_PTR(q), headers, true);
}

void CallPrivate::onBackgroundTaskToBeStarted (const shared_ptr<CallSession> &session) {
	bgTask.start();
}

void CallPrivate::onBackgroundTaskToBeStopped (const shared_ptr<CallSession> &session) {
	bgTask.stop();
}

bool CallPrivate::onCallSessionAccepted (const shared_ptr<CallSession> &session) {
	L_Q();
	LinphoneCore *lc = q->getCore()->getCCore();
	bool wasRinging = false;

	if (q->getCore()->getCurrentCall() != q->getSharedFromThis())
		linphone_core_preempt_sound_resources(lc);

	// Stop ringing
	if (linphone_ringtoneplayer_is_started(lc->ringtoneplayer)) {
		lInfo() << "Stop ringing";
		linphone_core_stop_ringing(lc);
		wasRinging = true;
	}
	if (ringingBeep) {
		linphone_core_stop_dtmf(lc);
		ringingBeep = false;
	}
	return wasRinging;
}

void CallPrivate::onCallSessionConferenceStreamStarting (const shared_ptr<CallSession> &session, bool mute) {
	L_Q();
	if (q->getCore()->getCCore()->conf_ctx) {
		linphone_conference_on_call_stream_starting(q->getCore()->getCCore()->conf_ctx, L_GET_C_BACK_PTR(q), mute);
	}
}

void CallPrivate::onCallSessionConferenceStreamStopping (const shared_ptr<CallSession> &session) {
	L_Q();
	LinphoneCore *lc = q->getCore()->getCCore();
	if (lc->conf_ctx && _linphone_call_get_endpoint(L_GET_C_BACK_PTR(q)))
		linphone_conference_on_call_stream_stopping(lc->conf_ctx, L_GET_C_BACK_PTR(q));
}

void CallPrivate::onCallSessionEarlyFailed (const shared_ptr<CallSession> &session, LinphoneErrorInfo *ei) {
	L_Q();
	LinphoneCallLog *log = session->getLog();
	linphone_core_report_early_failed_call(q->getCore()->getCCore(),
		linphone_call_log_get_dir(log),
		linphone_address_clone(linphone_call_log_get_from(log)),
		linphone_address_clone(linphone_call_log_get_to(log)),
		ei);
	linphone_call_unref(L_GET_C_BACK_PTR(q));
}

void CallPrivate::onCallSessionSetReleased (const shared_ptr<CallSession> &session) {
	L_Q();
	linphone_call_unref(L_GET_C_BACK_PTR(q));
}

void CallPrivate::onCallSessionSetTerminated (const shared_ptr<CallSession> &session) {
	L_Q();
	LinphoneCore *core = q->getCore()->getCCore();
	if (q->getSharedFromThis() == q->getCore()->getCurrentCall()) {
		lInfo() << "Resetting the current call";
		q->getCore()->getPrivate()->setCurrentCall(nullptr);
	}
	if (q->getCore()->getPrivate()->removeCall(q->getSharedFromThis()) != 0)
		lError() << "Could not remove the call from the list!!!";
	if (core->conf_ctx)
		linphone_conference_on_call_terminating(core->conf_ctx, L_GET_C_BACK_PTR(q));
	if (ringingBeep) {
		linphone_core_stop_dtmf(core);
		ringingBeep = false;
	}
#if 0
	if (lcall->chat_room)
		linphone_chat_room_set_call(lcall->chat_room, nullptr);
#endif // if 0
	if (!q->getCore()->getPrivate()->hasCalls())
		ms_bandwidth_controller_reset_state(core->bw_controller);
}

void CallPrivate::onCallSessionStartReferred (const shared_ptr<CallSession> &session) {
	startReferredCall(nullptr);
}

void CallPrivate::onCallSessionStateChanged (const shared_ptr<CallSession> &session, CallSession::State state, const string &message) {
	L_Q();
	switch(state){
		case CallSession::State::OutgoingInit:
		case CallSession::State::IncomingReceived:
			getPlatformHelpers(q->getCore()->getCCore())->acquireWifiLock();
			getPlatformHelpers(q->getCore()->getCCore())->acquireMcastLock();
			getPlatformHelpers(q->getCore()->getCCore())->acquireCpuLock();
			break;
		case CallSession::State::Released:
			getPlatformHelpers(q->getCore()->getCCore())->releaseWifiLock();
			getPlatformHelpers(q->getCore()->getCCore())->releaseMcastLock();
			getPlatformHelpers(q->getCore()->getCCore())->releaseCpuLock();
			break;
		default:
			break;
	}
	linphone_call_notify_state_changed(L_GET_C_BACK_PTR(q), static_cast<LinphoneCallState>(state), message.c_str());
}

