// SetExtAudioFile sets the channel's output destination to an extended audio file, or back to the speakers, if eaf is nil.
func (c *Channel) SetExtAudioFile(eaf *ExtAudioFile) error {
var cref unsafe.Pointer
if eaf != nil {
cref = unsafe.Pointer(eaf.ceaf)
}
return osError(C.mactts_set_property_ptr(c.csc, C.kSpeechOutputToExtAudioFileProperty, cref))
}
// SetDone sets a synthesis completion callback function for the speech channel.
func (c *Channel) SetDone(done func()) error {
cbp := C.go_speechdone_cb
oserr := C.mactts_set_property_ptr(c.csc, C.kSpeechSpeechDoneCallBack, cbp)
if oserr != 0 {
return osError(oserr)
}
c.done = done
return nil
}
// SetPhonemeCb sets a callback function invoked before each phoneme is synthesized.
func (c *Channel) SetPhonemeCb(phonemeCb func(PhonemeCode)) error {
cbp := C.go_speechphoneme_cb
oserr := C.mactts_set_property_ptr(c.csc, C.kSpeechPhonemeCallBack, cbp)
if oserr != 0 {
return osError(oserr)
}
c.phonemeCb = phonemeCb
return nil
}
// NewChannel creates a speech synthesizer speech channel with option voice specification. If no voice is provided, the system voice is used.
func NewChannel(voice *VoiceSpec) (*Channel, error) {
var c Channel
oserr := C.NewSpeechChannel((*C.VoiceSpec)(voice), &c.csc)
if oserr != 0 {
return nil, osError(oserr)
}
refCon := unsafe.Pointer(&c)
oserr = C.mactts_set_property_ptr(c.csc, C.kSpeechRefConProperty, refCon)
if oserr != 0 {
disposeSpeechChannel(&c)
return nil, osError(oserr)
}
runtime.SetFinalizer(&c, disposeSpeechChannel)
return &c, nil
}