lib/audio.c

   1 /*****************************************************************************
   2  * libvlc_audio.c: New libvlc audio control API
   3  *****************************************************************************
   4  * Copyright (C) 2006 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Filippo Carone <filippo@carone.org>
   8  *          Jean-Paul Saman <jpsaman _at_ m2x _dot_ nl>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software Foundation,
  22  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #ifdef HAVE_CONFIG_H
  26 # include "config.h"
  27 #endif
  28
  29 #include <assert.h>
  30 #include <math.h>
  31
  32 #include <vlc/libvlc.h>
  33 #include <vlc/libvlc_renderer_discoverer.h>
  34 #include <vlc/libvlc_media.h>
  35 #include <vlc/libvlc_media_player.h>
  36
  37 #include <vlc_common.h>
  38 #include <vlc_input.h>
  39 #include <vlc_aout.h>
  40 #include <vlc_modules.h>
  41
  42 #include "libvlc_internal.h"
  43 #include "media_player_internal.h"
  44
  45 /*
  46  * Remember to release the returned audio_output_t since it is locked at
  47  * the end of this function.
  48  */
  49 static audio_output_t *GetAOut( libvlc_media_player_t *mp )
  50 {
  51     assert( mp != NULL );
  52
  53     audio_output_t *p_aout = input_resource_HoldAout( mp->input.p_resource );
  54     if( p_aout == NULL )
  55         libvlc_printerr( "No active audio output" );
  56     return p_aout;
  57 }
  58
  59 /*****************************************
  60  * Get the list of available audio outputs
  61  *****************************************/
  62 libvlc_audio_output_t *
  63         libvlc_audio_output_list_get( libvlc_instance_t *p_instance )
  64 {
  65     size_t count;
  66     module_t **module_list = module_list_get( &count );
  67     libvlc_audio_output_t *list = NULL;
  68
  69     for (size_t i = 0; i < count; i++)
  70     {
  71         module_t *module = module_list[i];
  72
  73         if( !module_provides( module, "audio output" ) )
  74             continue;
  75
  76         libvlc_audio_output_t *item = malloc( sizeof( *item ) );
  77         if( unlikely(item == NULL) )
  78         {
  79     error:
  80             libvlc_printerr( "Not enough memory" );
  81             libvlc_audio_output_list_release( list );
  82             list = NULL;
  83             break;
  84         }
  85
  86         item->psz_name = strdup( module_get_object( module ) );
  87         item->psz_description = strdup( module_get_name( module, true ) );
  88         if( unlikely(item->psz_name == NULL || item->psz_description == NULL) )
  89         {
  90             free( item->psz_name );
  91             free( item->psz_description );
  92             free( item );
  93             goto error;
  94         }
  95         item->p_next = list;
  96         list = item;
  97     }
  98     module_list_free( module_list );
  99
 100     VLC_UNUSED( p_instance );
 101     return list;
 102 }
 103
 104 /********************************************
 105  * Free the list of available audio outputs
 106  ***********************************************/
 107 void libvlc_audio_output_list_release( libvlc_audio_output_t *list )
 108 {
 109     while( list != NULL )
 110     {
 111         libvlc_audio_output_t *next = list->p_next;
 112
 113         free( list->psz_name );
 114         free( list->psz_description );
 115         free( list );
 116         list = next;
 117     }
 118 }
 119
 120
 121 /***********************
 122  * Set the audio output.
