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 *****************************************************************************/
31 #include <stdlib.h> /* calloc(), malloc(), free() */
35 #include "aout_internal.h"
40 * The hardware volume cannot be set if the output module gets deleted, so
41 * we must take the mixer lock. The software volume cannot be set while the
42 * mixer is running, so we need the mixer lock (too).
44 * Here is a schematic of the i_volume range :
46 * |------------------------------+---------------------------------------|
49 * Between 0 and pi_soft, the volume is done in hardware by the output
50 * module. Above, the output module will change p_aout->mixer.i_multiplier
51 * (done in software). This scaling may result * in cropping errors and
52 * should be avoided as much as possible.
54 * It is legal to have *pi_soft == 0, and do everything in software.
55 * It is also legal to have *pi_soft == 1024, and completely avoid
56 * software scaling. However, some streams (esp. A/52) are encoded with
57 * a very low volume and users may complain.
60 /*****************************************************************************
61 * aout_VolumeGet : get the volume of the output device
62 *****************************************************************************/
63 int __aout_VolumeGet( vlc_object_t * p_object, audio_volume_t * pi_volume )
66 aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT,
69 if ( pi_volume == NULL ) return -1;
73 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
77 vlc_mutex_lock( &p_aout->mixer_lock );
78 if ( !p_aout->mixer.b_error )
80 i_result = p_aout->output.pf_volume_get( p_aout, pi_volume );
84 *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
86 vlc_mutex_unlock( &p_aout->mixer_lock );
88 vlc_object_release( p_aout );
92 /*****************************************************************************
93 * aout_VolumeSet : set the volume of the output device
94 *****************************************************************************/
95 int __aout_VolumeSet( vlc_object_t * p_object, audio_volume_t i_volume )
98 aout_instance_t *p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT, FIND_ANYWHERE );
101 config_PutInt( p_object, "volume", i_volume );
103 val.b_bool = VLC_TRUE;
104 var_Set( p_object->p_libvlc, "volume-change", val );
106 if ( p_aout == NULL ) return 0;
108 vlc_mutex_lock( &p_aout->mixer_lock );
109 if ( !p_aout->mixer.b_error )
111 i_result = p_aout->output.pf_volume_set( p_aout, i_volume );
113 vlc_mutex_unlock( &p_aout->mixer_lock );
115 var_Set( p_aout, "intf-change", val );
116 vlc_object_release( p_aout );
120 /*****************************************************************************
121 * aout_VolumeInfos : get the boundary pi_soft
122 *****************************************************************************/
123 int __aout_VolumeInfos( vlc_object_t * p_object, audio_volume_t * pi_soft )
125 aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT,
129 if ( p_aout == NULL ) return 0;
131 vlc_mutex_lock( &p_aout->mixer_lock );
132 if ( p_aout->mixer.b_error )
134 /* The output module is destroyed. */
139 i_result = p_aout->output.pf_volume_infos( p_aout, pi_soft );
141 vlc_mutex_unlock( &p_aout->mixer_lock );
143 vlc_object_release( p_aout );
147 /*****************************************************************************
148 * aout_VolumeUp : raise the output volume
149 *****************************************************************************
150 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
152 *****************************************************************************/
153 int __aout_VolumeUp( vlc_object_t * p_object, int i_nb_steps,
154 audio_volume_t * pi_volume )
156 aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT,
158 int i_result = 0, i_volume = 0, i_volume_step = 0;
160 i_volume_step = config_GetInt( p_object->p_libvlc, "volume-step" );
161 i_volume = config_GetInt( p_object, "volume" );
162 i_volume += i_volume_step * i_nb_steps;
163 if ( i_volume > AOUT_VOLUME_MAX )
165 i_volume = AOUT_VOLUME_MAX;
167 config_PutInt( p_object, "volume", i_volume );
168 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
169 var_SetInteger( p_object->p_libvlc, "saved-volume" ,
170 (audio_volume_t) i_volume );
171 if ( pi_volume != NULL ) *pi_volume = (audio_volume_t) i_volume;
173 val.b_bool = VLC_TRUE;
174 var_Set( p_object->p_libvlc, "volume-change", val );
176 if ( p_aout == NULL ) return 0;
178 vlc_mutex_lock( &p_aout->mixer_lock );
179 if ( !p_aout->mixer.b_error )
181 i_result = p_aout->output.pf_volume_set( p_aout,
182 (audio_volume_t) i_volume );
184 vlc_mutex_unlock( &p_aout->mixer_lock );
186 vlc_object_release( p_aout );
190 /*****************************************************************************
191 * aout_VolumeDown : lower the output volume
192 *****************************************************************************
193 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
195 *****************************************************************************/
196 int __aout_VolumeDown( vlc_object_t * p_object, int i_nb_steps,
197 audio_volume_t * pi_volume )
199 aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT,
201 int i_result = 0, i_volume = 0, i_volume_step = 0;
203 i_volume_step = config_GetInt( p_object->p_libvlc, "volume-step" );
204 i_volume = config_GetInt( p_object, "volume" );
205 i_volume -= i_volume_step * i_nb_steps;
206 if ( i_volume < AOUT_VOLUME_MIN )
208 i_volume = AOUT_VOLUME_MIN;
210 config_PutInt( p_object, "volume", i_volume );
211 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
212 var_SetInteger( p_object->p_libvlc, "saved-volume", (audio_volume_t) i_volume );
213 if ( pi_volume != NULL ) *pi_volume = (audio_volume_t) i_volume;
215 val.b_bool = VLC_TRUE;
216 var_Set( p_object->p_libvlc, "volume-change", val );
218 if ( p_aout == NULL ) return 0;
220 vlc_mutex_lock( &p_aout->mixer_lock );
221 if ( !p_aout->mixer.b_error )
223 i_result = p_aout->output.pf_volume_set( p_aout, (audio_volume_t) i_volume );
225 vlc_mutex_unlock( &p_aout->mixer_lock );
227 vlc_object_release( p_aout );
231 /*****************************************************************************
232 * aout_VolumeMute : Mute/un-mute the output volume
233 *****************************************************************************
234 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
235 * function (muted => 0).
