git.sesse.net Git - vlc/blob - src/control/video.c

   1 /*****************************************************************************
   2  * video.c: libvlc new API video functions
   3  *****************************************************************************
   4  * Copyright (C) 2005 the VideoLAN team
   5  *
   6  * $Id$
   7  *
   8  * Authors: Clément Stenac <zorglub@videolan.org>
   9  *          Filippo Carone <littlejohn@videolan.org>
  10  *          Jean-Paul Saman <jpsaman _at_ m2x _dot_ nl>
  11  *          Damien Fouilleul <damienf a_t videolan dot org>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  26  *****************************************************************************/
  27
  28 #include "libvlc_internal.h"
  29
  30 #include <vlc/libvlc.h>
  31 #include <vlc_input.h>
  32 #include <vlc_vout.h>
  33
  34 /*
  35  * Remember to release the returned vout_thread_t.
  36  */
  37 static vout_thread_t *GetVout( libvlc_media_player_t *p_mi,
  38                                libvlc_exception_t *p_exception )
  39 {
  40     input_thread_t *p_input = libvlc_get_input_thread( p_mi, p_exception );
  41     vout_thread_t *p_vout = NULL;
  42
  43     if( p_input )
  44     {
  45         p_vout = input_GetVout( p_input );
  46         if( !p_vout )
  47         {
  48             libvlc_exception_raise( p_exception, "No active video output" );
  49         }
  50         vlc_object_release( p_input );
  51     }
  52     return p_vout;
  53 }
  54
  55 /**********************************************************************
  56  * Exported functions
  57  **********************************************************************/
  58
  59 void libvlc_set_fullscreen( libvlc_media_player_t *p_mi, int b_fullscreen,
  60                             libvlc_exception_t *p_e )
  61 {
  62     /* We only work on the first vout */
  63     vout_thread_t *p_vout = GetVout( p_mi, p_e );
  64
  65     /* GetVout will raise the exception for us */
  66     if( !p_vout ) return;
  67
  68     var_SetBool( p_vout, "fullscreen", b_fullscreen );
  69
  70     vlc_object_release( p_vout );
  71 }
  72
  73 int libvlc_get_fullscreen( libvlc_media_player_t *p_mi,
  74                             libvlc_exception_t *p_e )
  75 {
  76     /* We only work on the first vout */
  77     vout_thread_t *p_vout = GetVout( p_mi, p_e );
  78     int i_ret;
  79
  80     /* GetVout will raise the exception for us */
  81     if( !p_vout ) return 0;
  82
  83     i_ret = var_GetBool( p_vout, "fullscreen" );
  84
  85     vlc_object_release( p_vout );
  86
  87     return i_ret;
  88 }
  89
  90 void libvlc_toggle_fullscreen( libvlc_media_player_t *p_mi,
  91                                libvlc_exception_t *p_e )
  92 {
  93     /* We only work on the first vout */
  94     vout_thread_t *p_vout = GetVout( p_mi, p_e );
  95     bool ret;
  96
  97     /* GetVout will raise the exception for us */
  98     if( !p_vout ) return;
  99
 100     ret = var_GetBool( p_vout, "fullscreen" );
 101     var_SetBool( p_vout, "fullscreen", !ret );
 102
 103     vlc_object_release( p_vout );
 104 }
 105
 106 void
 107 libvlc_video_take_snapshot( libvlc_media_player_t *p_mi, const char *psz_filepath,
 108         unsigned int i_width, unsigned int i_height, libvlc_exception_t *p_e )
 109 {
 110     vout_thread_t *p_vout;
 111
 112     /* The filepath must be not NULL */
 113     if( !psz_filepath )
 114     {
 115         libvlc_exception_raise( p_e, "filepath is null" );
 116         return;
 117     }
 118     /* We must have an input */
 119     if( !p_mi->p_input_thread )
 120     {
 121         libvlc_exception_raise( p_e, "Input does not exist" );
 122         return;
 123     }
 124
 125     /* GetVout will raise the exception for us */
 126     p_vout = GetVout( p_mi, p_e );
 127     if( !p_vout ) return;
