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-rw-r--r--puredata/pdp_ut.c262
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diff --git a/puredata/pdp_ut.c b/puredata/pdp_ut.c
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+/*
+ * Pure Data Packet - Utility toolkit objects.
+ * Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+
+/* This file contains some small utility pd objects that make working with
+ pdp objects a lot easier. Mainly as glue to be used in the abstractions
+ in the distro. */
+
+
+#include "pdp_pd.h"
+#include <math.h>
+
+/* this object does an add, scale, clip operation */
+
+t_class *pdp_ut_addscaleclip_class;
+
+typedef struct pdp_ut_addscaleclip_struct
+{
+ t_object x_obj;
+ t_outlet *x_outlet0;
+ t_float x_min;
+ t_float x_max;
+ t_float x_offset;
+ t_float x_scale;
+} t_pdp_ut_addscaleclip;
+
+
+static void pdp_ut_addscaleclip_float(t_pdp_ut_addscaleclip *x, t_floatarg f)
+{
+ f += x->x_offset;
+ f *= x->x_scale;
+ f = (f < x->x_min) ? x->x_min : f;
+ f = (f > x->x_max) ? x->x_max : f;
+ outlet_float(x->x_outlet0, f);
+}
+
+static void pdp_ut_addscaleclip_free(t_pdp_ut_addscaleclip *x){}
+
+void *pdp_ut_addscaleclip_new(t_floatarg offset, t_floatarg scale, t_floatarg min, t_floatarg max)
+{
+ t_pdp_ut_addscaleclip *x = (t_pdp_ut_addscaleclip *)pd_new(pdp_ut_addscaleclip_class);
+ x->x_outlet0 = outlet_new(&x->x_obj, &s_float);
+ x->x_offset = offset;
+ x->x_scale = scale;
+ x->x_min = min;
+ x->x_max = max;
+ return (void *)x;
+}
+
+void pdp_ut_addscaleclip_setup(void)
+{
+ pdp_ut_addscaleclip_class = class_new(gensym("pdp_ut_addscaleclip"), (t_newmethod)pdp_ut_addscaleclip_new,
+ (t_method)pdp_ut_addscaleclip_free, sizeof(t_pdp_ut_addscaleclip), 0,
+ A_FLOAT, A_FLOAT, A_FLOAT, A_FLOAT, A_NULL);
+ class_addfloat(pdp_ut_addscaleclip_class, pdp_ut_addscaleclip_float);
+}
+
+
+/* pdp_ut_logmap does a logarithmic parameter mapping [0->1] x -> min(max/min)^x max an add, scale, clip operation */
+/* pdp_ut_logmap_comp does x -> min(max/min)^(1-x) */
+/* pdp_ut_linmap dos x -> min + (max - min * x */
+
+t_class *pdp_ut_linmap_class;
+t_class *pdp_ut_logmap_class;
+t_class *pdp_ut_logmap_comp_class;
+
+typedef struct pdp_ut_map_struct
+{
+ t_object x_obj;
+ t_outlet *x_outlet0;
+ t_float x_min;
+ t_float x_max;
+} t_pdp_ut_map;
+
+
+static void pdp_ut_logmap_float(t_pdp_ut_map *x, t_floatarg f)
+{
+ f = (f < 0.0f) ? 0.0f : f;
+ f = (f > 1.0f) ? 1.0f : f;
+
+ f = x->x_min * pow((x->x_max / x->x_min), f);
+
+ outlet_float(x->x_outlet0, f);
+}
+
+static void pdp_ut_linmap_float(t_pdp_ut_map *x, t_floatarg f)
+{
+ f = (f < 0.0f) ? 0.0f : f;
+ f = (f > 1.0f) ? 1.0f : f;
+
+ f = x->x_min + ((x->x_max - x->x_min) * f);
+
+ outlet_float(x->x_outlet0, f);
+}
+
+static void pdp_ut_logmap_comp_float(t_pdp_ut_map *x, t_floatarg f)
+{
+ f = (f < 0.0f) ? 0.0f : f;
+ f = (f > 1.0f) ? 1.0f : f;
+
+ f = x->x_min * pow((x->x_max / x->x_min), (1.0f - f));
+
+ outlet_float(x->x_outlet0, f);
+}
+
+static void pdp_ut_map_free(t_pdp_ut_map *x){}
+
+
+void pdp_ut_map_init(t_pdp_ut_map *x, t_floatarg min, t_floatarg max)
+{
+ x->x_outlet0 = outlet_new(&x->x_obj, &s_float);
+ x->x_min = min;
+ x->x_max = max;
+}
+
+void *pdp_ut_logmap_new(t_floatarg min, t_floatarg max)
+{
+ t_pdp_ut_map *x = (t_pdp_ut_map *)pd_new(pdp_ut_logmap_class);
+ pdp_ut_map_init(x, min, max);
+ return (void *)x;
+}
+
+void *pdp_ut_linmap_new(t_floatarg min, t_floatarg max)
+{
+ t_pdp_ut_map *x = (t_pdp_ut_map *)pd_new(pdp_ut_linmap_class);
