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
  29 #include <math.h>                                            /* sin(), cos() */
  30
  31 #ifdef HAVE_CONFIG_H
  32 # include "config.h"
  33 #endif
  34
  35 #include <vlc/vlc.h>
  36 #include <vlc_plugin.h>
  37
  38 #include "vlc_filter.h"
  39 #include "vlc_image.h"
  40
  41 /*****************************************************************************
  42  * Local prototypes
  43  *****************************************************************************/
  44 static int  Create    ( vlc_object_t * );
  45 static void Destroy   ( vlc_object_t * );
  46
  47 static picture_t *Filter( filter_t *, picture_t * );
  48
  49 /*****************************************************************************
  50  * Module descriptor
  51  *****************************************************************************/
  52 vlc_module_begin();
  53     set_description( _("Psychedelic video filter") );
  54     set_shortname( _( "Psychedelic" ));
  55     set_capability( "video filter2", 0 );
  56     set_category( CAT_VIDEO );
  57     set_subcategory( SUBCAT_VIDEO_VFILTER );
  58
  59     add_shortcut( "psychedelic" );
  60     set_callbacks( Create, Destroy );
  61 vlc_module_end();
  62
  63 /*****************************************************************************
  64  * vout_sys_t: Distort video output method descriptor
  65  *****************************************************************************
  66  * This structure is part of the video output thread descriptor.
  67  * It describes the Distort specific properties of an output thread.
  68  *****************************************************************************/
  69 struct filter_sys_t
  70 {
  71     image_handler_t *p_image;
  72     unsigned int x, y, scale;
  73     int xinc, yinc, scaleinc;
  74     uint8_t u,v;
  75 };
  76
  77 /*****************************************************************************
  78  * Create: allocates Distort video thread output method
  79  *****************************************************************************
  80  * This function allocates and initializes a Distort vout method.
  81  *****************************************************************************/
  82 static int Create( vlc_object_t *p_this )
  83 {
  84     filter_t *p_filter = (filter_t *)p_this;
  85
  86     /* Allocate structure */
  87     p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
  88     if( p_filter->p_sys == NULL )
  89     {
  90         msg_Err( p_filter, "out of memory" );
  91         return VLC_ENOMEM;
  92     }
  93
  94     p_filter->pf_video_filter = Filter;
  95
  96     p_filter->p_sys->x = 10;
  97     p_filter->p_sys->y = 10;
  98     p_filter->p_sys->scale = 1;
  99     p_filter->p_sys->xinc = 1;
 100     p_filter->p_sys->yinc = 1;
 101     p_filter->p_sys->scaleinc = 1;
 102     p_filter->p_sys->u = 0;
 103     p_filter->p_sys->v = 0;
 104     p_filter->p_sys->p_image = NULL;
 105
 106     return VLC_SUCCESS;
 107 }
 108
 109 /*****************************************************************************
 110  * Destroy: destroy Distort video thread output method
 111  *****************************************************************************
 112  * Terminate an output method created by DistortCreateOutputMethod
 113  *****************************************************************************/
 114 static void Destroy( vlc_object_t *p_this )
 115 {
 116     filter_t *p_filter = (filter_t *)p_this;
 117
 118     if( p_filter->p_sys->p_image )
 119         image_HandlerDelete( p_filter->p_sys->p_image );
 120     p_filter->p_sys->p_image = NULL;
 121
 122     free( p_filter->p_sys );
 123 }
 124
 125 /*****************************************************************************
 126  * Render: displays previously rendered output
 127  *****************************************************************************
 128  * This function send the currently rendered image to Distort image, waits
 129  * until it is displayed and switch the two rendering buffers, preparing next
 130  * frame.
