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, 2002, 2003 VideoLAN
   5  * $Id: motionblur.c,v 1.6 2003/01/17 16:18:03 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 static int  SendEvents( vlc_object_t *, char const *,
  49                         vlc_value_t, vlc_value_t, void * );
  50
  51 /*****************************************************************************
  52  * Module descriptor
  53  *****************************************************************************/
  54 #define MODE_TEXT N_("Blur factor")
  55 #define MODE_LONGTEXT N_("The degree of blurring from 1 to 127")
  56
  57 vlc_module_begin();
  58     add_category_hint( N_("Miscellaneous"), NULL );
  59     add_integer( "blur-factor", 80, NULL, MODE_TEXT, MODE_LONGTEXT );
  60     set_description( _("Motion blur filter") );
  61     set_capability( "video filter", 0 );
  62     set_callbacks( Create, Destroy );
  63 vlc_module_end();
  64
  65 /*****************************************************************************
  66  * vout_sys_t: Deinterlace video output method descriptor
  67  *****************************************************************************
  68  * This structure is part of the video output thread descriptor.
  69  * It describes the Deinterlace specific properties of an output thread.
  70  *****************************************************************************/
  71 struct vout_sys_t
  72 {
  73     int        i_factor;        /* Deinterlace mode */
  74     vlc_bool_t b_double_rate; /* Shall we double the framerate? */
  75
  76     mtime_t    last_date;
  77     mtime_t    next_date;
  78
  79     vout_thread_t *p_vout;
  80     picture_t *p_lastpic;
  81 };
  82
  83 /*****************************************************************************
  84  * Create: allocates Deinterlace video thread output method
  85  *****************************************************************************
  86  * This function allocates and initializes a Deinterlace vout method.
  87  *****************************************************************************/
  88 static int Create( vlc_object_t *p_this )
  89 {
  90     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  91
  92     /* Allocate structure */
  93     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  94     if( p_vout->p_sys == NULL )
  95     {
  96         msg_Err( p_vout, "out of memory" );
  97         return VLC_ENOMEM;
  98     }
  99
 100     p_vout->pf_init = Init;
 101     p_vout->pf_end = End;
 102     p_vout->pf_manage = NULL;
 103     p_vout->pf_render = Render;
 104     p_vout->pf_display = NULL;
 105
 106     p_vout->p_sys->i_factor = config_GetInt( p_vout, "blur-factor" );
 107     p_vout->p_sys->b_double_rate = 0;
 108     p_vout->p_sys->last_date = 0;
 109     p_vout->p_sys->p_lastpic = NULL;
 110
 111     return VLC_SUCCESS;
 112 }
 113
 114 /*****************************************************************************
 115  * Init: initialize Deinterlace video thread output method
 116  *****************************************************************************/
 117 static int Init( vout_thread_t *p_vout )
 118 {
 119     int i_index;
 120     picture_t *p_pic;
 121
 122     I_OUTPUTPICTURES = 0;
 123
 124     /* Initialize the output structure, full of directbuffers since we want
 125      * the decoder to output directly to our structures. */
 126     switch( p_vout->render.i_chroma )
 127     {
 128         case VLC_FOURCC('I','4','2','0'):
 129         case VLC_FOURCC('I','Y','U','V'):
 130         case VLC_FOURCC('Y','V','1','2'):
 131         case VLC_FOURCC('I','4','2','2'):
 132             p_vout->output.i_chroma = p_vout->render.i_chroma;
 133             p_vout->output.i_width  = p_vout->render.i_width;
 134             p_vout->output.i_height = p_vout->render.i_height;
 135             p_vout->output.i_aspect = p_vout->render.i_aspect;
 136             break;
 137
 138         default:
 139             return VLC_EGENERIC; /* unknown chroma */
 140             break;
 141     }
 142
 143     msg_Dbg( p_vout, "spawning the real video output" );
 144
 145     switch( p_vout->render.i_chroma )
 146     {
 147     case VLC_FOURCC('I','4','2','0'):
 148     case VLC_FOURCC('I','Y','U','V'):
 149     case VLC_FOURCC('Y','V','1','2'):
 150         p_vout->p_sys->p_vout = vout_Create( p_vout,
 151                            p_vout->output.i_width, p_vout->output.i_height,
 152                            p_vout->output.i_chroma, p_vout->output.i_aspect );
 153         break;
 154     default:
 155         break;
 156     }
 157
 158     /* Everything failed */
 159     if( p_vout->p_sys->p_vout == NULL )
 160     {
 161         msg_Err( p_vout, "cannot open vout, aborting" );
 162
 163         return VLC_EGENERIC;
 164     }
 165
 166     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 167
 168     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 169
 170     return VLC_SUCCESS;
 171 }
 172
 173 /*****************************************************************************
 174  * End: terminate Deinterlace video thread output method
 175  *****************************************************************************/
 176 static void End( vout_thread_t *p_vout )
 177 {
 178     int i_index;
 179
 180     /* Free the fake output buffers we allocated */
 181     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 182     {
 183         i_index--;
 184         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 185     }
 186 }
 187
 188 /*****************************************************************************
 189  * Destroy: destroy Deinterlace video thread output method
 190  *****************************************************************************
 191  * Terminate an output method created by DeinterlaceCreateOutputMethod
 192  *****************************************************************************/
 193 static void Destroy( vlc_object_t *p_this )
 194 {
 195     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 196
 197     DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 198     vout_Destroy( p_vout->p_sys->p_vout );
 199
 200     free( p_vout->p_sys );
 201 }
 202
 203 /*****************************************************************************
 204  * Render: displays previously rendered output
 205  *****************************************************************************
 206  * This function send the currently rendered image to Deinterlace image,
 207  * waits until it is displayed and switch the two rendering buffers, preparing
 208  * next frame.
