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 playlist_t *pl = pl_Hold (obj->p_libvlc);
49 input_thread_t *p_input = playlist_CurrentInput (pl);
50 pl_Release (obj->p_libvlc);
54 aout_instance_t *p_aout = input_GetAout (p_input);
55 vlc_object_release (p_input);
62 * The hardware volume cannot be set if the output module gets deleted, so
63 * we must take the mixer lock. The software volume cannot be set while the
64 * mixer is running, so we need the mixer lock (too).
66 * Here is a schematic of the i_volume range :
68 * |------------------------------+---------------------------------------|
71 * Between 0 and pi_soft, the volume is done in hardware by the output
72 * module. Above, the output module will change p_aout->mixer.i_multiplier
73 * (done in software). This scaling may result * in cropping errors and
74 * should be avoided as much as possible.
76 * It is legal to have *pi_soft == 0, and do everything in software.
77 * It is also legal to have *pi_soft == 1024, and completely avoid
78 * software scaling. However, some streams (esp. A/52) are encoded with
79 * a very low volume and users may complain.
88 /*****************************************************************************
89 * doVolumeChanges : handle all volume changes. Internal use only to ease
91 *****************************************************************************/
92 int doVolumeChanges( unsigned action, vlc_object_t * p_object, int i_nb_steps,
93 audio_volume_t i_volume, audio_volume_t * i_return_volume,
96 int i_result = VLC_SUCCESS;
97 int i_volume_step = 1, i_new_volume = 0;
98 bool b_var_mute = false;
99 aout_instance_t *p_aout = findAout( p_object );
101 if ( p_aout ) aout_lock_volume( p_aout );
103 b_var_mute = (bool)var_GetBool( p_object->p_libvlc, "volume-muted");
105 const bool b_unmute_condition = ( /* Also unmute on increments */
106 ( action == INCREMENT_VOLUME )
107 || /* On explicit unmute */
108 ( ( action == SET_MUTE ) && ( b_var_mute && !b_mute ) )
109 || /* On toggle from muted */
110 ( ( action == TOGGLE_MUTE ) && b_var_mute ) );
112 const bool b_mute_condition = ( !b_var_mute
114 ( ( action == SET_MUTE ) && b_mute )
116 ( action == TOGGLE_MUTE )
120 if ( b_unmute_condition )
122 /* Restore saved volume */
123 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
124 i_volume = (audio_volume_t)var_GetInteger( p_object->p_libvlc,
126 var_SetBool( p_object->p_libvlc, "volume-muted", false );
128 else if ( b_mute_condition )
130 /* We need an initial value to backup later */
131 i_volume = config_GetInt( p_object, "volume" );
134 if ( action == INCREMENT_VOLUME )
136 i_volume_step = config_GetInt( p_object->p_libvlc, "volume-step" );
138 if ( !b_unmute_condition )
139 i_volume = config_GetInt( p_object, "volume" );
141 i_new_volume = (int) i_volume + i_volume_step * i_nb_steps;
143 if ( i_new_volume > AOUT_VOLUME_MAX )
144 i_volume = AOUT_VOLUME_MAX;
145 else if ( i_new_volume < AOUT_VOLUME_MIN )
146 i_volume = AOUT_VOLUME_MIN;
148 i_volume = i_new_volume;
150 if ( i_return_volume != NULL )
151 *i_return_volume = i_volume;
154 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
155 var_SetInteger( p_object->p_libvlc, "saved-volume" , i_volume );
158 if ( b_mute_condition )
160 i_volume = AOUT_VOLUME_MIN;
161 var_SetBool( p_object->p_libvlc, "volume-muted", true );
164 /* Commit volume changes */
165 config_PutInt( p_object, "volume", i_volume );
169 aout_lock_mixer( p_aout );
170 aout_lock_input_fifos( p_aout );
171 if ( p_aout->p_mixer )
172 i_result = p_aout->output.pf_volume_set( p_aout, i_volume );
173 aout_unlock_input_fifos( p_aout );
174 aout_unlock_mixer( p_aout );
177 /* trigger callbacks */
178 var_TriggerCallback( p_object->p_libvlc, "volume-change");
179 if ( p_aout ) var_SetBool( p_aout, "intf-change", true );
183 aout_unlock_volume( p_aout );
184 vlc_object_release( p_aout );
190 /*****************************************************************************
191 * aout_VolumeGet : get the volume of the output device
192 *****************************************************************************/
193 int __aout_VolumeGet( vlc_object_t * p_object, audio_volume_t * pi_volume )
196 aout_instance_t * p_aout = findAout( p_object );
198 if ( pi_volume == NULL ) return -1;
200 if ( p_aout == NULL )
202 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
206 aout_lock_volume( p_aout );
207 aout_lock_mixer( p_aout );
