Example usage for android.speech.tts SynthesisCallback start

Introduction

In this page you can find the example usage for android.speech.tts SynthesisCallback start.

Prototype

int start(int sampleRateInHz, @SupportedAudioFormat int audioFormat,
        @IntRange(from = 1, to = 2) int channelCount);

Source Link

Document

The service should call this when it starts to synthesize audio for this request.

Usage

From source file:com.github.olga_yakovleva.rhvoice.android.RHVoiceService.java

@Override
protected void onSynthesizeText(SynthesisRequest request, SynthesisCallback callback) {
    if (BuildConfig.DEBUG) {
        Log.v(TAG, "onSynthesize called");
        logLanguage(request.getLanguage(), request.getCountry(), request.getVariant());
    }//from   w  w  w .  j a  v  a 2 s. c om
    Tts tts = ttsManager.acquireForSynthesis();
    if (tts == null) {
        if (BuildConfig.DEBUG)
            Log.w(TAG, "Not initialized yet");
        callback.error();
        return;
    }
    try {
        speaking = true;
        Map<String, LanguageSettings> languageSettings = getLanguageSettings(tts);
        String voiceName = "";
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP)
            voiceName = request.getVoiceName();
        final Candidate bestMatch = findBestVoice(tts, request.getLanguage(), request.getCountry(),
                request.getVariant(), voiceName, languageSettings);
        if (bestMatch.voice == null) {
            if (BuildConfig.DEBUG)
                Log.e(TAG, "Unsupported language");
            callback.error();
            return;
        }
        if (BuildConfig.DEBUG)
            Log.v(TAG, "Selected voice: " + bestMatch.voice.getSource().getName());
        currentVoice = bestMatch.voice;
        StringBuilder voiceProfileSpecBuilder = new StringBuilder();
        voiceProfileSpecBuilder.append(bestMatch.voice.getSource().getName());
        for (Map.Entry<String, LanguageSettings> entry : languageSettings.entrySet()) {
            if (entry.getKey().equals(bestMatch.voice.getLanguage()))
                continue;
            if (entry.getValue().detect) {
                String name = entry.getValue().voice.getSource().getName();
                voiceProfileSpecBuilder.append("+").append(name);
            }
        }
        String profileSpec = voiceProfileSpecBuilder.toString();
        if (BuildConfig.DEBUG)
            Log.v(TAG, "Synthesizing the following text: " + request.getText());
        int rate = request.getSpeechRate();
        if (BuildConfig.DEBUG)
            Log.v(TAG, "rate=" + rate);
        int pitch = request.getPitch();
        if (BuildConfig.DEBUG)
            Log.v(TAG, "pitch=" + pitch);
        if (BuildConfig.DEBUG)
            Log.v(TAG, "Profile: " + profileSpec);
        final SynthesisParameters params = new SynthesisParameters();
        params.setVoiceProfile(profileSpec);
        params.setRate(((double) rate) / 100.0);
        params.setPitch(((double) pitch) / 100.0);
        final Player player = new Player(callback);
        callback.start(24000, AudioFormat.ENCODING_PCM_16BIT, 1);
        tts.engine.speak(request.getText(), params, player);
        callback.done();
    } catch (RHVoiceException e) {
        if (BuildConfig.DEBUG)
            Log.e(TAG, "Synthesis error", e);
        callback.error();
    } finally {
        speaking = false;
        ttsManager.release(tts);
    }
}

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