コード例 #1
0
bool QPulseAudioInput::deviceReady()
{
   if (m_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
        if (m_audioSource != 0) {
            PulseInputPrivate *a = qobject_cast<PulseInputPrivate*>(m_audioSource);
            a->trigger();
        }
    }
    m_bytesAvailable = checkBytesReady();

    if (m_deviceState != QAudio::ActiveState)
        return true;

    if (m_intervalTime && (m_timeStamp.elapsed() + m_elapsedTimeOffset) > m_intervalTime) {
        emit notify();
        m_elapsedTimeOffset = m_timeStamp.elapsed() + m_elapsedTimeOffset - m_intervalTime;
        m_timeStamp.restart();
    }

    return true;
}
コード例 #2
0
bool QAlsaAudioInput::deviceReady()
{
    if(pullMode) {
        // reads some audio data and writes it to QIODevice
        read(0, buffer_size);
    } else {
        // emits readyRead() so user will call read() on QIODevice to get some audio data
        AlsaInputPrivate* a = qobject_cast<AlsaInputPrivate*>(audioSource);
        a->trigger();
    }
    bytesAvailable = checkBytesReady();

    if(deviceState != QAudio::ActiveState)
        return true;

    if (bytesAvailable < 0) {
        // bytesAvailable as negative is error code, try to recover from it.
        xrun_recovery(bytesAvailable);
        bytesAvailable = checkBytesReady();
        if (bytesAvailable < 0) {
            // recovery failed must stop and set error.
            close();
            errorState = QAudio::IOError;
            deviceState = QAudio::StoppedState;
            emit stateChanged(deviceState);
            return 0;
        }
    }

    if(intervalTime && (timeStamp.elapsed() + elapsedTimeOffset) > intervalTime) {
        emit notify();
        elapsedTimeOffset = timeStamp.elapsed() + elapsedTimeOffset - intervalTime;
        timeStamp.restart();
    }
    return true;
}
コード例 #3
0
int QAlsaAudioInput::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 = checkBytesReady();
            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;
}
コード例 #4
0
qint64 QAlsaAudioInput::read(char* data, qint64 len)
{
    // Read in some audio data and write it to QIODevice, pull mode
    if ( !handle )
        return 0;

    int bytesRead = 0;
    int bytesInRingbufferBeforeRead = ringBuffer.bytesOfDataInBuffer();

    if (ringBuffer.bytesOfDataInBuffer() < len) {

        // bytesAvaiable is saved as a side effect of checkBytesReady().
        int bytesToRead = checkBytesReady();

        if (bytesToRead < 0) {
            // bytesAvailable as negative is error code, try to recover from it.
            xrun_recovery(bytesToRead);
            bytesToRead = checkBytesReady();
            if (bytesToRead < 0) {
                // recovery failed must stop and set error.
                close();
                errorState = QAudio::IOError;
                deviceState = QAudio::StoppedState;
                emit stateChanged(deviceState);
                return 0;
            }
        }

        bytesToRead = qMin<qint64>(len, bytesToRead);
        bytesToRead = qMin<qint64>(ringBuffer.freeBytes(), bytesToRead);
        bytesToRead -= bytesToRead % period_size;

        int count=0;
        int err = 0;
        while(count < 5 && bytesToRead > 0) {
            char buffer[bytesToRead];
            int chunks = bytesToRead / period_size;
            int frames = chunks * period_frames;
            if (frames > (int)buffer_frames)
                frames = buffer_frames;

            int readFrames = snd_pcm_readi(handle, buffer, frames);
            bytesRead = snd_pcm_frames_to_bytes(handle, readFrames);
            if (m_volume < 1.0f)
                QAudioHelperInternal::qMultiplySamples(m_volume, settings, buffer, buffer, bytesRead);

            if (readFrames >= 0) {
                ringBuffer.write(buffer, bytesRead);
#ifdef DEBUG_AUDIO
                qDebug() << QString::fromLatin1("read in bytes = %1 (frames=%2)").arg(bytesRead).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++;
        }

