git.sesse.net Git - vlc/blob - modules/video_filter/psychedelic.c

   1 /*****************************************************************************
   2  * Psychedelic.c : Psychedelic video effect plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000-2006 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Antoine Cellerier <dionoea -at- videolan -dot- org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <stdlib.h>                                      /* malloc(), free() */
  29 #include <string.h>
  30
  31 #include <math.h>                                            /* sin(), cos() */
  32
  33 #include <vlc/vlc.h>
  34
  35 #include "vlc_filter.h"
  36 #include "vlc_image.h"
  37
  38 /*****************************************************************************
  39  * Local prototypes
  40  *****************************************************************************/
  41 static int  Create    ( vlc_object_t * );
  42 static void Destroy   ( vlc_object_t * );
  43
  44 static picture_t *Filter( filter_t *, picture_t * );
  45
  46 /*****************************************************************************
  47  * Module descriptor
  48  *****************************************************************************/
  49 vlc_module_begin();
  50     set_description( _("Psychedelic video filter") );
  51     set_shortname( _( "Psychedelic" ));
  52     set_capability( "video filter2", 0 );
  53     set_category( CAT_VIDEO );
  54     set_subcategory( SUBCAT_VIDEO_VFILTER );
  55
  56     add_shortcut( "psychedelic" );
  57     set_callbacks( Create, Destroy );
  58 vlc_module_end();
  59
  60 /*****************************************************************************
  61  * vout_sys_t: Distort video output method descriptor
  62  *****************************************************************************
  63  * This structure is part of the video output thread descriptor.
  64  * It describes the Distort specific properties of an output thread.
  65  *****************************************************************************/
  66 struct filter_sys_t
  67 {
  68     image_handler_t *p_image;
  69     unsigned int x, y, scale;
  70     int xinc, yinc, scaleinc;
  71     uint8_t u,v;
  72 };
  73
  74 /*****************************************************************************
  75  * Create: allocates Distort video thread output method
  76  *****************************************************************************
  77  * This function allocates and initializes a Distort vout method.
  78  *****************************************************************************/
  79 static int Create( vlc_object_t *p_this )
  80 {
  81     filter_t *p_filter = (filter_t *)p_this;
  82
  83     /* Allocate structure */
  84     p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
  85     if( p_filter->p_sys == NULL )
  86     {
  87         msg_Err( p_filter, "out of memory" );
  88         return VLC_ENOMEM;
  89     }
  90
  91     p_filter->pf_video_filter = Filter;
  92
  93     p_filter->p_sys->x = 10;
  94     p_filter->p_sys->y = 10;
  95     p_filter->p_sys->scale = 1;
  96     p_filter->p_sys->xinc = 1;
  97     p_filter->p_sys->yinc = 1;
  98     p_filter->p_sys->scaleinc = 1;
  99     p_filter->p_sys->u = 0;
 100     p_filter->p_sys->v = 0;
 101     p_filter->p_sys->p_image = NULL;
 102
 103     return VLC_SUCCESS;
 104 }
 105
 106 /*****************************************************************************
 107  * Destroy: destroy Distort video thread output method
 108  *****************************************************************************
 109  * Terminate an output method created by DistortCreateOutputMethod
 110  *****************************************************************************/
 111 static void Destroy( vlc_object_t *p_this )
 112 {
 113     filter_t *p_filter = (filter_t *)p_this;
 114
 115     if( p_filter->p_sys->p_image )
 116         image_HandlerDelete( p_filter->p_sys->p_image );
 117     p_filter->p_sys->p_image = NULL;
 118
 119     free( p_filter->p_sys );
 120 }
 121
 122 /*****************************************************************************
 123  * Render: displays previously rendered output
 124  *****************************************************************************
 125  * This function send the currently rendered image to Distort image, waits
 126  * until it is displayed and switch the two rendering buffers, preparing next
 127  * frame.
