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"
44 * The hardware volume cannot be set if the output module gets deleted, so
45 * we must take the mixer lock. The software volume cannot be set while the
46 * mixer is running, so we need the mixer lock (too).
48 * Here is a schematic of the i_volume range :
50 * |------------------------------+---------------------------------------|
53 * Between 0 and pi_soft, the volume is done in hardware by the output
54 * module. Above, the output module will change p_aout->mixer.i_multiplier
55 * (done in software). This scaling may result * in cropping errors and
56 * should be avoided as much as possible.
58 * It is legal to have *pi_soft == 0, and do everything in software.
59 * It is also legal to have *pi_soft == 1024, and completely avoid
60 * software scaling. However, some streams (esp. A/52) are encoded with
61 * a very low volume and users may complain.
64 /*****************************************************************************
65 * aout_VolumeGet : get the volume of the output device
66 *****************************************************************************/
67 int __aout_VolumeGet( vlc_object_t * p_object, audio_volume_t * pi_volume )
70 aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT,
73 if ( pi_volume == NULL ) return -1;
77 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
81 aout_lock_mixer( p_aout );
82 if ( !p_aout->mixer.b_error )
84 i_result = p_aout->output.pf_volume_get( p_aout, pi_volume );
88 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
90 aout_unlock_mixer( p_aout );
92 vlc_object_release( p_aout );
96 /*****************************************************************************
97 * aout_VolumeSet : set the volume of the output device
98 *****************************************************************************/
99 int __aout_VolumeSet( vlc_object_t * p_object, audio_volume_t i_volume )
101 config_PutInt( p_object, "volume", i_volume );
102 var_SetBool( p_object->p_libvlc, "volume-change", true );
104 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
105 var_SetInteger( p_object->p_libvlc, "saved-volume" , i_volume );
107 aout_instance_t *p_aout = vlc_object_find( p_object,
108 VLC_OBJECT_AOUT, FIND_ANYWHERE );
109 if ( p_aout == NULL )
112 int i_result = VLC_SUCCESS;
113 aout_lock_mixer( p_aout );
115 if ( !p_aout->mixer.b_error )
116 i_result = p_aout->output.pf_volume_set( p_aout, i_volume );
118 aout_unlock_mixer( p_aout );
120 var_SetBool( p_aout, "intf-change", true );
121 vlc_object_release( p_aout );
125 /*****************************************************************************
126 * aout_VolumeInfos : get the boundary pi_soft
127 *****************************************************************************/
128 int __aout_VolumeInfos( vlc_object_t * p_object, audio_volume_t * pi_soft )
130 aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT,
134 if ( p_aout == NULL ) return 0;
136 aout_lock_mixer( p_aout );
137 if ( p_aout->mixer.b_error )
139 /* The output module is destroyed. */
144 i_result = p_aout->output.pf_volume_infos( p_aout, pi_soft );
146 aout_unlock_mixer( p_aout );
148 vlc_object_release( p_aout );
152 /*****************************************************************************
153 * aout_VolumeUp : raise the output volume
154 *****************************************************************************
155 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
157 *****************************************************************************/
158 int __aout_VolumeUp( vlc_object_t * p_object, int i_nb_steps,
159 audio_volume_t * pi_volume )
162 const int i_volume_step = config_GetInt( p_object->p_libvlc, "volume-step" );
164 int i_volume = config_GetInt( p_object, "volume" ) +
165 i_volume_step * i_nb_steps;
166 if ( i_volume > AOUT_VOLUME_MAX )
167 i_volume = AOUT_VOLUME_MAX;
168 else if ( i_volume < AOUT_VOLUME_MIN )
169 i_volume = AOUT_VOLUME_MIN;
170 if ( pi_volume != NULL )
171 *pi_volume = i_volume;
173 return __aout_VolumeSet( p_object, i_volume );
176 /*****************************************************************************
177 * aout_VolumeDown : lower the output volume
178 *****************************************************************************
179 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
181 *****************************************************************************/
182 int __aout_VolumeDown( vlc_object_t * p_object, int i_nb_steps,
183 audio_volume_t * pi_volume )
185 return __aout_VolumeUp( p_object, -i_nb_steps, pi_volume );
188 /*****************************************************************************
189 * aout_ToggleMute : Mute/un-mute the output volume
190 *****************************************************************************
191 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
192 * function (muted => 0).
193 *****************************************************************************/
194 int __aout_ToggleMute( vlc_object_t * p_object, audio_volume_t * pi_volume )
197 audio_volume_t i_volume;
199 i_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
203 i_result = aout_VolumeSet( p_object, AOUT_VOLUME_MIN );
204 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
205 var_SetInteger( p_object->p_libvlc, "saved-volume", (int)i_volume );
206 if ( pi_volume != NULL ) *pi_volume = AOUT_VOLUME_MIN;
211 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
212 i_volume = (audio_volume_t)var_GetInteger( p_object->p_libvlc,
214 i_result = aout_VolumeSet( p_object, i_volume );
215 if ( pi_volume != NULL ) *pi_volume = i_volume;
222 * The next functions are not supposed to be called by the interface, but
223 * are placeholders for software-only scaling.