 123  ***********************/
 124 int libvlc_audio_output_set( libvlc_media_player_t *mp, const char *psz_name )
 125 {
 126     char *value;
 127
 128     if( !module_exists( psz_name )
 129      || asprintf( &value, "%s,none", psz_name ) == -1 )
 130         return -1;
 131     var_SetString( mp, "aout", value );
 132     free( value );
 133
 134     /* Forget the existing audio output */
 135     input_resource_ResetAout(mp->input.p_resource);
 136
 137     /* Create a new audio output */
 138     audio_output_t *aout = input_resource_GetAout(mp->input.p_resource);
 139     if( aout != NULL )
 140         input_resource_PutAout(mp->input.p_resource, aout);
 141
 142     return 0;
 143 }
 144
 145 libvlc_audio_output_device_t *
 146 libvlc_audio_output_device_enum( libvlc_media_player_t *mp )
 147 {
 148     audio_output_t *aout = GetAOut( mp );
 149     if( aout == NULL )
 150         return NULL;
 151
 152     libvlc_audio_output_device_t *list, **pp = &list;
 153     char **values, **texts;
 154
 155     int n = aout_DevicesList( aout, &values, &texts );
 156     vlc_object_release( aout );
 157     if( n < 0 )
 158         goto err;
 159
 160     for (int i = 0; i < n; i++)
 161     {
 162         libvlc_audio_output_device_t *item = malloc( sizeof(*item) );
 163         if( unlikely(item == NULL) )
 164         {
 165             free( texts[i] );
 166             free( values[i] );
 167             continue;
 168         }
 169
 170         *pp = item;
 171         pp = &item->p_next;
 172         item->psz_device = values[i];
 173         item->psz_description = texts[i];
 174     }
 175
 176     free( texts );
 177     free( values );
 178 err:
 179     *pp = NULL;
 180     return list;
 181 }
 182
 183 libvlc_audio_output_device_t *
 184 libvlc_audio_output_device_list_get( libvlc_instance_t *p_instance,
 185                                      const char *aout )
 186 {
 187     char varname[32];
 188     if( (size_t)snprintf( varname, sizeof(varname), "%s-audio-device", aout )
 189                                                            >= sizeof(varname) )
 190         return NULL;
 191
 192     if( config_GetType(varname) != VLC_VAR_STRING )
 193         return NULL;
 194
 195     libvlc_audio_output_device_t *list = NULL, **pp = &list;
 196     char **values, **texts;
 197     ssize_t count = config_GetPszChoices( varname, &values, &texts );
 198     for( ssize_t i = 0; i < count; i++ )
 199     {
 200         libvlc_audio_output_device_t *item = malloc( sizeof(*item) );
 201         if( unlikely(item == NULL) )
 202             break;
 203
 204         *pp = item;
 205         pp = &item->p_next;
 206         item->psz_device = values[i];
 207         item->psz_description = texts[i];
 208     }
 209
 210     *pp = NULL;
 211     free( texts );
 212     free( values );
 213     (void) p_instance;
 214     return list;
 215 }
 216
 217 void libvlc_audio_output_device_list_release( libvlc_audio_output_device_t *l )
 218 {
 219     while( l != NULL )
 220     {
 221         libvlc_audio_output_device_t *next = l->p_next;
 222
 223         free( l->psz_description );
 224         free( l->psz_device );
 225         free( l );
 226         l = next;
 227     }
 228 }
 229
 230 /*****************************
 231  * Set device for using
 232  *****************************/
 233 void libvlc_audio_output_device_set( libvlc_media_player_t *mp,
 234                                      const char *module, const char *devid )
 235 {
 236     if( devid == NULL )
 237         return;
 238
 239     if( module != NULL )
 240     {
 241         char *cfg_name;
 242
 243         if( asprintf( &cfg_name, "%s-audio-device", module ) == -1 )
 244             return;
 245
 246         if( !var_Type( mp, cfg_name ) )
 247             /* Don't recreate the same variable over and over and over... */
 248             var_Create( mp, cfg_name, VLC_VAR_STRING );
 249         var_SetString( mp, cfg_name, devid );
 250         free( cfg_name );
 251         return;
 252     }
 253
 254     audio_output_t *aout = GetAOut( mp );
 255     if( aout == NULL )
 256         return;
 257
 258     aout_DeviceSet( aout, devid );
 259     vlc_object_release( aout );
 260 }
 261
 262 char *libvlc_audio_output_device_get( libvlc_media_player_t *mp )
 263 {
