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  * $Id$
   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 (1-127)")
  55 #define MODE_LONGTEXT N_("The degree of blurring from 1 to 127.")
  56
  57 vlc_module_begin();
  58     set_description( _("Motion blur filter") );
  59     set_capability( "video filter", 0 );
  60
  61     add_integer_with_range( "blur-factor", 80, 1, 127, NULL,
  62         MODE_TEXT, MODE_LONGTEXT, VLC_FALSE );
  63
  64     set_callbacks( Create, Destroy );
  65 vlc_module_end();
  66
  67 /*****************************************************************************
  68  * vout_sys_t: Deinterlace video output method descriptor
  69  *****************************************************************************
  70  * This structure is part of the video output thread descriptor.
  71  * It describes the Deinterlace specific properties of an output thread.
  72  *****************************************************************************/
  73 struct vout_sys_t
  74 {
  75     int        i_factor;        /* Deinterlace mode */
  76     vlc_bool_t b_double_rate; /* Shall we double the framerate? */
  77
  78     mtime_t    last_date;
  79     mtime_t    next_date;
  80
  81     vout_thread_t *p_vout;
  82     picture_t *p_lastpic;
  83 };
  84
  85 /*****************************************************************************
  86  * Control: control facility for the vout (forwards to child vout)
  87  *****************************************************************************/
  88 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
  89 {
  90     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
  91 }
  92
  93 /*****************************************************************************
  94  * Create: allocates Deinterlace video thread output method
  95  *****************************************************************************
  96  * This function allocates and initializes a Deinterlace vout method.
  97  *****************************************************************************/
  98 static int Create( vlc_object_t *p_this )
  99 {
 100     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 101
 102     /* Allocate structure */
 103     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 104     if( p_vout->p_sys == NULL )
 105     {
 106         msg_Err( p_vout, "out of memory" );
 107         return VLC_ENOMEM;
 108     }
 109
 110     p_vout->pf_init = Init;
 111     p_vout->pf_end = End;
 112     p_vout->pf_manage = NULL;
 113     p_vout->pf_render = Render;
 114     p_vout->pf_display = NULL;
 115     p_vout->pf_control = Control;
 116
 117     p_vout->p_sys->i_factor = config_GetInt( p_vout, "blur-factor" );
 118     p_vout->p_sys->b_double_rate = 0;
 119     p_vout->p_sys->last_date = 0;
 120     p_vout->p_sys->p_lastpic = NULL;
 121
 122     return VLC_SUCCESS;
 123 }
 124
 125 /*****************************************************************************
 126  * Init: initialize Deinterlace video thread output method
 127  *****************************************************************************/
 128 static int Init( vout_thread_t *p_vout )
 129 {
 130     int i_index;
 131     picture_t *p_pic;
 132
 133     I_OUTPUTPICTURES = 0;
 134
 135     /* Initialize the output structure, full of directbuffers since we want
 136      * the decoder to output directly to our structures. */
 137     switch( p_vout->render.i_chroma )
 138     {
 139         case VLC_FOURCC('I','4','2','0'):
 140         case VLC_FOURCC('I','Y','U','V'):
 141         case VLC_FOURCC('Y','V','1','2'):
 142         case VLC_FOURCC('I','4','2','2'):
 143             p_vout->output.i_chroma = p_vout->render.i_chroma;
 144             p_vout->output.i_width  = p_vout->render.i_width;
 145             p_vout->output.i_height = p_vout->render.i_height;
 146             p_vout->output.i_aspect = p_vout->render.i_aspect;
 147             break;
 148
 149         default:
 150             return VLC_EGENERIC; /* unknown chroma */
 151             break;
 152     }
 153
 154     msg_Dbg( p_vout, "spawning the real video output" );
 155
 156     switch( p_vout->render.i_chroma )
 157     {
 158     case VLC_FOURCC('I','4','2','0'):
 159     case VLC_FOURCC('I','Y','U','V'):
 160     case VLC_FOURCC('Y','V','1','2'):
 161         p_vout->p_sys->p_vout = vout_Create( p_vout,
 162                            p_vout->output.i_width, p_vout->output.i_height,
 163                            p_vout->output.i_chroma, p_vout->output.i_aspect );
 164         break;
 165     default:
 166         break;
 167     }
 168
 169     /* Everything failed */
 170     if( p_vout->p_sys->p_vout == NULL )
 171     {
 172         msg_Err( p_vout, "cannot open vout, aborting" );
 173
 174         return VLC_EGENERIC;
 175     }
 176
 177     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 178
 179     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 180
 181     ADD_PARENT_CALLBACKS( SendEventsToChild );
 182
 183     return VLC_SUCCESS;
 184 }
 185
 186 /*****************************************************************************
 187  * End: terminate Deinterlace video thread output method
 188  *****************************************************************************/
 189 static void End( vout_thread_t *p_vout )
 190 {
 191     int i_index;
 192
 193     /* Free the fake output buffers we allocated */
 194     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 195     {
 196         i_index--;
 197         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 198     }
 199 }
 200
 201 /*****************************************************************************
 202  * Destroy: destroy Deinterlace video thread output method
 203  *****************************************************************************
 204  * Terminate an output method created by DeinterlaceCreateOutputMethod
 205  *****************************************************************************/
 206 static void Destroy( vlc_object_t *p_this )
 207 {
 208     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 209
 210     DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 211     vlc_object_detach( p_vout->p_sys->p_vout );
 212     vout_Destroy( p_vout->p_sys->p_vout );
 213
 214     DEL_PARENT_CALLBACKS( SendEventsToChild );
 215
 216     free( p_vout->p_sys );
 217 }
 218
 219 /*****************************************************************************
 220  * Render: displays previously rendered output
 221  *****************************************************************************
 222  * This function send the currently rendered image to Deinterlace image,
 223  * waits until it is displayed and switch the two rendering buffers, preparing
 224  * next frame.
