1 /*****************************************************************************
2 * rotate.c : video rotation filter
3 *****************************************************************************
4 * Copyright (C) 2000-2008 the VideoLAN team
7 * Authors: Antoine Cellerier <dionoea -at- videolan -dot- 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <math.h> /* sin(), cos() */
34 #include <vlc_common.h>
35 #include <vlc_plugin.h>
37 #include "vlc_filter.h"
38 #include "filter_picture.h"
40 /*****************************************************************************
42 *****************************************************************************/
43 static int Create ( vlc_object_t * );
44 static void Destroy ( vlc_object_t * );
46 static picture_t *Filter( filter_t *, picture_t * );
47 static picture_t *FilterPacked( filter_t *, picture_t * );
49 static int RotateCallback( vlc_object_t *p_this, char const *psz_var,
50 vlc_value_t oldval, vlc_value_t newval,
53 static int PreciseRotateCallback( vlc_object_t *p_this, char const *psz_var,
54 vlc_value_t oldval, vlc_value_t newval,
57 #define ANGLE_TEXT N_("Angle in degrees")
58 #define ANGLE_LONGTEXT N_("Angle in degrees (0 to 359)")
60 #define FILTER_PREFIX "rotate-"
62 /*****************************************************************************
64 *****************************************************************************/
66 set_description( N_("Rotate video filter") )
67 set_shortname( N_( "Rotate" ))
68 set_capability( "video filter2", 0 )
69 set_category( CAT_VIDEO )
70 set_subcategory( SUBCAT_VIDEO_VFILTER )
72 add_integer_with_range( FILTER_PREFIX "angle", 30, 0, 359, NULL,
73 ANGLE_TEXT, ANGLE_LONGTEXT, false )
75 add_shortcut( "rotate" )
76 set_callbacks( Create, Destroy )
79 static const char *const ppsz_filter_options[] = {
83 /*****************************************************************************
85 *****************************************************************************/
93 static inline void cache_trigo( int i_angle, int *i_sin, int *i_cos )
95 const double f_angle = (((double)i_angle)*M_PI)/1800.;
96 *i_sin = (int)(sin( f_angle )*4096.);
97 *i_cos = (int)(cos( f_angle )*4096.);
100 /*****************************************************************************
101 * Create: allocates Distort video filter
102 *****************************************************************************/
103 static int Create( vlc_object_t *p_this )
105 filter_t *p_filter = (filter_t *)p_this;
108 if( p_filter->fmt_in.video.i_chroma != p_filter->fmt_out.video.i_chroma )
110 msg_Err( p_filter, "Input and output chromas don't match" );
114 switch( p_filter->fmt_in.video.i_chroma )
117 p_filter->pf_video_filter = Filter;
121 p_filter->pf_video_filter = FilterPacked;
125 msg_Err( p_filter, "Unsupported input chroma (%4s)",
126 (char*)&(p_filter->fmt_in.video.i_chroma) );
130 /* Allocate structure */
131 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
132 if( p_filter->p_sys == NULL )
134 p_sys = p_filter->p_sys;
136 config_ChainParse( p_filter, FILTER_PREFIX, ppsz_filter_options,
139 int i_angle = var_CreateGetIntegerCommand( p_filter,
140 FILTER_PREFIX "angle" ) * 10;
141 cache_trigo( i_angle, &p_sys->i_sin, &p_sys->i_cos );
142 var_Create( p_filter, FILTER_PREFIX "deciangle",
143 VLC_VAR_INTEGER|VLC_VAR_ISCOMMAND );
144 vlc_spin_init( &p_sys->lock );
145 var_AddCallback( p_filter, FILTER_PREFIX "angle", RotateCallback, p_sys );
146 var_AddCallback( p_filter, FILTER_PREFIX "deciangle",
147 PreciseRotateCallback, p_sys );
153 /*****************************************************************************
154 * Destroy: destroy Distort filter
155 *****************************************************************************/