 209  *****************************************************************************/
 210 static void Render ( vout_thread_t *p_vout, picture_t *p_pic )
 211 {
 212     picture_t * p_outpic;
 213     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 214            == NULL )
 215     {
 216         if( p_vout->b_die || p_vout->b_error )
 217         {
 218             return;
 219         }
 220         msleep( VOUT_OUTMEM_SLEEP );
 221     }
 222     vout_DatePicture( p_vout, p_outpic, p_pic->date );
 223
 224     if ( p_vout->p_sys->p_lastpic == NULL )
 225     {
 226         /* Get a new picture */
 227         while( ( p_vout->p_sys->p_lastpic =
 228                  vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 229                == NULL )
 230         {
 231             if( p_vout->b_die || p_vout->b_error )
 232             {
 233                 return;
 234             }
 235             msleep( VOUT_OUTMEM_SLEEP );
 236         }
 237         CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_pic );
 238         CopyPicture( p_vout, p_outpic, p_pic );
 239         vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 240         return;
 241     }
 242
 243     /* Get a new picture */
 244     RenderBlur( p_vout, p_vout->p_sys->p_lastpic, p_pic, p_outpic );
 245     vout_DestroyPicture( p_vout, p_vout->p_sys->p_lastpic );
 246
 247
 248     /* Get a new picture */
 249     while( ( p_vout->p_sys->p_lastpic =
 250              vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 251            == NULL )
 252     {
 253         if( p_vout->b_die || p_vout->b_error )
 254         {
 255             return;
 256         }
 257         msleep( VOUT_OUTMEM_SLEEP );
 258     }
 259     CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_outpic );
 260     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 261 }
 262
 263 /* FIXME: this is a verbatim copy from src/video_output/vout_pictures.c */
 264 /* XXX: the order is fucked up!! */
 265 static void CopyPicture( vout_thread_t * p_vout,
 266                          picture_t *p_dest, picture_t *p_src )
 267 {
 268     int i;
 269
 270     for( i = 0; i < p_src->i_planes ; i++ )
 271     {
 272         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
 273         {
 274             /* There are margins, but with the same width : perfect ! */
 275             p_vout->p_vlc->pf_memcpy(
 276                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
 277                          p_src->p[i].i_pitch * p_src->p[i].i_lines );
 278         }
 279         else
 280         {
 281             /* We need to proceed line by line */
 282             uint8_t *p_in = p_src->p[i].p_pixels;
 283             uint8_t *p_out = p_dest->p[i].p_pixels;
 284             int i_line;
 285
 286             for( i_line = p_src->p[i].i_lines; i_line--; )
 287             {
 288                 p_vout->p_vlc->pf_memcpy( p_out, p_in,
 289                                           p_src->p[i].i_visible_pitch );
 290                 p_in += p_src->p[i].i_pitch;
 291                 p_out += p_dest->p[i].i_pitch;
 292             }
 293         }
 294     }
 295 }
 296
 297 /*****************************************************************************
 298  * RenderBlur: renders a blurred picture
 299  *****************************************************************************/
 300 static void RenderBlur( vout_thread_t *p_vout, picture_t *p_oldpic,
 301                         picture_t *p_newpic, picture_t *p_outpic )
 302 {
 303     int i_plane;
 304     int i_oldfactor = p_vout->p_sys->i_factor;
 305     int i_newfactor = 128 - p_vout->p_sys->i_factor;
 306     for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
 307     {
 308         uint8_t *p_old, *p_new, *p_out, *p_out_end, *p_out_line_end;
 309         p_out = p_outpic->p[i_plane].p_pixels;
 310         p_new = p_newpic->p[i_plane].p_pixels;
 311         p_old = p_oldpic->p[i_plane].p_pixels;
 312         p_out_end = p_out + p_outpic->p[i_plane].i_pitch *
 313                              p_outpic->p[i_plane].i_lines;
 314         while ( p_out < p_out_end )
 315         {
 316             p_out_line_end = p_out + p_outpic->p[i_plane].i_visible_pitch;
 317
 318             while ( p_out < p_out_line_end )
 319             {
 320                 *p_out++ = (((*p_old++) * i_oldfactor) +
 321                             ((*p_new++) * i_newfactor)) >> 7;
 322
 323 //                *p_out++ = (*p_old++ >> 1) + (*p_new++ >> 1);
 324             }
 325
 326             p_old += p_oldpic->p[i_plane].i_pitch
 327                       - p_oldpic->p[i_plane].i_visible_pitch;
 328             p_new += p_newpic->p[i_plane].i_pitch
 329                       - p_newpic->p[i_plane].i_visible_pitch;
 330             p_out += p_outpic->p[i_plane].i_pitch
 331                       - p_outpic->p[i_plane].i_visible_pitch;
 332         }
 333     }
 334 }
 335
 336 /*****************************************************************************
 337  * SendEvents: forward mouse and keyboard events to the parent p_vout
 338  *****************************************************************************/
 339 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 340                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 341 {
 342     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 343
 344     return VLC_SUCCESS;
 345 }
 346