void CallPrivate::onCallSessionTransferStateChanged (const shared_ptr<CallSession> &session, CallSession::State state) {
	L_Q();
	linphone_call_notify_transfer_state_changed(L_GET_C_BACK_PTR(q), static_cast<LinphoneCallState>(state));
}

void CallPrivate::onCheckForAcceptation (const shared_ptr<CallSession> &session) {
	L_Q();
	LinphoneCall *lcall = L_GET_C_BACK_PTR(q);
	bctbx_list_t *copy = bctbx_list_copy(linphone_core_get_calls(q->getCore()->getCCore()));
	for (bctbx_list_t *it = copy; it != nullptr; it = bctbx_list_next(it)) {
		LinphoneCall *call = reinterpret_cast<LinphoneCall *>(bctbx_list_get_data(it));
		if (call == lcall) continue;
		switch (L_GET_CPP_PTR_FROM_C_OBJECT(call)->getState()) {
			case CallSession::State::OutgoingInit:
			case CallSession::State::OutgoingProgress:
			case CallSession::State::OutgoingRinging:
			case CallSession::State::OutgoingEarlyMedia:
				lInfo() << "Already existing call [" << call << "] in state [" << linphone_call_state_to_string(linphone_call_get_state(call)) <<
					"], canceling it before accepting new call [" << lcall << "]";
				linphone_call_terminate(call);
				break;
			default:
				break; /* Nothing to do */
		}
	}
	bctbx_list_free(copy);
}

void CallPrivate::onDtmfReceived (const shared_ptr<CallSession> &session, char dtmf) {
	L_Q();
	linphone_call_notify_dtmf_received(L_GET_C_BACK_PTR(q), dtmf);
}

void CallPrivate::onIncomingCallSessionNotified (const shared_ptr<CallSession> &session) {
	L_Q();
	/* The call is acceptable so we can now add it to our list */
	q->getCore()->getPrivate()->addCall(q->getSharedFromThis());
}

void CallPrivate::onIncomingCallSessionStarted (const shared_ptr<CallSession> &session) {
	L_Q();
	linphone_core_notify_incoming_call(q->getCore()->getCCore(), L_GET_C_BACK_PTR(q));
}

void CallPrivate::onIncomingCallSessionTimeoutCheck (const shared_ptr<CallSession> &session, int elapsed, bool oneSecondElapsed) {
	L_Q();
	if (oneSecondElapsed)
		lInfo() << "Incoming call ringing for " << elapsed << " seconds";
	if (elapsed > q->getCore()->getCCore()->sip_conf.inc_timeout) {
		lInfo() << "Incoming call timeout (" << q->getCore()->getCCore()->sip_conf.inc_timeout << ")";
		LinphoneReason declineReason = (q->getCore()->getCurrentCall() != q->getSharedFromThis())
			? LinphoneReasonBusy : LinphoneReasonDeclined;
		getActiveSession()->declineNotAnswered(declineReason);
	}
}

void CallPrivate::onInfoReceived (const shared_ptr<CallSession> &session, const LinphoneInfoMessage *im) {
	L_Q();
	linphone_call_notify_info_message_received(L_GET_C_BACK_PTR(q), im);
}

void CallPrivate::onNoMediaTimeoutCheck (const shared_ptr<CallSession> &session, bool oneSecondElapsed) {
	L_Q();
	int disconnectTimeout = linphone_core_get_nortp_timeout(q->getCore()->getCCore());
	bool disconnected = false;
	AudioStream *as = reinterpret_cast<AudioStream *>(getMediaStream(LinphoneStreamTypeAudio));
	if (((q->getState() == CallSession::State::StreamsRunning) || (q->getState() == CallSession::State::PausedByRemote))
		&& oneSecondElapsed && as && (as->ms.state == MSStreamStarted) && (disconnectTimeout > 0))
		disconnected = !audio_stream_alive(as, disconnectTimeout);
	if (disconnected)
		terminateBecauseOfLostMedia();
}

void CallPrivate::onEncryptionChanged (const shared_ptr<CallSession> &session, bool activated, const string &authToken) {
	L_Q();
	linphone_call_notify_encryption_changed(L_GET_C_BACK_PTR(q), activated, authToken.empty() ? nullptr : authToken.c_str());
}