 264     audio_output_t *aout = GetAOut( mp );
 265     if( aout == NULL )
 266         return NULL;
 267
 268     char *devid = aout_DeviceGet( aout );
 269
 270     vlc_object_release( aout );
 271
 272     return devid;
 273 }
 274
 275 void libvlc_audio_toggle_mute( libvlc_media_player_t *mp )
 276 {
 277     int mute = libvlc_audio_get_mute( mp );
 278     if( mute != -1 )
 279         libvlc_audio_set_mute( mp, !mute );
 280 }
 281
 282 int libvlc_audio_get_mute( libvlc_media_player_t *mp )
 283 {
 284     int mute = -1;
 285
 286     audio_output_t *aout = GetAOut( mp );
 287     if( aout != NULL )
 288     {
 289         mute = aout_MuteGet( aout );
 290         vlc_object_release( aout );
 291     }
 292     return mute;
 293 }
 294
 295 void libvlc_audio_set_mute( libvlc_media_player_t *mp, int mute )
 296 {
 297     audio_output_t *aout = GetAOut( mp );
 298     if( aout != NULL )
 299     {
 300         mute = aout_MuteSet( aout, mute );
 301         vlc_object_release( aout );
 302     }
 303 }
 304
 305 int libvlc_audio_get_volume( libvlc_media_player_t *mp )
 306 {
 307     int volume = -1;
 308
 309     audio_output_t *aout = GetAOut( mp );
 310     if( aout != NULL )
 311     {
 312         float vol = aout_VolumeGet( aout );
 313         vlc_object_release( aout );
 314         volume = lroundf( vol * 100.f );
 315     }
 316     return volume;
 317 }
 318
 319 int libvlc_audio_set_volume( libvlc_media_player_t *mp, int volume )
 320 {
 321     float vol = volume / 100.f;
 322     if (!isgreaterequal(vol, 0.f))
 323     {
 324         libvlc_printerr( "Volume out of range" );
 325         return -1;
 326     }
 327
 328     int ret = -1;
 329     audio_output_t *aout = GetAOut( mp );
 330     if( aout != NULL )
 331     {
 332         ret = aout_VolumeSet( aout, vol );
 333         vlc_object_release( aout );
 334     }
 335     return ret;
 336 }
 337
 338 /*****************************************************************************
 339  * libvlc_audio_get_track_count : Get the number of available audio tracks
 340  *****************************************************************************/
 341 int libvlc_audio_get_track_count( libvlc_media_player_t *p_mi )
 342 {
 343     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi );
 344     int i_track_count;
 345
 346     if( !p_input_thread )
 347         return -1;
 348
 349     i_track_count = var_CountChoices( p_input_thread, "audio-es" );
 350
 351     vlc_object_release( p_input_thread );
 352     return i_track_count;
 353 }
 354
 355 /*****************************************************************************
 356  * libvlc_audio_get_track_description : Get the description of available audio tracks
 357  *****************************************************************************/
 358 libvlc_track_description_t *
 359         libvlc_audio_get_track_description( libvlc_media_player_t *p_mi )
 360 {
 361     return libvlc_get_track_description( p_mi, "audio-es" );
 362 }
 363
 364 /*****************************************************************************
 365  * libvlc_audio_get_track : Get the current audio track
 366  *****************************************************************************/
 367 int libvlc_audio_get_track( libvlc_media_player_t *p_mi )
 368 {
 369     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi );
 370     if( !p_input_thread )
 371         return -1;
 372
 373     int id = var_GetInteger( p_input_thread, "audio-es" );
 374     vlc_object_release( p_input_thread );
 375     return id;
 376 }
 377
 378 /*****************************************************************************
 379  * libvlc_audio_set_track : Set the current audio track
 380  *****************************************************************************/
 381 int libvlc_audio_set_track( libvlc_media_player_t *p_mi, int i_track )
 382 {
 383     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi );
 384     vlc_value_t *val_list;
 385     size_t count;
 386     int i_ret = -1;
 387
 388     if( !p_input_thread )
 389         return -1;
 390
 391     var_Change( p_input_thread, "audio-es", VLC_VAR_GETCHOICES,
 392                 &count, &val_list, (char ***)NULL );
 393     for( size_t i = 0; i < count; i++ )
 394     {
 395         if( i_track == val_list[i].i_int )
