--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/qtmobility/src/multimedia/audio/qaudioinput_alsa_p.cpp Wed Jun 23 19:08:38 2010 +0300
@@ -0,0 +1,716 @@
+/****************************************************************************
+**
+** 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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.
+//
+
+#include <QtCore/qcoreapplication.h>
+#include "qaudioinput_alsa_p.h"
+#include "qaudiodeviceinfo_alsa_p.h"
+
+QT_BEGIN_NAMESPACE
+
+//#define DEBUG_AUDIO 1
+
+QAudioInputPrivate::QAudioInputPrivate(const QByteArray &device)
+{
+ 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::StoppedState;
+ audioSource = 0;
+ pullMode = true;
+ resuming = false;
+
+ m_device = device;
+
+ 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;
+}
+
+void QAudioInputPrivate::setFormat(const QAudioFormat& fmt)
+{
+ if (deviceState == QAudio::StoppedState)
+ settings = fmt;
+}
+
+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 {
+ bytesAvailable = bytesReady();
+ if (bytesAvailable <= 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);
+}
+
+void QAudioInputPrivate::start(QIODevice* device)
+{
+ if(deviceState != QAudio::StoppedState)
+ close();
+
+ if(!pullMode && audioSource)
+ delete audioSource;
+
+ pullMode = true;
+ audioSource = device;
+
+ deviceState = QAudio::ActiveState;
+
+ if( !open() )
+ return;
+
+ emit stateChanged(deviceState);
+}
+
+QIODevice* QAudioInputPrivate::start()
+{
+ if(deviceState != QAudio::StoppedState)
+ close();
+
+ if(!pullMode && audioSource)
+ delete audioSource;
+
+ pullMode = false;
+ audioSource = new InputPrivate(this);
+ audioSource->open(QIODevice::ReadOnly | QIODevice::Unbuffered);
+
+ deviceState = QAudio::IdleState;
+
+ if( !open() )
+ return 0;
+
+ emit stateChanged(deviceState);
+
+ return audioSource;
+}
+
+void QAudioInputPrivate::stop()
+{
+ if(deviceState == QAudio::StoppedState)
+ return;
+
+ deviceState = QAudio::StoppedState;
+
+ close();
+ emit stateChanged(deviceState);
+}
+
+bool QAudioInputPrivate::open()
+{
+#ifdef DEBUG_AUDIO
+ QTime now(QTime::currentTime());
+ qDebug()<<now.second()<<"s "<<now.msec()<<"ms :open()";
+#endif
+ clockStamp.restart();
+ timeStamp.restart();
+ elapsedTimeOffset = 0;
+
+ int dir;
+ int err=-1;
+ int count=0;
+ unsigned int freakuency=settings.frequency();
+
+ QString dev = QString(QLatin1String(m_device.constData()));
+ QList<QByteArray> devices = QAudioDeviceInfoInternal::availableDevices(QAudio::AudioInput);
+ if(dev.compare(QLatin1String("default")) == 0) {
+#if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
+ dev = QLatin1String(devices.first());
+#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_CAPTURE,0);
+ if(err < 0)
+ count++;
+ }
+ if (( err < 0)||(handle == 0)) {
+ errorState = QAudio::OpenError;
+ deviceState = QAudio::StoppedState;
+ 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::fromLatin1("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::fromLatin1("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::fromLatin1("QAudioInput: snd_pcm_hw_params_set_access: err = %1").arg(err);
+ }
+ }
+ if ( !fatal ) {
+ err = setFormat();
+ if ( err < 0 ) {
+ fatal = true;
+ errMessage = QString::fromLatin1("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::fromLatin1("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::fromLatin1("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::fromLatin1("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::fromLatin1("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::fromLatin1("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::fromLatin1("QAudioInput: snd_pcm_hw_params: err = %1").arg(err);
+ }
+ }
+ if( err < 0) {
+ qWarning()<<errMessage;
+ errorState = QAudio::OpenError;
+ deviceState = QAudio::StoppedState;
+ 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;
+
+ totalTimeValue = 0;
+
+ return true;
+}
+
+void QAudioInputPrivate::close()
+{
+ 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 && deviceState != QAudio::IdleState)
+ return 0;
+ int frames = snd_pcm_avail_update(handle);
+ if (frames < 0) return frames;
+ 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(len)
+
+ // Read in some audio data and write it to QIODevice, pull mode
+ if ( !handle )
+ return 0;
+
+ bytesAvailable = bytesReady();
+
+ if (bytesAvailable < 0) {
+ // bytesAvailable as negative is error code, try to recover from it.