 128
 129     var_SetInteger( p_vout, "snapshot-width", i_width );
 130     var_SetInteger( p_vout, "snapshot-height", i_height );
 131
 132     var_SetString( p_vout, "snapshot-path", psz_filepath );
 133     var_SetString( p_vout, "snapshot-format", "png" );
 134
 135     var_TriggerCallback( p_vout, "video-snapshot" );
 136     vlc_object_release( p_vout );
 137 }
 138
 139 int libvlc_video_get_height( libvlc_media_player_t *p_mi,
 140                              libvlc_exception_t *p_e )
 141 {
 142     int height;
 143
 144     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 145     if( !p_vout ) return 0;
 146
 147     height = p_vout->i_window_height;
 148
 149     vlc_object_release( p_vout );
 150
 151     return height;
 152 }
 153
 154 int libvlc_video_get_width( libvlc_media_player_t *p_mi,
 155                             libvlc_exception_t *p_e )
 156 {
 157     int width;
 158
 159     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 160     if( !p_vout ) return 0;
 161
 162     width = p_vout->i_window_width;
 163
 164     vlc_object_release( p_vout );
 165
 166     return width;
 167 }
 168
 169 int libvlc_media_player_has_vout( libvlc_media_player_t *p_mi,
 170                                      libvlc_exception_t *p_e )
 171 {
 172     input_thread_t *p_input_thread = libvlc_get_input_thread(p_mi, p_e);
 173     bool has_vout = false;
 174
 175     if( p_input_thread )
 176     {
 177         vout_thread_t *p_vout;
 178
 179         p_vout = input_GetVout( p_input_thread );
 180         if( p_vout )
 181         {
 182             has_vout = true;
 183             vlc_object_release( p_vout );
 184         }
 185         vlc_object_release( p_input_thread );
 186     }
 187     return has_vout;
 188 }
 189
 190 float libvlc_video_get_scale( libvlc_media_player_t *p_mp,
 191                               libvlc_exception_t *p_e )
 192 {
 193     vout_thread_t *p_vout = GetVout( p_mp, p_e );
 194     if( !p_vout )
 195         return 0.;
 196
 197     float f_scale = var_GetFloat( p_vout, "scale" );
 198     if( var_GetBool( p_vout, "autoscale" ) )
 199         f_scale = 0.;
 200     vlc_object_release( p_vout );
 201     return f_scale;
 202 }
 203
 204 void libvlc_video_set_scale( libvlc_media_player_t *p_mp, float f_scale,
 205                              libvlc_exception_t *p_e )
 206 {
 207     vout_thread_t *p_vout = GetVout( p_mp, p_e );
 208     if( !p_vout )
 209         return;
 210
 211     if( f_scale != 0. )
 212         var_SetFloat( p_vout, "scale", f_scale );
 213     var_SetBool( p_vout, "autoscale", f_scale != 0. );
 214     vlc_object_release( p_vout );
 215 }
 216
 217 char *libvlc_video_get_aspect_ratio( libvlc_media_player_t *p_mi,
 218                                      libvlc_exception_t *p_e )
 219 {
 220     char *psz_aspect = 0;
 221     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 222
 223     if( !p_vout ) return 0;
 224
 225     psz_aspect = var_GetNonEmptyString( p_vout, "aspect-ratio" );
 226     vlc_object_release( p_vout );
 227     return psz_aspect ? psz_aspect : strdup("");
 228 }
 229
 230 void libvlc_video_set_aspect_ratio( libvlc_media_player_t *p_mi,
 231                                     char *psz_aspect, libvlc_exception_t *p_e )
 232 {
 233     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 234     int i_ret = -1;
 235
 236     if( !p_vout ) return;
 237
 238     i_ret = var_SetString( p_vout, "aspect-ratio", psz_aspect );
 239     if( i_ret )
 240         libvlc_exception_raise( p_e,
 241                         "Unexpected error while setting aspect-ratio value" );
 242
 243     vlc_object_release( p_vout );
 244 }
 245
 246 int libvlc_video_get_spu( libvlc_media_player_t *p_mi,
 247                           libvlc_exception_t *p_e )
 248 {
