modules/video_filter/rotate.c

   1 /*****************************************************************************
   2  * rotate.c : video rotation filter
   3  *****************************************************************************
   4  * Copyright (C) 2000-2008 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea -at- videolan -dot- org>
   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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <math.h>                                            /* sin(), cos() */
  33
  34 #include <vlc_common.h>
  35 #include <vlc_plugin.h>
  36 #include <vlc_atomic.h>
  37 #include <vlc_filter.h>
  38 #include "filter_picture.h"
  39 #include "../control/motionlib.h"
  40
  41 /*****************************************************************************
  42  * Local prototypes
  43  *****************************************************************************/
  44 static int  Create    ( vlc_object_t * );
  45 static void Destroy   ( vlc_object_t * );
  46
  47 static picture_t *Filter( filter_t *, picture_t * );
  48 static picture_t *FilterPacked( filter_t *, picture_t * );
  49
  50 static int RotateCallback( vlc_object_t *p_this, char const *psz_var,
  51                            vlc_value_t oldval, vlc_value_t newval,
  52                            void *p_data );
  53
  54 #define ANGLE_TEXT N_("Angle in degrees")
  55 #define ANGLE_LONGTEXT N_("Angle in degrees (0 to 359)")
  56 #define MOTION_TEXT N_("Use motion sensors")
  57 #define MOTION_LONGTEXT N_("Use HDAPS, AMS, APPLESMC or UNIMOTION motion " \
  58     "sensors to rotate the video")
  59
  60 #define FILTER_PREFIX "rotate-"
  61
  62 /*****************************************************************************
  63  * Module descriptor
  64  *****************************************************************************/
  65 vlc_module_begin ()
  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 )
  71
  72     add_float( FILTER_PREFIX "angle", 30., ANGLE_TEXT, ANGLE_LONGTEXT, false )
  73     add_bool( FILTER_PREFIX "use-motion", false, MOTION_TEXT,
  74               MOTION_LONGTEXT, false )
  75
  76     add_shortcut( "rotate" )
  77     set_callbacks( Create, Destroy )
  78 vlc_module_end ()
  79
  80 static const char *const ppsz_filter_options[] = {
  81     "angle", "use-motion", NULL
  82 };
  83
  84 /*****************************************************************************
  85  * filter_sys_t
  86  *****************************************************************************/
  87 struct filter_sys_t
  88 {
  89     atomic_uint_fast32_t sincos;
  90     motion_sensors_t *p_motion;
  91 };
  92
  93 static void store_trigo( struct filter_sys_t *sys, float f_angle )
  94 {
  95     f_angle *= M_PI / 180.f; /* degrees -> radians */
  96
  97     uint16_t i_sin = lroundf(sinf(f_angle) * 4096.f);
  98     uint16_t i_cos = lroundf(cosf(f_angle) * 4096.f);
  99     atomic_store( &sys->sincos, (i_cos << 16) | (i_sin << 0));
 100 }
 101
 102 static void fetch_trigo( struct filter_sys_t *sys, int *i_sin, int *i_cos )
 103 {
 104     uint32_t sincos = atomic_load( &sys->sincos );
 105
 106     *i_sin = (int16_t)(sincos & 0xFFFF);
 107     *i_cos = (int16_t)(sincos >> 16);
 108 }
 109
 110 /*****************************************************************************
 111  * Create: allocates Distort video filter
 112  *****************************************************************************/
 113 static int Create( vlc_object_t *p_this )
 114 {
 115     filter_t *p_filter = (filter_t *)p_this;
 116     filter_sys_t *p_sys;
 117
 118     if( p_filter->fmt_in.video.i_chroma != p_filter->fmt_out.video.i_chroma )
 119     {
 120         msg_Err( p_filter, "Input and output chromas don't match" );
 121         return VLC_EGENERIC;
 122     }
 123
 124     switch( p_filter->fmt_in.video.i_chroma )
 125     {
 126         CASE_PLANAR_YUV
 127             p_filter->pf_video_filter = Filter;
 128             break;
 129
 130         CASE_PACKED_YUV_422
 131             p_filter->pf_video_filter = FilterPacked;
 132             break;
 133
 134         default:
 135             msg_Err( p_filter, "Unsupported input chroma (%4.4s)",
 136                      (char*)&(p_filter->fmt_in.video.i_chroma) );
 137             return VLC_EGENERIC;
 138     }
 139
 140     /* Allocate structure */
 141     p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
 142     if( p_filter->p_sys == NULL )
 143         return VLC_ENOMEM;
 144     p_sys = p_filter->p_sys;
 145
 146     config_ChainParse( p_filter, FILTER_PREFIX, ppsz_filter_options,
 147                        p_filter->p_cfg );
 148
 149     if( var_InheritBool( p_filter, FILTER_PREFIX "use-motion" ) )
 150     {
 151         p_sys->p_motion = motion_create( VLC_OBJECT( p_filter ) );
 152         if( p_sys->p_motion == NULL )
 153         {
 154             free( p_sys );
 155             return VLC_EGENERIC;
 156         }
 157     }
 158     else
 159     {
 160         float f_angle = var_CreateGetFloatCommand( p_filter,
 161                                                    FILTER_PREFIX "angle" );
 162         store_trigo( p_sys, f_angle );
 163         var_AddCallback( p_filter, FILTER_PREFIX "angle",
 164                          RotateCallback, p_sys );
 165         p_sys->p_motion = NULL;
 166     }
 167
 168     return VLC_SUCCESS;
 169 }
 170
 171 /*****************************************************************************
 172  * Destroy: destroy Distort filter
 173  *****************************************************************************/
 174 static void Destroy( vlc_object_t *p_this )
 175 {
 176     filter_t *p_filter = (filter_t *)p_this;
 177     filter_sys_t *p_sys = p_filter->p_sys;
 178
 179     if( p_sys->p_motion != NULL )
 180         motion_destroy( p_sys->p_motion );
 181     else
 182     {
 183         var_DelCallback( p_filter, FILTER_PREFIX "angle",
 184                          RotateCallback, p_sys );
 185     }
 186     free( p_sys );
 187 }
 188
 189 /*****************************************************************************
 190  *
 191  *****************************************************************************/
 192 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
 193 {
 194     picture_t *p_outpic;
 195     filter_sys_t *p_sys = p_filter->p_sys;
 196
 197     if( !p_pic ) return NULL;
 198
 199     p_outpic = filter_NewPicture( p_filter );
 200     if( !p_outpic )
 201     {
 202         picture_Release( p_pic );
 203         return NULL;
 204     }
 205
 206     if( p_sys->p_motion != NULL )
 207     {
 208         int i_angle = motion_get_angle( p_sys->p_motion );
 209         store_trigo( p_sys, i_angle / 20.f );
 210     }
 211
 212     int i_sin, i_cos;
 213     fetch_trigo( p_sys, &i_sin, &i_cos );
 214
 215     for( int i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 216     {
 217         plane_t *p_srcp = &p_pic->p[i_plane];
 218         plane_t *p_dstp = &p_outpic->p[i_plane];
 219
 220         const int i_visible_lines = p_srcp->i_visible_lines;
 221         const int i_visible_pitch = p_srcp->i_visible_pitch;
 222
 223         const int i_aspect = __MAX( 1, ( i_visible_lines * p_pic->p[Y_PLANE].i_visible_pitch ) / ( p_pic->p[Y_PLANE].i_visible_lines * i_visible_pitch ));
 224         /* = 2 for U and V planes in YUV 4:2:2, = 1 otherwise */
 225
 226         const int i_line_center = i_visible_lines>>1;
 227         const int i_col_center  = i_visible_pitch>>1;
 228
 229         const uint8_t black_pixel = ( i_plane == Y_PLANE ) ? 0x00 : 0x80;
 230
 231         const int i_line_next =  i_cos / i_aspect -i_sin*i_visible_pitch;
 232         const int i_col_next  = -i_sin / i_aspect -i_cos*i_visible_pitch;
 233         int i_line_orig0 = ( - i_cos * i_line_center / i_aspect
 234                              - i_sin * i_col_center + (1<<11) );
 235         int i_col_orig0 =    i_sin * i_line_center / i_aspect
 236                            - i_cos * i_col_center + (1<<11);
 237         for( int y = 0; y < i_visible_lines; y++)
 238         {
 239             uint8_t *p_out = &p_dstp->p_pixels[y * p_dstp->i_pitch];
 240
 241             for( int x = 0; x < i_visible_pitch; x++, p_out++ )
 242             {
