diff options
Diffstat (limited to 'demos/spectrum/app/engine.h')
-rw-r--r-- | demos/spectrum/app/engine.h | 57 |
1 files changed, 29 insertions, 28 deletions
diff --git a/demos/spectrum/app/engine.h b/demos/spectrum/app/engine.h index e14ac83..c97083e 100644 --- a/demos/spectrum/app/engine.h +++ b/demos/spectrum/app/engine.h @@ -91,12 +91,6 @@ public: QAudio::State state() const { return m_state; } /** - * \return Reference to internal audio buffer - * \note This reference is valid for the lifetime of the Engine - */ - const QByteArray& buffer() const { return m_buffer; } - - /** * \return Current audio format * \note May be QAudioFormat() if engine is not initialized */ @@ -129,7 +123,7 @@ public: /** * Position of the audio input device. - * \return Position in microseconds. + * \return Position in bytes. */ qint64 recordPosition() const { return m_recordPosition; } @@ -147,27 +141,21 @@ public: /** * Position of the audio output device. - * \return Position in microseconds. + * \return Position in bytes. */ qint64 playPosition() const { return m_playPosition; } /** * Length of the internal engine buffer. - * \return Buffer length in microseconds. + * \return Buffer length in bytes. */ - qint64 bufferDuration() const; + qint64 bufferLength() const; /** * Amount of data held in the buffer. - * \return Data duration in microseconds. + * \return Data length in bytes. */ - qint64 dataDuration() const; - - /** - * Returns the size of the underlying audio buffer in bytes. - * This should be an approximation of the capture latency. - */ - qint64 audioBufferLength() const; + qint64 dataLength() const { return m_dataLength; } /** * Set window function applied to audio data before spectral analysis. @@ -203,23 +191,23 @@ signals: * Length of buffer has changed. * \param duration Duration in microseconds */ - void bufferDurationChanged(qint64 duration); + void bufferLengthChanged(qint64 duration); /** * Amount of data in buffer has changed. - * \param duration Duration of data in microseconds + * \param Length of data in bytes */ - void dataDurationChanged(qint64 duration); + void dataLengthChanged(qint64 duration); /** * Position of the audio input device has changed. - * \param position Position in microseconds + * \param position Position in bytes */ void recordPositionChanged(qint64 position); /** * Position of the audio output device has changed. - * \param position Position in microseconds + * \param position Position in bytes */ void playPositionChanged(qint64 position); @@ -233,12 +221,19 @@ signals: /** * Spectrum has changed. - * \param position Position of start of window in microseconds - * \param length Length of window in microseconds + * \param position Position of start of window in bytes + * \param length Length of window in bytes * \param spectrum Resulting frequency spectrum */ void spectrumChanged(qint64 position, qint64 length, const FrequencySpectrum &spectrum); + /** + * Buffer containing audio data has changed. + * \param position Position of start of buffer in bytes + * \param buffer Buffer + */ + void bufferChanged(qint64 position, qint64 length, const QByteArray &buffer); + private slots: void audioNotify(); void audioStateChanged(QAudio::State state); @@ -246,6 +241,7 @@ private slots: void spectrumChanged(const FrequencySpectrum &spectrum); private: + void resetAudioDevices(); bool initialize(); bool selectFormat(); void stopRecording(); @@ -275,8 +271,10 @@ private: bool m_generateTone; SweptTone m_tone; - QFile* m_file; - WavFile m_wavFile; + WavFile* m_file; + // We need a second file handle via which to read data into m_buffer + // for analysis + WavFile* m_analysisFile; QAudioFormat m_format; @@ -293,12 +291,15 @@ private: QBuffer m_audioOutputIODevice; QByteArray m_buffer; + qint64 m_bufferPosition; + qint64 m_bufferLength; qint64 m_dataLength; + int m_levelBufferLength; qreal m_rmsLevel; qreal m_peakLevel; - int m_spectrumLengthBytes; + int m_spectrumBufferLength; QByteArray m_spectrumBuffer; SpectrumAnalyser m_spectrumAnalyser; qint64 m_spectrumPosition; |