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->p_mixer )
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;
114 aout_lock_mixer( p_aout );
115 aout_lock_input_fifos( p_aout );
116 if ( p_aout->p_mixer )
117 i_result = p_aout->output.pf_volume_set( p_aout, i_volume );
118 aout_unlock_input_fifos( p_aout );
119 aout_unlock_mixer( p_aout );
121 var_SetBool( p_aout, "intf-change", true );
122 vlc_object_release( p_aout );
126 /*****************************************************************************
127 * aout_VolumeUp : raise the output volume
128 *****************************************************************************
129 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
131 *****************************************************************************/
132 int __aout_VolumeUp( vlc_object_t * p_object, int i_nb_steps,
133 audio_volume_t * pi_volume )
135 aout_SetMute( p_object, pi_volume, false );
136 const int i_volume_step = config_GetInt( p_object->p_libvlc, "volume-step" );
138 int i_volume = config_GetInt( p_object, "volume" ) +
139 i_volume_step * i_nb_steps;
140 if ( i_volume > AOUT_VOLUME_MAX )
141 i_volume = AOUT_VOLUME_MAX;
142 else if ( i_volume < AOUT_VOLUME_MIN )
143 i_volume = AOUT_VOLUME_MIN;
144 if ( pi_volume != NULL )
145 *pi_volume = i_volume;
147 return __aout_VolumeSet( p_object, i_volume );
150 /*****************************************************************************
151 * aout_VolumeDown : lower the output volume
152 *****************************************************************************
153 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
155 *****************************************************************************/
156 int __aout_VolumeDown( vlc_object_t * p_object, int i_nb_steps,
157 audio_volume_t * pi_volume )
159 return __aout_VolumeUp( p_object, -i_nb_steps, pi_volume );
162 /*****************************************************************************
163 * aout_ToggleMute : Mute/un-mute the output volume
164 *****************************************************************************
165 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
166 * function (muted => 0).
167 *****************************************************************************/
168 int __aout_ToggleMute( vlc_object_t * p_object, audio_volume_t * pi_volume )
170 return aout_SetMute( p_object, pi_volume, !aout_IsMuted( p_object ) );
173 /*****************************************************************************
174 * aout_IsMuted : Get the output volume mute status
175 *****************************************************************************/
176 bool aout_IsMuted( vlc_object_t * p_object )
178 return (bool)var_GetBool( p_object->p_libvlc, "volume-muted");
181 /*****************************************************************************
182 * aout_SetMute : Sets mute status
183 *****************************************************************************
184 * If pi_volume != NULL, *pi_volume will contain the volume at the end of the
185 * function (muted => 0).
186 *****************************************************************************/
187 int aout_SetMute( vlc_object_t * p_object, audio_volume_t * pi_volume,
191 audio_volume_t i_volume;
193 var_SetBool( p_object->p_libvlc, "volume-muted", (bool)b_mute );
194 i_volume = (audio_volume_t)config_GetInt( p_object, "volume" );
199 i_result = aout_VolumeSet( p_object, AOUT_VOLUME_MIN );
200 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
201 var_SetInteger( p_object->p_libvlc, "saved-volume", (int)i_volume );
202 if ( pi_volume != NULL ) *pi_volume = AOUT_VOLUME_MIN;
207 var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER );
208 i_volume = (audio_volume_t)var_GetInteger( p_object->p_libvlc,
210 i_result = aout_VolumeSet( p_object, i_volume );
211 if ( pi_volume != NULL ) *pi_volume = i_volume;
217 * The next functions are not supposed to be called by the interface, but
218 * are placeholders for software-only scaling.
221 /* Meant to be called by the output plug-in's Open(). */
222 void aout_VolumeSoftInit( aout_instance_t * p_aout )
226 p_aout->output.pf_volume_get = aout_VolumeSoftGet;
227 p_aout->output.pf_volume_set = aout_VolumeSoftSet;
229 i_volume = config_GetInt( p_aout, "volume" );
230 if ( i_volume < AOUT_VOLUME_MIN )
232 i_volume = AOUT_VOLUME_DEFAULT;
234 else if ( i_volume > AOUT_VOLUME_MAX )
236 i_volume = AOUT_VOLUME_MAX;
239 aout_VolumeSoftSet( p_aout, (audio_volume_t)i_volume );
242 /* Placeholder for pf_volume_get(). */
243 int aout_VolumeSoftGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
245 *pi_volume = p_aout->output.i_volume;
250 /* Placeholder for pf_volume_set(). */
251 int aout_VolumeSoftSet( aout_instance_t * p_aout, audio_volume_t i_volume )
253 aout_MixerMultiplierSet( p_aout, (float)i_volume / AOUT_VOLUME_DEFAULT );
254 p_aout->output.i_volume = i_volume;
259 * The next functions are not supposed to be called by the interface, but
260 * are placeholders for unsupported scaling.
