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: invert.c,v 1.9 2004/01/25 03:28:41 hartman Exp $
   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  * Create: allocates Invert video thread output method
  71  *****************************************************************************
  72  * This function allocates and initializes a Invert vout method.
  73  *****************************************************************************/
  74 static int Create( vlc_object_t *p_this )
  75 {
  76     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  77
  78     /* Allocate structure */
  79     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  80     if( p_vout->p_sys == NULL )
  81     {
  82         msg_Err( p_vout, "out of memory" );
  83         return VLC_ENOMEM;
  84     }
  85
  86     p_vout->pf_init = Init;
  87     p_vout->pf_end = End;
  88     p_vout->pf_manage = NULL;
  89     p_vout->pf_render = Render;
  90     p_vout->pf_display = NULL;
  91
  92     return VLC_SUCCESS;
  93 }
  94
  95 /*****************************************************************************
  96  * Init: initialize Invert video thread output method
  97  *****************************************************************************/
  98 static int Init( vout_thread_t *p_vout )
  99 {
 100     int i_index;
 101     picture_t *p_pic;
 102
 103     I_OUTPUTPICTURES = 0;
 104
 105     /* Initialize the output structure */
 106     p_vout->output.i_chroma = p_vout->render.i_chroma;
 107     p_vout->output.i_width  = p_vout->render.i_width;
 108     p_vout->output.i_height = p_vout->render.i_height;
 109     p_vout->output.i_aspect = p_vout->render.i_aspect;
 110
 111     /* Try to open the real video output */
 112     msg_Dbg( p_vout, "spawning the real video output" );
 113
 114     p_vout->p_sys->p_vout = vout_Create( p_vout,
 115                            p_vout->render.i_width, p_vout->render.i_height,
 116                            p_vout->render.i_chroma, p_vout->render.i_aspect );
 117
 118     /* Everything failed */
 119     if( p_vout->p_sys->p_vout == NULL )
 120     {
 121         msg_Err( p_vout, "can't open vout, aborting" );
 122
 123         return VLC_EGENERIC;
 124     }
 125
 126     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 127
 128     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 129
 130     ADD_PARENT_CALLBACKS( SendEventsToChild );
 131
 132     return VLC_SUCCESS;
 133 }
 134
 135 /*****************************************************************************
 136  * End: terminate Invert video thread output method
 137  *****************************************************************************/
 138 static void End( vout_thread_t *p_vout )
 139 {
 140     int i_index;
 141
 142     /* Free the fake output buffers we allocated */
 143     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 144     {
 145         i_index--;
 146         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 147     }
 148 }
 149
 150 /*****************************************************************************
 151  * Destroy: destroy Invert video thread output method
 152  *****************************************************************************
 153  * Terminate an output method created by InvertCreateOutputMethod
 154  *****************************************************************************/
 155 static void Destroy( vlc_object_t *p_this )
 156 {
 157     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 158
 159     DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 160     vlc_object_detach( p_vout->p_sys->p_vout );
 161     vout_Destroy( p_vout->p_sys->p_vout );
 162
 163     DEL_PARENT_CALLBACKS( SendEventsToChild );
 164
 165     free( p_vout->p_sys );
 166 }
 167
 168 /*****************************************************************************
 169  * Render: displays previously rendered output
 170  *****************************************************************************
 171  * This function send the currently rendered image to Invert image, waits
 172  * until it is displayed and switch the two rendering buffers, preparing next
 173  * frame.
 174  *****************************************************************************/
 175 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 176 {
 177     picture_t *p_outpic;
 178     int i_index;
 179
 180     /* This is a new frame. Get a structure from the video_output. */
 181     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 182               == NULL )
 183     {
 184         if( p_vout->b_die || p_vout->b_error )
 185         {
 186             return;
 187         }
 188         msleep( VOUT_OUTMEM_SLEEP );
 189     }
 190
 191     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 192     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 193
 194     for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 195     {
 196         uint8_t *p_in, *p_in_end, *p_line_end, *p_out;
 197
 198         p_in = p_pic->p[i_index].p_pixels;
 199         p_in_end = p_in + p_pic->p[i_index].i_lines
 200                            * p_pic->p[i_index].i_pitch;
 201
 202         p_out = p_outpic->p[i_index].p_pixels;
 203
 204         for( ; p_in < p_in_end ; )
 205         {
 206             p_line_end = p_in + p_pic->p[i_index].i_visible_pitch - 64;
 207
 208             for( ; p_in < p_line_end ; )
 209             {
 210                 /* Do 64 pixels at a time */
 211                 *((uint64_t*)p_out)++ = ~( *((uint64_t*)p_in)++ );
 212                 *((uint64_t*)p_out)++ = ~( *((uint64_t*)p_in)++ );
 213                 *((uint64_t*)p_out)++ = ~( *((uint64_t*)p_in)++ );
 214                 *((uint64_t*)p_out)++ = ~( *((uint64_t*)p_in)++ );
 215                 *((uint64_t*)p_out)++ = ~( *((uint64_t*)p_in)++ );
 216                 *((uint64_t*)p_out)++ = ~( *((uint64_t*)p_in)++ );
 217                 *((uint64_t*)p_out)++ = ~( *((uint64_t*)p_in)++ );
 218                 *((uint64_t*)p_out)++ = ~( *((uint64_t*)p_in)++ );
 219             }
 220
 221             p_line_end += 64;
 222
 223             for( ; p_in < p_line_end ; )
 224             {
 225                 *p_out++ = ~( *p_in++ );
 226             }
 227
 228             p_in += p_pic->p[i_index].i_pitch
 229                      - p_pic->p[i_index].i_visible_pitch;
 230             p_out += p_outpic->p[i_index].i_pitch
 231                      - p_outpic->p[i_index].i_visible_pitch;
 232         }
 233     }
 234
 235     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 236
 237     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 238 }
 239
 240 /*****************************************************************************
 241  * SendEvents: forward mouse and keyboard events to the parent p_vout
 242  *****************************************************************************/
 243 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 244                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 245 {
 246     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 247
 248     return VLC_SUCCESS;
 249 }
 250
 251 /*****************************************************************************
 252  * SendEventsToChild: forward events to the child/children vout
 253  *****************************************************************************/
 254 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 255                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 256 {
 257     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 258     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 259     return VLC_SUCCESS;
 260 }