1 /*****************************************************************************
2 * distort.c : Misc video effects plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2000, 2001, 2002, 2003 the VideoLAN team
7 * Authors: Samuel Hocevar <sam@zoy.org>
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() */
30 #include <math.h> /* sin(), cos() */
35 #include "filter_common.h"
37 #define DISTORT_MODE_WAVE 1
38 #define DISTORT_MODE_RIPPLE 2
40 /*****************************************************************************
42 *****************************************************************************/
43 static int Create ( vlc_object_t * );
44 static void Destroy ( vlc_object_t * );
46 static int Init ( vout_thread_t * );
47 static void End ( vout_thread_t * );
48 static void Render ( vout_thread_t *, picture_t * );
50 static void DistortWave ( vout_thread_t *, picture_t *, picture_t * );
51 static void DistortRipple ( vout_thread_t *, picture_t *, picture_t * );
53 static int SendEvents ( vlc_object_t *, char const *,
54 vlc_value_t, vlc_value_t, void * );
56 /*****************************************************************************
58 *****************************************************************************/
59 #define MODE_TEXT N_("Distort mode")
60 #define MODE_LONGTEXT N_("Distort mode, one of \"wave\" and \"ripple\"")
62 static char *mode_list[] = { "wave", "ripple" };
63 static char *mode_list_text[] = { N_("Wave"), N_("Ripple") };
66 set_description( _("Distort video filter") );
67 set_shortname( N_( "Distortion" ));
68 set_capability( "video filter", 0 );
69 set_category( CAT_VIDEO );
70 set_subcategory( SUBCAT_VIDEO_VFILTER );
72 add_string( "distort-mode", "wave", NULL, MODE_TEXT, MODE_LONGTEXT,
74 change_string_list( mode_list, mode_list_text, 0 );
76 add_shortcut( "distort" );
77 set_callbacks( Create, Destroy );
80 /*****************************************************************************
81 * vout_sys_t: Distort video output method descriptor
82 *****************************************************************************
83 * This structure is part of the video output thread descriptor.
84 * It describes the Distort specific properties of an output thread.
85 *****************************************************************************/
89 vout_thread_t *p_vout;
91 /* For the wave mode */
96 /*****************************************************************************
97 * Control: control facility for the vout (forwards to child vout)
98 *****************************************************************************/
99 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
101 return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
104 /*****************************************************************************
105 * Create: allocates Distort video thread output method
106 *****************************************************************************
107 * This function allocates and initializes a Distort vout method.
108 *****************************************************************************/
109 static int Create( vlc_object_t *p_this )
111 vout_thread_t *p_vout = (vout_thread_t *)p_this;
112 char *psz_method, *psz_method_tmp;
114 /* Allocate structure */
115 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
116 if( p_vout->p_sys == NULL )
118 msg_Err( p_vout, "out of memory" );
122 p_vout->pf_init = Init;
123 p_vout->pf_end = End;
124 p_vout->pf_manage = NULL;
125 p_vout->pf_render = Render;
126 p_vout->pf_display = NULL;
127 p_vout->pf_control = Control;
129 p_vout->p_sys->i_mode = 0;
131 if( !(psz_method = psz_method_tmp
132 = config_GetPsz( p_vout, "distort-mode" )) )
134 msg_Err( p_vout, "configuration variable %s empty, using 'wave'",
136 p_vout->p_sys->i_mode = DISTORT_MODE_WAVE;
141 if( !strcmp( psz_method, "wave" ) )
143 p_vout->p_sys->i_mode = DISTORT_MODE_WAVE;
145 else if( !strcmp( psz_method, "ripple" ) )
147 p_vout->p_sys->i_mode = DISTORT_MODE_RIPPLE;
151 msg_Err( p_vout, "no valid distort mode provided, "
153 p_vout->p_sys->i_mode = DISTORT_MODE_WAVE;
156 free( psz_method_tmp );
