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