efb0e0fde2eed06a83ab7673a86a75cb0566ea48
[vlc.git] / 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: motionblur.c,v 1.9 2003/03/18 23:30:28 gbazin 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 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")
55 #define MODE_LONGTEXT N_("The degree of blurring from 1 to 127")
56
57 vlc_module_begin();
58     add_category_hint( N_("Miscellaneous"), NULL, VLC_FALSE );
59     add_integer( "blur-factor", 80, NULL, MODE_TEXT, MODE_LONGTEXT, VLC_FALSE );
60     set_description( _("Motion blur filter") );
61     set_capability( "video filter", 0 );
62     set_callbacks( Create, Destroy );
63 vlc_module_end();
64
65 /*****************************************************************************
66  * vout_sys_t: Deinterlace video output method descriptor
67  *****************************************************************************
68  * This structure is part of the video output thread descriptor.
69  * It describes the Deinterlace specific properties of an output thread.
70  *****************************************************************************/
71 struct vout_sys_t
72 {
73     int        i_factor;        /* Deinterlace mode */
74     vlc_bool_t b_double_rate; /* Shall we double the framerate? */
75
76     mtime_t    last_date;
77     mtime_t    next_date;
78
79     vout_thread_t *p_vout;
80     picture_t *p_lastpic;
81 };
82
83 /*****************************************************************************
84  * Create: allocates Deinterlace video thread output method
85  *****************************************************************************
86  * This function allocates and initializes a Deinterlace vout method.
87  *****************************************************************************/
88 static int Create( vlc_object_t *p_this )
89 {
90     vout_thread_t *p_vout = (vout_thread_t *)p_this;
91
92     /* Allocate structure */
93     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
94     if( p_vout->p_sys == NULL )
95     {
96         msg_Err( p_vout, "out of memory" );
97         return VLC_ENOMEM;
98     }
99
100     p_vout->pf_init = Init;
101     p_vout->pf_end = End;
102     p_vout->pf_manage = NULL;
103     p_vout->pf_render = Render;
104     p_vout->pf_display = NULL;
105
106     p_vout->p_sys->i_factor = config_GetInt( p_vout, "blur-factor" );
107     p_vout->p_sys->b_double_rate = 0;
108     p_vout->p_sys->last_date = 0;
109     p_vout->p_sys->p_lastpic = NULL;
110
111     return VLC_SUCCESS;
112 }
113
114 /*****************************************************************************
115  * Init: initialize Deinterlace video thread output method
116  *****************************************************************************/
117 static int Init( vout_thread_t *p_vout )
118 {
119     int i_index;
120     picture_t *p_pic;
121
122     I_OUTPUTPICTURES = 0;
123
124     /* Initialize the output structure, full of directbuffers since we want
125      * the decoder to output directly to our structures. */
126     switch( p_vout->render.i_chroma )
127     {
128         case VLC_FOURCC('I','4','2','0'):
129         case VLC_FOURCC('I','Y','U','V'):
130         case VLC_FOURCC('Y','V','1','2'):
131         case VLC_FOURCC('I','4','2','2'):
132             p_vout->output.i_chroma = p_vout->render.i_chroma;
133             p_vout->output.i_width  = p_vout->render.i_width;
134             p_vout->output.i_height = p_vout->render.i_height;
135             p_vout->output.i_aspect = p_vout->render.i_aspect;
136             break;
137
138         default:
139             return VLC_EGENERIC; /* unknown chroma */
140             break;
141     }
142
143     msg_Dbg( p_vout, "spawning the real video output" );
144
145     switch( p_vout->render.i_chroma )
146     {
147     case VLC_FOURCC('I','4','2','0'):
148     case VLC_FOURCC('I','Y','U','V'):
149     case VLC_FOURCC('Y','V','1','2'):
150         p_vout->p_sys->p_vout = vout_Create( p_vout,
151                            p_vout->output.i_width, p_vout->output.i_height,
152                            p_vout->output.i_chroma, p_vout->output.i_aspect );
153         break;
154     default:
155         break;
156     }
157
158     /* Everything failed */
159     if( p_vout->p_sys->p_vout == NULL )
160     {
161         msg_Err( p_vout, "cannot open vout, aborting" );
162
163         return VLC_EGENERIC;
164     }
165
166     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
167
168     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
169
170     return VLC_SUCCESS;
171 }
172
173 /*****************************************************************************
174  * End: terminate Deinterlace video thread output method
175  *****************************************************************************/
176 static void End( vout_thread_t *p_vout )
177 {
178     int i_index;
179
180     /* Free the fake output buffers we allocated */
181     for( i_index = I_OUTPUTPICTURES ; i_index ; )
182     {
183         i_index--;
184         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
185     }
186 }
187
188 /*****************************************************************************
189  * Destroy: destroy Deinterlace video thread output method
190  *****************************************************************************
191  * Terminate an output method created by DeinterlaceCreateOutputMethod
192  *****************************************************************************/
193 static void Destroy( vlc_object_t *p_this )
194 {
195     vout_thread_t *p_vout = (vout_thread_t *)p_this;
196
197     DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
198     vlc_object_detach( p_vout->p_sys->p_vout );
199     vout_Destroy( p_vout->p_sys->p_vout );
200
201     free( p_vout->p_sys );
202 }
203
204 /*****************************************************************************
205  * Render: displays previously rendered output
206  *****************************************************************************
207  * This function send the currently rendered image to Deinterlace image,
208  * waits until it is displayed and switch the two rendering buffers, preparing
209  * next frame.
