Re: [Espeak-general] Working example using speak_lib.h

[Jonathan D. <jo...@js...>]

On 25 Dec, Soumen banerjee <sou...@gm...> wrote:

> Im trying to make a C++ Program using Qt to read text files etc Ive
> tried searching extensively, id be delighted if you could furnish me a
> basic example on how to use speak_lib.h.

espeak.cpp  is an example of a small program which uses speak_lib.h to
call the libespeak shared library.

Do you have a specific question? 

> In order, i think we should be calling

> espeak_Initialize()
> espeak_SetSynthCallback()
> espeak_Synth()

> with the relevant parameters.

Yes, that is correct.
The probably also want to call:
  espeak_SetVoiceByName()

and perhaps:
  espeak_SetParameter()

Which output mode do you use?  If you use AUDIO_OUTPUT_RETRIEVAL or
AUDIO_OUTPUT_SYNCHRONOUS then you must call espeak_SetSynthCallback(). 
This specifies a function in your program which is called with buffers
of sound data.  Your program is responsible for playing the sound data.

If you use AUDIO_OUTPUT_PLAYBACK or AUDIO_OUTPUT_SYNCH_PLAYBACK then
libespeak plays the sound data, and you don't need to call
espeak_SetSynthCallback(), unless you want to receive word and sentence
events.