Added broadcast mode for scheduled conferences

app/src/main/java/org/linphone/activities/main/chat/data/ChatMessageContentData.kt

@@ -63,6 +63,8 @@ class ChatMessageContentData(
     val isConferenceSchedule = MutableLiveData<Boolean>()
     val isConferenceUpdated = MutableLiveData<Boolean>()
     val isConferenceCancelled = MutableLiveData<Boolean>()
+    val isBroadcast = MutableLiveData<Boolean>()
+    val isSpeaker = MutableLiveData<Boolean>()
 
     val fileName = MutableLiveData<String>()
     val filePath = MutableLiveData<String>()
@@ -378,14 +380,26 @@ class ChatMessageContentData(
             var participantsCount = conferenceInfo.participants.size
             val organizer = conferenceInfo.organizer
             var organizerFound = false
-            if (organizer != null) {
+            var allSpeaker = true
-                for (participant in conferenceInfo.participants) {
+            isSpeaker.value = true
+            for (info in conferenceInfo.participantInfos) {
+                val participant = info.address
+                if (participant.weakEqual(chatMessage.chatRoom.localAddress)) {
+                    isSpeaker.value = info.role == Participant.Role.Speaker
+                }
+
+                if (info.role == Participant.Role.Listener) {
+                    allSpeaker = false
+                }
+
+                if (organizer != null) {
                     if (participant.weakEqual(organizer)) {
                         organizerFound = true
-                        break
                     }
                 }
             }
+            isBroadcast.value = allSpeaker == false
+
             if (!organizerFound) participantsCount += 1 // +1 for organizer
             conferenceParticipantCount.value = String.format(
                 AppUtils.getString(R.string.conference_invite_participants_count),

app/src/main/java/org/linphone/activities/main/conference/data/ConferenceSchedulingParticipantData.kt

@@ -19,15 +19,35 @@
  */
 package org.linphone.activities.main.conference.data
 
+import androidx.lifecycle.MutableLiveData
 import org.linphone.contact.GenericContactData
 import org.linphone.core.Address
 import org.linphone.utils.LinphoneUtils
 
 class ConferenceSchedulingParticipantData(
-    private val sipAddress: Address,
+    val sipAddress: Address,
     val showLimeBadge: Boolean = false,
-    val showDivider: Boolean = true
+    val showDivider: Boolean = true,
+    val showBroadcastControls: Boolean = false,
+    val speaker: Boolean = false,
+    private val onAddedToSpeakers: ((data: ConferenceSchedulingParticipantData) -> Unit)? = null,
+    private val onRemovedFromSpeakers: ((data: ConferenceSchedulingParticipantData) -> Unit)? = null
 ) :
     GenericContactData(sipAddress) {
+    val isSpeaker = MutableLiveData<Boolean>()
+
     val sipUri: String get() = LinphoneUtils.getDisplayableAddress(sipAddress)
+
+    init {
+        isSpeaker.value = speaker
+    }
+
+    fun changeIsSpeaker() {
+        isSpeaker.value = isSpeaker.value == false
+        if (isSpeaker.value == true) {
+            onAddedToSpeakers?.invoke(this)
+        } else {
+            onRemovedFromSpeakers?.invoke(this)
+        }
+    }
 }

app/src/main/java/org/linphone/activities/main/conference/data/ScheduledConferenceData.kt

@@ -25,6 +25,7 @@ import org.linphone.LinphoneApplication.Companion.coreContext
 import org.linphone.R
 import org.linphone.core.ConferenceInfo
 import org.linphone.core.ConferenceInfo.State
+import org.linphone.core.Participant
 import org.linphone.core.tools.Log
 import org.linphone.utils.LinphoneUtils
 import org.linphone.utils.TimestampUtils
@@ -45,9 +46,12 @@ class ScheduledConferenceData(val conferenceInfo: ConferenceInfo, private val is
     val participantsExpanded = MutableLiveData<String>()
     val showDuration = MutableLiveData<Boolean>()
     val isConferenceCancelled = MutableLiveData<Boolean>()
+    val isBroadcast = MutableLiveData<Boolean>()
+    val speakersExpanded = MutableLiveData<String>()
 
     init {
         expanded.value = false
+        isBroadcast.value = false
 
         address.value = conferenceInfo.uri?.asStringUriOnly()
         subject.value = conferenceInfo.subject
@@ -141,24 +145,48 @@ class ScheduledConferenceData(val conferenceInfo: ConferenceInfo, private val is
     private fun computeParticipantsLists() {
         var participantsListShort = ""
         var participantsListExpanded = ""
+        var speakersListExpanded = ""
+
+        var allSpeaker = true
+        for (info in conferenceInfo.participantInfos) {
+            val participant = info.address
+            Log.i(
+                "[Scheduled Conference] Conference [${subject.value}] participant [${participant.asStringUriOnly()}] is a [${info.role}]"
+            )
 
-        for (participant in conferenceInfo.participants) {
             val contact = coreContext.contactsManager.findContactByAddress(participant)
             val name = if (contact != null) {
                 contact.name
             } else {
-                LinphoneUtils.getDisplayName(
+                LinphoneUtils.getDisplayName(participant)
-                    participant
-                )
             }
             val address = participant.asStringUriOnly()
             participantsListShort += "$name, "
-            participantsListExpanded += "$name ($address)\n"
+            when (info.role) {
+                Participant.Role.Speaker -> {
+                    speakersListExpanded += "$name ($address)\n"
+                }
+                Participant.Role.Listener -> {
+                    participantsListExpanded += "$name ($address)\n"
+                    allSpeaker = false
+                }
+                else -> { // For meetings created before 5.3 SDK
+                    participantsListExpanded += "$name ($address)\n"
+                }
+            }
         }
         participantsListShort = participantsListShort.dropLast(2)
         participantsListExpanded = participantsListExpanded.dropLast(1)
+        speakersListExpanded = speakersListExpanded.dropLast(1)
 
         participantsShort.value = participantsListShort
         participantsExpanded.value = participantsListExpanded
+        speakersExpanded.value = speakersListExpanded
+
+        // If all participants have Speaker role then it is a meeting, else it is a broadcast
+        isBroadcast.value = allSpeaker == false
+        Log.i(
+            "[Scheduled Conference] Conference [${subject.value}] is a ${if (allSpeaker) "meeting" else "broadcast"}"
+        )
     }
 }

app/src/main/java/org/linphone/activities/main/conference/fragments/ConferenceWaitingRoomFragment.kt

@@ -53,6 +53,9 @@ class ConferenceWaitingRoomFragment : GenericFragment<ConferenceWaitingRoomFragm
         val conferenceSubject = arguments?.getString("Subject")
         viewModel.subject.value = conferenceSubject
 
+        val address = arguments?.getString("Address")
+        viewModel.findConferenceInfoByAddress(address)
+
         viewModel.cancelConferenceJoiningEvent.observe(
             viewLifecycleOwner
         ) {

app/src/main/java/org/linphone/activities/main/conference/viewmodels/ConferenceSchedulingViewModel.kt

@@ -23,6 +23,7 @@ import androidx.lifecycle.MediatorLiveData
 import androidx.lifecycle.MutableLiveData
 import java.util.*
 import org.linphone.LinphoneApplication.Companion.coreContext
+import org.linphone.LinphoneApplication.Companion.corePreferences
 import org.linphone.R
 import org.linphone.activities.main.conference.data.ConferenceSchedulingParticipantData
 import org.linphone.activities.main.conference.data.Duration
@@ -30,6 +31,7 @@ import org.linphone.activities.main.conference.data.TimeZoneData
 import org.linphone.contact.ContactsSelectionViewModel
 import org.linphone.core.*
 import org.linphone.core.tools.Log
+import org.linphone.utils.AppUtils
 import org.linphone.utils.Event
 import org.linphone.utils.LinphoneUtils
 import org.linphone.utils.TimestampUtils
@@ -41,6 +43,10 @@ class ConferenceSchedulingViewModel : ContactsSelectionViewModel() {
     val scheduleForLater = MutableLiveData<Boolean>()
     val isUpdate = MutableLiveData<Boolean>()
 
