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 <string.h>
  29
  30 #include <math.h>                                            /* sin(), cos() */
  31
  32 #include <vlc/vlc.h>
  33
  34 #include "vlc_filter.h"
  35 #include "vlc_image.h"
  36
  37 /*****************************************************************************
  38  * Local prototypes
  39  *****************************************************************************/
  40 static int  Create    ( vlc_object_t * );
  41 static void Destroy   ( vlc_object_t * );
  42
  43 static picture_t *Filter( filter_t *, picture_t * );
  44
  45 /*****************************************************************************
  46  * Module descriptor
  47  *****************************************************************************/
  48 vlc_module_begin();
  49     set_description( _("Psychedelic video filter") );
  50     set_shortname( _( "Psychedelic" ));
  51     set_capability( "video filter2", 0 );
  52     set_category( CAT_VIDEO );
  53     set_subcategory( SUBCAT_VIDEO_VFILTER );
  54
  55     add_shortcut( "psychedelic" );
  56     set_callbacks( Create, Destroy );
  57 vlc_module_end();
  58
  59 /*****************************************************************************
  60  * vout_sys_t: Distort video output method descriptor
  61  *****************************************************************************
  62  * This structure is part of the video output thread descriptor.
  63  * It describes the Distort specific properties of an output thread.
  64  *****************************************************************************/
  65 struct filter_sys_t
  66 {
  67     image_handler_t *p_image;
  68     unsigned int x, y, scale;
  69     int xinc, yinc, scaleinc;
  70     uint8_t u,v;
  71 };
  72
  73 /*****************************************************************************
  74  * Create: allocates Distort video thread output method
  75  *****************************************************************************
  76  * This function allocates and initializes a Distort vout method.
  77  *****************************************************************************/
  78 static int Create( vlc_object_t *p_this )
  79 {
  80     filter_t *p_filter = (filter_t *)p_this;
  81
  82     /* Allocate structure */
  83     p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
  84     if( p_filter->p_sys == NULL )
  85     {
  86         msg_Err( p_filter, "out of memory" );
  87         return VLC_ENOMEM;
  88     }
  89
  90     p_filter->pf_video_filter = Filter;
  91
  92     p_filter->p_sys->x = 10;
  93     p_filter->p_sys->y = 10;
  94     p_filter->p_sys->scale = 1;
  95     p_filter->p_sys->xinc = 1;
  96     p_filter->p_sys->yinc = 1;
  97     p_filter->p_sys->scaleinc = 1;
  98     p_filter->p_sys->u = 0;
  99     p_filter->p_sys->v = 0;
 100     p_filter->p_sys->p_image = NULL;
 101
 102     return VLC_SUCCESS;
 103 }
 104
 105 /*****************************************************************************
 106  * Destroy: destroy Distort video thread output method
 107  *****************************************************************************
 108  * Terminate an output method created by DistortCreateOutputMethod
 109  *****************************************************************************/
 110 static void Destroy( vlc_object_t *p_this )
 111 {
 112     filter_t *p_filter = (filter_t *)p_this;
 113
 114     if( p_filter->p_sys->p_image )
 115         image_HandlerDelete( p_filter->p_sys->p_image );
 116     p_filter->p_sys->p_image = NULL;
 117
 118     free( p_filter->p_sys );
 119 }
 120
 121 /*****************************************************************************
 122  * Render: displays previously rendered output
 123  *****************************************************************************
 124  * This function send the currently rendered image to Distort image, waits
 125  * until it is displayed and switch the two rendering buffers, preparing next
 126  * frame.
