00001 /* 00002 $Id: DswitchtUG.h 3255 2005-05-14 03:27:27Z leighsmith $ 00003 00004 Defined In: The MusicKit 00005 Description: 00006 DswitchtUG - from dsp macro /usr/lib/dsp/ugsrc/dswitcht.asm (see source for details). 00007 00008 The DswitchtUG switches from input1 (scaled by scale1) to a 00009 input2 (scaled by scale2) after a delay specified in samples. The delay 00010 can be interpreted as the number of samples input1 is passed to 00011 the output. On each output sample, the delay is decremented by 1. 00012 Input1 times the scale factor scale1 is passed to the output as long 00013 as delay remains nonnegative. Afterwards, input2 is passed 00014 to the output with its own scaling. 00015 00016 You instantiate a subclass of the form 00017 DswitchtUG<a><b>, where 00018 <a> = space of output 00019 <b> = space of inputs 00020 00021 Original Author: David A. Jaffe 00022 00023 Copyright (c) 1988-1992, NeXT Computer, Inc. 00024 Portions Copyright (c) 1994 NeXT Computer, Inc. and reproduced under license from NeXT 00025 Portions Copyright (c) 1994 Stanford University. 00026 Portions Copyright (c) 1999-2001, The MusicKit Project. 00027 */ 00028 // classgroup Delays and Time-Modification Units 00051 #ifndef __MK_DswitchtUG_H___ 00052 #define __MK_DswitchtUG_H___ 00053 00054 #import <MusicKit/MKUnitGenerator.h> 00055 00056 @interface DswitchtUG : MKUnitGenerator 00057 00066 +(BOOL)shouldOptimize:(unsigned) arg; 00067 /* Specifies that all arguments are to be optimized if possible except the 00068 delay counter. */ 00069 00070 00080 -setInput1: (id) aPatchPoint; 00081 /* Sets input1 to specified patchPoint. */ 00082 00083 00093 -setInput2: (id) aPatchPoint; 00094 /* Sets input2 to specified patchPoint. */ 00095 00096 00106 - setOutput: (id) aPatchPoint; 00107 00113 - setScale1: (double) scale; 00114 00120 - setScale2: (double) scale; 00121 00135 - setDelayTicks: (int) count; 00136 /* Sets delay in ticks (units of DSPMK_NTICK). 00137 A negative value will switch immediately to input2. */ 00138 00139 00151 -idleSelf; 00152 /* Patches output to sink. */ 00153 00154 @end 00155 00156 #endif
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