 131  *****************************************************************************/
 132 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
 133 {
 134     picture_t *p_outpic;
 135
 136     unsigned int w, h;
 137     int x,y;
 138     uint8_t u,v;
 139
 140     picture_t *p_converted;
 141     video_format_t fmt_out;
 142     memset( &fmt_out, 0, sizeof(video_format_t) );
 143     fmt_out.p_palette = NULL;
 144
 145     if( !p_pic ) return NULL;
 146
 147     p_outpic = p_filter->pf_vout_buffer_new( p_filter );
 148     if( !p_outpic )
 149     {
 150         msg_Warn( p_filter, "can't get output picture" );
 151         if( p_pic->pf_release )
 152             p_pic->pf_release( p_pic );
 153         return NULL;
 154     }
 155
 156     if( !p_filter->p_sys->p_image )
 157         p_filter->p_sys->p_image = image_HandlerCreate( p_filter );
 158
 159     /* chrominance */
 160     u = p_filter->p_sys->u;
 161     v = p_filter->p_sys->v;
 162     for( y = 0; y<p_outpic->p[U_PLANE].i_lines; y++)
 163     {
 164         vlc_memset(
 165                 p_outpic->p[U_PLANE].p_pixels+y*p_outpic->p[U_PLANE].i_pitch,
 166                 u, p_outpic->p[U_PLANE].i_pitch );
 167         vlc_memset(
 168                 p_outpic->p[V_PLANE].p_pixels+y*p_outpic->p[V_PLANE].i_pitch,
 169                 v, p_outpic->p[V_PLANE].i_pitch );
 170         if( v == 0 && u != 0 )
 171             u --;
 172         else if( u == 0xff )
 173             v --;
 174         else if( v == 0xff )
 175             u ++;
 176         else if( u == 0 )
 177             v ++;
 178     }
 179
 180     /* luminance */
 181     vlc_memcpy( p_outpic->p[Y_PLANE].p_pixels, p_pic->p[Y_PLANE].p_pixels,
 182                 p_outpic->p[Y_PLANE].i_lines * p_outpic->p[Y_PLANE].i_pitch );
 183
 184     /* image visualization */
 185     fmt_out = p_filter->fmt_out.video;
 186     fmt_out.i_width = p_filter->fmt_out.video.i_width*p_filter->p_sys->scale/150;
 187     fmt_out.i_height = p_filter->fmt_out.video.i_height*p_filter->p_sys->scale/150;
 188     p_converted = image_Convert( p_filter->p_sys->p_image, p_pic,
 189                                  &(p_pic->format), &fmt_out );
 190
 191     if( p_converted )
 192     {
 193 #define copyimage( plane, b ) \
 194     for( y=0; y<p_converted->p[plane].i_visible_lines; y++) { \
 195     for( x=0; x<p_converted->p[plane].i_visible_pitch; x++) { \
 196         int nx, ny; \
 197         if( p_filter->p_sys->yinc == 1 ) \
 198             ny= y; \
 199         else \
 200             ny = p_converted->p[plane].i_visible_lines-y; \
 201         if( p_filter->p_sys->xinc == 1 ) \
 202             nx = x; \
 203         else \
 204             nx = p_converted->p[plane].i_visible_pitch-x; \
 205         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]; \
 206     } }
 207     copyimage( Y_PLANE, 2 );
 208     copyimage( U_PLANE, 1 );
 209     copyimage( V_PLANE, 1 );
 210 #undef copyimage
 211
 212     p_converted->pf_release( p_converted );
 213     }
 214     else
 215     {
 216         msg_Err( p_filter, "Image scaling failed miserably." );
 217     }
 218
 219     p_filter->p_sys->x += p_filter->p_sys->xinc;
 220     p_filter->p_sys->y += p_filter->p_sys->yinc;
 221
 222     p_filter->p_sys->scale += p_filter->p_sys->scaleinc;
 223     if( p_filter->p_sys->scale >= 50 ) p_filter->p_sys->scaleinc = -1;
 224     if( p_filter->p_sys->scale <= 1 ) p_filter->p_sys->scaleinc = 1;
 225
 226     w = p_filter->fmt_out.video.i_width*p_filter->p_sys->scale/150;
 227     h = p_filter->fmt_out.video.i_height*p_filter->p_sys->scale/150;
 228     if( p_filter->p_sys->x*2 + w >= p_filter->fmt_out.video.i_width )
 229         p_filter->p_sys->xinc = -1;
 230     if( p_filter->p_sys->x <= 0 )
 231         p_filter->p_sys->xinc = 1;
 232
 233     if( p_filter->p_sys->x*2 + w >= p_filter->fmt_out.video.i_width )
 234         p_filter->p_sys->x = (p_filter->fmt_out.video.i_width-w)/2;
 235     if( p_filter->p_sys->y*2 + h >= p_filter->fmt_out.video.i_height )
 236         p_filter->p_sys->y = (p_filter->fmt_out.video.i_height-h)/2;
 237
 238     if( p_filter->p_sys->y*2 + h >= p_filter->fmt_out.video.i_height )
 239         p_filter->p_sys->yinc = -1;
 240     if( p_filter->p_sys->y <= 0 )
 241         p_filter->p_sys->yinc = 1;
 242
 243     for( y = 0; y< 16; y++ )
 244     {
 245         if( p_filter->p_sys->v == 0 && p_filter->p_sys->u != 0 )
 246             p_filter->p_sys->u -= 1;
 247         else if( p_filter->p_sys->u == 0xff )
 248             p_filter->p_sys->v -= 1;
 249         else if( p_filter->p_sys->v == 0xff )
 250             p_filter->p_sys->u += 1;
 251         else if( p_filter->p_sys->u == 0 )
 252             p_filter->p_sys->v += 1;
 253     }
 254
 255     p_outpic->date = p_pic->date;
 256     p_outpic->b_force = p_pic->b_force;
 257     p_outpic->i_nb_fields = p_pic->i_nb_fields;
 258     p_outpic->b_progressive = p_pic->b_progressive;
 259     p_outpic->b_top_field_first = p_pic->b_top_field_first;
 260
 261     if( p_pic->pf_release )
 262         p_pic->pf_release( p_pic );
 263
 264     return p_outpic;
 265 }