1 /*****************************************************************************
2 * intf.c : audio output API towards the interface modules
3 *****************************************************************************
4 * Copyright (C) 2002-2004 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 *****************************************************************************/
31 #include <stdlib.h> /* calloc(), malloc(), free() */
34 #include "audio_output.h"
35 #include "aout_internal.h"
41 * The hardware volume cannot be set if the output module gets deleted, so
42 * we must take the mixer lock. The software volume cannot be set while the
43 * mixer is running, so we need the mixer lock (too).
45 * Here is a schematic of the i_volume range :
47 * |------------------------------+---------------------------------------|
50 * Between 0 and pi_soft, the volume is done in hardware by the output
51 * module. Above, the output module will change p_aout->mixer.i_multiplier
52 * (done in software). This scaling may result * in cropping errors and
53 * should be avoided as much as possible.
55 * It is legal to have *pi_soft == 0, and do everything in software.
56 * It is also legal to have *pi_soft == 1024, and completely avoid
57 * software scaling. However, some streams (esp. A/52) are encoded with
58 * a very low volume and users may complain.
61 /*****************************************************************************
62 * aout_VolumeGet : get the volume of the output device
63 *****************************************************************************/
64 int __aout_VolumeGet( vlc_object_t * p_object, audio_volume_t * pi_volume )
67 aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT,
70 if ( pi_volume == NULL ) return -1;
74 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
78 vlc_mutex_lock( &p_aout->mixer_lock );
79 if ( !p_aout->mixer.b_error )
81 i_result = p_aout->output.pf_volume_get( p_aout, pi_volume );
85 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
87 vlc_mutex_unlock( &p_aout->mixer_lock );
89 vlc_object_release( p_aout );
93 /*****************************************************************************
94 * aout_VolumeSet : set the volume of the output device
95 *****************************************************************************/
96 int __aout_VolumeSet( vlc_object_t * p_object, audio_volume_t i_volume )
99 aout_instance_t *p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT, FIND_ANYWHERE );
102 config_PutInt( p_object, "volume", i_volume );
104 val.b_bool = VLC_TRUE;
105 var_Set( p_object->p_libvlc, "volume-change", val );
107 if ( p_aout == NULL ) return 0;
109 vlc_mutex_lock( &p_aout->mixer_lock );
110 if ( !p_aout->mixer.b_error )
112 i_result = p_aout->output.pf_volume_set( p_aout, i_volume );
114 vlc_mutex_unlock( &p_aout->mixer_lock );
116 var_Set( p_aout, "intf-change", val );
117 vlc_object_release( p_aout );
121 /*****************************************************************************
122 * aout_VolumeInfos : get the boundary pi_soft
123 *****************************************************************************/
124 int __aout_VolumeInfos( vlc_object_t * p_object, audio_volume_t * pi_soft )
126 aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT,
130 if ( p_aout == NULL ) return 0;
132 vlc_mutex_lock( &p_aout->mixer_lock );
133 if ( p_aout->mixer.b_error )
135 /* The output module is destroyed. */
140 i_result = p_aout->output.pf_volume_infos( p_aout, pi_soft );
142 vlc_mutex_unlock( &p_aout->mixer_lock );
144 vlc_object_release( p_aout );
148 /*****************************************************************************
149 * aout_VolumeUp : raise the output volume
150 *****************************************************************************
151 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
153 *****************************************************************************/
154 int __aout_VolumeUp( vlc_object_t * p_object, int i_nb_steps,
155 audio_volume_t * pi_volume )
157 aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT,
159 int i_result = 0, i_volume = 0, i_volume_step = 0;
161 i_volume_step = config_GetInt( p_object->p_libvlc, "volume-step" );
162 i_volume = config_GetInt( p_object, "volume" );
163 i_volume += i_volume_step * i_nb_steps;
164 if ( i_volume > AOUT_VOLUME_MAX )
166 i_volume = AOUT_VOLUME_MAX;
168 config_PutInt( p_object, "volume", i_volume );
169 var_Create( p_object->p_libvlc_global, "saved-volume", VLC_VAR_INTEGER );
170 var_SetInteger( p_object->p_libvlc_global, "saved-volume" ,
171 (audio_volume_t) i_volume );
172 if ( pi_volume != NULL ) *pi_volume = (audio_volume_t) i_volume;
174 if ( p_aout == NULL ) return 0;
176 vlc_mutex_lock( &p_aout->mixer_lock );
177 if ( !p_aout->mixer.b_error )
179 i_result = p_aout->output.pf_volume_set( p_aout,
180 (audio_volume_t) i_volume );
182 vlc_mutex_unlock( &p_aout->mixer_lock );
