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
  28 #include <vlc/vlc.h>
  29 #include <vlc_vout.h>
  30
  31 #include "filter_common.h"
  32
  33 #define TRANSFORM_MODE_HFLIP   1
  34 #define TRANSFORM_MODE_VFLIP   2
  35 #define TRANSFORM_MODE_90      3
  36 #define TRANSFORM_MODE_180     4
  37 #define TRANSFORM_MODE_270     5
  38
  39 /*****************************************************************************
  40  * Local prototypes
  41  *****************************************************************************/
  42 static int  Create    ( vlc_object_t * );
  43 static void Destroy   ( vlc_object_t * );
  44
  45 static int  Init      ( vout_thread_t * );
  46 static void End       ( vout_thread_t * );
  47 static void Render    ( vout_thread_t *, picture_t * );
  48
  49 static int  SendEvents( vlc_object_t *, char const *,
  50                         vlc_value_t, vlc_value_t, void * );
  51
  52 /*****************************************************************************
  53  * Module descriptor
  54  *****************************************************************************/
  55 #define TYPE_TEXT N_("Transform type")
  56 #define TYPE_LONGTEXT N_("One of '90', '180', '270', 'hflip' and 'vflip'")
  57
  58 static const char *type_list[] = { "90", "180", "270", "hflip", "vflip" };
  59 static const char *type_list_text[] = { N_("Rotate by 90 degrees"),
  60   N_("Rotate by 180 degrees"), N_("Rotate by 270 degrees"),
  61   N_("Flip horizontally"), N_("Flip vertically") };
  62
  63 #define CFG_PREFIX "transform-"
  64
  65 vlc_module_begin();
  66     set_description( _("Video transformation filter") );
  67     set_shortname( _("Transformation"));
  68     set_capability( "video filter", 0 );
  69     set_category( CAT_VIDEO );
  70     set_subcategory( SUBCAT_VIDEO_VFILTER );
  71
  72     add_string( CFG_PREFIX "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 static const char *ppsz_filter_options[] = {
  81     "type", NULL
  82 };
  83
  84 /*****************************************************************************
  85  * vout_sys_t: Transform video output method descriptor
  86  *****************************************************************************
  87  * This structure is part of the video output thread descriptor.
  88  * It describes the Transform specific properties of an output thread.
  89  *****************************************************************************/
  90 struct vout_sys_t
  91 {
  92     int i_mode;
  93     vlc_bool_t b_rotation;
  94     vout_thread_t *p_vout;
  95 };
  96
  97 /*****************************************************************************
  98  * Control: control facility for the vout (forwards to child vout)
  99  *****************************************************************************/
 100 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 101 {
 102     return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
 103 }
 104
 105 /*****************************************************************************
 106  * Create: allocates Transform video thread output method
 107  *****************************************************************************
 108  * This function allocates and initializes a Transform vout method.
