diff options
Diffstat (limited to 'src/multimedia/audio/qaudioinput_alsa_p.cpp')
| -rw-r--r-- | src/multimedia/audio/qaudioinput_alsa_p.cpp | 688 |
1 files changed, 688 insertions, 0 deletions
diff --git a/src/multimedia/audio/qaudioinput_alsa_p.cpp b/src/multimedia/audio/qaudioinput_alsa_p.cpp new file mode 100644 index 0000000..6f00469 --- /dev/null +++ b/src/multimedia/audio/qaudioinput_alsa_p.cpp @@ -0,0 +1,688 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** 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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, 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. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at http://www.qtsoftware.com/contact. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +// +// 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. +// + +#include <QtCore/qcoreapplication.h> +#include "qaudioinput_alsa_p.h" + +//#define DEBUG_AUDIO 1 + +QAudioInputPrivate::QAudioInputPrivate(const QByteArray &device, const QAudioFormat& audioFormat): + settings(audioFormat) +{ + bytesAvailable = 0; + handle = 0; + ahandler = 0; + access = SND_PCM_ACCESS_RW_INTERLEAVED; + pcmformat = SND_PCM_FORMAT_S16; + buffer_size = 0; + period_size = 0; + buffer_time = 100000; + period_time = 20000; + totalTimeValue = 0; + intervalTime = 1000; + audioBuffer = 0; + errorState = QAudio::NoError; + deviceState = QAudio::StopState; + audioSource = 0; + pullMode = true; + resuming = false; + + QStringList list1 = QString(tr(device)).split(tr(":")); + m_device = QByteArray(list1.at(0).toLocal8Bit().constData()); + + timer = new QTimer(this); + connect(timer,SIGNAL(timeout()),SLOT(userFeed())); +} + +QAudioInputPrivate::~QAudioInputPrivate() +{ + close(); + disconnect(timer, SIGNAL(timeout())); + QCoreApplication::processEvents(); + delete timer; +} + +QAudio::Error QAudioInputPrivate::error() const +{ + return errorState; +} + +QAudio::State QAudioInputPrivate::state() const +{ + return deviceState; +} + + +QAudioFormat QAudioInputPrivate::format() const +{ + return settings; +} + +int QAudioInputPrivate::xrun_recovery(int err) +{ + int count = 0; + bool reset = false; + + if(err == -EPIPE) { + errorState = QAudio::UnderrunError; + err = snd_pcm_prepare(handle); + if(err < 0) + reset = true; + + } else if((err == -ESTRPIPE)||(err == -EIO)) { + errorState = QAudio::IOError; + 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 QAudioInputPrivate::setFormat() +{ + snd_pcm_format_t format = SND_PCM_FORMAT_S16; + + if(settings.sampleSize() == 8) { + format = SND_PCM_FORMAT_U8; + } else if(settings.sampleSize() == 16) { + if(settings.sampleType() == QAudioFormat::SignedInt) { + if(settings.byteOrder() == QAudioFormat::LittleEndian) + format = SND_PCM_FORMAT_S16_LE; + else + format = SND_PCM_FORMAT_S16_BE; + } else if(settings.sampleType() == QAudioFormat::UnSignedInt) { + if(settings.byteOrder() == QAudioFormat::LittleEndian) + format = SND_PCM_FORMAT_U16_LE; + else + format = SND_PCM_FORMAT_U16_BE; + } + } else if(settings.sampleSize() == 24) { + if(settings.sampleType() == QAudioFormat::SignedInt) { + if(settings.byteOrder() == QAudioFormat::LittleEndian) + format = SND_PCM_FORMAT_S24_LE; + else + format = SND_PCM_FORMAT_S24_BE; + } else if(settings.sampleType() == QAudioFormat::UnSignedInt) { + if(settings.byteOrder() == QAudioFormat::LittleEndian) + format = SND_PCM_FORMAT_U24_LE; + else + format = SND_PCM_FORMAT_U24_BE; + } + } else