fix(audio): alternate audio fix implementation from #4139

src/core/core.cpp

@@ -534,6 +534,10 @@ void Core::onGroupMessage(Tox*, uint32_t groupId, uint32_t peerId, TOX_MESSAGE_T
 void Core::onGroupNamelistChange(Tox*, uint32_t groupId, uint32_t peerId,
                                  TOX_CONFERENCE_STATE_CHANGE change, void* core)
 {
+    CoreAV* coreAv = static_cast<Core*>(core)->getAv();
+    if((change == TOX_CONFERENCE_STATE_CHANGE_PEER_EXIT) && (coreAv->isGroupAvEnabled(groupId))) {
+        CoreAV::invalidateGroupCallPeerSource(groupId, peerId);
+    }
     qDebug() << QString("Group namelist change %1:%2 %3").arg(groupId).arg(peerId).arg(change);
     emit static_cast<Core*>(core)->groupNamelistChanged(groupId, peerId, change);
 }

src/core/coreav.cpp

@@ -497,13 +497,24 @@ void CoreAV::groupCallCallback(void* tox, int group, int peer,
         return;
 
     Audio& audio = Audio::getInstance();
-    if (!call.alSource)
-        audio.subscribeOutput(call.alSource);
+    if (!call.peers[peer])
+        audio.subscribeOutput(call.peers[peer]);
 
-    audio.playAudioBuffer(call.alSource, data, samples, channels,
+    audio.playAudioBuffer(call.peers[peer], data, samples, channels,
                           sample_rate);
 }
 
+/**
+ * @brief Called from core to make sure the source for that peer is invalidated when they leave.
+ * @param group Group Index
+ * @param peer Peer Index
+ */
+void CoreAV::invalidateGroupCallPeerSource(int group, int peer) {
+    Audio &audio = Audio::getInstance();
+    audio.unsubscribeOutput(groupCalls[group].peers[peer]);
+    groupCalls[group].peers[peer] = 0;
+}
+
 /**
  * @brief Get a call's video source.
  * @param friendNum Id of friend in call list.
@@ -662,7 +673,7 @@ void CoreAV::invalidateCallSources()
 {
     for (ToxGroupCall& call : groupCalls)
     {
-        call.alSource = 0;
+        call.peers.clear();
     }
 
     for (ToxFriendCall& call : calls)

src/core/coreav.h

@@ -79,6 +79,7 @@ class CoreAV : public QObject
                                   const int16_t* data, unsigned samples,
                                   uint8_t channels, unsigned sample_rate,
                                   void* core);
+    static void invalidateGroupCallPeerSource(int group, int peer);
 
 public slots:
     bool startCall(uint32_t friendNum, bool video=false);

src/core/toxcall.cpp

@@ -22,6 +22,9 @@
  *
  * @var TOXAV_FRIEND_CALL_STATE ToxFriendCall::state
  * @brief State of the peer (not ours!)
+ *
+ * @var QMap ToxGroupCall::peers
+ * @brief Keeps sources for users in group calls.
  */
 
 using namespace std;
@@ -192,6 +195,16 @@ ToxGroupCall::ToxGroupCall(ToxGroupCall&& other) noexcept
 {
 }
 
+ToxGroupCall::~ToxGroupCall()
+{
+    Audio& audio = Audio::getInstance();
+
+    for(quint32 v : peers)
+    {
+        audio.unsubscribeOutput(v);
+    }
+}
+
 ToxGroupCall &ToxGroupCall::operator=(ToxGroupCall &&other) noexcept
 {
     ToxCall::operator =(move(other));

src/core/toxcall.h

@@ -4,6 +4,7 @@
 #include <cstdint>
 #include <QtGlobal>
 #include <QMetaObject>
+#include <QMap>
 
 #include "src/core/indexedlist.h"
 
@@ -69,9 +70,12 @@ struct ToxGroupCall : public ToxCall
     ToxGroupCall() = default;
     ToxGroupCall(int GroupNum, CoreAV& av);
     ToxGroupCall(ToxGroupCall&& other) noexcept;
+    ~ToxGroupCall();
 
     ToxGroupCall& operator=(ToxGroupCall&& other) noexcept;
 
+    QMap<int, quint32> peers;
+
     // If you add something here, don't forget to override the ctors and move operators!
 };