Initial copy of QtMultimediaKit.
Comes from original repo, with SHA1: 2c82d5611655e5967f5c5095af50c0991c4378b2
This commit is contained in:
Michael Goddard
834
src/multimediakit/audio/qaudiooutput_alsa_p.cpp
Normal file
834
src/multimediakit/audio/qaudiooutput_alsa_p.cpp
Normal file
@@ -0,0 +1,834 @@
|
||||
/****************************************************************************
|
||||
**
|
||||
** 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 Qt Mobility Components.
|
||||
**
|
||||
** $QT_BEGIN_LICENSE:LGPL$
|
||||
** 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.
|
||||
**
|
||||
**
|
||||
**
|
||||
**
|
||||
**
|
||||
** $QT_END_LICENSE$
|
||||
**
|
||||
****************************************************************************/
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||||
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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.
|
||||
//
|
||||
// INTERNAL USE ONLY: Do NOT use for any other purpose.
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||||
//
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#include <QtCore/qcoreapplication.h>
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#include "qaudiooutput_alsa_p.h"
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#include "qaudiodeviceinfo_alsa_p.h"
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QT_BEGIN_NAMESPACE
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|
||||
//#define DEBUG_AUDIO 1
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||||
QAudioOutputPrivate::QAudioOutputPrivate(const QByteArray &device)
|
||||
{
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||||
bytesAvailable = 0;
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||||
handle = 0;
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ahandler = 0;
|
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access = SND_PCM_ACCESS_RW_INTERLEAVED;
|
||||
pcmformat = SND_PCM_FORMAT_S16;
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buffer_frames = 0;
|
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period_frames = 0;
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||||
buffer_size = 0;
|
||||
period_size = 0;
|
||||
buffer_time = 100000;
|
||||
period_time = 20000;
|
||||
totalTimeValue = 0;
|
||||
intervalTime = 1000;
|
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audioBuffer = 0;
|
||||
errorState = QAudio::NoError;
|
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deviceState = QAudio::StoppedState;
|
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audioSource = 0;
|
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pullMode = true;
|
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resuming = false;
|
||||
opened = false;
|
||||
|
||||
m_device = device;
|
||||
|
||||
timer = new QTimer(this);
|
||||
connect(timer,SIGNAL(timeout()),SLOT(userFeed()));
|
||||
}
|
||||
|
||||
QAudioOutputPrivate::~QAudioOutputPrivate()
|
||||
{
|
||||
close();
|
||||
disconnect(timer, SIGNAL(timeout()));
|
||||
QCoreApplication::processEvents();
|
||||
delete timer;
|
||||
}
|
||||
|
||||
QAudio::Error QAudioOutputPrivate::error() const
|
||||
{
|
||||
return errorState;
|
||||
}
|
||||
|
||||
QAudio::State QAudioOutputPrivate::state() const
|
||||
{
|
||||
return deviceState;
|
||||
}
|
||||
|
||||
void QAudioOutputPrivate::async_callback(snd_async_handler_t *ahandler)
|
||||
{
|
||||
QAudioOutputPrivate* audioOut;
|
||||
|
||||
audioOut = static_cast<QAudioOutputPrivate*>
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||||
(snd_async_handler_get_callback_private(ahandler));
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||||
|
||||
if((audioOut->deviceState==QAudio::ActiveState)||(audioOut->resuming))
|
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audioOut->feedback();
|
||||
}
|
||||
|
||||
int QAudioOutputPrivate::xrun_recovery(int err)
|
||||
{
|
||||
int count = 0;
|
||||
bool reset = false;
|
||||
|
||||
if(err == -EPIPE) {
|
||||
errorState = QAudio::UnderrunError;
|
||||
emit errorChanged(errorState);
|
||||
err = snd_pcm_prepare(handle);
