git.sesse.net Git - vlc/blob - modules/video_filter/transform.c

   1 /*****************************************************************************
   2  * transform.c : transform image module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000-2004 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.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., 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 #define TRANSFORM_MODE_HFLIP   1
  36 #define TRANSFORM_MODE_VFLIP   2
  37 #define TRANSFORM_MODE_90      3
  38 #define TRANSFORM_MODE_180     4
  39 #define TRANSFORM_MODE_270     5
  40
  41 /*****************************************************************************
  42  * Local prototypes
  43  *****************************************************************************/
  44 static int  Create    ( vlc_object_t * );
  45 static void Destroy   ( vlc_object_t * );
  46
  47 static int  Init      ( vout_thread_t * );
  48 static void End       ( vout_thread_t * );
  49 static void Render    ( vout_thread_t *, picture_t * );
  50
  51 static int  SendEvents( vlc_object_t *, char const *,
  52                         vlc_value_t, vlc_value_t, void * );
  53
  54 /*****************************************************************************
  55  * Module descriptor
  56  *****************************************************************************/
  57 #define TYPE_TEXT N_("Transform type")
  58 #define TYPE_LONGTEXT N_("One of '90', '180', '270', 'hflip' and 'vflip'")
  59
  60 static char *type_list[] = { "90", "180", "270", "hflip", "vflip" };
  61 static char *type_list_text[] = { N_("Rotate by 90 degrees"),
  62   N_("Rotate by 180 degrees"), N_("Rotate by 270 degrees"),
  63   N_("Flip horizontally"), N_("Flip vertically") };
  64
  65 vlc_module_begin();
  66     set_description( _("Video transformation filter") );
  67     set_shortname( N_("Transformation"));
  68     set_capability( "video filter", 0 );
  69     set_category( CAT_VIDEO );
  70     set_subcategory( SUBCAT_VIDEO_VFILTER );
  71
  72     add_string( "transform-type", "90", NULL,
  73                           TYPE_TEXT, TYPE_LONGTEXT, VLC_FALSE);
  74         change_string_list( type_list, type_list_text, 0);
  75
  76     add_shortcut( "transform" );
  77     set_callbacks( Create, Destroy );
  78 vlc_module_end();
  79
  80 /*****************************************************************************
  81  * vout_sys_t: Transform video output method descriptor
  82  *****************************************************************************
  83  * This structure is part of the video output thread descriptor.
  84  * It describes the Transform specific properties of an output thread.
  85  *****************************************************************************/
  86 struct vout_sys_t
  87 {
  88     int i_mode;
  89     vlc_bool_t b_rotation;
  90     vout_thread_t *p_vout;
  91 };
  92
  93 /*****************************************************************************
  94  * Control: control facility for the vout (forwards to child vout)
  95  *****************************************************************************/
  96 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
  97 {
  98     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
  99 }
 100
 101 /*****************************************************************************
 102  * Create: allocates Transform video thread output method
 103  *****************************************************************************
 104  * This function allocates and initializes a Transform vout method.
