public interface SynthesisCallback
start(int, int, int), then audioAvailable(byte[], int, int) until all audio has been provided, then finally
done().
error() can be called at any stage in the synthesis process to
indicate that an error has occurred, but if the call is made after a call
to done(), it might be discarded.| Modifier and Type | Method and Description |
|---|---|
int |
audioAvailable(byte[] buffer,
int offset,
int length)
The service should call this method when synthesized audio is ready for consumption.
|
int |
done()
The service should call this method when all the synthesized audio for a request has
been passed to
audioAvailable(byte[], int, int). |
void |
error()
The service should call this method if the speech synthesis fails.
|
int |
getMaxBufferSize() |
int |
start(int sampleRateInHz,
int audioFormat,
int channelCount)
The service should call this when it starts to synthesize audio for this
request.
|
int getMaxBufferSize()
audioAvailable(byte[], int, int). Calls to audioAvailable(byte[], int, int) with data lengths
larger than this value will not succeed.int start(int sampleRateInHz,
int audioFormat,
int channelCount)
TextToSpeechService.onSynthesizeText(android.speech.tts.SynthesisRequest, android.speech.tts.SynthesisCallback).sampleRateInHz - Sample rate in HZ of the generated audio.audioFormat - Audio format of the generated audio. Must be one of
the ENCODING_ constants defined in AudioFormat.channelCount - The number of channels. Must be 1 or 2.TextToSpeech.SUCCESS or TextToSpeech.ERROR.int audioAvailable(byte[] buffer,
int offset,
int length)
TextToSpeechService.onSynthesizeText(android.speech.tts.SynthesisRequest, android.speech.tts.SynthesisCallback).buffer - The generated audio data. This method will not hold on to buffer,
so the caller is free to modify it after this method returns.offset - The offset into buffer where the audio data starts.length - The number of bytes of audio data in buffer. This must be
less than or equal to the return value of getMaxBufferSize().TextToSpeech.SUCCESS or TextToSpeech.ERROR.int done()
audioAvailable(byte[], int, int).
This method should only be called on the synthesis thread,
while in TextToSpeechService.onSynthesizeText(android.speech.tts.SynthesisRequest, android.speech.tts.SynthesisCallback).TextToSpeech.SUCCESS or TextToSpeech.ERROR.void error()
TextToSpeechService.onSynthesizeText(android.speech.tts.SynthesisRequest, android.speech.tts.SynthesisCallback).