236 *****************************************************************************/
237 int __aout_VolumeMute( vlc_object_t * p_object, audio_volume_t * pi_volume )
240 audio_volume_t i_volume;
242 i_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
246 i_result = aout_VolumeSet( p_object, AOUT_VOLUME_MIN );
247 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
248 var_SetInteger( p_object->p_libvlc, "saved-volume", (int)i_volume );
249 if ( pi_volume != NULL ) *pi_volume = AOUT_VOLUME_MIN;
254 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
255 i_volume = (audio_volume_t)var_GetInteger( p_object->p_libvlc,
257 i_result = aout_VolumeSet( p_object, i_volume );
258 if ( pi_volume != NULL ) *pi_volume = i_volume;
265 * The next functions are not supposed to be called by the interface, but
266 * are placeholders for software-only scaling.
269 /* Meant to be called by the output plug-in's Open(). */
270 void aout_VolumeSoftInit( aout_instance_t * p_aout )
274 p_aout->output.pf_volume_infos = aout_VolumeSoftInfos;
275 p_aout->output.pf_volume_get = aout_VolumeSoftGet;
276 p_aout->output.pf_volume_set = aout_VolumeSoftSet;
278 i_volume = config_GetInt( p_aout, "volume" );
279 if ( i_volume < AOUT_VOLUME_MIN )
281 i_volume = AOUT_VOLUME_DEFAULT;
283 else if ( i_volume > AOUT_VOLUME_MAX )
285 i_volume = AOUT_VOLUME_MAX;
288 aout_VolumeSoftSet( p_aout, (audio_volume_t)i_volume );
291 /* Placeholder for pf_volume_infos(). */
292 int aout_VolumeSoftInfos( aout_instance_t * p_aout, audio_volume_t * pi_soft )
299 /* Placeholder for pf_volume_get(). */
300 int aout_VolumeSoftGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
302 *pi_volume = p_aout->output.i_volume;
307 /* Placeholder for pf_volume_set(). */
308 int aout_VolumeSoftSet( aout_instance_t * p_aout, audio_volume_t i_volume )
310 aout_MixerMultiplierSet( p_aout, (float)i_volume / AOUT_VOLUME_DEFAULT );
311 p_aout->output.i_volume = i_volume;
316 * The next functions are not supposed to be called by the interface, but
317 * are placeholders for unsupported scaling.
320 /* Meant to be called by the output plug-in's Open(). */
321 void aout_VolumeNoneInit( aout_instance_t * p_aout )
323 p_aout->output.pf_volume_infos = aout_VolumeNoneInfos;
324 p_aout->output.pf_volume_get = aout_VolumeNoneGet;
325 p_aout->output.pf_volume_set = aout_VolumeNoneSet;
328 /* Placeholder for pf_volume_infos(). */
329 int aout_VolumeNoneInfos( aout_instance_t * p_aout, audio_volume_t * pi_soft )
331 (void)p_aout; (void)pi_soft;
335 /* Placeholder for pf_volume_get(). */
336 int aout_VolumeNoneGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
338 (void)p_aout; (void)pi_volume;
342 /* Placeholder for pf_volume_set(). */
343 int aout_VolumeNoneSet( aout_instance_t * p_aout, audio_volume_t i_volume )
345 (void)p_aout; (void)i_volume;
351 * Pipelines management
354 /*****************************************************************************
355 * aout_Restart : re-open the output device and rebuild the input and output
357 *****************************************************************************
358 * This function is used whenever the parameters of the output plug-in are
359 * changed (eg. selecting S/PDIF or PCM).
