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-rw-r--r--modules/pdp_gradient.c331
1 files changed, 331 insertions, 0 deletions
diff --git a/modules/pdp_gradient.c b/modules/pdp_gradient.c
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+++ b/modules/pdp_gradient.c
@@ -0,0 +1,331 @@
+/*
+ * Pure Data Packet module.
+ * 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.
+ *
+ */
+
+
+
+#include "pdp.h"
+
+
+typedef struct yv12_palette_struct
+{
+ short int y;
+ short int u;
+ short int v;
+} t_yv12_palette;
+
+typedef struct pdp_gradient_struct
+{
+ t_object x_obj;
+ t_float x_f;
+
+ t_outlet *x_outlet0;
+
+ int x_packet0;
+ int x_dropped;
+ int x_queue_id;
+
+ t_yv12_palette x_palette[512];
+
+} t_pdp_gradient;
+
+
+unsigned int float2fixed(float f)
+{
+ f *= 0x8000;
+ if(f>0x7fff) f = 0x7fff;
+ if(f<-0x7fff) f = -0x7fff;
+ return (short int)f;
+}
+
+static void pdp_gradient_yuv_index(t_pdp_gradient *x,
+ t_floatarg index,
+ t_floatarg y,
+ t_floatarg u,
+ t_floatarg v)
+{
+ int i = ((int)index) & 511;
+ x->x_palette[i].y = float2fixed(y);
+ x->x_palette[i].u = float2fixed(u);
+ x->x_palette[i].v = float2fixed(v);
+}
+
+static void pdp_gradient_yuv(t_pdp_gradient *x,
+ t_floatarg y,
+ t_floatarg u,
+ t_floatarg v)
+{
+ int i;
+ float inc = 1.0f / 256.0f;
+ float frac = -1.0f;
+ for(i=-256; i<256; i++) {
+ pdp_gradient_yuv_index(x, i, frac*y, frac*u, frac*v);
+ frac += inc;
+ }
+}
+
+static void pdp_gradient_rgb_index(t_pdp_gradient *x,
+ t_floatarg index,
+ t_floatarg r,
+ t_floatarg g,
+ t_floatarg b)
+{
+ float y,u,v;
+
+
+ y = 0.299f * r + 0.587f * g + 0.114f * b;
+ u = (r-y) * 0.713f;
+ v = (b-y) * 0.565f;
+
+ pdp_gradient_yuv_index(x, index, y,u,v);
+}
+
+static void pdp_gradient_rgb(t_pdp_gradient *x,
+ t_floatarg r,
+ t_floatarg g,
+ t_floatarg b)
+{
+ int i;
+ float inc = 1.0f / 256.0f;
+ float frac = -1.0f;
+ for(i=-256; i<256; i++) {
+ pdp_gradient_rgb_index(x, i, frac*r, frac*g, frac*b);
+ frac += inc;
+ }
+}
+
+/*
+static void pdp_gradient_hsv_index(t_pdp_gradient *x,
+ t_floatarg index,
+ t_floatarg h,
+ t_floatarg s,
+ t_floatarg v)
+{
+ float r,g,b;
+
+ r = h;
+ g = s;
+ b = v;
+
+ pdp_gradient_rgb_index(x, index, r,g,b);
+}
+
+static void pdp_gradient_hsv(t_pdp_gradient *x,
+ t_floatarg h,
+ t_floatarg s,
+ t_floatarg v)
+{
+ int i;
+ float inc = 1.0f / 256.0f;
+ float frac = -1.0f;
+ for(i=-256; i<256; i++) {
+ pdp_gradient_hsv_index(x, i, h, s, frac*v);
+ frac += inc;
+ }
+}
+*/
+
+static void pdp_gradient_process_grey(t_pdp_gradient *x)
+{
+ t_pdp *header = pdp_packet_header(x->x_packet0);
+ short int *data = (short int *)pdp_packet_data (x->x_packet0);
+ t_pdp *newheader = 0;
+ short int *newdata = 0;
+ int newpacket = -1;
+
+ unsigned int w = header->info.image.width;
+ unsigned int h = header->info.image.height;
+
+ unsigned int size = w*h;
+ unsigned int totalnbpixels = size;
+ unsigned int u_offset = size;
+ unsigned int v_offset = size + (size>>2);
+
+ unsigned int row, col;
+
+ newpacket = pdp_packet_new(PDP_IMAGE, (size + (size>>1))<<1);
+ newheader = pdp_packet_header(newpacket);
+ newdata = (short int *)pdp_packet_data(newpacket);
+
+ newheader->info.image.encoding = PDP_IMAGE_YV12;
+ newheader->info.image.width = w;
+ newheader->info.image.height = h;
+
+ /* convert every pixel according to palette */
+ for(row=0; row < size; row += (w<<1)){
+ for(col=0; col < w; col += 2){
+ short int u_acc, v_acc;
+ short int grey;
+
+ /* top left pixel */
+ grey = ((data[row+col])>>7) & 511;
+ newdata[row+col] = x->x_palette[grey].y;
+ u_acc = (x->x_palette[grey].u)>>2;
