1 /*****************************************************************************
2 * intf.c : audio output API towards the interface modules
3 *****************************************************************************
4 * Copyright (C) 2002-2007 the VideoLAN team
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
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.
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.
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 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
35 #include <stdlib.h> /* calloc(), malloc(), free() */
39 #include "aout_internal.h"
41 #include <vlc_playlist.h>
43 static aout_instance_t *findAout (vlc_object_t *obj)
45 input_thread_t *(*pf_find_input) (vlc_object_t *);
47 pf_find_input = var_GetAddress (obj, "find-input-callback");
48 if (unlikely(pf_find_input == NULL))
51 input_thread_t *p_input = pf_find_input (obj);
55 aout_instance_t *p_aout = input_GetAout (p_input);
56 vlc_object_release (p_input);
59 #define findAout(o) findAout(VLC_OBJECT(o))
64 * The hardware volume cannot be set if the output module gets deleted, so
65 * we must take the mixer lock. The software volume cannot be set while the
66 * mixer is running, so we need the mixer lock (too).
68 * Here is a schematic of the i_volume range :
70 * |------------------------------+---------------------------------------|
73 * Between 0 and pi_soft, the volume is done in hardware by the output
74 * module. Above, the output module will change p_aout->mixer.i_multiplier
75 * (done in software). This scaling may result * in cropping errors and
76 * should be avoided as much as possible.
78 * It is legal to have *pi_soft == 0, and do everything in software.
79 * It is also legal to have *pi_soft == 1024, and completely avoid
80 * software scaling. However, some streams (esp. A/52) are encoded with
81 * a very low volume and users may complain.
91 /*****************************************************************************
92 * doVolumeChanges : handle all volume changes. Internal use only to ease
94 *****************************************************************************/
96 int doVolumeChanges( unsigned action, vlc_object_t * p_object, int i_nb_steps,
97 audio_volume_t i_volume, audio_volume_t * i_return_volume,
100 int i_result = VLC_SUCCESS;
101 int i_volume_step = 1, i_new_volume = 0;
102 bool b_var_mute = false;
103 aout_instance_t *p_aout = findAout( p_object );
105 if ( p_aout ) aout_lock_volume( p_aout );
107 b_var_mute = (bool)var_GetBool( p_object->p_libvlc, "volume-muted");
109 const bool b_unmute_condition = ( /* Also unmute on increments */
110 ( action == INCREMENT_VOLUME )
111 || /* On explicit unmute */
112 ( ( action == SET_MUTE ) && ( b_var_mute && !b_mute ) )
113 || /* On toggle from muted */
114 ( ( action == TOGGLE_MUTE ) && b_var_mute ) );
116 const bool b_mute_condition = ( !b_var_mute
118 ( ( action == SET_MUTE ) && b_mute )
120 ( action == TOGGLE_MUTE )
124 if ( b_unmute_condition )
126 /* Restore saved volume */
127 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
128 i_volume = (audio_volume_t)var_GetInteger( p_object->p_libvlc,
130 var_SetBool( p_object->p_libvlc, "volume-muted", false );
132 else if ( b_mute_condition )
134 /* We need an initial value to backup later */
135 i_volume = config_GetInt( p_object, "volume" );
138 if ( action == INCREMENT_VOLUME )
140 i_volume_step = config_GetInt( p_object->p_libvlc, "volume-step" );
142 if ( !b_unmute_condition )
143 i_volume = config_GetInt( p_object, "volume" );
145 i_new_volume = (int) i_volume + i_volume_step * i_nb_steps;
147 if ( i_new_volume > AOUT_VOLUME_MAX )
148 i_volume = AOUT_VOLUME_MAX;
149 else if ( i_new_volume < AOUT_VOLUME_MIN )
150 i_volume = AOUT_VOLUME_MIN;
152 i_volume = i_new_volume;
154 if ( i_return_volume != NULL )
155 *i_return_volume = i_volume;
158 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
159 var_SetInteger( p_object->p_libvlc, "saved-volume" , i_volume );
162 if ( b_mute_condition )
164 i_volume = AOUT_VOLUME_MIN;
165 var_SetBool( p_object->p_libvlc, "volume-muted", true );
168 /* Commit volume changes */
169 config_PutInt( p_object, "volume", i_volume );
173 aout_lock_mixer( p_aout );
174 aout_lock_input_fifos( p_aout );
175 if ( p_aout->p_mixer )
176 i_result = p_aout->output.pf_volume_set( p_aout, i_volume );
177 aout_unlock_input_fifos( p_aout );
178 aout_unlock_mixer( p_aout );
181 /* trigger callbacks */
182 var_TriggerCallback( p_object->p_libvlc, "volume-change");
185 var_SetBool( p_aout, "intf-change", true );
186 aout_unlock_volume( p_aout );
187 vlc_object_release( p_aout );
193 #undef aout_VolumeGet
194 /*****************************************************************************
195 * aout_VolumeGet : get the volume of the output device