void CallPrivate::onCallSessionStateChangedForReporting (const shared_ptr<CallSession> &session) {
	L_Q();
	linphone_reporting_call_state_updated(L_GET_C_BACK_PTR(q));
}

void CallPrivate::onRtcpUpdateForReporting (const shared_ptr<CallSession> &session, SalStreamType type) {
	L_Q();
	linphone_reporting_on_rtcp_update(L_GET_C_BACK_PTR(q), type);
}

void CallPrivate::onStatsUpdated (const shared_ptr<CallSession> &session, const LinphoneCallStats *stats) {
	L_Q();
	linphone_call_notify_stats_updated(L_GET_C_BACK_PTR(q), stats);
}

void CallPrivate::onUpdateMediaInfoForReporting (const shared_ptr<CallSession> &session, int statsType) {
	L_Q();
	linphone_reporting_update_media_info(L_GET_C_BACK_PTR(q), statsType);
}

void CallPrivate::onResetCurrentSession (const shared_ptr<CallSession> &session) {
	L_Q();
	q->getCore()->getPrivate()->setCurrentCall(nullptr);
}

void CallPrivate::onSetCurrentSession (const shared_ptr<CallSession> &session) {
	L_Q();
	q->getCore()->getPrivate()->setCurrentCall(q->getSharedFromThis());
}

void CallPrivate::onFirstVideoFrameDecoded (const shared_ptr<CallSession> &session) {
	L_Q();
	if (nextVideoFrameDecoded._func) {
		nextVideoFrameDecoded._func(L_GET_C_BACK_PTR(q), nextVideoFrameDecoded._user_data);
		nextVideoFrameDecoded._func = nullptr;
		nextVideoFrameDecoded._user_data = nullptr;
	}
}

void CallPrivate::onResetFirstVideoFrameDecoded (const shared_ptr<CallSession> &session) {
	resetFirstVideoFrameDecoded();
}

void CallPrivate::onPlayErrorTone (const shared_ptr<CallSession> &session, LinphoneReason reason) {
	L_Q();
	linphone_core_play_call_error_tone(q->getCore()->getCCore(), reason);
}

void CallPrivate::onRingbackToneRequested (const shared_ptr<CallSession> &session, bool requested) {
	L_Q();
	if (requested && linphone_core_get_remote_ringback_tone(q->getCore()->getCCore()))
		playingRingbackTone = true;
	else if (!requested)
		playingRingbackTone = false;
}

void CallPrivate::onStartRinging (const shared_ptr<CallSession> &session) {
	L_Q();
	LinphoneCore *lc = q->getCore()->getCCore();
	if (lc->ringstream)
		return; // Already ringing!
	startRemoteRing();
}

void CallPrivate::onStopRinging (const shared_ptr<CallSession> &session) {
	L_Q();
	linphone_core_stop_ringing(q->getCore()->getCCore());
}

void CallPrivate::onStopRingingIfInCall (const shared_ptr<CallSession> &session) {
	L_Q();
	LinphoneCore *lc = q->getCore()->getCCore();
	// We stop the ring only if we have this current call or if we are in call
	if ((q->getCore()->getCallCount() == 1) || linphone_core_in_call(lc)) {
		linphone_core_stop_ringing(lc);
	}
}

void CallPrivate::onStopRingingIfNeeded (const shared_ptr<CallSession> &session) {
	L_Q();
	LinphoneCore *lc = q->getCore()->getCCore();
	bool stopRinging = true;
	bool ringDuringEarlyMedia = linphone_core_get_ring_during_incoming_early_media(lc);
	for (const auto &call : q->getCore()->getCalls()) {
		if ((call->getState() == CallSession::State::IncomingReceived)
			|| (ringDuringEarlyMedia && call->getState() == CallSession::State::IncomingEarlyMedia)) {
			stopRinging = false;
			break;
		}
	}
	if (stopRinging)
		linphone_core_stop_ringing(lc);
}

bool CallPrivate::areSoundResourcesAvailable (const shared_ptr<CallSession> &session) {
	L_Q();
	LinphoneCore *lc = q->getCore()->getCCore();
	shared_ptr<Call> currentCall = q->getCore()->getCurrentCall();
	return !linphone_core_is_in_conference(lc) && (!currentCall || (currentCall == q->getSharedFromThis()));
}

bool CallPrivate::isPlayingRingbackTone (const shared_ptr<CallSession> &session) {
	return playingRingbackTone;
}

void CallPrivate::onRealTimeTextCharacterReceived (const shared_ptr<CallSession> &session, RealtimeTextReceivedCharacter *data) {
	L_Q();
	getChatRoom()->getPrivate()->realtimeTextReceived(data->character, q->getSharedFromThis());
}