 127  *****************************************************************************/
 128 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
 129 {
 130     picture_t *p_outpic;
 131
 132     unsigned int w, h;
 133     int x,y;
 134     uint8_t u,v;
 135
 136     picture_t *p_converted;
 137     video_format_t fmt_out;
 138     memset( &fmt_out, 0, sizeof(video_format_t) );
 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         p_filter->p_libvlc->pf_memset(
 161                 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         p_filter->p_libvlc->pf_memset(
 164                 p_outpic->p[V_PLANE].p_pixels+y*p_outpic->p[V_PLANE].i_pitch,
 165                 v, p_outpic->p[V_PLANE].i_pitch );
 166         if( v == 0 && u != 0 )
 167             u --;
 168         else if( u == 0xff )
 169             v --;
 170         else if( v == 0xff )
 171             u ++;
 172         else if( u == 0 )
 173             v ++;
 174     }
 175
 176     /* luminance */
 177     p_filter->p_libvlc->pf_memcpy(
 178                 p_outpic->p[Y_PLANE].p_pixels, p_pic->p[Y_PLANE].p_pixels,
 179                 p_outpic->p[Y_PLANE].i_lines * p_outpic->p[Y_PLANE].i_pitch );
 180
 181     /* image visualization */
 182     fmt_out = p_filter->fmt_out.video;
 183     fmt_out.i_width = p_filter->fmt_out.video.i_width*p_filter->p_sys->scale/150;
 184     fmt_out.i_height = p_filter->fmt_out.video.i_height*p_filter->p_sys->scale/150;
 185     p_converted = image_Convert( p_filter->p_sys->p_image, p_pic,
 186                                  &(p_pic->format), &fmt_out );
 187
 188 #define copyimage( plane, b ) \
 189     for( y=0; y<p_converted->p[plane].i_visible_lines; y++) { \
 190     for( x=0; x<p_converted->p[plane].i_visible_pitch; x++) { \
 191         int nx, ny; \
 192         if( p_filter->p_sys->yinc == 1 ) \
 193             ny= y; \
 194         else \
 195             ny = p_converted->p[plane].i_visible_lines-y; \
 196         if( p_filter->p_sys->xinc == 1 ) \
 197             nx = x; \
 198         else \
 199             nx = p_converted->p[plane].i_visible_pitch-x; \
 200         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]; \
 201     } }
 202     copyimage( Y_PLANE, 2 );
 203     copyimage( U_PLANE, 1 );
 204     copyimage( V_PLANE, 1 );
 205 #undef copyimage
 206
 207     p_converted->pf_release( p_converted );
 208
 209     p_filter->p_sys->x += p_filter->p_sys->xinc;
 210     p_filter->p_sys->y += p_filter->p_sys->yinc;
 211
 212     p_filter->p_sys->scale += p_filter->p_sys->scaleinc;
 213     if( p_filter->p_sys->scale >= 50 ) p_filter->p_sys->scaleinc = -1;
 214     if( p_filter->p_sys->scale <= 1 ) p_filter->p_sys->scaleinc = 1;
 215
 216     w = p_filter->fmt_out.video.i_width*p_filter->p_sys->scale/150;
 217     h = p_filter->fmt_out.video.i_height*p_filter->p_sys->scale/150;
 218     if( p_filter->p_sys->x*2 + w >= p_filter->fmt_out.video.i_width )
 219         p_filter->p_sys->xinc = -1;
 220     if( p_filter->p_sys->x <= 0 )
 221         p_filter->p_sys->xinc = 1;
 222
 223     if( p_filter->p_sys->x*2 + w >= p_filter->fmt_out.video.i_width )
 224         p_filter->p_sys->x = (p_filter->fmt_out.video.i_width-w)/2;
 225     if( p_filter->p_sys->y*2 + h >= p_filter->fmt_out.video.i_height )
 226         p_filter->p_sys->y = (p_filter->fmt_out.video.i_height-h)/2;
 227
 228     if( p_filter->p_sys->y*2 + h >= p_filter->fmt_out.video.i_height )
 229         p_filter->p_sys->yinc = -1;
 230     if( p_filter->p_sys->y <= 0 )
 231         p_filter->p_sys->yinc = 1;
 232
 233     for( y = 0; y< 16; y++ )
 234     {
 235         if( p_filter->p_sys->v == 0 && p_filter->p_sys->u != 0 )
 236             p_filter->p_sys->u -= 1;
 237         else if( p_filter->p_sys->u == 0xff )
 238             p_filter->p_sys->v -= 1;
 239         else if( p_filter->p_sys->v == 0xff )
 240             p_filter->p_sys->u += 1;
 241         else if( p_filter->p_sys->u == 0 )
 242             p_filter->p_sys->v += 1;
 243     }
 244
 245     p_outpic->date = p_pic->date;
 246     p_outpic->b_force = p_pic->b_force;
 247     p_outpic->i_nb_fields = p_pic->i_nb_fields;
 248     p_outpic->b_progressive = p_pic->b_progressive;
 249     p_outpic->b_top_field_first = p_pic->b_top_field_first;
 250
 251     if( p_pic->pf_release )
 252         p_pic->pf_release( p_pic );
 253
 254     return p_outpic;
 255 }