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