+ v_acc = (x->x_palette[grey].v)>>2;
+
+ /* top right pixel */
+ grey = ((data[row+col+1])>>7) & 511;
+ newdata[row+col+1] = x->x_palette[grey].y;
+ u_acc += (x->x_palette[grey].u)>>2;
+ v_acc += (x->x_palette[grey].v)>>2;
+
+ /* bottom left pixel */
+ grey = ((data[row+col+w])>>7) & 511;
+ newdata[row+col+w] = x->x_palette[grey].y;
+ u_acc += (x->x_palette[grey].u)>>2;
+ v_acc += (x->x_palette[grey].v)>>2;
+
+ /* bottom right pixel */
+ grey = ((data[row+col+w+1])>>7) & 511;
+ newdata[row+col+w+1] = x->x_palette[grey].y;
+ u_acc += (x->x_palette[grey].u)>>2;
+ v_acc += (x->x_palette[grey].v)>>2;
+
+ /* store uv comp */
+ newdata[u_offset + (row>>2) + (col>>1)] = u_acc;
+ newdata[v_offset + (row>>2) + (col>>1)] = v_acc;
+ }
+ }
+
+
+
+ /* delete source packet and replace with new packet */
+ pdp_packet_mark_unused(x->x_packet0);
+ x->x_packet0 = newpacket;
+ return;
+}
+
+static void pdp_gradient_process_yv12(t_pdp_gradient *x)
+{
+ /* pdp_gradient_process only the luminance channel */
+ pdp_gradient_process_grey(x);
+}
+
+
+
+static void pdp_gradient_process(t_pdp_gradient *x)
+{
+ int encoding;
+ t_pdp *header = 0;
+
+ /* check if image data packets are compatible */
+ if ( (header = pdp_packet_header(x->x_packet0))
+ && (PDP_IMAGE == header->type)){
+
+ /* pdp_gradient_process inputs and write into active inlet */
+ switch(pdp_packet_header(x->x_packet0)->info.image.encoding){
+
+ case PDP_IMAGE_YV12:
+ pdp_gradient_process_yv12(x);
+ break;
+
+ case PDP_IMAGE_GREY:
+ pdp_gradient_process_grey(x);
+ break;
+
+ default:
+ /* don't know the type, so dont pdp_gradient_process */
+
+ break;
+ }
+ }
+}
+
+static void pdp_gradient_sendpacket(t_pdp_gradient *x)
+{
+ /* unregister and propagate if valid packet */
+ pdp_pass_if_valid(x->x_outlet0, &x->x_packet0);
+}
+
+static void pdp_gradient_input_0(t_pdp_gradient *x, t_symbol *s, t_floatarg f)
+{
+
+ int p = (int)f;
+
+ if (s== gensym("register_rw")) x->x_dropped = pdp_packet_copy_rw_or_drop(&x->x_packet0, p);
+
+
+ if ((s == gensym("process")) && (-1 != x->x_packet0) && (!x->x_dropped)){
+
+
+ /* add the process method and callback to the process queue */
+
+ pdp_queue_add(x, pdp_gradient_process, pdp_gradient_sendpacket, &x->x_queue_id);
+ }
+
+}
+
+
+
+static void pdp_gradient_free(t_pdp_gradient *x)
+{
+ pdp_queue_finish(x->x_queue_id);
+ pdp_packet_mark_unused(x->x_packet0);
+
+}
+
+t_class *pdp_gradient_class;
+
+
+
+void *pdp_gradient_new(void)
+{
+ int i;
+
+ t_pdp_gradient *x = (t_pdp_gradient *)pd_new(pdp_gradient_class);
+
+ x->x_outlet0 = outlet_new(&x->x_obj, &s_anything);
+
+ x->x_packet0 = -1;
+ x->x_queue_id = -1;
+
+ for (i=-256; i<256; i++){
+ x->x_palette[i&511].y = i << 7;
+ x->x_palette[i&511].u = (-i) << 6;
+ x->x_palette[i&511].v = (i) << 5;
+ }
+ return (void *)x;
+}
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+
+void pdp_gradient_setup(void)
+{
+
+
+ pdp_gradient_class = class_new(gensym("pdp_gradient"), (t_newmethod)pdp_gradient_new,
+ (t_method)pdp_gradient_free, sizeof(t_pdp_gradient), 0, A_NULL);
+
+
+ class_addmethod(pdp_gradient_class, (t_method)pdp_gradient_input_0, gensym("pdp"), A_SYMBOL, A_DEFFLOAT, A_NULL);
+
+ class_addmethod(pdp_gradient_class, (t_method)pdp_gradient_yuv, gensym("yuv"), A_FLOAT, A_FLOAT, A_FLOAT, A_NULL);
+ class_addmethod(pdp_gradient_class, (t_method)pdp_gradient_rgb, gensym("rgb"), A_FLOAT, A_FLOAT, A_FLOAT, A_NULL);
+ // class_addmethod(pdp_gradient_class, (t_method)pdp_gradient_hsv, gensym("hsv"), A_FLOAT, A_FLOAT, A_FLOAT, A_NULL);
+
+}
+
+#ifdef __cplusplus
+}
+#endif
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