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
  37 #include "vlc_filter.h"
  38 #include "vlc_image.h"
  39
  40 /*****************************************************************************
  41  * Local prototypes
  42  *****************************************************************************/
  43 static int  Create    ( vlc_object_t * );
  44 static void Destroy   ( vlc_object_t * );
  45
  46 static picture_t *Filter( filter_t *, picture_t * );
  47
  48 /*****************************************************************************
  49  * Module descriptor
  50  *****************************************************************************/
  51 vlc_module_begin();
  52     set_description( _("Psychedelic video filter") );
  53     set_shortname( _( "Psychedelic" ));
  54     set_capability( "video filter2", 0 );
  55     set_category( CAT_VIDEO );
  56     set_subcategory( SUBCAT_VIDEO_VFILTER );
  57
  58     add_shortcut( "psychedelic" );
  59     set_callbacks( Create, Destroy );
  60 vlc_module_end();
  61
  62 /*****************************************************************************
  63  * vout_sys_t: Distort video output method descriptor
  64  *****************************************************************************
  65  * This structure is part of the video output thread descriptor.
  66  * It describes the Distort specific properties of an output thread.
  67  *****************************************************************************/
  68 struct filter_sys_t
  69 {
  70     image_handler_t *p_image;
  71     unsigned int x, y, scale;
  72     int xinc, yinc, scaleinc;
  73     uint8_t u,v;
  74 };
  75
  76 /*****************************************************************************
  77  * Create: allocates Distort video thread output method
  78  *****************************************************************************
  79  * This function allocates and initializes a Distort vout method.
  80  *****************************************************************************/
  81 static int Create( vlc_object_t *p_this )
  82 {
  83     filter_t *p_filter = (filter_t *)p_this;
  84
  85     /* Allocate structure */
  86     p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
  87     if( p_filter->p_sys == NULL )
  88     {
  89         msg_Err( p_filter, "out of memory" );
  90         return VLC_ENOMEM;
  91     }
  92
  93     p_filter->pf_video_filter = Filter;
  94
  95     p_filter->p_sys->x = 10;
  96     p_filter->p_sys->y = 10;
  97     p_filter->p_sys->scale = 1;
  98     p_filter->p_sys->xinc = 1;
  99     p_filter->p_sys->yinc = 1;
 100     p_filter->p_sys->scaleinc = 1;
 101     p_filter->p_sys->u = 0;
 102     p_filter->p_sys->v = 0;
 103     p_filter->p_sys->p_image = NULL;
 104
 105     return VLC_SUCCESS;
 106 }
 107
 108 /*****************************************************************************
 109  * Destroy: destroy Distort video thread output method
 110  *****************************************************************************
 111  * Terminate an output method created by DistortCreateOutputMethod
 112  *****************************************************************************/
 113 static void Destroy( vlc_object_t *p_this )
 114 {
 115     filter_t *p_filter = (filter_t *)p_this;
 116
 117     if( p_filter->p_sys->p_image )
 118         image_HandlerDelete( p_filter->p_sys->p_image );
 119     p_filter->p_sys->p_image = NULL;
 120
 121     free( p_filter->p_sys );
 122 }
 123
 124 /*****************************************************************************
 125  * Render: displays previously rendered output
 126  *****************************************************************************
 127  * This function send the currently rendered image to Distort image, waits
 128  * until it is displayed and switch the two rendering buffers, preparing next
 129  * frame.
 130  *****************************************************************************/
 131 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
 132 {
 133     picture_t *p_outpic;
 134
 135     unsigned int w, h;
 136     int x,y;
 137     uint8_t u,v;
 138
 139     picture_t *p_converted;
 140     video_format_t fmt_out;
 141     memset( &fmt_out, 0, sizeof(video_format_t) );
 142     fmt_out.p_palette = NULL;
 143
 144     if( !p_pic ) return NULL;
 145
 146     p_outpic = p_filter->pf_vout_buffer_new( p_filter );
 147     if( !p_outpic )
 148     {
 149         msg_Warn( p_filter, "can't get output picture" );
 150         if( p_pic->pf_release )
 151             p_pic->pf_release( p_pic );
 152         return NULL;
 153     }
 154
 155     if( !p_filter->p_sys->p_image )
 156         p_filter->p_sys->p_image = image_HandlerCreate( p_filter );
 157
 158     /* chrominance */
 159     u = p_filter->p_sys->u;
 160     v = p_filter->p_sys->v;
 161     for( y = 0; y<p_outpic->p[U_PLANE].i_lines; y++)
 162     {
 163         p_filter->p_libvlc->pf_memset(
 164                 p_outpic->p[U_PLANE].p_pixels+y*p_outpic->p[U_PLANE].i_pitch,
 165                 u, p_outpic->p[U_PLANE].i_pitch );
 166         p_filter->p_libvlc->pf_memset(
 167                 p_outpic->p[V_PLANE].p_pixels+y*p_outpic->p[V_PLANE].i_pitch,
 168                 v, p_outpic->p[V_PLANE].i_pitch );
 169         if( v == 0 && u != 0 )
 170             u --;
 171         else if( u == 0xff )
 172             v --;
 173         else if( v == 0xff )
 174             u ++;
 175         else if( u == 0 )
 176             v ++;
 177     }
 178
 179     /* luminance */
 180     p_filter->p_libvlc->pf_memcpy(
 181                 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 }