if(settings.sampleSize() == 32) { + if(settings.sampleType() == QAudioFormat::SignedInt) { + if(settings.byteOrder() == QAudioFormat::LittleEndian) + format = SND_PCM_FORMAT_S32_LE; + else + format = SND_PCM_FORMAT_S32_BE; + } else if(settings.sampleType() == QAudioFormat::UnSignedInt) { + if(settings.byteOrder() == QAudioFormat::LittleEndian) + format = SND_PCM_FORMAT_U32_LE; + else + format = SND_PCM_FORMAT_U32_BE; + } else if(settings.sampleType() == QAudioFormat::Float) { + if(settings.byteOrder() == QAudioFormat::LittleEndian) + format = SND_PCM_FORMAT_FLOAT_LE; + else + format = SND_PCM_FORMAT_FLOAT_BE; + } + } else if(settings.sampleSize() == 64) { + if(settings.byteOrder() == QAudioFormat::LittleEndian) + format = SND_PCM_FORMAT_FLOAT64_LE; + else + format = SND_PCM_FORMAT_FLOAT64_BE; + } + + return snd_pcm_hw_params_set_format( handle, hwparams, format); +} + +QIODevice* QAudioInputPrivate::start(QIODevice* device) +{ + if(deviceState != QAudio::StopState) + close(); + + if(!pullMode && audioSource) { + delete audioSource; + } + + if(device) { + //set to pull mode + pullMode = true; + audioSource = device; + } else { + //set to push mode + pullMode = false; + audioSource = new InputPrivate(this); + audioSource->open(QIODevice::ReadOnly | QIODevice::Unbuffered); + } + + if( !open() ) + return 0; + + emit stateChanged(deviceState); + + return audioSource; +} + +void QAudioInputPrivate::stop() +{ + if(deviceState == QAudio::StopState) + return; + + deviceState = QAudio::StopState; + + close(); + emit stateChanged(deviceState); +} + +bool QAudioInputPrivate::open() +{ +#ifdef DEBUG_AUDIO + QTime now(QTime::currentTime()); + qDebug()<<now.second()<<"s "<<now.msec()<<"ms :open()"; +#endif + timeStamp.restart(); + + int dir; + int err=-1; + int count=0; + unsigned int freakuency=settings.frequency(); + + QString dev = QString(tr(m_device.constData())); + if(!dev.contains(tr("default"))) { + dev = QString(tr("default:CARD=%1")).arg(tr(m_device.constData())); + } + + // Step 1: try and open the device + while((count < 5) && (err < 0)) { + err=snd_pcm_open(&handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_CAPTURE,0); + if(err < 0) + count++; + } + if (( err < 0)||(handle == 0)) { + errorState = QAudio::OpenError; + deviceState = QAudio::StopState; + emit stateChanged(deviceState); + 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(tr("QAudioInput: 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(tr("QAudioInput: 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(tr("QAudioInput: snd_pcm_hw_params_set_access: err = %1")).arg(err); + } + } + if ( !fatal ) { + err = setFormat(); + if ( err < 0 ) { + fatal = true; + errMessage = QString(tr("QAudioInput: 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(tr("QAudioInput: 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(tr("QAudioInput: snd_pcm_hw_params_set_rate_near: err = %1")).arg(err); + } + } + if ( !fatal ) { + err = snd_pcm_hw_params_set_buffer_time_near(handle, hwparams, &buffer_time, &dir); + if ( err < 0 ) { + fatal = true; + errMessage = QString(tr("QAudioInput: 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(tr("QAudioInput: 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(tr("QAudioInput: 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(tr("QAudioInput: snd_pcm_hw_params: err = %1")).arg(err); + } + } + if( err < 0) { + qWarning()<<errMessage; + errorState = QAudio::OpenError; + deviceState = QAudio::StopState; + emit