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     set_category( CAT_VIDEO );
  61     set_subcategory( SUBCAT_VIDEO_VFILTER );
  62
  63     add_integer_with_range( "blur-factor", 80, 1, 127, NULL,
  64         MODE_TEXT, MODE_LONGTEXT, VLC_FALSE );
  65
  66     set_callbacks( Create, Destroy );
  67 vlc_module_end();
  68
  69 /*****************************************************************************
  70  * vout_sys_t: Deinterlace video output method descriptor
  71  *****************************************************************************
  72  * This structure is part of the video output thread descriptor.
  73  * It describes the Deinterlace specific properties of an output thread.
  74  *****************************************************************************/
  75 struct vout_sys_t
  76 {
  77     int        i_factor;        /* Deinterlace mode */
  78     vlc_bool_t b_double_rate; /* Shall we double the framerate? */
  79
  80     mtime_t    last_date;
  81     mtime_t    next_date;
  82
  83     vout_thread_t *p_vout;
  84     picture_t *p_lastpic;
  85 };
  86
  87 /*****************************************************************************
  88  * Control: control facility for the vout (forwards to child vout)
  89  *****************************************************************************/
  90 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
  91 {
  92     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
  93 }
  94
  95 /*****************************************************************************
  96  * Create: allocates Deinterlace video thread output method
  97  *****************************************************************************
  98  * This function allocates and initializes a Deinterlace vout method.
  99  *****************************************************************************/
 100 static int Create( vlc_object_t *p_this )
 101 {
 102     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 103
 104     /* Allocate structure */
 105     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 106     if( p_vout->p_sys == NULL )
 107     {
 108         msg_Err( p_vout, "out of memory" );
 109         return VLC_ENOMEM;
 110     }
 111
 112     p_vout->pf_init = Init;
 113     p_vout->pf_end = End;
 114     p_vout->pf_manage = NULL;
 115     p_vout->pf_render = Render;
 116     p_vout->pf_display = NULL;
 117     p_vout->pf_control = Control;
 118
 119     p_vout->p_sys->i_factor = config_GetInt( p_vout, "blur-factor" );
 120     p_vout->p_sys->b_double_rate = 0;
 121     p_vout->p_sys->last_date = 0;
 122     p_vout->p_sys->p_lastpic = NULL;
 123
 124     return VLC_SUCCESS;
 125 }
 126
 127 /*****************************************************************************
 128  * Init: initialize Deinterlace video thread output method
 129  *****************************************************************************/
 130 static int Init( vout_thread_t *p_vout )
 131 {
 132     int i_index;
 133     picture_t *p_pic;
 134     video_format_t fmt = {0};
 135
 136     I_OUTPUTPICTURES = 0;
 137
 138     /* Initialize the output structure, full of directbuffers since we want
 139      * the decoder to output directly to our structures. */
 140     switch( p_vout->render.i_chroma )
 141     {
 142         case VLC_FOURCC('I','4','2','0'):
 143         case VLC_FOURCC('I','Y','U','V'):
 144         case VLC_FOURCC('Y','V','1','2'):
 145         case VLC_FOURCC('I','4','2','2'):
 146             p_vout->output.i_chroma = p_vout->render.i_chroma;
 147             p_vout->output.i_width  = p_vout->render.i_width;
 148             p_vout->output.i_height = p_vout->render.i_height;
 149             p_vout->output.i_aspect = p_vout->render.i_aspect;
 150             break;
 151
 152         default:
 153             return VLC_EGENERIC; /* unknown chroma */
 154             break;
 155     }
 156
 157     msg_Dbg( p_vout, "spawning the real video output" );
 158
 159     fmt.i_width = fmt.i_visible_width = p_vout->output.i_width;
 160     fmt.i_height = fmt.i_visible_height = p_vout->output.i_height;
 161     fmt.i_x_offset = fmt.i_y_offset = 0;
 162     fmt.i_chroma = p_vout->output.i_chroma;
 163     fmt.i_aspect = p_vout->output.i_aspect;
 164     fmt.i_sar_num = p_vout->output.i_aspect * fmt.i_height / fmt.i_width;
 165     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 166
 167     switch( p_vout->render.i_chroma )
 168     {
 169     case VLC_FOURCC('I','4','2','0'):
 170     case VLC_FOURCC('I','Y','U','V'):
 171     case VLC_FOURCC('Y','V','1','2'):
 172         p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 173         break;
 174     default:
 175         break;
 176     }
 177
 178     /* Everything failed */
 179     if( p_vout->p_sys->p_vout == NULL )
 180     {
 181         msg_Err( p_vout, "cannot open vout, aborting" );
 182
 183         return VLC_EGENERIC;
 184     }
 185
 186     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 187
 188     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 189
 190     ADD_PARENT_CALLBACKS( SendEventsToChild );
 191
 192     return VLC_SUCCESS;
 193 }
 194
 195 /*****************************************************************************
 196  * End: terminate Deinterlace video thread output method
 197  *****************************************************************************/
 198 static void End( vout_thread_t *p_vout )
 199 {
 200     int i_index;
 201
 202     /* Free the fake output buffers we allocated */
 203     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 204     {
 205         i_index--;
 206         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 207     }
 208 }
 209
 210 /*****************************************************************************
 211  * Destroy: destroy Deinterlace video thread output method
 212  *****************************************************************************
 213  * Terminate an output method created by DeinterlaceCreateOutputMethod
 214  *****************************************************************************/
 215 static void Destroy( vlc_object_t *p_this )
 216 {
 217     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 218
 219     if( p_vout->p_sys->p_vout )
 220     {
 221         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 222         vlc_object_detach( p_vout->p_sys->p_vout );
 223         vout_Destroy( p_vout->p_sys->p_vout );
 224     }
 225
 226     DEL_PARENT_CALLBACKS( SendEventsToChild );
 227
 228     free( p_vout->p_sys );
 229 }
 230
 231 /*****************************************************************************
 232  * Render: displays previously rendered output
 233  *****************************************************************************
 234  * This function send the currently rendered image to Deinterlace image,
 235  * waits until it is displayed and switch the two rendering buffers, preparing
 236  * next frame.