 396         {
 397             if( var_SetInteger( p_input_thread, "audio-es", i_track ) < 0 )
 398                 break;
 399             i_ret = 0;
 400             goto end;
 401         }
 402     }
 403     libvlc_printerr( "Track identifier not found" );
 404 end:
 405     free( val_list );
 406     vlc_object_release( p_input_thread );
 407     return i_ret;
 408 }
 409
 410 /*****************************************************************************
 411  * libvlc_audio_get_channel : Get the current audio channel
 412  *****************************************************************************/
 413 int libvlc_audio_get_channel( libvlc_media_player_t *mp )
 414 {
 415     audio_output_t *p_aout = GetAOut( mp );
 416     if( !p_aout )
 417         return 0;
 418
 419     int val = var_GetInteger( p_aout, "stereo-mode" );
 420     vlc_object_release( p_aout );
 421     return val;
 422 }
 423
 424 /*****************************************************************************
 425  * libvlc_audio_set_channel : Set the current audio channel
 426  *****************************************************************************/
 427 int libvlc_audio_set_channel( libvlc_media_player_t *mp, int channel )
 428 {
 429     audio_output_t *p_aout = GetAOut( mp );
 430     int ret = 0;
 431
 432     if( !p_aout )
 433         return -1;
 434
 435     if( var_SetInteger( p_aout, "stereo-mode", channel ) < 0 )
 436     {
 437         libvlc_printerr( "Audio channel out of range" );
 438         ret = -1;
 439     }
 440     vlc_object_release( p_aout );
 441     return ret;
 442 }
 443
 444 /*****************************************************************************
 445  * libvlc_audio_get_delay : Get the current audio delay
 446  *****************************************************************************/
 447 int64_t libvlc_audio_get_delay( libvlc_media_player_t *p_mi )
 448 {
 449     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
 450     int64_t val = 0;
 451     if( p_input_thread != NULL )
 452     {
 453       val = var_GetInteger( p_input_thread, "audio-delay" );
 454       vlc_object_release( p_input_thread );
 455     }
 456     return val;
 457 }
 458
 459 /*****************************************************************************
 460  * libvlc_audio_set_delay : Set the current audio delay
 461  *****************************************************************************/
 462 int libvlc_audio_set_delay( libvlc_media_player_t *p_mi, int64_t i_delay )
 463 {
 464     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
 465     int ret = 0;
 466     if( p_input_thread != NULL )
 467     {
 468       var_SetInteger( p_input_thread, "audio-delay", i_delay );
 469       vlc_object_release( p_input_thread );
 470     }
 471     else
 472     {
 473       ret = -1;
 474     }
 475     return ret;
 476 }
 477
 478 /*****************************************************************************
 479  * libvlc_audio_equalizer_get_preset_count : Get the number of equalizer presets
 480  *****************************************************************************/
 481 unsigned libvlc_audio_equalizer_get_preset_count( void )
 482 {
 483     return NB_PRESETS;
 484 }
 485
 486 /*****************************************************************************
 487  * libvlc_audio_equalizer_get_preset_name : Get the name for a preset
 488  *****************************************************************************/
 489 const char *libvlc_audio_equalizer_get_preset_name( unsigned u_index )
 490 {
 491     if ( u_index >= NB_PRESETS )
 492         return NULL;
 493
 494     return preset_list_text[ u_index ];
 495 }
 496
 497 /*****************************************************************************
 498  * libvlc_audio_equalizer_get_band_count : Get the number of equalizer frequency bands
 499  *****************************************************************************/
 500 unsigned libvlc_audio_equalizer_get_band_count( void )
 501 {
 502     return EQZ_BANDS_MAX;
 503 }
 504
 505 /*****************************************************************************
 506  * libvlc_audio_equalizer_get_band_frequency : Get the frequency for a band
 507  *****************************************************************************/