|
||||
if(err < 0)
|
||||
reset = true;
|
||||
|
||||
} else if((err == -ESTRPIPE)||(err == -EIO)) {
|
||||
errorState = QAudio::IOError;
|
||||
emit errorChanged(errorState);
|
||||
while((err = snd_pcm_resume(handle)) == -EAGAIN){
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||||
usleep(100);
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||||
count++;
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||||
if(count > 5) {
|
||||
reset = true;
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||||
break;
|
||||
}
|
||||
}
|
||||
if(err < 0) {
|
||||
err = snd_pcm_prepare(handle);
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||||
if(err < 0)
|
||||
reset = true;
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||||
}
|
||||
}
|
||||
if(reset) {
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||||
close();
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open();
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snd_pcm_prepare(handle);
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return 0;
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}
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return err;
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||||
}
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int QAudioOutputPrivate::setFormat()
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{
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snd_pcm_format_t pcmformat = SND_PCM_FORMAT_UNKNOWN;
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|
||||
if(settings.sampleSize() == 8) {
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pcmformat = SND_PCM_FORMAT_U8;
|
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|
||||
} else if(settings.sampleSize() == 16) {
|
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if(settings.sampleType() == QAudioFormat::SignedInt) {
|
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if(settings.byteOrder() == QAudioFormat::LittleEndian)
|
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pcmformat = SND_PCM_FORMAT_S16_LE;
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else
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pcmformat = SND_PCM_FORMAT_S16_BE;
|
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} else if(settings.sampleType() == QAudioFormat::UnSignedInt) {
|
||||
if(settings.byteOrder() == QAudioFormat::LittleEndian)
|
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pcmformat = SND_PCM_FORMAT_U16_LE;
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||||
else
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pcmformat = SND_PCM_FORMAT_U16_BE;
|
||||
}
|
||||
} else if(settings.sampleSize() == 24) {
|
||||
if(settings.sampleType() == QAudioFormat::SignedInt) {
|
||||
if(settings.byteOrder() == QAudioFormat::LittleEndian)
|
||||
pcmformat = SND_PCM_FORMAT_S24_LE;
|
||||
else
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pcmformat = SND_PCM_FORMAT_S24_BE;
|
||||
} else if(settings.sampleType() == QAudioFormat::UnSignedInt) {
|
||||
if(settings.byteOrder() == QAudioFormat::LittleEndian)
|
||||
pcmformat = SND_PCM_FORMAT_U24_LE;
|
||||
else
|
||||
pcmformat = SND_PCM_FORMAT_U24_BE;
|
||||
}
|
||||
} else if(settings.sampleSize() == 32) {
|
||||
if(settings.sampleType() == QAudioFormat::SignedInt) {
|
||||
if(settings.byteOrder() == QAudioFormat::LittleEndian)
|
||||
pcmformat = SND_PCM_FORMAT_S32_LE;
|
||||
else
|
||||
pcmformat = SND_PCM_FORMAT_S32_BE;
|
||||
} else if(settings.sampleType() == QAudioFormat::UnSignedInt) {
|
||||
if(settings.byteOrder() == QAudioFormat::LittleEndian)
|
||||
pcmformat = SND_PCM_FORMAT_U32_LE;
|
||||
else
|
||||
pcmformat = SND_PCM_FORMAT_U32_BE;
|
||||
} else if(settings.sampleType() == QAudioFormat::Float) {
|
||||
if(settings.byteOrder() == QAudioFormat::LittleEndian)
|
||||
pcmformat = SND_PCM_FORMAT_FLOAT_LE;
|
||||
else
|
||||
pcmformat = SND_PCM_FORMAT_FLOAT_BE;
|
||||
}
|
||||
} else if(settings.sampleSize() == 64) {
|
||||
if(settings.byteOrder() == QAudioFormat::LittleEndian)
|
||||
pcmformat = SND_PCM_FORMAT_FLOAT64_LE;
