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 <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_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             break;
 152
 153         default:
 154             return VLC_EGENERIC; /* unknown chroma */
 155             break;
 156     }
 157
 158     msg_Dbg( p_vout, "spawning the real video output" );
 159
 160     fmt.i_width = fmt.i_visible_width = p_vout->output.i_width;
 161     fmt.i_height = fmt.i_visible_height = p_vout->output.i_height;
 162     fmt.i_x_offset = fmt.i_y_offset = 0;
 163     fmt.i_chroma = p_vout->output.i_chroma;
 164     fmt.i_aspect = p_vout->output.i_aspect;
 165     fmt.i_sar_num = p_vout->output.i_aspect * fmt.i_height / fmt.i_width;
 166     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 167
 168     switch( p_vout->render.i_chroma )
 169     {
 170     case VLC_FOURCC('I','4','2','0'):
 171     case VLC_FOURCC('I','Y','U','V'):
 172     case VLC_FOURCC('Y','V','1','2'):
 173         p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 174         break;
 175     default:
 176         break;
 177     }
 178
 179     /* Everything failed */
 180     if( p_vout->p_sys->p_vout == NULL )
 181     {
 182         msg_Err( p_vout, "cannot open vout, aborting" );
 183
 184         return VLC_EGENERIC;
 185     }
 186
 187     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 188
 189     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 190
 191     ADD_PARENT_CALLBACKS( SendEventsToChild );
 192
 193     return VLC_SUCCESS;
 194 }
 195
 196 /*****************************************************************************
 197  * End: terminate Deinterlace video thread output method
 198  *****************************************************************************/
 199 static void End( vout_thread_t *p_vout )
 200 {
 201     int i_index;
 202
 203     /* Free the fake output buffers we allocated */
 204     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 205     {
 206         i_index--;
 207         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 208     }
 209 }
 210
 211 /*****************************************************************************
 212  * Destroy: destroy Deinterlace video thread output method
 213  *****************************************************************************
 214  * Terminate an output method created by DeinterlaceCreateOutputMethod
 215  *****************************************************************************/
 216 static void Destroy( vlc_object_t *p_this )
 217 {
 218     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 219
 220     if( p_vout->p_sys->p_vout )
 221     {
 222         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 223         vlc_object_detach( p_vout->p_sys->p_vout );
 224         vout_Destroy( p_vout->p_sys->p_vout );
 225     }
 226
 227     DEL_PARENT_CALLBACKS( SendEventsToChild );
 228
 229     free( p_vout->p_sys );
 230 }
 231
 232 /*****************************************************************************
 233  * Render: displays previously rendered output
 234  *****************************************************************************
 235  * This function send the currently rendered image to Deinterlace image,
 236  * waits until it is displayed and switch the two rendering buffers, preparing
 237  * next frame.
 238  *****************************************************************************/
 239 static void Render ( vout_thread_t *p_vout, picture_t *p_pic )
 240 {
 241     picture_t * p_outpic;
 242     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 243            == NULL )
 244     {
 245         if( p_vout->b_die || p_vout->b_error )
 246         {
 247             return;
 248         }
 249         msleep( VOUT_OUTMEM_SLEEP );
 250     }
 251     vout_DatePicture( p_vout, p_outpic, p_pic->date );
 252
 253     if ( p_vout->p_sys->p_lastpic == NULL )
 254     {
 255         /* Get a new picture */
 256         while( ( p_vout->p_sys->p_lastpic =
 257                  vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 258                == NULL )
 259         {
 260             if( p_vout->b_die || p_vout->b_error )
 261             {
 262                 return;
 263             }
 264             msleep( VOUT_OUTMEM_SLEEP );
 265         }
 266         CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_pic );
 267         CopyPicture( p_vout, p_outpic, p_pic );
 268         vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 269         return;
 270     }
 271
 272     /* Get a new picture */
 273     RenderBlur( p_vout, p_vout->p_sys->p_lastpic, p_pic, p_outpic );