210  *****************************************************************************/
211 static void Render ( vout_thread_t *p_vout, picture_t *p_pic )
212 {
213     picture_t * p_outpic;
214     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
215            == NULL )
216     {
217         if( p_vout->b_die || p_vout->b_error )
218         {
219             return;
220         }
221         msleep( VOUT_OUTMEM_SLEEP );
222     }
223     vout_DatePicture( p_vout, p_outpic, p_pic->date );
224
225     if ( p_vout->p_sys->p_lastpic == NULL )
226     {
227         /* Get a new picture */
228         while( ( p_vout->p_sys->p_lastpic =
229                  vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
230                == NULL )
231         {
232             if( p_vout->b_die || p_vout->b_error )
233             {
234                 return;
235             }
236             msleep( VOUT_OUTMEM_SLEEP );
237         }
238         CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_pic );
239         CopyPicture( p_vout, p_outpic, p_pic );
240         vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
241         return;
242     }
243
244     /* Get a new picture */
245     RenderBlur( p_vout, p_vout->p_sys->p_lastpic, p_pic, p_outpic );
246     vout_DestroyPicture( p_vout, p_vout->p_sys->p_lastpic );
247
248
249     /* Get a new picture */
250     while( ( p_vout->p_sys->p_lastpic =
251              vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
252            == NULL )
253     {
254         if( p_vout->b_die || p_vout->b_error )
255         {
256             return;
257         }
258         msleep( VOUT_OUTMEM_SLEEP );
259     }
260     CopyPicture( p_vout, p_vout->p_sys->p_lastpic, p_outpic );
261     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
262 }
263
264 /* FIXME: this is a verbatim copy from src/video_output/vout_pictures.c */
265 /* XXX: the order is fucked up!! */
266 static void CopyPicture( vout_thread_t * p_vout,
267                          picture_t *p_dest, picture_t *p_src )
268 {
269     int i;
270
271     for( i = 0; i < p_src->i_planes ; i++ )
272     {
273         if( p_src->p[i].i_pitch == p_dest->p[i].i_pitch )
274         {
275             /* There are margins, but with the same width : perfect ! */
276             p_vout->p_vlc->pf_memcpy(
277                          p_dest->p[i].p_pixels, p_src->p[i].p_pixels,
278                          p_src->p[i].i_pitch * p_src->p[i].i_lines );
279         }
280         else
281         {
282             /* We need to proceed line by line */
283             uint8_t *p_in = p_src->p[i].p_pixels;
284             uint8_t *p_out = p_dest->p[i].p_pixels;
285             int i_line;
286
287             for( i_line = p_src->p[i].i_lines; i_line--; )
288             {
289                 p_vout->p_vlc->pf_memcpy( p_out, p_in,
290                                           p_src->p[i].i_visible_pitch );
291                 p_in += p_src->p[i].i_pitch;
292                 p_out += p_dest->p[i].i_pitch;
293             }
294         }
295     }
296 }
297
298 /*****************************************************************************
299  * RenderBlur: renders a blurred picture
300  *****************************************************************************/
301 static void RenderBlur( vout_thread_t *p_vout, picture_t *p_oldpic,
302                         picture_t *p_newpic, picture_t *p_outpic )
303 {
304     int i_plane;
305     int i_oldfactor = p_vout->p_sys->i_factor;
306     int i_newfactor = 128 - p_vout->p_sys->i_factor;
307     for( i_plane = 0; i_plane < p_outpic->i_planes; i_plane++ )
308     {
309         uint8_t *p_old, *p_new, *p_out, *p_out_end, *p_out_line_end;
310         p_out = p_outpic->p[i_plane].p_pixels;
311         p_new = p_newpic->p[i_plane].p_pixels;
312         p_old = p_oldpic->p[i_plane].p_pixels;
313         p_out_end = p_out + p_outpic->p[i_plane].i_pitch *
314                              p_outpic->p[i_plane].i_lines;
315         while ( p_out < p_out_end )
316         {
317             p_out_line_end = p_out + p_outpic->p[i_plane].i_visible_pitch;
318
319             while ( p_out < p_out_line_end )
320             {
321                 *p_out++ = (((*p_old++) * i_oldfactor) +
322                             ((*p_new++) * i_newfactor)) >> 7;
323
324 //                *p_out++ = (*p_old++ >> 1) + (*p_new++ >> 1);
325             }
326
327             p_old += p_oldpic->p[i_plane].i_pitch
328                       - p_oldpic->p[i_plane].i_visible_pitch;
329             p_new += p_newpic->p[i_plane].i_pitch
330                       - p_newpic->p[i_plane].i_visible_pitch;
331             p_out += p_outpic->p[i_plane].i_pitch
332                       - p_outpic->p[i_plane].i_visible_pitch;
333         }
334     }
335 }
336
337 /*****************************************************************************
338  * SendEvents: forward mouse and keyboard events to the parent p_vout
339  *****************************************************************************/
340 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
341                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
342 {
343     var_Set( (vlc_object_t *)p_data, psz_var, newval );
344
345     return VLC_SUCCESS;
346 }
347