|
||||
else
|
||||
pcmformat = SND_PCM_FORMAT_FLOAT64_BE;
|
||||
}
|
||||
|
||||
return pcmformat != SND_PCM_FORMAT_UNKNOWN
|
||||
? snd_pcm_hw_params_set_format( handle, hwparams, pcmformat)
|
||||
: -1;
|
||||
}
|
||||
|
||||
void QAudioOutputPrivate::start(QIODevice* device)
|
||||
{
|
||||
if(deviceState != QAudio::StoppedState)
|
||||
deviceState = QAudio::StoppedState;
|
||||
|
||||
errorState = QAudio::NoError;
|
||||
|
||||
// Handle change of mode
|
||||
if(audioSource && !pullMode) {
|
||||
delete audioSource;
|
||||
audioSource = 0;
|
||||
}
|
||||
|
||||
close();
|
||||
|
||||
pullMode = true;
|
||||
audioSource = device;
|
||||
|
||||
deviceState = QAudio::ActiveState;
|
||||
|
||||
open();
|
||||
|
||||
emit stateChanged(deviceState);
|
||||
}
|
||||
|
||||
QIODevice* QAudioOutputPrivate::start()
|
||||
{
|
||||
if(deviceState != QAudio::StoppedState)
|
||||
deviceState = QAudio::StoppedState;
|
||||
|
||||
errorState = QAudio::NoError;
|
||||
|
||||
// Handle change of mode
|
||||
if(audioSource && !pullMode) {
|
||||
delete audioSource;
|
||||
audioSource = 0;
|
||||
}
|
||||
|
||||
close();
|
||||
|
||||
audioSource = new OutputPrivate(this);
|
||||
audioSource->open(QIODevice::WriteOnly|QIODevice::Unbuffered);
|
||||
pullMode = false;
|
||||
|
||||
deviceState = QAudio::IdleState;
|
||||
|
||||
open();
|
||||
|
||||
emit stateChanged(deviceState);
|
||||
|
||||
return audioSource;
|
||||
}
|
||||
|
||||
void QAudioOutputPrivate::stop()
|
||||
{
|
||||
if(deviceState == QAudio::StoppedState)
|
||||
return;
|
||||
errorState = QAudio::NoError;
|
||||
deviceState = QAudio::StoppedState;
|
||||
close();
|
||||
emit stateChanged(deviceState);
|
||||
}
|
||||
|
||||
bool QAudioOutputPrivate::open()
|
||||
{
|
||||
if(opened)
|
||||
return true;
|
||||
|
||||
#ifdef DEBUG_AUDIO
|
||||
QTime now(QTime::currentTime());
|
||||
qDebug()<<now.second()<<"s "<<now.msec()<<"ms :open()";
|
||||
#endif
|
||||
timeStamp.restart();
|
||||
elapsedTimeOffset = 0;
|
||||
|
||||
int dir;
|
||||
int err = 0;
|
||||
int count=0;
|
||||
unsigned int freakuency=settings.frequency();
|
||||
|
||||
if (!settings.isValid()) {
|
||||
qWarning("QAudioOutput: open error, invalid format.");
|
||||
} else if (settings.sampleRate() <= 0) {
|
||||
qWarning("QAudioOutput: open error, invalid sample rate (%d).",
|
||||
settings.sampleRate());
|
||||
} else {
|
||||
err = -1;
|
||||
}
|
||||
|
||||
if (err == 0) {
|
||||
errorState = QAudio::OpenError;
|
||||
deviceState = QAudio::StoppedState;
|
||||
emit errorChanged(errorState);
|
||||
return false;
|
||||
}
|
||||
|
||||
QString dev = QString(QLatin1String(m_device.constData()));
|
||||
QList<QByteArray> devices = QAudioDeviceInfoInternal::availableDevices(QAudio::AudioOutput);
|
||||
if(dev.compare(QLatin1String("default")) == 0) {
|
||||
#if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
|
||||
if (devices.size() > 0)
|
||||
dev = QLatin1String(devices.first());
|
||||
else
|
||||
return false;
|
||||
#else
|
||||
dev = QLatin1String("hw:0,0");
|
||||
#endif
|
||||
} else {
|
||||
#if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
|
||||
dev = QLatin1String(m_device);
|
||||
#else
|
||||
int idx = 0;
|
||||
char *name;
|
||||
|
||||
QString shortName = QLatin1String(m_device.mid(m_device.indexOf('=',0)+1).constData());
|
||||
|
||||
while(snd_card_get_name(idx,&name) == 0) {
|
||||
if(qstrncmp(shortName.toLocal8Bit().constData(),name,shortName.length()) == 0)
|
||||
break;
|
||||
idx++;
|
||||
}
|
||||
dev = QString(QLatin1String("hw:%1,0")).arg(idx);
|
||||
#endif
|
||||
}
|
||||
|
||||
// Step 1: try and open the device
|
||||
while((count < 5) && (err < 0)) {
|
||||
err=snd_pcm_open(&handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_PLAYBACK,0);
|
||||
if(err < 0)
|
||||
count++;
|
||||
}
|
||||
if (( err < 0)||(handle == 0)) {
|
||||
errorState = QAudio::OpenError;
|
||||
emit errorChanged(errorState);
|
||||
deviceState = QAudio::StoppedState;
|
||||
return false;
|
||||
}
|
||||
snd_pcm_nonblock( handle, 0 );
|
||||
|
||||
// Step 2: Set the desired HW parameters.
