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 1.1 2002/08/26 22:35:58 sigmunau 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 <errno.h>
  28 #include <stdlib.h>                                      /* malloc(), free() */
  29 #include <string.h>
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc/vout.h>
  33
  34 #include "filter_common.h"
  35
  36 /*****************************************************************************
  37  * Local protypes
  38  *****************************************************************************/
  39 static int  Create    ( vlc_object_t * );
  40 static void Destroy   ( vlc_object_t * );
  41
  42 static int  Init      ( vout_thread_t * );
  43 static void End       ( vout_thread_t * );
  44 static void Render    ( vout_thread_t *, picture_t * );
  45
  46 static void RenderBlur    ( vout_thread_t *, picture_t *, picture_t *, picture_t * );
  47 static void CopyPicture ( vout_thread_t*, picture_t *, picture_t * );
  48
  49 /*****************************************************************************
  50  * Module descriptor
  51  *****************************************************************************/
  52 #define MODE_TEXT N_("Blur factor")
  53 #define MODE_LONGTEXT N_("The degree of blurring from 1 to 127")
  54
  55 vlc_module_begin();
  56     add_category_hint( N_("Miscellaneous"), NULL );
  57     add_integer( "blur-factor", 80, NULL, MODE_TEXT, MODE_LONGTEXT );
  58     set_description( _("Motion blur filter") );
  59     set_capability( "video filter", 0 );
  60     set_callbacks( Create, Destroy );
  61 vlc_module_end();
  62
  63 /*****************************************************************************
  64  * vout_sys_t: Deinterlace video output method descriptor
  65  *****************************************************************************
  66  * This structure is part of the video output thread descriptor.
  67  * It describes the Deinterlace specific properties of an output thread.
  68  *****************************************************************************/
  69 struct vout_sys_t
  70 {
  71     int        i_factor;        /* Deinterlace mode */
  72     vlc_bool_t b_double_rate; /* Shall we double the framerate? */
  73
  74     mtime_t    last_date;
  75     mtime_t    next_date;
  76
  77     vout_thread_t *p_vout;
  78     picture_t *p_lastpic;
  79 };
  80
  81 /*****************************************************************************
  82  * Create: allocates Deinterlace video thread output method
  83  *****************************************************************************
  84  * This function allocates and initializes a Deinterlace vout method.
  85  *****************************************************************************/
  86 static int Create( vlc_object_t *p_this )
  87 {
  88     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  89
  90     /* Allocate structure */
  91     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  92     if( p_vout->p_sys == NULL )
  93     {
  94         msg_Err( p_vout, "out of memory" );
  95         return 1;
  96     }
  97
  98     p_vout->pf_init = Init;
  99     p_vout->pf_end = End;
 100     p_vout->pf_manage = NULL;
 101     p_vout->pf_render = Render;
 102     p_vout->pf_display = NULL;
 103
 104     p_vout->p_sys->i_factor = config_GetInt( p_vout, "blur-factor" );
 105     p_vout->p_sys->b_double_rate = 0;
 106     p_vout->p_sys->last_date = 0;
 107     p_vout->p_sys->p_lastpic = NULL;
 108
 109     return 0;
 110 }
 111
 112 /*****************************************************************************
 113  * Init: initialize Deinterlace video thread output method
 114  *****************************************************************************/
 115 static int Init( vout_thread_t *p_vout )
 116 {
 117     int i_index;
 118     picture_t *p_pic;
 119
 120     I_OUTPUTPICTURES = 0;
 121
 122     /* Initialize the output structure, full of directbuffers since we want
 123      * the decoder to output directly to our structures. */
 124     switch( p_vout->render.i_chroma )
 125     {
 126         case VLC_FOURCC('I','4','2','0'):
 127         case VLC_FOURCC('I','Y','U','V'):
 128         case VLC_FOURCC('Y','V','1','2'):
 129         case VLC_FOURCC('I','4','2','2'):
 130             p_vout->output.i_chroma = p_vout->render.i_chroma;
 131             p_vout->output.i_width  = p_vout->render.i_width;
 132             p_vout->output.i_height = p_vout->render.i_height;
 133             p_vout->output.i_aspect = p_vout->render.i_aspect;
 134             break;
 135
 136         default:
 137             return 0; /* unknown chroma */
 138             break;
 139     }
 140
 141     msg_Dbg( p_vout, "spawning the real video output" );
 142
 143     switch( p_vout->render.i_chroma )
 144     {
 145     case VLC_FOURCC('I','4','2','0'):
 146     case VLC_FOURCC('I','Y','U','V'):
 147     case VLC_FOURCC('Y','V','1','2'):
 148         p_vout->p_sys->p_vout =
 149             vout_CreateThread( p_vout,
 150                                p_vout->output.i_width, p_vout->output.i_height,
 151                                p_vout->output.i_chroma, p_vout->output.i_aspect );
 152         break;
 153     default:
 154         break;
 155     }
 156
 157     /* Everything failed */
 158     if( p_vout->p_sys->p_vout == NULL )
 159     {
 160         msg_Err( p_vout, "cannot open vout, aborting" );
 161
 162         return 0;
 163     }
 164
 165     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 166
 167     return 0;
 168 }
 169
 170 /*****************************************************************************
 171  * End: terminate Deinterlace video thread output method
 172  *****************************************************************************/
 173 static void End( vout_thread_t *p_vout )
 174 {
 175     int i_index;
 176
 177     /* Free the fake output buffers we allocated */
 178     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 179     {
 180         i_index--;
 181         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 182     }
 183 }
 184
 185 /*****************************************************************************
 186  * Destroy: destroy Deinterlace video thread output method
 187  *****************************************************************************
 188  * Terminate an output method created by DeinterlaceCreateOutputMethod
 189  *****************************************************************************/
 190 static void Destroy( vlc_object_t *p_this )
 191 {
 192     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 193
 194     vout_DestroyThread( p_vout->p_sys->p_vout );
 195
 196     free( p_vout->p_sys );
 197 }
 198
 199 /*****************************************************************************
 200  * Render: displays previously rendered output
 201  *****************************************************************************
 202  * This function send the currently rendered image to Deinterlace image,
 203  * waits until it is displayed and switch the two rendering buffers, preparing
 204  * next frame.
