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     video_format_t fmt = {0};
 184
 185     I_OUTPUTPICTURES = 0;
 186
 187     /* Initialize the output structure */
 188     p_vout->output.i_chroma = p_vout->render.i_chroma;
 189     p_vout->output.i_width  = p_vout->render.i_width;
 190     p_vout->output.i_height = p_vout->render.i_height;
 191     p_vout->output.i_aspect = p_vout->render.i_aspect;
 192
 193     fmt.i_width = fmt.i_visible_width = p_vout->render.i_width;
 194     fmt.i_height = fmt.i_visible_height = p_vout->render.i_height;
 195     fmt.i_x_offset = fmt.i_y_offset = 0;
 196     fmt.i_chroma = p_vout->render.i_chroma;
 197     fmt.i_aspect = p_vout->render.i_aspect;
 198     fmt.i_sar_num = p_vout->render.i_aspect * fmt.i_height / fmt.i_width;
 199     fmt.i_sar_den = VOUT_ASPECT_FACTOR;
 200
 201     /* Try to open the real video output */
 202     msg_Dbg( p_vout, "spawning the real video output" );
 203
 204     if( p_vout->p_sys->b_rotation )
 205     {
 206         fmt.i_width = fmt.i_visible_width = p_vout->render.i_height;
 207         fmt.i_height = fmt.i_visible_height = p_vout->render.i_width;
 208         fmt.i_aspect = VOUT_ASPECT_FACTOR *
 209             (uint64_t)VOUT_ASPECT_FACTOR / p_vout->render.i_aspect;
 210         fmt.i_sar_num = VOUT_ASPECT_FACTOR;
 211         fmt.i_sar_den = p_vout->render.i_aspect * fmt.i_height / fmt.i_width;
 212
 213         p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 214     }
 215     else
 216     {
 217         p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
 218     }
 219
 220     /* Everything failed */
 221     if( p_vout->p_sys->p_vout == NULL )
 222     {
 223         msg_Err( p_vout, "cannot open vout, aborting" );
 224         return VLC_EGENERIC;
 225     }
 226
 227     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 228
 229     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 230
 231     ADD_PARENT_CALLBACKS( SendEventsToChild );
 232
 233     return VLC_SUCCESS;
 234 }
 235
 236 /*****************************************************************************
 237  * End: terminate Transform video thread output method
 238  *****************************************************************************/
 239 static void End( vout_thread_t *p_vout )
 240 {
 241     int i_index;
 242
 243     /* Free the fake output buffers we allocated */
 244     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 245     {
 246         i_index--;
 247         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 248     }
 249 }
 250
 251 /*****************************************************************************
 252  * Destroy: destroy Transform video thread output method
 253  *****************************************************************************
 254  * Terminate an output method created by TransformCreateOutputMethod
 255  *****************************************************************************/
 256 static void Destroy( vlc_object_t *p_this )
 257 {
 258     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 259
 260     if( p_vout->p_sys->p_vout )
 261     {
 262         DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 263         vlc_object_detach( p_vout->p_sys->p_vout );
 264         vout_Destroy( p_vout->p_sys->p_vout );
 265     }
 266
 267     DEL_PARENT_CALLBACKS( SendEventsToChild );
 268
 269     free( p_vout->p_sys );
 270 }
 271
 272 /*****************************************************************************
 273  * Render: displays previously rendered output
 274  *****************************************************************************
 275  * This function send the currently rendered image to Transform image, waits
 276  * until it is displayed and switch the two rendering buffers, preparing next
 277  * frame.
 278  *****************************************************************************/
 279 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 280 {
 281     picture_t *p_outpic;
 282     int i_index;
 283
 284     /* This is a new frame. Get a structure from the video_output. */
 285     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 286               == NULL )
 287     {
 288         if( p_vout->b_die || p_vout->b_error )
 289         {
 290             return;
 291         }
 292         msleep( VOUT_OUTMEM_SLEEP );
 293     }
 294
 295     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 296     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 297
 298     switch( p_vout->p_sys->i_mode )
 299     {
 300         case TRANSFORM_MODE_90:
 301             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 302             {
 303                 int i_pitch = p_pic->p[i_index].i_pitch;
 304
 305                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 306
 307                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 308                 uint8_t *p_out_end = p_out +
 309                     p_outpic->p[i_index].i_visible_lines *
 310                     p_outpic->p[i_index].i_pitch;
 311
 312                 for( ; p_out < p_out_end ; )
 313                 {
 314                     uint8_t *p_line_end;
 315
 316                     p_out_end -= p_outpic->p[i_index].i_pitch
 317                                   - p_outpic->p[i_index].i_visible_pitch;
 318                     p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
 319                         i_pitch;
 320
 321                     for( ; p_in < p_line_end ; )
 322                     {
 323                         p_line_end -= i_pitch;
 324                         *(--p_out_end) = *p_line_end;
 325                     }
 326
 327                     p_in++;
 328                 }
 329             }
 330             break;
 331
 332         case TRANSFORM_MODE_180:
 333             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 334             {
 335                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 336                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 337                                             * p_pic->p[i_index].i_pitch;
 338
 339                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 340
 341                 for( ; p_in < p_in_end ; )
 342                 {
 343                     uint8_t *p_line_start = p_in_end
 344                                              - p_pic->p[i_index].i_pitch;