156 static void Destroy( vlc_object_t *p_this )
158 filter_t *p_filter = (filter_t *)p_this;
160 var_DelCallback( p_filter, FILTER_PREFIX "angle", RotateCallback, p_filter->p_sys );
161 var_DelCallback( p_filter, FILTER_PREFIX "deciangle",
162 PreciseRotateCallback, p_filter->p_sys );
163 vlc_spin_destroy( &p_filter->p_sys->lock );
164 free( p_filter->p_sys );
167 /*****************************************************************************
169 *****************************************************************************/
170 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
173 filter_sys_t *p_sys = p_filter->p_sys;
176 if( !p_pic ) return NULL;
178 p_outpic = filter_NewPicture( p_filter );
181 picture_Release( p_pic );
185 vlc_spin_lock( &p_sys->lock );
186 i_sin = p_sys->i_sin;
187 i_cos = p_sys->i_cos;
188 vlc_spin_unlock( &p_sys->lock );
190 for( int i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
192 const int i_visible_lines = p_pic->p[i_plane].i_visible_lines;
193 const int i_visible_pitch = p_pic->p[i_plane].i_visible_pitch;
194 const int i_pitch = p_pic->p[i_plane].i_pitch;
195 const int i_hidden_pitch = i_pitch - i_visible_pitch;
197 const int i_aspect = ( i_visible_lines * p_pic->p[Y_PLANE].i_visible_pitch ) / ( p_pic->p[Y_PLANE].i_visible_lines * i_visible_pitch );
198 /* = 2 for U and V planes in YUV 4:2:2, = 1 otherwise */
200 const int i_line_center = i_visible_lines>>1;
201 const int i_col_center = i_visible_pitch>>1;
203 const uint8_t *p_in = p_pic->p[i_plane].p_pixels;
204 uint8_t *p_out = p_outpic->p[i_plane].p_pixels;
205 uint8_t *p_outendline = p_out + i_visible_pitch;
206 const uint8_t *p_outend = p_out + i_visible_lines * i_pitch;
208 const uint8_t black_pixel = ( i_plane == Y_PLANE ) ? 0x00 : 0x80;
210 const int i_line_next = i_cos / i_aspect -i_sin*i_visible_pitch;
211 const int i_col_next = -i_sin / i_aspect -i_cos*i_visible_pitch;
212 int i_line_orig0 = ( - i_cos * i_line_center / i_aspect
213 - i_sin * i_col_center + (1<<11) );
214 int i_col_orig0 = i_sin * i_line_center / i_aspect
215 - i_cos * i_col_center + (1<<11);
216 for( ; p_outendline < p_outend;
217 p_out += i_hidden_pitch, p_outendline += i_pitch,
218 i_line_orig0 += i_line_next, i_col_orig0 += i_col_next )
220 for( ; p_out < p_outendline;
221 p_out++, i_line_orig0 += i_sin, i_col_orig0 += i_cos )
223 const int i_line_orig = (i_line_orig0>>12)*i_aspect + i_line_center;
224 const int i_col_orig = (i_col_orig0>>12) + i_col_center;
225 const uint8_t* p_orig_offset = p_in + i_line_orig * i_pitch
227 const uint8_t i_line_percent = (i_line_orig0>>4) & 255;
228 const uint8_t i_col_percent = (i_col_orig0 >>4) & 255;
230 if( -1 <= i_line_orig && i_line_orig < i_visible_lines
231 && -1 <= i_col_orig && i_col_orig < i_visible_pitch )
236 if( ( i_col_orig > i_visible_pitch/2 ) )
239 uint8_t i_curpix = black_pixel;
240 uint8_t i_colpix = black_pixel;
241 uint8_t i_linpix = black_pixel;
242 uint8_t i_nexpix = black_pixel;
243 if( ( 0 <= i_line_orig ) && ( 0 <= i_col_orig ) )
244 i_curpix = *p_orig_offset;
247 if( ( i_col_orig < i_visible_pitch - 1)
248 && ( i_line_orig >= 0 ) )
249 i_colpix = *p_orig_offset;
251 p_orig_offset+=i_pitch;
252 if( ( i_line_orig < i_visible_lines - 1)
253 && ( i_col_orig < i_visible_pitch - 1) )
254 i_nexpix = *p_orig_offset;
257 if( ( i_line_orig < i_visible_lines - 1)
258 && ( i_col_orig >= 0 ) )
259 i_linpix = *p_orig_offset;
261 unsigned int temp = 0;
263 (256 - i_line_percent) * ( 256 - i_col_percent );
265 i_line_percent * (256 - i_col_percent );
267 ( i_col_percent) * ( i_line_percent);
269 i_col_percent * (256 - i_line_percent );
273 else if (i_col_orig == i_visible_pitch/2 )
274 { *p_out = black_pixel;