+    val isBroadcastAllowed = MutableLiveData<Boolean>()
+    val mode = MutableLiveData<String>()
+    val modesList: List<String>
+
     val formattedDate = MutableLiveData<String>()
     val formattedTime = MutableLiveData<String>()
 
@@ -50,6 +56,7 @@ class ConferenceSchedulingViewModel : ContactsSelectionViewModel() {
     val sendInviteViaEmail = MutableLiveData<Boolean>()
 
     val participantsData = MutableLiveData<List<ConferenceSchedulingParticipantData>>()
+    val speakersData = MutableLiveData<List<ConferenceSchedulingParticipantData>>()
 
     val address = MutableLiveData<Address>()
 
@@ -74,6 +81,8 @@ class ConferenceSchedulingViewModel : ContactsSelectionViewModel() {
     private var confInfo: ConferenceInfo? = null
     private val conferenceScheduler = coreContext.core.createConferenceScheduler()
 
+    private val selectedSpeakersAddresses = MutableLiveData<ArrayList<Address>>()
+
     private val listener = object : ConferenceSchedulerListenerStub() {
         override fun onStateChanged(
             conferenceScheduler: ConferenceScheduler,
@@ -154,6 +163,13 @@ class ConferenceSchedulingViewModel : ContactsSelectionViewModel() {
         scheduleForLater.value = false
         isUpdate.value = false
 
+        isBroadcastAllowed.value = !corePreferences.disableBroadcastConference
+        modesList = arrayListOf(
+            AppUtils.getString(R.string.conference_schedule_mode_meeting),
+            AppUtils.getString(R.string.conference_schedule_mode_broadcast)
+        )
+        mode.value = modesList.first() // Meeting by default
+
         isEncrypted.value = false
         sendInviteViaChat.value = true
         sendInviteViaEmail.value = false
@@ -185,6 +201,7 @@ class ConferenceSchedulingViewModel : ContactsSelectionViewModel() {
     override fun onCleared() {
         conferenceScheduler.removeListener(listener)
         participantsData.value.orEmpty().forEach(ConferenceSchedulingParticipantData::destroy)
+        speakersData.value.orEmpty().forEach(ConferenceSchedulingParticipantData::destroy)
 
         super.onCleared()
     }
@@ -195,6 +212,7 @@ class ConferenceSchedulingViewModel : ContactsSelectionViewModel() {
     }
 
     fun populateFromConferenceInfo(conferenceInfo: ConferenceInfo) {
+        // Pre-set data from existing conference info, used when editing an already scheduled broadcast or meeting
         confInfo = conferenceInfo
 
         address.value = conferenceInfo.uri
@@ -213,10 +231,26 @@ class ConferenceSchedulingViewModel : ContactsSelectionViewModel() {
         scheduleForLater.value = conferenceDuration > 0
 
         val participantsList = arrayListOf<Address>()
-        for (participant in conferenceInfo.participants) {
+        val speakersList = arrayListOf<Address>()
+        for (info in conferenceInfo.participantInfos) {
+            val participant = info.address
             participantsList.add(participant)
+            if (info.role == Participant.Role.Speaker) {
+                speakersList.add(participant)
+            }
+        }
+        if (participantsList.count() == speakersList.count()) {
+            // All participants are speaker, this is a meeting, clear speakers
+            Log.i("[Conference Creation] Conference info is a meeting")
+            speakersList.clear()
+            mode.value = modesList.first()
+        } else {
+            Log.i("[Conference Creation] Conference info is a broadcast")
+            mode.value = modesList.last()
         }
         selectedAddresses.value = participantsList
+        selectedSpeakersAddresses.value = speakersList
+
         computeParticipantsData()
     }
 
@@ -241,14 +275,57 @@ class ConferenceSchedulingViewModel : ContactsSelectionViewModel() {
 
     fun computeParticipantsData() {
         participantsData.value.orEmpty().forEach(ConferenceSchedulingParticipantData::destroy)
-        val list = arrayListOf<ConferenceSchedulingParticipantData>()
+        speakersData.value.orEmpty().forEach(ConferenceSchedulingParticipantData::destroy)
+
+        val participantsList = arrayListOf<ConferenceSchedulingParticipantData>()
+        val speakersList = arrayListOf<ConferenceSchedulingParticipantData>()
 
         for (address in selectedAddresses.value.orEmpty()) {
-            val data = ConferenceSchedulingParticipantData(address, isEncrypted.value == true)
+            val isSpeaker = address in selectedSpeakersAddresses.value.orEmpty()
-            list.add(data)
+            val data = ConferenceSchedulingParticipantData(
+                address,
+                showLimeBadge = isEncrypted.value == true,
+                showBroadcastControls = isModeBroadcastCurrentlySelected(),
+                speaker = isSpeaker,
+                onAddedToSpeakers = { data ->
+                    Log.i(
+                        "[Conference Creation] Participant [${address.asStringUriOnly()}] added to speakers"
+                    )
+                    val participants = arrayListOf<ConferenceSchedulingParticipantData>()
+                    participants.addAll(participantsData.value.orEmpty())
+                    participants.remove(data)
+                    participantsData.value = participants
+
+                    val speakers = arrayListOf<ConferenceSchedulingParticipantData>()
+                    speakers.addAll(speakersData.value.orEmpty())
+                    speakers.add(data)
+                    speakersData.value = speakers
+                },
+                onRemovedFromSpeakers = { data ->
+                    Log.i(
+                        "[Conference Creation] Participant [${address.asStringUriOnly()}] removed from speakers"
+                    )
+                    val speakers = arrayListOf<ConferenceSchedulingParticipantData>()
+                    speakers.addAll(speakersData.value.orEmpty())
+                    speakers.remove(data)
+                    speakersData.value = speakers
+
+                    val participants = arrayListOf<ConferenceSchedulingParticipantData>()
+                    participants.addAll(participantsData.value.orEmpty())
+                    participants.add(data)
+                    participantsData.value = participants
+                }
+            )
+
+            if (isSpeaker) {
+                speakersList.add(data)
+            } else {
+                participantsList.add(data)
+            }
         }
 
-        participantsData.value = list
+        participantsData.value = participantsList
+        speakersData.value = speakersList
     }
 
     fun createConference() {
@@ -260,8 +337,6 @@ class ConferenceSchedulingViewModel : ContactsSelectionViewModel() {
 
         conferenceCreationInProgress.value = true
         val core = coreContext.core
-        val participants = arrayOfNulls<Address>(selectedAddresses.value.orEmpty().size)
-        selectedAddresses.value?.toArray(participants)
         val localAccount = core.defaultAccount
         val localAddress = localAccount?.params?.identityAddress
 
@@ -273,7 +348,25 @@ class ConferenceSchedulingViewModel : ContactsSelectionViewModel() {
         conferenceInfo.organizer = localAddress
         conferenceInfo.subject = subject.value
         conferenceInfo.description = description.value
-        conferenceInfo.setParticipants(participants)
+
+        val participants = arrayOfNulls<ParticipantInfo>(selectedAddresses.value.orEmpty().size)
+        var index = 0
+        val isBroadcast = isModeBroadcastCurrentlySelected()
+        for (participant in participantsData.value.orEmpty()) {
+            val info = Factory.instance().createParticipantInfo(participant.sipAddress)
+            // For meetings, all participants must have Speaker role
+            info?.role = if (isBroadcast) Participant.Role.Listener else Participant.Role.Speaker
+            participants[index] = info
+            index += 1
+        }
+        for (speaker in speakersData.value.orEmpty()) {
+            val info = Factory.instance().createParticipantInfo(speaker.sipAddress)
+            info?.role = Participant.Role.Speaker
+            participants[index] = info
+            index += 1
+        }
+        conferenceInfo.setParticipantInfos(participants)
+
         if (scheduleForLater.value == true) {
             val startTime = getConferenceStartTimestamp()
             conferenceInfo.dateTime = startTime
@@ -287,6 +380,10 @@ class ConferenceSchedulingViewModel : ContactsSelectionViewModel() {
         conferenceScheduler.info = conferenceInfo
     }
 