360 *****************************************************************************/
361 static int aout_Restart( aout_instance_t * p_aout )
364 vlc_bool_t b_error = 0;
366 vlc_mutex_lock( &p_aout->mixer_lock );
368 if ( p_aout->i_nb_inputs == 0 )
370 vlc_mutex_unlock( &p_aout->mixer_lock );
371 msg_Err( p_aout, "no decoder thread" );
375 /* Lock all inputs. */
376 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
378 vlc_mutex_lock( &p_aout->pp_inputs[i]->lock );
379 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
382 aout_MixerDelete( p_aout );
384 /* Re-open the output plug-in. */
385 aout_OutputDelete( p_aout );
387 if ( aout_OutputNew( p_aout, &p_aout->pp_inputs[0]->input ) == -1 )
389 /* Release all locks and report the error. */
390 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
392 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
394 vlc_mutex_unlock( &p_aout->mixer_lock );
398 if ( aout_MixerNew( p_aout ) == -1 )
400 aout_OutputDelete( p_aout );
401 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
403 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
405 vlc_mutex_unlock( &p_aout->mixer_lock );
409 /* Re-open all inputs. */
410 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
412 aout_input_t * p_input = p_aout->pp_inputs[i];
414 b_error |= aout_InputNew( p_aout, p_input );
415 p_input->b_changed = 1;
416 vlc_mutex_unlock( &p_input->lock );
419 vlc_mutex_unlock( &p_aout->mixer_lock );
424 /*****************************************************************************
425 * aout_FindAndRestart : find the audio output instance and restart
426 *****************************************************************************
427 * This is used for callbacks of the configuration variables, and we believe
428 * that when those are changed, it is a significant change which implies
429 * rebuilding the audio-device and audio-channels variables.
430 *****************************************************************************/
431 int aout_FindAndRestart( vlc_object_t * p_this, const char *psz_name,
432 vlc_value_t oldval, vlc_value_t newval, void *p_data )
434 aout_instance_t * p_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT,
437 (void)psz_name; (void)oldval; (void)newval; (void)p_data;
438 if ( p_aout == NULL ) return VLC_SUCCESS;
440 if ( var_Type( p_aout, "audio-device" ) != 0 )
442 var_Destroy( p_aout, "audio-device" );
444 if ( var_Type( p_aout, "audio-channels" ) != 0 )
446 var_Destroy( p_aout, "audio-channels" );
449 aout_Restart( p_aout );
450 vlc_object_release( p_aout );
455 /*****************************************************************************
456 * aout_ChannelsRestart : change the audio device or channels and restart
457 *****************************************************************************/
458 int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable,
459 vlc_value_t oldval, vlc_value_t newval,
462 aout_instance_t * p_aout = (aout_instance_t *)p_this;
463 (void)oldval; (void)newval; (void)p_data;
465 if ( !strcmp( psz_variable, "audio-device" ) )
467 /* This is supposed to be a significant change and supposes
468 * rebuilding the channel choices. */
469 if ( var_Type( p_aout, "audio-channels" ) >= 0 )
471 var_Destroy( p_aout, "audio-channels" );
474 aout_Restart( p_aout );
478 /** Enable or disable an audio filter
479 * \param p_this a vlc object
480 * \param psz_name name of the filter
481 * \param b_add are we adding or removing the filter ?
483 void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
486 char *psz_parser, *psz_string;
487 aout_instance_t * p_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT,
491 psz_string = var_GetNonEmptyString( p_aout, "audio-filter" );
493 psz_string = config_GetPsz( p_this, "audio-filter" );
495 if( !psz_string ) psz_string = strdup("");
497 psz_parser = strstr( psz_string, psz_name );
503 psz_parser = psz_string;
504 asprintf( &psz_string, (*psz_string) ? "%s:%s" : "%s%s",
505 psz_string, psz_name );
510 vlc_object_release( p_aout );
518 memmove( psz_parser, psz_parser + strlen(psz_name) +
519 (*(psz_parser + strlen(psz_name)) == ':' ? 1 : 0 ),
520 strlen(psz_parser + strlen(psz_name)) + 1 );
522 if( *(psz_string+strlen(psz_string ) -1 ) == ':' )
524 *(psz_string+strlen(psz_string ) -1 ) = '\0';
535 config_PutPsz( p_this, "audio-filter", psz_string );
538 var_SetString( p_aout, "audio-filter", psz_string );
539 for( int i = 0; i < p_aout->i_nb_inputs; i++ )
540 p_aout->pp_inputs[i]->b_restart = VLC_TRUE;
541 vlc_object_release( p_aout );
547 * Change audio visualization
548 * -1 goes backwards, +1 goes forward
550 char *aout_VisualChange( vlc_object_t *p_this, int i_skip )
552 (void)p_this; (void)i_skip;
553 msg_Err( p_this, "FIXME: %s (%s %d) isn't implemented.", __func__,
554 __FILE__, __LINE__ );
555 return strdup("foobar");