 128  *****************************************************************************/
 129 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
 130 {
 131     picture_t *p_outpic;
 132
 133     unsigned int w, h;
 134     int x,y;
 135     uint8_t u,v;
 136
 137     picture_t *p_converted;
 138     video_format_t fmt_out = {0};
 139     fmt_out.p_palette = NULL;
 140
 141     if( !p_pic ) return NULL;
 142
 143     p_outpic = p_filter->pf_vout_buffer_new( p_filter );
 144     if( !p_outpic )
 145     {
 146         msg_Warn( p_filter, "can't get output picture" );
 147         if( p_pic->pf_release )
 148             p_pic->pf_release( p_pic );
 149         return NULL;
 150     }
 151
 152     if( !p_filter->p_sys->p_image )
 153         p_filter->p_sys->p_image = image_HandlerCreate( p_filter );
 154
 155     /* chrominance */
 156     u = p_filter->p_sys->u;
 157     v = p_filter->p_sys->v;
 158     for( y = 0; y<p_outpic->p[U_PLANE].i_lines; y++)
 159     {
 160         memset( p_outpic->p[U_PLANE].p_pixels+y*p_outpic->p[U_PLANE].i_pitch,
 161                 u, p_outpic->p[U_PLANE].i_pitch );
 162         memset( p_outpic->p[V_PLANE].p_pixels+y*p_outpic->p[V_PLANE].i_pitch,
 163                 v, p_outpic->p[V_PLANE].i_pitch );
 164         if( v == 0 && u != 0 )
 165             u --;
 166         else if( u == 0xff )
 167             v --;
 168         else if( v == 0xff )
 169             u ++;
 170         else if( u == 0 )
 171             v ++;
 172     }
 173
 174     /* luminance */
 175     p_filter->p_libvlc->pf_memcpy(
 176                 p_outpic->p[Y_PLANE].p_pixels, p_pic->p[Y_PLANE].p_pixels,
 177                 p_outpic->p[Y_PLANE].i_lines * p_outpic->p[Y_PLANE].i_pitch );
 178
 179     /* image visualization */
 180     fmt_out = p_filter->fmt_out.video;
 181     fmt_out.i_width = p_filter->fmt_out.video.i_width*p_filter->p_sys->scale/150;
 182     fmt_out.i_height = p_filter->fmt_out.video.i_height*p_filter->p_sys->scale/150;
 183     p_converted = image_Convert( p_filter->p_sys->p_image, p_pic,
 184                                  &(p_pic->format), &fmt_out );
 185
 186 #define copyimage( plane, b ) \
 187     for( y=0; y<p_converted->p[plane].i_visible_lines; y++) { \
 188     for( x=0; x<p_converted->p[plane].i_visible_pitch; x++) { \
 189         int nx, ny; \
 190         if( p_filter->p_sys->yinc == 1 ) \
 191             ny= y; \
 192         else \
 193             ny = p_converted->p[plane].i_visible_lines-y; \
 194         if( p_filter->p_sys->xinc == 1 ) \
 195             nx = x; \
 196         else \
 197             nx = p_converted->p[plane].i_visible_pitch-x; \
 198         p_outpic->p[plane].p_pixels[(p_filter->p_sys->x*b+nx)+(ny+p_filter->p_sys->y*b)*p_outpic->p[plane].i_pitch ] = p_converted->p[plane].p_pixels[y*p_converted->p[plane].i_pitch+x]; \
 199     } }
 200     copyimage( Y_PLANE, 2 );
 201     copyimage( U_PLANE, 1 );
 202     copyimage( V_PLANE, 1 );
 203 #undef copyimage
 204
 205     p_converted->pf_release( p_converted );
 206
 207     p_filter->p_sys->x += p_filter->p_sys->xinc;
 208     p_filter->p_sys->y += p_filter->p_sys->yinc;
 209
 210     p_filter->p_sys->scale += p_filter->p_sys->scaleinc;
 211     if( p_filter->p_sys->scale >= 50 ) p_filter->p_sys->scaleinc = -1;
 212     if( p_filter->p_sys->scale <= 1 ) p_filter->p_sys->scaleinc = 1;
 213
 214     w = p_filter->fmt_out.video.i_width*p_filter->p_sys->scale/150;
 215     h = p_filter->fmt_out.video.i_height*p_filter->p_sys->scale/150;
 216     if( p_filter->p_sys->x*2 + w >= p_filter->fmt_out.video.i_width )
 217         p_filter->p_sys->xinc = -1;
 218     if( p_filter->p_sys->x <= 0 )
 219         p_filter->p_sys->xinc = 1;
 220
 221     if( p_filter->p_sys->x*2 + w >= p_filter->fmt_out.video.i_width )
 222         p_filter->p_sys->x = (p_filter->fmt_out.video.i_width-w)/2;
 223     if( p_filter->p_sys->y*2 + h >= p_filter->fmt_out.video.i_height )
 224         p_filter->p_sys->y = (p_filter->fmt_out.video.i_height-h)/2;
 225
 226     if( p_filter->p_sys->y*2 + h >= p_filter->fmt_out.video.i_height )
 227         p_filter->p_sys->yinc = -1;
 228     if( p_filter->p_sys->y <= 0 )
 229         p_filter->p_sys->yinc = 1;
 230
 231     for( y = 0; y< 16; y++ )
 232     {
 233         if( p_filter->p_sys->v == 0 && p_filter->p_sys->u != 0 )
 234             p_filter->p_sys->u -= 1;
 235         else if( p_filter->p_sys->u == 0xff )
 236             p_filter->p_sys->v -= 1;
 237         else if( p_filter->p_sys->v == 0xff )
 238             p_filter->p_sys->u += 1;
 239         else if( p_filter->p_sys->u == 0 )
 240             p_filter->p_sys->v += 1;
 241     }
 242
 243     p_outpic->date = p_pic->date;
 244     p_outpic->b_force = p_pic->b_force;
 245     p_outpic->i_nb_fields = p_pic->i_nb_fields;
 246     p_outpic->b_progressive = p_pic->b_progressive;
 247     p_outpic->b_top_field_first = p_pic->b_top_field_first;
 248
 249     if( p_pic->pf_release )
 250         p_pic->pf_release( p_pic );
 251
 252     return p_outpic;
 253 }