making a clean nusmuk_audio lib

svn path=/trunk/externals/nusmuk/; revision=14307

1 files changed, 320 insertions, 0 deletions

diff --git a/nusmuk_audio/tabosci~.c b/nusmuk_audio/tabosci~.c
new file mode 100644
index 0000000..9936c77
--- /dev/null
+++ b/nusmuk_audio/tabosci~.c
@@ -0,0 +1,320 @@
+// tabosci~
+// tabosc interpolation
+// can replace tabosc4~
+// most of this code comes from pd. but with somes modifications
+
+/* 
+This software is copyrighted by Miller Puckette and others.  The following
+terms (the "Standard Improved BSD License") apply to all files associated with
+the software unless explicitly disclaimed in individual files:
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above  
+   copyright notice, this list of conditions and the following 
+   disclaimer in the documentation and/or other materials provided
+   with the distribution.
+3. The name of the author may not be used to endorse or promote
+   products derived from this software without specific prior 
+   written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,   
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+// Cyrille Henry 02 2009
+
+
+#include "m_pd.h"
+#include <math.h>
+
+#define max(a,b) ( ((a) > (b)) ? (a) : (b) ) 
+#define min(a,b) ( ((a) < (b)) ? (a) : (b) ) 
+
+/******************** tabosci~ ***********************/
+
+/* this is all copied from d_osc.c... what include file could this go in? */
+#define UNITBIT32 1572864.  /* 3*2^19; bit 32 has place value 1 */
+
+    /* machine-dependent definitions.  These ifdefs really
+    should have been by CPU type and not by operating system! */
+#ifdef IRIX
+    /* big-endian.  Most significant byte is at low address in memory */
+#define HIOFFSET 0    /* word offset to find MSB */
+#define LOWOFFSET 1    /* word offset to find LSB */
+#define int32 long  /* a data type that has 32 bits */
+#endif /* IRIX */
+
+#ifdef MSW
+    /* little-endian; most significant byte is at highest address */
+#define HIOFFSET 1
+#define LOWOFFSET 0
+#define int32 long
+#endif
+
+#if defined(__FreeBSD__) || defined(__APPLE__)
+#include <machine/endian.h>
+#endif
+
+#ifdef __linux__
+#include <endian.h>
+#endif
+
+#if defined(__unix__) || defined(__APPLE__)
+#if !defined(BYTE_ORDER) || !defined(LITTLE_ENDIAN)                         
+#error No byte order defined                                                    
+#endif                                                                          
+
+#if BYTE_ORDER == LITTLE_ENDIAN                                             
+#define HIOFFSET 1                                                              
+#define LOWOFFSET 0                                                             
+#else                                                                           
+#define HIOFFSET 0    /* word offset to find MSB */                             
+#define LOWOFFSET 1    /* word offset to find LSB */                            
+#endif /* __BYTE_ORDER */                                                       
+#include <sys/types.h>
+#define int32 int32_t
+#endif /* __unix__ or __APPLE__*/
+
+union tabfudge
+{
+    double tf_d;
+    int32 tf_i[2];
+};
+
+static t_class *tabosci_tilde_class;
+
+typedef struct _tabosci_tilde
+{
+    t_object x_obj;
+    t_float x_fnpoints;
+    t_float x_finvnpoints;
+    t_word *x_vec;
+    t_symbol *x_arrayname;
+    t_float x_f;
+    double x_phase;
+    t_float x_conv;
+    t_sample x_prev_in, x_last_in, x_prev_out, x_last_out;
+    t_float x_fa1, x_fa2, x_fb1, x_fb2, x_fb3; 
+    t_float cutoff;
+    t_int upsample;
+    t_float x_sr;
+} t_tabosci_tilde;
+
+void tabosci_tilde_cutoff(t_tabosci_tilde *x, t_float cut)
+{
+    x->cutoff = cut;
+
+    if (x->cutoff == 0)
+    {
+        x->x_fb1 = 1;
+        x->x_fb2 = 0;
+        x->x_fb3 = 0;
+        x->x_fa1 = 0;
+        x->x_fa2 = 0;
+
+        x->x_prev_in = 0;
+        x->x_last_in = 0;
+        x->x_prev_out = 0; // reset filter memory
+    }
+    else
+    {
+        // filter coef to cut all high freq.
