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

   1 /*****************************************************************************
   2  * transform.c : transform image module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000-2006 the VideoLAN team
   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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, 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 const char *type_list[] = { "90", "180", "270", "hflip", "vflip" };
  61 static const 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 #define CFG_PREFIX "transform-"
  66
  67 vlc_module_begin();
  68     set_description( _("Video transformation filter") );
  69     set_shortname( _("Transformation"));
  70     set_capability( "video filter", 0 );
  71     set_category( CAT_VIDEO );
  72     set_subcategory( SUBCAT_VIDEO_VFILTER );
  73
  74     add_string( CFG_PREFIX "type", "90", NULL,
  75                           TYPE_TEXT, TYPE_LONGTEXT, VLC_FALSE);
  76         change_string_list( type_list, type_list_text, 0);
  77
  78     add_shortcut( "transform" );
  79     set_callbacks( Create, Destroy );
  80 vlc_module_end();
  81
  82 static const char *ppsz_filter_options[] = {
  83     "type", NULL
  84 };
  85
  86 /*****************************************************************************
  87  * vout_sys_t: Transform video output method descriptor
  88  *****************************************************************************
  89  * This structure is part of the video output thread descriptor.
  90  * It describes the Transform specific properties of an output thread.
  91  *****************************************************************************/
  92 struct vout_sys_t
  93 {
  94     int i_mode;
  95     vlc_bool_t b_rotation;
  96     vout_thread_t *p_vout;
  97 };
  98
  99 /*****************************************************************************
 100  * Control: control facility for the vout (forwards to child vout)
 101  *****************************************************************************/
 102 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 103 {
 104     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
 105 }
 106
 107 /*****************************************************************************
 108  * Create: allocates Transform video thread output method
 109  *****************************************************************************
 110  * This function allocates and initializes a Transform vout method.
 111  *****************************************************************************/
 112 static int Create( vlc_object_t *p_this )
 113 {
 114     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 115     char *psz_method;
 116
 117     /* Allocate structure */
 118     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 119     if( p_vout->p_sys == NULL )
 120     {
 121         msg_Err( p_vout, "out of memory" );
 122         return VLC_ENOMEM;
 123     }
 124
 125     p_vout->pf_init = Init;
 126     p_vout->pf_end = End;
 127     p_vout->pf_manage = NULL;
 128     p_vout->pf_render = Render;
 129     p_vout->pf_display = NULL;
 130     p_vout->pf_control = Control;
 131
 132     config_ChainParse( p_vout, CFG_PREFIX, ppsz_filter_options,
 133                            p_vout->p_cfg );
 134
 135     /* Look what method was requested */
 136     psz_method = var_CreateGetNonEmptyString( p_vout, "transform-type" );
 137
 138     if( psz_method == NULL )
 139     {
 140         msg_Err( p_vout, "configuration variable %s empty", "transform-type" );
 141         msg_Err( p_vout, "no valid transform mode provided, using '90'" );
 142         p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
 143         p_vout->p_sys->b_rotation = 1;
 144     }
 145     else
 146     {
 147         if( !strcmp( psz_method, "hflip" ) )
 148         {
 149             p_vout->p_sys->i_mode = TRANSFORM_MODE_HFLIP;
 150             p_vout->p_sys->b_rotation = 0;
 151         }
 152         else if( !strcmp( psz_method, "vflip" ) )
 153         {
 154             p_vout->p_sys->i_mode = TRANSFORM_MODE_VFLIP;
 155             p_vout->p_sys->b_rotation = 0;
 156         }
 157         else if( !strcmp( psz_method, "90" ) )
 158         {
 159             p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
 160             p_vout->p_sys->b_rotation = 1;
 161         }
 162         else if( !strcmp( psz_method, "180" ) )
 163         {
 164             p_vout->p_sys->i_mode = TRANSFORM_MODE_180;
 165             p_vout->p_sys->b_rotation = 0;
 166         }
 167         else if( !strcmp( psz_method, "270" ) )
 168         {
 169             p_vout->p_sys->i_mode = TRANSFORM_MODE_270;
 170             p_vout->p_sys->b_rotation = 1;
 171         }
 172         else
 173         {
 174             msg_Err( p_vout, "no valid transform mode provided, using '90'" );
 175             p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
 176             p_vout->p_sys->b_rotation = 1;
 177         }
 178
 179         free( psz_method );
 180     }
 181
 182     return VLC_SUCCESS;
 183 }
 184
 185 /*****************************************************************************
 186  * Init: initialize Transform video thread output method
 187  *****************************************************************************/
 188 static int Init( vout_thread_t *p_vout )
 189 {
 190     int i_index;
 191     picture_t *p_pic;
 192     video_format_t fmt = {0};
 193
 194     I_OUTPUTPICTURES = 0;
 195
 196     /* Initialize the output structure */
 197     p_vout->output.i_chroma = p_vout->render.i_chroma;
 198     p_vout->output.i_width  = p_vout->render.i_width;
 199     p_vout->output.i_height = p_vout->render.i_height;
 200     p_vout->output.i_aspect = p_vout->render.i_aspect;
 201     p_vout->fmt_out = p_vout->fmt_in;
 202     fmt = p_vout->fmt_out;
 203
 204     /* Try to open the real video output */
 205     msg_Dbg( p_vout, "spawning the real video output" );
