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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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#include "pdp_resample.h"
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typedef struct pdp_scale_struct
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unsigned int x_height;
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static void pdp_scale_process_yv12(t_pdp_scale *x)
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t_pdp *header0 = pdp_packet_header(x->x_packet0);
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t_pdp *header1 = pdp_packet_header(x->x_packet1);
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void *data0 = pdp_packet_data (x->x_packet0);
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void *data1 = pdp_packet_data (x->x_packet1);
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unsigned int src_w = header0->info.image.width;
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unsigned int src_h = header0->info.image.height;
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unsigned int dst_w = header1->info.image.width;
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unsigned int dst_h = header1->info.image.height;
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short int *src_image = (short int *)data0;
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short int *dst_image = (short int *)data1;
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unsigned int src_size = src_w*src_h;
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unsigned int src_voffset = src_size;
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unsigned int src_uoffset = src_size + (src_size>>2);
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unsigned int dst_size = dst_w*dst_h;
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unsigned int dst_voffset = dst_size;
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unsigned int dst_uoffset = dst_size + (dst_size>>2);
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pdp_resample_scale_bilin(src_image, dst_image, src_w, src_h, dst_w, dst_h);
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pdp_resample_scale_bilin(src_image+src_voffset, dst_image+dst_voffset, src_w>>1, src_h>>1, dst_w>>1, dst_h>>1);
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pdp_resample_scale_bilin(src_image+src_uoffset, dst_image+dst_uoffset, src_w>>1, src_h>>1, dst_w>>1, dst_h>>1);
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pdp_resample_scale_nn(src_image, dst_image, src_w, src_h, dst_w, dst_h);
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pdp_resample_scale_nn(src_image+src_voffset, dst_image+dst_voffset, src_w>>1, src_h>>1, dst_w>>1, dst_h>>1);
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pdp_resample_scale_nn(src_image+src_uoffset, dst_image+dst_uoffset, src_w>>1, src_h>>1, dst_w>>1, dst_h>>1);
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static void pdp_scale_process_grey(t_pdp_scale *x)
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t_pdp *header0 = pdp_packet_header(x->x_packet0);
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t_pdp *header1 = pdp_packet_header(x->x_packet1);
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void *data0 = pdp_packet_data (x->x_packet0);
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void *data1 = pdp_packet_data (x->x_packet1);
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unsigned int src_w = header0->info.image.width;
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unsigned int src_h = header0->info.image.height;
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unsigned int dst_w = header1->info.image.width;
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unsigned int dst_h = header1->info.image.height;
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short int *src_image = (short int *)data0;
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short int *dst_image = (short int *)data1;
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if (x->x_quality) pdp_resample_scale_bilin(src_image, dst_image, src_w, src_h, dst_w, dst_h);
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else pdp_resample_scale_nn(src_image, dst_image, src_w, src_h, dst_w, dst_h);
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static void pdp_scale_sendpacket(t_pdp_scale *x)
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/* delete source packet */
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pdp_packet_mark_unused(x->x_packet0);
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/* unregister and propagate if valid dest packet */
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pdp_packet_pass_if_valid(x->x_outlet0, &x->x_packet1);
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static void pdp_scale_process(t_pdp_scale *x)
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t_pdp_procqueue *q = pdp_queue_get_queue();
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t_pdp *header0 = pdp_packet_header(x->x_packet0);
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/* check data packets */
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if ((header0) && (PDP_IMAGE == header0->type)){
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/* if dims are equal, just send the packet */
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if ((header0->info.image.width == x->x_width)
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&& (header0->info.image.height == x->x_height)){
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x->x_packet1 = x->x_packet0;
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pdp_scale_sendpacket(x);
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switch(header0->info.image.encoding){
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x->x_packet1 = pdp_packet_new_image_YCrCb(x->x_width, x->x_height);
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if(x->x_packet1 == -1){
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post("pdp_scale: can't allocate packet");
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pdp_procqueue_add(q, x, pdp_scale_process_yv12, pdp_scale_sendpacket, &x->x_queue_id);
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x->x_packet1 = pdp_packet_new_image_grey(x->x_width, x->x_height);
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if(x->x_packet1 == -1){
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post("pdp_scale: can't allocate packet");
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pdp_procqueue_add(q, x, pdp_scale_process_grey, pdp_scale_sendpacket, &x->x_queue_id);
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/* don't know the type, so dont process */
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static void pdp_scale_input_0(t_pdp_scale *x, t_symbol *s, t_floatarg f)
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if (s== gensym("register_rw")) 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_scale_process(x);
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static void pdp_scale_width(t_pdp_scale *x, t_floatarg f)
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static void pdp_scale_height(t_pdp_scale *x, t_floatarg f)
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static void pdp_scale_dim(t_pdp_scale *x, t_floatarg w, t_floatarg h)
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pdp_scale_width(x, w);
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pdp_scale_height(x, h);
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static void pdp_scale_quality(t_pdp_scale *x, t_floatarg f)
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if (f==0) x->x_quality = 0;
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if (f==1) x->x_quality = 1;
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t_class *pdp_scale_class;
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void pdp_scale_free(t_pdp_scale *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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pdp_packet_mark_unused(x->x_packet1);
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void *pdp_scale_new(t_floatarg fw, t_floatarg fh)
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t_pdp_scale *x = (t_pdp_scale *)pd_new(pdp_scale_class);
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x->x_outlet0 = outlet_new(&x->x_obj, &s_anything);
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if ((fw != 0.0f) && (fh != 0.0f)) pdp_scale_dim(x, fw, fh);
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else pdp_scale_dim(x, 320, 240);
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pdp_scale_quality(x, 1);
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void pdp_scale_setup(void)
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pdp_scale_class = class_new(gensym("pdp_scale"), (t_newmethod)pdp_scale_new,
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(t_method)pdp_scale_free, sizeof(t_pdp_scale), 0, A_DEFFLOAT, A_DEFFLOAT, A_NULL);
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class_addmethod(pdp_scale_class, (t_method)pdp_scale_quality, gensym("quality"), A_FLOAT, A_NULL);
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class_addmethod(pdp_scale_class, (t_method)pdp_scale_width, gensym("width"), A_FLOAT, A_NULL);
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class_addmethod(pdp_scale_class, (t_method)pdp_scale_height, gensym("height"), A_FLOAT, A_NULL);
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class_addmethod(pdp_scale_class, (t_method)pdp_scale_dim, gensym("dim"), A_FLOAT, A_FLOAT, A_NULL);
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class_addmethod(pdp_scale_class, (t_method)pdp_scale_input_0, gensym("pdp"), A_SYMBOL, A_DEFFLOAT, A_NULL);