|
||||
snd_pcm_hw_params_alloca( &hwparams );
|
||||
|
||||
bool fatal = false;
|
||||
QString errMessage;
|
||||
unsigned int chunks = 8;
|
||||
|
||||
err = snd_pcm_hw_params_any( handle, hwparams );
|
||||
if ( err < 0 ) {
|
||||
fatal = true;
|
||||
errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_any: err = %1").arg(err);
|
||||
}
|
||||
if ( !fatal ) {
|
||||
err = snd_pcm_hw_params_set_rate_resample( handle, hwparams, 1 );
|
||||
if ( err < 0 ) {
|
||||
fatal = true;
|
||||
errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_rate_resample: err = %1").arg(err);
|
||||
}
|
||||
}
|
||||
if ( !fatal ) {
|
||||
err = snd_pcm_hw_params_set_access( handle, hwparams, access );
|
||||
if ( err < 0 ) {
|
||||
fatal = true;
|
||||
errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_access: err = %1").arg(err);
|
||||
}
|
||||
}
|
||||
if ( !fatal ) {
|
||||
err = setFormat();
|
||||
if ( err < 0 ) {
|
||||
fatal = true;
|
||||
errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_format: err = %1").arg(err);
|
||||
}
|
||||
}
|
||||
if ( !fatal ) {
|
||||
err = snd_pcm_hw_params_set_channels( handle, hwparams, (unsigned int)settings.channels() );
|
||||
if ( err < 0 ) {
|
||||
fatal = true;
|
||||
errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_channels: err = %1").arg(err);
|
||||
}
|
||||
}
|
||||
if ( !fatal ) {
|
||||
err = snd_pcm_hw_params_set_rate_near( handle, hwparams, &freakuency, 0 );
|
||||
if ( err < 0 ) {
|
||||
fatal = true;
|
||||
errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_rate_near: err = %1").arg(err);
|
||||
}
|
||||
}
|
||||
if ( !fatal ) {
|
||||
unsigned int maxBufferTime = 0;
|
||||
unsigned int minBufferTime = 0;
|
||||
unsigned int maxPeriodTime = 0;
|
||||
unsigned int minPeriodTime = 0;
|
||||
|
||||
err = snd_pcm_hw_params_get_buffer_time_max(hwparams, &maxBufferTime, &dir);
|
||||
if ( err >= 0)
|
||||
err = snd_pcm_hw_params_get_buffer_time_min(hwparams, &minBufferTime, &dir);
|
||||
if ( err >= 0)
|
||||
err = snd_pcm_hw_params_get_period_time_max(hwparams, &maxPeriodTime, &dir);
|
||||
if ( err >= 0)
|
||||
err = snd_pcm_hw_params_get_period_time_min(hwparams, &minPeriodTime, &dir);
|
||||
|
||||
if ( err < 0 ) {
|
||||
fatal = true;
|
||||
errMessage = QString::fromLatin1("QAudioOutput: buffer/period min and max: err = %1").arg(err);
|
||||
} else {
|
||||
if (maxBufferTime < buffer_time || buffer_time < minBufferTime || maxPeriodTime < period_time || minPeriodTime > period_time) {
|
||||