 206
 207     if( p_vout->p_sys->b_rotation )
 208     {
 209         fmt.i_width = p_vout->fmt_out.i_height;
 210         fmt.i_visible_width = p_vout->fmt_out.i_visible_height;
 211         fmt.i_x_offset = p_vout->fmt_out.i_y_offset;
 212
 213         fmt.i_height = p_vout->fmt_out.i_width;
 214         fmt.i_visible_height = p_vout->fmt_out.i_visible_width;
 215         fmt.i_y_offset = p_vout->fmt_out.i_x_offset;
 216
 217         fmt.i_aspect = VOUT_ASPECT_FACTOR *
 218             (uint64_t)VOUT_ASPECT_FACTOR / fmt.i_aspect;
 219
 220         fmt.i_sar_num = p_vout->fmt_out.i_sar_den;
 221         fmt.i_sar_den = p_vout->fmt_out.i_sar_num;
 222     }
 223
 224     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 225
 226     /* Everything failed */
 227     if( p_vout->p_sys->p_vout == NULL )
 228     {
 229         msg_Err( p_vout, "cannot open vout, aborting" );
 230         return VLC_EGENERIC;
 231     }
 232
 233     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 234
 235     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 236
 237     ADD_PARENT_CALLBACKS( SendEventsToChild );
 238
 239     return VLC_SUCCESS;
 240 }
 241
 242 /*****************************************************************************
 243  * End: terminate Transform video thread output method
 244  *****************************************************************************/
 245 static void End( vout_thread_t *p_vout )
 246 {
 247     int i_index;
 248
 249     /* Free the fake output buffers we allocated */
 250     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 251     {
 252         i_index--;
 253         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 254     }
 255 }
 256
 257 /*****************************************************************************
 258  * Destroy: destroy Transform video thread output method
 259  *****************************************************************************
 260  * Terminate an output method created by TransformCreateOutputMethod
 261  *****************************************************************************/
 262 static void Destroy( vlc_object_t *p_this )
 263 {
 264     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 265
 266     if( p_vout->p_sys->p_vout )
 267     {
 268         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 269         vlc_object_detach( p_vout->p_sys->p_vout );
 270         vout_Destroy( p_vout->p_sys->p_vout );
 271     }
 272
 273     DEL_PARENT_CALLBACKS( SendEventsToChild );
 274
 275     free( p_vout->p_sys );
 276 }
 277
 278 /*****************************************************************************
 279  * Render: displays previously rendered output
 280  *****************************************************************************
 281  * This function send the currently rendered image to Transform image, waits
 282  * until it is displayed and switch the two rendering buffers, preparing next
 283  * frame.
 284  *****************************************************************************/
 285 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 286 {
 287     picture_t *p_outpic;
 288     int i_index;
 289
 290     /* This is a new frame. Get a structure from the video_output. */
 291     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 292               == NULL )
 293     {
 294         if( p_vout->b_die || p_vout->b_error )
 295         {
 296             return;
 297         }
 298         msleep( VOUT_OUTMEM_SLEEP );
 299     }
 300
 301     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 302     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 303
 304     switch( p_vout->p_sys->i_mode )
 305     {
 306         case TRANSFORM_MODE_90:
 307             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 308             {
 309                 int i_pitch = p_pic->p[i_index].i_pitch;
 310
 311                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 312
 313                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 314                 uint8_t *p_out_end = p_out +
 315                     p_outpic->p[i_index].i_visible_lines *
 316                     p_outpic->p[i_index].i_pitch;
 317
 318                 for( ; p_out < p_out_end ; )
 319                 {
 320                     uint8_t *p_line_end;
 321
 322                     p_out_end -= p_outpic->p[i_index].i_pitch
 323                                   - p_outpic->p[i_index].i_visible_pitch;
 324                     p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
 325                         i_pitch;
 326
 327                     for( ; p_in < p_line_end ; )
 328                     {
 329                         p_line_end -= i_pitch;
 330                         *(--p_out_end) = *p_line_end;
 331                     }
 332
 333                     p_in++;
 334                 }
 335             }
 336             break;
 337
 338         case TRANSFORM_MODE_180:
 339             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 340             {
 341                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 342                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 343                                             * p_pic->p[i_index].i_pitch;
 344
 345                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 346
 347                 for( ; p_in < p_in_end ; )
 348                 {
 349                     uint8_t *p_line_start = p_in_end
 350                                              - p_pic->p[i_index].i_pitch;
 351                     p_in_end -= p_pic->p[i_index].i_pitch
 352                                  - p_pic->p[i_index].i_visible_pitch;
 353
 354                     for( ; p_line_start < p_in_end ; )
 355                     {
 356                         *p_out++ = *(--p_in_end);
 357                     }
 358
 359                     p_out += p_outpic->p[i_index].i_pitch