184 vlc_object_release( p_aout );
188 /*****************************************************************************
189 * aout_VolumeDown : lower the output volume
190 *****************************************************************************
191 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
193 *****************************************************************************/
194 int __aout_VolumeDown( vlc_object_t * p_object, int i_nb_steps,
195 audio_volume_t * pi_volume )
197 aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT,
199 int i_result = 0, i_volume = 0, i_volume_step = 0;
201 i_volume_step = config_GetInt( p_object->p_libvlc, "volume-step" );
202 i_volume = config_GetInt( p_object, "volume" );
203 i_volume -= i_volume_step * i_nb_steps;
204 if ( i_volume < AOUT_VOLUME_MIN )
206 i_volume = AOUT_VOLUME_MIN;
208 config_PutInt( p_object, "volume", i_volume );
209 var_Create( p_object->p_libvlc_global, "saved-volume", VLC_VAR_INTEGER );
210 var_SetInteger( p_object->p_libvlc_global, "saved-volume", (audio_volume_t) i_volume );
211 if ( pi_volume != NULL ) *pi_volume = (audio_volume_t) i_volume;
213 if ( p_aout == NULL ) return 0;
215 vlc_mutex_lock( &p_aout->mixer_lock );
216 if ( !p_aout->mixer.b_error )
218 i_result = p_aout->output.pf_volume_set( p_aout, (audio_volume_t) i_volume );
220 vlc_mutex_unlock( &p_aout->mixer_lock );
222 vlc_object_release( p_aout );
226 /*****************************************************************************
227 * aout_VolumeMute : Mute/un-mute the output volume
228 *****************************************************************************
229 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
230 * function (muted => 0).
231 *****************************************************************************/
232 int __aout_VolumeMute( vlc_object_t * p_object, audio_volume_t * pi_volume )
235 audio_volume_t i_volume;
237 i_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
241 i_result = aout_VolumeSet( p_object, AOUT_VOLUME_MIN );
242 var_Create( p_object->p_libvlc_global, "saved-volume", VLC_VAR_INTEGER );
243 var_SetInteger( p_object->p_libvlc_global, "saved-volume", (int)i_volume );
244 if ( pi_volume != NULL ) *pi_volume = AOUT_VOLUME_MIN;
249 var_Create( p_object->p_libvlc_global, "saved-volume", VLC_VAR_INTEGER );
250 i_volume = (audio_volume_t)var_GetInteger( p_object->p_libvlc_global,
252 i_result = aout_VolumeSet( p_object, i_volume );
253 if ( pi_volume != NULL ) *pi_volume = i_volume;
260 * The next functions are not supposed to be called by the interface, but
261 * are placeholders for software-only scaling.
264 /* Meant to be called by the output plug-in's Open(). */
265 void aout_VolumeSoftInit( aout_instance_t * p_aout )
269 p_aout->output.pf_volume_infos = aout_VolumeSoftInfos;
270 p_aout->output.pf_volume_get = aout_VolumeSoftGet;
271 p_aout->output.pf_volume_set = aout_VolumeSoftSet;
273 i_volume = config_GetInt( p_aout, "volume" );
274 if ( i_volume < AOUT_VOLUME_MIN )
276 i_volume = AOUT_VOLUME_DEFAULT;
278 else if ( i_volume > AOUT_VOLUME_MAX )
280 i_volume = AOUT_VOLUME_MAX;
283 aout_VolumeSoftSet( p_aout, (audio_volume_t)i_volume );
286 /* Placeholder for pf_volume_infos(). */
287 int aout_VolumeSoftInfos( aout_instance_t * p_aout, audio_volume_t * pi_soft )
293 /* Placeholder for pf_volume_get(). */
294 int aout_VolumeSoftGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
296 *pi_volume = p_aout->output.i_volume;
301 /* Placeholder for pf_volume_set(). */
302 int aout_VolumeSoftSet( aout_instance_t * p_aout, audio_volume_t i_volume )
304 aout_MixerMultiplierSet( p_aout, (float)i_volume / AOUT_VOLUME_DEFAULT );
305 p_aout->output.i_volume = i_volume;
310 * The next functions are not supposed to be called by the interface, but
311 * are placeholders for unsupported scaling.
314 /* Meant to be called by the output plug-in's Open(). */
315 void aout_VolumeNoneInit( aout_instance_t * p_aout )
317 p_aout->output.pf_volume_infos = aout_VolumeNoneInfos;
318 p_aout->output.pf_volume_get = aout_VolumeNoneGet;
319 p_aout->output.pf_volume_set = aout_VolumeNoneSet;
322 /* Placeholder for pf_volume_infos(). */
323 int aout_VolumeNoneInfos( aout_instance_t * p_aout, audio_volume_t * pi_soft )
328 /* Placeholder for pf_volume_get(). */
329 int aout_VolumeNoneGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
334 /* Placeholder for pf_volume_set(). */
335 int aout_VolumeNoneSet( aout_instance_t * p_aout, audio_volume_t i_volume )
342 * Pipelines management
345 /*****************************************************************************
346 * aout_Restart : re-open the output device and rebuild the input and output
348 *****************************************************************************
349 * This function is used whenever the parameters of the output plug-in are
350 * changed (eg. selecting S/PDIF or PCM).
