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 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Sigmund Augdal Helberg <dnumgis@videolan.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 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_shortname( _("Motion blur") );
  59     set_description( _("Motion blur filter") );
  60     set_capability( "video filter", 0 );
  61     set_category( CAT_VIDEO );
  62     set_subcategory( SUBCAT_VIDEO_VFILTER );
  63
  64     add_integer_with_range( "blur-factor", 80, 1, 127, NULL,
  65         MODE_TEXT, MODE_LONGTEXT, VLC_FALSE );
  66
  67     set_callbacks( Create, Destroy );
  68 vlc_module_end();
  69
  70 /*****************************************************************************
  71  * vout_sys_t: Deinterlace video output method descriptor
  72  *****************************************************************************
  73  * This structure is part of the video output thread descriptor.
  74  * It describes the Deinterlace specific properties of an output thread.
  75  *****************************************************************************/
  76 struct vout_sys_t
  77 {
  78     int        i_factor;        /* Deinterlace mode */
  79     vlc_bool_t b_double_rate; /* Shall we double the framerate? */
  80
  81     mtime_t    last_date;
  82     mtime_t    next_date;
  83
  84     vout_thread_t *p_vout;
  85     picture_t *p_lastpic;
  86 };
  87
  88 /*****************************************************************************
  89  * Control: control facility for the vout (forwards to child vout)
  90  *****************************************************************************/
  91 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
  92 {
  93     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
  94 }
  95
  96 /*****************************************************************************
  97  * Create: allocates Deinterlace video thread output method
  98  *****************************************************************************
  99  * This function allocates and initializes a Deinterlace vout method.
 100  *****************************************************************************/
 101 static int Create( vlc_object_t *p_this )
 102 {
 103     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 104
 105     /* Allocate structure */
 106     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 107     if( p_vout->p_sys == NULL )
 108     {
 109         msg_Err( p_vout, "out of memory" );
 110         return VLC_ENOMEM;
 111     }
 112
 113     p_vout->pf_init = Init;
 114     p_vout->pf_end = End;
 115     p_vout->pf_manage = NULL;
 116     p_vout->pf_render = Render;
 117     p_vout->pf_display = NULL;
 118     p_vout->pf_control = Control;
 119
 120     p_vout->p_sys->i_factor = config_GetInt( p_vout, "blur-factor" );
 121     p_vout->p_sys->b_double_rate = 0;
 122     p_vout->p_sys->last_date = 0;
 123     p_vout->p_sys->p_lastpic = NULL;
 124
 125     return VLC_SUCCESS;
 126 }
 127
 128 /*****************************************************************************
 129  * Init: initialize Deinterlace video thread output method
 130  *****************************************************************************/
 131 static int Init( vout_thread_t *p_vout )
 132 {
 133     int i_index;
 134     picture_t *p_pic;
 135     video_format_t fmt = {0};
 136
 137     I_OUTPUTPICTURES = 0;
 138
 139     /* Initialize the output structure, full of directbuffers since we want
 140      * the decoder to output directly to our structures. */
 141     switch( p_vout->render.i_chroma )
 142     {
 143         case VLC_FOURCC('I','4','2','0'):
 144         case VLC_FOURCC('I','Y','U','V'):
 145         case VLC_FOURCC('Y','V','1','2'):
 146         case VLC_FOURCC('I','4','2','2'):
 147             p_vout->output.i_chroma = p_vout->render.i_chroma;
 148             p_vout->output.i_width  = p_vout->render.i_width;
 149             p_vout->output.i_height = p_vout->render.i_height;
 150             p_vout->output.i_aspect = p_vout->render.i_aspect;
 151             p_vout->fmt_out = p_vout->fmt_in;
 152             fmt = p_vout->fmt_out;
 153             break;
 154
 155         default:
 156             return VLC_EGENERIC; /* unknown chroma */
 157             break;
 158     }
 159
 160     msg_Dbg( p_vout, "spawning the real video output" );
 161
 162     switch( p_vout->render.i_chroma )
 163     {
 164     case VLC_FOURCC('I','4','2','0'):
 165     case VLC_FOURCC('I','Y','U','V'):
 166     case VLC_FOURCC('Y','V','1','2'):
 167         p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 168         break;
 169     default:
 170         break;
 171     }
 172
 173     /* Everything failed */
 174     if( p_vout->p_sys->p_vout == NULL )
 175     {
 176         msg_Err( p_vout, "cannot open vout, aborting" );
 177
 178         return VLC_EGENERIC;
 179     }
 180
 181     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 182
 183     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 184
 185     ADD_PARENT_CALLBACKS( SendEventsToChild );
 186
 187     return VLC_SUCCESS;
 188 }
 189
 190 /*****************************************************************************
 191  * End: terminate Deinterlace video thread output method
 192  *****************************************************************************/
 193 static void End( vout_thread_t *p_vout )
 194 {
 195     int i_index;
 196
 197     /* Free the fake output buffers we allocated */
 198     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 199     {
 200         i_index--;
 201         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 202     }
 203 }
 204
 205 /*****************************************************************************
 206  * Destroy: destroy Deinterlace video thread output method
 207  *****************************************************************************
 208  * Terminate an output method created by DeinterlaceCreateOutputMethod
 209  *****************************************************************************/
 210 static void Destroy( vlc_object_t *p_this )
 211 {
 212     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 213
 214     if( p_vout->p_sys->p_vout )
 215     {
 216         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 217         vlc_object_detach( p_vout->p_sys->p_vout );
 218         vout_Destroy( p_vout->p_sys->p_vout );
 219     }
 220
 221     DEL_PARENT_CALLBACKS( SendEventsToChild );
 222
 223     free( p_vout->p_sys );
 224 }
 225
 226 /*****************************************************************************
 227  * Render: displays previously rendered output
 228  *****************************************************************************
 229  * This function send the currently rendered image to Deinterlace image,
 230  * waits until it is displayed and switch the two rendering buffers, preparing
 231  * next frame.
