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 1.7 2003/03/30 18:14:38 gbazin 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     return VLC_SUCCESS;
 131 }
 132
 133 /*****************************************************************************
 134  * End: terminate Invert video thread output method
 135  *****************************************************************************/
 136 static void End( vout_thread_t *p_vout )
 137 {
 138     int i_index;
 139
 140     /* Free the fake output buffers we allocated */
 141     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 142     {
 143         i_index--;
 144         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 145     }
 146 }
 147
 148 /*****************************************************************************
 149  * Destroy: destroy Invert video thread output method
 150  *****************************************************************************
 151  * Terminate an output method created by InvertCreateOutputMethod
 152  *****************************************************************************/
 153 static void Destroy( vlc_object_t *p_this )
 154 {
 155     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 156
 157     DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 158     vlc_object_detach( p_vout->p_sys->p_vout );
 159     vout_Destroy( p_vout->p_sys->p_vout );
 160
 161     free( p_vout->p_sys );
 162 }
 163
 164 /*****************************************************************************
 165  * Render: displays previously rendered output
 166  *****************************************************************************
 167  * This function send the currently rendered image to Invert image, waits
 168  * until it is displayed and switch the two rendering buffers, preparing next
 169  * frame.
 170  *****************************************************************************/
 171 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 172 {
 173     picture_t *p_outpic;
 174     int i_index;
 175
 176     /* This is a new frame. Get a structure from the video_output. */
 177     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 178               == NULL )
 179     {
 180         if( p_vout->b_die || p_vout->b_error )
 181         {
 182             return;
 183         }
 184         msleep( VOUT_OUTMEM_SLEEP );
 185     }
 186
 187     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 188     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 189
 190     for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 191     {
 192         uint8_t *p_in, *p_in_end, *p_line_end, *p_out;
 193
 194         p_in = p_pic->p[i_index].p_pixels;
 195         p_in_end = p_in + p_pic->p[i_index].i_lines
 196                            * p_pic->p[i_index].i_pitch;
 197
 198         p_out = p_outpic->p[i_index].p_pixels;
 199
 200         for( ; p_in < p_in_end ; )
 201         {
 202             p_line_end = p_in + p_pic->p[i_index].i_visible_pitch - 64;
 203
 204             for( ; p_in < p_line_end ; )
 205             {
 206                 /* Do 64 pixels at a time */
 207                 *((uint64_t*)p_out)++ = ~( *((uint64_t*)p_in)++ );
 208                 *((uint64_t*)p_out)++ = ~( *((uint64_t*)p_in)++ );
 209                 *((uint64_t*)p_out)++ = ~( *((uint64_t*)p_in)++ );
 210                 *((uint64_t*)p_out)++ = ~( *((uint64_t*)p_in)++ );
 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             }
 216
 217             p_line_end += 64;
 218
 219             for( ; p_in < p_line_end ; )
 220             {
 221                 *p_out++ = ~( *p_in++ );
 222             }
 223
 224             p_in += p_pic->p[i_index].i_pitch
 225                      - p_pic->p[i_index].i_visible_pitch;
 226             p_out += p_outpic->p[i_index].i_pitch
 227                      - p_outpic->p[i_index].i_visible_pitch;
 228         }
 229     }
 230
 231     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 232
 233     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 234 }
 235
 236 /*****************************************************************************
 237  * SendEvents: forward mouse and keyboard events to the parent p_vout
 238  *****************************************************************************/
 239 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 240                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 241 {
 242     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 243
 244     return VLC_SUCCESS;
 245 }
 246