 109  *****************************************************************************/
 110 static int Create( vlc_object_t *p_this )
 111 {
 112     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 113     char *psz_method;
 114
 115     /* Allocate structure */
 116     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 117     if( p_vout->p_sys == NULL )
 118     {
 119         msg_Err( p_vout, "out of memory" );
 120         return VLC_ENOMEM;
 121     }
 122
 123     p_vout->pf_init = Init;
 124     p_vout->pf_end = End;
 125     p_vout->pf_manage = NULL;
 126     p_vout->pf_render = Render;
 127     p_vout->pf_display = NULL;
 128     p_vout->pf_control = Control;
 129
 130     config_ChainParse( p_vout, CFG_PREFIX, ppsz_filter_options,
 131                            p_vout->p_cfg );
 132
 133     /* Look what method was requested */
 134     psz_method = var_CreateGetNonEmptyString( p_vout, "transform-type" );
 135
 136     if( psz_method == NULL )
 137     {
 138         msg_Err( p_vout, "configuration variable %s empty", "transform-type" );
 139         msg_Err( p_vout, "no valid transform mode provided, using '90'" );
 140         p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
 141         p_vout->p_sys->b_rotation = 1;
 142     }
 143     else
 144     {
 145         if( !strcmp( psz_method, "hflip" ) )
 146         {
 147             p_vout->p_sys->i_mode = TRANSFORM_MODE_HFLIP;
 148             p_vout->p_sys->b_rotation = 0;
 149         }
 150         else if( !strcmp( psz_method, "vflip" ) )
 151         {
 152             p_vout->p_sys->i_mode = TRANSFORM_MODE_VFLIP;
 153             p_vout->p_sys->b_rotation = 0;
 154         }
 155         else if( !strcmp( psz_method, "90" ) )
 156         {
 157             p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
 158             p_vout->p_sys->b_rotation = 1;
 159         }
 160         else if( !strcmp( psz_method, "180" ) )
 161         {
 162             p_vout->p_sys->i_mode = TRANSFORM_MODE_180;
 163             p_vout->p_sys->b_rotation = 0;
 164         }
 165         else if( !strcmp( psz_method, "270" ) )
 166         {
 167             p_vout->p_sys->i_mode = TRANSFORM_MODE_270;
 168             p_vout->p_sys->b_rotation = 1;
 169         }
 170         else
 171         {
 172             msg_Err( p_vout, "no valid transform mode provided, using '90'" );
 173             p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
 174             p_vout->p_sys->b_rotation = 1;
 175         }
 176
 177         free( psz_method );
 178     }
 179
 180     return VLC_SUCCESS;
 181 }
 182
 183 /*****************************************************************************
 184  * Init: initialize Transform video thread output method
 185  *****************************************************************************/
 186 static int Init( vout_thread_t *p_vout )
 187 {
 188     int i_index;
 189     picture_t *p_pic;
 190     video_format_t fmt;
 191
 192     I_OUTPUTPICTURES = 0;
 193     memset( &fmt, 0, sizeof(video_format_t) );
 194
 195     /* Initialize the output structure */
 196     p_vout->output.i_chroma = p_vout->render.i_chroma;
 197     p_vout->output.i_width  = p_vout->render.i_width;
 198     p_vout->output.i_height = p_vout->render.i_height;
 199     p_vout->output.i_aspect = p_vout->render.i_aspect;
 200     p_vout->fmt_out = p_vout->fmt_in;
 201     fmt = p_vout->fmt_out;
 202
 203     /* Try to open the real video output */
 204     msg_Dbg( p_vout, "spawning the real video output" );
 205
 206     if( p_vout->p_sys->b_rotation )
 207     {
 208         fmt.i_width = p_vout->fmt_out.i_height;
 209         fmt.i_visible_width = p_vout->fmt_out.i_visible_height;
 210         fmt.i_x_offset = p_vout->fmt_out.i_y_offset;
 211
 212         fmt.i_height = p_vout->fmt_out.i_width;
 213         fmt.i_visible_height = p_vout->fmt_out.i_visible_width;
 214         fmt.i_y_offset = p_vout->fmt_out.i_x_offset;
 215
 216         fmt.i_aspect = VOUT_ASPECT_FACTOR *
 217             (uint64_t)VOUT_ASPECT_FACTOR / fmt.i_aspect;
 218
 219         fmt.i_sar_num = p_vout->fmt_out.i_sar_den;
 220         fmt.i_sar_den = p_vout->fmt_out.i_sar_num;
 221     }
 222
 223     p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 224
 225     /* Everything failed */
 226     if( p_vout->p_sys->p_vout == NULL )
 227     {
 228         msg_Err( p_vout, "cannot open vout, aborting" );
 229         return VLC_EGENERIC;
 230     }
 231
 232     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 233
 234     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 235
 236     ADD_PARENT_CALLBACKS( SendEventsToChild );
 237
 238     return VLC_SUCCESS;
 239 }
 240
 241 /*****************************************************************************
 242  * End: terminate Transform video thread output method
 243  *****************************************************************************/
 244 static void End( vout_thread_t *p_vout )
 245 {
 246     int i_index;
 247
 248     /* Free the fake output buffers we allocated */
 249     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 250     {
 251         i_index--;
 252         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 253     }
 254 }
 255
 256 /*****************************************************************************
 257  * Destroy: destroy Transform video thread output method
 258  *****************************************************************************
 259  * Terminate an output method created by TransformCreateOutputMethod
 260  *****************************************************************************/
 261 static void Destroy( vlc_object_t *p_this )
 262 {
 263     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 264
 265     if( p_vout->p_sys->p_vout )
 266     {
 267         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 268         vlc_object_detach( p_vout->p_sys->p_vout );
 269         vout_Destroy( p_vout->p_sys->p_vout );
 270     }
 271
 272     DEL_PARENT_CALLBACKS( SendEventsToChild );
 273
 274     free( p_vout->p_sys );
 275 }
 276
 277 /*****************************************************************************
 278  * Render: displays previously rendered output
 279  *****************************************************************************
 280  * This function send the currently rendered image to Transform image, waits
 281  * until it is displayed and switch the two rendering buffers, preparing next
 282  * frame.