 249     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 250     vlc_value_t val_list;
 251     vlc_value_t val;
 252     int i_spu = -1;
 253     int i_ret = -1;
 254     int i;
 255
 256     if( !p_input_thread ) return -1;
 257
 258     i_ret = var_Get( p_input_thread, "spu-es", &val );
 259     if( i_ret < 0 )
 260     {
 261         libvlc_exception_raise( p_e, "Getting subtitle information failed" );
 262         vlc_object_release( p_input_thread );
 263         return i_ret;
 264     }
 265
 266     var_Change( p_input_thread, "spu-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 267     for( i = 0; i < val_list.p_list->i_count; i++ )
 268     {
 269         if( val.i_int == val_list.p_list->p_values[i].i_int )
 270         {
 271             i_spu = i;
 272             break;
 273         }
 274     }
 275     var_FreeList( &val_list, NULL );
 276     vlc_object_release( p_input_thread );
 277     return i_spu;
 278 }
 279
 280 int libvlc_video_get_spu_count( libvlc_media_player_t *p_mi,
 281                                 libvlc_exception_t *p_e )
 282 {
 283     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 284     int i_spu_count;
 285
 286     if( !p_input_thread )
 287         return -1;
 288
 289     i_spu_count = var_CountChoices( p_input_thread, "spu-es" );
 290
 291     vlc_object_release( p_input_thread );
 292     return i_spu_count;
 293 }
 294
 295 libvlc_track_description_t *
 296         libvlc_video_get_spu_description( libvlc_media_player_t *p_mi,
 297                                           libvlc_exception_t *p_e )
 298 {
 299     return libvlc_get_track_description( p_mi, "spu-es", p_e);
 300 }
 301
 302 void libvlc_video_set_spu( libvlc_media_player_t *p_mi, int i_spu,
 303                            libvlc_exception_t *p_e )
 304 {
 305     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 306     vlc_value_t val_list;
 307     vlc_value_t newval;
 308     int i_ret = -1;
 309
 310     if( !p_input_thread ) return;
 311
 312     var_Change( p_input_thread, "spu-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 313
 314     if( val_list.p_list->i_count == 0 )
 315     {
 316         libvlc_exception_raise( p_e, "Subtitle value out of range" );
 317         goto end;
 318     }
 319
 320     if( (i_spu < 0) && (i_spu > val_list.p_list->i_count) )
 321     {
 322         libvlc_exception_raise( p_e, "Subtitle value out of range" );
 323         goto end;
 324     }
 325
 326     newval = val_list.p_list->p_values[i_spu];
 327     i_ret = var_Set( p_input_thread, "spu-es", newval );
 328     if( i_ret < 0 )
 329     {
 330         libvlc_exception_raise( p_e, "Setting subtitle value failed" );
 331     }
 332
 333 end:
 334     var_FreeList( &val_list, NULL );
 335     vlc_object_release( p_input_thread );
 336 }
 337
 338 int libvlc_video_set_subtitle_file( libvlc_media_player_t *p_mi,
 339                                     char *psz_subtitle,
 340                                     libvlc_exception_t *p_e )
 341 {
 342     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
 343     bool b_ret = false;
 344
 345     if( p_input_thread )
 346     {
 347         if( !input_AddSubtitle( p_input_thread, psz_subtitle, true ) )
 348             b_ret = true;
 349         vlc_object_release( p_input_thread );
 350     }
 351     return b_ret;
 352 }
 353
 354 libvlc_track_description_t *
 355         libvlc_video_get_title_description( libvlc_media_player_t *p_mi,
 356                                             libvlc_exception_t * p_e )
 357 {
 358     return libvlc_get_track_description( p_mi, "title", p_e);
 359 }
 360
 361 libvlc_track_description_t *
 362         libvlc_video_get_chapter_description( libvlc_media_player_t *p_mi,
 363                                               int i_title,
 364                                               libvlc_exception_t *p_e )
