MusicKit: _DSPMessage.h Source File

00001 #ifndef __MK__DSPMessage_H___
00002 #define __MK__DSPMessage_H___
00003 /* $Id: _DSPMessage.h 218 2000-01-31 20:23:53Z leigh $
00004  * Copyright 1988-1992, NeXT Inc.  All rights reserved. 
00005  */
00006 
00007 int _DSPHostMessageTimed(DSPFix48 *aTimeStampP, int msg);
00008 /* 
00009  * Issue timed or untimed DSP "host message" (0 args) by issuing "xhm" 
00010  * host command.
00011  * 
00012  * This is private because it is assumed that there is enough room in the TMQ.
00013  * It is up to the caller to ensure this is true.
00014  */
00015 
00016 
00017 int _DSPCallTimedV(DSPFix48 *aTimeStampP,int hm_opcode,int nArgs,...);
00018 /*
00019  * Usage is int _DSPCallTimedV(aTimeStampP,hm_opcode,nArgs,arg1,...,ArgNargs);
00020  * Same as _DSPCallTimed() except that a variable number of host message 
00021  * arguments is specified explicitly in the argument list (using stdarg) 
00022  * rather than being passed in an array.
00023  */
00024 
00025 
00026 int _DSPResetTMQ(void);
00027 /*
00028  * Reset TMQ buffers to empty state and reset "current time" to 0.
00029  * Any waiting timed messages in the buffer are lost.
00030  */
00031 
00032 
00033 int _DSPForceIdle(void);
00034 /* 
00035  * Place DSP in the idle without any clean-up in the DSP.
00036  */
00037 
00038 #endif