 225  *****************************************************************************/
 226 static void Render ( vout_thread_t *p_vout, picture_t *p_pic )
 227 {
 228     picture_t * p_outpic;
 229     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 230            == NULL )
 231     {
 232         if( p_vout->b_die || p_vout->b_error )
 233         {
 234             return;
 235         }
 236         msleep( VOUT_OUTMEM_SLEEP );
 237     }
 238     vout_DatePicture( p_vout, p_outpic, p_pic->date );
 239
 240     if ( p_vout->p_sys->p_lastpic == NULL )
 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_pic );
 254         CopyPicture( p_vout, p_outpic, p_pic );
 255         vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 256         return;
 257     }
 258
 259     /* Get a new picture */
 260     RenderBlur( p_vout, p_vout->p_sys->p_lastpic, p_pic, p_outpic );
 261     vout_DestroyPicture( p_vout, p_vout->p_sys->p_lastpic );
 262
 263
 264     /* Get a new picture */
 265     while( ( p_vout->p_sys->p_lastpic =
 266              vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 267            == NULL )
 268     {
 269         if( p_vout->b_die || p_vout->b_error )
 270         {
 271             return;
 272         }
 273         msleep( VOUT_OUTMEM_SLEEP );
 274     }
 275     CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_outpic );
 276     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 277 }
 278
 279 /* FIXME: this is a verbatim copy from src/video_output/vout_pictures.c */
 280 /* XXX: the order is fucked up!! */
 281 static void CopyPicture( vout_thread_t * p_vout,
 282                          picture_t *p_dest, picture_t *p_src )
 283 {
 284     int i;
 285
 286     for( i = 0; i < p_src->i_planes ; i++ )
 287     {
 288         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
 289         {
 290             /* There are margins, but with the same width : perfect ! */
 291             p_vout->p_vlc->pf_memcpy(
 292                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
 293                          p_src->p[i].i_pitch * p_src->p[i].i_lines );
 294         }
 295         else
 296         {
 297             /* We need to proceed line by line */
 298             uint8_t *p_in = p_src->p[i].p_pixels;
 299             uint8_t *p_out = p_dest->p[i].p_pixels;
 300             int i_line;
 301
 302             for( i_line = p_src->p[i].i_lines; i_line--; )
 303             {
 304                 p_vout->p_vlc->pf_memcpy( p_out, p_in,
 305                                           p_src->p[i].i_visible_pitch );
 306                 p_in += p_src->p[i].i_pitch;
 307                 p_out += p_dest->p[i].i_pitch;
 308             }
 309         }
 310     }
 311 }
 312
 313 /*****************************************************************************
 314  * RenderBlur: renders a blurred picture
 315  *****************************************************************************/
 316 static void RenderBlur( vout_thread_t *p_vout, picture_t *p_oldpic,
 317                         picture_t *p_newpic, picture_t *p_outpic )
 318 {
 319     int i_plane;
 320     int i_oldfactor = p_vout->p_sys->i_factor;
 321     int i_newfactor = 128 - p_vout->p_sys->i_factor;
 322     for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
 323     {
 324         uint8_t *p_old, *p_new, *p_out, *p_out_end, *p_out_line_end;
 325         p_out = p_outpic->p[i_plane].p_pixels;
 326         p_new = p_newpic->p[i_plane].p_pixels;
 327         p_old = p_oldpic->p[i_plane].p_pixels;
 328         p_out_end = p_out + p_outpic->p[i_plane].i_pitch *
 329                              p_outpic->p[i_plane].i_lines;
 330         while ( p_out < p_out_end )
 331         {
 332             p_out_line_end = p_out + p_outpic->p[i_plane].i_visible_pitch;
 333
 334             while ( p_out < p_out_line_end )
 335             {
 336                 *p_out++ = (((*p_old++) * i_oldfactor) +
 337                             ((*p_new++) * i_newfactor)) >> 7;
 338
 339 //                *p_out++ = (*p_old++ >> 1) + (*p_new++ >> 1);
 340             }
 341
 342             p_old += p_oldpic->p[i_plane].i_pitch
 343                       - p_oldpic->p[i_plane].i_visible_pitch;
 344             p_new += p_newpic->p[i_plane].i_pitch
 345                       - p_newpic->p[i_plane].i_visible_pitch;
 346             p_out += p_outpic->p[i_plane].i_pitch
 347                       - p_outpic->p[i_plane].i_visible_pitch;
 348         }
 349     }
 350 }
 351
 352 /*****************************************************************************
 353  * SendEvents: forward mouse and keyboard events to the parent p_vout
 354  *****************************************************************************/
 355 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 356                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 357 {
 358     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 359
 360     return VLC_SUCCESS;
 361 }
 362
 363 /*****************************************************************************
 364  * SendEventsToChild: forward events to the child/children vout
 365  *****************************************************************************/
 366 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 367                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 368 {
 369     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 370     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 371     return VLC_SUCCESS;
 372 }