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