CoreAudio: Create an audio plugin supporting iOS and OS X

This removes the Mac audio backend that was hardcoded into QtMultimedia
and adds a new audio plugin using the CoreAudio API.

Change-Id: Ib15291825f9452a3763e0eeb281d952deb0bad3d
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>

1 files changed, 130 insertions, 0 deletions

diff --git a/src/plugins/coreaudio/coreaudiosessionmanager.h b/src/plugins/coreaudio/coreaudiosessionmanager.h
new file mode 100644
index 000000000..61d8967b1
--- /dev/null
+++ b/src/plugins/coreaudio/coreaudiosessionmanager.h
@@ -0,0 +1,130 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef IOSAUDIOSESSIONMANAGER_H
+#define IOSAUDIOSESSIONMANAGER_H
+
+#include <QObject>
+#ifdef QT_DEBUG_COREAUDIO
+# include <QtCore/QDebug>
+#endif
+
+@class CoreAudioSessionObserver;
+
+QT_BEGIN_NAMESPACE
+
+class CoreAudioSessionManager : public QObject
+{
+    Q_OBJECT
+public:
+    enum AudioSessionCategorys {
+        Ambient,
+        SoloAmbient,
+        Playback,
+        Record,
+        PlayAndRecord,
+        AudioProcessing,
+        MultiRoute
+    };
+    enum AudioSessionCategoryOptions {
+        None = 0,
+        MixWithOthers = 1,
+        DuckOthers = 2,
+        AllowBluetooth = 4,
+        DefaultToSpeaker = 8
+    };
+    enum AudioSessionModes {
+        Default,
+        VoiceChat,
+        GameChat,
+        VideoRecording,
+        Measurement,
+        MoviePlayback
+    };
+
+    static CoreAudioSessionManager& instance();
+
+    bool setActive(bool active);
+    bool setCategory(AudioSessionCategorys category, AudioSessionCategoryOptions options = None);
+    bool setMode(AudioSessionModes mode);
+
+    AudioSessionCategorys category();
+    AudioSessionModes mode();
+
+    QList<QByteArray> inputDevices();
+    QList<QByteArray> outputDevices();
+
+    int inputChannelCount();
+    int outputChannelCount();
+
+    float currentIOBufferDuration();
+    float preferredSampleRate();
+
+signals:
+    void activeChanged();
+    void categoryChanged();
+    void modeChanged();
+    void routeChanged();
+    void inputDevicesAvailableChanged();
+    void outputDevicesAvailableChanged();
+
+private:
+    CoreAudioSessionManager();
+    ~CoreAudioSessionManager();
+    CoreAudioSessionManager(CoreAudioSessionManager const &copy);
+    CoreAudioSessionManager& operator =(CoreAudioSessionManager const &copy);
+
+    CoreAudioSessionObserver *m_sessionObserver;
+};
+
+#ifdef QT_DEBUG_COREAUDIO
+QDebug operator <<(QDebug dbg, CoreAudioSessionManager::AudioSessionCategorys category);
+QDebug operator <<(QDebug dbg, CoreAudioSessionManager::AudioSessionCategoryOptions option);
+QDebug operator <<(QDebug dbg, CoreAudioSessionManager::AudioSessionModes mode);
+#endif
+
+QT_END_NAMESPACE
+
+Q_DECLARE_METATYPE(CoreAudioSessionManager::AudioSessionCategorys)
+Q_DECLARE_METATYPE(CoreAudioSessionManager::AudioSessionCategoryOptions)
+Q_DECLARE_METATYPE(CoreAudioSessionManager::AudioSessionModes)
+
+#endif // IOSAUDIOSESSIONMANAGER_H