/**************************************************************************** | |
** | |
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
** All rights reserved. | |
** Contact: Nokia Corporation (qt-info@nokia.com) | |
** | |
** This file is part of the QtMultimedia module of the Qt Toolkit. | |
** | |
** $QT_BEGIN_LICENSE:LGPL$ | |
** GNU Lesser General Public License Usage | |
** 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, Nokia gives you certain additional | |
** rights. These rights are described in the Nokia 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. | |
** | |
** Other Usage | |
** Alternatively, this file may be used in accordance with the terms and | |
** conditions contained in a signed written agreement between you and Nokia. | |
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** $QT_END_LICENSE$ | |
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****************************************************************************/ | |
// | |
// W A R N I N G | |
// ------------- | |
// | |
// This file is not part of the Qt API. It exists for the convenience | |
// of other Qt classes. This header file may change from version to | |
// version without notice, or even be removed. | |
// | |
// We mean it. | |
// | |
#ifndef QAUDIOOUTPUT_SYMBIAN_P_H | |
#define QAUDIOOUTPUT_SYMBIAN_P_H | |
#include <QtMultimedia/qaudioengine.h> | |
#include <QTime> | |
#include <QTimer> | |
#include <sounddevice.h> | |
#include "qaudio_symbian_p.h" | |
QT_BEGIN_NAMESPACE | |
class QAudioOutputPrivate; | |
class SymbianAudioOutputPrivate : public QIODevice | |
{ | |
friend class QAudioOutputPrivate; | |
Q_OBJECT | |
public: | |
SymbianAudioOutputPrivate(QAudioOutputPrivate *audio); | |
~SymbianAudioOutputPrivate(); | |
qint64 readData(char *data, qint64 len); | |
qint64 writeData(const char *data, qint64 len); | |
private: | |
QAudioOutputPrivate *const m_audioDevice; | |
}; | |
class QAudioOutputPrivate | |
: public QAbstractAudioOutput | |
{ | |
friend class SymbianAudioOutputPrivate; | |
Q_OBJECT | |
public: | |
QAudioOutputPrivate(const QByteArray &device, | |
const QAudioFormat &audioFormat); | |
~QAudioOutputPrivate(); | |
// QAbstractAudioOutput | |
QIODevice* start(QIODevice *device = 0); | |
void stop(); | |
void reset(); | |
void suspend(); | |
void resume(); | |
int bytesFree() const; | |
int periodSize() const; | |
void setBufferSize(int value); | |
int bufferSize() const; | |
void setNotifyInterval(int milliSeconds); | |
int notifyInterval() const; | |
qint64 processedUSecs() const; | |
qint64 elapsedUSecs() const; | |
QAudio::Error error() const; | |
QAudio::State state() const; | |
QAudioFormat format() const; | |
private slots: | |
void dataReady(); | |
void underflowTimerExpired(); | |
void devsoundInitializeComplete(int err); | |
void devsoundBufferToBeFilled(CMMFBuffer *); | |
void devsoundPlayError(int err); | |
private: | |
void open(); | |
void startPlayback(); | |
void writePaddingData(); | |
qint64 pushData(const char *data, qint64 len); | |
void pullData(); | |
void bufferFilled(); | |
void lastBufferFilled(); | |
Q_INVOKABLE void close(); | |
qint64 getSamplesPlayed() const; | |
void setError(QAudio::Error error); | |
void setState(SymbianAudio::State state); | |
bool isDataReady() const; | |
private: | |
const QByteArray m_device; | |
const QAudioFormat m_format; | |
int m_clientBufferSize; | |
int m_notifyInterval; | |
QScopedPointer<QTimer> m_notifyTimer; | |
QTime m_elapsed; | |
QAudio::Error m_error; | |
SymbianAudio::State m_internalState; | |
QAudio::State m_externalState; | |
bool m_pullMode; | |
QIODevice *m_source; | |
SymbianAudio::DevSoundWrapper* m_devSound; | |
// Buffer provided by DevSound, to be filled with data. | |
CMMFDataBuffer *m_devSoundBuffer; | |
int m_devSoundBufferSize; | |
// Number of bytes transferred from QIODevice to QAudioOutput. It is | |
// necessary to count this because data is dropped when suspend() is | |
// called. The difference between the position reported by DevSound and | |
// this value allows us to calculate m_bytesPadding; | |
quint32 m_bytesWritten; | |
// True if client has provided data while the audio subsystem was not | |
// ready to consume it. | |
bool m_pushDataReady; | |
// Number of zero bytes which will be written when client calls resume(). | |
quint32 m_bytesPadding; | |
// True if PlayError(KErrUnderflow) has been called. | |
bool m_underflow; | |
// True if a buffer marked with the "last buffer" flag has been provided | |
// to DevSound. | |
bool m_lastBuffer; | |
// Some DevSound implementations ignore all underflow errors raised by the | |
// audio driver, unless the last buffer flag has been set by the client. | |
// In push-mode playback, this flag will never be set, so the underflow | |
// error will never be reported. In order to work around this, a timer | |
// is used, which gets reset every time the client provides more data. If | |
// the timer expires, an underflow error is raised by this object. | |
QScopedPointer<QTimer> m_underflowTimer; | |
// Result of previous call to CMMFDevSound::SamplesPlayed(). This value is | |
// used to determine whether, when m_underflowTimer expires, an | |
// underflow error has actually occurred. | |
quint32 m_samplesPlayed; | |
// Samples played up to the last call to suspend(). It is necessary | |
// to cache this because suspend() is implemented using | |
// CMMFDevSound::Stop(), which resets DevSound's SamplesPlayed() counter. | |
quint32 m_totalSamplesPlayed; | |
}; | |
QT_END_NAMESPACE | |
#endif |