1 /*****************************************************************************
2 * rotate.c : video rotation filter
3 *****************************************************************************
4 * Copyright (C) 2000-2006 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 *****************************************************************************/
28 #include <math.h> /* sin(), cos() */
37 #include "vlc_filter.h"
39 /*****************************************************************************
41 *****************************************************************************/
42 static int Create ( vlc_object_t * );
43 static void Destroy ( vlc_object_t * );
45 static picture_t *Filter( filter_t *, picture_t * );
47 static int RotateCallback( vlc_object_t *p_this, char const *psz_var,
48 vlc_value_t oldval, vlc_value_t newval,
51 static int PreciseRotateCallback( vlc_object_t *p_this, char const *psz_var,
52 vlc_value_t oldval, vlc_value_t newval,
55 #define ANGLE_TEXT N_("Angle in degrees")
56 #define ANGLE_LONGTEXT N_("Angle in degrees (0 to 359)")
58 #define FILTER_PREFIX "rotate-"
60 /*****************************************************************************
62 *****************************************************************************/
64 set_description( _("Rotate video filter") );
65 set_shortname( _( "Rotate" ));
66 set_capability( "video filter2", 0 );
67 set_category( CAT_VIDEO );
68 set_subcategory( SUBCAT_VIDEO_VFILTER );
70 add_integer_with_range( FILTER_PREFIX "angle", 30, 0, 359, NULL,
71 ANGLE_TEXT, ANGLE_LONGTEXT, VLC_FALSE );
73 add_shortcut( "rotate" );
74 set_callbacks( Create, Destroy );
77 static const char *ppsz_filter_options[] = {
81 /*****************************************************************************
83 *****************************************************************************/
91 static inline void cache_trigo( int i_angle, int *i_sin, int *i_cos )
93 const double f_angle = (((double)i_angle)*M_PI)/1800.;
94 *i_sin = (int)(sin( f_angle )*4096.);
95 *i_cos = (int)(cos( f_angle )*4096.);
98 /*****************************************************************************
99 * Create: allocates Distort video filter
100 *****************************************************************************/
101 static int Create( vlc_object_t *p_this )
103 filter_t *p_filter = (filter_t *)p_this;
106 if( p_filter->fmt_in.video.i_chroma != VLC_FOURCC('I','4','2','0')
107 && p_filter->fmt_in.video.i_chroma != VLC_FOURCC('I','Y','U','V')
108 && p_filter->fmt_in.video.i_chroma != VLC_FOURCC('J','4','2','0')
109 && p_filter->fmt_in.video.i_chroma != VLC_FOURCC('Y','V','1','2')
111 && p_filter->fmt_in.video.i_chroma != VLC_FOURCC('I','4','2','2')
112 && p_filter->fmt_in.video.i_chroma != VLC_FOURCC('J','4','2','2')
115 /* We only want planar YUV 4:2:0 or 4:2:2 */
116 msg_Err( p_filter, "Unsupported input chroma (%4s)",
117 (char*)&(p_filter->fmt_in.video.i_chroma) );
121 if( p_filter->fmt_in.video.i_chroma != p_filter->fmt_out.video.i_chroma )
123 msg_Err( p_filter, "Input and output chromas don't match" );
127 /* Allocate structure */
128 p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
129 if( p_filter->p_sys == NULL )
131 msg_Err( p_filter, "out of memory" );
134 p_sys = p_filter->p_sys;
136 config_ChainParse( p_filter, FILTER_PREFIX, ppsz_filter_options,
139 p_sys->i_angle = var_CreateGetIntegerCommand( p_filter,
140 FILTER_PREFIX "angle" ) * 10;
141 var_Create( p_filter, FILTER_PREFIX "deciangle",
142 VLC_VAR_INTEGER|VLC_VAR_ISCOMMAND );
143 var_AddCallback( p_filter, FILTER_PREFIX "angle", RotateCallback, p_sys );
144 var_AddCallback( p_filter, FILTER_PREFIX "deciangle",
145 PreciseRotateCallback, p_sys );
147 cache_trigo( p_sys->i_angle, &p_sys->i_sin, &p_sys->i_cos );
149 p_filter->pf_video_filter = Filter;
154 /*****************************************************************************
155 * Destroy: destroy Distort filter
156 *****************************************************************************/
157 static void Destroy( vlc_object_t *p_this )
159 filter_t *p_filter = (filter_t *)p_this;
161 free( p_filter->p_sys );
164 /*****************************************************************************
166 *****************************************************************************/
