mirror of
https://github.com/game-stop/veejay.git
synced 2025-12-17 13:20:01 +01:00
273 lines
7.5 KiB
C
273 lines
7.5 KiB
C
/*
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* Linux VeeJay
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*
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* Copyright(C)2005 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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#include "common.h"
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#include <veejaycore/vjmem.h>
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#include "videowall.h"
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typedef struct {
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picture_t **photo_list;
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int num_photos;
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int frame_counter;
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int *offset_table_x;
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int *offset_table_y;
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} videowall_t;
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static inline int gcd(int p, int q ) { if(q==0) return p; else return(gcd(q,p%q)); }
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static void destroy_filmstrip(videowall_t *vw);
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static inline int n_pics(int w, int h)
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{
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return (( w / gcd(w,h)) * 2);
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}
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vj_effect *videowall_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] = 0; // selector
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ve->limits[1][0] = n_pics(w,h);
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ve->limits[0][1] = 0;
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ve->limits[1][1] = w; // displacement x
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ve->limits[0][2] = 0;
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ve->limits[1][2] = h; // displacement y
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ve->limits[0][3] = 0;
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ve->limits[1][3] = 1; // lock update of x,y in offset[selector]
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ve->defaults[0] = 0;
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ve->defaults[1] = 1;
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ve->defaults[2] = 1;
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ve->defaults[3] = 0;
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ve->description = "VideoWall / Tile Placement";
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ve->sub_format = 1;
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ve->extra_frame = 1;
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ve->has_user = 0;
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ve->param_description = vje_build_param_list( ve->num_params, "Photos","X Displacement", "Y displacement", "Lock update");
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return ve;
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}
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static void *prepare_filmstrip(int w, int h)
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{
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int i,j;
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int picture_width = gcd(w,h);
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int picture_height = gcd(w,h);
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int film_length = n_pics(w,h);
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videowall_t *vw = (videowall_t*) vj_calloc(sizeof(videowall_t));
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if(!vw) {
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return NULL;
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}
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vw->photo_list = (picture_t**) vj_calloc(sizeof(picture_t*) * film_length );
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if(!vw->photo_list) {
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destroy_filmstrip(vw);
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return NULL;
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}
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vw->num_photos = film_length;
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uint8_t val = 0;
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int inc = vw->num_photos % 255;
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for ( i = 0; i < vw->num_photos; i ++ )
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{
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vw->photo_list[i] = vj_calloc(sizeof(picture_t));
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if(!vw->photo_list[i]) {
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destroy_filmstrip(vw);
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return NULL;
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}
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vw->photo_list[i]->w = picture_width;
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vw->photo_list[i]->h = picture_height;
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for( j = 0; j < 3; j ++ )
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{
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vw->photo_list[i]->data[j] = vj_malloc(sizeof(uint8_t) * picture_width * picture_height );
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if(!vw->photo_list[i]->data[j]) {
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destroy_filmstrip(vw);
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return NULL;
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}
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}
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veejay_memset( vw->photo_list[i]->data[0], 0,
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picture_width * picture_height );
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veejay_memset( vw->photo_list[i]->data[1],128,
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picture_width * picture_height );
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veejay_memset( vw->photo_list[i]->data[2],128,
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picture_width * picture_height );
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val+= inc;
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}
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vw->frame_counter = 0;
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vw->offset_table_x = (int*) vj_calloc(sizeof(int) * film_length);
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if(!vw->offset_table_x) {
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destroy_filmstrip(vw);
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return NULL;
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}
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vw->offset_table_y = (int*) vj_calloc(sizeof(int) * film_length);
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if(!vw->offset_table_y) {
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destroy_filmstrip(vw);
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return NULL;
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}
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return (void*) vw;
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}
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static void destroy_filmstrip(videowall_t *vw)
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{
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if(vw->photo_list)
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{
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int i = 0;
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while(i < vw->num_photos)
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{
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if( vw->photo_list[i] )
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{
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int j;
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for( j = 0; j < 3; j ++ )
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if(vw->photo_list[i]->data[j])
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free(vw->photo_list[i]->data[j]);