#ifdef DEBUG_AUDIO
|
||||
qDebug()<<"defaults out of range";
|
||||
qDebug()<<"pmin="<<minPeriodTime<<", pmax="<<maxPeriodTime<<", bmin="<<minBufferTime<<", bmax="<<maxBufferTime;
|
||||
#endif
|
||||
period_time = minPeriodTime;
|
||||
if (period_time*4 <= maxBufferTime) {
|
||||
// Use 4 periods if possible
|
||||
buffer_time = period_time*4;
|
||||
chunks = 4;
|
||||
} else if (period_time*2 <= maxBufferTime) {
|
||||
// Use 2 periods if possible
|
||||
buffer_time = period_time*2;
|
||||
chunks = 2;
|
||||
} else {
|
||||
qWarning()<<"QAudioOutput: alsa only supports single period!";
|
||||
fatal = true;
|
||||
}
|
||||
#ifdef DEBUG_AUDIO
|
||||
qDebug()<<"used: buffer_time="<<buffer_time<<", period_time="<<period_time;
|
||||
#endif
|
||||
}
|
||||
}
|
||||
}
|
||||
if ( !fatal ) {
|
||||
err = snd_pcm_hw_params_set_buffer_time_near(handle, hwparams, &buffer_time, &dir);
|
||||
if ( err < 0 ) {
|
||||
fatal = true;
|
||||
errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_buffer_time_near: err = %1").arg(err);
|
||||
}
|
||||
}
|
||||
if ( !fatal ) {
|
||||
err = snd_pcm_hw_params_set_period_time_near(handle, hwparams, &period_time, &dir);
|
||||
if ( err < 0 ) {
|
||||
fatal = true;
|
||||
errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_period_time_near: err = %1").arg(err);
|
||||
}
|
||||
}
|
||||
if ( !fatal ) {
|
||||
err = snd_pcm_hw_params_set_periods_near(handle, hwparams, &chunks, &dir);
|
||||
if ( err < 0 ) {
|
||||
fatal = true;
|
||||
errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params_set_periods_near: err = %1").arg(err);
|
||||
}
|
||||
}
|
||||
if ( !fatal ) {
|
||||
err = snd_pcm_hw_params(handle, hwparams);
|
||||
if ( err < 0 ) {
|
||||
fatal = true;
|
||||
errMessage = QString::fromLatin1("QAudioOutput: snd_pcm_hw_params: err = %1").arg(err);
|
||||
}
|
||||
}
|
||||
if( err < 0) {
|
||||
qWarning()<<errMessage;
|
||||
errorState = QAudio::OpenError;
|
||||
emit errorChanged(errorState);
|
||||
deviceState = QAudio::StoppedState;
|
||||
return false;
|
||||
}
|
||||
snd_pcm_hw_params_get_buffer_size(hwparams,&buffer_frames);
|
||||
buffer_size = snd_pcm_frames_to_bytes(handle,buffer_frames);
|
||||
snd_pcm_hw_params_get_period_size(hwparams,&period_frames, &dir);
|
||||
period_size = snd_pcm_frames_to_bytes(handle,period_frames);
|
||||
snd_pcm_hw_params_get_buffer_time(hwparams,&buffer_time, &dir);
|
||||
snd_pcm_hw_params_get_period_time(hwparams,&period_time, &dir);
|
||||
|
||||
// Step 3: Set the desired SW parameters.
