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/*
crossfm.h:
Copyright (C) 2005 Francois Pinot
This file is part of Csound.
The Csound Library is free software; you can redistribute it
and/or modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
Csound is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with Csound; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*********************************************************************/
/* Header file for the plugin opcode crossfm */
/* */
/* crossfm implements a crossed frequency modulation algorithm. */
/* The audio-rate output of oscillator #1 is used to modulate the */
/* frequency input of oscillator #2 and the audio-rate output of */
/* oscillator #2 is used to modulate the frequency input of */
/* oscillator #1. */
/* */
/* a1,a2 crossfm xfrq1, xfrq2, xndx1, xndx2, kcps, ifn1, ifn2 */
/* [, iphs1] [, iphs2] */
/* */
/* kcps - base frequency */
/* xfrq1 - frequency multiplier for oscillator #1. Oscillator #1 */
/* effective frequency is kcps * xfrq1 */
/* xfrq2 - frequency multiplier for oscillator #2. Oscillator #2 */
/* effective frequency is kcps * xfrq2 */
/* xndx1 - index of the modulation of oscillator #2 by oscillator #1 */
/* xndx2 - index of the modulation of oscillator #1 by oscillator #2 */
/* ifn1 - function table number for oscillator #1 */
/* ifn2 - function table number for oscillator #2 */
/* iphs1 - optional, initial phase of waveform in table #1 */
/* iphs2 - optional, initial phase of waveform in table #2 */
/* */
/*********************************************************************/
typedef struct {
OPDS h; /* common to all opcodes */
MYFLT *aout1, *aout2; /* output args */
MYFLT *xfrq1, *xfrq2, *xndx1, *xndx2; /* input args */
MYFLT *kcps, *ifn1, *ifn2; /* input args */
MYFLT *iphs1, *iphs2; /* input args */
MYFLT phase1, phase2; /* phase of oscillators */
MYFLT sig1, sig2; /* a-rate oscillators outputs */
MYFLT siz1, siz2; /* size of function tables */
FUNC *ftp1, *ftp2; /* function table pointers */
short frq1adv, frq2adv, ndx1adv, ndx2adv; /* increment values for xargs */
/* pointers (0 for i-rate and */
/* k-rate, 1 for a-rate args */
} CROSSFM;
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