1 /*****************************************************************************
2 * motion_blur.c : motion blur filter for vlc
3 *****************************************************************************
4 * Copyright (C) 2000, 2001 VideoLAN
5 * $Id: motionblur.c,v 1.3 2002/11/23 02:40:30 sam Exp $
7 * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no>
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.
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.
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 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
33 #include "filter_common.h"
35 /*****************************************************************************
37 *****************************************************************************/
38 static int Create ( vlc_object_t * );
39 static void Destroy ( vlc_object_t * );
41 static int Init ( vout_thread_t * );
42 static void End ( vout_thread_t * );
43 static void Render ( vout_thread_t *, picture_t * );
45 static void RenderBlur ( vout_thread_t *, picture_t *, picture_t *, picture_t * );
46 static void CopyPicture ( vout_thread_t*, picture_t *, picture_t * );
48 /*****************************************************************************
50 *****************************************************************************/
51 #define MODE_TEXT N_("Blur factor")
52 #define MODE_LONGTEXT N_("The degree of blurring from 1 to 127")
55 add_category_hint( N_("Miscellaneous"), NULL );
56 add_integer( "blur-factor", 80, NULL, MODE_TEXT, MODE_LONGTEXT );
57 set_description( _("Motion blur filter") );
58 set_capability( "video filter", 0 );
59 set_callbacks( Create, Destroy );
62 /*****************************************************************************
63 * vout_sys_t: Deinterlace video output method descriptor
64 *****************************************************************************
65 * This structure is part of the video output thread descriptor.
66 * It describes the Deinterlace specific properties of an output thread.
67 *****************************************************************************/
70 int i_factor; /* Deinterlace mode */
71 vlc_bool_t b_double_rate; /* Shall we double the framerate? */
76 vout_thread_t *p_vout;
80 /*****************************************************************************
81 * Create: allocates Deinterlace video thread output method
82 *****************************************************************************
83 * This function allocates and initializes a Deinterlace vout method.
84 *****************************************************************************/
85 static int Create( vlc_object_t *p_this )
87 vout_thread_t *p_vout = (vout_thread_t *)p_this;
89 /* Allocate structure */
90 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
91 if( p_vout->p_sys == NULL )
93 msg_Err( p_vout, "out of memory" );
97 p_vout->pf_init = Init;
99 p_vout->pf_manage = NULL;
100 p_vout->pf_render = Render;
101 p_vout->pf_display = NULL;
103 p_vout->p_sys->i_factor = config_GetInt( p_vout, "blur-factor" );
104 p_vout->p_sys->b_double_rate = 0;
105 p_vout->p_sys->last_date = 0;
106 p_vout->p_sys->p_lastpic = NULL;
111 /*****************************************************************************
112 * Init: initialize Deinterlace video thread output method
113 *****************************************************************************/
114 static int Init( vout_thread_t *p_vout )
119 I_OUTPUTPICTURES = 0;
121 /* Initialize the output structure, full of directbuffers since we want
122 * the decoder to output directly to our structures. */
123 switch( p_vout->render.i_chroma )
125 case VLC_FOURCC('I','4','2','0'):
126 case VLC_FOURCC('I','Y','U','V'):
127 case VLC_FOURCC('Y','V','1','2'):
128 case VLC_FOURCC('I','4','2','2'):
129 p_vout->output.i_chroma = p_vout->render.i_chroma;
130 p_vout->output.i_width = p_vout->render.i_width;
131 p_vout->output.i_height = p_vout->render.i_height;
132 p_vout->output.i_aspect = p_vout->render.i_aspect;
136 return 0; /* unknown chroma */
140 msg_Dbg( p_vout, "spawning the real video output" );
142 switch( p_vout->render.i_chroma )
144 case VLC_FOURCC('I','4','2','0'):
145 case VLC_FOURCC('I','Y','U','V'):
146 case VLC_FOURCC('Y','V','1','2'):
