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_capability( "video filter", 0 );
  54     add_shortcut( "invert" );
  55     set_callbacks( Create, Destroy );
  56 vlc_module_end();
  57
  58 /*****************************************************************************
  59  * vout_sys_t: Invert video output method descriptor
  60  *****************************************************************************
  61  * This structure is part of the video output thread descriptor.
  62  * It describes the Invert specific properties of an output thread.
  63  *****************************************************************************/
  64 struct vout_sys_t
  65 {
  66     vout_thread_t *p_vout;
  67 };
  68
  69 /*****************************************************************************
  70  * Control: control facility for the vout (forwards to child vout)
  71  *****************************************************************************/
  72 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
  73 {
  74     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
  75 }
  76
  77 /*****************************************************************************
  78  * Create: allocates Invert video thread output method
  79  *****************************************************************************
  80  * This function allocates and initializes a Invert vout method.
  81  *****************************************************************************/
  82 static int Create( vlc_object_t *p_this )
  83 {
  84     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  85
  86     /* Allocate structure */
  87     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  88     if( p_vout->p_sys == NULL )
  89     {
  90         msg_Err( p_vout, "out of memory" );
  91         return VLC_ENOMEM;
  92     }
  93
  94     p_vout->pf_init = Init;
  95     p_vout->pf_end = End;
  96     p_vout->pf_manage = NULL;
  97     p_vout->pf_render = Render;
  98     p_vout->pf_display = NULL;
  99     p_vout->pf_control = Control;
 100
 101     return VLC_SUCCESS;
 102 }
 103
 104 /*****************************************************************************
 105  * Init: initialize Invert video thread output method
 106  *****************************************************************************/
 107 static int Init( vout_thread_t *p_vout )
 108 {
 109     int i_index;
 110     picture_t *p_pic;
 111
 112     I_OUTPUTPICTURES = 0;
 113
 114     /* Initialize the output structure */
 115     p_vout->output.i_chroma = p_vout->render.i_chroma;
 116     p_vout->output.i_width  = p_vout->render.i_width;
 117     p_vout->output.i_height = p_vout->render.i_height;
 118     p_vout->output.i_aspect = p_vout->render.i_aspect;
 119
 120     /* Try to open the real video output */
 121     msg_Dbg( p_vout, "spawning the real video output" );
 122
 123     p_vout->p_sys->p_vout = vout_Create( p_vout,
 124                            p_vout->render.i_width, p_vout->render.i_height,
 125                            p_vout->render.i_chroma, p_vout->render.i_aspect );
 126
 127     /* Everything failed */
 128     if( p_vout->p_sys->p_vout == NULL )
 129     {
 130         msg_Err( p_vout, "can't open vout, aborting" );
 131
 132         return VLC_EGENERIC;
 133     }
 134
 135     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 136
 137     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 138
 139     ADD_PARENT_CALLBACKS( SendEventsToChild );
 140
 141     return VLC_SUCCESS;
 142 }
 143
 144 /*****************************************************************************
 145  * End: terminate Invert video thread output method
 146  *****************************************************************************/
 147 static void End( vout_thread_t *p_vout )
 148 {
 149     int i_index;
 150
 151     /* Free the fake output buffers we allocated */
 152     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 153     {
 154         i_index--;
 155         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 156     }
 157 }
 158
 159 /*****************************************************************************
 160  * Destroy: destroy Invert video thread output method
 161  *****************************************************************************
 162  * Terminate an output method created by InvertCreateOutputMethod
 163  *****************************************************************************/
 164 static void Destroy( vlc_object_t *p_this )
 165 {
 166     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 167
 168     if( p_vout->p_sys->p_vout )
 169     {
 170         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 171         vlc_object_detach( p_vout->p_sys->p_vout );
 172         vout_Destroy( p_vout->p_sys->p_vout );
 173     }
 174
 175     DEL_PARENT_CALLBACKS( SendEventsToChild );
 176
 177     free( p_vout->p_sys );
 178 }
 179
 180 /*****************************************************************************
 181  * Render: displays previously rendered output
 182  *****************************************************************************
 183  * This function send the currently rendered image to Invert image, waits
 184  * until it is displayed and switch the two rendering buffers, preparing next
 185  * frame.
 186  *****************************************************************************/
 187 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 188 {
 189     picture_t *p_outpic;
 190     int i_index;
 191
 192     /* This is a new frame. Get a structure from the video_output. */
 193     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 194               == NULL )
 195     {
 196         if( p_vout->b_die || p_vout->b_error )
 197         {
 198             return;
 199         }
 200         msleep( VOUT_OUTMEM_SLEEP );
 201     }
 202
 203     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 204     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 205
 206     for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 207     {
 208         uint8_t *p_in, *p_in_end, *p_line_end, *p_out;
 209
 210         p_in = p_pic->p[i_index].p_pixels;
 211         p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 212                            * p_pic->p[i_index].i_pitch;
 213
 214         p_out = p_outpic->p[i_index].p_pixels;
 215
 216         for( ; p_in < p_in_end ; )
 217         {
 218             uint64_t *p_in64, *p_out64;
 219
 220             p_line_end = p_in + p_pic->p[i_index].i_visible_pitch - 64;
 221
 222             p_in64 = (uint64_t*)p_in;
 223             p_out64 = (uint64_t*)p_out;
 224
 225             for( ; (ptrdiff_t)p_in64 < (ptrdiff_t)p_line_end ; )
 226             {
 227                 /* Do 64 pixels at a time */
 228                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 229                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 230                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 231                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 232             }
 233
 234             p_in = (uint8_t*)p_in64;
 235             p_out = (uint8_t*)p_out64;
 236             p_line_end += 64;
 237
 238             for( ; p_in < p_line_end ; )
 239             {
 240                 *p_out++ = ~( *p_in++ );
 241             }
 242
 243             p_in += p_pic->p[i_index].i_pitch
 244                      - p_pic->p[i_index].i_visible_pitch;
 245             p_out += p_outpic->p[i_index].i_pitch
 246                      - p_outpic->p[i_index].i_visible_pitch;
 247         }
 248     }
 249
 250     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 251
 252     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 253 }
 254
 255 /*****************************************************************************
 256  * SendEvents: forward mouse and keyboard events to the parent p_vout
 257  *****************************************************************************/
 258 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 259                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 260 {
 261     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 262
 263     return VLC_SUCCESS;
 264 }
 265
 266 /*****************************************************************************
 267  * SendEventsToChild: forward events to the child/children vout
 268  *****************************************************************************/
 269 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 270                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 271 {
 272     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 273     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 274     return VLC_SUCCESS;
 275 }