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project/fm_viewer/fav/AudioOutputNull.cpp

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+/******************************************************************************
+    QtAV:  Multimedia framework based on Qt and FFmpeg
+    Copyright (C) 2012-2016 Wang Bin <wbsecg1@gmail.com>
+
+*   This file is part of QtAV (from 2015)
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+******************************************************************************/
+
+#include "AudioOutputBackend.h"
+#include "mkid.h"
+#include "factory.h"
+
+namespace FAV {
+//TODO: block internally
+static const char kName[] = "null";
+class AudioOutputNull : public AudioOutputBackend
+{
+public:
+    AudioOutputNull(QObject *parent = 0);
+    QString name() const Q_DECL_OVERRIDE { return QLatin1String(kName);}
+    QString status() const Q_DECL_OVERRIDE {return "";};
+    bool open() Q_DECL_OVERRIDE { return true;}
+    bool close() Q_DECL_OVERRIDE { return true;}
+    // TODO: check channel layout. Null supports channels>2
+    BufferControl bufferControl() const Q_DECL_OVERRIDE { return Blocking;}
+    bool write(const QByteArray&) Q_DECL_OVERRIDE { return true;}
+    bool play() Q_DECL_OVERRIDE { return true;}
+
+};
+
+typedef AudioOutputNull AudioOutputBackendNull;
+static const AudioOutputBackendId AudioOutputBackendId_Null = mkid::id32base36_4<'n', 'u', 'l', 'l'>::value;
+FACTORY_REGISTER(AudioOutputBackend, Null, kName)
+
+AudioOutputNull::AudioOutputNull(QObject *parent)
+    : AudioOutputBackend(AudioOutput::DeviceFeatures(), parent)
+{}
+
+} //namespace FAV