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Diffstat (limited to 'src/multimedia/audio/qaudiooutput_symbian_p.h')
| -rw-r--r-- | src/multimedia/audio/qaudiooutput_symbian_p.h | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/src/multimedia/audio/qaudiooutput_symbian_p.h b/src/multimedia/audio/qaudiooutput_symbian_p.h new file mode 100644 index 0000000..00ccb24 --- /dev/null +++ b/src/multimedia/audio/qaudiooutput_symbian_p.h @@ -0,0 +1,210 @@ +/**************************************************************************** +** +** Copyright (C) 2010 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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, 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. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +// +// 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 + , public MDevSoundObserver +{ + 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; + + // MDevSoundObserver + void InitializeComplete(TInt aError); + void ToneFinished(TInt aError); + void BufferToBeFilled(CMMFBuffer *aBuffer); + void PlayError(TInt aError); + void BufferToBeEmptied(CMMFBuffer *aBuffer); + void RecordError(TInt aError); + void ConvertError(TInt aError); + void DeviceMessage(TUid aMessageType, const TDesC8 &aMsg); + +private slots: + void dataReady(); + void underflowTimerExpired(); + +private: + void open(); + void startPlayback(); + void startDevSoundL(); + 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; + QAudio::State initializingState() 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; + + QScopedPointer<CMMFDevSound> m_devSound; + TUint32 m_nativeFourCC; + TMMFCapabilities m_nativeFormat; + + // 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 |