// =============================================================================

Call::Call (CallPrivate &p, shared_ptr<Core> core) : Object(p), CoreAccessor(core) {
	L_D();
	d->nextVideoFrameDecoded._func = nullptr;
	d->nextVideoFrameDecoded._user_data = nullptr;

	d->bgTask.setName("Liblinphone call notification");
}

// -----------------------------------------------------------------------------

LinphoneStatus Call::accept (const MediaSessionParams *msp) {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->accept(msp);
}

LinphoneStatus Call::acceptEarlyMedia (const MediaSessionParams *msp) {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->acceptEarlyMedia(msp);
}

LinphoneStatus Call::acceptUpdate (const MediaSessionParams *msp) {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->acceptUpdate(msp);
}

void Call::cancelDtmfs () {
	L_D();
	static_pointer_cast<MediaSession>(d->getActiveSession())->cancelDtmfs();
}

LinphoneStatus Call::decline (LinphoneReason reason) {
	L_D();
	return d->getActiveSession()->decline(reason);
}

LinphoneStatus Call::decline (const LinphoneErrorInfo *ei) {
	L_D();
	return d->getActiveSession()->decline(ei);
}

LinphoneStatus Call::deferUpdate () {
	L_D();
	return d->getActiveSession()->deferUpdate();
}

bool Call::hasTransferPending () const {
	L_D();
	return d->getActiveSession()->hasTransferPending();
}

void Call::oglRender () const {
	L_D();
	static_pointer_cast<MediaSession>(d->getActiveSession())->getPrivate()->oglRender();
}

LinphoneStatus Call::pause () {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->pause();
}

LinphoneStatus Call::redirect (const string &redirectUri) {
	L_D();
	return d->getActiveSession()->redirect(redirectUri);
}

LinphoneStatus Call::resume () {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->resume();
}

LinphoneStatus Call::sendDtmf (char dtmf) {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->sendDtmf(dtmf);
}

LinphoneStatus Call::sendDtmfs (const string &dtmfs) {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->sendDtmfs(dtmfs);
}

void Call::sendVfuRequest () {
	L_D();
	static_pointer_cast<MediaSession>(d->getActiveSession())->sendVfuRequest();
}

void Call::startRecording () {
	L_D();
	static_pointer_cast<MediaSession>(d->getActiveSession())->startRecording();
}

void Call::stopRecording () {
	L_D();
	static_pointer_cast<MediaSession>(d->getActiveSession())->stopRecording();
}

LinphoneStatus Call::takePreviewSnapshot (const string &file) {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->takePreviewSnapshot(file);
}

LinphoneStatus Call::takeVideoSnapshot (const string &file) {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->takeVideoSnapshot(file);
}

LinphoneStatus Call::terminate (const LinphoneErrorInfo *ei) {
	L_D();
	return d->getActiveSession()->terminate(ei);
}

LinphoneStatus Call::transfer (const shared_ptr<Call> &dest) {
	L_D();
	return d->getActiveSession()->transfer(dest->getPrivate()->getActiveSession());
}

LinphoneStatus Call::transfer (const string &dest) {
	L_D();
	return d->getActiveSession()->transfer(dest);
}

LinphoneStatus Call::update (const MediaSessionParams *msp) {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->update(msp);
}

void Call::zoomVideo (float zoomFactor, float *cx, float *cy) {
	zoomVideo(zoomFactor, *cx, *cy);
}

void Call::zoomVideo (float zoomFactor, float cx, float cy) {
	L_D();
	static_pointer_cast<MediaSession>(d->getActiveSession())->zoomVideo(zoomFactor, cx, cy);
}

// -----------------------------------------------------------------------------

bool Call::cameraEnabled () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->cameraEnabled();
}

bool Call::echoCancellationEnabled () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->echoCancellationEnabled();
}

bool Call::echoLimiterEnabled () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->echoLimiterEnabled();
}

void Call::enableCamera (bool value) {
	L_D();
	static_pointer_cast<MediaSession>(d->getActiveSession())->enableCamera(value);
}

void Call::enableEchoCancellation (bool value) {
	L_D();
	static_pointer_cast<MediaSession>(d->getActiveSession())->enableEchoCancellation(value);
}

void Call::enableEchoLimiter (bool value) {
	L_D();
	static_pointer_cast<MediaSession>(d->getActiveSession())->enableEchoLimiter(value);
}

bool Call::getAllMuted () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getAllMuted();
}

