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_media.h>
  34 #include <vlc/libvlc_media_player.h>
  35
  36 #include <vlc_common.h>
  37 #include <vlc_input.h>
  38 #include <vlc_aout.h>
  39 #include <vlc_modules.h>
  40
  41 #include "libvlc_internal.h"
  42 #include "media_player_internal.h"
  43
  44 /*
  45  * Remember to release the returned audio_output_t since it is locked at
  46  * the end of this function.
  47  */
  48 static audio_output_t *GetAOut( libvlc_media_player_t *mp )
  49 {
  50     assert( mp != NULL );
  51
  52     audio_output_t *p_aout = input_resource_HoldAout( mp->input.p_resource );
  53     if( p_aout == NULL )
  54         libvlc_printerr( "No active audio output" );
  55     return p_aout;
  56 }
  57
  58 /*****************************************
  59  * Get the list of available audio outputs
  60  *****************************************/
  61 libvlc_audio_output_t *
  62         libvlc_audio_output_list_get( libvlc_instance_t *p_instance )
  63 {
  64     size_t count;
  65     module_t **module_list = module_list_get( &count );
  66     libvlc_audio_output_t *list = NULL;
  67
  68     for (size_t i = 0; i < count; i++)
  69     {
  70         module_t *module = module_list[i];
  71
  72         if( !module_provides( module, "audio output" ) )
  73             continue;
  74
  75         libvlc_audio_output_t *item = malloc( sizeof( *item ) );
  76         if( unlikely(item == NULL) )
  77         {
  78     error:
  79             libvlc_printerr( "Not enough memory" );
  80             libvlc_audio_output_list_release( list );
  81             list = NULL;
  82             break;
  83         }
  84
  85         item->psz_name = strdup( module_get_object( module ) );
  86         item->psz_description = strdup( module_get_name( module, true ) );
  87         if( unlikely(item->psz_name == NULL || item->psz_description == NULL) )
  88         {
  89             free( item );
  90             goto error;
  91         }
  92         item->p_next = list;
  93         list = item;
  94     }
  95     module_list_free( module_list );
  96
  97     VLC_UNUSED( p_instance );
  98     return list;
  99 }
 100
 101 /********************************************
 102  * Free the list of available audio outputs
 103  ***********************************************/
 104 void libvlc_audio_output_list_release( libvlc_audio_output_t *list )
 105 {
 106     while( list != NULL )
 107     {
 108         libvlc_audio_output_t *next = list->p_next;
 109
 110         free( list->psz_name );
 111         free( list->psz_description );
 112         free( list );
 113         list = next;
 114     }
 115 }
 116
 117
 118 /***********************
 119  * Set the audio output.
 120  ***********************/
 121 int libvlc_audio_output_set( libvlc_media_player_t *mp, const char *psz_name )
 122 {
 123     char *value;
 124
 125     if( !module_exists( psz_name )
 126      || asprintf( &value, "%s,none", psz_name ) == -1 )
 127         return -1;
 128     var_SetString( mp, "aout", value );
 129     free( value );
 130     return 0;
 131 }
 132
 133 libvlc_audio_output_device_t *
 134 libvlc_audio_output_device_list_get( libvlc_instance_t *p_instance,
 135                                      const char *aout )
 136 {
 137     char varname[32];
 138     if( (size_t)snprintf( varname, sizeof(varname), "%s-output-device", aout )
 139                                                            >= sizeof(varname) )
 140         return NULL;
 141
 142     libvlc_audio_output_device_t *list = NULL, **pp = &list;
 143     char **values, **texts;
 144     ssize_t count = config_GetPszChoices( VLC_OBJECT(p_instance->p_libvlc_int),
 145                                           varname, &values, &texts );
 146     for( ssize_t i = 0; i < count; i++ )
 147     {
 148         libvlc_audio_output_device_t *item = malloc( sizeof(*item) );
 149         if( unlikely(item == NULL) )
 150             break;
 151
 152         *pp = item;
 153         pp = &item->p_next;
 154         item->psz_device = values[i];
 155         item->psz_description = texts[i];
 156     }
 157
 158     *pp = NULL;
 159     free( texts );
 160     free( values );
 161     (void) p_instance;
 162     return list;
 163 }
 164
 165 void libvlc_audio_output_device_list_release( libvlc_audio_output_device_t *l )
 166 {
 167     while( l != NULL )
 168     {
 169         libvlc_audio_output_device_t *next = l->p_next;
 170
 171         free( l->psz_description );
 172         free( l->psz_device );
