Add FS #10214. Initial commit of the original PDa code for the GSoC Pure Data plugin project of Wincent Balin. Stripped some non-sourcefiles and added a rockbox readme that needs a bit more info from Wincent. Is added to CATEGORIES and viewers, but not yet to SUBDIRS (ie doesn't build yet)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21044 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 254 insertions, 0 deletions

diff --git a/apps/plugins/pdbox/PDa/intern/env~.c b/apps/plugins/pdbox/PDa/intern/env~.c
new file mode 100644
index 0000000000..a9bf6998e1
--- /dev/null
+++ b/apps/plugins/pdbox/PDa/intern/env~.c
@@ -0,0 +1,254 @@
+
+#define FIXEDPOINT
+#include <m_pd.h>
+#include <m_fixed.h>
+
+
+#define MAXOVERLAP 10
+#define MAXVSTAKEN 64
+
+typedef struct sigenv
+{
+    t_object x_obj;                 /* header */
+    void *x_outlet;                 /* a "float" outlet */
+    void *x_clock;                  /* a "clock" object */
+    t_sample *x_buf;                /* a Hanning window */
+    int x_phase;                    /* number of points since last output */
+    int x_period;                   /* requested period of output */
+    int x_realperiod;               /* period rounded up to vecsize multiple */
+    int x_npoints;                  /* analysis window size in samples */
+    t_float x_result;               /* result to output */
+    t_sample x_sumbuf[MAXOVERLAP];          /* summing buffer */
+    t_float x_f;
+} t_sigenv;
+
+t_class *sigenv_class;
+static void sigenv_tick(t_sigenv *x);
+
+static void *sigenv_new(t_floatarg fnpoints, t_floatarg fperiod)
+{
+    int npoints = fnpoints;
+    int period = fperiod;
+    t_sigenv *x;
+    t_sample *buf;
+    int i;
+
+    if (npoints < 1) npoints = 1024;
+    if (period < 1) period = npoints/2;
+    if (period < npoints / MAXOVERLAP + 1)
+        period = npoints / MAXOVERLAP + 1;
+    if (!(buf = getbytes(sizeof(t_sample) * (npoints + MAXVSTAKEN))))
+    {
+        error("env: couldn't allocate buffer");
+        return (0);
+    }
+    x = (t_sigenv *)pd_new(sigenv_class);
+    x->x_buf = buf;
+    x->x_npoints = npoints;
+    x->x_phase = 0;
+    x->x_period = period;
+    for (i = 0; i < MAXOVERLAP; i++) x->x_sumbuf[i] = 0;
+    for (i = 0; i < npoints; i++)
+        buf[i] = ftofix((1. - cos((2 * 3.14159 * i) / npoints))/npoints);
+    for (; i < npoints+MAXVSTAKEN; i++) buf[i] = 0;
+    x->x_clock = clock_new(x, (t_method)sigenv_tick);
+    x->x_outlet = outlet_new(&x->x_obj, gensym("float"));
+    x->x_f = 0;
+    return (x);
+}
+
+static t_int *sigenv_perform(t_int *w)
+{
+    t_sigenv *x = (t_sigenv *)(w[1]);
+    t_sample *in = (t_sample *)(w[2]);
+    int n = (int)(w[3]);
+    int count;
+    t_sample *sump; 
+    in += n;
+    for (count = x->x_phase, sump = x->x_sumbuf;
+        count < x->x_npoints; count += x->x_realperiod, sump++)
+    {
+        t_sample *hp = x->x_buf + count;
+        t_sample *fp = in;
+        t_sample sum = *sump;
+        int i;
+        
+        for (i = 0; i < n; i++)
+        {
+            fp--;
+            sum += *hp++ * ((*fp * *fp)>>16)>>16;
+        }
+        *sump = sum;
+    }
+    sump[0] = 0;
+    x->x_phase -= n;
+    if (x->x_phase < 0)
+    {
+        x->x_result = x->x_sumbuf[0];
+        for (count = x->x_realperiod, sump = x->x_sumbuf;
+            count < x->x_npoints; count += x->x_realperiod, sump++)
+                sump[0] = sump[1];
+        sump[0] = 0;
+        x->x_phase = x->x_realperiod - n;
+        clock_delay(x->x_clock, 0L);
+    }
+    return (w+4);
+}
+
+static void sigenv_dsp(t_sigenv *x, t_signal **sp)
+{
+    if (x->x_period % sp[0]->s_n) x->x_realperiod =
+        x->x_period + sp[0]->s_n - (x->x_period % sp[0]->s_n);
+    else x->x_realperiod = x->x_period;
+    dsp_add(sigenv_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
+    if (sp[0]->s_n > MAXVSTAKEN) bug("sigenv_dsp");
+}
+
+static void sigenv_tick(t_sigenv *x)    /* callback function for the clock */
+{
+    outlet_float(x->x_outlet, powtodb(x->x_result*3.051757e-05));
+}
+
+static void sigenv_ff(t_sigenv *x)              /* cleanup on free */
+{
+    clock_free(x->x_clock);
+    freebytes(x->x_buf, (x->x_npoints + MAXVSTAKEN) * sizeof(float));
+}
+
+
+void env_tilde_setup(void )
