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