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 *p_input = playlist_CurrentInput (pl_Get (obj));
49 aout_instance_t *p_aout = input_GetAout (p_input);
50 vlc_object_release (p_input);
57 * The hardware volume cannot be set if the output module gets deleted, so
58 * we must take the mixer lock. The software volume cannot be set while the
59 * mixer is running, so we need the mixer lock (too).
61 * Here is a schematic of the i_volume range :
63 * |------------------------------+---------------------------------------|
66 * Between 0 and pi_soft, the volume is done in hardware by the output
67 * module. Above, the output module will change p_aout->mixer.i_multiplier
68 * (done in software). This scaling may result * in cropping errors and
69 * should be avoided as much as possible.
71 * It is legal to have *pi_soft == 0, and do everything in software.
72 * It is also legal to have *pi_soft == 1024, and completely avoid
73 * software scaling. However, some streams (esp. A/52) are encoded with
74 * a very low volume and users may complain.
83 /*****************************************************************************
84 * doVolumeChanges : handle all volume changes. Internal use only to ease
86 *****************************************************************************/
87 int doVolumeChanges( unsigned action, vlc_object_t * p_object, int i_nb_steps,
88 audio_volume_t i_volume, audio_volume_t * i_return_volume,
91 int i_result = VLC_SUCCESS;
92 int i_volume_step = 1, i_new_volume = 0;
93 bool b_var_mute = false;
94 aout_instance_t *p_aout = findAout( p_object );
96 if ( p_aout ) aout_lock_volume( p_aout );
98 b_var_mute = (bool)var_GetBool( p_object->p_libvlc, "volume-muted");
100 const bool b_unmute_condition = ( /* Also unmute on increments */
101 ( action == INCREMENT_VOLUME )
102 || /* On explicit unmute */
103 ( ( action == SET_MUTE ) && ( b_var_mute && !b_mute ) )
104 || /* On toggle from muted */
105 ( ( action == TOGGLE_MUTE ) && b_var_mute ) );
107 const bool b_mute_condition = ( !b_var_mute
109 ( ( action == SET_MUTE ) && b_mute )
111 ( action == TOGGLE_MUTE )
115 if ( b_unmute_condition )
117 /* Restore saved volume */
118 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
119 i_volume = (audio_volume_t)var_GetInteger( p_object->p_libvlc,
121 var_SetBool( p_object->p_libvlc, "volume-muted", false );
123 else if ( b_mute_condition )
125 /* We need an initial value to backup later */
126 i_volume = config_GetInt( p_object, "volume" );
129 if ( action == INCREMENT_VOLUME )
131 i_volume_step = config_GetInt( p_object->p_libvlc, "volume-step" );
133 if ( !b_unmute_condition )
134 i_volume = config_GetInt( p_object, "volume" );
136 i_new_volume = (int) i_volume + i_volume_step * i_nb_steps;
138 if ( i_new_volume > AOUT_VOLUME_MAX )
139 i_volume = AOUT_VOLUME_MAX;
140 else if ( i_new_volume < AOUT_VOLUME_MIN )
141 i_volume = AOUT_VOLUME_MIN;
143 i_volume = i_new_volume;
145 if ( i_return_volume != NULL )
146 *i_return_volume = i_volume;
149 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
150 var_SetInteger( p_object->p_libvlc, "saved-volume" , i_volume );
153 if ( b_mute_condition )
155 i_volume = AOUT_VOLUME_MIN;
156 var_SetBool( p_object->p_libvlc, "volume-muted", true );
159 /* Commit volume changes */
160 config_PutInt( p_object, "volume", i_volume );
164 aout_lock_mixer( p_aout );
165 aout_lock_input_fifos( p_aout );
166 if ( p_aout->p_mixer )
167 i_result = p_aout->output.pf_volume_set( p_aout, i_volume );
168 aout_unlock_input_fifos( p_aout );
169 aout_unlock_mixer( p_aout );
172 /* trigger callbacks */
173 var_TriggerCallback( p_object->p_libvlc, "volume-change");
176 var_SetBool( p_aout, "intf-change", true );
177 aout_unlock_volume( p_aout );
178 vlc_object_release( p_aout );
184 #undef aout_VolumeGet
185 /*****************************************************************************
186 * aout_VolumeGet : get the volume of the output device
187 *****************************************************************************/
188 int aout_VolumeGet( vlc_object_t * p_object, audio_volume_t * pi_volume )
191 aout_instance_t * p_aout = findAout( p_object );
193 if ( pi_volume == NULL ) return -1;
195 if ( p_aout == NULL )
197 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
201 aout_lock_volume( p_aout );
202 aout_lock_mixer( p_aout );
203 if ( p_aout->p_mixer )
205 i_result = p_aout->output.pf_volume_get( p_aout, pi_volume );
