Add unicode font, fix mem corruption

Or at least, make the memory corruption so hard to reproduce that I wasn't able to run into it even after trying really hard.

cdata.cpp

@@ -20,7 +20,7 @@
 
 CData::CData(const QString &data, uint16_t byteSize)
 {
-    cData = new uint8_t[byteSize];
+    cData = new uint8_t[byteSize+1];
     cDataSize = fromString(data, cData);
 }
 

core.cpp

@@ -1116,8 +1116,13 @@ void Core::prepareCall(int friendId, int callId, ToxAv* toxav, bool videoEnabled
 
     // Go
     /// BUG: TODO: Memory corryption and crashes atexit when playCallAudio is threaded
-    if (calls[callId].audioOutput != nullptr)
-        calls[callId].playFuture = QtConcurrent::run(playCallAudio, callId, toxav);
+    //if (calls[callId].audioOutput != nullptr)
+    //    calls[callId].playFuture = QtConcurrent::run(playCallAudio, callId, toxav);
+
+    calls[callId].playAudioTimer.setInterval(5);
+    calls[callId].playAudioTimer.setSingleShot(true);
+    connect(&calls[callId].playAudioTimer, &QTimer::timeout, [=](){playCallAudio(callId,toxav);});
+    calls[callId].playAudioTimer.start();
     if (calls[callId].audioInput != nullptr)
         calls[callId].recordFuture = QtConcurrent::run(sendCallAudio, callId, toxav);
     calls[callId].active = true;
@@ -1138,8 +1143,8 @@ void Core::cleanupCall(int callId)
 
 void Core::playCallAudio(int callId, ToxAv* toxav)
 {
-    while (calls[callId].active)
-    {
+    if (!calls[callId].active)
+        return;
     int framesize = (calls[callId].codecSettings.audio_frame_duration * calls[callId].codecSettings.audio_sample_rate) / 1000;
     uint8_t buf[framesize*2];
     int len = toxav_recv_audio(toxav, callId, framesize, (int16_t*)buf);
@@ -1151,13 +1156,13 @@ void Core::playCallAudio(int callId, ToxAv* toxav)
             return;
         }
         qDebug() << QString("Core::playCallAudio: Error receiving audio: %1").arg(len);
-            QThread::msleep(5);
-            continue;
+        calls[callId].playAudioTimer.start();
+        return;
     }
     if (len == 0)
     {
-            QThread::msleep(5); /// BUG: Another thread crashed with corruption while we slept here
-            continue;
+        calls[callId].playAudioTimer.start();
+        return;
     }
     //qDebug() << QString("Core: Received %1 bytes, %2 audio bytes free, %3 core buffer size")
     //            .arg(len*2).arg(calls[callId].audioOutput->bytesFree()).arg(calls[callId].audioBuffer.bufferSize());
@@ -1166,15 +1171,15 @@ void Core::playCallAudio(int callId, ToxAv* toxav)
     if (state != QAudio::ActiveState)
     {
         qDebug() << QString("Core: Audio state is %1").arg(state);
-            if (state == 3)
+        if (state == 3 && calls[callId].audioBuffer.bytesAvailable() >= framesize*2)
             calls[callId].audioOutput->start(&calls[callId].audioBuffer);
     }
     int error = calls[callId].audioOutput->error();
     if (error != QAudio::NoError)
         qWarning() << QString("Core::playCallAudio: Error: %1").arg(error);
 
-        QThread::msleep(5);
-    }
+
+    calls[callId].playAudioTimer.start();
 }
 
 void Core::sendCallAudio(int callId, ToxAv* toxav)

core.h

@@ -93,6 +93,7 @@ public:
     QAudioInput* audioInput;
     QIODevice* audioInputDevice;
     ToxAvCodecSettings codecSettings;
+    QTimer playAudioTimer, sendAudioTimer;
     int callId;
     int friendId;
     bool videoEnabled;

main.cpp

@@ -1,11 +1,16 @@
 #include "widget/widget.h"
 #include <QApplication>
+#include <QFontDatabase>
 
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
     a.setApplicationName("Toxgui");
     a.setOrganizationName("Tox");
+
+    // install Unicode 6.1 supporting font
+    QFontDatabase::addApplicationFont("://DejaVuSans.ttf");
+
     Widget* w = Widget::getInstance();
     w->show();
 

res.qrc

@@ -2,4 +2,7 @@
     <qresource prefix="/conf">
         <file alias="settings.ini">res/settings.ini</file>
     </qresource>
+    <qresource prefix="/font">
+        <file alias="DejaVuSans.ttf">res/DejaVuSans.ttf</file>
+    </qresource>
 </RCC>