 105  *****************************************************************************/
 106 static int Create( vlc_object_t *p_this )
 107 {
 108     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 109     char *psz_method;
 110
 111     /* Allocate structure */
 112     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 113     if( p_vout->p_sys == NULL )
 114     {
 115         msg_Err( p_vout, "out of memory" );
 116         return VLC_ENOMEM;
 117     }
 118
 119     p_vout->pf_init = Init;
 120     p_vout->pf_end = End;
 121     p_vout->pf_manage = NULL;
 122     p_vout->pf_render = Render;
 123     p_vout->pf_display = NULL;
 124     p_vout->pf_control = Control;
 125
 126     /* Look what method was requested */
 127     psz_method = config_GetPsz( p_vout, "transform-type" );
 128
 129     if( psz_method == NULL )
 130     {
 131         msg_Err( p_vout, "configuration variable %s empty", "transform-type" );
 132         msg_Err( p_vout, "no valid transform mode provided, using '90'" );
 133         p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
 134         p_vout->p_sys->b_rotation = 1;
 135     }
 136     else
 137     {
 138         if( !strcmp( psz_method, "hflip" ) )
 139         {
 140             p_vout->p_sys->i_mode = TRANSFORM_MODE_HFLIP;
 141             p_vout->p_sys->b_rotation = 0;
 142         }
 143         else if( !strcmp( psz_method, "vflip" ) )
 144         {
 145             p_vout->p_sys->i_mode = TRANSFORM_MODE_VFLIP;
 146             p_vout->p_sys->b_rotation = 0;
 147         }
 148         else if( !strcmp( psz_method, "90" ) )
 149         {
 150             p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
 151             p_vout->p_sys->b_rotation = 1;
 152         }
 153         else if( !strcmp( psz_method, "180" ) )
 154         {
 155             p_vout->p_sys->i_mode = TRANSFORM_MODE_180;
 156             p_vout->p_sys->b_rotation = 0;
 157         }
 158         else if( !strcmp( psz_method, "270" ) )
 159         {
 160             p_vout->p_sys->i_mode = TRANSFORM_MODE_270;
 161             p_vout->p_sys->b_rotation = 1;
 162         }
 163         else
 164         {
 165             msg_Err( p_vout, "no valid transform mode provided, using '90'" );
 166             p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
 167             p_vout->p_sys->b_rotation = 1;
 168         }
 169
 170         free( psz_method );
 171     }
 172
 173     return VLC_SUCCESS;
 174 }
 175
 176 /*****************************************************************************
 177  * Init: initialize Transform video thread output method
 178  *****************************************************************************/
 179 static int Init( vout_thread_t *p_vout )
 180 {
 181     int i_index;
 182     picture_t *p_pic;
 183
 184     I_OUTPUTPICTURES = 0;
 185
 186     /* Initialize the output structure */
 187     p_vout->output.i_chroma = p_vout->render.i_chroma;
 188     p_vout->output.i_width  = p_vout->render.i_width;
 189     p_vout->output.i_height = p_vout->render.i_height;
 190     p_vout->output.i_aspect = p_vout->render.i_aspect;
 191
 192     /* Try to open the real video output */
 193     msg_Dbg( p_vout, "spawning the real video output" );
 194
 195     if( p_vout->p_sys->b_rotation )
 196     {
 197         p_vout->p_sys->p_vout = vout_Create( p_vout,
 198                            p_vout->render.i_height, p_vout->render.i_width,
 199                            p_vout->render.i_chroma,
 200                            (uint64_t)VOUT_ASPECT_FACTOR
 201                             * (uint64_t)VOUT_ASPECT_FACTOR
 202                             / (uint64_t)p_vout->render.i_aspect );
 203     }
 204     else
 205     {
 206         p_vout->p_sys->p_vout = vout_Create( p_vout,
 207                            p_vout->render.i_width, p_vout->render.i_height,
 208                            p_vout->render.i_chroma, p_vout->render.i_aspect );
 209     }
 210
 211     /* Everything failed */
 212     if( p_vout->p_sys->p_vout == NULL )
 213     {
 214         msg_Err( p_vout, "cannot open vout, aborting" );
 215         return VLC_EGENERIC;
 216     }
 217
 218     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 219
 220     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 221
 222     ADD_PARENT_CALLBACKS( SendEventsToChild );
 223
 224     return VLC_SUCCESS;
 225 }
 226
 227 /*****************************************************************************
 228  * End: terminate Transform video thread output method
 229  *****************************************************************************/
 230 static void End( vout_thread_t *p_vout )
 231 {
 232     int i_index;
 233
 234     /* Free the fake output buffers we allocated */
 235     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 236     {
 237         i_index--;
 238         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 239     }
 240 }
 241
 242 /*****************************************************************************
 243  * Destroy: destroy Transform video thread output method
 244  *****************************************************************************
 245  * Terminate an output method created by TransformCreateOutputMethod
 246  *****************************************************************************/
 247 static void Destroy( vlc_object_t *p_this )
 248 {
 249     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 250
 251     if( p_vout->p_sys->p_vout )
 252     {
 253         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 254         vlc_object_detach( p_vout->p_sys->p_vout );
 255         vout_Destroy( p_vout->p_sys->p_vout );
 256     }
 257
 258     DEL_PARENT_CALLBACKS( SendEventsToChild );
 259
 260     free( p_vout->p_sys );
 261 }
 262
 263 /*****************************************************************************
 264  * Render: displays previously rendered output
 265  *****************************************************************************
 266  * This function send the currently rendered image to Transform image, waits
 267  * until it is displayed and switch the two rendering buffers, preparing next
 268  * frame.