 345                     p_in_end -= p_pic->p[i_index].i_pitch
 346                                  - p_pic->p[i_index].i_visible_pitch;
 347
 348                     for( ; p_line_start < p_in_end ; )
 349                     {
 350                         *p_out++ = *(--p_in_end);
 351                     }
 352
 353                     p_out += p_outpic->p[i_index].i_pitch
 354                               - p_outpic->p[i_index].i_visible_pitch;
 355                 }
 356             }
 357             break;
 358
 359         case TRANSFORM_MODE_270:
 360             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 361             {
 362                 int i_pitch = p_pic->p[i_index].i_pitch;
 363
 364                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 365
 366                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 367                 uint8_t *p_out_end = p_out +
 368                     p_outpic->p[i_index].i_visible_lines *
 369                     p_outpic->p[i_index].i_pitch;
 370
 371                 for( ; p_out < p_out_end ; )
 372                 {
 373                     uint8_t *p_in_end;
 374
 375                     p_in_end = p_in + p_pic->p[i_index].i_visible_lines *
 376                         i_pitch;
 377
 378                     for( ; p_in < p_in_end ; )
 379                     {
 380                         p_in_end -= i_pitch;
 381                         *p_out++ = *p_in_end;
 382                     }
 383
 384                     p_out += p_outpic->p[i_index].i_pitch
 385                               - p_outpic->p[i_index].i_visible_pitch;
 386                     p_in++;
 387                 }
 388             }
 389             break;
 390
 391         case TRANSFORM_MODE_HFLIP:
 392             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 393             {
 394                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 395                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 396                                             * p_pic->p[i_index].i_pitch;
 397
 398                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 399
 400                 for( ; p_in < p_in_end ; )
 401                 {
 402                     p_in_end -= p_pic->p[i_index].i_pitch;
 403                     p_vout->p_vlc->pf_memcpy( p_out, p_in_end,
 404                                            p_pic->p[i_index].i_visible_pitch );
 405                     p_out += p_pic->p[i_index].i_pitch;
 406                 }
 407             }
 408             break;
 409
 410         case TRANSFORM_MODE_VFLIP:
 411             for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 412             {
 413                 uint8_t *p_in = p_pic->p[i_index].p_pixels;
 414                 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
 415                                             * p_pic->p[i_index].i_pitch;
 416
 417                 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
 418
 419                 for( ; p_in < p_in_end ; )
 420                 {
 421                     uint8_t *p_line_end = p_in
 422                                            + p_pic->p[i_index].i_visible_pitch;
 423
 424                     for( ; p_in < p_line_end ; )
 425                     {
 426                         *p_out++ = *(--p_line_end);
 427                     }
 428
 429                     p_in += p_pic->p[i_index].i_pitch;
 430                 }
 431             }
 432             break;
 433
 434         default:
 435             break;
 436     }
 437
 438     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 439
 440     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 441 }
 442
 443 /*****************************************************************************
 444  * SendEvents: forward mouse and keyboard events to the parent p_vout
 445  *****************************************************************************/
 446 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 447                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
 448 {
 449     vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
 450     vlc_value_t sentval = newval;
 451
 452     /* Translate the mouse coordinates */
 453     if( !strcmp( psz_var, "mouse-x" ) )
 454     {
 455         switch( p_vout->p_sys->i_mode )
 456         {
 457         case TRANSFORM_MODE_270:
 458             sentval.i_int = p_vout->p_sys->p_vout->output.i_width
 459                              - sentval.i_int;
 460         case TRANSFORM_MODE_90:
 461             var_Set( p_vout, "mouse-y", sentval );
 462             return VLC_SUCCESS;
 463
 464         case TRANSFORM_MODE_180:
 465         case TRANSFORM_MODE_HFLIP:
 466             sentval.i_int = p_vout->p_sys->p_vout->output.i_width
 467                              - sentval.i_int;
 468             break;
 469
 470         case TRANSFORM_MODE_VFLIP:
 471         default:
 472             break;
 473         }
 474     }
 475     else if( !strcmp( psz_var, "mouse-y" ) )
 476     {
 477         switch( p_vout->p_sys->i_mode )
 478         {
 479         case TRANSFORM_MODE_90:
 480             sentval.i_int = p_vout->p_sys->p_vout->output.i_height
 481                              - sentval.i_int;
 482         case TRANSFORM_MODE_270:
 483             var_Set( p_vout, "mouse-x", sentval );
 484             return VLC_SUCCESS;
 485
 486         case TRANSFORM_MODE_180:
 487         case TRANSFORM_MODE_VFLIP:
 488             sentval.i_int = p_vout->p_sys->p_vout->output.i_height
 489                              - sentval.i_int;
 490             break;
 491
 492         case TRANSFORM_MODE_HFLIP:
 493         default:
 494             break;
 495         }
 496     }
 497
 498     var_Set( p_vout, psz_var, sentval );
 499
 500     return VLC_SUCCESS;
 501 }
 502
 503 /*****************************************************************************
 504  * SendEventsToChild: forward events to the child/children vout
 505  *****************************************************************************/
 506 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 507                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 508 {
 509     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 510     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 511     return VLC_SUCCESS;
 512 }