147 p_vout->p_sys->p_vout =
148 vout_CreateThread( p_vout,
149 p_vout->output.i_width, p_vout->output.i_height,
150 p_vout->output.i_chroma, p_vout->output.i_aspect );
156 /* Everything failed */
157 if( p_vout->p_sys->p_vout == NULL )
159 msg_Err( p_vout, "cannot open vout, aborting" );
164 ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
169 /*****************************************************************************
170 * End: terminate Deinterlace video thread output method
171 *****************************************************************************/
172 static void End( vout_thread_t *p_vout )
176 /* Free the fake output buffers we allocated */
177 for( i_index = I_OUTPUTPICTURES ; i_index ; )
180 free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
184 /*****************************************************************************
185 * Destroy: destroy Deinterlace video thread output method
186 *****************************************************************************
187 * Terminate an output method created by DeinterlaceCreateOutputMethod
188 *****************************************************************************/
189 static void Destroy( vlc_object_t *p_this )
191 vout_thread_t *p_vout = (vout_thread_t *)p_this;
193 vout_DestroyThread( p_vout->p_sys->p_vout );
195 free( p_vout->p_sys );
198 /*****************************************************************************
199 * Render: displays previously rendered output
200 *****************************************************************************
201 * This function send the currently rendered image to Deinterlace image,
202 * waits until it is displayed and switch the two rendering buffers, preparing
204 *****************************************************************************/
205 static void Render ( vout_thread_t *p_vout, picture_t *p_pic )
207 picture_t * p_outpic;
208 while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
211 if( p_vout->b_die || p_vout->b_error )
215 msleep( VOUT_OUTMEM_SLEEP );
217 vout_DatePicture( p_vout, p_outpic, p_pic->date );
219 if ( p_vout->p_sys->p_lastpic == NULL )
221 /* Get a new picture */
222 while( ( p_vout->p_sys->p_lastpic =
223 vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
226 if( p_vout->b_die || p_vout->b_error )
230 msleep( VOUT_OUTMEM_SLEEP );
232 CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_pic );
233 CopyPicture( p_vout, p_outpic, p_pic );
234 vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
238 /* Get a new picture */
239 RenderBlur( p_vout, p_vout->p_sys->p_lastpic, p_pic, p_outpic );
240 vout_DestroyPicture( p_vout, p_vout->p_sys->p_lastpic );
243 /* Get a new picture */
244 while( ( p_vout->p_sys->p_lastpic =
245 vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
248 if( p_vout->b_die || p_vout->b_error )
252 msleep( VOUT_OUTMEM_SLEEP );
254 CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_outpic );
255 vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
259 static void CopyPicture( vout_thread_t *p_vout,
260 picture_t *p_dest, picture_t *p_source)
264 for( i_plane = 0 ; i_plane < p_dest->i_planes ; i_plane++ )
268 p_in = p_source->p[i_plane].p_pixels;
270 p_out = p_dest->p[i_plane].p_pixels;
271 p_vout->p_vlc->pf_memcpy( p_out, p_in,
272 p_dest->p[i_plane].i_pitch *
273 p_dest->p[i_plane].i_lines);
276 /*****************************************************************************
277 * RenderBob: renders a bob picture
278 *****************************************************************************/
279 static void RenderBlur( vout_thread_t *p_vout, picture_t *p_oldpic,
280 picture_t *p_newpic, picture_t *p_outpic )
283 int i_oldfactor = p_vout->p_sys->i_factor;
284 int i_newfactor = 128 - p_vout->p_sys->i_factor;
285 for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
287 u8 *p_old, *p_new, *p_out, *p_out_end;
288 p_out = p_outpic->p[i_plane].p_pixels;
289 p_new = p_newpic->p[i_plane].p_pixels;
290 p_old = p_oldpic->p[i_plane].p_pixels;
291 p_out_end = p_out + p_outpic->p[i_plane].i_pitch *
292 p_outpic->p[i_plane].i_lines;
293 while ( p_out < p_out_end )
295 *p_out++ = (((*p_old++) * i_oldfactor) +
296 ((*p_new++) * i_newfactor)) >> 7;
298 // *p_out++ = (*p_old++ >> 1) + (*p_new++ >> 1);