* ./modules/video_output/wingdi.c: the GDI video output now properly sets
[vlc.git] / modules / video_filter / motionblur.c
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 $
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 /*****************************************************************************
49  * Module descriptor
50  *****************************************************************************/
51 #define MODE_TEXT N_("Blur factor")
52 #define MODE_LONGTEXT N_("The degree of blurring from 1 to 127")
53
54 vlc_module_begin();
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 );
60 vlc_module_end();
61
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  *****************************************************************************/
68 struct vout_sys_t
69 {
70     int        i_factor;        /* Deinterlace mode */
71     vlc_bool_t b_double_rate; /* Shall we double the framerate? */
72
73     mtime_t    last_date;
74     mtime_t    next_date;
75
76     vout_thread_t *p_vout;
77     picture_t *p_lastpic;
78 };
79
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 )
86 {   
87     vout_thread_t *p_vout = (vout_thread_t *)p_this;
88
89     /* Allocate structure */
90     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
91     if( p_vout->p_sys == NULL )
92     {
93         msg_Err( p_vout, "out of memory" );
94         return 1;
95     }
96
97     p_vout->pf_init = Init;
98     p_vout->pf_end = End;
99     p_vout->pf_manage = NULL;
100     p_vout->pf_render = Render;
101     p_vout->pf_display = NULL;
102
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;
107
108     return 0;
109 }
110
111 /*****************************************************************************
112  * Init: initialize Deinterlace video thread output method
113  *****************************************************************************/
114 static int Init( vout_thread_t *p_vout )
115 {
116     int i_index;
117     picture_t *p_pic;
118     
119     I_OUTPUTPICTURES = 0;
120
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 )
124     {
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;
133             break;
134
135         default:
136             return 0; /* unknown chroma */
137             break;
138     }
139
140     msg_Dbg( p_vout, "spawning the real video output" );
141
142     switch( p_vout->render.i_chroma )
143     {
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 );
151         break;
152     default:
153         break;
154     }
155
156     /* Everything failed */
157     if( p_vout->p_sys->p_vout == NULL )
158     {
159         msg_Err( p_vout, "cannot open vout, aborting" );
160
161         return 0;
162     }
163  
164     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
165
166     return 0;
167 }
168
169 /*****************************************************************************
170  * End: terminate Deinterlace video thread output method
171  *****************************************************************************/
172 static void End( vout_thread_t *p_vout )
173 {
174     int i_index;
175
176     /* Free the fake output buffers we allocated */
177     for( i_index = I_OUTPUTPICTURES ; i_index ; )
178     {
179         i_index--;
180         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
181     }
182 }
183
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 )
190 {
191     vout_thread_t *p_vout = (vout_thread_t *)p_this;
192
193     vout_DestroyThread( p_vout->p_sys->p_vout );
194
195     free( p_vout->p_sys );
196 }
197
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
203  * next frame.
204  *****************************************************************************/
205 static void Render ( vout_thread_t *p_vout, picture_t *p_pic )
206 {
207     picture_t * p_outpic;
208     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
209            == NULL )
210     {
211         if( p_vout->b_die || p_vout->b_error )
212         {
213             return;
214         }
215         msleep( VOUT_OUTMEM_SLEEP );
216     }
217     vout_DatePicture( p_vout, p_outpic, p_pic->date );
218     
219     if ( p_vout->p_sys->p_lastpic == NULL )
220     {
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 ) )
224                == NULL )
225         {
226             if( p_vout->b_die || p_vout->b_error )
227             {
228                 return;
229             }
230             msleep( VOUT_OUTMEM_SLEEP );
231         }
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 );
235         return;
236     }
237
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 );
241
242
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 ) )
246            == NULL )
247     {
248         if( p_vout->b_die || p_vout->b_error )
249         {
250             return;
251         }
252         msleep( VOUT_OUTMEM_SLEEP );
253     }
254     CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_outpic );
255     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
256
257 }
258
259 static void CopyPicture( vout_thread_t *p_vout,
260                          picture_t *p_dest, picture_t *p_source)
261 {
262     int i_plane;
263
264     for( i_plane = 0 ; i_plane < p_dest->i_planes ; i_plane++ )
265     {
266         u8 *p_in, *p_out;
267
268         p_in = p_source->p[i_plane].p_pixels;
269
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);
274     }
275 }
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 )
281 {
282     int i_plane;
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++ )
286     {
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 )
294         {
295             *p_out++ = (((*p_old++) * i_oldfactor) +
296                         ((*p_new++) * i_newfactor)) >> 7;
297             
298 //            *p_out++ = (*p_old++ >> 1) + (*p_new++ >> 1);
299                 
300         }
301     }
302 }