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_Change( p_input_thread, "spu-es", VLC_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     vlc_value_t val_list;
 285     int i_spu_count;
 286
 287     if( !p_input_thread )
 288         return -1;
 289
 290     var_Change( p_input_thread, "spu-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 291     i_spu_count = val_list.p_list->i_count;
 292     var_Change( p_input_thread, "spu-es", VLC_VAR_FREELIST, &val_list, NULL );
 293
 294     vlc_object_release( p_input_thread );
 295     return i_spu_count;
 296 }
 297
 298 libvlc_track_description_t *
 299         libvlc_video_get_spu_description( libvlc_media_player_t *p_mi,
 300                                           libvlc_exception_t *p_e )
 301 {
 302     return libvlc_get_track_description( p_mi, "spu-es", p_e);
 303 }
 304
 305 void libvlc_video_set_spu( libvlc_media_player_t *p_mi, int i_spu,
 306                            libvlc_exception_t *p_e )
 307 {
 308     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 309     vlc_value_t val_list;
 310     vlc_value_t newval;
 311     int i_ret = -1;
 312
 313     if( !p_input_thread ) return;
 314
 315     var_Change( p_input_thread, "spu-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 316
 317     if( val_list.p_list->i_count == 0 )
 318     {
 319         libvlc_exception_raise( p_e, "Subtitle value out of range" );
 320         goto end;
 321     }
 322
 323     if( (i_spu < 0) && (i_spu > val_list.p_list->i_count) )
 324     {
 325         libvlc_exception_raise( p_e, "Subtitle value out of range" );
 326         goto end;
 327     }
 328
 329     newval = val_list.p_list->p_values[i_spu];
 330     i_ret = var_Set( p_input_thread, "spu-es", newval );
 331     if( i_ret < 0 )
 332     {
 333         libvlc_exception_raise( p_e, "Setting subtitle value failed" );
 334     }
 335
 336 end:
 337     var_Change( p_input_thread, "spu-es", VLC_VAR_FREELIST, &val_list, NULL );
 338     vlc_object_release( p_input_thread );
 339 }
 340
 341 int libvlc_video_set_subtitle_file( libvlc_media_player_t *p_mi,
 342                                     char *psz_subtitle,
 343                                     libvlc_exception_t *p_e )
 344 {
 345     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi, p_e );
 346     bool b_ret = false;
 347
 348     if( p_input_thread )
 349     {
 350         if( !input_AddSubtitle( p_input_thread, psz_subtitle, true ) )
 351             b_ret = true;
 352         vlc_object_release( p_input_thread );
 353     }
 354     return b_ret;
 355 }
 356
 357 libvlc_track_description_t *
 358         libvlc_video_get_title_description( libvlc_media_player_t *p_mi,
 359                                             libvlc_exception_t * p_e )
 360 {
 361     return libvlc_get_track_description( p_mi, "title", p_e);
 362 }
 363
 364 libvlc_track_description_t *
 365         libvlc_video_get_chapter_description( libvlc_media_player_t *p_mi,
 366                                               int i_title,
 367                                               libvlc_exception_t *p_e )
 368 {
 369     char psz_title[12];
 370     sprintf( psz_title,  "title %2i", i_title );
 371     return libvlc_get_track_description( p_mi, psz_title, p_e);
 372 }
 373
 374 char *libvlc_video_get_crop_geometry( libvlc_media_player_t *p_mi,
 375                                    libvlc_exception_t *p_e )
 376 {
 377     char *psz_geometry = 0;
 378     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 379
 380     if( !p_vout ) return 0;
 381
 382     psz_geometry = var_GetNonEmptyString( p_vout, "crop" );
 383     vlc_object_release( p_vout );
 384     return psz_geometry ? psz_geometry : strdup("");
 385 }
 386
 387 void libvlc_video_set_crop_geometry( libvlc_media_player_t *p_mi,
 388                                     char *psz_geometry, libvlc_exception_t *p_e )
 389 {
 390     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 391     int i_ret = -1;
 392
 393     if( !p_vout ) return;
 394
 395     i_ret = var_SetString( p_vout, "crop", psz_geometry );
 396     if( i_ret )
 397         libvlc_exception_raise( p_e,
 398                         "Unexpected error while setting crop geometry" );
 399
 400     vlc_object_release( p_vout );
 401 }
 402
 403 int libvlc_video_get_teletext( libvlc_media_player_t *p_mi,
 404                                libvlc_exception_t *p_e )
 405 {
 406     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 407     vlc_object_t *p_vbi;
 408     int i_ret = -1;
 409
 410     if( !p_vout ) return i_ret;
 411
 412     p_vbi = (vlc_object_t *) vlc_object_find_name( p_vout, "zvbi",
 413                                                    FIND_CHILD );
 414     if( p_vbi )
 415     {
 416         i_ret = var_GetInteger( p_vbi, "vbi-page" );
 417         vlc_object_release( p_vbi );
 418     }
 419
 420     vlc_object_release( p_vout );
 421     return i_ret;
 422 }
 423
 424 void libvlc_video_set_teletext( libvlc_media_player_t *p_mi, int i_page,
 425                                 libvlc_exception_t *p_e )
 426 {
 427     vout_thread_t *p_vout = GetVout( p_mi, p_e );
 428     vlc_object_t *p_vbi;
 429     int i_ret = -1;
 430
 431     if( !p_vout ) return;
 432
 433     p_vbi = (vlc_object_t *) vlc_object_find_name( p_vout, "zvbi",
 434                                                    FIND_CHILD );
 435     if( p_vbi )
 436     {
 437         i_ret = var_SetInteger( p_vbi, "vbi-page", i_page );
 438         vlc_object_release( p_vbi );
 439         if( i_ret )