226 /* Meant to be called by the output plug-in's Open(). */
227 void aout_VolumeSoftInit( aout_instance_t * p_aout )
231 p_aout->output.pf_volume_infos = aout_VolumeSoftInfos;
232 p_aout->output.pf_volume_get = aout_VolumeSoftGet;
233 p_aout->output.pf_volume_set = aout_VolumeSoftSet;
235 i_volume = config_GetInt( p_aout, "volume" );
236 if ( i_volume < AOUT_VOLUME_MIN )
238 i_volume = AOUT_VOLUME_DEFAULT;
240 else if ( i_volume > AOUT_VOLUME_MAX )
242 i_volume = AOUT_VOLUME_MAX;
245 aout_VolumeSoftSet( p_aout, (audio_volume_t)i_volume );
248 /* Placeholder for pf_volume_infos(). */
249 int aout_VolumeSoftInfos( aout_instance_t * p_aout, audio_volume_t * pi_soft )
256 /* Placeholder for pf_volume_get(). */
257 int aout_VolumeSoftGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
259 *pi_volume = p_aout->output.i_volume;
264 /* Placeholder for pf_volume_set(). */
265 int aout_VolumeSoftSet( aout_instance_t * p_aout, audio_volume_t i_volume )
267 aout_MixerMultiplierSet( p_aout, (float)i_volume / AOUT_VOLUME_DEFAULT );
268 p_aout->output.i_volume = i_volume;
273 * The next functions are not supposed to be called by the interface, but
274 * are placeholders for unsupported scaling.
277 /* Meant to be called by the output plug-in's Open(). */
278 void aout_VolumeNoneInit( aout_instance_t * p_aout )
280 p_aout->output.pf_volume_infos = aout_VolumeNoneInfos;
281 p_aout->output.pf_volume_get = aout_VolumeNoneGet;
282 p_aout->output.pf_volume_set = aout_VolumeNoneSet;
285 /* Placeholder for pf_volume_infos(). */
286 int aout_VolumeNoneInfos( aout_instance_t * p_aout, audio_volume_t * pi_soft )
288 (void)p_aout; (void)pi_soft;
292 /* Placeholder for pf_volume_get(). */
293 int aout_VolumeNoneGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
295 (void)p_aout; (void)pi_volume;
299 /* Placeholder for pf_volume_set(). */
300 int aout_VolumeNoneSet( aout_instance_t * p_aout, audio_volume_t i_volume )
302 (void)p_aout; (void)i_volume;
308 * Pipelines management
311 /*****************************************************************************
312 * aout_Restart : re-open the output device and rebuild the input and output
314 *****************************************************************************
315 * This function is used whenever the parameters of the output plug-in are
316 * changed (eg. selecting S/PDIF or PCM).
317 *****************************************************************************/
318 static int aout_Restart( aout_instance_t * p_aout )
323 aout_lock_mixer( p_aout );
325 if ( p_aout->i_nb_inputs == 0 )
327 aout_unlock_mixer( p_aout );
328 msg_Err( p_aout, "no decoder thread" );
332 /* Lock all inputs. */
333 aout_lock_input_fifos( p_aout );
335 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
337 aout_lock_input( p_aout, p_aout->pp_inputs[i] );
338 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
341 aout_MixerDelete( p_aout );
343 /* Re-open the output plug-in. */
344 aout_OutputDelete( p_aout );
346 if ( aout_OutputNew( p_aout, &p_aout->pp_inputs[0]->input ) == -1 )
348 /* Release all locks and report the error. */
349 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
351 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
353 aout_unlock_input_fifos( p_aout );
354 aout_unlock_mixer( p_aout );
358 if ( aout_MixerNew( p_aout ) == -1 )
360 aout_OutputDelete( p_aout );
361 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
363 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
365 aout_unlock_input_fifos( p_aout );
366 aout_unlock_mixer( p_aout );
370 /* Re-open all inputs. */
371 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
373 aout_input_t * p_input = p_aout->pp_inputs[i];
374 b_error |= aout_InputNew( p_aout, p_input, &p_input->request_vout );
375 p_input->b_changed = 1;
376 aout_unlock_input( p_aout, p_input );
379 aout_unlock_input_fifos( p_aout );
380 aout_unlock_mixer( p_aout );
385 /*****************************************************************************
386 * aout_FindAndRestart : find the audio output instance and restart
387 *****************************************************************************
388 * This is used for callbacks of the configuration variables, and we believe
389 * that when those are changed, it is a significant change which implies
390 * rebuilding the audio-device and audio-channels variables.
391 *****************************************************************************/
392 int aout_FindAndRestart( vlc_object_t * p_this, const char *psz_name,
393 vlc_value_t oldval, vlc_value_t newval, void *p_data )
395 aout_instance_t * p_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT,
398 (void)psz_name; (void)oldval; (void)newval; (void)p_data;
399 if ( p_aout == NULL ) return VLC_SUCCESS;
401 var_Destroy( p_aout, "audio-device" );
402 var_Destroy( p_aout, "audio-channels" );
404 aout_Restart( p_aout );
405 vlc_object_release( p_aout );
410 /*****************************************************************************
411 * aout_ChannelsRestart : change the audio device or channels and restart
412 *****************************************************************************/
413 int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable,
414 vlc_value_t oldval, vlc_value_t newval,
417 aout_instance_t * p_aout = (aout_instance_t *)p_this;
418 (void)oldval; (void)newval; (void)p_data;
420 if ( !strcmp( psz_variable, "audio-device" ) )
422 /* This is supposed to be a significant change and supposes
423 * rebuilding the channel choices. */
424 var_Destroy( p_aout, "audio-channels" );
426 aout_Restart( p_aout );
430 #undef aout_EnableFilter
431 /** Enable or disable an audio filter
432 * \param p_this a vlc object
433 * \param psz_name name of the filter
434 * \param b_add are we adding or removing the filter ?
436 void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
439 aout_instance_t *p_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT,
442 if( AoutChangeFilterString( p_this, p_aout, "audio-filter", psz_name, b_add ) )
445 AoutInputsMarkToRestart( p_aout );
449 vlc_object_release( p_aout );