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 aout_instance_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 aout_instance_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, aout_instance_t **aoutp,
64 audio_volume_t *volp, bool *mutep)
66 aout_instance_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, aout_instance_t *aout,
80 audio_volume_t volume, bool mute)
84 var_SetInteger (obj, "volume", volume);
85 var_SetBool (obj, "mute", mute);
90 #warning FIXME: wrong test. Need to check that aout_output is ready.
91 if (aout->p_mixer != NULL)
92 ret = aout->output.pf_volume_set (aout, volume, mute);
96 var_TriggerCallback (aout, "intf-change");
97 aout_unlock_volume (aout);
98 vlc_object_release (aout);
104 /** Cancel a volume change transaction. */
105 static void cancelVolume (vlc_object_t *obj, aout_instance_t *aout)
110 aout_unlock_volume (aout);
111 vlc_object_release (aout);
116 #undef aout_VolumeGet
118 * Gets the volume of the output device (independent of mute).
120 audio_volume_t aout_VolumeGet (vlc_object_t *obj)
123 aout_instance_t *aout;
124 audio_volume_t volume;
126 prepareVolume (obj, &aout, &volume, NULL);
127 cancelVolume (obj, aout);
130 return var_GetInteger (obj, "volume");
134 #undef aout_VolumeSet
136 * Sets the volume of the output device.
137 * The mute status is not changed.
139 int aout_VolumeSet (vlc_object_t *obj, audio_volume_t volume)
141 aout_instance_t *aout;
144 prepareVolume (obj, &aout, NULL, &mute);
145 return commitVolume (obj, aout, volume, mute);
151 * \param value how much to increase (> 0) or decrease (< 0) the volume
152 * \param volp if non-NULL, will contain contain the resulting volume
154 int aout_VolumeUp (vlc_object_t *obj, int value, audio_volume_t *volp)
156 aout_instance_t *aout;
158 audio_volume_t volume;
161 value *= var_InheritInteger (obj, "volume-step");
163 prepareVolume (obj, &aout, &volume, &mute);
165 if (value < AOUT_VOLUME_MIN)
166 volume = AOUT_VOLUME_MIN;
168 if (value > AOUT_VOLUME_MAX)
169 volume = AOUT_VOLUME_MAX;
172 ret = commitVolume (obj, aout, volume, mute);
178 #undef aout_VolumeDown
180 * Lowers the volume. See aout_VolumeUp().
182 int aout_VolumeDown (vlc_object_t *obj, int steps, audio_volume_t *volp)
184 return aout_VolumeUp (obj, -steps, volp);
187 #undef aout_ToggleMute
189 * Toggles the mute state.
191 int aout_ToggleMute (vlc_object_t *obj, audio_volume_t *volp)
193 aout_instance_t *aout;
195 audio_volume_t volume;
198 prepareVolume (obj, &aout, &volume, &mute);
200 ret = commitVolume (obj, aout, volume, mute);
202 *volp = mute ? AOUT_VOLUME_MIN : volume;
207 * Gets the output mute status.
209 bool aout_IsMuted (vlc_object_t *obj)
212 aout_instance_t *aout;
215 prepareVolume (obj, &aout, NULL, &mute);
216 cancelVolume (obj, aout);
219 return var_GetBool (obj, "mute");
226 int aout_SetMute (vlc_object_t *obj, audio_volume_t *volp, bool mute)
228 aout_instance_t *aout;
230 audio_volume_t volume;
232 prepareVolume (obj, &aout, &volume, NULL);
233 ret = commitVolume (obj, aout, volume, mute);
235 *volp = mute ? AOUT_VOLUME_MIN : volume;
241 * The next functions are not supposed to be called by the interface, but
242 * are placeholders for software-only scaling.
244 static int aout_VolumeSoftSet (aout_instance_t *aout, audio_volume_t volume,
247 float f = mute ? 0. : (volume / (float)AOUT_VOLUME_DEFAULT);
248 aout->mixer_multiplier = f;
252 /* Meant to be called by the output plug-in's Open(). */
253 void aout_VolumeSoftInit (aout_instance_t *aout)
255 audio_volume_t volume = var_InheritInteger (aout, "volume");
256 bool mute = var_InheritBool (aout, "mute");
258 aout->output.pf_volume_set = aout_VolumeSoftSet;
259 aout_VolumeSoftSet (aout, volume, 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 (aout_instance_t *aout, audio_volume_t volume,
270 (void)aout; (void)volume; (void)mute;
274 /* Meant to be called by the output plug-in's Open(). */
275 void aout_VolumeNoneInit( aout_instance_t * p_aout )
277 p_aout->output.pf_volume_set = aout_VolumeNoneSet;
282 * Pipelines management
285 /*****************************************************************************
286 * aout_Restart : re-open the output device and rebuild the input and output
288 *****************************************************************************
289 * This function is used whenever the parameters of the output plug-in are
290 * changed (eg. selecting S/PDIF or PCM).
291 *****************************************************************************/
292 static int aout_Restart( aout_instance_t * p_aout )
294 aout_input_t *p_input;
297 p_input = p_aout->p_input;
298 if( p_input == NULL )
300 aout_unlock( p_aout );
301 msg_Err( p_aout, "no decoder thread" );
305 /* Reinitializes the output */
306 aout_InputDelete( p_aout, p_input );
307 aout_MixerDelete( p_aout );
308 aout_OutputDelete( p_aout );
310 /* FIXME: This function is notoriously dangerous/unsafe.
311 * By the way, if OutputNew or MixerNew fails, we are totally screwed. */
312 if ( aout_OutputNew( p_aout, &p_input->input ) == -1 )
314 /* Release all locks and report the error. */
315 aout_unlock( p_aout );
319 if ( aout_MixerNew( p_aout ) == -1 )
321 aout_OutputDelete( p_aout );
322 aout_unlock( p_aout );
326 if( aout_InputNew( p_aout, p_input, &p_input->request_vout ) )
328 #warning FIXME: deal with errors
329 aout_unlock( p_aout );
332 aout_unlock( p_aout );
336 /*****************************************************************************
337 * aout_ChannelsRestart : change the audio device or channels and restart
338 *****************************************************************************/
339 int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable,
340 vlc_value_t oldval, vlc_value_t newval,
343 aout_instance_t * p_aout = (aout_instance_t *)p_this;
344 (void)oldval; (void)newval; (void)p_data;
346 if ( !strcmp( psz_variable, "audio-device" ) )
348 /* This is supposed to be a significant change and supposes
349 * rebuilding the channel choices. */
350 var_Destroy( p_aout, "audio-channels" );
352 aout_Restart( p_aout );
356 #undef aout_EnableFilter
357 /** Enable or disable an audio filter
358 * \param p_this a vlc object
359 * \param psz_name name of the filter
360 * \param b_add are we adding or removing the filter ?
362 void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name,
365 aout_instance_t *p_aout = findAout( p_this );
367 if( aout_ChangeFilterString( p_this, p_aout, "audio-filter", psz_name, b_add ) )
370 AoutInputsMarkToRestart( p_aout );
374 vlc_object_release( p_aout );