stateChanged(deviceState); + 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[buffer_size]; + snd_pcm_prepare( handle ); + snd_pcm_start(handle); + + // Step 5: Setup timer + bytesAvailable = bytesReady(); + + if(pullMode) + connect(audioSource,SIGNAL(readyRead()),this,SLOT(userFeed())); + + // Step 6: Start audio processing + chunks = buffer_size/period_size; + timer->start(period_time*chunks/2000); + + errorState = QAudio::NoError; + deviceState = QAudio::ActiveState; + + totalTimeValue = 0; + + return true; +} + +void QAudioInputPrivate::close() +{ + deviceState = QAudio::StopState; + timer->stop(); + + if ( handle ) { + snd_pcm_drop( handle ); + snd_pcm_close( handle ); + handle = 0; + delete [] audioBuffer; + audioBuffer=0; + } +} + +int QAudioInputPrivate::bytesReady() const +{ + if(resuming) + return period_size; + + if(deviceState != QAudio::ActiveState) + return 0; + int frames = snd_pcm_avail_update(handle); + if((int)frames > (int)buffer_frames) + frames = buffer_frames; + + return snd_pcm_frames_to_bytes(handle, frames); +} + +qint64 QAudioInputPrivate::read(char* data, qint64 len) +{ + Q_UNUSED(data) + Q_UNUSED(len) + // Read in some audio data and write it to QIODevice, pull mode + if ( !handle ) + return 0; + + bytesAvailable = bytesReady(); + + int count=0, err = 0; + while(count < 5) { + int chunks = bytesAvailable/period_size; + int frames = chunks*period_frames; + if(frames > (int)buffer_frames) + frames = buffer_frames; + int readFrames = snd_pcm_readi(handle, audioBuffer, frames); + if (readFrames >= 0) { + err = snd_pcm_frames_to_bytes(handle, readFrames); +#ifdef DEBUG_AUDIO + qDebug()<<QString(tr("PULL: read in bytes = %1 (frames=%2)")).arg(err).arg(readFrames).toLatin1().constData(); +#endif + break; + } else if((readFrames == -EAGAIN) || (readFrames == -EINTR)) { + errorState = QAudio::IOError; + err = 0; + break; + } else { + if(readFrames == -EPIPE) { + errorState = QAudio::UnderrunError; + err = snd_pcm_prepare(handle); + } else if(readFrames == -ESTRPIPE) { + err = snd_pcm_prepare(handle); + } + if(err != 0) break; + } + count++; + } + if(err > 0) { + // got some send it onward +#ifdef DEBUG_AUDIO + qDebug()<<"PULL: frames to write to QIODevice = "<< + snd_pcm_bytes_to_frames( handle, (int)err )<<" ("<<err<<") bytes"; +#endif + if(deviceState != QAudio::ActiveState) + return 0; + + qint64 l = audioSource->write(audioBuffer,err); + if(l < 0) { + close(); + errorState = QAudio::IOError; + deviceState = QAudio::StopState; + emit stateChanged(deviceState); + } else if(l == 0) { + errorState = QAudio::NoError; + deviceState = QAudio::IdleState; + } else { + totalTimeValue += snd_pcm_bytes_to_frames(handle, err)*1000000/settings.frequency(); + resuming = false; + errorState = QAudio::NoError; + deviceState = QAudio::ActiveState; + } + return l; + } + return 0; +} + +void QAudioInputPrivate::resume() +{ + if(deviceState == QAudio::SuspendState) { + 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 = buffer_size; + } + resuming = true; + deviceState = QAudio::ActiveState; + int chunks = buffer_size/period_size; + timer->start(buffer_time*chunks/2000); + emit stateChanged(deviceState); + } +} + +void QAudioInputPrivate::setBufferSize(int value) +{ + buffer_size = value; +} + +int QAudioInputPrivate::bufferSize() const +{ + return buffer_size; +} + +int QAudioInputPrivate::periodSize() const +{ + return period_size; +} + +void QAudioInputPrivate::setNotifyInterval(int ms) +{ + intervalTime = ms; +} + +int QAudioInputPrivate::notifyInterval() const +{ + return intervalTime; +} + +qint64 QAudioInputPrivate::totalTime() const +{ + return totalTimeValue; +} + +void QAudioInputPrivate::suspend() +{ + if(deviceState == QAudio::ActiveState||resuming) { + timer->stop(); + deviceState = QAudio::SuspendState; + emit stateChanged(deviceState); + } +} + +void QAudioInputPrivate::userFeed() +{ + if(deviceState == QAudio::StopState || deviceState == QAudio::SuspendState) + return; +#ifdef DEBUG_AUDIO + QTime now(QTime::currentTime()); + qDebug()<<now.second()<<"s "<<now.msec()<<"ms :userFeed() IN"; +#endif + deviceReady(); +} + +bool QAudioInputPrivate::deviceReady() +{ + if(pullMode) { + // reads some audio data and writes it to QIODevice + read(0,0); + } else { + // emits readyRead() so user will call read() on QIODevice to get some audio data + InputPrivate* a = qobject_cast<InputPrivate*>(audioSource); + a->trigger(); + } + bytesAvailable = bytesReady(); + + if(deviceState != QAudio::ActiveState) + return true; + + if(timeStamp.elapsed() > intervalTime && intervalTime > 50) { + emit notify(); + timeStamp.restart(); + } + return true; +} + +qint64 QAudioInputPrivate::clock() const +{ + if(!handle) + return 0; + + if(deviceState != QAudio::ActiveState) + return 0; + + snd_pcm_status_t* status; + snd_pcm_status_alloca(&status); + + snd_timestamp_t t1,t2; + if( snd_pcm_status(handle, status) >= 0) { + snd_pcm_status_get_tstamp(status,&t1); + snd_pcm_status_get_trigger_tstamp(status,&t2); + t1.tv_sec-=t2.tv_sec; + + signed long l = (signed long)t1.tv_usec - (signed long)t2.tv_usec; + if(l < 0) { + t1.tv_sec--; + l = -l; + l %= 1000000; + } + return ((t1.tv_sec * 1000)+l/1000); + } else + return 0; +} + +void QAudioInputPrivate::reset() +{ + if(handle) + snd_pcm_reset(handle); +} + +void QAudioInputPrivate::drain() +{ + if(handle) + snd_pcm_drain(handle); +} + +InputPrivate::InputPrivate(QAudioInputPrivate* audio) +{ + audioDevice = qobject_cast<QAudioInputPrivate*>(audio); +} + +InputPrivate::~InputPrivate() +{ +} + +qint64 InputPrivate::readData( char* data, qint64 len) +{ + // push mode, user read() called + if((audioDevice->state() != QAudio::ActiveState) && !audioDevice->resuming) + return 0; + + int readFrames; + int count=0, err = 0; + + while(count < 5) { + int frames = snd_pcm_bytes_to_frames(audioDevice->handle, len); + readFrames = snd_pcm_readi(audioDevice->handle, data, frames); + if (readFrames >= 0) { + err = snd_pcm_frames_to_bytes(audioDevice->handle, readFrames); +#ifdef DEBUG_AUDIO + qDebug()<<QString(tr("PUSH: read in bytes = %1 (frames=%2)")).arg(err).arg(readFrames).toLatin1().constData(); +#endif + break; + } else if((readFrames == -EAGAIN) || (readFrames == -EINTR)) { + audioDevice->errorState = QAudio::IOError; + err = 0; + break; + } else { + if(readFrames == -EPIPE) { + audioDevice->errorState = QAudio::UnderrunError; + err = snd_pcm_prepare(audioDevice->handle); + } else if(readFrames == -ESTRPIPE) { + err = snd_pcm_prepare(audioDevice->handle); + } + if(err != 0) break; + } + count++; + } + if(err > 0 && readFrames > 0) { + audioDevice->totalTimeValue += readFrames*1000/audioDevice->settings.frequency()*1000; + audioDevice->deviceState = QAudio::ActiveState; + return err; + } + return 0; +} + +qint64 InputPrivate::writeData(const char* data, qint64 len) +{ + Q_UNUSED(data) + Q_UNUSED(len) + return 0; +} + +void InputPrivate::trigger() +{ + emit readyRead(); +} + |