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 the VideoLAN team
   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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, 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     p_vout->fmt_out = p_vout->fmt_in;
 124     fmt = p_vout->fmt_out;
 125
 126     /* Try to open the real video output */
 127     msg_Dbg( p_vout, "spawning the real video output" );
 128
 129     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 130
 131     /* Everything failed */
 132     if( p_vout->p_sys->p_vout == NULL )
 133     {
 134         msg_Err( p_vout, "can't open vout, aborting" );
 135
 136         return VLC_EGENERIC;
 137     }
 138
 139     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 140
 141     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 142
 143     ADD_PARENT_CALLBACKS( SendEventsToChild );
 144
 145     return VLC_SUCCESS;
 146 }
 147
 148 /*****************************************************************************
 149  * End: terminate Invert video thread output method
 150  *****************************************************************************/
 151 static void End( vout_thread_t *p_vout )
 152 {
 153     int i_index;
 154
 155     /* Free the fake output buffers we allocated */
 156     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 157     {
 158         i_index--;
 159         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 160     }
 161 }
 162
 163 /*****************************************************************************
 164  * Destroy: destroy Invert video thread output method
 165  *****************************************************************************
 166  * Terminate an output method created by InvertCreateOutputMethod
 167  *****************************************************************************/
 168 static void Destroy( vlc_object_t *p_this )
 169 {
 170     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 171
 172     if( p_vout->p_sys->p_vout )
 173     {
 174         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 175         vlc_object_detach( p_vout->p_sys->p_vout );
 176         vout_Destroy( p_vout->p_sys->p_vout );
 177     }
 178
 179     DEL_PARENT_CALLBACKS( SendEventsToChild );
 180
 181     free( p_vout->p_sys );
 182 }
 183
 184 /*****************************************************************************
 185  * Render: displays previously rendered output
 186  *****************************************************************************
 187  * This function send the currently rendered image to Invert image, waits
 188  * until it is displayed and switch the two rendering buffers, preparing next
 189  * frame.
 190  *****************************************************************************/
 191 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 192 {
 193     picture_t *p_outpic;
 194     int i_index;
 195
 196     /* This is a new frame. Get a structure from the video_output. */
 197     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 198               == NULL )
 199     {
 200         if( p_vout->b_die || p_vout->b_error )
 201         {
 202             return;
 203         }
 204         msleep( VOUT_OUTMEM_SLEEP );
 205     }
 206
 207     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 208     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 209
 210     for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 211     {
 212         uint8_t *p_in, *p_in_end, *p_line_end, *p_out;
 213
 214         p_in = p_pic->p[i_index].p_pixels;
 215         p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 216                            * p_pic->p[i_index].i_pitch;
 217
 218         p_out = p_outpic->p[i_index].p_pixels;
 219
 220         for( ; p_in < p_in_end ; )
 221         {
 222             uint64_t *p_in64, *p_out64;
 223
 224             p_line_end = p_in + p_pic->p[i_index].i_visible_pitch - 64;
 225
 226             p_in64 = (uint64_t*)p_in;
 227             p_out64 = (uint64_t*)p_out;
 228
 229             for( ; (ptrdiff_t)p_in64 < (ptrdiff_t)p_line_end ; )
 230             {
 231                 /* Do 64 pixels at a time */
 232                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 233                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 234                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 235                 *p_out64++ = ~*p_in64++; *p_out64++ = ~*p_in64++;
 236             }
 237
 238             p_in = (uint8_t*)p_in64;
 239             p_out = (uint8_t*)p_out64;
 240             p_line_end += 64;
 241
 242             for( ; p_in < p_line_end ; )
 243             {
 244                 *p_out++ = ~( *p_in++ );
 245             }
 246
 247             p_in += p_pic->p[i_index].i_pitch
 248                      - p_pic->p[i_index].i_visible_pitch;
 249             p_out += p_outpic->p[i_index].i_pitch
 250                      - p_outpic->p[i_index].i_visible_pitch;
 251         }
 252     }
 253
 254     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 255
 256     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 257 }
 258
 259 /*****************************************************************************
 260  * SendEvents: forward mouse and keyboard events to the parent p_vout
 261  *****************************************************************************/
 262 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 263                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 264 {
 265     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 266
 267     return VLC_SUCCESS;
 268 }
 269
 270 /*****************************************************************************
 271  * SendEventsToChild: forward events to the child/children vout
 272  *****************************************************************************/
 273 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 274                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 275 {
 276     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 277     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 278     return VLC_SUCCESS;
 279 }