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 aout_owner_t *owner = aout_owner (aout);
90 float vol = volume / (float)AOUT_VOLUME_DEFAULT;
93 if (owner->module != NULL)
94 ret = aout->pf_volume_set (aout, vol, mute);
96 aout_unlock_volume (aout);
99 var_TriggerCallback (aout, "intf-change");
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);
170 if (value > AOUT_VOLUME_MAX)
171 volume = AOUT_VOLUME_MAX;
174 ret = commitVolume (obj, aout, volume, mute);
180 #undef aout_ToggleMute
182 * Toggles the mute state.
184 int aout_ToggleMute (vlc_object_t *obj, audio_volume_t *volp)
186 audio_output_t *aout;
188 audio_volume_t volume;
191 prepareVolume (obj, &aout, &volume, &mute);
193 ret = commitVolume (obj, aout, volume, mute);
195 *volp = mute ? 0 : volume;
200 * Gets the output mute status.
202 bool aout_IsMuted (vlc_object_t *obj)
205 audio_output_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 audio_output_t *aout;
223 audio_volume_t volume;
225 prepareVolume (obj, &aout, &volume, NULL);
226 ret = commitVolume (obj, aout, volume, mute);
228 *volp = mute ? 0 : volume;
234 * Pipelines management
238 * Marks the audio output for restart, to update any parameter of the output
239 * plug-in (e.g. output device or channel mapping).
241 static void aout_Restart (audio_output_t *aout)
243 aout_owner_t *owner = aout_owner (aout);
246 if (owner->input != NULL)
247 owner->need_restart = true;
251 /*****************************************************************************
252 * aout_ChannelsRestart : change the audio device or channels and restart
253 *****************************************************************************/
254 int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable,
255 vlc_value_t oldval, vlc_value_t newval,
258 audio_output_t * p_aout = (audio_output_t *)p_this;
259 (void)oldval; (void)newval; (void)p_data;
261 if ( !strcmp( psz_variable, "audio-device" ) )
263 /* This is supposed to be a significant change and supposes
264 * rebuilding the channel choices. */
265 var_Destroy( p_aout, "audio-channels" );
267 aout_Restart( p_aout );
271 #undef aout_EnableFilter
272 /** Enable or disable an audio filter
273 * \param p_this a vlc object
274 * \param psz_name name of the filter
275 * \param b_add are we adding or removing the filter ?
277 void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
280 audio_output_t *p_aout = findAout( p_this );
282 if( aout_ChangeFilterString( p_this, p_aout, "audio-filter", psz_name, b_add ) )
285 AoutInputsMarkToRestart( p_aout );
289 vlc_object_release( p_aout );