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 volume, bool mute)
83 var_SetInteger (obj, "volume", volume);
85 volume = AOUT_VOLUME_MIN;
86 var_SetBool (obj, "mute", mute);
90 aout_lock_mixer (aout);
91 aout_lock_input_fifos (aout);
92 if (aout->p_mixer != NULL)
93 ret = aout->output.pf_volume_set (aout, volume);
94 aout_unlock_input_fifos (aout);
95 aout_unlock_mixer (aout);
98 var_SetBool (aout, "intf-change", true);
99 aout_unlock_volume (aout);
100 vlc_object_release (aout);
106 /** Cancel a volume change transaction. */
107 static void cancelVolume (vlc_object_t *obj, aout_instance_t *aout)
112 aout_unlock_volume (aout);
113 vlc_object_release (aout);
118 #undef aout_VolumeGet
120 * Gets the volume of the output device (independent of mute).
122 audio_volume_t aout_VolumeGet (vlc_object_t *obj)
125 aout_instance_t *aout;
126 audio_volume_t volume;
128 prepareVolume (obj, &aout, &volume, NULL);
129 cancelVolume (obj, aout);
132 return var_GetInteger (obj, "volume");
136 #undef aout_VolumeSet
138 * Sets the volume of the output device.
139 * The mute status is not changed.
141 int aout_VolumeSet (vlc_object_t *obj, audio_volume_t volume)
143 aout_instance_t *aout;
146 prepareVolume (obj, &aout, NULL, &mute);
147 return commitVolume (obj, aout, volume, mute);
153 * \param volp if non-NULL, will contain contain the resulting volume
155 int aout_VolumeUp (vlc_object_t *obj, int steps, audio_volume_t *volp)
157 aout_instance_t *aout;
159 int stepsize = var_InheritInteger (obj, "volume-step");
160 audio_volume_t volume;
163 prepareVolume (obj, &aout, &volume, &mute);
164 volume += stepsize * steps;
165 ret = commitVolume (obj, aout, volume, mute);
171 #undef aout_VolumeDown
173 * Lowers the volume. See aout_VolumeUp().
175 int aout_VolumeDown (vlc_object_t *obj, int steps, audio_volume_t *volp)
177 return aout_VolumeUp (obj, -steps, volp);
180 #undef aout_ToggleMute
182 * Toggles the mute state.
184 int aout_ToggleMute (vlc_object_t *obj, audio_volume_t *volp)
186 aout_instance_t *aout;
188 audio_volume_t volume;
191 prepareVolume (obj, &aout, &volume, &mute);
193 ret = commitVolume (obj, aout, volume, mute);
195 *volp = mute ? AOUT_VOLUME_MIN : volume;
200 * Gets the output mute status.
202 bool aout_IsMuted (vlc_object_t *obj)
205 aout_instance_t *aout;
208 prepareVolume (obj, &aout, NULL, &mute);
209 cancelVolume (obj, aout);
212 return var_GetBool (obj, "mute");
219 int aout_SetMute (vlc_object_t *obj, audio_volume_t *volp, bool mute)
221 aout_instance_t *aout;
223 audio_volume_t volume;
225 prepareVolume (obj, &aout, &volume, NULL);
226 ret = commitVolume (obj, aout, volume, mute);
228 *volp = mute ? AOUT_VOLUME_MIN : volume;
233 * The next functions are not supposed to be called by the interface, but
234 * are placeholders for software-only scaling.
237 /* Meant to be called by the output plug-in's Open(). */
238 void aout_VolumeSoftInit( aout_instance_t * p_aout )
242 p_aout->output.pf_volume_set = aout_VolumeSoftSet;
244 i_volume = var_InheritInteger( p_aout, "volume" );
245 if ( i_volume < AOUT_VOLUME_MIN )
247 i_volume = AOUT_VOLUME_DEFAULT;
249 else if ( i_volume > AOUT_VOLUME_MAX )
251 i_volume = AOUT_VOLUME_MAX;
254 aout_VolumeSoftSet( p_aout, (audio_volume_t)i_volume );
257 /* Placeholder for pf_volume_set(). */
258 int aout_VolumeSoftSet( aout_instance_t * p_aout, audio_volume_t i_volume )
260 aout_MixerMultiplierSet( p_aout, (float)i_volume / AOUT_VOLUME_DEFAULT );
261 p_aout->output.i_volume = i_volume;
266 * The next functions are not supposed to be called by the interface, but
267 * are placeholders for unsupported scaling.