 269  *****************************************************************************/
 270 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 271 {
 272     picture_t *p_outpic;
 273     int i_index;
 274
 275     /* This is a new frame. Get a structure from the video_output. */
 276     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 277               == NULL )
 278     {
 279         if( p_vout->b_die || p_vout->b_error )
 280         {
 281             return;
 282         }
 283         msleep( VOUT_OUTMEM_SLEEP );
 284     }
 285
 286     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 287     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 288
 289     switch( p_vout->p_sys->i_mode )
 290     {
 291         case TRANSFORM_MODE_90:
 292             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 293             {
 294                 int i_pitch = p_pic->p[i_index].i_pitch;
 295
 296                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 297
 298                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 299                 uint8_t *p_out_end = p_out +
 300                     p_outpic->p[i_index].i_visible_lines *
 301                     p_outpic->p[i_index].i_pitch;
 302
 303                 for( ; p_out < p_out_end ; )
 304                 {
 305                     uint8_t *p_line_end;
 306
 307                     p_out_end -= p_outpic->p[i_index].i_pitch
 308                                   - p_outpic->p[i_index].i_visible_pitch;
 309                     p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
 310                         i_pitch;
 311
 312                     for( ; p_in < p_line_end ; )
 313                     {
 314                         p_line_end -= i_pitch;
 315                         *(--p_out_end) = *p_line_end;
 316                     }
 317
 318                     p_in++;
 319                 }
 320             }
 321             break;
 322
 323         case TRANSFORM_MODE_180:
 324             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 325             {
 326                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 327                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 328                                             * p_pic->p[i_index].i_pitch;
 329
 330                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 331
 332                 for( ; p_in < p_in_end ; )
 333                 {
 334                     uint8_t *p_line_start = p_in_end
 335                                              - p_pic->p[i_index].i_pitch;
 336                     p_in_end -= p_pic->p[i_index].i_pitch
 337                                  - p_pic->p[i_index].i_visible_pitch;
 338
 339                     for( ; p_line_start < p_in_end ; )
 340                     {
 341                         *p_out++ = *(--p_in_end);
 342                     }
 343
 344                     p_out += p_outpic->p[i_index].i_pitch
 345                               - p_outpic->p[i_index].i_visible_pitch;
 346                 }
 347             }
 348             break;
 349
 350         case TRANSFORM_MODE_270:
 351             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 352             {
 353                 int i_pitch = p_pic->p[i_index].i_pitch;
 354
 355                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 356
 357                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 358                 uint8_t *p_out_end = p_out +
 359                     p_outpic->p[i_index].i_visible_lines *
 360                     p_outpic->p[i_index].i_pitch;
 361
 362                 for( ; p_out < p_out_end ; )
 363                 {
 364                     uint8_t *p_in_end;
 365
 366                     p_in_end = p_in + p_pic->p[i_index].i_visible_lines *
 367                         i_pitch;
 368
 369                     for( ; p_in < p_in_end ; )
 370                     {
 371                         p_in_end -= i_pitch;
 372                         *p_out++ = *p_in_end;
 373                     }
 374
 375                     p_out += p_outpic->p[i_index].i_pitch
 376                               - p_outpic->p[i_index].i_visible_pitch;
 377                     p_in++;
 378                 }
 379             }
 380             break;
 381
 382         case TRANSFORM_MODE_HFLIP:
 383             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 384             {