LinphoneCallStats *Call::getAudioStats () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getAudioStats();
}

string Call::getAuthenticationToken () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getAuthenticationToken();
}

bool Call::getAuthenticationTokenVerified () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getAuthenticationTokenVerified();
}

float Call::getAverageQuality () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getAverageQuality();
}

const MediaSessionParams *Call::getCurrentParams () const {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->getCurrentParams();
}

float Call::getCurrentQuality () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getCurrentQuality();
}

LinphoneCallDir Call::getDirection () const {
	L_D();
	return d->getActiveSession()->getDirection();
}

const Address &Call::getDiversionAddress () const {
	L_D();
	return d->getActiveSession()->getDiversionAddress();
}

int Call::getDuration () const {
	L_D();
	return d->getActiveSession()->getDuration();
}

const LinphoneErrorInfo *Call::getErrorInfo () const {
	L_D();
	return d->getActiveSession()->getErrorInfo();
}

const Address &Call::getLocalAddress () const {
	L_D();
	return d->getActiveSession()->getLocalAddress();
}

LinphoneCallLog *Call::getLog () const {
	L_D();
	return d->getActiveSession()->getLog();
}

RtpTransport *Call::getMetaRtcpTransport (int streamIndex) const {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->getMetaRtcpTransport(streamIndex);
}

RtpTransport *Call::getMetaRtpTransport (int streamIndex) const {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->getMetaRtpTransport(streamIndex);
}

float Call::getMicrophoneVolumeGain () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getMicrophoneVolumeGain();
}

void *Call::getNativeVideoWindowId () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getNativeVideoWindowId();
}

const MediaSessionParams *Call::getParams () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getMediaParams();
}

LinphonePlayer *Call::getPlayer () const {
	L_D();
	if (!d->player)
		d->createPlayer();
	return d->player;
}

float Call::getPlayVolume () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getPlayVolume();
}

LinphoneReason Call::getReason () const {
	L_D();
	return d->getActiveSession()->getReason();
}

float Call::getRecordVolume () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getRecordVolume();
}

shared_ptr<Call> Call::getReferer () const {
	L_D();
	shared_ptr<CallSession> referer = d->getActiveSession()->getReferer();
	if (!referer)
		return nullptr;
	for (const auto &call : getCore()->getCalls()) {
		if (call->getPrivate()->getActiveSession() == referer)
			return call;
	}
	return nullptr;
}

string Call::getReferTo () const {
	L_D();
	return d->getActiveSession()->getReferTo();
}

const Address &Call::getRemoteAddress () const {
	L_D();
	return d->getActiveSession()->getRemoteAddress();
}

string Call::getRemoteContact () const {
	L_D();
	return d->getActiveSession()->getRemoteContact();
}

const MediaSessionParams *Call::getRemoteParams () const {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->getRemoteParams();
}

string Call::getRemoteUserAgent () const {
	L_D();
	return d->getActiveSession()->getRemoteUserAgent();
}

shared_ptr<Call> Call::getReplacedCall () const {
	L_D();
	shared_ptr<CallSession> replacedCallSession = d->getActiveSession()->getReplacedCallSession();
	if (!replacedCallSession)
		return nullptr;
	for (const auto &call : getCore()->getCalls()) {
		if (call->getPrivate()->getActiveSession() == replacedCallSession)
			return call;
	}
	return nullptr;
}

float Call::getSpeakerVolumeGain () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getSpeakerVolumeGain();
}

CallSession::State Call::getState () const {
	L_D();
	return d->getActiveSession()->getState();
}

LinphoneCallStats *Call::getStats (LinphoneStreamType type) const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getStats(type);
}

int Call::getStreamCount () const {
	L_D();
	return static_pointer_cast<MediaSession>(d->getActiveSession())->getStreamCount();
}

MSFormatType Call::getStreamType (int streamIndex) const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getStreamType(streamIndex);
}

LinphoneCallStats *Call::getTextStats () const {
	L_D();
	return static_pointer_cast<const MediaSession>(d->getActiveSession())->getTextStats();
}

const Address &Call::getToAddress () const {
	L_D();
	return d->getActiveSession()->getToAddress();
}

string Call::getToHeader (const string &name) const {
	L_D();
	return d->getActiveSession()->getToHeader(name);