0d4560cb03
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21626 a1c6a512-1295-4272-9138-f99709370657
102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
#include <m_pd.h>
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#include <m_fixed.h>
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static t_class *line_class;
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typedef struct _line
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{
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t_object x_obj;
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t_sample x_target;
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t_sample x_value;
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t_sample x_biginc;
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t_sample x_inc;
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t_sample x_1overn;
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t_sample x_msectodsptick;
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t_floatarg x_inletvalue;
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t_floatarg x_inletwas;
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int x_ticksleft;
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int x_retarget;
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} t_line;
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static t_int *line_perform(t_int *w)
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{
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t_line *x = (t_line *)(w[1]);
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t_sample *out = (t_sample *)(w[2]);
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int n = (int)(w[3]);
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#ifndef ROCKBOX
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t_sample f = x->x_value;
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#endif
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if (x->x_retarget)
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{
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int nticks = mult(ftofix(x->x_inletwas),x->x_msectodsptick);
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if (!nticks) nticks = itofix(1);
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x->x_ticksleft = fixtoi(nticks);
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x->x_biginc = (x->x_target - x->x_value);
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x->x_biginc = idiv(x->x_biginc,nticks);
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x->x_inc = mult(x->x_1overn, x->x_biginc);
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x->x_retarget = 0;
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}
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if (x->x_ticksleft)
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{
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t_sample f = x->x_value;
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while (n--) *out++ = f, f += x->x_inc;
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x->x_value += x->x_biginc;
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x->x_ticksleft--;
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}
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else
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{
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x->x_value = x->x_target;
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while (n--) *out++ = x->x_value;
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}
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return (w+4);
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}
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static void line_float(t_line *x, t_float f)
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{
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if (x->x_inletvalue <= 0)
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{
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x->x_target = x->x_value = ftofix(f);
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x->x_ticksleft = x->x_retarget = 0;
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}
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else
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{
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x->x_target = ftofix(f);
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x->x_retarget = 1;
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x->x_inletwas = x->x_inletvalue;
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x->x_inletvalue = 0;
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}
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}
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static void line_stop(t_line *x)
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{
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x->x_target = x->x_value;
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x->x_ticksleft = x->x_retarget = 0;
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}
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static void line_dsp(t_line *x, t_signal **sp)
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{
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dsp_add(line_perform, 3, x, sp[0]->s_vec, sp[0]->s_n);
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x->x_1overn = ftofix(1)/sp[0]->s_n;
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x->x_msectodsptick = idiv(sp[0]->s_sr, (1000 * sp[0]->s_n));
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}
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static void *line_new(void)
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{
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t_line *x = (t_line *)pd_new(line_class);
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outlet_new(&x->x_obj, gensym("signal"));
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floatinlet_new(&x->x_obj, &x->x_inletvalue);
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x->x_ticksleft = x->x_retarget = 0;
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x->x_value = x->x_target = x->x_inletvalue = x->x_inletwas = 0;
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return (x);
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}
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void line_tilde_setup(void)
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{
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line_class = class_new(gensym("line~"), line_new, 0,
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sizeof(t_line), 0, 0);
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class_addfloat(line_class, (t_method)line_float);
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class_addmethod(line_class, (t_method)line_dsp, gensym("dsp"), 0);
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class_addmethod(line_class, (t_method)line_stop, gensym("stop"), 0);
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}
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