 243                 const int i_line_orig = (i_line_orig0>>12)*i_aspect + i_line_center;
 244                 const int i_col_orig  = (i_col_orig0>>12)  + i_col_center;
 245                 const uint8_t *p_orig_offset = &p_srcp->p_pixels[i_line_orig * p_srcp->i_pitch + i_col_orig];
 246                 const uint8_t i_line_percent = (i_line_orig0>>4) & 255;
 247                 const uint8_t i_col_percent  = (i_col_orig0 >>4) & 255;
 248
 249                 if(    -1 <= i_line_orig && i_line_orig < i_visible_lines
 250                     && -1 <= i_col_orig  && i_col_orig  < i_visible_pitch )
 251                 {
 252                 #define test 1
 253                 #undef test
 254                 #ifdef test
 255                     if( ( i_col_orig > i_visible_pitch/2 ) )
 256                 #endif
 257                     {
 258                         uint8_t i_curpix = black_pixel;
 259                         uint8_t i_colpix = black_pixel;
 260                         uint8_t i_linpix = black_pixel;
 261                         uint8_t i_nexpix = black_pixel;
 262                         if( ( 0 <= i_line_orig ) && ( 0 <= i_col_orig ) )
 263                             i_curpix = *p_orig_offset;
 264                         p_orig_offset++;
 265
 266                         if(  ( i_col_orig < i_visible_pitch - 1)
 267                              && ( i_line_orig >= 0 ) )
 268                             i_colpix = *p_orig_offset;
 269
 270                         p_orig_offset += p_srcp->i_pitch;
 271                         if( ( i_line_orig < i_visible_lines - 1)
 272                             && ( i_col_orig  < i_visible_pitch - 1) )
 273                             i_nexpix = *p_orig_offset;
 274
 275                         p_orig_offset--;
 276                         if(  ( i_line_orig < i_visible_lines - 1)
 277                              && ( i_col_orig >= 0 ) )
 278                             i_linpix = *p_orig_offset;
 279
 280                         unsigned int temp = 0;
 281                         temp+= i_curpix *
 282                             (256 - i_line_percent) * ( 256 - i_col_percent );
 283                         temp+= i_linpix *
 284                             i_line_percent * (256 - i_col_percent );
 285                         temp+= i_nexpix *
 286                             ( i_col_percent) * ( i_line_percent);
 287                         temp+= i_colpix *
 288                             i_col_percent * (256 - i_line_percent );
 289                         *p_out = temp >> 16;
 290                     }
 291                 #ifdef test
 292                     else if (i_col_orig == i_visible_pitch/2 )
 293                     {   *p_out = black_pixel;
 294                     }
 295                     else
 296                         *p_out = *p_orig_offset;
 297                 #endif
 298                 #undef test
 299                 }
 300                 else
 301                 {
 302                     *p_out = black_pixel;
 303                 }
 304
 305                 i_line_orig0 += i_sin;
 306                 i_col_orig0 += i_cos;
 307             }
 308
 309             i_line_orig0 += i_line_next;
 310             i_col_orig0 += i_col_next;
 311         }
 312     }
 313
 314     return CopyInfoAndRelease( p_outpic, p_pic );
 315 }
 316
 317 /*****************************************************************************
 318  *
 319  *****************************************************************************/
 320 static picture_t *FilterPacked( filter_t *p_filter, picture_t *p_pic )
 321 {
 322     picture_t *p_outpic;
 323     filter_sys_t *p_sys = p_filter->p_sys;
 324
 325     if( !p_pic ) return NULL;
 326
 327     int i_u_offset, i_v_offset, i_y_offset;
 328
 329     if( GetPackedYuvOffsets( p_pic->format.i_chroma, &i_y_offset,
 330                              &i_u_offset, &i_v_offset ) != VLC_SUCCESS )
 331     {
 332         msg_Warn( p_filter, "Unsupported input chroma (%4.4s)",
 333                   (char*)&(p_pic->format.i_chroma) );
 334         picture_Release( p_pic );
 335         return NULL;
 336     }
 337
