Now on pause fill the buffer with silent instead stopping.

Abandono esta rama de desarrollo:
1. Al cambiar el volumen se escucha ruido
2. QAudioOutput::reset() no funciona correctamente
3. Hay muchos pops en la reproducción

src/audiolayerwidget.cpp

@@ -5,6 +5,8 @@
 #include <QFile>
 #include <QTime>
 
+#include <time.h> // nanosleep y la chapuza de liberar el buffer
+
 AudioLayerWidget::AudioLayerWidget(QWidget *parent, QString name):
     QGroupBox(parent)
   ,   m_suspendResumeButton(0)
@@ -19,7 +21,8 @@ AudioLayerWidget::AudioLayerWidget(QWidget *parent, QString name):
   , m_progressCounter(new QTime(0,0,0,1))
   , m_progressMs(0)
   , m_currentMedia(" ")
-
+  , m_running(false)
+  , m_emptyBuffer()
 {
     this->setTitle(name);
 
@@ -122,6 +125,11 @@ AudioLayerWidget::AudioLayerWidget(QWidget *parent, QString name):
     m_format.setByteOrder(QAudioFormat::LittleEndian);
     m_format.setSampleType(QAudioFormat::SignedInt);
 
+    // Init the silent buffer
+    QAudioBuffer *abuf = new QAudioBuffer(44100, m_format, -1);
+    QByteArray ba((const char*)abuf->data(), abuf->byteCount());
+    m_emptyBuffer.append(ba);
+
     QAudioDeviceInfo info(QAudioDeviceInfo::defaultOutputDevice());
     if (!info.isFormatSupported(m_format)) {
         qWarning("Default format not supported - trying to use nearest");
@@ -139,7 +147,6 @@ AudioLayerWidget::AudioLayerWidget(QWidget *parent, QString name):
     m_watchDMX->start(1000);
 
     createAudioOutput();
-    pause();
 }
 
 AudioLayerWidget::~AudioLayerWidget()
@@ -152,10 +159,13 @@ void AudioLayerWidget::createAudioOutput()
     m_audioOutput = new QAudioOutput(m_device, m_format, this);
     Q_CHECK_PTR(m_audioOutput);
     m_audioOutput->setNotifyInterval(NOTIFY_INTERVAL);
+    m_audioOutput->setCategory("LibreMediaServer");
     connect(m_audioOutput, SIGNAL(notify()), SLOT(notified()));
-    reset();
+    m_output = m_audioOutput->start();
+    Q_CHECK_PTR(m_output);
     m_statusValue->setText(PAUSE_LABEL);
     connect(m_audioOutput, SIGNAL(stateChanged(QAudio::State)), SLOT(handleStateChanged(QAudio::State)));
+    m_pullTimer->start(PULL_TIMER_INTERVAL);
 }
 
 void AudioLayerWidget::deviceChanged(int index)
@@ -220,6 +230,7 @@ void AudioLayerWidget::pullTimerExpired()
     if (m_audioOutput && m_audioOutput->state() != QAudio::StoppedState) {
         int chunks = m_audioOutput->bytesFree() / m_audioOutput->periodSize();
         while (chunks) {
+            if (m_running) {
                 const qint64 len = m_decoder->read(m_buffer.data(), m_audioOutput->periodSize());
                 if ( len == -1) {
                     stop();
@@ -231,11 +242,13 @@ void AudioLayerWidget::pullTimerExpired()
                 }
                 if (len != m_audioOutput->periodSize())
                 break;
+            } else {
+                m_output->write(m_emptyBuffer.data(), m_audioOutput->periodSize());
+            }
             --chunks;
         }
     }
 }
-
 void AudioLayerWidget::toggleSuspendResume()
 {
     if (m_audioOutput->state() == QAudio::SuspendedState) {
@@ -246,7 +259,8 @@ void AudioLayerWidget::toggleSuspendResume()
         play();
     } else if (m_audioOutput->state() == QAudio::IdleState) {
         qWarning("%s: IdleState", this->title().toLatin1().constData());
-        play();
+        reset();
+        resume();
     }
 }
 
