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