|
||||
snd_pcm_sw_params_t *swparams;
|
||||
snd_pcm_sw_params_alloca(&swparams);
|
||||
snd_pcm_sw_params_current(handle, swparams);
|
||||
snd_pcm_sw_params_set_start_threshold(handle,swparams,period_frames);
|
||||
snd_pcm_sw_params_set_stop_threshold(handle,swparams,buffer_frames);
|
||||
snd_pcm_sw_params_set_avail_min(handle, swparams,period_frames);
|
||||
snd_pcm_sw_params(handle, swparams);
|
||||
|
||||
// Step 4: Prepare audio
|
||||
if(audioBuffer == 0)
|
||||
audioBuffer = new char[snd_pcm_frames_to_bytes(handle,buffer_frames)];
|
||||
snd_pcm_prepare( handle );
|
||||
snd_pcm_start(handle);
|
||||
|
||||
// Step 5: Setup callback and timer fallback
|
||||
snd_async_add_pcm_handler(&ahandler, handle, async_callback, this);
|
||||
bytesAvailable = bytesFree();
|
||||
|
||||
// Step 6: Start audio processing
|
||||
timer->start(period_time/1000);
|
||||
|
||||
clockStamp.restart();
|
||||
timeStamp.restart();
|
||||
elapsedTimeOffset = 0;
|
||||
errorState = QAudio::NoError;
|
||||
totalTimeValue = 0;
|
||||
opened = true;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
void QAudioOutputPrivate::close()
|
||||
{
|
||||
timer->stop();
|
||||
|
||||
if ( handle ) {
|
||||
snd_pcm_drain( handle );
|
||||
snd_pcm_close( handle );
|
||||
handle = 0;
|
||||
delete [] audioBuffer;
|
||||
audioBuffer=0;
|
||||
}
|
||||
if(!pullMode && audioSource) {
|
||||
delete audioSource;
|
||||
audioSource = 0;
|
||||
}
|
||||
opened = false;
|
||||
}
|
||||
|
||||
int QAudioOutputPrivate::bytesFree() const
|
||||
{
|
||||
if(resuming)
|
||||
return period_size;
|
||||
|
||||
if(deviceState != QAudio::ActiveState && deviceState != QAudio::IdleState)
|
||||
return 0;
|
||||
|
||||
int frames = snd_pcm_avail_update(handle);
|
||||
if (frames == -EPIPE) {
|
||||
// Try and handle buffer underrun
|
||||
int err = snd_pcm_recover(handle, frames, 0);
|
||||
if (err < 0)
|
||||
return 0;
|
||||
else
|
||||
frames = snd_pcm_avail_update(handle);
|
||||
} else if (frames < 0) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
if ((int)frames > (int)buffer_frames)
|
||||
frames = buffer_frames;
|
||||
|
||||
return snd_pcm_frames_to_bytes(handle, frames);
|
||||
}
|
||||
|
||||
qint64 QAudioOutputPrivate::write( const char *data, qint64 len )
|
||||
{
|
||||
// Write out some audio data
|
||||
if ( !handle )
|
||||
return 0;
|
||||
#ifdef DEBUG_AUDIO
|
||||
qDebug()<<"frames to write out = "<<
|
||||
snd_pcm_bytes_to_frames( handle, (int)len )<<" ("<<len<<") bytes";
|
||||
#endif
|
||||
int frames, err;
|
||||
int space = bytesFree();
|
||||
if(len < space) {
|
||||
// Just write it
|
||||
frames = snd_pcm_bytes_to_frames( handle, (int)len );
|
||||
err = snd_pcm_writei( handle, data, frames );
|
||||
} else {
|
||||
// Only write space worth
|
||||
frames = snd_pcm_bytes_to_frames( handle, (int)space );
|
||||
err = snd_pcm_writei( handle, data, frames );
|
||||
}
|
||||
if(err > 0) {
|
||||
totalTimeValue += err;
|
||||
resuming = false;
|
||||
errorState = QAudio::NoError;
|
||||
if (deviceState != QAudio::ActiveState) {
|
||||
deviceState = QAudio::ActiveState;
|
||||
emit stateChanged(deviceState);
|
||||
}
|
||||
return snd_pcm_frames_to_bytes( handle, err );
|
||||
} else
|
||||
err = xrun_recovery(err);
|
||||
|
||||
if(err < 0) {
|
||||
close();
|
||||
errorState = QAudio::FatalError;