196 *****************************************************************************/
197 int aout_VolumeGet( vlc_object_t * p_object, audio_volume_t * pi_volume )
200 aout_instance_t * p_aout = findAout( p_object );
202 if ( pi_volume == NULL ) return -1;
204 if ( p_aout == NULL )
206 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
210 aout_lock_volume( p_aout );
211 aout_lock_mixer( p_aout );
212 if ( p_aout->p_mixer )
214 i_result = p_aout->output.pf_volume_get( p_aout, pi_volume );
218 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
220 aout_unlock_mixer( p_aout );
221 aout_unlock_volume( p_aout );
223 vlc_object_release( p_aout );
227 #undef aout_VolumeSet
228 /*****************************************************************************
229 * aout_VolumeSet : set the volume of the output device
230 *****************************************************************************/
231 int aout_VolumeSet( vlc_object_t * p_object, audio_volume_t i_volume )
233 return doVolumeChanges( SET_VOLUME, p_object, 1, i_volume, NULL, true );
237 /*****************************************************************************
238 * aout_VolumeUp : raise the output volume
239 *****************************************************************************
240 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
242 *****************************************************************************/
243 int aout_VolumeUp( vlc_object_t * p_object, int i_nb_steps,
244 audio_volume_t * pi_volume )
246 return doVolumeChanges( INCREMENT_VOLUME, p_object, i_nb_steps, 0, pi_volume, true );
249 #undef aout_VolumeDown
250 /*****************************************************************************
251 * aout_VolumeDown : lower the output volume
252 *****************************************************************************
253 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
255 *****************************************************************************/
256 int aout_VolumeDown( vlc_object_t * p_object, int i_nb_steps,
257 audio_volume_t * pi_volume )
259 return aout_VolumeUp( p_object, -i_nb_steps, pi_volume );
262 #undef aout_ToggleMute
263 /*****************************************************************************
264 * aout_ToggleMute : Mute/un-mute the output volume
265 *****************************************************************************
266 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
267 * function (muted => 0).
268 *****************************************************************************/
269 int aout_ToggleMute( vlc_object_t * p_object, audio_volume_t * pi_volume )
271 return doVolumeChanges( TOGGLE_MUTE, p_object, 1, 0, pi_volume, true );
274 /*****************************************************************************
275 * aout_IsMuted : Get the output volume mute status
276 *****************************************************************************/
277 bool aout_IsMuted( vlc_object_t * p_object )
280 aout_instance_t * p_aout = findAout( p_object );
281 if ( p_aout ) aout_lock_volume( p_aout );
282 b_return_val = var_GetBool( p_object->p_libvlc, "volume-muted");
285 aout_unlock_volume( p_aout );
286 vlc_object_release( p_aout );
291 /*****************************************************************************
292 * aout_SetMute : Sets mute status
293 *****************************************************************************
294 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
295 * function (muted => 0).
296 *****************************************************************************/
297 int aout_SetMute( vlc_object_t * p_object, audio_volume_t * pi_volume,
300 return doVolumeChanges( SET_MUTE, p_object, 1, 0, pi_volume, b_mute );
304 * The next functions are not supposed to be called by the interface, but
305 * are placeholders for software-only scaling.
308 /* Meant to be called by the output plug-in's Open(). */
309 void aout_VolumeSoftInit( aout_instance_t * p_aout )
313 p_aout->output.pf_volume_get = aout_VolumeSoftGet;
314 p_aout->output.pf_volume_set = aout_VolumeSoftSet;
316 i_volume = config_GetInt( p_aout, "volume" );
317 if ( i_volume < AOUT_VOLUME_MIN )
319 i_volume = AOUT_VOLUME_DEFAULT;
321 else if ( i_volume > AOUT_VOLUME_MAX )
323 i_volume = AOUT_VOLUME_MAX;
326 aout_VolumeSoftSet( p_aout, (audio_volume_t)i_volume );
329 /* Placeholder for pf_volume_get(). */
330 int aout_VolumeSoftGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
332 *pi_volume = p_aout->output.i_volume;
337 /* Placeholder for pf_volume_set(). */
338 int aout_VolumeSoftSet( aout_instance_t * p_aout, audio_volume_t i_volume )
340 aout_MixerMultiplierSet( p_aout, (float)i_volume / AOUT_VOLUME_DEFAULT );
341 p_aout->output.i_volume = i_volume;
346 * The next functions are not supposed to be called by the interface, but
347 * are placeholders for unsupported scaling.