+        t_float tmp1, tmp2;
+
+        tmp1 = sqrt(2)/2;
+        tmp1 = sinh(tmp1);
+
+        tmp2 = x->cutoff * 2 * 3.1415926 / (x->upsample * x->x_sr);
+	tmp2 = min(6.28,tmp2);
+
+        tmp1 *= sin(tmp2);
+        tmp2 = cos(tmp2);
+
+        x->x_fb1 = (1-tmp2 ) /2;
+        x->x_fb2 = (1-tmp2 );
+        x->x_fb3 = (1-tmp2 ) /2;
+        x->x_fa1 = -2 * tmp2;
+        x->x_fa2 = 1 - tmp1;
+	
+        tmp1 +=1;
+
+        x->x_fb1 /= tmp1;
+        x->x_fb2 /= tmp1;
+        x->x_fb3 /= tmp1;
+        x->x_fa1 /= tmp1;
+        x->x_fa2 /= tmp1;
+    }
+}
+
+static void *tabosci_tilde_new(t_symbol *s)
+{
+    t_tabosci_tilde *x = (t_tabosci_tilde *)pd_new(tabosci_tilde_class);
+    x->x_arrayname = s;
+    x->x_vec = 0;
+    x->x_fnpoints = 512.;
+    x->x_finvnpoints = (1./512.);
+    outlet_new(&x->x_obj, gensym("signal"));
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("ft1"));
+    x->x_f = 0;
+    x->cutoff = 0;
+    x->upsample = 1;
+    x->x_sr = 0;
+    tabosci_tilde_cutoff(x,0); // comput filter coef
+    return (x);
+}
+
+static t_int *tabosci_tilde_perform(t_int *w)
+{
+    t_tabosci_tilde *x = (t_tabosci_tilde *)(w[1]);
+    t_sample *in = (t_sample *)(w[2]);
+    t_sample *out = (t_sample *)(w[3]);
+    int n = (int)(w[4]);
+    int normhipart;
+    union tabfudge tf;
+    double a1,a2,a3; // CH : for the interpolation
+    t_float fnpoints = x->x_fnpoints;
+    int mask = fnpoints - 1;
+    t_float conv = fnpoints * x->x_conv;
+    int maxindex;
+    t_word *tab = x->x_vec, *addr;
+    int i;
+    double dphase = fnpoints * x->x_phase + UNITBIT32;
+
+    if (!tab) goto zero;
+    tf.tf_d = UNITBIT32;
+    normhipart = tf.tf_i[HIOFFSET];
+
+    while (n--)
+    {
+        t_sample frac,  a,  b,  c,  d, cminusb, temp, filter_out; 
+
+    	    for (i=0;i<x->upsample;i++)
+    	    {
+    	    tf.tf_d = dphase;
+    	    dphase += *in/x->upsample * conv;
+    	    addr = tab + (tf.tf_i[HIOFFSET] & mask);
+    	    a = addr[0].w_float;
+    	    addr = tab + ((1+tf.tf_i[HIOFFSET]) & mask);
+    	    b = addr[0].w_float;
+    	    addr = tab + ((2+tf.tf_i[HIOFFSET]) & mask);
+    	    c = addr[0].w_float;
+    	    addr = tab + ((3+tf.tf_i[HIOFFSET]) & mask);
+    	    d = addr[0].w_float;
+    	    tf.tf_i[HIOFFSET] = normhipart;
+    	    frac = tf.tf_d - UNITBIT32;
+
+    	    // 4-point, 3rd-order Hermite (x-form)
+    	    a1 = 0.5f * (c - a);
+    	    a2 = a - 2.5 * b + 2.f * c - 0.5f * d;
+    	    a3 = 0.5f * (d - a) + 1.5f * (b - c);
+
+    	    temp =  ((a3 * frac + a2) * frac + a1) * frac + b;
+
+    	    filter_out = x->x_fb1* temp + x->x_fb2 * x->x_last_in + x->x_fb3 * x->x_prev_in - x->x_fa1 * x->x_last_out - x->x_fa2 * x->x_prev_out; 
+    	    // low pass 
+
+    	    x->x_prev_in = x->x_last_in;