|
||||
emit errorChanged(errorState);
|
||||
deviceState = QAudio::StoppedState;
|
||||
emit stateChanged(deviceState);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int QAudioOutputPrivate::periodSize() const
|
||||
{
|
||||
return period_size;
|
||||
}
|
||||
|
||||
void QAudioOutputPrivate::setBufferSize(int value)
|
||||
{
|
||||
if(deviceState == QAudio::StoppedState)
|
||||
buffer_size = value;
|
||||
}
|
||||
|
||||
int QAudioOutputPrivate::bufferSize() const
|
||||
{
|
||||
return buffer_size;
|
||||
}
|
||||
|
||||
void QAudioOutputPrivate::setNotifyInterval(int ms)
|
||||
{
|
||||
intervalTime = qMax(0, ms);
|
||||
}
|
||||
|
||||
int QAudioOutputPrivate::notifyInterval() const
|
||||
{
|
||||
return intervalTime;
|
||||
}
|
||||
|
||||
qint64 QAudioOutputPrivate::processedUSecs() const
|
||||
{
|
||||
return qint64(1000000) * totalTimeValue / settings.frequency();
|
||||
}
|
||||
|
||||
void QAudioOutputPrivate::resume()
|
||||
{
|
||||
if(deviceState == QAudio::SuspendedState) {
|
||||
int err = 0;
|
||||
|
||||
if(handle) {
|
||||
err = snd_pcm_prepare( handle );
|
||||
if(err < 0)
|
||||
xrun_recovery(err);
|
||||
|
||||
err = snd_pcm_start(handle);
|
||||
if(err < 0)
|
||||
xrun_recovery(err);
|
||||
|
||||
bytesAvailable = (int)snd_pcm_frames_to_bytes(handle, buffer_frames);
|
||||
}
|
||||
resuming = true;
|
||||
|
||||
deviceState = QAudio::ActiveState;
|
||||
|
||||
errorState = QAudio::NoError;
|
||||
timer->start(period_time/1000);
|
||||
emit stateChanged(deviceState);
|
||||
}
|
||||
}
|
||||
|
||||
void QAudioOutputPrivate::setFormat(const QAudioFormat& fmt)
|
||||
{
|
||||
if (deviceState == QAudio::StoppedState)
|
||||
settings = fmt;
|
||||
}
|
||||
|
||||
QAudioFormat QAudioOutputPrivate::format() const
|
||||
{
|
||||
return settings;
|
||||
}
|
||||
|
||||
void QAudioOutputPrivate::suspend()
|
||||
{
|
||||
if(deviceState == QAudio::ActiveState || deviceState == QAudio::IdleState || resuming) {
|
||||
timer->stop();
|
||||
deviceState = QAudio::SuspendedState;
|
||||
errorState = QAudio::NoError;
|
||||
emit stateChanged(deviceState);
|
||||
}
|
||||
}
|
||||
|
||||
void QAudioOutputPrivate::userFeed()
|
||||
{
|
||||
if(deviceState == QAudio::StoppedState || deviceState == QAudio::SuspendedState)
|
||||
return;
|
||||
#ifdef DEBUG_AUDIO
|
||||
QTime now(QTime::currentTime());
|
||||
qDebug()<<now.second()<<"s "<<now.msec()<<"ms :userFeed() OUT";
|
||||
#endif
|
||||
if(deviceState == QAudio::IdleState)
|
||||
bytesAvailable = bytesFree();
|
||||
|
||||
deviceReady();
|
||||
}
|
||||
|
||||
void QAudioOutputPrivate::feedback()
|
||||
{
|
||||
updateAvailable();
|
||||
}
|
||||
|
||||
|
||||
void QAudioOutputPrivate::updateAvailable()
|
||||
{
|
||||
#ifdef DEBUG_AUDIO
|
||||
QTime now(QTime::currentTime());
|
||||
qDebug()<<now.second()<<"s "<<now.msec()<<"ms :updateAvailable()";
|
||||
#endif
|
||||
bytesAvailable = bytesFree();
|
||||
}
|
||||
|
||||
bool QAudioOutputPrivate::deviceReady()
|
||||
{
|
||||
if(pullMode) {
|
||||
int l = 0;
|
||||
int chunks = bytesAvailable/period_size;
|
||||
if(chunks==0) {
|
||||
bytesAvailable = bytesFree();
|
||||
return false;
|
||||
}
|
||||
#ifdef DEBUG_AUDIO
|
||||
qDebug()<<"deviceReady() avail="<<bytesAvailable<<" bytes, period size="<<period_size<<" bytes";
|
||||
