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_category( CAT_VIDEO );
  54     set_subcategory( SUBCAT_VIDEO_VFILTER );
  55     set_capability( "video filter", 0 );
  56     add_shortcut( "invert" );
  57     set_callbacks( Create, Destroy );
  58 vlc_module_end();
  59
  60 /*****************************************************************************
  61  * vout_sys_t: Invert video output method descriptor
  62  *****************************************************************************
  63  * This structure is part of the video output thread descriptor.
  64  * It describes the Invert specific properties of an output thread.
  65  *****************************************************************************/
  66 struct vout_sys_t
  67 {
  68     vout_thread_t *p_vout;
  69 };
  70
  71 /*****************************************************************************
  72  * Control: control facility for the vout (forwards to child vout)
  73  *****************************************************************************/
  74 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
  75 {
  76     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
  77 }
  78
  79 /*****************************************************************************
  80  * Create: allocates Invert video thread output method
  81  *****************************************************************************
  82  * This function allocates and initializes a Invert vout method.
  83  *****************************************************************************/
  84 static int Create( vlc_object_t *p_this )
  85 {
  86     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  87
  88     /* Allocate structure */
  89     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  90     if( p_vout->p_sys == NULL )
  91     {
  92         msg_Err( p_vout, "out of memory" );
  93         return VLC_ENOMEM;
  94     }
  95
  96     p_vout->pf_init = Init;
  97     p_vout->pf_end = End;
  98     p_vout->pf_manage = NULL;
  99     p_vout->pf_render = Render;
 100     p_vout->pf_display = NULL;
 101     p_vout->pf_control = Control;
 102
 103     return VLC_SUCCESS;
 104 }
 105
 106 /*****************************************************************************
 107  * Init: initialize Invert video thread output method
 108  *****************************************************************************/
 109 static int Init( vout_thread_t *p_vout )
 110 {
 111     int i_index;
 112     picture_t *p_pic;
 113
 114     I_OUTPUTPICTURES = 0;
 115
 116     /* Initialize the output structure */
 117     p_vout->output.i_chroma = p_vout->render.i_chroma;
 118     p_vout->output.i_width  = p_vout->render.i_width;
 119     p_vout->output.i_height = p_vout->render.i_height;
 120     p_vout->output.i_aspect = p_vout->render.i_aspect;
 121
 122     /* Try to open the real video output */
 123     msg_Dbg( p_vout, "spawning the real video output" );
 124
 125     p_vout->p_sys->p_vout = vout_Create( p_vout,
 126                            p_vout->render.i_width, p_vout->render.i_height,
 127                            p_vout->render.i_chroma, p_vout->render.i_aspect );
 128
 129     /* Everything failed */
 130     if( p_vout->p_sys->p_vout == NULL )
 131     {
 132         msg_Err( p_vout, "can't open vout, aborting" );
 133
 134         return VLC_EGENERIC;
 135     }
 136
 137     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 138
 139     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 140
 141     ADD_PARENT_CALLBACKS( SendEventsToChild );
 142
 143     return VLC_SUCCESS;
 144 }
 145
 146 /*****************************************************************************
 147  * End: terminate Invert video thread output method
 148  *****************************************************************************/
 149 static void End( vout_thread_t *p_vout )
 150 {
 151     int i_index;
 152
 153     /* Free the fake output buffers we allocated */
 154     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 155     {
 156         i_index--;
 157         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 158     }
 159 }
 160
 161 /*****************************************************************************
 162  * Destroy: destroy Invert video thread output method
 163  *****************************************************************************
 164  * Terminate an output method created by InvertCreateOutputMethod
 165  *****************************************************************************/
 166 static void Destroy( vlc_object_t *p_this )
 167 {
 168     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 169
 170     if( p_vout->p_sys->p_vout )
 171     {
 172         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 173         vlc_object_detach( p_vout->p_sys->p_vout );
 174         vout_Destroy( p_vout->p_sys->p_vout );
 175     }
 176
 177     DEL_PARENT_CALLBACKS( SendEventsToChild );
 178
 179     free( p_vout->p_sys );
 180 }
 181
 182 /*****************************************************************************
 183  * Render: displays previously rendered output
 184  *****************************************************************************
 185  * This function send the currently rendered image to Invert image, waits
 186  * until it is displayed and switch the two rendering buffers, preparing next
 187  * frame.
 188  *****************************************************************************/
 189 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 190 {
 191     picture_t *p_outpic;
 192     int i_index;
 193
 194     /* This is a new frame. Get a structure from the video_output. */
 195     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 196               == NULL )
 197     {
 198         if( p_vout->b_die || p_vout->b_error )
 199         {
 200             return;
 201         }
 202         msleep( VOUT_OUTMEM_SLEEP );
 203     }
 204
 205     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 206     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 207
 208     for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 209     {
 210         uint8_t *p_in, *p_in_end, *p_line_end, *p_out;
 211
 212         p_in = p_pic->p[i_index].p_pixels;
 213         p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 214                            * p_pic->p[i_index].i_pitch;
 215
 216         p_out = p_outpic->p[i_index].p_pixels;
 217
 218         for( ; p_in < p_in_end ; )
 219         {
 220             uint64_t *p_in64, *p_out64;
 221
 222             p_line_end = p_in + p_pic->p[i_index].i_visible_pitch - 64;
 223
 224             p_in64 = (uint64_t*)p_in;
 225             p_out64 = (uint64_t*)p_out;
 226
 227             for( ; (ptrdiff_t)p_in64 < (ptrdiff_t)p_line_end ; )
 228             {
 229                 /* Do 64 pixels at a time */
 230                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 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             }
 235
 236             p_in = (uint8_t*)p_in64;
 237             p_out = (uint8_t*)p_out64;
 238             p_line_end += 64;
 239
 240             for( ; p_in < p_line_end ; )
 241             {
 242                 *p_out++ = ~( *p_in++ );
 243             }
 244
 245             p_in += p_pic->p[i_index].i_pitch
 246                      - p_pic->p[i_index].i_visible_pitch;
 247             p_out += p_outpic->p[i_index].i_pitch
 248                      - p_outpic->p[i_index].i_visible_pitch;
 249         }
 250     }
 251
 252     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 253
 254     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 255 }
 256
 257 /*****************************************************************************
 258  * SendEvents: forward mouse and keyboard events to the parent p_vout
 259  *****************************************************************************/
 260 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 261                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 262 {
 263     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 264
 265     return VLC_SUCCESS;
 266 }
 267
 268 /*****************************************************************************
 269  * SendEventsToChild: forward events to the child/children vout
 270  *****************************************************************************/
 271 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 272                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 273 {
 274     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 275     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 276     return VLC_SUCCESS;
 277 }