209 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
211 aout_unlock_mixer( p_aout );
212 aout_unlock_volume( p_aout );
214 vlc_object_release( p_aout );
218 #undef aout_VolumeSet
219 /*****************************************************************************
220 * aout_VolumeSet : set the volume of the output device
221 *****************************************************************************/
222 int aout_VolumeSet( vlc_object_t * p_object, audio_volume_t i_volume )
224 return doVolumeChanges( SET_VOLUME, p_object, 1, i_volume, NULL, true );
228 /*****************************************************************************
229 * aout_VolumeUp : raise the output volume
230 *****************************************************************************
231 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
233 *****************************************************************************/
234 int aout_VolumeUp( vlc_object_t * p_object, int i_nb_steps,
235 audio_volume_t * pi_volume )
237 return doVolumeChanges( INCREMENT_VOLUME, p_object, i_nb_steps, 0, pi_volume, true );
240 #undef aout_VolumeDown
241 /*****************************************************************************
242 * aout_VolumeDown : lower the output volume
243 *****************************************************************************
244 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
246 *****************************************************************************/
247 int aout_VolumeDown( vlc_object_t * p_object, int i_nb_steps,
248 audio_volume_t * pi_volume )
250 return aout_VolumeUp( p_object, -i_nb_steps, pi_volume );
253 #undef aout_ToggleMute
254 /*****************************************************************************
255 * aout_ToggleMute : Mute/un-mute the output volume
256 *****************************************************************************
257 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
258 * function (muted => 0).
259 *****************************************************************************/
260 int aout_ToggleMute( vlc_object_t * p_object, audio_volume_t * pi_volume )
262 return doVolumeChanges( TOGGLE_MUTE, p_object, 1, 0, pi_volume, true );
265 /*****************************************************************************
266 * aout_IsMuted : Get the output volume mute status
267 *****************************************************************************/
268 bool aout_IsMuted( vlc_object_t * p_object )
271 aout_instance_t * p_aout = findAout( p_object );
272 if ( p_aout ) aout_lock_volume( p_aout );
273 b_return_val = var_GetBool( p_object->p_libvlc, "volume-muted");
276 aout_unlock_volume( p_aout );
277 vlc_object_release( p_aout );
282 /*****************************************************************************
283 * aout_SetMute : Sets mute status
284 *****************************************************************************
285 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
286 * function (muted => 0).
287 *****************************************************************************/
288 int aout_SetMute( vlc_object_t * p_object, audio_volume_t * pi_volume,
291 return doVolumeChanges( SET_MUTE, p_object, 1, 0, pi_volume, b_mute );
295 * The next functions are not supposed to be called by the interface, but
296 * are placeholders for software-only scaling.
299 /* Meant to be called by the output plug-in's Open(). */
300 void aout_VolumeSoftInit( aout_instance_t * p_aout )
304 p_aout->output.pf_volume_get = aout_VolumeSoftGet;
305 p_aout->output.pf_volume_set = aout_VolumeSoftSet;
307 i_volume = config_GetInt( p_aout, "volume" );
308 if ( i_volume < AOUT_VOLUME_MIN )
310 i_volume = AOUT_VOLUME_DEFAULT;
312 else if ( i_volume > AOUT_VOLUME_MAX )
314 i_volume = AOUT_VOLUME_MAX;
317 aout_VolumeSoftSet( p_aout, (audio_volume_t)i_volume );
320 /* Placeholder for pf_volume_get(). */
321 int aout_VolumeSoftGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
323 *pi_volume = p_aout->output.i_volume;
328 /* Placeholder for pf_volume_set(). */
329 int aout_VolumeSoftSet( aout_instance_t * p_aout, audio_volume_t i_volume )
331 aout_MixerMultiplierSet( p_aout, (float)i_volume / AOUT_VOLUME_DEFAULT );
332 p_aout->output.i_volume = i_volume;
337 * The next functions are not supposed to be called by the interface, but
338 * are placeholders for unsupported scaling.
