Examples of com.sun.speech.freetts.audio.AudioPlayer

com.sun.speech.freetts.audio.AudioPlayer

Provides an interface to the audio system for use by freetts. Audio is presented to the AudioPlayer as byte arrays. Implementations of this AudioPlayer interface will format the data based upon the current audio format (as set by setAudioFormat) and output the data.

The AudioPlayer interface provides a set of potential synchronization points to allow a specific AudioPlayer to batch output in various ways.

These synchronization points are in pairs: reset, drain are used to bracket output of large amounts of audio data. Typically, an implementation will not return from drain until all queued audio has been played (or cancelled).

The methods: begin, end are used to bracket smaller amounts of audio data (typically associated with a single utterance).

Threading Issues

Most of the methods in an AudioPlayer must be called from a single thread. The only exceptions to this rule are pause, resume, cancel, showMetrics, close, getTime, resetTime which can be called from other threads.

        if (LOGGER.isLoggable(Level.FINE)) {
            LOGGER.fine("=== " +
                                 utterance.getString("input_text"));
        }


        AudioPlayer audioPlayer = utterance.getVoice().getAudioPlayer();


  audioPlayer.setAudioFormat(MBROLA_AUDIO);
  audioPlayer.setVolume(utterance.getVoice().getVolume());


        // The AudioPlayer interface currently does not allow streaming audio.
        // We need to know the total number of samples that will be written
        // before we can start writing them. Therefore, we need to load all
        // audio data for this utterance into RAM.
        
        List audioData = (List) utterance.getObject("mbrolaAudio");
        if (audioData == null) {
            throw new ProcessException
                ("No \"mbrolaAudio\" object is associated with utterance");
        }


        // total number of audio bytes


        int totalSize;
        try {
            totalSize = utterance.getInt("mbrolaAudioLength");
        } catch (NullPointerException npe) {
            totalSize = 0;
        }


        audioPlayer.begin(totalSize);


        for (Iterator it = audioData.iterator(); it.hasNext();) {
            byte[] bytes = (byte[]) it.next();
            if (!audioPlayer.write(bytes)) {
                throw new ProcessException
                    ("Cannot write audio data to audio player");
            }
        }


        if (!audioPlayer.end()) {
            throw new ProcessException("audio player reports problem");
        }
    }

     */
    public void processUtterance(Utterance utterance) throws ProcessException {
  LPCResult lpcResult = (LPCResult) utterance.getObject("target_lpcres");
  SampleInfo sampleInfo = 
      (SampleInfo) utterance.getObject(SampleInfo.UTT_NAME);
  AudioPlayer audioPlayer = utterance.getVoice().getAudioPlayer();


  audioPlayer.setAudioFormat(getAudioFormat(sampleInfo));
  audioPlayer.setVolume(utterance.getVoice().getVolume());


  if (LOGGER.isLoggable(Level.FINE)) {
      LOGGER.fine("=== " +
    utterance.getString("input_text"));
  }

Examples of com.sun.speech.freetts.audio.AudioPlayer

Threading Issues

Related Classes of com.sun.speech.freetts.audio.AudioPlayer