+    fun isModeBroadcastCurrentlySelected(): Boolean {
+        return mode.value == AppUtils.getString(R.string.conference_schedule_mode_broadcast)
+    }
+
     private fun computeTimeZonesList(): List<TimeZoneData> {
         return TimeZone.getAvailableIDs().map { id -> TimeZoneData(TimeZone.getTimeZone(id)) }.toList().sorted()
     }

app/src/main/java/org/linphone/activities/main/conference/viewmodels/ConferenceWaitingRoomViewModel.kt

@@ -61,6 +61,8 @@ class ConferenceWaitingRoomViewModel : MessageNotifierViewModel() {
 
     val networkReachable = MutableLiveData<Boolean>()
 
+    val isConferenceBroadcastWithListenerRole = MutableLiveData<Boolean>()
+
     val askPermissionEvent: MutableLiveData<Event<String>> by lazy {
         MutableLiveData<Event<String>>()
     }
@@ -198,7 +200,10 @@ class ConferenceWaitingRoomViewModel : MessageNotifierViewModel() {
         }
 
         layoutMenuSelected.value = false
-        updateLayout()
+        when (core.defaultConferenceLayout) {
+            Conference.Layout.Grid -> setMosaicLayout()
+            else -> setActiveSpeakerLayout()
+        }
 
         if (AudioRouteUtils.isBluetoothAudioRouteAvailable()) {
             setBluetoothAudioRoute()
@@ -216,6 +221,44 @@ class ConferenceWaitingRoomViewModel : MessageNotifierViewModel() {
         super.onCleared()
     }
 
+    fun findConferenceInfoByAddress(stringAddress: String?) {
+        if (stringAddress != null) {
+            val address = Factory.instance().createAddress(stringAddress)
+            if (address != null) {
+                val conferenceInfo = coreContext.core.findConferenceInformationFromUri(address)
+                if (conferenceInfo != null) {
+                    val myself = conferenceInfo.participantInfos.find {
+                        it.address.asStringUriOnly() == coreContext.core.defaultAccount?.params?.identityAddress?.asStringUriOnly()
+                    }
+                    if (myself != null) {
+                        Log.i(
+                            "[Conference Waiting Room] Found our participant, it's role is [${myself.role}]"
+                        )
+                        val areWeListener = myself.role == Participant.Role.Listener
+                        isConferenceBroadcastWithListenerRole.value = areWeListener
+
+                        if (areWeListener) {
+                            callParams.isVideoEnabled = false
+                            callParams.videoDirection = MediaDirection.Inactive
+                            updateVideoState()
+                            updateLayout()
+                        }
+                    } else {
+                        Log.e(
+                            "[Conference Waiting Room] Failed to find ourselves in participants info"
+                        )
+                    }
+                } else {
+                    Log.e(
+                        "[Conference Waiting Room] Failed to find conference info using address [$stringAddress]"
+                    )
+                }
+            }
+        } else {
+            Log.e("[Conference Waiting Room] Can't find conference info using null address!")
+        }
+    }
+
     fun cancel() {
         cancelConferenceJoiningEvent.value = Event(true)
     }

app/src/main/java/org/linphone/activities/main/settings/viewmodels/ConferencesSettingsViewModel.kt

@@ -35,8 +35,16 @@ class ConferencesSettingsViewModel : GenericSettingsViewModel() {
     val layoutLabels = MutableLiveData<ArrayList<String>>()
     private val layoutValues = arrayListOf<Int>()
 
+    val enableBroadcastListener = object : SettingListenerStub() {
+        override fun onBoolValueChanged(newValue: Boolean) {
+            prefs.disableBroadcastConference = !newValue
+        }
+    }
+    val enableBroadcast = MutableLiveData<Boolean>()
+
     init {
         initLayoutsList()
+        enableBroadcast.value = !prefs.disableBroadcastConference
     }
 
     private fun initLayoutsList() {

app/src/main/java/org/linphone/activities/voip/data/ConferenceParticipantData.kt

@@ -34,10 +34,13 @@ class ConferenceParticipantData(
 
     val isAdmin = MutableLiveData<Boolean>()
     val isMeAdmin = MutableLiveData<Boolean>()
+    val isSpeaker = MutableLiveData<Boolean>()
 
     init {
         isAdmin.value = participant.isAdmin
         isMeAdmin.value = conference.me.isAdmin
+        isSpeaker.value = participant.role == Participant.Role.Speaker
+
         Log.i(
             "[Conference Participant] Participant ${participant.address.asStringUriOnly()} is ${if (participant.isAdmin) "admin" else "not admin"}"
         )

app/src/main/java/org/linphone/activities/voip/viewmodels/ConferenceViewModel.kt

@@ -56,9 +56,13 @@ class ConferenceViewModel : ViewModel() {
     val twoOrMoreParticipants = MutableLiveData<Boolean>()
     val moreThanTwoParticipants = MutableLiveData<Boolean>()
 
+    val speakingParticipantFound = MutableLiveData<Boolean>()
     val speakingParticipant = MutableLiveData<ConferenceParticipantDeviceData>()
     val meParticipant = MutableLiveData<ConferenceParticipantDeviceData>()
 
+    val isBroadcast = MutableLiveData<Boolean>()
+    val isMeListenerOnly = MutableLiveData<Boolean>()
+
     val participantAdminStatusChangedEvent: MutableLiveData<Event<ConferenceParticipantData>> by lazy {
         MutableLiveData<Event<ConferenceParticipantData>>()
     }
@@ -207,6 +211,7 @@ class ConferenceViewModel : ViewModel() {
                 speakingParticipant.value?.isActiveSpeaker?.value = false
                 device.isActiveSpeaker.value = true
                 speakingParticipant.value = device!!
+                speakingParticipantFound.value = true
             } else if (device == null) {
                 Log.w(
                     "[Conference] Participant device [${participantDevice.address.asStringUriOnly()}] is the active speaker but couldn't find it in devices list"
@@ -528,6 +533,23 @@ class ConferenceViewModel : ViewModel() {
 
         val activelySpeakingParticipantDevice = conference.activeSpeakerParticipantDevice
         var foundActivelySpeakingParticipantDevice = false
+        speakingParticipantFound.value = false
+
+        val conferenceInfo = conference.core.findConferenceInformationFromUri(
+            conference.conferenceAddress
+        )
+        var allSpeaker = true
+        for (info in conferenceInfo?.participantInfos.orEmpty()) {
+            if (info.role == Participant.Role.Listener) {
+                allSpeaker = false
+            }
+        }
+        isBroadcast.value = !allSpeaker
+        if (!allSpeaker) {
+            Log.i(
+                "[Conference] Not all participants are speaker, considering it is a broadcast"
+            )
+        }
 
         for (participant in participantsList) {
             val participantDevices = participant.devices
@@ -539,6 +561,18 @@ class ConferenceViewModel : ViewModel() {
                 Log.i(
                     "[Conference] Participant device found: ${device.name} (${device.address.asStringUriOnly()})"
                 )
+
+                val info = conferenceInfo?.participantInfos?.find {
+                    it.address.weakEqual(participant.address)
+                }
+                if (info != null) {
+                    Log.i("[Conference] Participant role is [${info.role.name}]")
+                    val listener = info.role == Participant.Role.Listener || info.role == Participant.Role.Unknown
+                    if (listener) {
+                        continue
+                    }
+                }
+
                 val deviceData = ConferenceParticipantDeviceData(device, false)
                 devices.add(deviceData)
 