208 if ( p_aout->p_mixer )
210 i_result = p_aout->output.pf_volume_get( p_aout, pi_volume );
214 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
216 aout_unlock_mixer( p_aout );
217 aout_unlock_volume( p_aout );
219 vlc_object_release( p_aout );
223 /*****************************************************************************
224 * aout_VolumeSet : set the volume of the output device
225 *****************************************************************************/
226 int __aout_VolumeSet( vlc_object_t * p_object, audio_volume_t i_volume )
228 return doVolumeChanges( SET_VOLUME, p_object, 1, i_volume, NULL, true );
231 /*****************************************************************************
232 * aout_VolumeUp : raise the output volume
233 *****************************************************************************
234 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
236 *****************************************************************************/
237 int __aout_VolumeUp( vlc_object_t * p_object, int i_nb_steps,
238 audio_volume_t * pi_volume )
240 return doVolumeChanges( INCREMENT_VOLUME, p_object, i_nb_steps, 0, pi_volume, true );
243 /*****************************************************************************
244 * aout_VolumeDown : lower the output volume
245 *****************************************************************************
246 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
248 *****************************************************************************/
249 int __aout_VolumeDown( vlc_object_t * p_object, int i_nb_steps,
250 audio_volume_t * pi_volume )
252 return __aout_VolumeUp( p_object, -i_nb_steps, pi_volume );
255 /*****************************************************************************
256 * aout_ToggleMute : Mute/un-mute the output volume
257 *****************************************************************************
258 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
259 * function (muted => 0).
260 *****************************************************************************/
261 int __aout_ToggleMute( vlc_object_t * p_object, audio_volume_t * pi_volume )
263 return doVolumeChanges( TOGGLE_MUTE, p_object, 1, 0, pi_volume, true );
266 /*****************************************************************************
267 * aout_IsMuted : Get the output volume mute status
268 *****************************************************************************/
269 bool aout_IsMuted( vlc_object_t * p_object )
272 aout_instance_t * p_aout = findAout( p_object );
273 if ( p_aout ) aout_lock_volume( p_aout );
274 b_return_val = var_GetBool( p_object->p_libvlc, "volume-muted");
277 aout_unlock_volume( p_aout );
278 vlc_object_release( p_aout );
283 /*****************************************************************************
284 * aout_SetMute : Sets mute status
285 *****************************************************************************
286 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
287 * function (muted => 0).
288 *****************************************************************************/
289 int aout_SetMute( vlc_object_t * p_object, audio_volume_t * pi_volume,
292 return doVolumeChanges( SET_MUTE, p_object, 1, 0, pi_volume, b_mute );
296 * The next functions are not supposed to be called by the interface, but
297 * are placeholders for software-only scaling.
300 /* Meant to be called by the output plug-in's Open(). */
301 void aout_VolumeSoftInit( aout_instance_t * p_aout )
305 p_aout->output.pf_volume_get = aout_VolumeSoftGet;
306 p_aout->output.pf_volume_set = aout_VolumeSoftSet;
308 i_volume = config_GetInt( p_aout, "volume" );
309 if ( i_volume < AOUT_VOLUME_MIN )
311 i_volume = AOUT_VOLUME_DEFAULT;
313 else if ( i_volume > AOUT_VOLUME_MAX )
315 i_volume = AOUT_VOLUME_MAX;
318 aout_VolumeSoftSet( p_aout, (audio_volume_t)i_volume );
321 /* Placeholder for pf_volume_get(). */
322 int aout_VolumeSoftGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
324 *pi_volume = p_aout->output.i_volume;
329 /* Placeholder for pf_volume_set(). */
330 int aout_VolumeSoftSet( aout_instance_t * p_aout, audio_volume_t i_volume )
332 aout_MixerMultiplierSet( p_aout, (float)i_volume / AOUT_VOLUME_DEFAULT );
333 p_aout->output.i_volume = i_volume;
338 * The next functions are not supposed to be called by the interface, but
339 * are placeholders for unsupported scaling.
