git.sesse.net Git - vlc/blob - modules/video_filter/motionblur.c

   1 /*****************************************************************************
   2  * motion_blur.c : motion blur filter for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001 VideoLAN
   5  * $Id: motionblur.c,v 1.4 2002/11/28 17:35:00 sam Exp $
   6  *
   7  * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
   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 protypes
  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 void RenderBlur    ( vout_thread_t *, picture_t *, picture_t *, picture_t * );
  46 static void CopyPicture ( vout_thread_t*, picture_t *, picture_t * );
  47
  48 /*****************************************************************************
  49  * Module descriptor
  50  *****************************************************************************/
  51 #define MODE_TEXT N_("Blur factor")
  52 #define MODE_LONGTEXT N_("The degree of blurring from 1 to 127")
  53
  54 vlc_module_begin();
  55     add_category_hint( N_("Miscellaneous"), NULL );
  56     add_integer( "blur-factor", 80, NULL, MODE_TEXT, MODE_LONGTEXT );
  57     set_description( _("Motion blur filter") );
  58     set_capability( "video filter", 0 );
  59     set_callbacks( Create, Destroy );
  60 vlc_module_end();
  61
  62 /*****************************************************************************
  63  * vout_sys_t: Deinterlace video output method descriptor
  64  *****************************************************************************
  65  * This structure is part of the video output thread descriptor.
  66  * It describes the Deinterlace specific properties of an output thread.
  67  *****************************************************************************/
  68 struct vout_sys_t
  69 {
  70     int        i_factor;        /* Deinterlace mode */
  71     vlc_bool_t b_double_rate; /* Shall we double the framerate? */
  72
  73     mtime_t    last_date;
  74     mtime_t    next_date;
  75
  76     vout_thread_t *p_vout;
  77     picture_t *p_lastpic;
  78 };
  79
  80 /*****************************************************************************
  81  * Create: allocates Deinterlace video thread output method
  82  *****************************************************************************
  83  * This function allocates and initializes a Deinterlace 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 1;
  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
 103     p_vout->p_sys->i_factor = config_GetInt( p_vout, "blur-factor" );
 104     p_vout->p_sys->b_double_rate = 0;
 105     p_vout->p_sys->last_date = 0;
 106     p_vout->p_sys->p_lastpic = NULL;
 107
 108     return 0;
 109 }
 110
 111 /*****************************************************************************
 112  * Init: initialize Deinterlace video thread output method
 113  *****************************************************************************/
 114 static int Init( vout_thread_t *p_vout )
 115 {
 116     int i_index;
 117     picture_t *p_pic;
 118
 119     I_OUTPUTPICTURES = 0;
 120
 121     /* Initialize the output structure, full of directbuffers since we want
 122      * the decoder to output directly to our structures. */
 123     switch( p_vout->render.i_chroma )
 124     {
 125         case VLC_FOURCC('I','4','2','0'):
 126         case VLC_FOURCC('I','Y','U','V'):
 127         case VLC_FOURCC('Y','V','1','2'):
 128         case VLC_FOURCC('I','4','2','2'):
 129             p_vout->output.i_chroma = p_vout->render.i_chroma;
 130             p_vout->output.i_width  = p_vout->render.i_width;
 131             p_vout->output.i_height = p_vout->render.i_height;
 132             p_vout->output.i_aspect = p_vout->render.i_aspect;
 133             break;
 134
 135         default:
 136             return 0; /* unknown chroma */
 137             break;
 138     }
 139
 140     msg_Dbg( p_vout, "spawning the real video output" );
 141
 142     switch( p_vout->render.i_chroma )
 143     {
 144     case VLC_FOURCC('I','4','2','0'):
 145     case VLC_FOURCC('I','Y','U','V'):
 146     case VLC_FOURCC('Y','V','1','2'):
 147         p_vout->p_sys->p_vout = vout_Create( p_vout,
 148                            p_vout->output.i_width, p_vout->output.i_height,
 149                            p_vout->output.i_chroma, p_vout->output.i_aspect );
 150         break;
 151     default:
 152         break;
 153     }
 154
 155     /* Everything failed */
 156     if( p_vout->p_sys->p_vout == NULL )
 157     {
 158         msg_Err( p_vout, "cannot open vout, aborting" );
 159
 160         return 0;
 161     }
 162
 163     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 164
 165     return 0;
 166 }
 167
 168 /*****************************************************************************
 169  * End: terminate Deinterlace video thread output method
 170  *****************************************************************************/
 171 static void End( vout_thread_t *p_vout )
 172 {
 173     int i_index;
 174
 175     /* Free the fake output buffers we allocated */
 176     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 177     {
 178         i_index--;
 179         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 180     }
 181 }
 182
 183 /*****************************************************************************
 184  * Destroy: destroy Deinterlace video thread output method
 185  *****************************************************************************
 186  * Terminate an output method created by DeinterlaceCreateOutputMethod
 187  *****************************************************************************/
 188 static void Destroy( vlc_object_t *p_this )
 189 {
 190     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 191
 192     vout_Destroy( p_vout->p_sys->p_vout );
 193
 194     free( p_vout->p_sys );
 195 }
 196
 197 /*****************************************************************************
 198  * Render: displays previously rendered output
 199  *****************************************************************************
 200  * This function send the currently rendered image to Deinterlace image,
 201  * waits until it is displayed and switch the two rendering buffers, preparing
 202  * next frame.