+{
+    sigenv_class = class_new(gensym("env~"), (t_newmethod)sigenv_new,
+        (t_method)sigenv_ff, sizeof(t_sigenv), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
+    CLASS_MAINSIGNALIN(sigenv_class, t_sigenv, x_f);
+    class_addmethod(sigenv_class, (t_method)sigenv_dsp, gensym("dsp"), 0);
+}
+
+
+
+#define FIXEDPOINT
+#include <m_pd.h>
+#include <m_fixed.h>
+
+
+#define MAXOVERLAP 10
+#define MAXVSTAKEN 64
+
+typedef struct sigenv
+{
+    t_object x_obj;                 /* header */
+    void *x_outlet;                 /* a "float" outlet */
+    void *x_clock;                  /* a "clock" object */
+    t_sample *x_buf;                /* a Hanning window */
+    int x_phase;                    /* number of points since last output */
+    int x_period;                   /* requested period of output */
+    int x_realperiod;               /* period rounded up to vecsize multiple */
+    int x_npoints;                  /* analysis window size in samples */
+    t_float x_result;               /* result to output */
+    t_sample x_sumbuf[MAXOVERLAP];          /* summing buffer */
+    t_float x_f;
+} t_sigenv;
+
+t_class *sigenv_class;
+static void sigenv_tick(t_sigenv *x);
+
+static void *sigenv_new(t_floatarg fnpoints, t_floatarg fperiod)
+{
+    int npoints = fnpoints;
+    int period = fperiod;
+    t_sigenv *x;
+    t_sample *buf;
+    int i;
+
+    if (npoints < 1) npoints = 1024;
+    if (period < 1) period = npoints/2;
+    if (period < npoints / MAXOVERLAP + 1)
+        period = npoints / MAXOVERLAP + 1;
+    if (!(buf = getbytes(sizeof(t_sample) * (npoints + MAXVSTAKEN))))
+    {
+        error("env: couldn't allocate buffer");
+        return (0);
+    }
+    x = (t_sigenv *)pd_new(sigenv_class);
+    x->x_buf = buf;
+    x->x_npoints = npoints;
+    x->x_phase = 0;
+    x->x_period = period;
+    for (i = 0; i < MAXOVERLAP; i++) x->x_sumbuf[i] = 0;
+    for (i = 0; i < npoints; i++)
+        buf[i] = ftofix((1. - cos((2 * 3.14159 * i) / npoints))/npoints);
+    for (; i < npoints+MAXVSTAKEN; i++) buf[i] = 0;
+    x->x_clock = clock_new(x, (t_method)sigenv_tick);
+    x->x_outlet = outlet_new(&x->x_obj, gensym("float"));
+    x->x_f = 0;
+    return (x);
+}
+
+static t_int *sigenv_perform(t_int *w)
+{
+    t_sigenv *x = (t_sigenv *)(w[1]);
+    t_sample *in = (t_sample *)(w[2]);
+    int n = (int)(w[3]);
+    int count;
+    t_sample *sump; 
+    in += n;
+    for (count = x->x_phase, sump = x->x_sumbuf;
+        count < x->x_npoints; count += x->x_realperiod, sump++)
+    {
+        t_sample *hp = x->x_buf + count;
+        t_sample *fp = in;
+        t_sample sum = *sump;
+        int i;
+        
+        for (i = 0; i < n; i++)
+        {
+            fp--;
+            sum += *hp++ * ((*fp * *fp)>>16)>>16;
+        }
+        *sump = sum;
+    }
+    sump[0] = 0;
+    x->x_phase -= n;
+    if (x->x_phase < 0)
+    {
+        x->x_result = x->x_sumbuf[0];
+        for (count = x->x_realperiod, sump = x->x_sumbuf;
+            count < x->x_npoints; count += x->x_realperiod, sump++)
+                sump[0] = sump[1];
+        sump[0] = 0;
+        x->x_phase = x->x_realperiod - n;
+        clock_delay(x->x_clock, 0L);
+    }
+    return (w+4);
+}
+
+static void sigenv_dsp(t_sigenv *x, t_signal **sp)
+{
+    if (x->x_period % sp[0]->s_n) x->x_realperiod =
+        x->x_period + sp[0]->s_n - (x->x_period % sp[0]->s_n);
+    else x->x_realperiod = x->x_period;
+    dsp_add(sigenv_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
+    if (sp[0]->s_n > MAXVSTAKEN) bug("sigenv_dsp");
+}
+
+static void sigenv_tick(t_sigenv *x)    /* callback function for the clock */
+{
+    outlet_float(x->x_outlet, powtodb(x->x_result*3.051757e-05));
+}
+
+static void sigenv_ff(t_sigenv *x)              /* cleanup on free */
+{
+    clock_free(x->x_clock);
+    freebytes(x->x_buf, (x->x_npoints + MAXVSTAKEN) * sizeof(float));
+}
+
+
+void env_tilde_setup(void )
+{
+    sigenv_class = class_new(gensym("env~"), (t_newmethod)sigenv_new,
+        (t_method)sigenv_ff, sizeof(t_sigenv), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
+    CLASS_MAINSIGNALIN(sigenv_class, t_sigenv, x_f);
+    class_addmethod(sigenv_class, (t_method)sigenv_dsp, gensym("dsp"), 0);
+}
+
+