 385                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 386                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 387                                             * p_pic->p[i_index].i_pitch;
 388
 389                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 390
 391                 for( ; p_in < p_in_end ; )
 392                 {
 393                     p_in_end -= p_pic->p[i_index].i_pitch;
 394                     p_vout->p_vlc->pf_memcpy( p_out, p_in_end,
 395                                            p_pic->p[i_index].i_visible_pitch );
 396                     p_out += p_pic->p[i_index].i_pitch;
 397                 }
 398             }
 399             break;
 400
 401         case TRANSFORM_MODE_VFLIP:
 402             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 403             {
 404                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 405                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 406                                             * p_pic->p[i_index].i_pitch;
 407
 408                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 409
 410                 for( ; p_in < p_in_end ; )
 411                 {
 412                     uint8_t *p_line_end = p_in
 413                                            + p_pic->p[i_index].i_visible_pitch;
 414
 415                     for( ; p_in < p_line_end ; )
 416                     {
 417                         *p_out++ = *(--p_line_end);
 418                     }
 419
 420                     p_in += p_pic->p[i_index].i_pitch;
 421                 }
 422             }
 423             break;
 424
 425         default:
 426             break;
 427     }
 428
 429     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 430
 431     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 432 }
 433
 434 /*****************************************************************************
 435  * SendEvents: forward mouse and keyboard events to the parent p_vout
 436  *****************************************************************************/
 437 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 438                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 439 {
 440     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 441     vlc_value_t sentval = newval;
 442
 443     /* Translate the mouse coordinates */
 444     if( !strcmp( psz_var, "mouse-x" ) )
 445     {
 446         switch( p_vout->p_sys->i_mode )
 447         {
 448         case TRANSFORM_MODE_270:
 449             sentval.i_int = p_vout->p_sys->p_vout->output.i_width
 450                              - sentval.i_int;
 451         case TRANSFORM_MODE_90:
 452             var_Set( p_vout, "mouse-y", sentval );
 453             return VLC_SUCCESS;
 454
 455         case TRANSFORM_MODE_180:
 456         case TRANSFORM_MODE_HFLIP:
 457             sentval.i_int = p_vout->p_sys->p_vout->output.i_width
 458                              - sentval.i_int;
 459             break;
 460
 461         case TRANSFORM_MODE_VFLIP:
 462         default:
 463             break;
 464         }
 465     }
 466     else if( !strcmp( psz_var, "mouse-y" ) )
 467     {
 468         switch( p_vout->p_sys->i_mode )
 469         {
 470         case TRANSFORM_MODE_90:
 471             sentval.i_int = p_vout->p_sys->p_vout->output.i_height
 472                              - sentval.i_int;
 473         case TRANSFORM_MODE_270:
 474             var_Set( p_vout, "mouse-x", sentval );
 475             return VLC_SUCCESS;
 476
 477         case TRANSFORM_MODE_180:
 478         case TRANSFORM_MODE_VFLIP:
 479             sentval.i_int = p_vout->p_sys->p_vout->output.i_height
 480                              - sentval.i_int;
 481             break;
 482
 483         case TRANSFORM_MODE_HFLIP:
 484         default:
 485             break;
 486         }
 487     }
 488
 489     var_Set( p_vout, psz_var, sentval );
 490
 491     return VLC_SUCCESS;
 492 }
 493
 494 /*****************************************************************************
 495  * SendEventsToChild: forward events to the child/children vout
 496  *****************************************************************************/
 497 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 498                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 499 {
 500     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 501     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 502     return VLC_SUCCESS;
 503 }