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     video_format_t fmt = {0};
 133
 134     I_OUTPUTPICTURES = 0;
 135
 136     /* Initialize the output structure, full of directbuffers since we want
 137      * the decoder to output directly to our structures. */
 138     switch( p_vout->render.i_chroma )
 139     {
 140         case VLC_FOURCC('I','4','2','0'):
 141         case VLC_FOURCC('I','Y','U','V'):
 142         case VLC_FOURCC('Y','V','1','2'):
 143         case VLC_FOURCC('I','4','2','2'):
 144             p_vout->output.i_chroma = p_vout->render.i_chroma;
 145             p_vout->output.i_width  = p_vout->render.i_width;
 146             p_vout->output.i_height = p_vout->render.i_height;
 147             p_vout->output.i_aspect = p_vout->render.i_aspect;
 148             break;
 149
 150         default:
 151             return VLC_EGENERIC; /* unknown chroma */
 152             break;
 153     }
 154
 155     msg_Dbg( p_vout, "spawning the real video output" );
 156
 157     fmt.i_width = fmt.i_visible_width = p_vout->output.i_width;
 158     fmt.i_height = fmt.i_visible_height = p_vout->output.i_height;
 159     fmt.i_x_offset = fmt.i_y_offset = 0;
 160     fmt.i_chroma = p_vout->output.i_chroma;
 161     fmt.i_aspect = p_vout->output.i_aspect;
 162     fmt.i_sar_num = p_vout->output.i_aspect * fmt.i_height / fmt.i_width;
 163     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 164
 165     switch( p_vout->render.i_chroma )
 166     {
 167     case VLC_FOURCC('I','4','2','0'):
 168     case VLC_FOURCC('I','Y','U','V'):
 169     case VLC_FOURCC('Y','V','1','2'):
 170         p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 171         break;
 172     default:
 173         break;
 174     }
 175
 176     /* Everything failed */
 177     if( p_vout->p_sys->p_vout == NULL )
 178     {
 179         msg_Err( p_vout, "cannot open vout, aborting" );
 180
 181         return VLC_EGENERIC;
 182     }
 183
 184     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 185
 186     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 187
 188     ADD_PARENT_CALLBACKS( SendEventsToChild );
 189
 190     return VLC_SUCCESS;
 191 }
 192
 193 /*****************************************************************************
 194  * End: terminate Deinterlace video thread output method
 195  *****************************************************************************/
 196 static void End( vout_thread_t *p_vout )
 197 {
 198     int i_index;
 199
 200     /* Free the fake output buffers we allocated */
 201     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 202     {
 203         i_index--;
 204         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 205     }
 206 }
 207
 208 /*****************************************************************************
 209  * Destroy: destroy Deinterlace video thread output method
 210  *****************************************************************************
 211  * Terminate an output method created by DeinterlaceCreateOutputMethod
 212  *****************************************************************************/
 213 static void Destroy( vlc_object_t *p_this )
 214 {
 215     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 216
 217     if( p_vout->p_sys->p_vout )
 218     {
 219         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 220         vlc_object_detach( p_vout->p_sys->p_vout );
 221         vout_Destroy( p_vout->p_sys->p_vout );
 222     }
 223
 224     DEL_PARENT_CALLBACKS( SendEventsToChild );
 225
 226     free( p_vout->p_sys );
 227 }
 228
 229 /*****************************************************************************
 230  * Render: displays previously rendered output
 231  *****************************************************************************
 232  * This function send the currently rendered image to Deinterlace image,
 233  * waits until it is displayed and switch the two rendering buffers, preparing
 234  * next frame.