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free(vw->photo_list[i]);
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}
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i++;
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}
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free(vw->photo_list);
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}
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vw->photo_list = NULL;
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vw->num_photos = 0;
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vw->frame_counter = 0;
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if(vw->offset_table_x) free(vw->offset_table_x);
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if(vw->offset_table_y) free(vw->offset_table_y);
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free(vw);
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}
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void *videowall_malloc(int w, int h )
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{
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return prepare_filmstrip(w,h);
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}
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void videowall_free(void *ptr)
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{
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destroy_filmstrip(ptr);
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}
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static void take_photo( videowall_t *vw, uint8_t *plane, uint8_t *dst_plane, int w, int h, int index )
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{
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int x,y,dx,dy;
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int sum;
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int dst_x, dst_y;
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int step_y;
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int step_x;
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int box_width = vw->photo_list[index]->w;
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int box_height = vw->photo_list[index]->h;
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step_x = w / box_width;
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step_y = h / box_height;
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for( y = 0 ,dst_y = 0; y < h && dst_y < box_height; y += step_y )
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{
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for( x = 0, dst_x = 0; x < w && dst_x < box_width; x+= step_x )
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{
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sum = 0;
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for( dy = 0; dy < step_y; dy ++ )
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{
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for( dx = 0; dx < step_x; dx++)
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{
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sum += plane[ ((y+dy)*w+(dx+x)) ];
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}
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}
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// still problem here!
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if(sum > 0)
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dst_plane[(dst_y*box_width)+dst_x] = sum / (step_y*step_x);
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else
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dst_plane[(dst_y*box_width)+dst_x] = pixel_Y_lo_;
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dst_x++;
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}
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dst_y++;
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}
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}
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static void put_photo( videowall_t *vw, uint8_t *dst_plane, uint8_t *photo, int dst_w, int dst_h, int index)
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{
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int n = (vw->num_photos/2);
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int box_w = vw->photo_list[index]->w;
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int box_h = vw->photo_list[index]->h;
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int x,y;
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// blits photos left -> right , < n ? :top : bottom
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int dy = vw->offset_table_y[index];
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int dx = vw->offset_table_x[index];
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uint8_t *P = (index < n ? dst_plane + ( dy * dst_w ) : dst_plane + ((abs(dst_h-box_h-dy)%dst_h)*dst_w));
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int offset = (box_w * index + dx) % dst_w;
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for( y = 0 ; y < box_h ; y ++ )
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{
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for( x = 0; x < box_w; x ++ )
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{
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*(P + offset + x ) = photo[(y*box_h)+x];
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}
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P += dst_w;
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}
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}
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void videowall_apply( void *ptr, VJFrame *frameA, VJFrame *frameB, int *args )
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{
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unsigned int i;
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const unsigned int width = frameA->width;
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const unsigned int height = frameA->height;
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uint8_t *dstY = frameA->data[0];
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uint8_t *dstU = frameA->data[1];
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uint8_t *dstV = frameA->data[2];
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videowall_t *vw = (videowall_t*) ptr;
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int a = args[0];
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int b = args[1];
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int c = args[2];
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int d = args[3];
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if(d==0)
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{
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vw->offset_table_x[a] = b;
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vw->offset_table_y[a] = c;
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}
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for( i = 0; i < 3; i ++ )
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{
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take_photo( vw, frameA->data[i], vw->photo_list[(vw->frame_counter%vw->num_photos)]->data[i], width, height , vw->frame_counter % vw->num_photos);
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}
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vw->frame_counter++;
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for( i = 0; i < 3; i ++ )
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{
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take_photo( vw, frameB->data[i], vw->photo_list[(vw->frame_counter%vw->num_photos)]->data[i], width, height , vw->frame_counter % vw->num_photos);
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}
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for ( i = 0; i < vw->num_photos; i ++ )
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{
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put_photo( vw, dstY, vw->photo_list[i]->data[0],width,height,i);
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put_photo( vw, dstU, vw->photo_list[i]->data[1],width,height,i);
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put_photo( vw, dstV, vw->photo_list[i]->data[2],width,height,i);
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}
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vw->frame_counter++;
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}
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