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;
 193
 194     I_OUTPUTPICTURES = 0;
 195     memset( &fmt, 0, sizeof(video_format_t) );
 196
 197     /* Initialize the output structure */
 198     p_vout->output.i_chroma = p_vout->render.i_chroma;
 199     p_vout->output.i_width  = p_vout->render.i_width;
 200     p_vout->output.i_height = p_vout->render.i_height;
 201     p_vout->output.i_aspect = p_vout->render.i_aspect;
 202     p_vout->fmt_out = p_vout->fmt_in;
 203     fmt = p_vout->fmt_out;
 204
 205     /* Try to open the real video output */
 206     msg_Dbg( p_vout, "spawning the real video output" );
 207
 208     if( p_vout->p_sys->b_rotation )
 209     {
 210         fmt.i_width = p_vout->fmt_out.i_height;
 211         fmt.i_visible_width = p_vout->fmt_out.i_visible_height;
 212         fmt.i_x_offset = p_vout->fmt_out.i_y_offset;
 213
 214         fmt.i_height = p_vout->fmt_out.i_width;
 215         fmt.i_visible_height = p_vout->fmt_out.i_visible_width;
 216         fmt.i_y_offset = p_vout->fmt_out.i_x_offset;
 217
 218         fmt.i_aspect = VOUT_ASPECT_FACTOR *
 219             (uint64_t)VOUT_ASPECT_FACTOR / fmt.i_aspect;
 220
 221         fmt.i_sar_num = p_vout->fmt_out.i_sar_den;
 222         fmt.i_sar_den = p_vout->fmt_out.i_sar_num;
 223     }
 224
 225     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 226
 227     /* Everything failed */
 228     if( p_vout->p_sys->p_vout == NULL )
 229     {
 230         msg_Err( p_vout, "cannot open vout, aborting" );
 231         return VLC_EGENERIC;
 232     }
 233
 234     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 235
 236     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 237
 238     ADD_PARENT_CALLBACKS( SendEventsToChild );
 239
 240     return VLC_SUCCESS;
 241 }
 242
 243 /*****************************************************************************
 244  * End: terminate Transform video thread output method
 245  *****************************************************************************/
 246 static void End( vout_thread_t *p_vout )
 247 {
 248     int i_index;
 249
 250     /* Free the fake output buffers we allocated */
 251     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 252     {
 253         i_index--;
 254         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 255     }
 256 }
 257
 258 /*****************************************************************************
 259  * Destroy: destroy Transform video thread output method
 260  *****************************************************************************
 261  * Terminate an output method created by TransformCreateOutputMethod
 262  *****************************************************************************/
 263 static void Destroy( vlc_object_t *p_this )
 264 {
 265     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 266
 267     if( p_vout->p_sys->p_vout )
 268     {
 269         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 270         vlc_object_detach( p_vout->p_sys->p_vout );
 271         vout_Destroy( p_vout->p_sys->p_vout );
 272     }
 273
 274     DEL_PARENT_CALLBACKS( SendEventsToChild );
 275
 276     free( p_vout->p_sys );
 277 }
 278
 279 /*****************************************************************************
 280  * Render: displays previously rendered output
 281  *****************************************************************************
 282  * This function send the currently rendered image to Transform image, waits
 283  * until it is displayed and switch the two rendering buffers, preparing next
 284  * frame.
 285  *****************************************************************************/
 286 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 287 {
 288     picture_t *p_outpic;
 289     int i_index;
 290
 291     /* This is a new frame. Get a structure from the video_output. */
 292     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 293               == NULL )
 294     {
 295         if( p_vout->b_die || p_vout->b_error )
 296         {
 297             return;
 298         }
 299         msleep( VOUT_OUTMEM_SLEEP );
 300     }
 301
 302     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 303     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 304
 305     switch( p_vout->p_sys->i_mode )
 306     {
 307         case TRANSFORM_MODE_90:
 308             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 309             {
 310                 int i_pitch = p_pic->p[i_index].i_pitch;
 311
 312                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 313
 314                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 315                 uint8_t *p_out_end = p_out +
 316                     p_outpic->p[i_index].i_visible_lines *
 317                     p_outpic->p[i_index].i_pitch;
 318
 319                 for( ; p_out < p_out_end ; )
 320                 {
 321                     uint8_t *p_line_end;
 322
 323                     p_out_end -= p_outpic->p[i_index].i_pitch
 324                                   - p_outpic->p[i_index].i_visible_pitch;
 325                     p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
 326                         i_pitch;
 327
 328                     for( ; p_in < p_line_end ; )
 329                     {
 330                         p_line_end -= i_pitch;
 331                         *(--p_out_end) = *p_line_end;
 332                     }
 333
 334                     p_in++;
 335                 }
 336             }
 337             break;
 338
 339         case TRANSFORM_MODE_180:
 340             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 341             {
 342                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 343                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 344                                             * p_pic->p[i_index].i_pitch;
 345
 346                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 347
 348                 for( ; p_in < p_in_end ; )
 349                 {
 350                     uint8_t *p_line_start = p_in_end
 351                                              - p_pic->p[i_index].i_pitch;
 352                     p_in_end -= p_pic->p[i_index].i_pitch
 353                                  - p_pic->p[i_index].i_visible_pitch;