    }

    bytesRead += bytesInRingbufferBeforeRead;

    if (bytesRead > 0) {
        // got some send it onward
#ifdef DEBUG_AUDIO
        qDebug() << "frames to write to QIODevice = " <<
            snd_pcm_bytes_to_frames( handle, (int)bytesRead ) << " (" << bytesRead << ") bytes";
#endif
        if (deviceState != QAudio::ActiveState && deviceState != QAudio::IdleState)
            return 0;

        if (pullMode) {
            qint64 l = 0;
            qint64 bytesWritten = 0;
            while (ringBuffer.bytesOfDataInBuffer() > 0) {
                l = audioSource->write(ringBuffer.availableData(), ringBuffer.availableDataBlockSize());
                if (l > 0) {
                    ringBuffer.readBytes(l);
                    bytesWritten += l;
                } else {
                    break;
                }
            }

            if (l < 0) {
                close();
                errorState = QAudio::IOError;
                deviceState = QAudio::StoppedState;
                emit stateChanged(deviceState);
            } else if (l == 0 && bytesWritten == 0) {
                if (deviceState != QAudio::IdleState) {
                    errorState = QAudio::NoError;
                    deviceState = QAudio::IdleState;
                    emit stateChanged(deviceState);
                }
            } else {
                bytesAvailable -= bytesWritten;
                totalTimeValue += bytesWritten;
                resuming = false;
                if (deviceState != QAudio::ActiveState) {
                    errorState = QAudio::NoError;
                    deviceState = QAudio::ActiveState;
                    emit stateChanged(deviceState);
                }
            }

            return bytesWritten;
        } else {
            while (ringBuffer.bytesOfDataInBuffer() > 0) {
                int size = ringBuffer.availableDataBlockSize();
                memcpy(data, ringBuffer.availableData(), size);
                data += size;
                ringBuffer.readBytes(size);
            }

            bytesAvailable -= bytesRead;
            totalTimeValue += bytesRead;
            resuming = false;
            if (deviceState != QAudio::ActiveState) {
                errorState = QAudio::NoError;
                deviceState = QAudio::ActiveState;
                emit stateChanged(deviceState);
            }

            return bytesRead;
        }
    }

    return 0;
}
コード例 #5
0
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;
}
コード例 #6
0
qint64 QAudioInputPrivate::read(char* data, qint64 len)
{
    // Read in some audio data and write it to QIODevice, pull mode
    if ( !handle )
        return 0;

    // bytesAvaiable is saved as a side effect of checkBytesReady().
    int bytesToRead = checkBytesReady();

    if (bytesToRead < 0) {
        // bytesAvailable as negative is error code, try to recover from it.
        xrun_recovery(bytesToRead);
        bytesToRead = checkBytesReady();
        if (bytesToRead < 0) {
            // recovery failed must stop and set error.
            close();
            errorState = QAudio::IOError;
            deviceState = QAudio::StoppedState;
            emit stateChanged(deviceState);
            return 0;
        }
    }

    bytesToRead = qMin<qint64>(len, bytesToRead);
    bytesToRead -= bytesToRead % period_size;
    int count=0, err = 0;
    while(count < 5) {
        int chunks = bytesToRead/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 {
                bytesAvailable -= err;
                totalTimeValue += err;
                resuming = false;
                if (deviceState != QAudio::ActiveState) {
                    errorState = QAudio::NoError;
                    deviceState = QAudio::ActiveState;
                    emit stateChanged(deviceState);
                }
            }
            return l;

        } else {
            memcpy(data,audioBuffer,err);
            bytesAvailable -= err;
            totalTimeValue += err;
            resuming = false;
            if (deviceState != QAudio::ActiveState) {
                errorState = QAudio::NoError;
                deviceState = QAudio::ActiveState;
                emit stateChanged(deviceState);
            }
            return err;
        }
    }
    return 0;
}
コード例 #7
0
}

int QAudioInputPrivate::bytesReady() const
{
    return qMax(bytesAvailable, 0);
}

