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>
33 #include <vlc_aout_intf.h>
36 #include <stdlib.h> /* calloc(), malloc(), free() */
40 #include "aout_internal.h"
42 #include <vlc_playlist.h>
44 static audio_output_t *findAout (vlc_object_t *obj)
46 input_thread_t *(*pf_find_input) (vlc_object_t *);
48 pf_find_input = var_GetAddress (obj, "find-input-callback");
49 if (unlikely(pf_find_input == NULL))
52 input_thread_t *p_input = pf_find_input (obj);
56 audio_output_t *p_aout = input_GetAout (p_input);
57 vlc_object_release (p_input);
60 #define findAout(o) findAout(VLC_OBJECT(o))
62 /** Start a volume change transaction. */
63 static void prepareVolume (vlc_object_t *obj, audio_output_t **aoutp,
64 audio_volume_t *volp, bool *mutep)
66 audio_output_t *aout = findAout (obj);
68 /* FIXME: we need interlocking even if aout does not exist! */
71 aout_lock_volume (aout);
73 *volp = var_GetInteger (obj, "volume");
75 *mutep = var_GetBool (obj, "mute");
78 /** Commit a volume change transaction. */
79 static int commitVolume (vlc_object_t *obj, audio_output_t *aout,
80 audio_volume_t volume, bool mute)
84 var_SetInteger (obj, "volume", volume);
85 var_SetBool (obj, "mute", mute);
89 float vol = volume / (float)AOUT_VOLUME_DEFAULT;
92 #warning FIXME: wrong test. Need to check that aout_output is ready.
93 if (aout->p_mixer != NULL)
94 ret = aout->pf_volume_set (aout, vol, mute);
98 var_TriggerCallback (aout, "intf-change");
99 aout_unlock_volume (aout);
100 vlc_object_release (aout);
106 /** Cancel a volume change transaction. */
107 static void cancelVolume (vlc_object_t *obj, audio_output_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 audio_output_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 audio_output_t *aout;
146 prepareVolume (obj, &aout, NULL, &mute);
147 return commitVolume (obj, aout, volume, mute);
153 * \param value how much to increase (> 0) or decrease (< 0) the volume
154 * \param volp if non-NULL, will contain contain the resulting volume
156 int aout_VolumeUp (vlc_object_t *obj, int value, audio_volume_t *volp)
158 audio_output_t *aout;
160 audio_volume_t volume;
163 value *= var_InheritInteger (obj, "volume-step");
165 prepareVolume (obj, &aout, &volume, &mute);
167 if (value < AOUT_VOLUME_MIN)
168 volume = AOUT_VOLUME_MIN;
170 if (value > AOUT_VOLUME_MAX)
171 volume = AOUT_VOLUME_MAX;
174 ret = commitVolume (obj, aout, volume, mute);
180 #undef aout_VolumeDown
182 * Lowers the volume. See aout_VolumeUp().
184 int aout_VolumeDown (vlc_object_t *obj, int steps, audio_volume_t *volp)
186 return aout_VolumeUp (obj, -steps, volp);
189 #undef aout_ToggleMute
191 * Toggles the mute state.
193 int aout_ToggleMute (vlc_object_t *obj, audio_volume_t *volp)
195 audio_output_t *aout;
197 audio_volume_t volume;
200 prepareVolume (obj, &aout, &volume, &mute);
202 ret = commitVolume (obj, aout, volume, mute);
204 *volp = mute ? AOUT_VOLUME_MIN : volume;
209 * Gets the output mute status.
211 bool aout_IsMuted (vlc_object_t *obj)
214 audio_output_t *aout;
217 prepareVolume (obj, &aout, NULL, &mute);
218 cancelVolume (obj, aout);
221 return var_GetBool (obj, "mute");
228 int aout_SetMute (vlc_object_t *obj, audio_volume_t *volp, bool mute)
230 audio_output_t *aout;
232 audio_volume_t volume;
234 prepareVolume (obj, &aout, &volume, NULL);
235 ret = commitVolume (obj, aout, volume, mute);
237 *volp = mute ? AOUT_VOLUME_MIN : volume;
243 * The next functions are not supposed to be called by the interface, but
244 * are placeholders for software-only scaling.
246 static int aout_VolumeSoftSet (audio_output_t *aout, float volume, bool mute)
248 aout->mixer_multiplier = mute ? 0. : volume;
252 /* Meant to be called by the output plug-in's Open(). */
253 void aout_VolumeSoftInit (audio_output_t *aout)
255 audio_volume_t volume = var_InheritInteger (aout, "volume");
256 bool mute = var_InheritBool (aout, "mute");
258 aout->pf_volume_set = aout_VolumeSoftSet;
259 aout_VolumeSoftSet (aout, volume / (float)AOUT_VOLUME_DEFAULT, mute);
264 * The next functions are not supposed to be called by the interface, but
265 * are placeholders for unsupported scaling.
267 static int aout_VolumeNoneSet (audio_output_t *aout, float volume, bool mute)
269 (void)aout; (void)volume; (void)mute;
273 /* Meant to be called by the output plug-in's Open(). */
274 void aout_VolumeNoneInit( audio_output_t * p_aout )
276 p_aout->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( audio_output_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 audio_output_t * p_aout = (audio_output_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 audio_output_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 );