QAudioOutputPrivate::QAudioOutputPrivate(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_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; QStringList list1 = QString(QLatin1String(device)).split(QLatin1String(":")); m_device = QByteArray(list1.at(0).toLocal8Bit().constData()); timer = new QTimer(this); connect(timer,SIGNAL(timeout()),SLOT(userFeed())); }
QT_BEGIN_NAMESPACE //#define DEBUG_AUDIO 1 QAlsaAudioInput::QAlsaAudioInput(const QByteArray &device) { bytesAvailable = 0; handle = 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; errorState = QAudio::NoError; deviceState = QAudio::StoppedState; audioSource = 0; pullMode = true; resuming = false; m_volume = 1.0f; m_device = device; timer = new QTimer(this); connect(timer,SIGNAL(timeout()),SLOT(userFeed())); }
QT_BEGIN_NAMESPACE //#define DEBUG_AUDIO 1 QAudioOutputPrivate::QAudioOutputPrivate(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_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())); }
QPulseAudioInput::QPulseAudioInput(const QByteArray &device) : m_totalTimeValue(0) , m_audioSource(0) , m_errorState(QAudio::NoError) , m_deviceState(QAudio::StoppedState) , m_volume(qreal(1.0f)) , m_pullMode(true) , m_opened(false) , m_bytesAvailable(0) , m_bufferSize(0) , m_periodSize(0) , m_intervalTime(1000) , m_periodTime(PeriodTimeMs) , m_stream(0) , m_device(device) { m_timer = new QTimer(this); connect(m_timer, SIGNAL(timeout()), SLOT(userFeed())); }
bool QAlsaAudioInput::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 = 0; int count=0; unsigned int sampleRate=settings.sampleRate(); if (!settings.isValid()) { qWarning("QAudioInput: open error, invalid format."); } else if (settings.sampleRate() <= 0) { qWarning("QAudioInput: 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 = QAlsaAudioDeviceInfo::availableDevices(QAudio::AudioInput); 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_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.channelCount() ); 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, &sampleRate, 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 ringBuffer.resize(buffer_size); snd_pcm_prepare( handle ); snd_pcm_start(handle); // Step 5: Setup timer bytesAvailable = checkBytesReady(); 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; }