 203  *****************************************************************************/
 204 static void Render ( vout_thread_t *p_vout, picture_t *p_pic )
 205 {
 206     picture_t * p_outpic;
 207     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 208            == NULL )
 209     {
 210         if( p_vout->b_die || p_vout->b_error )
 211         {
 212             return;
 213         }
 214         msleep( VOUT_OUTMEM_SLEEP );
 215     }
 216     vout_DatePicture( p_vout, p_outpic, p_pic->date );
 217
 218     if ( p_vout->p_sys->p_lastpic == NULL )
 219     {
 220         /* Get a new picture */
 221         while( ( p_vout->p_sys->p_lastpic =
 222                  vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 223                == NULL )
 224         {
 225             if( p_vout->b_die || p_vout->b_error )
 226             {
 227                 return;
 228             }
 229             msleep( VOUT_OUTMEM_SLEEP );
 230         }
 231         CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_pic );
 232         CopyPicture( p_vout, p_outpic, p_pic );
 233         vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 234         return;
 235     }
 236
 237     /* Get a new picture */
 238     RenderBlur( p_vout, p_vout->p_sys->p_lastpic, p_pic, p_outpic );
 239     vout_DestroyPicture( p_vout, p_vout->p_sys->p_lastpic );
 240
 241
 242     /* Get a new picture */
 243     while( ( p_vout->p_sys->p_lastpic =
 244              vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 245            == NULL )
 246     {
 247         if( p_vout->b_die || p_vout->b_error )
 248         {
 249             return;
 250         }
 251         msleep( VOUT_OUTMEM_SLEEP );
 252     }
 253     CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_outpic );
 254     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 255
 256 }
 257
 258 static void CopyPicture( vout_thread_t *p_vout,
 259                          picture_t *p_dest, picture_t *p_source)
 260 {
 261     int i_plane;
 262
 263     for( i_plane = 0 ; i_plane < p_dest->i_planes ; i_plane++ )
 264     {
 265         u8 *p_in, *p_out;
 266
 267         p_in = p_source->p[i_plane].p_pixels;
 268
 269         p_out = p_dest->p[i_plane].p_pixels;
 270         p_vout->p_vlc->pf_memcpy( p_out, p_in,
 271                                   p_dest->p[i_plane].i_pitch *
 272                                   p_dest->p[i_plane].i_lines);
 273     }
 274 }
 275 /*****************************************************************************
 276  * RenderBob: renders a bob picture
 277  *****************************************************************************/
 278 static void RenderBlur( vout_thread_t *p_vout, picture_t *p_oldpic,
 279                         picture_t *p_newpic, picture_t *p_outpic )
 280 {
 281     int i_plane;
 282     int i_oldfactor = p_vout->p_sys->i_factor;
 283     int i_newfactor = 128 - p_vout->p_sys->i_factor;
 284     for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
 285     {
 286         u8 *p_old, *p_new, *p_out, *p_out_end;
 287         p_out = p_outpic->p[i_plane].p_pixels;
 288         p_new = p_newpic->p[i_plane].p_pixels;
 289         p_old = p_oldpic->p[i_plane].p_pixels;
 290         p_out_end = p_out + p_outpic->p[i_plane].i_pitch *
 291             p_outpic->p[i_plane].i_lines;
 292         while ( p_out < p_out_end )
 293         {
 294             *p_out++ = (((*p_old++) * i_oldfactor) +
 295                         ((*p_new++) * i_newfactor)) >> 7;
 296
 297 //            *p_out++ = (*p_old++ >> 1) + (*p_new++ >> 1);
 298
 299         }
 300     }
 301 }