277 *p_out = *p_orig_offset;
283 *p_out = black_pixel;
289 return CopyInfoAndRelease( p_outpic, p_pic );
292 /*****************************************************************************
294 *****************************************************************************/
295 static picture_t *FilterPacked( filter_t *p_filter, picture_t *p_pic )
298 filter_sys_t *p_sys = p_filter->p_sys;
299 const int i_sin = p_sys->i_sin, i_cos = p_sys->i_cos;
301 if( !p_pic ) return NULL;
303 int i_u_offset, i_v_offset, i_y_offset;
305 if( GetPackedYuvOffsets( p_pic->format.i_chroma, &i_y_offset,
306 &i_u_offset, &i_v_offset ) != VLC_SUCCESS )
308 msg_Warn( p_filter, "Unsupported input chroma (%4s)",
309 (char*)&(p_pic->format.i_chroma) );
310 picture_Release( p_pic );
314 p_outpic = filter_NewPicture( p_filter );
317 picture_Release( p_pic );
321 const uint8_t *p_in = p_pic->p->p_pixels+i_y_offset;
322 const uint8_t *p_in_u = p_pic->p->p_pixels+i_u_offset;
323 const uint8_t *p_in_v = p_pic->p->p_pixels+i_v_offset;
325 const int i_pitch = p_pic->p->i_pitch;
326 const int i_visible_pitch = p_pic->p->i_visible_pitch>>1; /* In fact it's i_visible_pixels */
327 const int i_visible_lines = p_pic->p->i_visible_lines;
329 uint8_t *p_out = p_outpic->p->p_pixels+i_y_offset;
330 uint8_t *p_out_u = p_outpic->p->p_pixels+i_u_offset;
331 uint8_t *p_out_v = p_outpic->p->p_pixels+i_v_offset;
333 const int i_line_center = i_visible_lines>>1;
334 const int i_col_center = i_visible_pitch>>1;
337 for( i_line = 0; i_line < i_visible_lines; i_line++ )
339 for( i_col = 0; i_col < i_visible_pitch; i_col++ )
343 /* Handle "1st Y", U and V */
344 i_line_orig = i_line_center +
345 ( ( i_sin * ( i_col - i_col_center )
346 + i_cos * ( i_line - i_line_center ) )>>12 );
347 i_col_orig = i_col_center +
348 ( ( i_cos * ( i_col - i_col_center )
349 - i_sin * ( i_line - i_line_center ) )>>12 );
350 if( 0 <= i_col_orig && i_col_orig < i_visible_pitch
351 && 0 <= i_line_orig && i_line_orig < i_visible_lines )
353 p_out[i_line*i_pitch+2*i_col] = p_in[i_line_orig*i_pitch+2*i_col_orig];
355 p_out_u[i_line*i_pitch+2*i_col] = p_in_u[i_line_orig*i_pitch+4*i_col_orig];
356 p_out_v[i_line*i_pitch+2*i_col] = p_in_v[i_line_orig*i_pitch+4*i_col_orig];
360 p_out[i_line*i_pitch+2*i_col] = 0x00;
361 p_out_u[i_line*i_pitch+2*i_col] = 0x80;
362 p_out_v[i_line*i_pitch+2*i_col] = 0x80;
367 if( i_col >= i_visible_pitch )
370 i_line_orig = i_line_center +
371 ( ( i_sin * ( i_col - i_col_center )
372 + i_cos * ( i_line - i_line_center ) )>>12 );
373 i_col_orig = i_col_center +
374 ( ( i_cos * ( i_col - i_col_center )
375 - i_sin * ( i_line - i_line_center ) )>>12 );
376 if( 0 <= i_col_orig && i_col_orig < i_visible_pitch
377 && 0 <= i_line_orig && i_line_orig < i_visible_lines )
379 p_out[i_line*i_pitch+2*i_col] = p_in[i_line_orig*i_pitch+2*i_col_orig];
383 p_out[i_line*i_pitch+2*i_col] = 0x00;
388 return CopyInfoAndRelease( p_outpic, p_pic );
391 /*****************************************************************************
392 * Angle modification callbacks.
393 *****************************************************************************/
394 static int RotateCallback( vlc_object_t *p_this, char const *psz_var,
395 vlc_value_t oldval, vlc_value_t newval,
400 return PreciseRotateCallback( p_this, psz_var, oldval, newval, p_data );
403 static int PreciseRotateCallback( vlc_object_t *p_this, char const *psz_var,
404 vlc_value_t oldval, vlc_value_t newval,
407 VLC_UNUSED(p_this); VLC_UNUSED(psz_var); VLC_UNUSED(oldval);
408 filter_sys_t *p_sys = (filter_sys_t *)p_data;
411 cache_trigo( newval.i_int, &i_sin, &i_cos );
412 vlc_spin_lock( &p_sys->lock );
413 p_sys->i_sin = i_sin;
414 p_sys->i_cos = i_cos;
415 vlc_spin_unlock( &p_sys->lock );