From d0ae3caca5828675335d3b19ab5dd987e7369b23 Mon Sep 17 00:00:00 2001 From: Tim Blechmann Date: Wed, 14 Jul 2004 16:21:44 +0000 Subject: This commit was generated by cvs2svn to compensate for changes in r1857, which included commits to RCS files with non-trunk default branches. svn path=/trunk/externals/tb/; revision=1858 --- sc4pd/headers/plugin_interface/SC_SndBuf.h | 109 +++++++++++++++++++++++++++++ 1 file changed, 109 insertions(+) create mode 100644 sc4pd/headers/plugin_interface/SC_SndBuf.h (limited to 'sc4pd/headers/plugin_interface/SC_SndBuf.h') diff --git a/sc4pd/headers/plugin_interface/SC_SndBuf.h b/sc4pd/headers/plugin_interface/SC_SndBuf.h new file mode 100644 index 0000000..affd2b9 --- /dev/null +++ b/sc4pd/headers/plugin_interface/SC_SndBuf.h @@ -0,0 +1,109 @@ +/* + SuperCollider real time audio synthesis system + Copyright (c) 2002 James McCartney. All rights reserved. + http://www.audiosynth.com + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +#ifndef _SndBuf_ +#define _SndBuf_ + +#include +#include + +struct SndBuf +{ + double samplerate; + double sampledur; // = 1/ samplerate + float *data; + int channels; + int samples; + int frames; + int mask; // for delay lines + int mask1; // for interpolating oscillators. + int coord; // used by fft ugens + SNDFILE *sndfile; // used by disk i/o +}; +typedef struct SndBuf SndBuf; + +struct SndBufUpdates +{ + int reads; + int writes; +}; +typedef struct SndBufUpdates SndBufUpdates; + +enum { coord_None, coord_Complex, coord_Polar }; + + +inline float PhaseFrac(unsigned long inPhase) + { + union { unsigned long itemp; float ftemp; } u; + u.itemp = 0x3F800000 | (0x007FFF80 & ((inPhase)<<7)); + return u.ftemp - 1.f; + } + +inline float PhaseFrac1(unsigned long inPhase) + { + union { unsigned long itemp; float ftemp; } u; + u.itemp = 0x3F800000 | (0x007FFF80 & ((inPhase)<<7)); + return u.ftemp; + } + +inline float lookup(float *table, int32 phase, int32 mask) +{ + return table[(phase >> 16) & mask]; +} + + +#define xlobits 14 +#define xlobits1 13 + +inline float lookupi(float *table, uint32 phase, uint32 mask) +{ + float frac = PhaseFrac(phase); + float *tbl = table + ((phase >> 16) & mask); + float a = tbl[0]; + float b = tbl[1]; + return a + frac * (b - a); +} + +inline float lookupi2(float *table, uint32 phase, uint32 mask) +{ + float frac = PhaseFrac1(phase); + float *tbl = table + ((phase >> 16) & mask); + float a = tbl[0]; + float b = tbl[1]; + return a + frac * b; +} + +inline float lookupi1(float* table0, float* table1, uint32 pphase, int32 lomask) +{ + float pfrac = PhaseFrac1(pphase); + uint32 index = ((pphase >> xlobits1) & lomask); + float val1 = *(float*)((char*)table0 + index); + float val2 = *(float*)((char*)table1 + index); + return val1 + val2 * pfrac; +} + + +inline float lininterp(float x, float a, float b) +{ + return a + x * (b - a); +} + + +#endif -- cgit v1.2.1