 283  *****************************************************************************/
 284 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 285 {
 286     picture_t *p_outpic;
 287     int i_index;
 288
 289     /* This is a new frame. Get a structure from the video_output. */
 290     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 291               == NULL )
 292     {
 293         if( p_vout->b_die || p_vout->b_error )
 294         {
 295             return;
 296         }
 297         msleep( VOUT_OUTMEM_SLEEP );
 298     }
 299
 300     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 301     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 302
 303     switch( p_vout->p_sys->i_mode )
 304     {
 305         case TRANSFORM_MODE_90:
 306             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 307             {
 308                 int i_pitch = p_pic->p[i_index].i_pitch;
 309
 310                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 311
 312                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 313                 uint8_t *p_out_end = p_out +
 314                     p_outpic->p[i_index].i_visible_lines *
 315                     p_outpic->p[i_index].i_pitch;
 316
 317                 for( ; p_out < p_out_end ; )
 318                 {
 319                     uint8_t *p_line_end;
 320
 321                     p_out_end -= p_outpic->p[i_index].i_pitch
 322                                   - p_outpic->p[i_index].i_visible_pitch;
 323                     p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
 324                         i_pitch;
 325
 326                     for( ; p_in < p_line_end ; )
 327                     {
 328                         p_line_end -= i_pitch;
 329                         *(--p_out_end) = *p_line_end;
 330                     }
 331
 332                     p_in++;
 333                 }
 334             }
 335             break;
 336
 337         case TRANSFORM_MODE_180:
 338             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 339             {
 340                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 341                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 342                                             * p_pic->p[i_index].i_pitch;
 343
 344                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 345
 346                 for( ; p_in < p_in_end ; )
 347                 {
 348                     uint8_t *p_line_start = p_in_end
 349                                              - p_pic->p[i_index].i_pitch;
 350                     p_in_end -= p_pic->p[i_index].i_pitch
 351                                  - p_pic->p[i_index].i_visible_pitch;
 352
 353                     for( ; p_line_start < p_in_end ; )
 354                     {
 355                         *p_out++ = *(--p_in_end);
 356                     }
 357
 358                     p_out += p_outpic->p[i_index].i_pitch
 359                               - p_outpic->p[i_index].i_visible_pitch;
 360                 }
 361             }
 362             break;
 363
 364         case TRANSFORM_MODE_270:
 365             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 366             {
 367                 int i_pitch = p_pic->p[i_index].i_pitch;
 368
 369                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 370
 371                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 372                 uint8_t *p_out_end = p_out +
 373                     p_outpic->p[i_index].i_visible_lines *
 374                     p_outpic->p[i_index].i_pitch;
 375
 376                 for( ; p_out < p_out_end ; )
 377                 {
 378                     uint8_t *p_in_end;
 379
 380                     p_in_end = p_in + p_pic->p[i_index].i_visible_lines *
 381                         i_pitch;
 382
 383                     for( ; p_in < p_in_end ; )
 384                     {
 385                         p_in_end -= i_pitch;
 386                         *p_out++ = *p_in_end;
 387                     }
 388
 389                     p_out += p_outpic->p[i_index].i_pitch
 390                               - p_outpic->p[i_index].i_visible_pitch;
 391                     p_in++;
 392                 }
 393             }
 394             break;
 395
 396         case TRANSFORM_MODE_HFLIP:
 397             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 398             {
