Syntax
MMRESULT TextToSpeechStartup
(HWND hWnd,
LPTTS_HANDLE_T *phTTS,
UINT uiDeviceNumber,
DWORD dwDeviceOptions)
Parameters
HWND hWnd
This handle is used to send messages back to the window procedure. The window handle is used by DECtalk Software to inform the application when the buffer is full (if DECtalk Software in-memory calls are being used) or when the TextToSpeechSpeak() call encounters an index mark.
A value of NULL is passed in if no window handle is desired.
LPTTS_HANDLE_T *phTTS
Specifies a text-to-speech handle.
UINT uiDeviceNumber
Specifies a device number of the wave output device. A value of WAVE_MAPPER can be used to select the first available device.
DWORD dwDeviceOptions
Specifies how the wave output device is managed. It can be a combination of the following constants defined in include file ttsapi.h:
Constants
Description
The wave output device is opened. No other process can allocate the wave output device until TextToSpeechShutdown is called.
If OWN_AUDIO_DEVICE is NOT specified, the wave output device is opened after audio is queued by the TextToSpeechSpeak() call. The wave output device is released when the text-to-speech system has completed speaking.
If an attempt is made to open the wave output device while another process owns it, then an error message is sent to the calling application.
When this flag is set, speech samples are ignored until one of the text-to-speech special modes is set. The text-to-speech special modes can be used to write the speech samples to wave file, memory buffers, or log files. No error is returned if a wave output device is not present.
Return Value
This call returns a value of type MMRESULT. The return value is zero if the call is successful. The return value is one of the following constants:
Constant
Description
MMSYSERR_NOERROR
Normal successful completion (zero).
MMSYSERR_NODRIVER
No wave output device present.
MMSYSERR_NOMEM
Memory allocation error.
MMSYSERR_ERROR
DECtalk Software dictionary not found.
MMSYSERR_baddevice_id
Device ID out of range.
MMSYSERR_ALLOCATED
License exists but no more units available.
WAVERR_BADFORMAT
Wave output device does not support request format.
Comments
If the window procedure is defined, then a post message is sent to the calling application when a buffer is filled while in speech-to-memory mode, an error occurs, or an index mark is encountered.
The default parameters are:
? Language: American English.
? Speaking rate: 200 words per minute.
? Speaker: Paul
If you build an application for the static version of DECtalk Software, you must include the winmm.lib file in the list of input files for the linker.
See Also
Callback Routines and Window Procedures
Dictionary Functions (Windows only)