git.sesse.net Git - vlc/blob - modules/video_filter/invert.c

   1 /*****************************************************************************
   2  * invert.c : Invert video plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001, 2002, 2003 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>                                      /* malloc(), free() */
  28 #include <string.h>
  29
  30 #include <vlc/vlc.h>
  31 #include <vlc/vout.h>
  32
  33 #include "filter_common.h"
  34
  35 /*****************************************************************************
  36  * Local prototypes
  37  *****************************************************************************/
  38 static int  Create    ( vlc_object_t * );
  39 static void Destroy   ( vlc_object_t * );
  40
  41 static int  Init      ( vout_thread_t * );
  42 static void End       ( vout_thread_t * );
  43 static void Render    ( vout_thread_t *, picture_t * );
  44
  45 static int  SendEvents( vlc_object_t *, char const *,
  46                         vlc_value_t, vlc_value_t, void * );
  47
  48 /*****************************************************************************
  49  * Module descriptor
  50  *****************************************************************************/
  51 vlc_module_begin();
  52     set_description( _("Invert video filter") );
  53     set_shortname( N_("Color inversion" ));
  54     set_category( CAT_VIDEO );
  55     set_subcategory( SUBCAT_VIDEO_VFILTER );
  56     set_capability( "video filter", 0 );
  57     add_shortcut( "invert" );
  58     set_callbacks( Create, Destroy );
  59 vlc_module_end();
  60
  61 /*****************************************************************************
  62  * vout_sys_t: Invert video output method descriptor
  63  *****************************************************************************
  64  * This structure is part of the video output thread descriptor.
  65  * It describes the Invert specific properties of an output thread.
  66  *****************************************************************************/
  67 struct vout_sys_t
  68 {
  69     vout_thread_t *p_vout;
  70 };
  71
  72 /*****************************************************************************
  73  * Control: control facility for the vout (forwards to child vout)
  74  *****************************************************************************/
  75 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
  76 {
  77     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
  78 }
  79
  80 /*****************************************************************************
  81  * Create: allocates Invert video thread output method
  82  *****************************************************************************
  83  * This function allocates and initializes a Invert vout method.
  84  *****************************************************************************/
  85 static int Create( vlc_object_t *p_this )
  86 {
  87     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  88
  89     /* Allocate structure */
  90     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  91     if( p_vout->p_sys == NULL )
  92     {
  93         msg_Err( p_vout, "out of memory" );
  94         return VLC_ENOMEM;
  95     }
  96
  97     p_vout->pf_init = Init;
  98     p_vout->pf_end = End;
  99     p_vout->pf_manage = NULL;
 100     p_vout->pf_render = Render;
 101     p_vout->pf_display = NULL;
 102     p_vout->pf_control = Control;
 103
 104     return VLC_SUCCESS;
 105 }
 106
 107 /*****************************************************************************
 108  * Init: initialize Invert video thread output method
 109  *****************************************************************************/
 110 static int Init( vout_thread_t *p_vout )
 111 {
 112     int i_index;
 113     picture_t *p_pic;
 114
 115     I_OUTPUTPICTURES = 0;
 116
 117     /* Initialize the output structure */
 118     p_vout->output.i_chroma = p_vout->render.i_chroma;
 119     p_vout->output.i_width  = p_vout->render.i_width;
 120     p_vout->output.i_height = p_vout->render.i_height;
 121     p_vout->output.i_aspect = p_vout->render.i_aspect;
 122
 123     /* Try to open the real video output */
 124     msg_Dbg( p_vout, "spawning the real video output" );
 125
 126     p_vout->p_sys->p_vout = vout_Create( p_vout,
 127                            p_vout->render.i_width, p_vout->render.i_height,
 128                            p_vout->render.i_chroma, p_vout->render.i_aspect );
 129
 130     /* Everything failed */
 131     if( p_vout->p_sys->p_vout == NULL )
 132     {
 133         msg_Err( p_vout, "can't open vout, aborting" );
 134
 135         return VLC_EGENERIC;
 136     }
 137
 138     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 139
 140     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 141
 142     ADD_PARENT_CALLBACKS( SendEventsToChild );
 143
 144     return VLC_SUCCESS;
 145 }
 146
 147 /*****************************************************************************
 148  * End: terminate Invert video thread output method