 399                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 400                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 401                                             * p_pic->p[i_index].i_pitch;
 402
 403                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 404
 405                 for( ; p_in < p_in_end ; )
 406                 {
 407                     p_in_end -= p_pic->p[i_index].i_pitch;
 408                     p_vout->p_libvlc->pf_memcpy( p_out, p_in_end,
 409                                            p_pic->p[i_index].i_visible_pitch );
 410                     p_out += p_pic->p[i_index].i_pitch;
 411                 }
 412             }
 413             break;
 414
 415         case TRANSFORM_MODE_VFLIP:
 416             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 417             {
 418                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 419                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 420                                             * p_pic->p[i_index].i_pitch;
 421
 422                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 423
 424                 for( ; p_in < p_in_end ; )
 425                 {
 426                     uint8_t *p_line_end = p_in
 427                                            + p_pic->p[i_index].i_visible_pitch;
 428
 429                     for( ; p_in < p_line_end ; )
 430                     {
 431                         *p_out++ = *(--p_line_end);
 432                     }
 433
 434                     p_in += p_pic->p[i_index].i_pitch;
 435                 }
 436             }
 437             break;
 438
 439         default:
 440             break;
 441     }
 442
 443     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 444
 445     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 446 }
 447
 448 /*****************************************************************************
 449  * SendEvents: forward mouse and keyboard events to the parent p_vout
 450  *****************************************************************************/
 451 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 452                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 453 {
 454     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 455     vlc_value_t sentval = newval;
 456
 457     /* Translate the mouse coordinates */
 458     if( !strcmp( psz_var, "mouse-x" ) )
 459     {
 460         switch( p_vout->p_sys->i_mode )
 461         {
 462         case TRANSFORM_MODE_270:
 463             sentval.i_int = p_vout->p_sys->p_vout->output.i_width
 464                              - sentval.i_int;
 465         case TRANSFORM_MODE_90:
 466             var_Set( p_vout, "mouse-y", sentval );
 467             return VLC_SUCCESS;
 468
 469         case TRANSFORM_MODE_180:
 470         case TRANSFORM_MODE_HFLIP:
 471             sentval.i_int = p_vout->p_sys->p_vout->output.i_width
 472                              - sentval.i_int;
 473             break;
 474
 475         case TRANSFORM_MODE_VFLIP:
 476         default:
 477             break;
 478         }
 479     }
 480     else if( !strcmp( psz_var, "mouse-y" ) )
 481     {
 482         switch( p_vout->p_sys->i_mode )
 483         {
 484         case TRANSFORM_MODE_90:
 485             sentval.i_int = p_vout->p_sys->p_vout->output.i_height
 486                              - sentval.i_int;
 487         case TRANSFORM_MODE_270:
 488             var_Set( p_vout, "mouse-x", sentval );
 489             return VLC_SUCCESS;
 490
 491         case TRANSFORM_MODE_180:
 492         case TRANSFORM_MODE_VFLIP:
 493             sentval.i_int = p_vout->p_sys->p_vout->output.i_height
 494                              - sentval.i_int;
 495             break;
 496
 497         case TRANSFORM_MODE_HFLIP:
 498         default:
 499             break;
 500         }
 501     }
 502
 503     var_Set( p_vout, psz_var, sentval );
 504
 505     return VLC_SUCCESS;
 506 }
 507
 508 /*****************************************************************************
 509  * SendEventsToChild: forward events to the child/children vout
 510  *****************************************************************************/
 511 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 512                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 513 {
 514     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 515     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 516     return VLC_SUCCESS;
 517 }