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 *(*pf_find_input) (vlc_object_t *);
47 pf_find_input = var_GetAddress (obj, "find-input-callback");
48 if (unlikely(pf_find_input == NULL))
51 input_thread_t *p_input = pf_find_input (obj);
55 aout_instance_t *p_aout = input_GetAout (p_input);
56 vlc_object_release (p_input);
59 #define findAout(o) findAout(VLC_OBJECT(o))
61 /** Start a volume change transaction. */
62 static void prepareVolume (vlc_object_t *obj, aout_instance_t **aoutp,
63 audio_volume_t *volp, bool *mutep)
65 aout_instance_t *aout = findAout (obj);
67 /* FIXME: we need interlocking even if aout does not exist! */
70 aout_lock_volume (aout);
72 *volp = var_GetInteger (obj, "volume");
74 *mutep = var_GetBool (obj, "mute");
77 /** Commit a volume change transaction. */
78 static int commitVolume (vlc_object_t *obj, aout_instance_t *aout,
79 audio_volume_t *volp, bool mute)
83 audio_volume_t volume = *volp;
84 if (volume < AOUT_VOLUME_MIN)
85 volume = AOUT_VOLUME_MIN;
86 if (volume > AOUT_VOLUME_MAX)
87 volume = AOUT_VOLUME_MAX;
90 var_SetInteger (obj, "volume", volume);
91 var_SetBool (obj, "mute", mute);
95 aout_lock_mixer (aout);
96 aout_lock_input_fifos (aout);
97 if (aout->p_mixer != NULL)
98 ret = aout->output.pf_volume_set (aout, volume, mute);
99 aout_unlock_input_fifos (aout);
100 aout_unlock_mixer (aout);
103 var_TriggerCallback (aout, "intf-change");
104 aout_unlock_volume (aout);
105 vlc_object_release (aout);
111 /** Cancel a volume change transaction. */
112 static void cancelVolume (vlc_object_t *obj, aout_instance_t *aout)
117 aout_unlock_volume (aout);
118 vlc_object_release (aout);
123 #undef aout_VolumeGet
125 * Gets the volume of the output device (independent of mute).
127 audio_volume_t aout_VolumeGet (vlc_object_t *obj)
130 aout_instance_t *aout;
131 audio_volume_t volume;
133 prepareVolume (obj, &aout, &volume, NULL);
134 cancelVolume (obj, aout);
137 return var_GetInteger (obj, "volume");
141 #undef aout_VolumeSet
143 * Sets the volume of the output device.
144 * The mute status is not changed.
146 int aout_VolumeSet (vlc_object_t *obj, audio_volume_t volume)
148 aout_instance_t *aout;
151 prepareVolume (obj, &aout, NULL, &mute);
152 return commitVolume (obj, aout, &volume, mute);
158 * \param volp if non-NULL, will contain contain the resulting volume
160 int aout_VolumeUp (vlc_object_t *obj, int steps, audio_volume_t *volp)
162 aout_instance_t *aout;
164 int stepsize = var_InheritInteger (obj, "volume-step");
165 audio_volume_t volume;
168 prepareVolume (obj, &aout, &volume, &mute);
169 volume += stepsize * steps;
170 ret = commitVolume (obj, aout, &volume, mute);
176 #undef aout_VolumeDown
178 * Lowers the volume. See aout_VolumeUp().
180 int aout_VolumeDown (vlc_object_t *obj, int steps, audio_volume_t *volp)
182 return aout_VolumeUp (obj, -steps, volp);
185 #undef aout_ToggleMute
187 * Toggles the mute state.
189 int aout_ToggleMute (vlc_object_t *obj, audio_volume_t *volp)
191 aout_instance_t *aout;
193 audio_volume_t volume;
196 prepareVolume (obj, &aout, &volume, &mute);
198 ret = commitVolume (obj, aout, &volume, mute);
200 *volp = mute ? AOUT_VOLUME_MIN : volume;
205 * Gets the output mute status.
207 bool aout_IsMuted (vlc_object_t *obj)
210 aout_instance_t *aout;
213 prepareVolume (obj, &aout, NULL, &mute);
214 cancelVolume (obj, aout);
217 return var_GetBool (obj, "mute");
224 int aout_SetMute (vlc_object_t *obj, audio_volume_t *volp, bool mute)
226 aout_instance_t *aout;
228 audio_volume_t volume;
230 prepareVolume (obj, &aout, &volume, NULL);
231 ret = commitVolume (obj, aout, &volume, mute);
233 *volp = mute ? AOUT_VOLUME_MIN : volume;
239 * The next functions are not supposed to be called by the interface, but
240 * are placeholders for software-only scaling.
