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* Pure Data Packet module.
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* Copyright (c) by Tom Schouten <pdp@zzz.kotnet.org>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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/* this module converts a greyscale image or the luma channel of a colour image
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to a colour image intensity mask, usable for multiplication */
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#include "pdp_resample.h"
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typedef struct pdp_grey2mask_struct
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static void pdp_grey2mask_process_grey(t_pdp_grey2mask *x)
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t_pdp *header = pdp_packet_header(x->x_packet0);
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short int *data = (short int *)pdp_packet_data (x->x_packet0);
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short int *newdata = 0;
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unsigned int w = header->info.image.width;
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unsigned int h = header->info.image.height;
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unsigned int size = w*h;
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unsigned int totalnbpixels = size;
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unsigned int u_offset = size;
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unsigned int v_offset = size + (size>>2);
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unsigned int row, col;
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newpacket = pdp_packet_new_image_YCrCb(w, h);
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newheader = pdp_packet_header(newpacket);
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newdata = (short int *)pdp_packet_data(newpacket);
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/* copy luma channel */
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memcpy(newdata, data, size * sizeof(s16));
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/* subsample luma -> chroma channel */
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pdp_resample_halve(data, newdata+u_offset, w, h);
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/* copy this to the other chroma channel */
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memcpy(newdata+v_offset, newdata+u_offset, (size>>2)*sizeof(s16));
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/* delete source packet and replace with new packet */
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pdp_packet_mark_unused(x->x_packet0);
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x->x_packet0 = newpacket;
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static void pdp_grey2mask_process_yv12(t_pdp_grey2mask *x)
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/* process only the luminance channel */
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pdp_grey2mask_process_grey(x);
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static void pdp_grey2mask_process(t_pdp_grey2mask *x)
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/* check if image data packets are compatible */
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if ( (header = pdp_packet_header(x->x_packet0))
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&& (PDP_IMAGE == header->type)){
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/* pdp_grey2mask_process inputs and write into active inlet */
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switch(pdp_packet_header(x->x_packet0)->info.image.encoding){
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pdp_grey2mask_process_yv12(x);
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pdp_grey2mask_process_grey(x);
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/* don't know the type, so dont pdp_grey2mask_process */
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static void pdp_grey2mask_sendpacket(t_pdp_grey2mask *x)
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/* unregister and propagate if valid packet */
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pdp_packet_pass_if_valid(x->x_outlet0, &x->x_packet0);
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static void pdp_grey2mask_input_0(t_pdp_grey2mask *x, t_symbol *s, t_floatarg f)
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if (s== gensym("register_ro")) x->x_dropped = pdp_packet_copy_ro_or_drop(&x->x_packet0, p);
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if ((s == gensym("process")) && (-1 != x->x_packet0) && (!x->x_dropped)){
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/* add the process method and callback to the process queue */
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//pdp_queue_add(x, pdp_grey2mask_process, pdp_grey2mask_sendpacket, &x->x_queue_id);
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// since the process method creates a packet, this is not processed in the thread
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pdp_grey2mask_process(x);
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pdp_grey2mask_sendpacket(x);
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static void pdp_grey2mask_free(t_pdp_grey2mask *x)
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t_pdp_procqueue *q = pdp_queue_get_queue();
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pdp_procqueue_finish(q, x->x_queue_id);
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pdp_packet_mark_unused(x->x_packet0);
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t_class *pdp_grey2mask_class;
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void *pdp_grey2mask_new(void)
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t_pdp_grey2mask *x = (t_pdp_grey2mask *)pd_new(pdp_grey2mask_class);
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x->x_outlet0 = outlet_new(&x->x_obj, &s_anything);
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void pdp_grey2mask_setup(void)
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pdp_grey2mask_class = class_new(gensym("pdp_grey2mask"), (t_newmethod)pdp_grey2mask_new,
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(t_method)pdp_grey2mask_free, sizeof(t_pdp_grey2mask), 0, A_NULL);
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class_addmethod(pdp_grey2mask_class, (t_method)pdp_grey2mask_input_0, gensym("pdp"), A_SYMBOL, A_DEFFLOAT, A_NULL);
added
removed
modules/image_special/pdp_grey2mask.c