 365 {
 366     char psz_title[12];
 367     sprintf( psz_title,  "title %2i", i_title );
 368     return libvlc_get_track_description( p_mi, psz_title, p_e);
 369 }
 370
 371 char *libvlc_video_get_crop_geometry( libvlc_media_player_t *p_mi,
 372                                    libvlc_exception_t *p_e )
 373 {
 374     char *psz_geometry = 0;
 375     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 376
 377     if( !p_vout ) return 0;
 378
 379     psz_geometry = var_GetNonEmptyString( p_vout, "crop" );
 380     vlc_object_release( p_vout );
 381     return psz_geometry ? psz_geometry : strdup("");
 382 }
 383
 384 void libvlc_video_set_crop_geometry( libvlc_media_player_t *p_mi,
 385                                     char *psz_geometry, libvlc_exception_t *p_e )
 386 {
 387     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 388     int i_ret = -1;
 389
 390     if( !p_vout ) return;
 391
 392     i_ret = var_SetString( p_vout, "crop", psz_geometry );
 393     if( i_ret )
 394         libvlc_exception_raise( p_e,
 395                         "Unexpected error while setting crop geometry" );
 396
 397     vlc_object_release( p_vout );
 398 }
 399
 400 int libvlc_video_get_teletext( libvlc_media_player_t *p_mi,
 401                                libvlc_exception_t *p_e )
 402 {
 403     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 404     vlc_object_t *p_vbi;
 405     int i_ret = -1;
 406
 407     if( !p_vout ) return i_ret;
 408
 409     p_vbi = (vlc_object_t *) vlc_object_find_name( p_vout, "zvbi",
 410                                                    FIND_CHILD );
 411     if( p_vbi )
 412     {
 413         i_ret = var_GetInteger( p_vbi, "vbi-page" );
 414         vlc_object_release( p_vbi );
 415     }
 416
 417     vlc_object_release( p_vout );
 418     return i_ret;
 419 }
 420
 421 void libvlc_video_set_teletext( libvlc_media_player_t *p_mi, int i_page,
 422                                 libvlc_exception_t *p_e )
 423 {
 424     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 425     vlc_object_t *p_vbi;
 426     int i_ret = -1;
 427
 428     if( !p_vout ) return;
 429
 430     p_vbi = (vlc_object_t *) vlc_object_find_name( p_vout, "zvbi",
 431                                                    FIND_CHILD );
 432     if( p_vbi )
 433     {
 434         i_ret = var_SetInteger( p_vbi, "vbi-page", i_page );
 435         vlc_object_release( p_vbi );
 436         if( i_ret )
 437             libvlc_exception_raise( p_e,
 438                             "Unexpected error while setting teletext page" );
 439     }
 440     vlc_object_release( p_vout );
 441 }
 442
 443 void libvlc_toggle_teletext( libvlc_media_player_t *p_mi,
 444                              libvlc_exception_t *p_e )
 445 {
 446     input_thread_t *p_input_thread;
 447     vlc_object_t *p_vbi;
 448     int i_ret;
 449
 450     p_input_thread = libvlc_get_input_thread(p_mi, p_e);
 451     if( !p_input_thread ) return;
 452
 453     if( var_CountChoices( p_input_thread, "teletext-es" ) <= 0 )
 454     {
 455         vlc_object_release( p_input_thread );
 456         return;
 457     }
 458     const bool b_selected = var_GetInteger( p_input_thread, "teletext-es" ) >= 0;
 459
 460     p_vbi = (vlc_object_t *)vlc_object_find_name( p_input_thread, "zvbi",
 461                                                   FIND_CHILD );
 462     if( p_vbi )
 463     {
 464         if( b_selected )
 465         {
 466             /* FIXME Gni, why that ? */
 467             i_ret = var_SetInteger( p_vbi, "vbi-page",
 468                                     var_GetInteger( p_vbi, "vbi-page" ) );
 469             if( i_ret )
 470                 libvlc_exception_raise( p_e,
 471                                 "Unexpected error while setting teletext page" );
 472         }
 473         else
 474         {