 173         free( l );
 174         l = next;
 175     }
 176 }
 177
 178 int libvlc_audio_output_device_count( libvlc_instance_t *p_instance,
 179                                       const char *psz_audio_output )
 180 {
 181     (void) p_instance; (void) psz_audio_output;
 182     return 0;
 183 }
 184
 185 char *libvlc_audio_output_device_longname( libvlc_instance_t *p_instance,
 186                                            const char *psz_audio_output,
 187                                            int i_device )
 188 {
 189     (void) p_instance; (void) psz_audio_output; (void) i_device;
 190     return NULL;
 191 }
 192
 193 char *libvlc_audio_output_device_id( libvlc_instance_t *p_instance,
 194                                      const char *psz_audio_output,
 195                                      int i_device )
 196 {
 197     (void) p_instance; (void) psz_audio_output; (void) i_device;
 198     return NULL;
 199 }
 200
 201 /*****************************
 202  * Set device for using
 203  *****************************/
 204 void libvlc_audio_output_device_set( libvlc_media_player_t *mp,
 205                                      const char *psz_audio_output,
 206                                      const char *psz_device_id )
 207 {
 208     char *psz_config_name;
 209     if( !psz_audio_output || !psz_device_id )
 210         return;
 211     if( asprintf( &psz_config_name, "%s-audio-device", psz_audio_output ) == -1 )
 212         return;
 213     if( !var_Type( mp, psz_config_name ) )
 214         /* Don't recreate the same variable over and over and over... */
 215         var_Create( mp, psz_config_name, VLC_VAR_STRING );
 216     var_SetString( mp, psz_config_name, psz_device_id );
 217     free( psz_config_name );
 218 }
 219
 220 int libvlc_audio_output_get_device_type( libvlc_media_player_t *mp )
 221 {
 222     (void) mp;
 223     return libvlc_AudioOutputDevice_Error;
 224 }
 225
 226 void libvlc_audio_output_set_device_type( libvlc_media_player_t *mp,
 227                                           int device_type )
 228 {
 229     (void) mp; (void) device_type;
 230 }
 231
 232 void libvlc_audio_toggle_mute( libvlc_media_player_t *mp )
 233 {
 234     int mute = libvlc_audio_get_mute( mp );
 235     if( mute != -1 )
 236         libvlc_audio_set_mute( mp, !mute );
 237 }
 238
 239 int libvlc_audio_get_mute( libvlc_media_player_t *mp )
 240 {
 241     int mute = -1;
 242
 243     audio_output_t *aout = GetAOut( mp );
 244     if( aout != NULL )
 245     {
 246         mute = aout_MuteGet( aout );
 247         vlc_object_release( aout );
 248     }
 249     return mute;
 250 }
 251
 252 void libvlc_audio_set_mute( libvlc_media_player_t *mp, int mute )
 253 {
 254     audio_output_t *aout = GetAOut( mp );
 255     if( aout != NULL )
 256     {
 257         mute = aout_MuteSet( aout, mute );
 258         vlc_object_release( aout );
 259     }
 260 }
 261
 262 int libvlc_audio_get_volume( libvlc_media_player_t *mp )
 263 {
 264     int volume = -1;
 265
 266     audio_output_t *aout = GetAOut( mp );
 267     if( aout != NULL )
 268     {
 269         float vol = aout_VolumeGet( aout );
 270         vlc_object_release( aout );
 271         volume = lroundf( vol * 100.f );
 272     }
 273     return volume;
 274 }
 275
 276 int libvlc_audio_set_volume( libvlc_media_player_t *mp, int volume )
 277 {
 278     float vol = volume / 100.f;
 279     if (vol < 0.f)
 280     {
 281         libvlc_printerr( "Volume out of range" );
 282         return -1;
 283     }
 284
 285     int ret = -1;
 286     audio_output_t *aout = GetAOut( mp );
 287     if( aout != NULL )
 288     {
 289         ret = aout_VolumeSet( aout, vol );
 290         vlc_object_release( aout );
 291     }
 292     return ret;
 293 }
 294
 295 /*****************************************************************************
 296  * libvlc_audio_get_track_count : Get the number of available audio tracks
 297  *****************************************************************************/
 298 int libvlc_audio_get_track_count( libvlc_media_player_t *p_mi )
 299 {
 300     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi );
 301     int i_track_count;
 302
 303     if( !p_input_thread )
 304         return -1;
 305
 306     i_track_count = var_CountChoices( p_input_thread, "audio-es" );
 307
 308     vlc_object_release( p_input_thread );
 309     return i_track_count;
 310 }
 311
 312 /*****************************************************************************