 205  *****************************************************************************/
 206 static void Render ( vout_thread_t *p_vout, picture_t *p_pic )
 207 {
 208     picture_t * p_outpic;
 209     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 210            == NULL )
 211     {
 212         if( p_vout->b_die || p_vout->b_error )
 213         {
 214             return;
 215         }
 216         msleep( VOUT_OUTMEM_SLEEP );
 217     }
 218     vout_DatePicture( p_vout, p_outpic, p_pic->date );
 219
 220     if ( p_vout->p_sys->p_lastpic == NULL )
 221     {
 222         /* Get a new picture */
 223         while( ( p_vout->p_sys->p_lastpic =
 224                  vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 225                == NULL )
 226         {
 227             if( p_vout->b_die || p_vout->b_error )
 228             {
 229                 return;
 230             }
 231             msleep( VOUT_OUTMEM_SLEEP );
 232         }
 233         CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_pic );
 234         CopyPicture( p_vout, p_outpic, p_pic );
 235         vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 236         return;
 237     }
 238
 239     /* Get a new picture */
 240     RenderBlur( p_vout, p_vout->p_sys->p_lastpic, p_pic, p_outpic );
 241     vout_DestroyPicture( p_vout, p_vout->p_sys->p_lastpic );
 242
 243
 244     /* Get a new picture */
 245     while( ( p_vout->p_sys->p_lastpic =
 246              vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 247            == NULL )
 248     {
 249         if( p_vout->b_die || p_vout->b_error )
 250         {
 251             return;
 252         }
 253         msleep( VOUT_OUTMEM_SLEEP );
 254     }
 255     CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_outpic );
 256     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 257
 258 }
 259
 260 static void CopyPicture( vout_thread_t *p_vout,
 261                          picture_t *p_dest, picture_t *p_source)
 262 {
 263     int i_plane;
 264
 265     for( i_plane = 0 ; i_plane < p_dest->i_planes ; i_plane++ )
 266     {
 267         u8 *p_in, *p_out;
 268
 269         p_in = p_source->p[i_plane].p_pixels;
 270
 271         p_out = p_dest->p[i_plane].p_pixels;
 272         p_vout->p_vlc->pf_memcpy( p_out, p_in,
 273                                   p_dest->p[i_plane].i_pitch *
 274                                   p_dest->p[i_plane].i_lines);
 275     }
 276 }
 277 /*****************************************************************************
 278  * RenderBob: renders a bob picture
 279  *****************************************************************************/
 280 static void RenderBlur( vout_thread_t *p_vout, picture_t *p_oldpic,
 281                         picture_t *p_newpic, picture_t *p_outpic )
 282 {
 283     int i_plane;
 284     int i_oldfactor = p_vout->p_sys->i_factor;
 285     int i_newfactor = 128 - p_vout->p_sys->i_factor;
 286     for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
 287     {
 288         u8 *p_old, *p_new, *p_out, *p_out_end;
 289         p_out = p_outpic->p[i_plane].p_pixels;
 290         p_new = p_newpic->p[i_plane].p_pixels;
 291         p_old = p_oldpic->p[i_plane].p_pixels;
 292         p_out_end = p_out + p_outpic->p[i_plane].i_pitch *
 293             p_outpic->p[i_plane].i_lines;
 294         while ( p_out < p_out_end +4 )
 295         {
 296             *p_out++ = (((*p_old++) * i_oldfactor) + ((*p_new++) * i_newfactor))>>7;
 297 //            *p_out++ = (*p_old++ >> 1) + (*p_new++ >> 1);
 298         }
 299     }
 300 }