 475             /* FIXME Gni^2 */
 476             i_ret = var_SetBool( p_vbi, "vbi-opaque",
 477                                  !var_GetBool( p_vbi, "vbi-opaque" ) );
 478             if( i_ret )
 479                 libvlc_exception_raise( p_e,
 480                                 "Unexpected error while setting teletext transparency" );
 481         }
 482         vlc_object_release( p_vbi );
 483     }
 484     else if( b_selected )
 485     {
 486         var_SetInteger( p_input_thread, "spu-es", -1 );
 487     }
 488     else
 489     {
 490         vlc_value_t list;
 491         if( !var_Change( p_input_thread, "teletext-es", VLC_VAR_GETLIST, &list, NULL ) )
 492         {
 493             if( list.p_list->i_count > 0 )
 494                 var_SetInteger( p_input_thread, "spu-es", list.p_list->p_values[0].i_int );
 495
 496             var_FreeList( &list, NULL );
 497         }
 498     }
 499     vlc_object_release( p_input_thread );
 500 }
 501
 502 int libvlc_video_get_track_count( libvlc_media_player_t *p_mi,
 503                                   libvlc_exception_t *p_e )
 504 {
 505     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 506     int i_track_count;
 507
 508     if( !p_input_thread )
 509         return -1;
 510
 511     i_track_count = var_CountChoices( p_input_thread, "video-es" );
 512
 513     vlc_object_release( p_input_thread );
 514     return i_track_count;
 515 }
 516
 517 libvlc_track_description_t *
 518         libvlc_video_get_track_description( libvlc_media_player_t *p_mi,
 519                                             libvlc_exception_t *p_e )
 520 {
 521     return libvlc_get_track_description( p_mi, "video-es", p_e);
 522 }
 523
 524 int libvlc_video_get_track( libvlc_media_player_t *p_mi,
 525                             libvlc_exception_t *p_e )
 526 {
 527     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 528     vlc_value_t val_list;
 529     vlc_value_t val;
 530     int i_track = -1;
 531     int i_ret = -1;
 532     int i;
 533
 534     if( !p_input_thread )
 535         return -1;
 536
 537     i_ret = var_Get( p_input_thread, "video-es", &val );
 538     if( i_ret < 0 )
 539     {
 540         libvlc_exception_raise( p_e, "Getting Video track information failed" );
 541         vlc_object_release( p_input_thread );
 542         return i_ret;
 543     }
 544
 545     var_Change( p_input_thread, "video-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 546     for( i = 0; i < val_list.p_list->i_count; i++ )
 547     {
 548         if( val_list.p_list->p_values[i].i_int == val.i_int )
 549         {
 550             i_track = i;
 551             break;
 552         }
 553     }
 554     var_FreeList( &val_list, NULL );
 555     vlc_object_release( p_input_thread );
 556     return i_track;
 557 }
 558
 559 void libvlc_video_set_track( libvlc_media_player_t *p_mi, int i_track,
 560                              libvlc_exception_t *p_e )
 561 {
 562     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 563     vlc_value_t val_list;
 564     int i_ret = -1;
 565     int i;
 566
 567     if( !p_input_thread )
 568         return;
 569
 570     var_Change( p_input_thread, "video-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 571     for( i = 0; i < val_list.p_list->i_count; i++ )
 572     {
 573         vlc_value_t val = val_list.p_list->p_values[i];
 574         if( i_track == val.i_int )
 575         {
 576             i_ret = var_Set( p_input_thread, "audio-es", val );
 577             if( i_ret < 0 )
 578                 libvlc_exception_raise( p_e, "Setting video track failed" );
 579             goto end;
 580         }
 581     }
 582     libvlc_exception_raise( p_e, "Video track out of range" );
 583
 584 end:
 585     var_FreeList( &val_list, NULL );
 586     vlc_object_release( p_input_thread );
 587 }