@@ -549,6 +583,7 @@ class ConferenceViewModel : ViewModel() {
                     speakingParticipant.value = deviceData
                     deviceData.isActiveSpeaker.value = true
                     foundActivelySpeakingParticipantDevice = true
+                    speakingParticipantFound.value = true
                 }
             }
         }
@@ -560,12 +595,26 @@ class ConferenceViewModel : ViewModel() {
             val deviceData = devices.first()
             speakingParticipant.value = deviceData
             deviceData.isActiveSpeaker.value = true
+            speakingParticipantFound.value = false
         }
 
         for (device in conference.me.devices) {
             Log.i(
                 "[Conference] Participant device for myself found: ${device.name} (${device.address.asStringUriOnly()})"
             )
+
+            val info = conferenceInfo?.participantInfos?.find {
+                it.address.weakEqual(device.address)
+            }
+            if (info != null) {
+                Log.i("[Conference] Me role is [${info.role.name}]")
+                val listener = info.role == Participant.Role.Listener || info.role == Participant.Role.Unknown
+                isMeListenerOnly.value = listener
+                if (listener) {
+                    continue
+                }
+            }
+
             val deviceData = ConferenceParticipantDeviceData(device, true)
             devices.add(deviceData)
             meParticipant.value = deviceData
@@ -601,6 +650,7 @@ class ConferenceViewModel : ViewModel() {
         if (speakingParticipant.value == null) {
             speakingParticipant.value = deviceData
             deviceData.isActiveSpeaker.value = true
+            speakingParticipantFound.value = false
         }
 
         conferenceParticipantDevices.value = sortedDevices
@@ -641,6 +691,7 @@ class ConferenceViewModel : ViewModel() {
             val deviceData = devices[1]
             speakingParticipant.value = deviceData
             deviceData.isActiveSpeaker.value = true
+            speakingParticipantFound.value = false
         }
 
         conferenceParticipantDevices.value = devices

app/src/main/java/org/linphone/core/CorePreferences.kt

@@ -377,6 +377,12 @@ class CorePreferences constructor(private val context: Context) {
             config.setBool("app", "enter_video_conference_enable_full_screen_mode", value)
         }
 
+    var disableBroadcastConference: Boolean
+        get() = config.getBool("app", "disable_broadcast_conference_feature", true)
+        set(value) {
+            config.setBool("app", "disable_broadcast_conference_feature", value)
+        }
+
     /* Assistant */
 
     var firstStart: Boolean

app/src/main/res/drawable/rect_orange_button.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:state_enabled="false"
+        android:drawable="@drawable/shape_rect_orange_disabled_button" />
+    <item android:state_pressed="true"
+        android:drawable="@drawable/shape_rect_green_button" />
+    <item
+        android:drawable="@drawable/shape_rect_orange_button" />
+</selector>

app/src/main/res/drawable/shape_rect_orange_disabled_button.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
+    <corners android:radius="5dp" />
+    <size android:height="20dp" android:width="20dp"/>
+    <solid android:color="@color/primary_color_disabled"/>
+</shape>

app/src/main/res/layout-land/voip_conference_active_speaker.xml

@@ -166,6 +166,7 @@
             android:id="@+id/active_speaker_background"
             android:layout_width="0dp"
             android:layout_height="0dp"
+            android:visibility="@{conferenceViewModel.speakingParticipantFound ? View.VISIBLE : View.GONE}"
             app:layout_constraintTop_toBottomOf="@id/top_barrier"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintEnd_toStartOf="@id/miniatures"
@@ -179,6 +180,7 @@
             android:layout_width="0dp"
             android:layout_height="0dp"
             android:contentDescription="@null"
+            android:visibility="@{conferenceViewModel.speakingParticipantFound ? View.VISIBLE : View.GONE}"
             coilVoipContact="@{conferenceViewModel.speakingParticipant}"
             android:background="@drawable/generated_avatar_bg"
             app:layout_constraintBottom_toBottomOf="@id/active_speaker_background"
@@ -196,7 +198,7 @@
             android:background="@drawable/shape_button_background"
             android:contentDescription="@string/content_description_participant_is_paused"
             android:src="@drawable/icon_pause"
-            android:visibility="@{conferenceViewModel.speakingParticipant.isInConference ? View.GONE : View.VISIBLE, default=gone}"
+            android:visibility="@{conferenceViewModel.speakingParticipantFound && conferenceViewModel.speakingParticipant.isInConference ? View.GONE : View.VISIBLE, default=gone}"
             app:layout_constraintDimensionRatio="1:1"
             app:layout_constraintBottom_toBottomOf="@id/active_speaker_background"
             app:layout_constraintEnd_toEndOf="@id/active_speaker_background"
@@ -253,6 +255,7 @@
             android:id="@+id/local_participant_background"
             android:layout_width="0dp"
             android:layout_height="0dp"
+            android:visibility="@{conferenceViewModel.isMeListenerOnly ? View.GONE : View.VISIBLE}"
             app:layout_constraintTop_toBottomOf="@id/top_barrier"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
@@ -267,6 +270,7 @@
             android:layout_height="0dp"
             android:layout_margin="10dp"
             android:contentDescription="@null"
+            android:visibility="@{conferenceViewModel.isMeListenerOnly ? View.GONE : View.VISIBLE}"
             coilSelfAvatar="@{conferenceViewModel.meParticipant}"
             android:background="@drawable/generated_avatar_bg"
             app:layout_constraintDimensionRatio="1:1"
@@ -297,6 +301,7 @@
             android:layout_marginStart="5dp"
             android:layout_marginEnd="5dp"
             android:layout_marginBottom="5dp"
+            android:visibility="@{conferenceViewModel.isMeListenerOnly ? View.GONE : View.VISIBLE}"
             android:text="@{conferenceViewModel.meParticipant.contact.name ?? conferenceViewModel.meParticipant.displayName}"
             app:layout_constraintBottom_toBottomOf="@id/local_participant_background"
             app:layout_constraintStart_toStartOf="@id/local_participant_background"

app/src/main/res/layout/chat_message_conference_invitation_content_cell.xml

@@ -30,7 +30,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             style="@style/conference_invite_title_font"
-            android:text="@string/conference_invite_title"
+            android:text="@{data.isBroadcast ? @string/conference_broadcast_invite_title : @string/conference_invite_title, default=@string/conference_invite_title}"
             android:visibility="@{data.isConferenceUpdated || data.isConferenceCancelled ? View.GONE : View.VISIBLE}"/>
 
         <TextView
@@ -67,6 +67,15 @@
             android:text="@{data.conferenceParticipantCount, default=`3 participants`}"
             app:drawableStartCompat="@drawable/icon_schedule_participants"/>
 
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="23dp"
+            android:layout_marginBottom="2dp"
+            android:visibility="@{data.isBroadcast &amp;&amp; data.isSpeaker ? View.VISIBLE : View.GONE}"
+            style="@style/conference_invite_dat_time_font"
+            android:text="@string/conference_broadcast_invite_you_are_speaker"/>
+
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"

app/src/main/res/layout/conference_schedule_cell.xml

@@ -109,7 +109,7 @@
             </RelativeLayout>
 
             <TextView
-                android:layout_width="match_parent"
+                android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_marginTop="5dp"
                 android:layout_marginStart="5dp"
@@ -118,15 +118,32 @@
                 android:visibility="@{data.isConferenceCancelled ? View.VISIBLE : View.GONE, default=gone}"
                 android:text="@{data.canEdit ? @string/conference_scheduled_cancelled_by_me : @string/conference_scheduled_cancelled_by_organizer, default=@string/conference_scheduled_cancelled_by_organizer}"/>
 
-            <TextView
+            <LinearLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_marginTop="5dp"
+                android:orientation="horizontal">
-                android:layout_marginStart="5dp"
+
-                android:layout_marginEnd="5dp"
+                <TextView
-                style="@style/conference_invite_subject_font"
+                    android:id="@+id/meeting_type"
-                android:maxLines="2"
+                    android:layout_width="wrap_content"
-                android:text="@{data.subject, default=`Lorem Ipsum`}"/>
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="5dp"
+                    android:layout_marginStart="5dp"
+                    android:layout_marginEnd="5dp"
+                    style="@style/conference_invite_subject_font"
+                    android:text="@{data.isBroadcast() ? @string/conference_broadcast_title : @string/conference_meeting_title, default=@string/conference_meeting_title}"/>
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="5dp"
+                    android:layout_marginStart="5dp"
+                    android:layout_marginEnd="5dp"
+                    style="@style/conference_invite_subject_font"
+                    android:maxLines="2"
+                    android:text="@{data.subject, default=`Lorem Ipsum`}"/>
+
+            </LinearLayout>
 
