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);
84 var_SetBool (obj, "mute", mute);
89 #warning FIXME: wrong test. Need to check that aout_output is ready.
90 if (aout->p_mixer != NULL)
91 ret = aout->output.pf_volume_set (aout, volume, mute);
95 var_TriggerCallback (aout, "intf-change");
96 aout_unlock_volume (aout);
97 vlc_object_release (aout);
103 /** Cancel a volume change transaction. */
104 static void cancelVolume (vlc_object_t *obj, aout_instance_t *aout)
109 aout_unlock_volume (aout);
110 vlc_object_release (aout);
115 #undef aout_VolumeGet
117 * Gets the volume of the output device (independent of mute).
119 audio_volume_t aout_VolumeGet (vlc_object_t *obj)
122 aout_instance_t *aout;
123 audio_volume_t volume;
125 prepareVolume (obj, &aout, &volume, NULL);
126 cancelVolume (obj, aout);
129 return var_GetInteger (obj, "volume");
133 #undef aout_VolumeSet
135 * Sets the volume of the output device.
136 * The mute status is not changed.
138 int aout_VolumeSet (vlc_object_t *obj, audio_volume_t volume)
140 aout_instance_t *aout;
143 prepareVolume (obj, &aout, NULL, &mute);
144 return commitVolume (obj, aout, volume, mute);
150 * \param value how much to increase (> 0) or decrease (< 0) the volume
151 * \param volp if non-NULL, will contain contain the resulting volume
153 int aout_VolumeUp (vlc_object_t *obj, int value, audio_volume_t *volp)
155 aout_instance_t *aout;
157 audio_volume_t volume;
160 value *= var_InheritInteger (obj, "volume-step");
162 prepareVolume (obj, &aout, &volume, &mute);
164 if (value < AOUT_VOLUME_MIN)
165 volume = AOUT_VOLUME_MIN;
167 if (value > AOUT_VOLUME_MAX)
168 volume = AOUT_VOLUME_MAX;
171 ret = commitVolume (obj, aout, volume, mute);
177 #undef aout_VolumeDown
179 * Lowers the volume. See aout_VolumeUp().
181 int aout_VolumeDown (vlc_object_t *obj, int steps, audio_volume_t *volp)
183 return aout_VolumeUp (obj, -steps, volp);
186 #undef aout_ToggleMute
188 * Toggles the mute state.
190 int aout_ToggleMute (vlc_object_t *obj, audio_volume_t *volp)
192 aout_instance_t *aout;
194 audio_volume_t volume;
197 prepareVolume (obj, &aout, &volume, &mute);
199 ret = commitVolume (obj, aout, volume, mute);
201 *volp = mute ? AOUT_VOLUME_MIN : volume;
206 * Gets the output mute status.
208 bool aout_IsMuted (vlc_object_t *obj)
211 aout_instance_t *aout;
214 prepareVolume (obj, &aout, NULL, &mute);
215 cancelVolume (obj, aout);
218 return var_GetBool (obj, "mute");
225 int aout_SetMute (vlc_object_t *obj, audio_volume_t *volp, bool mute)
227 aout_instance_t *aout;
229 audio_volume_t volume;
231 prepareVolume (obj, &aout, &volume, NULL);
232 ret = commitVolume (obj, aout, volume, mute);
234 *volp = mute ? AOUT_VOLUME_MIN : volume;
240 * The next functions are not supposed to be called by the interface, but
241 * are placeholders for software-only scaling.
243 static int aout_VolumeSoftSet (aout_instance_t *aout, audio_volume_t volume,
246 float f = mute ? 0. : (volume / (float)AOUT_VOLUME_DEFAULT);
247 aout->mixer_multiplier = f;
251 /* Meant to be called by the output plug-in's Open(). */
252 void aout_VolumeSoftInit (aout_instance_t *aout)
254 audio_volume_t volume = var_InheritInteger (aout, "volume");
255 bool mute = var_InheritBool (aout, "mute");
257 aout->output.pf_volume_set = aout_VolumeSoftSet;
258 aout_VolumeSoftSet (aout, volume, mute);
263 * The next functions are not supposed to be called by the interface, but
264 * are placeholders for unsupported scaling.
266 static int aout_VolumeNoneSet (aout_instance_t *aout, audio_volume_t volume,
269 (void)aout; (void)volume; (void)mute;
273 /* Meant to be called by the output plug-in's Open(). */
274 void aout_VolumeNoneInit( aout_instance_t * p_aout )
276 p_aout->output.pf_volume_set = aout_VolumeNoneSet;
281 * Pipelines management
284 /*****************************************************************************
285 * aout_Restart : re-open the output device and rebuild the input and output
287 *****************************************************************************
288 * This function is used whenever the parameters of the output plug-in are
289 * changed (eg. selecting S/PDIF or PCM).
290 *****************************************************************************/
291 static int aout_Restart( aout_instance_t * p_aout )
293 aout_input_t *p_input;
296 p_input = p_aout->p_input;
297 if( p_input == NULL )
299 aout_unlock( p_aout );
300 msg_Err( p_aout, "no decoder thread" );
304 /* Reinitializes the output */
305 aout_InputDelete( p_aout, p_input );
306 aout_MixerDelete( p_aout );
307 aout_OutputDelete( p_aout );
309 /* FIXME: This function is notoriously dangerous/unsafe.
310 * By the way, if OutputNew or MixerNew fails, we are totally screwed. */
311 if ( aout_OutputNew( p_aout, &p_input->input ) == -1 )
313 /* Release all locks and report the error. */
314 aout_unlock( p_aout );
318 if ( aout_MixerNew( p_aout ) == -1 )
320 aout_OutputDelete( p_aout );
321 aout_unlock( p_aout );
325 if( aout_InputNew( p_aout, p_input, &p_input->request_vout ) )
327 #warning FIXME: deal with errors
328 aout_unlock( p_aout );
331 aout_unlock( p_aout );
335 /*****************************************************************************
336 * aout_ChannelsRestart : change the audio device or channels and restart
337 *****************************************************************************/
338 int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable,
339 vlc_value_t oldval, vlc_value_t newval,
342 aout_instance_t * p_aout = (aout_instance_t *)p_this;
343 (void)oldval; (void)newval; (void)p_data;
345 if ( !strcmp( psz_variable, "audio-device" ) )
347 /* This is supposed to be a significant change and supposes
348 * rebuilding the channel choices. */
349 var_Destroy( p_aout, "audio-channels" );
351 aout_Restart( p_aout );
355 #undef aout_EnableFilter
356 /** Enable or disable an audio filter
357 * \param p_this a vlc object
358 * \param psz_name name of the filter
359 * \param b_add are we adding or removing the filter ?
361 void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
364 aout_instance_t *p_aout = findAout( p_this );
366 if( aout_ChangeFilterString( p_this, p_aout, "audio-filter", psz_name, b_add ) )
369 AoutInputsMarkToRestart( p_aout );
373 vlc_object_release( p_aout );