167 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
170 filter_sys_t *p_sys = p_filter->p_sys;
172 const int i_sin = p_sys->i_sin, i_cos = p_sys->i_cos;
174 if( !p_pic ) return NULL;
176 p_outpic = p_filter->pf_vout_buffer_new( p_filter );
179 msg_Warn( p_filter, "can't get output picture" );
180 if( p_pic->pf_release )
181 p_pic->pf_release( p_pic );
185 for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
187 const int i_visible_lines = p_pic->p[i_plane].i_visible_lines;
188 const int i_visible_pitch = p_pic->p[i_plane].i_visible_pitch;
189 const int i_pitch = p_pic->p[i_plane].i_pitch;
190 const int i_hidden_pitch = i_pitch - i_visible_pitch;
192 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 );
193 /* = 2 for U and V planes in YUV 4:2:2, = 1 otherwise */
195 const int i_line_center = i_visible_lines>>1;
196 const int i_col_center = i_visible_pitch>>1;
198 const uint8_t *p_in = p_pic->p[i_plane].p_pixels;
199 uint8_t *p_out = p_outpic->p[i_plane].p_pixels;
200 uint8_t *p_outendline = p_out + i_visible_pitch;
201 const uint8_t *p_outend = p_out + i_visible_lines * i_pitch;
203 const uint8_t black_pixel = ( i_plane == Y_PLANE ) ? 0x00 : 0x80;
205 const int i_line_next = i_cos / i_aspect -i_sin*i_visible_pitch;
206 const int i_col_next = -i_sin / i_aspect -i_cos*i_visible_pitch;
207 int i_line_orig0 = ( - i_cos * i_line_center / i_aspect
208 - i_sin * i_col_center + (1<<11) );
209 int i_col_orig0 = i_sin * i_line_center / i_aspect
210 - i_cos * i_col_center + (1<<11);
211 for( ; p_outendline < p_outend;
212 p_out += i_hidden_pitch, p_outendline += i_pitch,
213 i_line_orig0 += i_line_next, i_col_orig0 += i_col_next )
215 for( ; p_out < p_outendline;
216 p_out++, i_line_orig0 += i_sin, i_col_orig0 += i_cos )
218 const int i_line_orig = (i_line_orig0>>12)*i_aspect + i_line_center;
219 const int i_col_orig = (i_col_orig0>>12) + i_col_center;
220 const uint8_t* p_orig_offset = p_in + i_line_orig * i_pitch
222 const uint8_t i_line_percent = (i_line_orig0>>4) & 255;
223 const uint8_t i_col_percent = (i_col_orig0 >>4) & 255;
225 if( -1 <= i_line_orig && i_line_orig < i_visible_lines
226 && -1 <= i_col_orig && i_col_orig < i_visible_pitch )
231 if( ( i_col_orig > i_visible_pitch/2 ) )
234 uint8_t i_curpix = black_pixel;
235 uint8_t i_colpix = black_pixel;
236 uint8_t i_linpix = black_pixel;
237 uint8_t i_nexpix = black_pixel;
238 if( ( 0 <= i_line_orig ) && ( 0 <= i_col_orig ) )
239 i_curpix = *p_orig_offset;
242 if( ( i_col_orig < i_visible_pitch - 1)
243 && ( i_line_orig >= 0 ) )
244 i_colpix = *p_orig_offset;
246 p_orig_offset+=i_pitch;
247 if( ( i_line_orig < i_visible_lines - 1)
248 && ( i_col_orig < i_visible_pitch - 1) )
249 i_nexpix = *p_orig_offset;
252 if( ( i_line_orig < i_visible_lines - 1)
253 && ( i_col_orig >= 0 ) )
254 i_linpix = *p_orig_offset;
256 unsigned int temp = 0;
258 (256 - i_line_percent) * ( 256 - i_col_percent );
260 i_line_percent * (256 - i_col_percent );
262 ( i_col_percent) * ( i_line_percent);
264 i_col_percent * (256 - i_line_percent );
268 else if (i_col_orig == i_visible_pitch/2 )
269 { *p_out = black_pixel;
272 *p_out = *p_orig_offset;
278 *p_out = black_pixel;
284 p_outpic->date = p_pic->date;
285 p_outpic->b_force = p_pic->b_force;
286 p_outpic->i_nb_fields = p_pic->i_nb_fields;
287 p_outpic->b_progressive = p_pic->b_progressive;
288 p_outpic->b_top_field_first = p_pic->b_top_field_first;
290 if( p_pic->pf_release )
291 p_pic->pf_release( p_pic );
296 /*****************************************************************************
297 * Angle modification callbacks.
298 *****************************************************************************/
299 static int RotateCallback( vlc_object_t *p_this, char const *psz_var,
300 vlc_value_t oldval, vlc_value_t newval,
303 VLC_UNUSED(p_this); VLC_UNUSED(psz_var); VLC_UNUSED(oldval);
304 filter_sys_t *p_sys = (filter_sys_t *)p_data;
305 p_sys->i_angle = newval.i_int*10;
306 cache_trigo( p_sys->i_angle, &p_sys->i_sin, &p_sys->i_cos );
310 static int PreciseRotateCallback( vlc_object_t *p_this, char const *psz_var,
311 vlc_value_t oldval, vlc_value_t newval,
314 VLC_UNUSED(p_this); VLC_UNUSED(psz_var); VLC_UNUSED(oldval);
315 filter_sys_t *p_sys = (filter_sys_t *)p_data;
316 p_sys->i_angle = newval.i_int;
317 cache_trigo( p_sys->i_angle, &p_sys->i_sin, &p_sys->i_cos );