 360                               - p_outpic->p[i_index].i_visible_pitch;
 361                 }
 362             }
 363             break;
 364
 365         case TRANSFORM_MODE_270:
 366             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 367             {
 368                 int i_pitch = p_pic->p[i_index].i_pitch;
 369
 370                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 371
 372                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 373                 uint8_t *p_out_end = p_out +
 374                     p_outpic->p[i_index].i_visible_lines *
 375                     p_outpic->p[i_index].i_pitch;
 376
 377                 for( ; p_out < p_out_end ; )
 378                 {
 379                     uint8_t *p_in_end;
 380
 381                     p_in_end = p_in + p_pic->p[i_index].i_visible_lines *
 382                         i_pitch;
 383
 384                     for( ; p_in < p_in_end ; )
 385                     {
 386                         p_in_end -= i_pitch;
 387                         *p_out++ = *p_in_end;
 388                     }
 389
 390                     p_out += p_outpic->p[i_index].i_pitch
 391                               - p_outpic->p[i_index].i_visible_pitch;
 392                     p_in++;
 393                 }
 394             }
 395             break;
 396
 397         case TRANSFORM_MODE_HFLIP:
 398             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 399             {
 400                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 401                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 402                                             * p_pic->p[i_index].i_pitch;
 403
 404                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 405
 406                 for( ; p_in < p_in_end ; )
 407                 {
 408                     p_in_end -= p_pic->p[i_index].i_pitch;
 409                     p_vout->p_libvlc->pf_memcpy( p_out, p_in_end,
 410                                            p_pic->p[i_index].i_visible_pitch );
 411                     p_out += p_pic->p[i_index].i_pitch;
 412                 }
 413             }
 414             break;
 415
 416         case TRANSFORM_MODE_VFLIP:
 417             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 418             {
 419                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 420                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 421                                             * p_pic->p[i_index].i_pitch;
 422
 423                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 424
 425                 for( ; p_in < p_in_end ; )
 426                 {
 427                     uint8_t *p_line_end = p_in
 428                                            + p_pic->p[i_index].i_visible_pitch;
 429
 430                     for( ; p_in < p_line_end ; )
 431                     {
 432                         *p_out++ = *(--p_line_end);
 433                     }
 434
 435                     p_in += p_pic->p[i_index].i_pitch;
 436                 }
 437             }
 438             break;
 439
 440         default:
 441             break;
 442     }
 443
 444     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 445
 446     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 447 }
 448
 449 /*****************************************************************************
 450  * SendEvents: forward mouse and keyboard events to the parent p_vout
 451  *****************************************************************************/
 452 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 453                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 454 {
 455     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 456     vlc_value_t sentval = newval;
 457
 458     /* Translate the mouse coordinates */
 459     if( !strcmp( psz_var, "mouse-x" ) )
 460     {
 461         switch( p_vout->p_sys->i_mode )
 462         {
 463         case TRANSFORM_MODE_270:
 464             sentval.i_int = p_vout->p_sys->p_vout->output.i_width
 465                              - sentval.i_int;
 466         case TRANSFORM_MODE_90:
 467             var_Set( p_vout, "mouse-y", sentval );
 468             return VLC_SUCCESS;
 469
 470         case TRANSFORM_MODE_180:
 471         case TRANSFORM_MODE_HFLIP:
 472             sentval.i_int = p_vout->p_sys->p_vout->output.i_width
 473                              - sentval.i_int;
 474             break;
 475
 476         case TRANSFORM_MODE_VFLIP:
 477         default:
 478             break;
 479         }
 480     }
 481     else if( !strcmp( psz_var, "mouse-y" ) )
 482     {
 483         switch( p_vout->p_sys->i_mode )
 484         {
 485         case TRANSFORM_MODE_90:
 486             sentval.i_int = p_vout->p_sys->p_vout->output.i_height
 487                              - sentval.i_int;
 488         case TRANSFORM_MODE_270:
 489             var_Set( p_vout, "mouse-x", sentval );
 490             return VLC_SUCCESS;
 491
 492         case TRANSFORM_MODE_180:
 493         case TRANSFORM_MODE_VFLIP:
 494             sentval.i_int = p_vout->p_sys->p_vout->output.i_height
 495                              - sentval.i_int;
 496             break;
 497
 498         case TRANSFORM_MODE_HFLIP:
 499         default:
 500             break;
 501         }
 502     }
 503
 504     var_Set( p_vout, psz_var, sentval );
 505
 506     return VLC_SUCCESS;
 507 }
 508
 509 /*****************************************************************************
 510  * SendEventsToChild: forward events to the child/children vout
 511  *****************************************************************************/
 512 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 513                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 514 {
 515     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 516     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 517     return VLC_SUCCESS;
 518 }