 508 float libvlc_audio_equalizer_get_band_frequency( unsigned u_index )
 509 {
 510     if ( u_index >= EQZ_BANDS_MAX )
 511         return -1.f;
 512
 513     return f_iso_frequency_table_10b[ u_index ];
 514 }
 515
 516 /*****************************************************************************
 517  * libvlc_audio_equalizer_new : Create a new audio equalizer with zeroed values
 518  *****************************************************************************/
 519 libvlc_equalizer_t *libvlc_audio_equalizer_new( void )
 520 {
 521     libvlc_equalizer_t *p_equalizer;
 522     p_equalizer = malloc( sizeof( *p_equalizer ) );
 523     if ( unlikely( p_equalizer == NULL ) )
 524         return NULL;
 525
 526     p_equalizer->f_preamp = 0.f;
 527     for ( unsigned i = 0; i < EQZ_BANDS_MAX; i++ )
 528         p_equalizer->f_amp[ i ] = 0.f;
 529
 530     return p_equalizer;
 531 }
 532
 533 /*****************************************************************************
 534  * libvlc_audio_equalizer_new_from_preset : Create a new audio equalizer based on a preset
 535  *****************************************************************************/
 536 libvlc_equalizer_t *libvlc_audio_equalizer_new_from_preset( unsigned u_index )
 537 {
 538     libvlc_equalizer_t *p_equalizer;
 539
 540     if ( u_index >= NB_PRESETS )
 541         return NULL;
 542
 543     p_equalizer = malloc( sizeof( *p_equalizer ) );
 544     if ( unlikely( p_equalizer == NULL ) )
 545         return NULL;
 546
 547     p_equalizer->f_preamp = eqz_preset_10b[ u_index ].f_preamp;
 548
 549     for ( unsigned i = 0; i < EQZ_BANDS_MAX; i++ )
 550         p_equalizer->f_amp[ i ] = eqz_preset_10b[ u_index ].f_amp[ i ];
 551
 552     return p_equalizer;
 553 }
 554
 555 /*****************************************************************************
 556  * libvlc_audio_equalizer_release : Release a previously created equalizer
 557  *****************************************************************************/
 558 void libvlc_audio_equalizer_release( libvlc_equalizer_t *p_equalizer )
 559 {
 560     free( p_equalizer );
 561 }
 562
 563 /*****************************************************************************
 564  * libvlc_audio_equalizer_set_preamp : Set the preamp value for an equalizer
 565  *****************************************************************************/
 566 int libvlc_audio_equalizer_set_preamp( libvlc_equalizer_t *p_equalizer, float f_preamp )
 567 {
 568     if( isnan(f_preamp) )
 569         return -1;
 570     if( f_preamp < -20.f )
 571         f_preamp = -20.f;
 572     else if( f_preamp > 20.f )
 573         f_preamp = 20.f;
 574
 575     p_equalizer->f_preamp = f_preamp;
 576     return 0;
 577 }
 578
 579 /*****************************************************************************
 580  * libvlc_audio_equalizer_get_preamp : Get the preamp value for an equalizer
 581  *****************************************************************************/
 582 float libvlc_audio_equalizer_get_preamp( libvlc_equalizer_t *p_equalizer )
 583 {
 584     return p_equalizer->f_preamp;
 585 }
 586
 587 /*****************************************************************************
 588  * libvlc_audio_equalizer_set_amp_at_index : Set the amplification value for an equalizer band
 589  *****************************************************************************/
 590 int libvlc_audio_equalizer_set_amp_at_index( libvlc_equalizer_t *p_equalizer, float f_amp, unsigned u_band )
 591 {
 592     if( u_band >= EQZ_BANDS_MAX || isnan(f_amp) )
 593         return -1;
 594
 595
 596     if( f_amp < -20.f )
 597         f_amp = -20.f;
 598     else if( f_amp > 20.f )
 599         f_amp = 20.f;
 600
 601     p_equalizer->f_amp[ u_band ] = f_amp;
 602     return 0;
 603 }
 604
 605 /*****************************************************************************
 606  * libvlc_audio_equalizer_get_amp_at_index : Get the amplification value for an equalizer band
 607  *****************************************************************************/
 608 float libvlc_audio_equalizer_get_amp_at_index( libvlc_equalizer_t *p_equalizer, unsigned u_band )
 609 {
 610     if ( u_band >= EQZ_BANDS_MAX )
 611         return nanf("");
 612
 613     return p_equalizer->f_amp[ u_band ];
 614 }