             <LinearLayout
                 android:visibility="@{data.expanded ? View.GONE : View.VISIBLE}"
@@ -182,24 +199,61 @@
                     android:contentDescription="@string/content_description_toggle_conference_info_details"
                     android:src="@drawable/button_conference_info" />
 
-                <ImageView
+                <TextView
-                    android:id="@+id/participants_icon"
+                    style="@style/conference_invite_desc_font"
+                    android:id="@+id/speakers_title"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_alignParentTop="true"
                     android:layout_alignParentStart="true"
-                    android:contentDescription="@string/content_description_conference_participants"
+                    android:text="@string/conference_invite_speakers_list_title"
+                    android:textSize="16sp"
+                    android:textColor="@color/voip_dark_gray"
+                    android:drawableStart="@drawable/icon_schedule_participants"
+                    android:drawablePadding="5dp"
+                    android:visibility="@{data.isConferenceCancelled || !data.isBroadcast ? View.GONE : View.VISIBLE}"
+                    android:src="@drawable/icon_schedule_participants"/>
+
+                <TextView
+                    android:id="@+id/speakers_list"
+                    style="@style/conference_invite_desc_font"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="23dp"
+                    android:layout_marginEnd="10dp"
+                    android:layout_marginBottom="10dp"
+                    android:layout_toStartOf="@id/selected_info"
+                    android:layout_below="@id/speakers_title"
+                    android:background="@color/transparent_color"
+                    android:drawablePadding="5dp"
+                    android:visibility="@{data.isConferenceCancelled || !data.isBroadcast ? View.GONE : View.VISIBLE}"
+                    android:text="@{data.speakersExpanded, default=`Daryl Martin\nMartin Pecheur`}"
+                    tools:ignore="LabelFor" />
+
+                <TextView
+                    style="@style/conference_invite_desc_font"
+                    android:id="@+id/participants_title"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_below="@id/speakers_list"
+                    android:layout_alignParentStart="true"
+                    android:text="@string/conference_invite_participants_list_title"
+                    android:textSize="16sp"
+                    android:textColor="@color/voip_dark_gray"
+                    android:drawableStart="@drawable/icon_schedule_participants"
+                    android:drawablePadding="5dp"
                     android:visibility="@{data.isConferenceCancelled ? View.GONE : View.VISIBLE}"
                     android:src="@drawable/icon_schedule_participants"/>
 
                 <TextView
+                    android:id="@+id/participants_list"
                     style="@style/conference_invite_desc_font"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
-                    android:layout_marginStart="5dp"
+                    android:layout_marginStart="23dp"
                     android:layout_marginEnd="10dp"
                     android:layout_toStartOf="@id/selected_info"
-                    android:layout_toEndOf="@id/participants_icon"
+                    android:layout_below="@id/participants_title"
                     android:background="@color/transparent_color"
                     android:drawablePadding="5dp"
                     android:visibility="@{data.isConferenceCancelled ? View.GONE : View.VISIBLE}"
@@ -241,7 +295,7 @@
                     android:layout_marginStart="10dp"
                     android:layout_marginEnd="10dp"
                     android:visibility="@{data.isConferenceCancelled ? View.GONE : View.VISIBLE}"
-                    android:text="@string/conference_schedule_address_title"/>
+                    android:text="@{data.isBroadcast ? @string/conference_schedule_broadcast_address_title : @string/conference_schedule_address_title, default=@string/conference_schedule_address_title}"/>
 
                 <LinearLayout
                     android:layout_width="match_parent"

app/src/main/res/layout/conference_scheduling_fragment.xml

@@ -137,6 +137,31 @@
                         android:layout_margin="10dp"
                         android:orientation="vertical">
 
+                        <LinearLayout
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:layout_margin="5dp"
+                            android:orientation="vertical"
+                            android:visibility="@{viewModel.isBroadcastAllowed ? View.VISIBLE : View.GONE, default=gone}">
+
+                            <TextView
+                                android:layout_width="wrap_content"
+                                android:layout_height="wrap_content"
+                                style="@style/conference_scheduling_font"
+                                android:text="@string/conference_schedule_mode"/>
+
+                            <Spinner
+                                android:layout_width="match_parent"
+                                android:layout_height="wrap_content"
+                                android:padding="10dp"
+                                android:layout_marginTop="5dp"
+                                style="@style/conference_scheduling_font"
+                                android:background="@drawable/icon_spinner_background"
+                                app:entries="@{viewModel.modesList}"
+                                app:selectedValue="@={viewModel.mode}"/>
+
+                        </LinearLayout>
+
                         <LinearLayout
                             android:layout_width="match_parent"
                             android:layout_height="wrap_content"

app/src/main/res/layout/conference_scheduling_participant_cell.xml

@@ -11,7 +11,8 @@
     <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="@dimen/conference_scheduling_participant_cell_height"
-        android:gravity="center_vertical">
+        android:gravity="center_vertical"
+        android:background="@color/white_color">
 
         <LinearLayout
             android:layout_width="match_parent"
@@ -76,6 +77,17 @@
 
         </LinearLayout>
 
+        <ImageView
+            android:onClick="@{() -> data.changeIsSpeaker()}"
+            android:visibility="@{data.showBroadcastControls ? View.VISIBLE : View.GONE}"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:padding="10dp"
+            android:src="@{data.isSpeaker ? @drawable/field_remove : @drawable/field_add, default=@drawable/field_add}"
+            android:layout_alignParentEnd="true"
+            android:layout_centerVertical="true"
+            android:layout_marginEnd="5dp" />
+
         <View
             android:layout_width="match_parent"
             android:layout_height="1dp"

app/src/main/res/layout/conference_scheduling_summary_fragment.xml

@@ -43,7 +43,7 @@
                     android:gravity="center"
                     android:orientation="horizontal"
                     style="@style/calls_list_header_font"
-                    android:text="@{viewModel.scheduleForLater ? @string/conference_schedule_summary : @string/conference_group_call_summary, default=@string/conference_group_call_summary}"/>
+                    android:text="@{viewModel.isModeBroadcastCurrentlySelected() ? @string/conference_schedule_broadcast_summary : viewModel.scheduleForLater ? @string/conference_schedule_summary : @string/conference_group_call_summary, default=@string/conference_group_call_summary}"/>
 
                 <View
                     android:layout_width="0dp"
@@ -268,14 +268,49 @@
                         android:layout_height="wrap_content"
                         android:layout_marginTop="10dp"
                         android:layout_marginLeft="10dp"
+                        android:layout_marginBottom="20dp"
                         style="@style/conference_scheduling_font"
                         android:visibility="@{viewModel.scheduleForLater &amp;&amp; viewModel.sendInviteViaChat ? View.VISIBLE : View.GONE}"
                         android:text="@string/conference_schedule_send_invite_chat_summary"/>
 
                     <LinearLayout
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:visibility="@{viewModel.isModeBroadcastCurrentlySelected() ? View.VISIBLE : View.GONE}"
+                        android:background="?attr/voipFormDisabledFieldBackgroundColor">
+
+                        <TextView
+                            android:layout_width="match_parent"
+                            android:layout_height="wrap_content"
+                            android:padding="5dp"
+                            android:layout_marginLeft="20dp"
+                            style="@style/calls_list_header_font"
+                            android:text="@string/conference_schedule_speakers_list"/>
+
+                    </LinearLayout>
+
+                    <LinearLayout
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:orientation="vertical"
+                        android:visibility="@{viewModel.isModeBroadcastCurrentlySelected() ? View.VISIBLE : View.GONE}"
+                        app:entries="@{viewModel.speakersData}"
+                        app:layout="@{@layout/conference_scheduling_participant_cell}" />
+
+                    <TextView
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
                         android:layout_marginTop="20dp"
+                        android:layout_marginBottom="20dp"
+                        android:layout_marginLeft="10dp"
+                        style="@style/calls_list_header_font"
+                        android:textColor="@color/light_grey_color"
+                        android:visibility="@{viewModel.isModeBroadcastCurrentlySelected() &amp;&amp; viewModel.speakersData.size() == 0 ? View.VISIBLE : View.GONE}"
+                        android:text="@string/conference_schedule_speakers_list_empty"/>
+
+                    <LinearLayout
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
                         android:background="?attr/voipFormDisabledFieldBackgroundColor">
 
