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     video_format_t fmt = {0};
 115
 116     I_OUTPUTPICTURES = 0;
 117
 118     /* Initialize the output structure */
 119     p_vout->output.i_chroma = p_vout->render.i_chroma;
 120     p_vout->output.i_width  = p_vout->render.i_width;
 121     p_vout->output.i_height = p_vout->render.i_height;
 122     p_vout->output.i_aspect = p_vout->render.i_aspect;
 123
 124     fmt.i_width = fmt.i_visible_width = p_vout->render.i_width;
 125     fmt.i_height = fmt.i_visible_height = p_vout->render.i_height;
 126     fmt.i_x_offset = fmt.i_y_offset = 0;
 127     fmt.i_chroma = p_vout->render.i_chroma;
 128     fmt.i_aspect = p_vout->render.i_aspect;
 129     fmt.i_sar_num = p_vout->render.i_aspect * fmt.i_height / fmt.i_width;
 130     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 131
 132     /* Try to open the real video output */
 133     msg_Dbg( p_vout, "spawning the real video output" );
 134
 135     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 136
 137     /* Everything failed */
 138     if( p_vout->p_sys->p_vout == NULL )
 139     {
 140         msg_Err( p_vout, "can't open vout, aborting" );
 141
 142         return VLC_EGENERIC;
 143     }
 144
 145     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 146
 147     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 148
 149     ADD_PARENT_CALLBACKS( SendEventsToChild );
 150
 151     return VLC_SUCCESS;
 152 }
 153
 154 /*****************************************************************************
 155  * End: terminate Invert video thread output method
 156  *****************************************************************************/
 157 static void End( vout_thread_t *p_vout )
 158 {
 159     int i_index;
 160
 161     /* Free the fake output buffers we allocated */
 162     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 163     {
 164         i_index--;
 165         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 166     }
 167 }
 168
 169 /*****************************************************************************
 170  * Destroy: destroy Invert video thread output method
 171  *****************************************************************************
 172  * Terminate an output method created by InvertCreateOutputMethod
 173  *****************************************************************************/
 174 static void Destroy( vlc_object_t *p_this )
 175 {
 176     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 177
 178     if( p_vout->p_sys->p_vout )
 179     {
 180         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 181         vlc_object_detach( p_vout->p_sys->p_vout );
 182         vout_Destroy( p_vout->p_sys->p_vout );
 183     }
 184
 185     DEL_PARENT_CALLBACKS( SendEventsToChild );
 186
 187     free( p_vout->p_sys );
 188 }
 189
 190 /*****************************************************************************
 191  * Render: displays previously rendered output
 192  *****************************************************************************
 193  * This function send the currently rendered image to Invert image, waits
 194  * until it is displayed and switch the two rendering buffers, preparing next
 195  * frame.
 196  *****************************************************************************/
 197 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 198 {
 199     picture_t *p_outpic;
 200     int i_index;
 201
 202     /* This is a new frame. Get a structure from the video_output. */
 203     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 204               == NULL )
 205     {
 206         if( p_vout->b_die || p_vout->b_error )
 207         {
 208             return;
 209         }
 210         msleep( VOUT_OUTMEM_SLEEP );
 211     }
 212
 213     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 214     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 215
 216     for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 217     {
 218         uint8_t *p_in, *p_in_end, *p_line_end, *p_out;
 219
 220         p_in = p_pic->p[i_index].p_pixels;
 221         p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 222                            * p_pic->p[i_index].i_pitch;
 223
 224         p_out = p_outpic->p[i_index].p_pixels;
 225
 226         for( ; p_in < p_in_end ; )
 227         {
 228             uint64_t *p_in64, *p_out64;
 229
 230             p_line_end = p_in + p_pic->p[i_index].i_visible_pitch - 64;
 231
 232             p_in64 = (uint64_t*)p_in;
 233             p_out64 = (uint64_t*)p_out;
 234
 235             for( ; (ptrdiff_t)p_in64 < (ptrdiff_t)p_line_end ; )
 236             {
 237                 /* Do 64 pixels at a time */
 238                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 239                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 240                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 241                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 242             }
 243
 244             p_in = (uint8_t*)p_in64;
 245             p_out = (uint8_t*)p_out64;
 246             p_line_end += 64;
 247
 248             for( ; p_in < p_line_end ; )
 249             {
 250                 *p_out++ = ~( *p_in++ );
 251             }
 252
 253             p_in += p_pic->p[i_index].i_pitch
 254                      - p_pic->p[i_index].i_visible_pitch;
 255             p_out += p_outpic->p[i_index].i_pitch
 256                      - p_outpic->p[i_index].i_visible_pitch;
 257         }
 258     }
 259
 260     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 261
 262     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 263 }
 264
 265 /*****************************************************************************
 266  * SendEvents: forward mouse and keyboard events to the parent p_vout
 267  *****************************************************************************/
 268 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 269                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 270 {
 271     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 272
 273     return VLC_SUCCESS;
 274 }
 275
 276 /*****************************************************************************
 277  * SendEventsToChild: forward events to the child/children vout
 278  *****************************************************************************/
 279 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 280                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 281 {
 282     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 283     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 284     return VLC_SUCCESS;
 285 }