qDebug()<<"deviceReady() no. of chunks that can fit ="<<chunks<<", chunks in bytes ="<<period_size*chunks;
|
||||
#endif
|
||||
int input = period_frames*chunks;
|
||||
if(input > (int)buffer_frames)
|
||||
input = buffer_frames;
|
||||
l = audioSource->read(audioBuffer,snd_pcm_frames_to_bytes(handle, input));
|
||||
if(l > 0) {
|
||||
// Got some data to output
|
||||
if(deviceState != QAudio::ActiveState)
|
||||
return true;
|
||||
qint64 bytesWritten = write(audioBuffer,l);
|
||||
if (bytesWritten != l)
|
||||
audioSource->seek(audioSource->pos()-(l-bytesWritten));
|
||||
bytesAvailable = bytesFree();
|
||||
|
||||
} else if(l == 0) {
|
||||
// Did not get any data to output
|
||||
bytesAvailable = bytesFree();
|
||||
if(bytesAvailable > snd_pcm_frames_to_bytes(handle, buffer_frames-period_frames)) {
|
||||
// Underrun
|
||||
if (deviceState != QAudio::IdleState) {
|
||||
errorState = QAudio::UnderrunError;
|
||||
emit errorChanged(errorState);
|
||||
deviceState = QAudio::IdleState;
|
||||
emit stateChanged(deviceState);
|
||||
}
|
||||
}
|
||||
|
||||
} else if(l < 0) {
|
||||
close();
|
||||
deviceState = QAudio::StoppedState;
|
||||
errorState = QAudio::IOError;
|
||||
emit errorChanged(errorState);
|
||||
emit stateChanged(deviceState);
|
||||
}
|
||||
} else {
|
||||
bytesAvailable = bytesFree();
|
||||
if(bytesAvailable > snd_pcm_frames_to_bytes(handle, buffer_frames-period_frames)) {
|
||||
// Underrun
|
||||
if (deviceState != QAudio::IdleState) {
|
||||
errorState = QAudio::UnderrunError;
|
||||
emit errorChanged(errorState);
|
||||
deviceState = QAudio::IdleState;
|
||||
emit stateChanged(deviceState);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if(deviceState != QAudio::ActiveState)
|
||||
return true;
|
||||
|
||||
if(intervalTime && (timeStamp.elapsed() + elapsedTimeOffset) > intervalTime) {
|
||||
emit notify();
|
||||
elapsedTimeOffset = timeStamp.elapsed() + elapsedTimeOffset - intervalTime;
|
||||
timeStamp.restart();
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
qint64 QAudioOutputPrivate::elapsedUSecs() const
|
||||
{
|
||||
if (deviceState == QAudio::StoppedState)
|
||||
return 0;
|
||||
|
||||
return clockStamp.elapsed()*1000;
|
||||
}
|
||||
|
||||
void QAudioOutputPrivate::reset()
|
||||
{
|
||||
if(handle)
|
||||
snd_pcm_reset(handle);
|
||||
|
||||
stop();
|
||||
}
|
||||
|
||||
OutputPrivate::OutputPrivate(QAudioOutputPrivate* audio)
|
||||
{
|
||||
audioDevice = qobject_cast<QAudioOutputPrivate*>(audio);
|
||||
}
|
||||
|
||||
OutputPrivate::~OutputPrivate() {}
|
||||
|
||||
qint64 OutputPrivate::readData( char* data, qint64 len)
|
||||
{
|
||||
Q_UNUSED(data)
|
||||
Q_UNUSED(len)
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
qint64 OutputPrivate::writeData(const char* data, qint64 len)
|
||||
{
|
||||
int retry = 0;
|
||||
qint64 written = 0;
|
||||
if((audioDevice->deviceState == QAudio::ActiveState)
|
||||
||(audioDevice->deviceState == QAudio::IdleState)) {
|
||||
while(written < len) {
|
||||
int chunk = audioDevice->write(data+written,(len-written));
|
||||
if(chunk <= 0)
|
||||
retry++;
|
||||
written+=chunk;
|
||||
if(retry > 10)
|
||||
return written;
|
||||
}
|
||||
}
|
||||
return written;
|
||||
|
||||
}
|
||||
|
||||
QT_END_NAMESPACE
|
||||
|
||||
#include "moc_qaudiooutput_alsa_p.cpp"
|
||||
Reference in New Issue
Block a user