Craig Watson
9 years ago
parent
a2fb735bbc
commit
11c207d7ee
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#include "UBMicrophoneInput.h" |
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UBMicrophoneInput::UBMicrophoneInput() |
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: mAudioInput(NULL) |
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, mIODevice(NULL) |
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, mSeekPos(0) |
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{ |
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} |
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UBMicrophoneInput::~UBMicrophoneInput() |
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{ |
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if (mAudioInput) |
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delete mAudioInput; |
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} |
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int UBMicrophoneInput::channelCount() |
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{ |
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return mAudioFormat.channelCount(); |
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} |
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int UBMicrophoneInput::sampleRate() |
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{ |
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return mAudioFormat.sampleRate(); |
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} |
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/* Return the sample size in bits */ |
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int UBMicrophoneInput::sampleSize() |
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{ |
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return mAudioFormat.sampleSize(); |
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} |
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/** Return the sample format in FFMpeg style (AVSampleFormat enum) */ |
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int UBMicrophoneInput::sampleFormat() |
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{ |
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enum AVSampleFormat { |
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AV_SAMPLE_FMT_NONE = -1, |
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AV_SAMPLE_FMT_U8, |
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AV_SAMPLE_FMT_S16, |
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AV_SAMPLE_FMT_S32, |
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AV_SAMPLE_FMT_FLT, |
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AV_SAMPLE_FMT_DBL, |
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AV_SAMPLE_FMT_U8P, |
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AV_SAMPLE_FMT_S16P, |
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AV_SAMPLE_FMT_S32P, |
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AV_SAMPLE_FMT_FLTP, |
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AV_SAMPLE_FMT_DBLP, |
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AV_SAMPLE_FMT_NB |
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}; |
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int sampleSize = mAudioFormat.sampleSize(); |
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QAudioFormat::SampleType sampleType = mAudioFormat.sampleType(); |
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// qDebug() << "Input sample format: " << sampleSize << "bits " << sampleType;
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switch (sampleType) { |
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case QAudioFormat::Unknown: |
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return AV_SAMPLE_FMT_NONE; |
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case QAudioFormat::SignedInt: |
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if (sampleSize == 16) |
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return AV_SAMPLE_FMT_S16; |
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if (sampleSize == 32) |
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return AV_SAMPLE_FMT_S32; |
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case QAudioFormat::UnSignedInt: |
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if (sampleSize == 8) |
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return AV_SAMPLE_FMT_U8; |
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case QAudioFormat::Float: |
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return AV_SAMPLE_FMT_FLT; |
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default: |
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return AV_SAMPLE_FMT_NONE; |
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} |
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} |
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QString UBMicrophoneInput::codec() |
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{ |
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return mAudioFormat.codec(); |
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} |
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qint64 UBMicrophoneInput::processUSecs() const |
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{ |
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return mAudioInput->processedUSecs(); |
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} |
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bool UBMicrophoneInput::init() |
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{ |
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if (mAudioDeviceInfo.isNull()) { |
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qWarning("No audio input device selected; using default"); |
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mAudioDeviceInfo = QAudioDeviceInfo::defaultInputDevice(); |
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} |
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qDebug() << "Input device name: " << mAudioDeviceInfo.deviceName(); |
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mAudioFormat = mAudioDeviceInfo.preferredFormat(); |
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mAudioInput = new QAudioInput(mAudioDeviceInfo, mAudioFormat, NULL); |
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//mAudioInput->setNotifyInterval(100);
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connect(mAudioInput, SIGNAL(stateChanged(QAudio::State)), |
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this, SLOT(onAudioInputStateChanged(QAudio::State))); |
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return true; |
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} |
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void UBMicrophoneInput::start() |
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{ |
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qDebug() << "starting audio input"; |
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mIODevice = mAudioInput->start(); |
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connect(mIODevice, SIGNAL(readyRead()), |
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this, SLOT(onDataReady())); |
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if (mAudioInput->error() == QAudio::OpenError) |
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qWarning() << "Error opening audio input"; |
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} |
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void UBMicrophoneInput::stop() |
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{ |
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mAudioInput->stop(); |
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} |
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QStringList UBMicrophoneInput::availableDevicesNames() |
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{ |
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QStringList names; |
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QList<QAudioDeviceInfo> devices = QAudioDeviceInfo::availableDevices(QAudio::AudioInput); |
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foreach (QAudioDeviceInfo device, devices) { |
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names.push_back(device.deviceName()); |