242 static int aout_VolumeSoftSet (aout_instance_t *aout, audio_volume_t volume,
245 float f = mute ? 0. : (volume / (float)AOUT_VOLUME_DEFAULT);
246 aout_MixerMultiplierSet (aout, f);
250 /* Meant to be called by the output plug-in's Open(). */
251 void aout_VolumeSoftInit (aout_instance_t *aout)
253 audio_volume_t volume = var_InheritInteger (aout, "volume");
254 bool mute = var_InheritBool (aout, "mute");
256 aout->output.pf_volume_set = aout_VolumeSoftSet;
257 aout_VolumeSoftSet (aout, volume, mute);
262 * The next functions are not supposed to be called by the interface, but
263 * are placeholders for unsupported scaling.
265 static int aout_VolumeNoneSet (aout_instance_t *aout, audio_volume_t volume,
268 (void)aout; (void)volume; (void)mute;
272 /* Meant to be called by the output plug-in's Open(). */
273 void aout_VolumeNoneInit( aout_instance_t * p_aout )
275 p_aout->output.pf_volume_set = aout_VolumeNoneSet;
280 * Pipelines management
283 /*****************************************************************************
284 * aout_Restart : re-open the output device and rebuild the input and output
286 *****************************************************************************
287 * This function is used whenever the parameters of the output plug-in are
288 * changed (eg. selecting S/PDIF or PCM).
289 *****************************************************************************/
290 static int aout_Restart( aout_instance_t * p_aout )
295 aout_lock_mixer( p_aout );
297 if ( p_aout->i_nb_inputs == 0 )
299 aout_unlock_mixer( p_aout );
300 msg_Err( p_aout, "no decoder thread" );
304 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
306 aout_lock_input( p_aout, p_aout->pp_inputs[i] );
307 aout_lock_input_fifos( p_aout );
308 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
309 aout_unlock_input_fifos( p_aout );
312 /* Lock all inputs. */
313 aout_lock_input_fifos( p_aout );
314 aout_MixerDelete( p_aout );
316 /* Re-open the output plug-in. */
317 aout_OutputDelete( p_aout );
319 if ( aout_OutputNew( p_aout, &p_aout->pp_inputs[0]->input ) == -1 )
321 /* Release all locks and report the error. */
322 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
324 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
326 aout_unlock_input_fifos( p_aout );
327 aout_unlock_mixer( p_aout );
331 if ( aout_MixerNew( p_aout ) == -1 )
333 aout_OutputDelete( p_aout );
334 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
336 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
338 aout_unlock_input_fifos( p_aout );
339 aout_unlock_mixer( p_aout );
343 /* Re-open all inputs. */
344 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
346 aout_input_t * p_input = p_aout->pp_inputs[i];
347 b_error |= aout_InputNew( p_aout, p_input, &p_input->request_vout );
348 p_input->b_changed = 1;
349 aout_unlock_input( p_aout, p_input );
352 aout_unlock_input_fifos( p_aout );
353 aout_unlock_mixer( p_aout );
358 /*****************************************************************************
359 * aout_ChannelsRestart : change the audio device or channels and restart
360 *****************************************************************************/
361 int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable,
362 vlc_value_t oldval, vlc_value_t newval,
365 aout_instance_t * p_aout = (aout_instance_t *)p_this;
366 (void)oldval; (void)newval; (void)p_data;
368 if ( !strcmp( psz_variable, "audio-device" ) )
370 /* This is supposed to be a significant change and supposes
371 * rebuilding the channel choices. */
372 var_Destroy( p_aout, "audio-channels" );
374 aout_Restart( p_aout );
378 #undef aout_EnableFilter
379 /** Enable or disable an audio filter
380 * \param p_this a vlc object
381 * \param psz_name name of the filter
382 * \param b_add are we adding or removing the filter ?
384 void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
387 aout_instance_t *p_aout = findAout( p_this );
389 if( aout_ChangeFilterString( p_this, p_aout, "audio-filter", psz_name, b_add ) )
392 AoutInputsMarkToRestart( p_aout );
396 vlc_object_release( p_aout );