diff options
Diffstat (limited to 'src/multimedia/audio/qaudiooutput_alsa_p.cpp')
| -rw-r--r-- | src/multimedia/audio/qaudiooutput_alsa_p.cpp | 834 |
1 files changed, 0 insertions, 834 deletions
diff --git a/src/multimedia/audio/qaudiooutput_alsa_p.cpp b/src/multimedia/audio/qaudiooutput_alsa_p.cpp deleted file mode 100644 index 8ef4e28..0000000 --- a/src/multimedia/audio/qaudiooutput_alsa_p.cpp +++ /dev/null @@ -1,834 +0,0 @@ -/**************************************************************************** -** -** 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 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. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -// -// 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. -// -// INTERNAL USE ONLY: Do NOT use for any other purpose. -// - -#include <QtCore/qcoreapplication.h> -#include "qaudiooutput_alsa_p.h" -#include "qaudiodeviceinfo_alsa_p.h" - -QT_BEGIN_NAMESPACE - -//#define DEBUG_AUDIO 1 - -QAudioOutputPrivate::QAudioOutputPrivate(const QByteArray &device) -{ - bytesAvailable = 0; - handle = 0; - ahandler = 0; - access = SND_PCM_ACCESS_RW_INTERLEAVED; - pcmformat = SND_PCM_FORMAT_S16; - buffer_frames = 0; - period_frames = 0; - buffer_size = 0; - period_size = 0; - buffer_time = 100000; - period_time = 20000; - totalTimeValue = 0; - intervalTime = 1000; - audioBuffer = 0; - errorState = QAudio::NoError; - deviceState = QAudio::StoppedState; - audioSource = 0; - pullMode = true; - 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*> - (snd_async_handler_get_callback_private(ahandler)); - - if((audioOut->deviceState==QAudio::ActiveState)||(audioOut->resuming)) - 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){ - usleep(100); - count++; - if(count > 5) { - reset = true; - break; - } - } - if(err < 0) { - err = snd_pcm_prepare(handle); - if(err < 0) - reset = true; - } - } - if(reset) { - close(); - open(); - snd_pcm_prepare(handle); - return 0; - } - return err; -} - -int QAudioOutputPrivate::setFormat() -{ - snd_pcm_format_t pcmformat = SND_PCM_FORMAT_UNKNOWN; - - if(settings.sampleSize() == 8) { - pcmformat = SND_PCM_FORMAT_U8; - - } else if(settings.sampleSize() == 16) { - if(settings.sampleType() == QAudioFormat::SignedInt) { - if(settings.byteOrder() == QAudioFormat::LittleEndian) - pcmformat = SND_PCM_FORMAT_S16_LE; - else - pcmformat = SND_PCM_FORMAT_S16_BE; - } else if(settings.sampleType() == QAudioFormat::UnSignedInt) { - if(settings.byteOrder() == QAudioFormat::LittleEndian) - pcmformat = SND_PCM_FORMAT_U16_LE; - else - 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 - 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" |