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- ------------------------------------------------------------------------------
-
- Initialization routine
- ----------------------
-
- Declaration:
-
- short pascal far RVOICE_INIT(void)
-
-
- This must be called once before any of the other routines are called. It hooks
- the interrupt service routine into the timer tick interrupt vector.
-
-
- Return value Meaning
- ------------ -------
- 0 success
- 1 voice package already initialized
- 2 wrong CPU, won't run on 8088 or 8086
-
- NOTE: RVOICE_INIT installs a Control-Break (Int 23h) handler which makes sure
- that the 8253 timer chip and the timer tick vector are restored to
- their original state before program termination. If your program
- installs its own Int 23h handler, then (a) It should be done after
- the call to RVOICE_INIT, and (b) It must call RVOICE_CBREAK before it
- allows the program to terminate. Failure to do this will result in
- a system crash.
-
-
- ------------------------------------------------------------------------------
-
- Cleanup routine
- ---------------
-
- Declaration:
-
- short pascal far RVOICE_CLEANUP(void)
-
-
- This restores the timer tick interrupt vector to its previous state. This
- routine must be called before the main program exits to DOS, unless the main
- program is memory-resident.
-
-
- Return value Meaning
- ------------ -------
- 0 success
- 1 voice package was not in the initialized state
-
-
- ------------------------------------------------------------------------------
-
- Start routine
- -------------
-
- Declaration:
-
- short pascal far RVOICE_START(blockaddr,blocklen,
- filewrite,handle,port,startpos)
- unsigned char far *blockaddr;
- long blocklen;
- unsigned short filewrite;
- unsigned short handle;
- short port;
- long startpos;
-
- This call initiates a voice input operation. It returns to the caller
- immediately. Voice input will continue asynchronously (background).
-
-
- Parameter Size Description
- --------- ---- -----------
- blockaddr 4 A far pointer to the memory block used for voice data.
- blocklen 4 A dword indicating the length of the memory block.
- filewrite 2 A flag word. If this is 1, then data will be written to
- a file. If it is 0, then no file operations will be
- performed.
- handle 2 An open file handle. This is ignored if the flag word
- is 0.
- port 2 The number (1 thru 4) of the COM port to be used for input.
- startpos 4 The byte offset within the memory block where recording
- will begin.
-
- Return value Meaning
- ------------ -------
- 0 success
- 1 block size is too small (blocklen < 8192 and
- file write = yes)
- 2 voice recording is already in progress
- 3 a COM port number not within the range of 1 thru 4
- was specified
- 4 starting position is greater than block length
-
-
- ------------------------------------------------------------------------------
-
- Catch-up routine
- ----------------
-
- Declaration:
-
- short pascal far RVOICE_CATCHUP(void)
-
-
- This must be called frequently from the main program if file writing is being
- used and the length of the data to be recorded is longer than the length of
- the memory block. The routine checks the progress of the address pointer in
- use by the interrupt service routine and writes new available data to the
- file.
-
-
- Return value Meaning
- ------------ -------
- 0 success
- 1 no new data to write -- this is not an error; it just
- means that the file was already "up-to-date"
- 2 error while writing file
-
-
- ------------------------------------------------------------------------------
-
- Stop routine
- ------------
-
- Declaration:
-
- void pascal far RVOICE_STOP(void)
-
-
- This must be called to terminate the voice input operations.
-
-
- ------------------------------------------------------------------------------
-
- Status routine
- --------------
-
- Declaration:
-
- void pascal far RVOICE_STATUS(pcount,pindex)
- long far *pcount;
- long far *pindex;
-
- This will report the status of voice operations.
-
-
- The first parameter is a far pointer to a dword which will receive the number
- of bytes which have been input.
-
- The second parameter is a far pointer to a dword which will receive the
- offset within the block of the next byte to be filled by voice data input.
-
-
-