270 /* Meant to be called by the output plug-in's Open(). */
271 void aout_VolumeNoneInit( aout_instance_t * p_aout )
273 p_aout->output.pf_volume_set = aout_VolumeNoneSet;
276 /* Placeholder for pf_volume_set(). */
277 int aout_VolumeNoneSet( aout_instance_t * p_aout, audio_volume_t i_volume )
279 (void)p_aout; (void)i_volume;
285 * Pipelines management
288 /*****************************************************************************
289 * aout_Restart : re-open the output device and rebuild the input and output
291 *****************************************************************************
292 * This function is used whenever the parameters of the output plug-in are
293 * changed (eg. selecting S/PDIF or PCM).
294 *****************************************************************************/
295 static int aout_Restart( aout_instance_t * p_aout )
300 aout_lock_mixer( p_aout );
302 if ( p_aout->i_nb_inputs == 0 )
304 aout_unlock_mixer( p_aout );
305 msg_Err( p_aout, "no decoder thread" );
309 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
311 aout_lock_input( p_aout, p_aout->pp_inputs[i] );
312 aout_lock_input_fifos( p_aout );
313 aout_InputDelete( p_aout, p_aout->pp_inputs[i] );
314 aout_unlock_input_fifos( p_aout );
317 /* Lock all inputs. */
318 aout_lock_input_fifos( p_aout );
319 aout_MixerDelete( p_aout );
321 /* Re-open the output plug-in. */
322 aout_OutputDelete( p_aout );
324 if ( aout_OutputNew( p_aout, &p_aout->pp_inputs[0]->input ) == -1 )
326 /* Release all locks and report the error. */
327 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
329 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
331 aout_unlock_input_fifos( p_aout );
332 aout_unlock_mixer( p_aout );
336 if ( aout_MixerNew( p_aout ) == -1 )
338 aout_OutputDelete( p_aout );
339 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
341 vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock );
343 aout_unlock_input_fifos( p_aout );
344 aout_unlock_mixer( p_aout );
348 /* Re-open all inputs. */
349 for ( i = 0; i < p_aout->i_nb_inputs; i++ )
351 aout_input_t * p_input = p_aout->pp_inputs[i];
352 b_error |= aout_InputNew( p_aout, p_input, &p_input->request_vout );
353 p_input->b_changed = 1;
354 aout_unlock_input( p_aout, p_input );
357 aout_unlock_input_fifos( p_aout );
358 aout_unlock_mixer( p_aout );
363 /*****************************************************************************
364 * aout_ChannelsRestart : change the audio device or channels and restart
365 *****************************************************************************/
366 int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable,
367 vlc_value_t oldval, vlc_value_t newval,
370 aout_instance_t * p_aout = (aout_instance_t *)p_this;
371 (void)oldval; (void)newval; (void)p_data;
373 if ( !strcmp( psz_variable, "audio-device" ) )
375 /* This is supposed to be a significant change and supposes
376 * rebuilding the channel choices. */
377 var_Destroy( p_aout, "audio-channels" );
379 aout_Restart( p_aout );
383 #undef aout_EnableFilter
384 /** Enable or disable an audio filter
385 * \param p_this a vlc object
386 * \param psz_name name of the filter
387 * \param b_add are we adding or removing the filter ?
389 void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
392 aout_instance_t *p_aout = findAout( p_this );
394 if( aout_ChangeFilterString( p_this, p_aout, "audio-filter", psz_name, b_add ) )
397 AoutInputsMarkToRestart( p_aout );
401 vlc_object_release( p_aout );