 354
 355                     for( ; p_line_start < p_in_end ; )
 356                     {
 357                         *p_out++ = *(--p_in_end);
 358                     }
 359
 360                     p_out += p_outpic->p[i_index].i_pitch
 361                               - p_outpic->p[i_index].i_visible_pitch;
 362                 }
 363             }
 364             break;
 365
 366         case TRANSFORM_MODE_270:
 367             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 368             {
 369                 int i_pitch = p_pic->p[i_index].i_pitch;
 370
 371                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 372
 373                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 374                 uint8_t *p_out_end = p_out +
 375                     p_outpic->p[i_index].i_visible_lines *
 376                     p_outpic->p[i_index].i_pitch;
 377
 378                 for( ; p_out < p_out_end ; )
 379                 {
 380                     uint8_t *p_in_end;
 381
 382                     p_in_end = p_in + p_pic->p[i_index].i_visible_lines *
 383                         i_pitch;
 384
 385                     for( ; p_in < p_in_end ; )
 386                     {
 387                         p_in_end -= i_pitch;
 388                         *p_out++ = *p_in_end;
 389                     }
 390
 391                     p_out += p_outpic->p[i_index].i_pitch
 392                               - p_outpic->p[i_index].i_visible_pitch;
 393                     p_in++;
 394                 }
 395             }
 396             break;
 397
 398         case TRANSFORM_MODE_HFLIP:
 399             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 400             {
 401                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 402                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 403                                             * p_pic->p[i_index].i_pitch;
 404
 405                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 406
 407                 for( ; p_in < p_in_end ; )
 408                 {
 409                     p_in_end -= p_pic->p[i_index].i_pitch;
 410                     p_vout->p_libvlc->pf_memcpy( p_out, p_in_end,
 411                                            p_pic->p[i_index].i_visible_pitch );
 412                     p_out += p_pic->p[i_index].i_pitch;
 413                 }
 414             }
 415             break;
 416
 417         case TRANSFORM_MODE_VFLIP:
 418             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 419             {
 420                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 421                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 422                                             * p_pic->p[i_index].i_pitch;
 423
 424                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 425
 426                 for( ; p_in < p_in_end ; )
 427                 {
 428                     uint8_t *p_line_end = p_in
 429                                            + p_pic->p[i_index].i_visible_pitch;
 430
 431                     for( ; p_in < p_line_end ; )
 432                     {
 433                         *p_out++ = *(--p_line_end);
 434                     }
 435
 436                     p_in += p_pic->p[i_index].i_pitch;
 437                 }
 438             }
 439             break;
 440
 441         default:
 442             break;
 443     }
 444
 445     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 446
 447     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 448 }
 449
 450 /*****************************************************************************
 451  * SendEvents: forward mouse and keyboard events to the parent p_vout
 452  *****************************************************************************/
 453 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 454                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 455 {
 456     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 457     vlc_value_t sentval = newval;
 458
 459     /* Translate the mouse coordinates */
 460     if( !strcmp( psz_var, "mouse-x" ) )
 461     {
 462         switch( p_vout->p_sys->i_mode )
 463         {
 464         case TRANSFORM_MODE_270:
 465             sentval.i_int = p_vout->p_sys->p_vout->output.i_width
 466                              - sentval.i_int;
 467         case TRANSFORM_MODE_90:
 468             var_Set( p_vout, "mouse-y", sentval );
 469             return VLC_SUCCESS;
 470
 471         case TRANSFORM_MODE_180:
 472         case TRANSFORM_MODE_HFLIP:
 473             sentval.i_int = p_vout->p_sys->p_vout->output.i_width
 474                              - sentval.i_int;
 475             break;
 476
 477         case TRANSFORM_MODE_VFLIP:
 478         default:
 479             break;
 480         }
 481     }
 482     else if( !strcmp( psz_var, "mouse-y" ) )
 483     {
 484         switch( p_vout->p_sys->i_mode )
 485         {
 486         case TRANSFORM_MODE_90:
 487             sentval.i_int = p_vout->p_sys->p_vout->output.i_height
 488                              - sentval.i_int;
 489         case TRANSFORM_MODE_270:
 490             var_Set( p_vout, "mouse-x", sentval );
 491             return VLC_SUCCESS;
 492
 493         case TRANSFORM_MODE_180:
 494         case TRANSFORM_MODE_VFLIP:
 495             sentval.i_int = p_vout->p_sys->p_vout->output.i_height
 496                              - sentval.i_int;
 497             break;
 498
 499         case TRANSFORM_MODE_HFLIP:
 500         default:
 501             break;
 502         }
 503     }
 504
 505     var_Set( p_vout, psz_var, sentval );
 506
 507     return VLC_SUCCESS;
 508 }
 509
 510 /*****************************************************************************
 511  * SendEventsToChild: forward events to the child/children vout
 512  *****************************************************************************/
 513 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 514                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 515 {
 516     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 517     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 518     return VLC_SUCCESS;
 519 }