 232  *****************************************************************************/
 233 static void Render ( vout_thread_t *p_vout, picture_t *p_pic )
 234 {
 235     picture_t * p_outpic;
 236     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 237            == NULL )
 238     {
 239         if( p_vout->b_die || p_vout->b_error )
 240         {
 241             return;
 242         }
 243         msleep( VOUT_OUTMEM_SLEEP );
 244     }
 245     vout_DatePicture( p_vout, p_outpic, p_pic->date );
 246
 247     if ( p_vout->p_sys->p_lastpic == NULL )
 248     {
 249         /* Get a new picture */
 250         while( ( p_vout->p_sys->p_lastpic =
 251                  vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 252                == NULL )
 253         {
 254             if( p_vout->b_die || p_vout->b_error )
 255             {
 256                 return;
 257             }
 258             msleep( VOUT_OUTMEM_SLEEP );
 259         }
 260         CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_pic );
 261         CopyPicture( p_vout, p_outpic, p_pic );
 262         vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 263         return;
 264     }
 265
 266     /* Get a new picture */
 267     RenderBlur( p_vout, p_vout->p_sys->p_lastpic, p_pic, p_outpic );
 268     vout_DestroyPicture( p_vout, p_vout->p_sys->p_lastpic );
 269
 270
 271     /* Get a new picture */
 272     while( ( p_vout->p_sys->p_lastpic =
 273              vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 274            == NULL )
 275     {
 276         if( p_vout->b_die || p_vout->b_error )
 277         {
 278             return;
 279         }
 280         msleep( VOUT_OUTMEM_SLEEP );
 281     }
 282     CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_outpic );
 283     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 284 }
 285
 286 /* FIXME: this is a verbatim copy from src/video_output/vout_pictures.c */
 287 /* XXX: the order is fucked up!! */
 288 static void CopyPicture( vout_thread_t * p_vout,
 289                          picture_t *p_dest, picture_t *p_src )
 290 {
 291     int i;
 292
 293     for( i = 0; i < p_src->i_planes ; i++ )
 294     {
 295         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
 296         {
 297             /* There are margins, but with the same width : perfect ! */
 298             p_vout->p_libvlc->pf_memcpy(
 299                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
 300                          p_src->p[i].i_pitch * p_src->p[i].i_visible_lines );
 301         }
 302         else
 303         {
 304             /* We need to proceed line by line */
 305             uint8_t *p_in = p_src->p[i].p_pixels;
 306             uint8_t *p_out = p_dest->p[i].p_pixels;
 307             int i_line;
 308
 309             for( i_line = p_src->p[i].i_visible_lines; i_line--; )
 310             {
 311                 p_vout->p_libvlc->pf_memcpy( p_out, p_in,
 312                                           p_src->p[i].i_visible_pitch );
 313                 p_in += p_src->p[i].i_pitch;
 314                 p_out += p_dest->p[i].i_pitch;
 315             }
 316         }
 317     }
 318 }
 319
 320 /*****************************************************************************
 321  * RenderBlur: renders a blurred picture
 322  *****************************************************************************/
 323 static void RenderBlur( vout_thread_t *p_vout, picture_t *p_oldpic,
 324                         picture_t *p_newpic, picture_t *p_outpic )
 325 {
 326     int i_plane;
 327     int i_oldfactor = p_vout->p_sys->i_factor;
 328     int i_newfactor = 128 - p_vout->p_sys->i_factor;
 329     for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
 330     {
 331         uint8_t *p_old, *p_new, *p_out, *p_out_end, *p_out_line_end;
 332         p_out = p_outpic->p[i_plane].p_pixels;
 333         p_new = p_newpic->p[i_plane].p_pixels;
 334         p_old = p_oldpic->p[i_plane].p_pixels;
 335         p_out_end = p_out + p_outpic->p[i_plane].i_pitch *
 336                              p_outpic->p[i_plane].i_visible_lines;
 337         while ( p_out < p_out_end )
 338         {
 339             p_out_line_end = p_out + p_outpic->p[i_plane].i_visible_pitch;
 340
 341             while ( p_out < p_out_line_end )
 342             {
 343                 *p_out++ = (((*p_old++) * i_oldfactor) +
 344                             ((*p_new++) * i_newfactor)) >> 7;
 345
 346 //                *p_out++ = (*p_old++ >> 1) + (*p_new++ >> 1);
 347             }
 348
 349             p_old += p_oldpic->p[i_plane].i_pitch
 350                       - p_oldpic->p[i_plane].i_visible_pitch;
 351             p_new += p_newpic->p[i_plane].i_pitch
 352                       - p_newpic->p[i_plane].i_visible_pitch;
 353             p_out += p_outpic->p[i_plane].i_pitch
 354                       - p_outpic->p[i_plane].i_visible_pitch;
 355         }
 356     }
 357 }
 358
 359 /*****************************************************************************
 360  * SendEvents: forward mouse and keyboard events to the parent p_vout
 361  *****************************************************************************/
 362 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 363                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 364 {
 365     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 366
 367     return VLC_SUCCESS;
 368 }
 369
 370 /*****************************************************************************
 371  * SendEventsToChild: forward events to the child/children vout
 372  *****************************************************************************/
 373 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 374                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 375 {
 376     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 377     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 378     return VLC_SUCCESS;
 379 }