 440             libvlc_exception_raise( p_e,
 441                             "Unexpected error while setting teletext page" );
 442     }
 443     vlc_object_release( p_vout );
 444 }
 445
 446 void libvlc_toggle_teletext( libvlc_media_player_t *p_mi,
 447                              libvlc_exception_t *p_e )
 448 {
 449     input_thread_t *p_input_thread;
 450     vlc_object_t *p_vbi;
 451     int i_ret;
 452
 453     p_input_thread = libvlc_get_input_thread(p_mi, p_e);
 454     if( !p_input_thread ) return;
 455
 456     if( var_CountChoices( p_input_thread, "teletext-es" ) <= 0 )
 457     {
 458         vlc_object_release( p_input_thread );
 459         return;
 460     }
 461     const bool b_selected = var_GetInteger( p_input_thread, "teletext-es" ) >= 0;
 462
 463     p_vbi = (vlc_object_t *)vlc_object_find_name( p_input_thread, "zvbi",
 464                                                   FIND_CHILD );
 465     if( p_vbi )
 466     {
 467         if( b_selected )
 468         {
 469             /* FIXME Gni, why that ? */
 470             i_ret = var_SetInteger( p_vbi, "vbi-page",
 471                                     var_GetInteger( p_vbi, "vbi-page" ) );
 472             if( i_ret )
 473                 libvlc_exception_raise( p_e,
 474                                 "Unexpected error while setting teletext page" );
 475         }
 476         else
 477         {
 478             /* FIXME Gni^2 */
 479             i_ret = var_SetBool( p_vbi, "vbi-opaque",
 480                                  !var_GetBool( p_vbi, "vbi-opaque" ) );
 481             if( i_ret )
 482                 libvlc_exception_raise( p_e,
 483                                 "Unexpected error while setting teletext transparency" );
 484         }
 485         vlc_object_release( p_vbi );
 486     }
 487     else if( b_selected )
 488     {
 489         var_SetInteger( p_input_thread, "spu-es", -1 );
 490     }
 491     else
 492     {
 493         vlc_value_t list;
 494         if( !var_Change( p_input_thread, "teletext-es", VLC_VAR_GETLIST, &list, NULL ) )
 495         {
 496             if( list.p_list->i_count > 0 )
 497                 var_SetInteger( p_input_thread, "spu-es", list.p_list->p_values[0].i_int );
 498
 499             var_Change( p_input_thread, "teletext-es", VLC_VAR_FREELIST, &list, NULL );
 500         }
 501     }
 502     vlc_object_release( p_input_thread );
 503 }
 504
 505 int libvlc_video_get_track_count( libvlc_media_player_t *p_mi,
 506                                   libvlc_exception_t *p_e )
 507 {
 508     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 509     vlc_value_t val_list;
 510     int i_track_count;
 511
 512     if( !p_input_thread )
 513         return -1;
 514
 515     var_Change( p_input_thread, "video-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 516     i_track_count = val_list.p_list->i_count;
 517     var_Change( p_input_thread, "video-es", VLC_VAR_FREELIST, &val_list, NULL );
 518
 519     vlc_object_release( p_input_thread );
 520     return i_track_count;
 521 }
 522
 523 libvlc_track_description_t *
 524         libvlc_video_get_track_description( libvlc_media_player_t *p_mi,
 525                                             libvlc_exception_t *p_e )
 526 {
 527     return libvlc_get_track_description( p_mi, "video-es", p_e);
 528 }
 529
 530 int libvlc_video_get_track( libvlc_media_player_t *p_mi,
 531                             libvlc_exception_t *p_e )
 532 {
 533     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 534     vlc_value_t val_list;
 535     vlc_value_t val;
 536     int i_track = -1;
 537     int i_ret = -1;
 538     int i;
 539
 540     if( !p_input_thread )
 541         return -1;
 542
 543     i_ret = var_Get( p_input_thread, "video-es", &val );
 544     if( i_ret < 0 )
 545     {
 546         libvlc_exception_raise( p_e, "Getting Video track information failed" );
 547         vlc_object_release( p_input_thread );
 548         return i_ret;
 549     }
 550
 551     var_Change( p_input_thread, "video-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 552     for( i = 0; i < val_list.p_list->i_count; i++ )
 553     {
 554         if( val_list.p_list->p_values[i].i_int == val.i_int )
 555         {
 556             i_track = i;
 557             break;
 558         }
 559     }
 560     var_Change( p_input_thread, "video-es", VLC_VAR_FREELIST, &val_list, NULL );
 561     vlc_object_release( p_input_thread );
 562     return i_track;
 563 }
 564
 565 void libvlc_video_set_track( libvlc_media_player_t *p_mi, int i_track,
 566                              libvlc_exception_t *p_e )
 567 {
 568     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi, p_e );
 569     vlc_value_t val_list;
 570     int i_ret = -1;
 571     int i;
 572
 573     if( !p_input_thread )
 574         return;
 575
 576     var_Change( p_input_thread, "video-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 577     for( i = 0; i < val_list.p_list->i_count; i++ )
 578     {
 579         vlc_value_t val = val_list.p_list->p_values[i];
 580         if( i_track == val.i_int )
 581         {
 582             i_ret = var_Set( p_input_thread, "audio-es", val );
 583             if( i_ret < 0 )
 584                 libvlc_exception_raise( p_e, "Setting video track failed" );
 585             goto end;
 586         }
 587     }
 588     libvlc_exception_raise( p_e, "Video track out of range" );
 589
 590 end:
 591     var_Change( p_input_thread, "video-es", VLC_VAR_FREELIST, &val_list, NULL );
 592     vlc_object_release( p_input_thread );
 593 }