 149  *****************************************************************************/
 150 static void End( vout_thread_t *p_vout )
 151 {
 152     int i_index;
 153
 154     /* Free the fake output buffers we allocated */
 155     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 156     {
 157         i_index--;
 158         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 159     }
 160 }
 161
 162 /*****************************************************************************
 163  * Destroy: destroy Invert video thread output method
 164  *****************************************************************************
 165  * Terminate an output method created by InvertCreateOutputMethod
 166  *****************************************************************************/
 167 static void Destroy( vlc_object_t *p_this )
 168 {
 169     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 170
 171     if( p_vout->p_sys->p_vout )
 172     {
 173         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 174         vlc_object_detach( p_vout->p_sys->p_vout );
 175         vout_Destroy( p_vout->p_sys->p_vout );
 176     }
 177
 178     DEL_PARENT_CALLBACKS( SendEventsToChild );
 179
 180     free( p_vout->p_sys );
 181 }
 182
 183 /*****************************************************************************
 184  * Render: displays previously rendered output
 185  *****************************************************************************
 186  * This function send the currently rendered image to Invert image, waits
 187  * until it is displayed and switch the two rendering buffers, preparing next
 188  * frame.
 189  *****************************************************************************/
 190 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 191 {
 192     picture_t *p_outpic;
 193     int i_index;
 194
 195     /* This is a new frame. Get a structure from the video_output. */
 196     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 197               == NULL )
 198     {
 199         if( p_vout->b_die || p_vout->b_error )
 200         {
 201             return;
 202         }
 203         msleep( VOUT_OUTMEM_SLEEP );
 204     }
 205
 206     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 207     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 208
 209     for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 210     {
 211         uint8_t *p_in, *p_in_end, *p_line_end, *p_out;
 212
 213         p_in = p_pic->p[i_index].p_pixels;
 214         p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 215                            * p_pic->p[i_index].i_pitch;
 216
 217         p_out = p_outpic->p[i_index].p_pixels;
 218
 219         for( ; p_in < p_in_end ; )
 220         {
 221             uint64_t *p_in64, *p_out64;
 222
 223             p_line_end = p_in + p_pic->p[i_index].i_visible_pitch - 64;
 224
 225             p_in64 = (uint64_t*)p_in;
 226             p_out64 = (uint64_t*)p_out;
 227
 228             for( ; (ptrdiff_t)p_in64 < (ptrdiff_t)p_line_end ; )
 229             {
 230                 /* Do 64 pixels at a time */
 231                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 232                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 233                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 234                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 235             }
 236
 237             p_in = (uint8_t*)p_in64;
 238             p_out = (uint8_t*)p_out64;
 239             p_line_end += 64;
 240
 241             for( ; p_in < p_line_end ; )
 242             {
 243                 *p_out++ = ~( *p_in++ );
 244             }
 245
 246             p_in += p_pic->p[i_index].i_pitch
 247                      - p_pic->p[i_index].i_visible_pitch;
 248             p_out += p_outpic->p[i_index].i_pitch
 249                      - p_outpic->p[i_index].i_visible_pitch;
 250         }
 251     }
 252
 253     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 254
 255     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 256 }
 257
 258 /*****************************************************************************
 259  * SendEvents: forward mouse and keyboard events to the parent p_vout
 260  *****************************************************************************/
 261 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 262                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 263 {
 264     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 265
 266     return VLC_SUCCESS;
 267 }
 268
 269 /*****************************************************************************
 270  * SendEventsToChild: forward events to the child/children vout
 271  *****************************************************************************/
 272 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 273                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 274 {
 275     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 276     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 277     return VLC_SUCCESS;
 278 }