351 *****************************************************************************/
352 int aout_Restart( aout_instance_t * p_aout )
355 vlc_bool_t b_error = 0;
357 vlc_mutex_lock( &p_aout->mixer_lock );
359 if ( p_aout->i_nb_inputs == 0 )
361 vlc_mutex_unlock( &p_aout->mixer_lock );
362 msg_Err( p_aout, "no decoder thread" );
366 /* Lock all inputs. */
367 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
369 vlc_mutex_lock( &p_aout->pp_inputs[i]->lock );
370 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
373 aout_MixerDelete( p_aout );
375 /* Re-open the output plug-in. */
376 aout_OutputDelete( p_aout );
378 if ( aout_OutputNew( p_aout, &p_aout->pp_inputs[0]->input ) == -1 )
380 /* Release all locks and report the error. */
381 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
383 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
385 vlc_mutex_unlock( &p_aout->mixer_lock );
389 if ( aout_MixerNew( p_aout ) == -1 )
391 aout_OutputDelete( p_aout );
392 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
394 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
396 vlc_mutex_unlock( &p_aout->mixer_lock );
400 /* Re-open all inputs. */
401 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
403 aout_input_t * p_input = p_aout->pp_inputs[i];
405 b_error |= aout_InputNew( p_aout, p_input );
406 p_input->b_changed = 1;
407 vlc_mutex_unlock( &p_input->lock );
410 vlc_mutex_unlock( &p_aout->mixer_lock );
415 /*****************************************************************************
416 * aout_FindAndRestart : find the audio output instance and restart
417 *****************************************************************************
418 * This is used for callbacks of the configuration variables, and we believe
419 * that when those are changed, it is a significant change which implies
420 * rebuilding the audio-device and audio-channels variables.
421 *****************************************************************************/
422 int aout_FindAndRestart( vlc_object_t * p_this, const char *psz_name,
423 vlc_value_t oldval, vlc_value_t val, void *p_data )
425 aout_instance_t * p_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT,
428 if ( p_aout == NULL ) return VLC_SUCCESS;
430 if ( var_Type( p_aout, "audio-device" ) != 0 )
432 var_Destroy( p_aout, "audio-device" );
434 if ( var_Type( p_aout, "audio-channels" ) != 0 )
436 var_Destroy( p_aout, "audio-channels" );
439 aout_Restart( p_aout );
440 vlc_object_release( p_aout );
445 /*****************************************************************************
446 * aout_ChannelsRestart : change the audio device or channels and restart
447 *****************************************************************************/
448 int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable,
449 vlc_value_t old_value, vlc_value_t new_value,
452 aout_instance_t * p_aout = (aout_instance_t *)p_this;
454 if ( !strcmp( psz_variable, "audio-device" ) )
456 /* This is supposed to be a significant change and supposes
457 * rebuilding the channel choices. */
458 if ( var_Type( p_aout, "audio-channels" ) >= 0 )
460 var_Destroy( p_aout, "audio-channels" );
463 aout_Restart( p_aout );
467 /** Enable or disable an audio filter
468 * \param p_this a vlc object
469 * \param psz_name name of the filter
470 * \param b_add are we adding or removing the filter ?
472 void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
475 char *psz_parser, *psz_string;
476 aout_instance_t * p_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT,
480 psz_string = var_GetString( p_aout, "audio-filter" );
482 psz_string = config_GetPsz( p_this, "audio-filter" );
484 if( !psz_string ) psz_string = strdup("");
486 psz_parser = strstr( psz_string, psz_name );
492 psz_parser = psz_string;
493 asprintf( &psz_string, (*psz_string) ? "%s:%s" : "%s%s",
494 psz_string, psz_name );
499 vlc_object_release( p_aout );
507 memmove( psz_parser, psz_parser + strlen(psz_name) +
508 (*(psz_parser + strlen(psz_name)) == ':' ? 1 : 0 ),
509 strlen(psz_parser + strlen(psz_name)) + 1 );
511 if( *(psz_string+strlen(psz_string ) -1 ) == ':' )
513 *(psz_string+strlen(psz_string ) -1 ) = '\0';
524 config_PutPsz( p_this, "audio-filter", psz_string );
527 var_SetString( p_aout, "audio-filter", psz_string );
528 for( int i = 0; i < p_aout->i_nb_inputs; i++ )
529 p_aout->pp_inputs[i]->b_restart = VLC_TRUE;
530 vlc_object_release( p_aout );
536 * Change audio visualization
537 * -1 goes backwards, +1 goes forward
539 char *aout_VisualChange( vlc_object_t *p_this, int i_skip )
541 return strdup("foobar");