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} |
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return names; |
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} |
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void UBMicrophoneInput::setInputDevice(QString name) |
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{ |
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if (name.isEmpty()) { |
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mAudioDeviceInfo = QAudioDeviceInfo::defaultInputDevice(); |
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return; |
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} |
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QList<QAudioDeviceInfo> devices = QAudioDeviceInfo::availableDevices(QAudio::AudioInput); |
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bool found = false; |
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foreach (QAudioDeviceInfo device, devices) { |
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if (device.deviceName() == name) { |
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mAudioDeviceInfo = device; |
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found = true; |
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break; |
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} |
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} |
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if (!found) { |
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qWarning() << "Audio input device not found; using default instead"; |
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mAudioDeviceInfo = QAudioDeviceInfo::defaultInputDevice(); |
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} |
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} |
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void UBMicrophoneInput::onDataReady() |
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{ |
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int numBytes = mAudioInput->bytesReady(); |
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if (numBytes > 0) |
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emit dataAvailable(mIODevice->read(numBytes)); |
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} |
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void UBMicrophoneInput::onAudioInputStateChanged(QAudio::State state) |
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{ |
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qDebug() << "Audio input state changed to " << state; |
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switch (state) { |
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case QAudio::StoppedState: |
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if (mAudioInput->error() != QAudio::NoError) { |
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emit error(getErrorString(mAudioInput->error())); |
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} |
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break; |
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// handle other states?
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default: |
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break; |
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} |
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} |
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/**
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* @brief Return a meaningful error string based on QAudio error codes |
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*/ |
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QString UBMicrophoneInput::getErrorString(QAudio::Error errorCode) |
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{ |
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switch (errorCode) { |
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case QAudio::NoError : |
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return ""; |
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case QAudio::OpenError : |
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return "Couldn't open the audio device"; |
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case QAudio::IOError : |
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return "Error reading from audio device"; |
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case QAudio::UnderrunError : |
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return "Underrun error"; |
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case QAudio::FatalError : |
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return "Fatal error; audio device unusable"; |
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} |
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return ""; |
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} |
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@ -0,0 +1,57 @@ |
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#ifndef UBMICROPHONEINPUT_H |
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#define UBMICROPHONEINPUT_H |
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#include <QtCore> |
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#include <QAudioInput> |
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/**
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* @brief The UBMicrophoneInput class captures uncompressed sound from a microphone |
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*/ |
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class UBMicrophoneInput : public QObject |
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{ |
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Q_OBJECT |
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public: |
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UBMicrophoneInput(); |
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virtual ~UBMicrophoneInput(); |
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bool init(); |
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void start(); |
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void stop(); |
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static QStringList availableDevicesNames(); |
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void setInputDevice(QString name = ""); |
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int channelCount(); |
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int sampleRate(); |
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int sampleSize(); |
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int sampleFormat(); |
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QString codec(); |
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qint64 processUSecs() const; |
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signals: |
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/// Send the new volume, between 0 and 255
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void audioLevelChanged(quint8 level); |
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/// Emitted when new audio data is available
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void dataAvailable(QByteArray data); |
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void error(QString message); |
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private slots: |
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void onAudioInputStateChanged(QAudio::State state); |
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void onDataReady(); |
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private: |
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QString getErrorString(QAudio::Error errorCode); |
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QAudioInput* mAudioInput; |
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QIODevice * mIODevice; |
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QAudioDeviceInfo mAudioDeviceInfo; |
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QAudioFormat mAudioFormat; |
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qint64 mSeekPos; |
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}; |
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#endif // UBMICROPHONEINPUT_H
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