161 /*****************************************************************************
162 * Init: initialize Distort video thread output method
163 *****************************************************************************/
164 static int Init( vout_thread_t *p_vout )
168 video_format_t fmt = {0};
170 I_OUTPUTPICTURES = 0;
172 /* Initialize the output structure */
173 p_vout->output.i_chroma = p_vout->render.i_chroma;
174 p_vout->output.i_width = p_vout->render.i_width;
175 p_vout->output.i_height = p_vout->render.i_height;
176 p_vout->output.i_aspect = p_vout->render.i_aspect;
177 p_vout->fmt_out = p_vout->fmt_in;
178 fmt = p_vout->fmt_out;
180 /* Try to open the real video output */
181 msg_Dbg( p_vout, "spawning the real video output" );
183 p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
185 /* Everything failed */
186 if( p_vout->p_sys->p_vout == NULL )
188 msg_Err( p_vout, "cannot open vout, aborting" );
192 ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
194 ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
196 ADD_PARENT_CALLBACKS( SendEventsToChild );
198 p_vout->p_sys->f_angle = 0.0;
199 p_vout->p_sys->last_date = 0;
204 /*****************************************************************************
205 * End: terminate Distort video thread output method
206 *****************************************************************************/
207 static void End( vout_thread_t *p_vout )
211 /* Free the fake output buffers we allocated */
212 for( i_index = I_OUTPUTPICTURES ; i_index ; )
215 free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
219 /*****************************************************************************
220 * Destroy: destroy Distort video thread output method
221 *****************************************************************************
222 * Terminate an output method created by DistortCreateOutputMethod
223 *****************************************************************************/
224 static void Destroy( vlc_object_t *p_this )
226 vout_thread_t *p_vout = (vout_thread_t *)p_this;
228 if( p_vout->p_sys->p_vout )
230 DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
231 vlc_object_detach( p_vout->p_sys->p_vout );
232 vout_Destroy( p_vout->p_sys->p_vout );
235 DEL_PARENT_CALLBACKS( SendEventsToChild );
237 free( p_vout->p_sys );
240 /*****************************************************************************
241 * Render: displays previously rendered output
242 *****************************************************************************
243 * This function send the currently rendered image to Distort image, waits
244 * until it is displayed and switch the two rendering buffers, preparing next
246 *****************************************************************************/
247 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
251 /* This is a new frame. Get a structure from the video_output. */
252 while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
255 if( p_vout->b_die || p_vout->b_error )
259 msleep( VOUT_OUTMEM_SLEEP );
262 vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
264 switch( p_vout->p_sys->i_mode )
266 case DISTORT_MODE_WAVE:
267 DistortWave( p_vout, p_pic, p_outpic );
270 case DISTORT_MODE_RIPPLE:
271 DistortRipple( p_vout, p_pic, p_outpic );
278 vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
281 /*****************************************************************************
282 * DistortWave: draw a wave effect on the picture
283 *****************************************************************************/
284 static void DistortWave( vout_thread_t *p_vout, picture_t *p_inpic,
285 picture_t *p_outpic )
289 mtime_t new_date = mdate();
291 p_vout->p_sys->f_angle += (new_date - p_vout->p_sys->last_date) / 200000.0;
292 p_vout->p_sys->last_date = new_date;
293 f_angle = p_vout->p_sys->f_angle;
295 for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
297 int i_line, i_num_lines, i_offset;
299 uint8_t *p_in, *p_out;
301 p_in = p_inpic->p[i_index].p_pixels;
302 p_out = p_outpic->p[i_index].p_pixels;
304 i_num_lines = p_inpic->p[i_index].i_visible_lines;