342 /* Meant to be called by the output plug-in's Open(). */
343 void aout_VolumeNoneInit( aout_instance_t * p_aout )
345 p_aout->output.pf_volume_get = aout_VolumeNoneGet;
346 p_aout->output.pf_volume_set = aout_VolumeNoneSet;
349 /* Placeholder for pf_volume_get(). */
350 int aout_VolumeNoneGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
352 (void)p_aout; (void)pi_volume;
356 /* Placeholder for pf_volume_set(). */
357 int aout_VolumeNoneSet( aout_instance_t * p_aout, audio_volume_t i_volume )
359 (void)p_aout; (void)i_volume;
365 * Pipelines management
368 /*****************************************************************************
369 * aout_Restart : re-open the output device and rebuild the input and output
371 *****************************************************************************
372 * This function is used whenever the parameters of the output plug-in are
373 * changed (eg. selecting S/PDIF or PCM).
374 *****************************************************************************/
375 static int aout_Restart( aout_instance_t * p_aout )
380 aout_lock_mixer( p_aout );
382 if ( p_aout->i_nb_inputs == 0 )
384 aout_unlock_mixer( p_aout );
385 msg_Err( p_aout, "no decoder thread" );
389 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
391 aout_lock_input( p_aout, p_aout->pp_inputs[i] );
392 aout_lock_input_fifos( p_aout );
393 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
394 aout_unlock_input_fifos( p_aout );
397 /* Lock all inputs. */
398 aout_lock_input_fifos( p_aout );
399 aout_MixerDelete( p_aout );
401 /* Re-open the output plug-in. */
402 aout_OutputDelete( p_aout );
404 if ( aout_OutputNew( p_aout, &p_aout->pp_inputs[0]->input ) == -1 )
406 /* Release all locks and report the error. */
407 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
409 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
411 aout_unlock_input_fifos( p_aout );
412 aout_unlock_mixer( p_aout );
416 if ( aout_MixerNew( p_aout ) == -1 )
418 aout_OutputDelete( p_aout );
419 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
421 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
423 aout_unlock_input_fifos( p_aout );
424 aout_unlock_mixer( p_aout );
428 /* Re-open all inputs. */
429 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
431 aout_input_t * p_input = p_aout->pp_inputs[i];
432 b_error |= aout_InputNew( p_aout, p_input, &p_input->request_vout );
433 p_input->b_changed = 1;
434 aout_unlock_input( p_aout, p_input );
437 aout_unlock_input_fifos( p_aout );
438 aout_unlock_mixer( p_aout );
443 /*****************************************************************************
444 * aout_FindAndRestart : find the audio output instance and restart
445 *****************************************************************************
446 * This is used for callbacks of the configuration variables, and we believe
447 * that when those are changed, it is a significant change which implies
448 * rebuilding the audio-device and audio-channels variables.
449 *****************************************************************************/
450 int aout_FindAndRestart( vlc_object_t * p_this, const char *psz_name,
451 vlc_value_t oldval, vlc_value_t newval, void *p_data )
453 aout_instance_t * p_aout = findAout( p_this );
455 (void)psz_name; (void)oldval; (void)newval; (void)p_data;
456 if ( p_aout == NULL ) return VLC_SUCCESS;
458 var_Destroy( p_aout, "audio-device" );
459 var_Destroy( p_aout, "audio-channels" );
461 aout_Restart( p_aout );
462 vlc_object_release( p_aout );
467 /*****************************************************************************
468 * aout_ChannelsRestart : change the audio device or channels and restart
469 *****************************************************************************/
470 int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable,
471 vlc_value_t oldval, vlc_value_t newval,
474 aout_instance_t * p_aout = (aout_instance_t *)p_this;
475 (void)oldval; (void)newval; (void)p_data;
477 if ( !strcmp( psz_variable, "audio-device" ) )
479 /* This is supposed to be a significant change and supposes
480 * rebuilding the channel choices. */
481 var_Destroy( p_aout, "audio-channels" );
483 aout_Restart( p_aout );
487 #undef aout_EnableFilter
488 /** Enable or disable an audio filter
489 * \param p_this a vlc object
490 * \param psz_name name of the filter
491 * \param b_add are we adding or removing the filter ?
493 void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
496 aout_instance_t *p_aout = findAout( p_this );
498 if( AoutChangeFilterString( p_this, p_aout, "audio-filter", psz_name, b_add ) )
501 AoutInputsMarkToRestart( p_aout );
505 vlc_object_release( p_aout );