                         <TextView
@@ -288,6 +323,16 @@
 
                     </LinearLayout>
 
+                    <TextView
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_marginTop="20dp"
+                        android:layout_marginLeft="10dp"
+                        style="@style/calls_list_header_font"
+                        android:textColor="@color/light_grey_color"
+                        android:visibility="@{viewModel.participantsData.size() == 0 ? View.VISIBLE : View.GONE, default=gone}"
+                        android:text="@string/conference_schedule_participants_list_empty"/>
+
                     <LinearLayout
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
@@ -310,10 +355,28 @@
                 android:layout_marginTop="10dp"
                 android:layout_marginBottom="10dp"
                 android:layout_gravity="center"
-                android:background="@drawable/shape_rect_orange_button"
+                android:background="@drawable/rect_orange_button"
+                android:visibility="@{viewModel.isModeBroadcastCurrentlySelected() ? View.GONE : View.VISIBLE}"
                 android:text="@{viewModel.isUpdate ? @string/conference_schedule_edit : viewModel.scheduleForLater ? @string/conference_schedule_start : @string/conference_group_call_create, default=@string/conference_group_call_create}"
                 style="@style/big_orange_button_font"/>
 
+            <TextView
+                android:onClick="@{() -> viewModel.createConference()}"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:paddingLeft="20dp"
+                android:paddingTop="8dp"
+                android:paddingRight="20dp"
+                android:paddingBottom="8dp"
+                android:layout_marginTop="10dp"
+                android:layout_marginBottom="10dp"
+                android:layout_gravity="center"
+                android:background="@drawable/rect_orange_button"
+                android:enabled="@{viewModel.participantsData.size() != 0 &amp;&amp; viewModel.speakersData.size() != 0}"
+                android:visibility="@{viewModel.isModeBroadcastCurrentlySelected() ? View.VISIBLE : View.GONE, default=gone}"
+                android:text="@{viewModel.isUpdate ? @string/conference_broadcast_edit : @string/conference_broadcast_start, default=@string/conference_broadcast_start}"
+                style="@style/big_orange_button_font"/>
+
         </LinearLayout>
 
         <include

app/src/main/res/layout/conference_waiting_room_fragment.xml

@@ -34,7 +34,7 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_centerInParent="true"
-            android:text="@string/conference_waiting_room_video_disabled"
+            android:text="@{viewModel.isConferenceBroadcastWithListenerRole ? @string/conference_waiting_room_listener_broadcast : @string/conference_waiting_room_video_disabled, default=@string/conference_waiting_room_video_disabled}"
             android:visibility="@{viewModel.isVideoEnabled ? View.GONE : View.VISIBLE}" />
 
         <androidx.constraintlayout.widget.ConstraintLayout
@@ -234,7 +234,7 @@
                 android:layout_marginEnd="5dp"
                 android:background="@drawable/button_background_reverse"
                 android:contentDescription="@{viewModel.isMicrophoneMuted ? @string/content_description_disable_mic_mute : @string/content_description_enable_mic_mute}"
-                android:enabled="@{!viewModel.joinInProgress}"
+                android:enabled="@{!viewModel.isConferenceBroadcastWithListenerRole &amp;&amp; !viewModel.joinInProgress}"
                 android:onClick="@{() -> viewModel.toggleMuteMicrophone()}"
                 android:padding="5dp"
                 android:selected="@{viewModel.isMicrophoneMuted}"
@@ -284,7 +284,7 @@
                 android:layout_marginStart="5dp"
                 android:background="@drawable/button_background_reverse"
                 android:contentDescription="@{viewModel.isVideoEnabled ? @string/content_description_disable_video : @string/content_description_enable_video}"
-                android:enabled="@{!viewModel.joinInProgress &amp;&amp; viewModel.isVideoAvailable &amp;&amp; !viewModel.isLowBandwidth}"
+                android:enabled="@{!viewModel.isConferenceBroadcastWithListenerRole &amp;&amp; !viewModel.joinInProgress &amp;&amp; viewModel.isVideoAvailable &amp;&amp; !viewModel.isLowBandwidth}"
                 android:onClick="@{() -> viewModel.toggleVideo()}"
                 android:padding="5dp"
                 android:selected="@{viewModel.isVideoEnabled}"

app/src/main/res/layout/settings_account_fragment.xml

@@ -240,7 +240,6 @@
                     linphone:title="@{@string/account_setting_conference_factory_address}"
                     linphone:listener="@{viewModel.conferenceFactoryUriListener}"
                     linphone:defaultValue="@{viewModel.conferenceFactoryUri}"
-                    android:visibility="gone"
                     linphone:inputType="@{InputType.TYPE_CLASS_TEXT}"/>
 
                 <include
@@ -248,7 +247,6 @@
                     linphone:title="@{@string/account_setting_audio_video_conference_factory_address}"
                     linphone:listener="@{viewModel.audioVideoConferenceFactoryUriListener}"
                     linphone:defaultValue="@{viewModel.audioVideoConferenceFactoryUri}"
-                    android:visibility="gone"
                     linphone:inputType="@{InputType.TYPE_CLASS_TEXT}"/>
 
                 <include
@@ -256,7 +254,6 @@
                     linphone:title="@{@string/account_setting_end_to_end_encryption_keys_server_url}"
                     linphone:listener="@{viewModel.limeServerUrlListener}"
                     linphone:defaultValue="@{viewModel.limeServerUrl}"
-                    android:visibility="gone"
                     linphone:inputType="@{InputType.TYPE_CLASS_TEXT}"/>
 
                 <include

app/src/main/res/layout/settings_conferences_fragment.xml

@@ -72,6 +72,13 @@
                     linphone:selectedIndex="@{viewModel.layoutIndex}"
                     linphone:labels="@{viewModel.layoutLabels}"/>
 
+                <include
+                    layout="@layout/settings_widget_switch"
+                    linphone:title="@{@string/conferences_settings_enable_broadcast_title}"
+                    linphone:subtitle="@{@string/conferences_settings_enable_broadcast_summary}"
+                    linphone:listener="@{viewModel.enableBroadcastListener}"
+                    linphone:checked="@={viewModel.enableBroadcast}"/>
+
             </LinearLayout>
 
         </androidx.core.widget.NestedScrollView>

app/src/main/res/layout/voip_buttons.xml

@@ -46,10 +46,10 @@
             android:layout_marginEnd="5dp"
             android:background="@drawable/button_background_reverse"
             android:contentDescription="@{callsViewModel.isMicrophoneMuted ? @string/content_description_disable_mic_mute : @string/content_description_enable_mic_mute}"
-            android:enabled="@{callsViewModel.isMuteMicrophoneEnabled}"
+            android:enabled="@{callsViewModel.isMuteMicrophoneEnabled && !conferenceViewModel.isMeListenerOnly}"
             android:onClick="@{() -> callsViewModel.toggleMuteMicrophone()}"
             android:padding="5dp"
-            android:selected="@{callsViewModel.isMicrophoneMuted}"
+            android:selected="@{callsViewModel.isMicrophoneMuted || conferenceViewModel.isMeListenerOnly}"
             android:src="@drawable/icon_toggle_mic"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintDimensionRatio="W,1:1"
@@ -96,10 +96,10 @@
             android:layout_marginStart="5dp"
             android:background="@drawable/button_background_reverse"
             android:contentDescription="@{controlsViewModel.isVideoEnabled && controlsViewModel.isSendingVideo ? @string/content_description_disable_video : @string/content_description_enable_video}"
-            android:enabled="@{controlsViewModel.isVideoAvailable && !controlsViewModel.isVideoUpdateInProgress}"
+            android:enabled="@{controlsViewModel.isVideoAvailable && !controlsViewModel.isVideoUpdateInProgress && !conferenceViewModel.isMeListenerOnly}"
             android:onClick="@{() -> (!conferenceViewModel.conferenceExists || conferenceViewModel.conferenceDisplayMode != ConferenceDisplayMode.AUDIO_ONLY) ? controlsViewModel.toggleVideo() : conferenceViewModel.switchLayoutFromAudioOnlyToActiveSpeaker()}"
             android:padding="5dp"
-            android:selected="@{controlsViewModel.isVideoEnabled && controlsViewModel.isSendingVideo}"
+            android:selected="@{controlsViewModel.isVideoEnabled && controlsViewModel.isSendingVideo && !conferenceViewModel.isMeListenerOnly}"
             android:visibility="@{controlsViewModel.hideVideo ? View.GONE : View.VISIBLE}"
             android:src="@drawable/icon_toggle_camera"
             app:layout_constraintBottom_toBottomOf="parent"