@@ -254,12 +268,16 @@ void AudioLayerWidget::handleStateChanged(QAudio::State state)
 {
     if (state == QAudio::SuspendedState) {
         m_statusValue->setText(PAUSE_LABEL);
+        qDebug("Pause");
     } else if (state == QAudio::ActiveState) {
         m_statusValue->setText(PLAY_LABEL);
+        qDebug("Play");
     } else if (m_audioOutput->state() == QAudio::StoppedState) {
         m_statusValue->setText(STOP_LABEL);
+        qDebug("Stop");
     } else if (state == QAudio::IdleState) {
         m_statusValue->setText(IDDLE_LABEL);
+        qDebug("Iddle");
     }
 }
 
@@ -273,10 +291,10 @@ void AudioLayerWidget::durationChanged(qint64 dur)
 
 void AudioLayerWidget::play()
 {
-//    reset();
     setInitPosition();
-    m_pullTimer->start(PULL_TIMER_INTERVAL);
+//    m_pullTimer->start(PULL_TIMER_INTERVAL);
-    m_audioOutput->resume();
+//    m_audioOutput->resume();
+    m_running = true;
     pullTimerExpired();
     m_progressCounter->start();
     m_suspendResumeButton->setText(tr(SUSPEND_LABEL));
@@ -284,15 +302,17 @@ void AudioLayerWidget::play()
 
 void AudioLayerWidget::pause()
 {
-     m_audioOutput->suspend();
+//     m_pullTimer->stop();
-     m_pullTimer->stop();
+//     m_audioOutput->suspend();
+     m_running = false;
      m_suspendResumeButton->setText(tr(RESUME_LABEL));
 }
 
 void AudioLayerWidget::resume()
 {
-    m_pullTimer->start(PULL_TIMER_INTERVAL);
+//    m_pullTimer->start(PULL_TIMER_INTERVAL);
-    m_audioOutput->resume();
+//    m_audioOutput->resume();
+    m_running = true;
     pullTimerExpired();
     m_progressCounter->start();
     m_suspendResumeButton->setText(tr(SUSPEND_LABEL));
@@ -300,7 +320,7 @@ void AudioLayerWidget::resume()
 
 void AudioLayerWidget::stop()
 {
-//    reset();
+    m_running = false;
     setInitPosition();
 }
 
@@ -310,12 +330,11 @@ void AudioLayerWidget::reset()
     m_audioOutput->reset();
     m_output = m_audioOutput->start();
     Q_CHECK_PTR(m_output);
-//    pause();
 }
 
 void AudioLayerWidget::setInitPosition()
 {
-    reset();
+//    reset();
     m_decoder->setPos(0);
     m_progressMs = 0;
     m_progressTime->setTime(QTime::fromMSecsSinceStartOfDay(m_progressMs));
@@ -330,3 +349,8 @@ void AudioLayerWidget::updateWatchDMX(bool b)
 {
     m_receiveDMX->setChecked(b);
 }
+
+void AudioLayerWidget::flushBuffer()
+{
+    // Esto es una chapuza para arreglar que reset() no limpia el buffer realmente
+}

src/audiolayerwidget.h

@@ -79,11 +79,16 @@ private:
 
     QString m_currentMedia;
 
+    bool m_running;
+
+    QByteArray m_emptyBuffer;
+
     void createAudioOutput();
 
     void reset();
     void setInitPosition();
 
+    void flushBuffer();
 private slots:
     void notified();
     void pullTimerExpired();

src/libremediaserver-audio.ui

@@ -7,8 +7,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>60</width>
+    <width>126</width>
-    <height>57</height>
+    <height>89</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -20,7 +20,7 @@
     <rect>
      <x>0</x>
      <y>0</y>
-     <width>60</width>
+     <width>126</width>
      <height>29</height>
     </rect>
    </property>