 237  *****************************************************************************/
 238 static void Render ( vout_thread_t *p_vout, picture_t *p_pic )
 239 {
 240     picture_t * p_outpic;
 241     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 242            == NULL )
 243     {
 244         if( p_vout->b_die || p_vout->b_error )
 245         {
 246             return;
 247         }
 248         msleep( VOUT_OUTMEM_SLEEP );
 249     }
 250     vout_DatePicture( p_vout, p_outpic, p_pic->date );
 251
 252     if ( p_vout->p_sys->p_lastpic == NULL )
 253     {
 254         /* Get a new picture */
 255         while( ( p_vout->p_sys->p_lastpic =
 256                  vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 257                == NULL )
 258         {
 259             if( p_vout->b_die || p_vout->b_error )
 260             {
 261                 return;
 262             }
 263             msleep( VOUT_OUTMEM_SLEEP );
 264         }
 265         CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_pic );
 266         CopyPicture( p_vout, p_outpic, p_pic );
 267         vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 268         return;
 269     }
 270
 271     /* Get a new picture */
 272     RenderBlur( p_vout, p_vout->p_sys->p_lastpic, p_pic, p_outpic );
 273     vout_DestroyPicture( p_vout, p_vout->p_sys->p_lastpic );
 274
 275
 276     /* Get a new picture */
 277     while( ( p_vout->p_sys->p_lastpic =
 278              vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 279            == NULL )
 280     {
 281         if( p_vout->b_die || p_vout->b_error )
 282         {
 283             return;
 284         }
 285         msleep( VOUT_OUTMEM_SLEEP );
 286     }
 287     CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_outpic );
 288     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 289 }
 290
 291 /* FIXME: this is a verbatim copy from src/video_output/vout_pictures.c */
 292 /* XXX: the order is fucked up!! */
 293 static void CopyPicture( vout_thread_t * p_vout,
 294                          picture_t *p_dest, picture_t *p_src )
 295 {
 296     int i;
 297
 298     for( i = 0; i < p_src->i_planes ; i++ )
 299     {
 300         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
 301         {
 302             /* There are margins, but with the same width : perfect ! */
 303             p_vout->p_vlc->pf_memcpy(
 304                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
 305                          p_src->p[i].i_pitch * p_src->p[i].i_visible_lines );
 306         }
 307         else
 308         {
 309             /* We need to proceed line by line */
 310             uint8_t *p_in = p_src->p[i].p_pixels;
 311             uint8_t *p_out = p_dest->p[i].p_pixels;
 312             int i_line;
 313
 314             for( i_line = p_src->p[i].i_visible_lines; i_line--; )
 315             {
 316                 p_vout->p_vlc->pf_memcpy( p_out, p_in,
 317                                           p_src->p[i].i_visible_pitch );
 318                 p_in += p_src->p[i].i_pitch;
 319                 p_out += p_dest->p[i].i_pitch;
 320             }
 321         }
 322     }
 323 }
 324
 325 /*****************************************************************************
 326  * RenderBlur: renders a blurred picture
 327  *****************************************************************************/
 328 static void RenderBlur( vout_thread_t *p_vout, picture_t *p_oldpic,
 329                         picture_t *p_newpic, picture_t *p_outpic )
 330 {
 331     int i_plane;
 332     int i_oldfactor = p_vout->p_sys->i_factor;
 333     int i_newfactor = 128 - p_vout->p_sys->i_factor;
 334     for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
 335     {
 336         uint8_t *p_old, *p_new, *p_out, *p_out_end, *p_out_line_end;
 337         p_out = p_outpic->p[i_plane].p_pixels;
 338         p_new = p_newpic->p[i_plane].p_pixels;
 339         p_old = p_oldpic->p[i_plane].p_pixels;
 340         p_out_end = p_out + p_outpic->p[i_plane].i_pitch *
 341                              p_outpic->p[i_plane].i_visible_lines;
 342         while ( p_out < p_out_end )
 343         {
 344             p_out_line_end = p_out + p_outpic->p[i_plane].i_visible_pitch;
 345
 346             while ( p_out < p_out_line_end )
 347             {
 348                 *p_out++ = (((*p_old++) * i_oldfactor) +
 349                             ((*p_new++) * i_newfactor)) >> 7;
 350
 351 //                *p_out++ = (*p_old++ >> 1) + (*p_new++ >> 1);
 352             }
 353
 354             p_old += p_oldpic->p[i_plane].i_pitch
 355                       - p_oldpic->p[i_plane].i_visible_pitch;
 356             p_new += p_newpic->p[i_plane].i_pitch
 357                       - p_newpic->p[i_plane].i_visible_pitch;
 358             p_out += p_outpic->p[i_plane].i_pitch
 359                       - p_outpic->p[i_plane].i_visible_pitch;
 360         }
 361     }
 362 }
 363
 364 /*****************************************************************************
 365  * SendEvents: forward mouse and keyboard events to the parent p_vout
 366  *****************************************************************************/
 367 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 368                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 369 {
 370     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 371
 372     return VLC_SUCCESS;
 373 }
 374
 375 /*****************************************************************************
 376  * SendEventsToChild: forward events to the child/children vout
 377  *****************************************************************************/
 378 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 379                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 380 {
 381     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 382     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 383     return VLC_SUCCESS;
 384 }