+    	    x->x_last_in = temp;
+    	    x->x_prev_out = x->x_last_out;
+    	    x->x_last_out = filter_out;
+    	    }
+        *out++ = x->x_last_out;
+        *in++;
+    }
+
+    tf.tf_d = UNITBIT32 * fnpoints;
+    normhipart = tf.tf_i[HIOFFSET];
+    tf.tf_d = dphase + (UNITBIT32 * fnpoints - UNITBIT32);
+    tf.tf_i[HIOFFSET] = normhipart;
+    x->x_phase = (tf.tf_d - UNITBIT32 * fnpoints)  * x->x_finvnpoints;
+    return (w+5);
+ zero:
+    while (n--) *out++ = 0;
+
+    return (w+5);
+}
+
+void tabosci_tilde_set(t_tabosci_tilde *x, t_symbol *s)
+{
+    t_garray *a;
+    int npoints, pointsinarray;
+
+    x->x_arrayname = s;
+    if (!(a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
+    {
+        if (*s->s_name)
+            pd_error(x, "tabosci~: %s: no such array", x->x_arrayname->s_name);
+        x->x_vec = 0;
+    }
+    else if (!garray_getfloatwords(a, &pointsinarray, &x->x_vec))
+    {
+        pd_error(x, "%s: bad template for tabosci~", x->x_arrayname->s_name);
+        x->x_vec = 0;
+    }
+    else
+    {
+        npoints = 1 << ilog2(pointsinarray);
+//        if ( npoints != pointsinarray) post("warning, tabosci~ is using only the first %d points of array %s",npoints, x->x_arrayname->s_name);
+        x->x_fnpoints = npoints;
+        x->x_finvnpoints = 1./npoints;
+        garray_usedindsp(a);
+    }
+}
+
+
+void tabosci_tilde_upsample(t_tabosci_tilde *x, t_float up)
+{
+    x->upsample = max(1,up);
+    tabosci_tilde_cutoff(x,x->cutoff);
+}
+
+static void tabosci_tilde_ft1(t_tabosci_tilde *x, t_float f)
+{
+    x->x_phase = f;
+}
+
+static void tabosci_tilde_dsp(t_tabosci_tilde *x, t_signal **sp)
+{
+    if (x->x_sr != sp[0]->s_sr)
+    {
+        x->x_sr = sp[0]->s_sr;
+        tabosci_tilde_cutoff(x,x->cutoff);
+        x->x_conv = 1. / sp[0]->s_sr;
+    }
+    tabosci_tilde_set(x, x->x_arrayname);
+    dsp_add(tabosci_tilde_perform, 4, x, sp[0]->s_vec, sp[1]->s_vec, sp[0]->s_n);
+}
+
+void tabosci_tilde_setup(void)
+{
+    tabosci_tilde_class = class_new(gensym("tabosci~"),
+        (t_newmethod)tabosci_tilde_new, 0,
+        sizeof(t_tabosci_tilde), 0, A_DEFSYM, 0);
+    CLASS_MAINSIGNALIN(tabosci_tilde_class, t_tabosci_tilde, x_f);
+    class_addmethod(tabosci_tilde_class, (t_method)tabosci_tilde_dsp,
+        gensym("dsp"), 0);
+    class_addmethod(tabosci_tilde_class, (t_method)tabosci_tilde_set,
+        gensym("set"), A_SYMBOL, 0);
+    class_addmethod(tabosci_tilde_class, (t_method)tabosci_tilde_cutoff,
+        gensym("cutoff"), A_FLOAT, 0);
+    class_addmethod(tabosci_tilde_class, (t_method)tabosci_tilde_upsample,
+        gensym("upsample"), A_FLOAT, 0);
+    class_addmethod(tabosci_tilde_class, (t_method)tabosci_tilde_ft1,
+        gensym("ft1"), A_FLOAT, 0);
+}
+