 235  *****************************************************************************/
 236 static void Render ( vout_thread_t *p_vout, picture_t *p_pic )
 237 {
 238     picture_t * p_outpic;
 239     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 240            == NULL )
 241     {
 242         if( p_vout->b_die || p_vout->b_error )
 243         {
 244             return;
 245         }
 246         msleep( VOUT_OUTMEM_SLEEP );
 247     }
 248     vout_DatePicture( p_vout, p_outpic, p_pic->date );
 249
 250     if ( p_vout->p_sys->p_lastpic == NULL )
 251     {
 252         /* Get a new picture */
 253         while( ( p_vout->p_sys->p_lastpic =
 254                  vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 255                == NULL )
 256         {
 257             if( p_vout->b_die || p_vout->b_error )
 258             {
 259                 return;
 260             }
 261             msleep( VOUT_OUTMEM_SLEEP );
 262         }
 263         CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_pic );
 264         CopyPicture( p_vout, p_outpic, p_pic );
 265         vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 266         return;
 267     }
 268
 269     /* Get a new picture */
 270     RenderBlur( p_vout, p_vout->p_sys->p_lastpic, p_pic, p_outpic );
 271     vout_DestroyPicture( p_vout, p_vout->p_sys->p_lastpic );
 272
 273
 274     /* Get a new picture */
 275     while( ( p_vout->p_sys->p_lastpic =
 276              vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 277            == NULL )
 278     {
 279         if( p_vout->b_die || p_vout->b_error )
 280         {
 281             return;
 282         }
 283         msleep( VOUT_OUTMEM_SLEEP );
 284     }
 285     CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_outpic );
 286     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 287 }
 288
 289 /* FIXME: this is a verbatim copy from src/video_output/vout_pictures.c */
 290 /* XXX: the order is fucked up!! */
 291 static void CopyPicture( vout_thread_t * p_vout,
 292                          picture_t *p_dest, picture_t *p_src )
 293 {
 294     int i;
 295
 296     for( i = 0; i < p_src->i_planes ; i++ )
 297     {
 298         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
 299         {
 300             /* There are margins, but with the same width : perfect ! */
 301             p_vout->p_vlc->pf_memcpy(
 302                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
 303                          p_src->p[i].i_pitch * p_src->p[i].i_visible_lines );
 304         }
 305         else
 306         {
 307             /* We need to proceed line by line */
 308             uint8_t *p_in = p_src->p[i].p_pixels;
 309             uint8_t *p_out = p_dest->p[i].p_pixels;
 310             int i_line;
 311
 312             for( i_line = p_src->p[i].i_visible_lines; i_line--; )
 313             {
 314                 p_vout->p_vlc->pf_memcpy( p_out, p_in,
 315                                           p_src->p[i].i_visible_pitch );
 316                 p_in += p_src->p[i].i_pitch;
 317                 p_out += p_dest->p[i].i_pitch;
 318             }
 319         }
 320     }
 321 }
 322
 323 /*****************************************************************************
 324  * RenderBlur: renders a blurred picture
 325  *****************************************************************************/
 326 static void RenderBlur( vout_thread_t *p_vout, picture_t *p_oldpic,
 327                         picture_t *p_newpic, picture_t *p_outpic )
 328 {
 329     int i_plane;
 330     int i_oldfactor = p_vout->p_sys->i_factor;
 331     int i_newfactor = 128 - p_vout->p_sys->i_factor;
 332     for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
 333     {
 334         uint8_t *p_old, *p_new, *p_out, *p_out_end, *p_out_line_end;
 335         p_out = p_outpic->p[i_plane].p_pixels;
 336         p_new = p_newpic->p[i_plane].p_pixels;
 337         p_old = p_oldpic->p[i_plane].p_pixels;
 338         p_out_end = p_out + p_outpic->p[i_plane].i_pitch *
 339                              p_outpic->p[i_plane].i_visible_lines;
 340         while ( p_out < p_out_end )
 341         {
 342             p_out_line_end = p_out + p_outpic->p[i_plane].i_visible_pitch;
 343
 344             while ( p_out < p_out_line_end )
 345             {
 346                 *p_out++ = (((*p_old++) * i_oldfactor) +
 347                             ((*p_new++) * i_newfactor)) >> 7;
 348
 349 //                *p_out++ = (*p_old++ >> 1) + (*p_new++ >> 1);
 350             }
 351
 352             p_old += p_oldpic->p[i_plane].i_pitch
 353                       - p_oldpic->p[i_plane].i_visible_pitch;
 354             p_new += p_newpic->p[i_plane].i_pitch
 355                       - p_newpic->p[i_plane].i_visible_pitch;
 356             p_out += p_outpic->p[i_plane].i_pitch
 357                       - p_outpic->p[i_plane].i_visible_pitch;
 358         }
 359     }
 360 }
 361
 362 /*****************************************************************************
 363  * SendEvents: forward mouse and keyboard events to the parent p_vout
 364  *****************************************************************************/
 365 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 366                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 367 {
 368     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 369
 370     return VLC_SUCCESS;
 371 }
 372
 373 /*****************************************************************************
 374  * SendEventsToChild: forward events to the child/children vout
 375  *****************************************************************************/
 376 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 377                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 378 {
 379     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 380     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 381     return VLC_SUCCESS;
 382 }