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https://github.com/game-stop/veejay.git
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Initial checkin of veejay 1.4
git-svn-id: svn://code.dyne.org/veejay/trunk@1172 eb8d1916-c9e9-0310-b8de-cf0c9472ead5
This commit is contained in:
Niels Elburg
274
veejay-current/veejay-server/libvje/effects/blob.c
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274
veejay-current/veejay-server/libvje/effects/blob.c
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/*
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* Linux VeeJay
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*
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* Copyright(C)2002 Niels Elburg <nwelburg@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License , or (at your option) any later version.
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*
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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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*
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307 , USA.
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*/
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/* Copyright (C) 2002-2003 W.P. van Paassen - peter@paassen.tmfweb.nl
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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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; see the file COPYING. If not, write to the Free
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Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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blob , originally from the demo effect collection
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easily modified to videoblob
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p0: radius
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p1: number of blobs
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p2: speed
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p3: shape (rect,circle)
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the number of blobs and size of radius determine amount of work for cpu.
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*/
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#include <config.h>
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#include <stdint.h>
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#include <libvjmem/vjmem.h>
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#include "common.h"
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#include "blob.h"
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typedef struct
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{
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short x;
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short y;
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} blob_t;
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#define DEFAULT_RADIUS 16
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#define DEFAULT_NUM 50
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#define BLOB_RECT 0
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#define BLOB_CIRCLE 1
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static blob_t *blobs_;
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static uint8_t **blob_;
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static uint8_t *blob_image_;
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static int blob_ready_ = 0;
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static int blob_radius_ = 16;
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static int blob_dradius_ = 0;
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static int blob_sradius_ = 0;
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static int blob_num_ = 50;
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static int blob_type_ = 1;
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vj_effect *blob_init(int w, int h)
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{
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vj_effect *ve = (vj_effect *) vj_calloc(sizeof(vj_effect));
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ve->num_params = 4;
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ve->defaults = (int *) vj_calloc(sizeof(int) * ve->num_params); /* default values */
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ve->limits[0] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* min */
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ve->limits[1] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* max */
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ve->limits[0][0] = 1;
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ve->limits[1][0] = 360; // radius
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ve->limits[0][1] = 1;
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ve->limits[1][1] = 100; // num blobs
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ve->limits[0][2] = 1;
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ve->limits[1][2] = 100; // speed
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ve->limits[0][3] = 0;
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ve->limits[1][3] = 1; // shape
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ve->defaults[0] = DEFAULT_RADIUS;
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ve->defaults[1] = DEFAULT_NUM;
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ve->defaults[2] = 50;
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ve->defaults[3] = 1;
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ve->description = "Video Blobs";
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ve->sub_format = 1;
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ve->extra_frame = 0;
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ve->has_user =0;
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ve->param_description = vje_build_param_list( ve->num_params, "Radius", "Blobs", "Speed" , "Shape");
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return ve;
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}
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static void blob_init_( blob_t *b , int w , int h)
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{
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b->x = (w >> 1) - blob_radius_;
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b->y = (h >> 1) - blob_radius_;
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}
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// FIXME private
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int blob_malloc(int w, int h)
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{
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int j,i;
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double frac;
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int dist_sqrt;
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if(blob_radius_ <= 0)
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return 0;
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blob_dradius_ = blob_radius_ * 2;
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blob_sradius_ = blob_radius_ * blob_radius_;
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blob_ = (uint8_t**) vj_malloc(sizeof(uint8_t*) * blob_dradius_ );
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for(i = 0; i < blob_dradius_ ; i ++ )
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{
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blob_[i] = (uint8_t*) vj_calloc(sizeof(uint8_t) * blob_dradius_ );
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if(!blob_[i]) return 0;
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}
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blobs_ = (blob_t*) vj_calloc(sizeof(blob_t) * blob_num_ );
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if(!blobs_ ) return 0;
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blob_image_ = (uint8_t*) vj_malloc(sizeof(uint8_t) * w * h );
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if(!blob_image_) return 0;
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for( i = -blob_radius_ ; i < blob_radius_ ; ++ i )
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{
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for( j = -blob_radius_ ; j < blob_radius_ ; ++ j )
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{
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dist_sqrt = i * i + j * j;