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 = checkBytesReady();

    if (bytesAvailable < 0) {
        // bytesAvailable as negative is error code, try to recover from it.
        xrun_recovery(bytesAvailable);
        bytesAvailable = checkBytesReady();
        if (bytesAvailable < 0) {
            // recovery failed must stop and set error.
            close();
            errorState = QAudio::IOError;
            deviceState = QAudio::StoppedState;
            emit stateChanged(deviceState);
            return 0;
        }
    }
コード例 #8
0
qint64 QPulseAudioInput::read(char *data, qint64 len)
{
    m_bytesAvailable = checkBytesReady();

    setError(QAudio::NoError);
    setState(QAudio::ActiveState);

    int readBytes = 0;

    if (!m_pullMode && !m_tempBuffer.isEmpty()) {
        readBytes = qMin(static_cast<int>(len), m_tempBuffer.size());
        memcpy(data, m_tempBuffer.constData(), readBytes);
        m_totalTimeValue += readBytes;

        if (readBytes < m_tempBuffer.size()) {
            m_tempBuffer.remove(0, readBytes);
            return readBytes;
        }

        m_tempBuffer.clear();
    }

    while (pa_stream_readable_size(m_stream) > 0) {
        size_t readLength = 0;

#ifdef DEBUG_PULSE
        qDebug() << "QPulseAudioInput::read -- " << pa_stream_readable_size(m_stream) << " bytes available from pulse audio";
#endif

        QPulseAudioEngine *pulseEngine = QPulseAudioEngine::instance();
        pulseEngine->lock();

        const void *audioBuffer;

        // Second and third parameters (audioBuffer and length) to pa_stream_peek are output parameters,
        // the audioBuffer pointer is set to point to the actual pulse audio data,
        // and the length is set to the length of this data.
        if (pa_stream_peek(m_stream, &audioBuffer, &readLength) < 0) {
            qWarning() << QString("pa_stream_peek() failed: %1").arg(pa_strerror(pa_context_errno(pa_stream_get_context(m_stream))));
            pulseEngine->unlock();
            return 0;
        }

        qint64 actualLength = 0;
        if (m_pullMode) {
            QByteArray adjusted(readLength, Qt::Uninitialized);
            applyVolume(audioBuffer, adjusted.data(), readLength);
            actualLength = m_audioSource->write(adjusted);

            if (actualLength < qint64(readLength)) {
                pulseEngine->unlock();

                setError(QAudio::UnderrunError);
                setState(QAudio::IdleState);

                return actualLength;
            }
        } else {
            actualLength = qMin(static_cast<int>(len - readBytes), static_cast<int>(readLength));
            applyVolume(audioBuffer, data + readBytes, actualLength);
        }

#ifdef DEBUG_PULSE
        qDebug() << "QPulseAudioInput::read -- wrote " << actualLength << " to client";
#endif

        if (actualLength < qint64(readLength)) {
#ifdef DEBUG_PULSE
            qDebug() << "QPulseAudioInput::read -- appending " << readLength - actualLength << " bytes of data to temp buffer";
#endif
            int diff = readLength - actualLength;
            int oldSize = m_tempBuffer.size();
            m_tempBuffer.resize(m_tempBuffer.size() + diff);
            applyVolume(static_cast<const char *>(audioBuffer) + actualLength, m_tempBuffer.data() + oldSize, diff);
            QMetaObject::invokeMethod(this, "userFeed", Qt::QueuedConnection);
        }

        m_totalTimeValue += actualLength;
        readBytes += actualLength;

        pa_stream_drop(m_stream);
        pulseEngine->unlock();

        if (!m_pullMode && readBytes >= len)
            break;

        if (m_intervalTime && (m_timeStamp.elapsed() + m_elapsedTimeOffset) > m_intervalTime) {
            emit notify();
            m_elapsedTimeOffset = m_timeStamp.elapsed() + m_elapsedTimeOffset - m_intervalTime;
            m_timeStamp.restart();
        }
    }

#ifdef DEBUG_PULSE
    qDebug() << "QPulseAudioInput::read -- returning after reading " << readBytes << " bytes";
#endif

    return readBytes;
}