+ xrun_recovery(bytesAvailable);
+ bytesAvailable = bytesReady();
+ if (bytesAvailable < 0) {
+ // recovery failed must stop and set error.
+ close();
+ errorState = QAudio::IOError;
+ deviceState = QAudio::StoppedState;
+ emit stateChanged(deviceState);
+ return 0;
+ }
+ }
+
+ 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::fromLatin1("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()<<"frames to write to QIODevice = "<<
+ snd_pcm_bytes_to_frames( handle, (int)err )<<" ("<<err<<") bytes";
+#endif
+ if(deviceState != QAudio::ActiveState && deviceState != QAudio::IdleState)
+ return 0;
+ if (pullMode) {
+ qint64 l = audioSource->write(audioBuffer,err);
+ if(l < 0) {
+ close();
+ errorState = QAudio::IOError;
+ deviceState = QAudio::StoppedState;
+ emit stateChanged(deviceState);
+ } else if(l == 0) {
+ if (deviceState != QAudio::IdleState) {
+ errorState = QAudio::NoError;
+ deviceState = QAudio::IdleState;
+ emit stateChanged(deviceState);
+ }
+ } else {
+ totalTimeValue += err;
+ resuming = false;
+ if (deviceState != QAudio::ActiveState) {
+ errorState = QAudio::NoError;
+ deviceState = QAudio::ActiveState;
+ emit stateChanged(deviceState);
+ }
+ }
+ return l;
+
+ } else {
+ memcpy(data,audioBuffer,err);
+ totalTimeValue += err;
+ resuming = false;
+ if (deviceState != QAudio::ActiveState) {
+ errorState = QAudio::NoError;
+ deviceState = QAudio::ActiveState;
+ emit stateChanged(deviceState);
+ }
+ return err;
+ }
+ }
+ return 0;
+}
+
+void QAudioInputPrivate::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 = buffer_size;
+ }
+ resuming = true;
+ deviceState = QAudio::ActiveState;
+ int chunks = buffer_size/period_size;
+ timer->start(period_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 = qMax(0, ms);
+}
+
+int QAudioInputPrivate::notifyInterval() const
+{
+ return intervalTime;
+}
+
+qint64 QAudioInputPrivate::processedUSecs() const
+{
+ qint64 result = qint64(1000000) * totalTimeValue /
+ (settings.channels()*(settings.sampleSize()/8)) /
+ settings.frequency();
+
+ return result;
+}
+
+void QAudioInputPrivate::suspend()
+{
+ if(deviceState == QAudio::ActiveState||resuming) {
+ timer->stop();
+ deviceState = QAudio::SuspendedState;
+ emit stateChanged(deviceState);
+ }
+}
+
+void QAudioInputPrivate::userFeed()
+{
+ if(deviceState == QAudio::StoppedState || deviceState == QAudio::SuspendedState)
+ 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(intervalTime && (timeStamp.elapsed() + elapsedTimeOffset) > intervalTime) {
+ emit notify();
+ elapsedTimeOffset = timeStamp.elapsed() + elapsedTimeOffset - intervalTime;
+ timeStamp.restart();
+ }
+ return true;
+}
+
+qint64 QAudioInputPrivate::elapsedUSecs() const
+{
+ if (deviceState == QAudio::StoppedState)
+ return 0;
+
+ return clockStamp.elapsed()*1000;
+}
+
+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)
+{
+ return audioDevice->read(data,len);
+}
+
+qint64 InputPrivate::writeData(const char* data, qint64 len)
+{
+ Q_UNUSED(data)
+ Q_UNUSED(len)
+ return 0;
+}
+
+void InputPrivate::trigger()
+{
+ emit readyRead();
+}
+
+QT_END_NAMESPACE