 313  * libvlc_audio_get_track_description : Get the description of available audio tracks
 314  *****************************************************************************/
 315 libvlc_track_description_t *
 316         libvlc_audio_get_track_description( libvlc_media_player_t *p_mi )
 317 {
 318     return libvlc_get_track_description( p_mi, "audio-es" );
 319 }
 320
 321 /*****************************************************************************
 322  * libvlc_audio_get_track : Get the current audio track
 323  *****************************************************************************/
 324 int libvlc_audio_get_track( libvlc_media_player_t *p_mi )
 325 {
 326     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi );
 327     if( !p_input_thread )
 328         return -1;
 329
 330     int id = var_GetInteger( p_input_thread, "audio-es" );
 331     vlc_object_release( p_input_thread );
 332     return id;
 333 }
 334
 335 /*****************************************************************************
 336  * libvlc_audio_set_track : Set the current audio track
 337  *****************************************************************************/
 338 int libvlc_audio_set_track( libvlc_media_player_t *p_mi, int i_track )
 339 {
 340     input_thread_t *p_input_thread = libvlc_get_input_thread( p_mi );
 341     vlc_value_t val_list;
 342     int i_ret = -1;
 343
 344     if( !p_input_thread )
 345         return -1;
 346
 347     var_Change( p_input_thread, "audio-es", VLC_VAR_GETCHOICES, &val_list, NULL );
 348     for( int i = 0; i < val_list.p_list->i_count; i++ )
 349     {
 350         if( i_track == val_list.p_list->p_values[i].i_int )
 351         {
 352             if( var_SetInteger( p_input_thread, "audio-es", i_track ) < 0 )
 353                 break;
 354             i_ret = 0;
 355             goto end;
 356         }
 357     }
 358     libvlc_printerr( "Track identifier not found" );
 359 end:
 360     var_FreeList( &val_list, NULL );
 361     vlc_object_release( p_input_thread );
 362     return i_ret;
 363 }
 364
 365 /*****************************************************************************
 366  * libvlc_audio_get_channel : Get the current audio channel
 367  *****************************************************************************/
 368 int libvlc_audio_get_channel( libvlc_media_player_t *mp )
 369 {
 370     audio_output_t *p_aout = GetAOut( mp );
 371     if( !p_aout )
 372         return 0;
 373
 374     int val = var_GetInteger( p_aout, "stereo-mode" );
 375     vlc_object_release( p_aout );
 376     return val;
 377 }
 378
 379 /*****************************************************************************
 380  * libvlc_audio_set_channel : Set the current audio channel
 381  *****************************************************************************/
 382 int libvlc_audio_set_channel( libvlc_media_player_t *mp, int channel )
 383 {
 384     audio_output_t *p_aout = GetAOut( mp );
 385     int ret = 0;
 386
 387     if( !p_aout )
 388         return -1;
 389
 390     if( var_SetInteger( p_aout, "stereo-mode", channel ) < 0 )
 391     {
 392         libvlc_printerr( "Audio channel out of range" );
 393         ret = -1;
 394     }
 395     vlc_object_release( p_aout );
 396     return ret;
 397 }
 398
 399 /*****************************************************************************
 400  * libvlc_audio_get_delay : Get the current audio delay
 401  *****************************************************************************/
 402 int64_t libvlc_audio_get_delay( libvlc_media_player_t *p_mi )
 403 {
 404     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
 405     int64_t val = 0;
 406     if( p_input_thread != NULL )
 407     {
 408       val = var_GetTime( p_input_thread, "audio-delay" );
 409       vlc_object_release( p_input_thread );
 410     }
 411     return val;
 412 }
 413
 414 /*****************************************************************************
 415  * libvlc_audio_set_delay : Set the current audio delay
 416  *****************************************************************************/
 417 int libvlc_audio_set_delay( libvlc_media_player_t *p_mi, int64_t i_delay )
 418 {
 419     input_thread_t *p_input_thread = libvlc_get_input_thread ( p_mi );
 420     int ret = 0;
 421     if( p_input_thread != NULL )
 422     {
 423       var_SetTime( p_input_thread, "audio-delay", i_delay );
 424       vlc_object_release( p_input_thread );
 425     }
 426     else
 427     {
 428       ret = -1;
 429     }
 430     return ret;
 431 }