306 black_pixel = ( i_index == Y_PLANE ) ? 0x00 : 0x80;
308 /* Ok, we do 3 times the sin() calculation for each line. So what ? */
309 for( i_line = 0 ; i_line < i_num_lines ; i_line++ )
311 /* Calculate today's offset, don't go above 1/20th of the screen */
312 i_offset = (int)( (double)(p_inpic->p[i_index].i_visible_pitch)
313 * sin( f_angle + 10.0 * (double)i_line
314 / (double)i_num_lines )
321 p_vout->p_vlc->pf_memcpy( p_out, p_in - i_offset,
322 p_inpic->p[i_index].i_visible_pitch + i_offset );
323 p_in += p_inpic->p[i_index].i_pitch;
324 p_out += p_outpic->p[i_index].i_pitch;
325 memset( p_out + i_offset, black_pixel, -i_offset );
329 p_vout->p_vlc->pf_memcpy( p_out + i_offset, p_in,
330 p_inpic->p[i_index].i_visible_pitch - i_offset );
331 memset( p_out, black_pixel, i_offset );
332 p_in += p_inpic->p[i_index].i_pitch;
333 p_out += p_outpic->p[i_index].i_pitch;
338 p_vout->p_vlc->pf_memcpy( p_out, p_in,
339 p_inpic->p[i_index].i_visible_pitch );
340 p_in += p_inpic->p[i_index].i_pitch;
341 p_out += p_outpic->p[i_index].i_pitch;
348 /*****************************************************************************
349 * DistortRipple: draw a ripple effect at the bottom of the picture
350 *****************************************************************************/
351 static void DistortRipple( vout_thread_t *p_vout, picture_t *p_inpic,
352 picture_t *p_outpic )
356 mtime_t new_date = mdate();
358 p_vout->p_sys->f_angle -= (p_vout->p_sys->last_date - new_date) / 100000.0;
359 p_vout->p_sys->last_date = new_date;
360 f_angle = p_vout->p_sys->f_angle;
362 for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
364 int i_line, i_first_line, i_num_lines, i_offset;
366 uint8_t *p_in, *p_out;
368 black_pixel = ( i_index == Y_PLANE ) ? 0x00 : 0x80;
370 i_num_lines = p_inpic->p[i_index].i_visible_lines;
372 i_first_line = i_num_lines * 4 / 5;
374 p_in = p_inpic->p[i_index].p_pixels;
375 p_out = p_outpic->p[i_index].p_pixels;
377 for( i_line = 0 ; i_line < i_first_line ; i_line++ )
379 p_vout->p_vlc->pf_memcpy( p_out, p_in,
380 p_inpic->p[i_index].i_visible_pitch );
381 p_in += p_inpic->p[i_index].i_pitch;
382 p_out += p_outpic->p[i_index].i_pitch;
385 /* Ok, we do 3 times the sin() calculation for each line. So what ? */
386 for( i_line = i_first_line ; i_line < i_num_lines ; i_line++ )
388 /* Calculate today's offset, don't go above 1/20th of the screen */
389 i_offset = (int)( (double)(p_inpic->p[i_index].i_pitch)
390 * sin( f_angle + 2.0 * (double)i_line
391 / (double)( 1 + i_line
393 * (double)(i_line - i_first_line)
394 / (double)i_num_lines
401 p_vout->p_vlc->pf_memcpy( p_out, p_in - i_offset,
402 p_inpic->p[i_index].i_visible_pitch + i_offset );
403 p_in -= p_inpic->p[i_index].i_pitch;
404 p_out += p_outpic->p[i_index].i_pitch;
405 memset( p_out + i_offset, black_pixel, -i_offset );
409 p_vout->p_vlc->pf_memcpy( p_out + i_offset, p_in,
410 p_inpic->p[i_index].i_visible_pitch - i_offset );
411 memset( p_out, black_pixel, i_offset );
412 p_in -= p_inpic->p[i_index].i_pitch;
413 p_out += p_outpic->p[i_index].i_pitch;
418 p_vout->p_vlc->pf_memcpy( p_out, p_in,
419 p_inpic->p[i_index].i_visible_pitch );
420 p_in -= p_inpic->p[i_index].i_pitch;
421 p_out += p_outpic->p[i_index].i_pitch;
428 /*****************************************************************************
429 * SendEvents: forward mouse and keyboard events to the parent p_vout
430 *****************************************************************************/
431 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
432 vlc_value_t oldval, vlc_value_t newval, void *p_data )
434 var_Set( (vlc_object_t *)p_data, psz_var, newval );
439 /*****************************************************************************
440 * SendEventsToChild: forward events to the child/children vout
441 *****************************************************************************/
442 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
443 vlc_value_t oldval, vlc_value_t newval, void *p_data )
445 vout_thread_t *p_vout = (vout_thread_t *)p_this;
446 var_Set( p_vout->p_sys->p_vout, psz_var, newval );