263 /* Meant to be called by the output plug-in's Open(). */
264 void aout_VolumeNoneInit( aout_instance_t * p_aout )
266 p_aout->output.pf_volume_get = aout_VolumeNoneGet;
267 p_aout->output.pf_volume_set = aout_VolumeNoneSet;
270 /* Placeholder for pf_volume_get(). */
271 int aout_VolumeNoneGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
273 (void)p_aout; (void)pi_volume;
277 /* Placeholder for pf_volume_set(). */
278 int aout_VolumeNoneSet( aout_instance_t * p_aout, audio_volume_t i_volume )
280 (void)p_aout; (void)i_volume;
286 * Pipelines management
289 /*****************************************************************************
290 * aout_Restart : re-open the output device and rebuild the input and output
292 *****************************************************************************
293 * This function is used whenever the parameters of the output plug-in are
294 * changed (eg. selecting S/PDIF or PCM).
295 *****************************************************************************/
296 static int aout_Restart( aout_instance_t * p_aout )
301 aout_lock_mixer( p_aout );
303 if ( p_aout->i_nb_inputs == 0 )
305 aout_unlock_mixer( p_aout );
306 msg_Err( p_aout, "no decoder thread" );
310 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
312 aout_lock_input( p_aout, p_aout->pp_inputs[i] );
313 aout_lock_input_fifos( p_aout );
314 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
315 aout_unlock_input_fifos( p_aout );
318 /* Lock all inputs. */
319 aout_lock_input_fifos( p_aout );
320 aout_MixerDelete( p_aout );
322 /* Re-open the output plug-in. */
323 aout_OutputDelete( p_aout );
325 if ( aout_OutputNew( p_aout, &p_aout->pp_inputs[0]->input ) == -1 )
327 /* Release all locks and report the error. */
328 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
330 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
332 aout_unlock_input_fifos( p_aout );
333 aout_unlock_mixer( p_aout );
337 if ( aout_MixerNew( p_aout ) == -1 )
339 aout_OutputDelete( p_aout );
340 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
342 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
344 aout_unlock_input_fifos( p_aout );
345 aout_unlock_mixer( p_aout );
349 /* Re-open all inputs. */
350 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
352 aout_input_t * p_input = p_aout->pp_inputs[i];
353 b_error |= aout_InputNew( p_aout, p_input, &p_input->request_vout );
354 p_input->b_changed = 1;
355 aout_unlock_input( p_aout, p_input );
358 aout_unlock_input_fifos( p_aout );
359 aout_unlock_mixer( p_aout );
364 /*****************************************************************************
365 * aout_FindAndRestart : find the audio output instance and restart
366 *****************************************************************************
367 * This is used for callbacks of the configuration variables, and we believe
368 * that when those are changed, it is a significant change which implies
369 * rebuilding the audio-device and audio-channels variables.
370 *****************************************************************************/
371 int aout_FindAndRestart( vlc_object_t * p_this, const char *psz_name,
372 vlc_value_t oldval, vlc_value_t newval, void *p_data )
374 aout_instance_t * p_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT,
377 (void)psz_name; (void)oldval; (void)newval; (void)p_data;
378 if ( p_aout == NULL ) return VLC_SUCCESS;
380 var_Destroy( p_aout, "audio-device" );
381 var_Destroy( p_aout, "audio-channels" );
383 aout_Restart( p_aout );
384 vlc_object_release( p_aout );
389 /*****************************************************************************
390 * aout_ChannelsRestart : change the audio device or channels and restart
391 *****************************************************************************/
392 int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable,
393 vlc_value_t oldval, vlc_value_t newval,
396 aout_instance_t * p_aout = (aout_instance_t *)p_this;
397 (void)oldval; (void)newval; (void)p_data;
399 if ( !strcmp( psz_variable, "audio-device" ) )
401 /* This is supposed to be a significant change and supposes
402 * rebuilding the channel choices. */
403 var_Destroy( p_aout, "audio-channels" );
405 aout_Restart( p_aout );
409 #undef aout_EnableFilter
410 /** Enable or disable an audio filter
411 * \param p_this a vlc object
412 * \param psz_name name of the filter
413 * \param b_add are we adding or removing the filter ?
415 void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
418 aout_instance_t *p_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT,
421 if( AoutChangeFilterString( p_this, p_aout, "audio-filter", psz_name, b_add ) )
424 AoutInputsMarkToRestart( p_aout );
428 vlc_object_release( p_aout );