 274     vout_DestroyPicture( p_vout, p_vout->p_sys->p_lastpic );
 275
 276
 277     /* Get a new picture */
 278     while( ( p_vout->p_sys->p_lastpic =
 279              vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 280            == NULL )
 281     {
 282         if( p_vout->b_die || p_vout->b_error )
 283         {
 284             return;
 285         }
 286         msleep( VOUT_OUTMEM_SLEEP );
 287     }
 288     CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_outpic );
 289     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 290 }
 291
 292 /* FIXME: this is a verbatim copy from src/video_output/vout_pictures.c */
 293 /* XXX: the order is fucked up!! */
 294 static void CopyPicture( vout_thread_t * p_vout,
 295                          picture_t *p_dest, picture_t *p_src )
 296 {
 297     int i;
 298
 299     for( i = 0; i < p_src->i_planes ; i++ )
 300     {
 301         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
 302         {
 303             /* There are margins, but with the same width : perfect ! */
 304             p_vout->p_vlc->pf_memcpy(
 305                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
 306                          p_src->p[i].i_pitch * p_src->p[i].i_visible_lines );
 307         }
 308         else
 309         {
 310             /* We need to proceed line by line */
 311             uint8_t *p_in = p_src->p[i].p_pixels;
 312             uint8_t *p_out = p_dest->p[i].p_pixels;
 313             int i_line;
 314
 315             for( i_line = p_src->p[i].i_visible_lines; i_line--; )
 316             {
 317                 p_vout->p_vlc->pf_memcpy( p_out, p_in,
 318                                           p_src->p[i].i_visible_pitch );
 319                 p_in += p_src->p[i].i_pitch;
 320                 p_out += p_dest->p[i].i_pitch;
 321             }
 322         }
 323     }
 324 }
 325
 326 /*****************************************************************************
 327  * RenderBlur: renders a blurred picture
 328  *****************************************************************************/
 329 static void RenderBlur( vout_thread_t *p_vout, picture_t *p_oldpic,
 330                         picture_t *p_newpic, picture_t *p_outpic )
 331 {
 332     int i_plane;
 333     int i_oldfactor = p_vout->p_sys->i_factor;
 334     int i_newfactor = 128 - p_vout->p_sys->i_factor;
 335     for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
 336     {
 337         uint8_t *p_old, *p_new, *p_out, *p_out_end, *p_out_line_end;
 338         p_out = p_outpic->p[i_plane].p_pixels;
 339         p_new = p_newpic->p[i_plane].p_pixels;
 340         p_old = p_oldpic->p[i_plane].p_pixels;
 341         p_out_end = p_out + p_outpic->p[i_plane].i_pitch *
 342                              p_outpic->p[i_plane].i_visible_lines;
 343         while ( p_out < p_out_end )
 344         {
 345             p_out_line_end = p_out + p_outpic->p[i_plane].i_visible_pitch;
 346
 347             while ( p_out < p_out_line_end )
 348             {
 349                 *p_out++ = (((*p_old++) * i_oldfactor) +
 350                             ((*p_new++) * i_newfactor)) >> 7;
 351
 352 //                *p_out++ = (*p_old++ >> 1) + (*p_new++ >> 1);
 353             }
 354
 355             p_old += p_oldpic->p[i_plane].i_pitch
 356                       - p_oldpic->p[i_plane].i_visible_pitch;
 357             p_new += p_newpic->p[i_plane].i_pitch
 358                       - p_newpic->p[i_plane].i_visible_pitch;
 359             p_out += p_outpic->p[i_plane].i_pitch
 360                       - p_outpic->p[i_plane].i_visible_pitch;
 361         }
 362     }
 363 }
 364
 365 /*****************************************************************************
 366  * SendEvents: forward mouse and keyboard events to the parent p_vout
 367  *****************************************************************************/
 368 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 369                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 370 {
 371     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 372
 373     return VLC_SUCCESS;
 374 }
 375
 376 /*****************************************************************************
 377  * SendEventsToChild: forward events to the child/children vout
 378  *****************************************************************************/
 379 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 380                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 381 {
 382     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 383     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 384     return VLC_SUCCESS;
 385 }