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if( dist_sqrt < blob_sradius_ )
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{
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frac = (double) (sqrt(dist_sqrt)) / (double) blob_sradius_;
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blob_[i + blob_radius_][j + blob_radius_] = 0xff;
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}
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else
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{
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blob_[i + blob_radius_][j + blob_radius_ ] = 0x0; // was 0
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}
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}
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}
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for( i = 0; i < blob_num_ ; i ++ )
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{
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blob_init_( blobs_ + i , w , h );
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}
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veejay_memset( blob_image_ , 0 , w * h );
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blob_ready_ = 1;
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return 1;
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}
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void blob_free()
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{
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int i;
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for (i = 0; i < blob_dradius_ ; i ++ )
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if( blob_[i] ) free( blob_[i] );
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if(blobs_)
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free(blobs_);
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if(blob_image_)
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free(blob_image_);
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blobs_ = NULL;
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blob_image_ = NULL;
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}
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typedef void (*blob_func)(int s, int width);
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static void blob_render_circle(int s, int width)
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{
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int i,j;
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for( i = 0; i < blob_dradius_ ; ++ i )
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{
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for( j = 0; j < blob_dradius_ ; ++ j)
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{
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if( blob_image_[ s + j ] + blob_[i][j] > 255 )
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blob_image_[s + j] = 0xff;
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else
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blob_image_[s + j] += blob_[i][j];
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}
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s += width;
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}
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}
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static void blob_render_rect(int s, int width)
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{
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int i,j;
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for( i = 0; i < blob_dradius_ ; ++ i )
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{
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for( j = 0; j < blob_dradius_ ; ++ j)
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{
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blob_image_[s + j] = 0xff;
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}
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s += width;
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}
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}
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static blob_func blob_render(void)
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{
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if( blob_type_ == BLOB_RECT)
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return &blob_render_rect;
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return &blob_render_circle;
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}
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void blob_apply(VJFrame *frame,
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int width, int height, int radius, int num, int speed, int shape)
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{
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const int len = frame->len;
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uint8_t *srcY = frame->data[0];
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uint8_t *srcCb= frame->data[1];
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uint8_t *srcCr= frame->data[2];
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int i,k;
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int s;
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double max = speed / 10.0;
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blob_func f = blob_render();
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blob_type_ = shape;
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if( radius != blob_radius_ || num != blob_num_ )
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{ // reinitialize
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blob_radius_ = radius;
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blob_num_ = num;
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blob_free();
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blob_malloc(width,height);
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}
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// move blob
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for( i = 0; i < blob_num_; i ++)
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{
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blobs_[i].x += -2 + (int) ( max * (rand()/(RAND_MAX+1.0)));
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blobs_[i].y += -2 + (int) ( max * (rand()/(RAND_MAX+1.0)));
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}
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// fill blob
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for( k = 0; k < blob_num_ ; k ++ )
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{
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if( (blobs_[k].x > 0) &&
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(blobs_[k].x < (width - blob_dradius_)) &&
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(blobs_[k].y > 0) &&
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(blobs_[k].y < (height - blob_dradius_)) )
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{
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s = blobs_[k].x + blobs_[k].y * width;
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f(s,width);
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}
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else
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{
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blob_init_( blobs_ + k,width ,height );
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}
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}
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// project blob onto video frame
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for(i = 0; i < len ; i ++ )
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{
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if( blob_image_[i] == 0x0 )
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{
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srcY[i] = 16;
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srcCb[i] = 128;
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srcCr[i] = 128;
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}
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blob_image_[i] = 0x0;
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}
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}
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