 338     p_outpic = filter_NewPicture( p_filter );
 339     if( !p_outpic )
 340     {
 341         picture_Release( p_pic );
 342         return NULL;
 343     }
 344
 345     const int i_visible_pitch = p_pic->p->i_visible_pitch>>1; /* In fact it's i_visible_pixels */
 346     const int i_visible_lines = p_pic->p->i_visible_lines;
 347
 348     const uint8_t *p_in   = p_pic->p->p_pixels+i_y_offset;
 349     const uint8_t *p_in_u = p_pic->p->p_pixels+i_u_offset;
 350     const uint8_t *p_in_v = p_pic->p->p_pixels+i_v_offset;
 351     const int i_in_pitch  = p_pic->p->i_pitch;
 352
 353     uint8_t *p_out   = p_outpic->p->p_pixels+i_y_offset;
 354     uint8_t *p_out_u = p_outpic->p->p_pixels+i_u_offset;
 355     uint8_t *p_out_v = p_outpic->p->p_pixels+i_v_offset;
 356     const int i_out_pitch = p_outpic->p->i_pitch;
 357
 358     const int i_line_center = i_visible_lines>>1;
 359     const int i_col_center  = i_visible_pitch>>1;
 360
 361     if( p_sys->p_motion != NULL )
 362     {
 363         int i_angle = motion_get_angle( p_sys->p_motion );
 364         store_trigo( p_sys, i_angle / 20.f );
 365     }
 366
 367     int i_sin, i_cos;
 368     fetch_trigo( p_sys, &i_sin, &i_cos );
 369
 370     int i_col, i_line;
 371     for( i_line = 0; i_line < i_visible_lines; i_line++ )
 372     {
 373         for( i_col = 0; i_col < i_visible_pitch; i_col++ )
 374         {
 375             int i_line_orig;
 376             int i_col_orig;
 377             /* Handle "1st Y", U and V */
 378             i_line_orig = i_line_center +
 379                 ( ( i_sin * ( i_col - i_col_center )
 380                   + i_cos * ( i_line - i_line_center ) )>>12 );
 381             i_col_orig = i_col_center +
 382                 ( ( i_cos * ( i_col - i_col_center )
 383                   - i_sin * ( i_line - i_line_center ) )>>12 );
 384             if( 0 <= i_col_orig && i_col_orig < i_visible_pitch
 385              && 0 <= i_line_orig && i_line_orig < i_visible_lines )
 386             {
 387                 p_out[i_line*i_out_pitch+2*i_col] = p_in[i_line_orig*i_in_pitch+2*i_col_orig];
 388                 i_col_orig /= 2;
 389                 p_out_u[i_line*i_out_pitch+2*i_col] = p_in_u[i_line_orig*i_in_pitch+4*i_col_orig];
 390                 p_out_v[i_line*i_out_pitch+2*i_col] = p_in_v[i_line_orig*i_in_pitch+4*i_col_orig];
 391             }
 392             else
 393             {
 394                 p_out[i_line*i_out_pitch+2*i_col] = 0x00;
 395                 p_out_u[i_line*i_out_pitch+2*i_col] = 0x80;
 396                 p_out_v[i_line*i_out_pitch+2*i_col] = 0x80;
 397             }
 398
 399             /* Handle "2nd Y" */
 400             i_col++;
 401             if( i_col >= i_visible_pitch )
 402                 break;
 403
 404             i_line_orig = i_line_center +
 405                 ( ( i_sin * ( i_col - i_col_center )
 406                   + i_cos * ( i_line - i_line_center ) )>>12 );
 407             i_col_orig = i_col_center +
 408                 ( ( i_cos * ( i_col - i_col_center )
 409                   - i_sin * ( i_line - i_line_center ) )>>12 );
 410             if( 0 <= i_col_orig && i_col_orig < i_visible_pitch
 411              && 0 <= i_line_orig && i_line_orig < i_visible_lines )
 412             {
 413                 p_out[i_line*i_out_pitch+2*i_col] = p_in[i_line_orig*i_in_pitch+2*i_col_orig];
 414             }
 415             else
 416             {
 417                 p_out[i_line*i_out_pitch+2*i_col] = 0x00;
 418             }
 419         }
 420     }
 421
 422     return CopyInfoAndRelease( p_outpic, p_pic );
 423 }
 424
 425 /*****************************************************************************
 426  * Angle modification callback.
 427  *****************************************************************************/
 428 static int RotateCallback( vlc_object_t *p_this, char const *psz_var,
 429                            vlc_value_t oldval, vlc_value_t newval, void *data )
 430 {
 431     filter_sys_t *p_sys = data;
 432
 433     store_trigo( p_sys, newval.f_float );
 434     (void) p_this; (void) psz_var; (void) oldval;
 435     return VLC_SUCCESS;
 436 }