app/src/main/res/layout/voip_buttons_extra.xml

@@ -39,6 +39,7 @@
             android:gravity="center"
             android:onClick="@{() -> controlsViewModel.showNumpad()}"
             android:text="@string/call_action_numpad"
+            android:enabled="@{!conferenceViewModel.isBroadcast}"
             app:drawableTopCompat="@drawable/icon_call_numpad"
             app:layout_constraintBottom_toBottomOf="@id/chat"
             app:layout_constraintEnd_toStartOf="@id/call_stats"
@@ -175,6 +176,7 @@
             android:gravity="center"
             android:onClick="@{() -> controlsViewModel.goToCallsList()}"
             android:text="@string/call_action_calls_list"
+            android:enabled="@{!conferenceViewModel.isBroadcast}"
             app:drawableTopCompat="@drawable/icon_calls_list"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toEndOf="parent"

app/src/main/res/layout/voip_conference_active_speaker.xml

@@ -125,6 +125,7 @@
             android:id="@+id/active_speaker_background"
             android:layout_width="0dp"
             android:layout_height="0dp"
+            android:visibility="@{conferenceViewModel.speakingParticipantFound ? View.VISIBLE : View.GONE}"
             app:layout_constraintTop_toBottomOf="@id/top_barrier"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
@@ -139,6 +140,7 @@
             android:layout_height="0dp"
             android:layout_margin="10dp"
             android:contentDescription="@null"
+            android:visibility="@{conferenceViewModel.speakingParticipantFound ? View.VISIBLE : View.GONE}"
             coilVoipContact="@{conferenceViewModel.speakingParticipant}"
             android:background="@drawable/generated_avatar_bg"
             app:layout_constraintBottom_toBottomOf="@id/active_speaker_background"
@@ -157,7 +159,7 @@
             android:background="@drawable/shape_button_background"
             android:contentDescription="@string/content_description_participant_is_paused"
             android:src="@drawable/icon_pause"
-            android:visibility="@{conferenceViewModel.speakingParticipant.isInConference ? View.GONE : View.VISIBLE, default=gone}"
+            android:visibility="@{conferenceViewModel.speakingParticipantFound && conferenceViewModel.speakingParticipant.isInConference ? View.GONE : View.VISIBLE, default=gone}"
             app:layout_constraintDimensionRatio="1:1"
             app:layout_constraintBottom_toBottomOf="@id/active_speaker_background"
             app:layout_constraintEnd_toEndOf="@id/active_speaker_background"
@@ -254,6 +256,7 @@
             android:id="@+id/local_participant_background"
             android:layout_width="0dp"
             android:layout_height="0dp"
+            android:visibility="@{conferenceViewModel.isMeListenerOnly ? View.GONE : View.VISIBLE}"
             app:layout_constraintTop_toBottomOf="@id/top_barrier"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
@@ -268,6 +271,7 @@
             android:layout_height="0dp"
             android:layout_margin="10dp"
             android:contentDescription="@null"
+            android:visibility="@{conferenceViewModel.isMeListenerOnly ? View.GONE : View.VISIBLE}"
             coilSelfAvatar="@{conferenceViewModel.meParticipant}"
             android:background="@drawable/generated_avatar_bg"
             app:layout_constraintDimensionRatio="1:1"
@@ -298,6 +302,7 @@
             android:layout_marginStart="5dp"
             android:layout_marginEnd="5dp"
             android:layout_marginBottom="5dp"
+            android:visibility="@{conferenceViewModel.isMeListenerOnly ? View.GONE : View.VISIBLE}"
             android:text="@{conferenceViewModel.meParticipant.contact.name ?? conferenceViewModel.meParticipant.displayName}"
             app:layout_constraintBottom_toBottomOf="@id/local_participant_background"
             app:layout_constraintStart_toStartOf="@id/local_participant_background"

app/src/main/res/layout/voip_conference_participant_broadcast_cell.xml

@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <data>
+        <import type="android.view.View"/>
+        <variable
+            name="data"
+            type="org.linphone.activities.voip.data.ConferenceParticipantData" />
+    </data>
+
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="50dp"
+        android:layout_margin="5dp"
+        android:gravity="center_vertical">
+
+        <ImageView
+            android:id="@+id/avatar"
+            android:layout_width="@dimen/contact_avatar_size"
+            android:layout_height="@dimen/contact_avatar_size"
+            android:contentDescription="@null"
+            coilContact="@{data}"
+            android:layout_marginStart="10dp"
+            android:layout_marginEnd="10dp"
+            android:layout_centerVertical="true"
+            android:background="@drawable/generated_avatar_bg"
+            android:src="@drawable/voip_single_contact_avatar"/>
+
+        <ImageView
+            android:id="@+id/delete"
+            android:layout_width="40dp"
+            android:layout_height="40dp"
+            android:layout_alignParentEnd="true"
+            android:layout_centerInParent="true"
+            android:contentDescription="@string/content_description_remove_contact_from_chat_room"
+            android:onClick="@{() -> data.removeParticipantFromConference()}"
+            android:paddingLeft="5dp"
+            android:paddingRight="5dp"
+            android:src="@drawable/icon_cancel_alt"
+            android:visibility="@{data.isMeAdmin ? View.VISIBLE : View.INVISIBLE}" />
+
+        <LinearLayout
+            android:id="@+id/speakerLayout"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_centerVertical="true"
+            android:layout_toStartOf="@id/delete"
+            android:layout_marginStart="5dp"
+            android:layout_marginEnd="10dp"
+            android:visibility="@{data.isSpeaker ? View.VISIBLE : View.INVISIBLE}">
+
+            <ImageView
+                android:layout_width="20dp"
+                android:layout_height="20dp"
+                android:layout_gravity="center"
+                android:adjustViewBounds="true"
+                android:padding="5dp"
+                android:scaleType="centerInside"
+                android:contentDescription="@string/content_description_contact_is_speaker"
+                android:src="@drawable/check_selected" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:text="@string/conference_participants_list_speaker_label"
+                android:textColor="?attr/primaryTextColor" />
+
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_centerVertical="true"
+            android:layout_marginStart="10dp"
+            android:layout_toStartOf="@id/speakerLayout"
+            android:layout_toEndOf="@id/avatar"
+            android:orientation="vertical">
+
+            <org.linphone.views.MarqueeTextView
+                style="@style/contact_name_list_cell_font"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:singleLine="true"
+                android:text="@{data.contact.name ?? data.displayName, default=`Bilbo Baggins`}" />
+
+            <org.linphone.views.MarqueeTextView
+                android:id="@+id/sipUri"
+                style="@style/sip_uri_small_font"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:singleLine="true"
+                android:ellipsize="end"
+                android:text="@{data.sipUri, default=`sip:bilbo.baggins@sip.linphone.org`}" />
+
+        </LinearLayout>
+
+    </RelativeLayout>
+
+</layout>

app/src/main/res/layout/voip_conference_participants_fragment.xml

@@ -76,7 +76,7 @@
                 android:layout_height="wrap_content"
                 android:orientation="vertical"
                 app:entries="@{conferenceViewModel.conferenceParticipants}"
-                app:layout="@{@layout/voip_conference_participant_cell}" />
+                app:layout="@{conferenceViewModel.isBroadcast ? @layout/voip_conference_participant_broadcast_cell : @layout/voip_conference_participant_cell}" />
 