+ pdp_ut_map_init(x, min, max);
+ return (void *)x;
+}
+
+void *pdp_ut_logmap_comp_new(t_floatarg min, t_floatarg max)
+{
+ t_pdp_ut_map *x = (t_pdp_ut_map *)pd_new(pdp_ut_logmap_comp_class);
+ pdp_ut_map_init(x, min, max);
+ return (void *)x;
+}
+
+void pdp_ut_logmap_setup(void)
+{
+ pdp_ut_logmap_class = class_new(gensym("pdp_ut_logmap"), (t_newmethod)pdp_ut_logmap_new,
+ (t_method)pdp_ut_map_free, sizeof(t_pdp_ut_map), 0,
+ A_FLOAT, A_FLOAT, A_NULL);
+ class_addfloat(pdp_ut_logmap_class, pdp_ut_logmap_float);
+}
+
+void pdp_ut_logmap_comp_setup(void)
+{
+ pdp_ut_logmap_comp_class = class_new(gensym("pdp_ut_logmap_comp"), (t_newmethod)pdp_ut_logmap_comp_new,
+ (t_method)pdp_ut_map_free, sizeof(t_pdp_ut_map), 0,
+ A_FLOAT, A_FLOAT, A_NULL);
+ class_addfloat(pdp_ut_logmap_comp_class, pdp_ut_logmap_comp_float);
+}
+
+void pdp_ut_linmap_setup(void)
+{
+ pdp_ut_linmap_class = class_new(gensym("pdp_ut_linmap"), (t_newmethod)pdp_ut_linmap_new,
+ (t_method)pdp_ut_map_free, sizeof(t_pdp_ut_map), 0,
+ A_FLOAT, A_FLOAT, A_NULL);
+ class_addfloat(pdp_ut_linmap_class, pdp_ut_linmap_float);
+}
+
+
+
+t_class *pdp_ut_rgb2ycrcb_class;
+
+typedef struct pdp_ut_rgb2ycrcb
+{
+ t_object x_obj;
+ t_outlet *x_outlet_luma;
+ t_outlet *x_outlet_chroma_red;
+ t_outlet *x_outlet_chroma_blue;
+
+ t_float x_red, x_green, x_blue;
+
+} t_pdp_ut_rgb2ycrcb;
+
+
+static void pdp_ut_rgb2ycrcb_bang (t_pdp_ut_rgb2ycrcb* x)
+{
+
+ float luma = 0.299f * x->x_red + 0.587f * x->x_green + 0.114f * x->x_blue;
+ float chroma_red = (x->x_red - luma) * 0.713f;
+ float chroma_blue = (x->x_blue - luma) * 0.565f;
+
+ outlet_float(x->x_outlet_chroma_blue, chroma_blue);
+ outlet_float(x->x_outlet_chroma_red, chroma_red);
+ outlet_float(x->x_outlet_luma, luma);
+
+}
+
+
+static void pdp_ut_rgb2ycrcb_red (t_pdp_ut_rgb2ycrcb* x, t_floatarg f) {x->x_red = f; pdp_ut_rgb2ycrcb_bang(x);}
+static void pdp_ut_rgb2ycrcb_green (t_pdp_ut_rgb2ycrcb* x, t_floatarg f) {x->x_green = f; pdp_ut_rgb2ycrcb_bang(x);}
+static void pdp_ut_rgb2ycrcb_blue (t_pdp_ut_rgb2ycrcb* x, t_floatarg f) {x->x_blue = f; pdp_ut_rgb2ycrcb_bang(x);}
+
+
+
+static void pdp_ut_rgb2ycrcb_free (t_pdp_ut_rgb2ycrcb* x) {}
+static void* pdp_ut_rgb2ycrcb_new(void)
+{
+ t_pdp_ut_rgb2ycrcb *x = (t_pdp_ut_rgb2ycrcb *)pd_new(pdp_ut_rgb2ycrcb_class);
+
+
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("green"));
+ inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("blue"));
+
+ x->x_outlet_luma = outlet_new(&x->x_obj, &s_float);
+ x->x_outlet_chroma_red = outlet_new(&x->x_obj, &s_float);
+ x->x_outlet_chroma_blue = outlet_new(&x->x_obj, &s_float);
+
+ x->x_red = 0.0f;
+ x->x_green = 0.0f;
+ x->x_blue = 0.0f;
+
+
+ return (void *)x;
+}
+
+void pdp_ut_rgb2ycrcb_setup(void)
+{
+ pdp_ut_rgb2ycrcb_class = class_new(gensym("pdp_ut_rgb2ycrcb"), (t_newmethod)pdp_ut_rgb2ycrcb_new,
+ (t_method)pdp_ut_rgb2ycrcb_free, sizeof(t_pdp_ut_rgb2ycrcb), 0, A_NULL);
+ class_addfloat(pdp_ut_rgb2ycrcb_class, pdp_ut_rgb2ycrcb_red);
+ class_addmethod(pdp_ut_rgb2ycrcb_class, (t_method)pdp_ut_rgb2ycrcb_green, gensym("green"), A_FLOAT, A_NULL);
+ class_addmethod(pdp_ut_rgb2ycrcb_class, (t_method)pdp_ut_rgb2ycrcb_blue, gensym("blue"), A_FLOAT, A_NULL);
+}
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+void pdp_ut_setup(void)
+{
+ pdp_ut_addscaleclip_setup();
+ pdp_ut_logmap_setup();
+ pdp_ut_logmap_comp_setup();
+ pdp_ut_linmap_setup();
+ pdp_ut_rgb2ycrcb_setup();
+}
+
+
+#ifdef __cplusplus
+}
+#endif
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