350 /* Meant to be called by the output plug-in's Open(). */
351 void aout_VolumeNoneInit( aout_instance_t * p_aout )
353 p_aout->output.pf_volume_get = aout_VolumeNoneGet;
354 p_aout->output.pf_volume_set = aout_VolumeNoneSet;
357 /* Placeholder for pf_volume_get(). */
358 int aout_VolumeNoneGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
360 (void)p_aout; (void)pi_volume;
364 /* Placeholder for pf_volume_set(). */
365 int aout_VolumeNoneSet( aout_instance_t * p_aout, audio_volume_t i_volume )
367 (void)p_aout; (void)i_volume;
373 * Pipelines management
376 /*****************************************************************************
377 * aout_Restart : re-open the output device and rebuild the input and output
379 *****************************************************************************
380 * This function is used whenever the parameters of the output plug-in are
381 * changed (eg. selecting S/PDIF or PCM).
382 *****************************************************************************/
383 static int aout_Restart( aout_instance_t * p_aout )
388 aout_lock_mixer( p_aout );
390 if ( p_aout->i_nb_inputs == 0 )
392 aout_unlock_mixer( p_aout );
393 msg_Err( p_aout, "no decoder thread" );
397 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
399 aout_lock_input( p_aout, p_aout->pp_inputs[i] );
400 aout_lock_input_fifos( p_aout );
401 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
402 aout_unlock_input_fifos( p_aout );
405 /* Lock all inputs. */
406 aout_lock_input_fifos( p_aout );
407 aout_MixerDelete( p_aout );
409 /* Re-open the output plug-in. */
410 aout_OutputDelete( p_aout );
412 if ( aout_OutputNew( p_aout, &p_aout->pp_inputs[0]->input ) == -1 )
414 /* Release all locks and report the error. */
415 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
417 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
419 aout_unlock_input_fifos( p_aout );
420 aout_unlock_mixer( p_aout );
424 if ( aout_MixerNew( p_aout ) == -1 )
426 aout_OutputDelete( p_aout );
427 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
429 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
431 aout_unlock_input_fifos( p_aout );
432 aout_unlock_mixer( p_aout );
436 /* Re-open all inputs. */
437 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
439 aout_input_t * p_input = p_aout->pp_inputs[i];
440 b_error |= aout_InputNew( p_aout, p_input, &p_input->request_vout );
441 p_input->b_changed = 1;
442 aout_unlock_input( p_aout, p_input );
445 aout_unlock_input_fifos( p_aout );
446 aout_unlock_mixer( p_aout );
451 /*****************************************************************************
452 * aout_FindAndRestart : find the audio output instance and restart
453 *****************************************************************************
454 * This is used for callbacks of the configuration variables, and we believe
455 * that when those are changed, it is a significant change which implies
456 * rebuilding the audio-device and audio-channels variables.
457 *****************************************************************************/
458 int aout_FindAndRestart( vlc_object_t * p_this, const char *psz_name,
459 vlc_value_t oldval, vlc_value_t newval, void *p_data )
461 aout_instance_t * p_aout = findAout( pl_Get(p_this) );
463 (void)psz_name; (void)oldval; (void)newval; (void)p_data;
464 if ( p_aout == NULL ) return VLC_SUCCESS;
466 var_Destroy( p_aout, "audio-device" );
467 var_Destroy( p_aout, "audio-channels" );
469 aout_Restart( p_aout );
470 vlc_object_release( p_aout );
475 /*****************************************************************************
476 * aout_ChannelsRestart : change the audio device or channels and restart
477 *****************************************************************************/
478 int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable,
479 vlc_value_t oldval, vlc_value_t newval,
482 aout_instance_t * p_aout = (aout_instance_t *)p_this;
483 (void)oldval; (void)newval; (void)p_data;
485 if ( !strcmp( psz_variable, "audio-device" ) )
487 /* This is supposed to be a significant change and supposes
488 * rebuilding the channel choices. */
489 var_Destroy( p_aout, "audio-channels" );
491 aout_Restart( p_aout );
495 #undef aout_EnableFilter
496 /** Enable or disable an audio filter
497 * \param p_this a vlc object
498 * \param psz_name name of the filter
499 * \param b_add are we adding or removing the filter ?
501 void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
504 aout_instance_t *p_aout = findAout( p_this );
506 if( AoutChangeFilterString( p_this, p_aout, "audio-filter", psz_name, b_add ) )
509 AoutInputsMarkToRestart( p_aout );
513 vlc_object_release( p_aout );