341 /* Meant to be called by the output plug-in's Open(). */
342 void aout_VolumeNoneInit( aout_instance_t * p_aout )
344 p_aout->output.pf_volume_get = aout_VolumeNoneGet;
345 p_aout->output.pf_volume_set = aout_VolumeNoneSet;
348 /* Placeholder for pf_volume_get(). */
349 int aout_VolumeNoneGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
351 (void)p_aout; (void)pi_volume;
355 /* Placeholder for pf_volume_set(). */
356 int aout_VolumeNoneSet( aout_instance_t * p_aout, audio_volume_t i_volume )
358 (void)p_aout; (void)i_volume;
364 * Pipelines management
367 /*****************************************************************************
368 * aout_Restart : re-open the output device and rebuild the input and output
370 *****************************************************************************
371 * This function is used whenever the parameters of the output plug-in are
372 * changed (eg. selecting S/PDIF or PCM).
373 *****************************************************************************/
374 static int aout_Restart( aout_instance_t * p_aout )
379 aout_lock_mixer( p_aout );
381 if ( p_aout->i_nb_inputs == 0 )
383 aout_unlock_mixer( p_aout );
384 msg_Err( p_aout, "no decoder thread" );
388 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
390 aout_lock_input( p_aout, p_aout->pp_inputs[i] );
391 aout_lock_input_fifos( p_aout );
392 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
393 aout_unlock_input_fifos( p_aout );
396 /* Lock all inputs. */
397 aout_lock_input_fifos( p_aout );
398 aout_MixerDelete( p_aout );
400 /* Re-open the output plug-in. */
401 aout_OutputDelete( p_aout );
403 if ( aout_OutputNew( p_aout, &p_aout->pp_inputs[0]->input ) == -1 )
405 /* Release all locks and report the error. */
406 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
408 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
410 aout_unlock_input_fifos( p_aout );
411 aout_unlock_mixer( p_aout );
415 if ( aout_MixerNew( p_aout ) == -1 )
417 aout_OutputDelete( p_aout );
418 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
420 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
422 aout_unlock_input_fifos( p_aout );
423 aout_unlock_mixer( p_aout );
427 /* Re-open all inputs. */
428 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
430 aout_input_t * p_input = p_aout->pp_inputs[i];
431 b_error |= aout_InputNew( p_aout, p_input, &p_input->request_vout );
432 p_input->b_changed = 1;
433 aout_unlock_input( p_aout, p_input );
436 aout_unlock_input_fifos( p_aout );
437 aout_unlock_mixer( p_aout );
442 /*****************************************************************************
443 * aout_FindAndRestart : find the audio output instance and restart
444 *****************************************************************************
445 * This is used for callbacks of the configuration variables, and we believe
446 * that when those are changed, it is a significant change which implies
447 * rebuilding the audio-device and audio-channels variables.
448 *****************************************************************************/
449 int aout_FindAndRestart( vlc_object_t * p_this, const char *psz_name,
450 vlc_value_t oldval, vlc_value_t newval, void *p_data )
452 aout_instance_t * p_aout = findAout( p_this );
454 (void)psz_name; (void)oldval; (void)newval; (void)p_data;
455 if ( p_aout == NULL ) return VLC_SUCCESS;
457 var_Destroy( p_aout, "audio-device" );
458 var_Destroy( p_aout, "audio-channels" );
460 aout_Restart( p_aout );
461 vlc_object_release( p_aout );
466 /*****************************************************************************
467 * aout_ChannelsRestart : change the audio device or channels and restart
468 *****************************************************************************/
469 int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable,
470 vlc_value_t oldval, vlc_value_t newval,
473 aout_instance_t * p_aout = (aout_instance_t *)p_this;
474 (void)oldval; (void)newval; (void)p_data;
476 if ( !strcmp( psz_variable, "audio-device" ) )
478 /* This is supposed to be a significant change and supposes
479 * rebuilding the channel choices. */
480 var_Destroy( p_aout, "audio-channels" );
482 aout_Restart( p_aout );
486 #undef aout_EnableFilter
487 /** Enable or disable an audio filter
488 * \param p_this a vlc object
489 * \param psz_name name of the filter
490 * \param b_add are we adding or removing the filter ?
492 void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
495 aout_instance_t *p_aout = findAout( p_this );
497 if( AoutChangeFilterString( p_this, p_aout, "audio-filter", psz_name, b_add ) )
500 AoutInputsMarkToRestart( p_aout );
504 vlc_object_release( p_aout );