         </androidx.core.widget.NestedScrollView>
 

app/src/main/res/values-fr/strings.xml

@@ -799,4 +799,25 @@
     <string name="chat_message_many_reactions">%s réactions</string>
     <string name="conference_invitation_notification_short_desc">invitation à une conférence</string>
     <string name="chat_message_voice_recording_notification_short_desc">message vocal</string>
+    <string name="conference_schedule_mode">Mode</string>
+    <string name="conference_schedule_mode_meeting">Réunion</string>
+    <string name="conference_schedule_mode_broadcast">Webinar</string>
+    <string name="conference_schedule_broadcast_summary">Informations du webinar</string>
+    <string name="conference_schedule_speakers_list">Liste des intervenants</string>
+    <string name="conference_schedule_speakers_list_empty">Choisissez au moins un intervenant</string>
+    <string name="conference_schedule_participants_list_empty">Choisissez au moins un participant</string>
+    <string name="conference_broadcast_start">Planifier un webinar</string>
+    <string name="conference_broadcast_edit">Modifier le webinar</string>
+    <string name="conference_meeting_title">Réunion :</string>
+    <string name="conference_broadcast_title">Webinar :</string>
+    <string name="conference_invite_speakers_list_title">Intervenants</string>
+    <string name="conference_invite_participants_list_title">Participants</string>
+    <string name="conference_broadcast_invite_title">Invitation au webinar :</string>
+    <string name="conference_broadcast_invite_you_are_speaker">(vous êtes un intervenant)</string>
+    <string name="conference_schedule_broadcast_address_title">Adresse du webinar</string>
+    <string name="conference_waiting_room_listener_broadcast">Vous n\'êtes pas un intervenant de ce webinar</string>
+    <string name="conferences_settings_enable_broadcast_title">Autoriser les webinar</string>
+    <string name="conferences_settings_enable_broadcast_summary">Fonctionalité encore en béta !</string>
+    <string name="conference_participants_list_speaker_label">Intervenant</string>
+    <string name="content_description_contact_is_speaker">Contact is a speaker</string>
 </resources>

app/src/main/res/values/colors.xml

@@ -6,6 +6,7 @@
     <!-- You can use https://material.io/design/color/#tools-for-picking-colors to get dark color value from primary -->
     <color name="primary_dark_color">#e65000</color>
     <color name="primary_light_color">#ffab4d</color>
+    <color name="primary_color_disabled">#4DFE5E00</color> <!-- Try to have a color that renders well on both light & dark theme -->
     <color name="notification_led_color">#ff8000</color>
 
     <color name="black_color">#000000</color>

app/src/main/res/values/strings.xml

@@ -274,11 +274,15 @@
     <string name="conference_schedule_subject_hint">Meeting subject</string>
     <string name="conference_group_call_subject_hint">Group call subject</string>
     <string name="conference_schedule_address_title">Meeting address</string>
+    <string name="conference_schedule_broadcast_address_title">Broadcast address</string>
     <string name="conference_schedule_description_title">Add a description</string>
     <string name="conference_schedule_description_hint">Description</string>
     <string name="conference_schedule_date">Date</string>
     <string name="conference_schedule_time">Time</string>
     <string name="conference_schedule_duration">Duration</string>
+    <string name="conference_schedule_mode">Mode</string>
+    <string name="conference_schedule_mode_meeting">Meeting</string>
+    <string name="conference_schedule_mode_broadcast">Broadcast</string>
     <string name="conference_schedule_timezone">Timezone</string>
     <string name="conference_schedule_send_invite_chat">Send invite via &appName;</string>
     <string name="conference_schedule_send_updated_invite_chat">Send update via &appName;</string>
@@ -287,11 +291,17 @@
     <string name="conference_schedule_encryption">Would you like to encrypt the meeting?</string>
     <string name="conference_schedule_send_invite_chat_summary">Invite will be sent out from my &appName; account</string>
     <string name="conference_schedule_participants_list">Participants list</string>
+    <string name="conference_schedule_speakers_list">Speakers list</string>
+    <string name="conference_schedule_speakers_list_empty">Select at least one speaker</string>
+    <string name="conference_schedule_participants_list_empty">Select at least one participant</string>
     <string name="conference_organizer">Organizer</string>
     <string name="conference_schedule_summary">Meeting info</string>
     <string name="conference_group_call_summary">Group call info</string>
+    <string name="conference_schedule_broadcast_summary">Broadcast info</string>
     <string name="conference_schedule_start">Schedule meeting</string>
     <string name="conference_schedule_edit">Edit meeting</string>
+    <string name="conference_broadcast_start">Schedule broadcast</string>
+    <string name="conference_broadcast_edit">Edit broadcast</string>
     <string name="conference_group_call_create">Start group call</string>
     <string name="conference_schedule_address_copied_to_clipboard">Meeting address copied into clipboard</string>
     <string name="conference_schedule_info_not_sent_to_participant">Failed to send meeting info to a participant</string>
@@ -300,6 +310,8 @@
     <string name="conference_default_title">Remote group call</string>
     <string name="conference_local_title">Local group call</string>
     <string name="conference_invite_title">Meeting invite:</string>
+    <string name="conference_broadcast_invite_title">Broadcast invite:</string>
+    <string name="conference_broadcast_invite_you_are_speaker">(you are a speaker)</string>
     <string name="conference_update_title">Meeting has been updated:</string>
     <string name="conference_cancel_title">Meeting has been cancelled:</string>
     <string name="conference_description_title">Description</string>
@@ -311,6 +323,7 @@
     <string name="conference_waiting_room_start_call">Start</string>
     <string name="conference_waiting_room_cancel_call">Cancel</string>
     <string name="conference_waiting_room_video_disabled">Video is currently disabled</string>
+    <string name="conference_waiting_room_listener_broadcast">You aren\'t a speaker in this broadcast</string>
     <string name="conference_scheduled">Meetings</string>
     <string name="conference_layout_too_many_participants_for_mosaic">You can\'t change group call layout as there is too many participants</string>
     <string name="conference_too_many_participants_for_mosaic_layout">There is too many participants for mosaic layout, switching to active speaker</string>
@@ -346,6 +359,11 @@
     </plurals>
     <string name="conference_scheduled_cancelled_by_organizer">Conference has been cancelled by organizer</string>
     <string name="conference_scheduled_cancelled_by_me">You have cancelled the conference</string>
+    <string name="conference_meeting_title">Meeting:</string>
+    <string name="conference_broadcast_title">Broadcast:</string>
+    <string name="conference_invite_speakers_list_title">Speakers</string>
+    <string name="conference_invite_participants_list_title">Participants</string>
+    <string name="conference_participants_list_speaker_label">Speaker</string>
 
     <!-- Call -->
     <string name="call_incoming_title">Incoming Call</string>
@@ -746,6 +764,8 @@
 
     <!-- Conferences settings -->
     <string name="conferences_settings_layout_title">Default layout</string>
+    <string name="conferences_settings_enable_broadcast_title">Allow broadcasts</string>
+    <string name="conferences_settings_enable_broadcast_summary">Feature currently in beta!</string>
 
     <!-- Notifications -->
     <string name="notification_channel_service_id" translatable="false">linphone_notification_service_id</string>
@@ -851,6 +871,7 @@
     <string name="content_description_remove_contact_from_chat_room">Remove contact from conversation</string>
     <string name="content_description_contact_is_admin">Contact is an admin in this conversation</string>
     <string name="content_description_contact_is_not_admin">Contact isn\'t an admin in this conversation</string>
+    <string name="content_description_contact_is_speaker">Contact is a speaker</string>
     <string name="content_description_ephemeral_chat_room">Messages are ephemeral in this conversation</string>
     <string name="content_description_muted_chat_room">Notifications are disabled for this conversation</string>
     <string name="content_description_contact_can_do_encryption">Contact can be invited in encrypted conversations</string>