1 /*****************************************************************************
2 * aout.c: audio output controls for the VLC playlist
3 *****************************************************************************
4 * Copyright (C) 2002-2012 VLC authors and VideoLAN
5 *
6 * Authors: Christophe Massiot <massiot@via.ecp.fr>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU Lesser General Public License as published by
10 * the Free Software Foundation; either version 2.1 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public License
19 * along with this program; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
21 *****************************************************************************/
22
23 #ifdef HAVE_CONFIG_H
24 # include "config.h"
25 #endif
26
27 #include <math.h>
28
29 #include <vlc_common.h>
30 #include <vlc_aout.h>
31 #include <vlc_playlist.h>
32
33 #include "../audio_output/aout_internal.h"
34 #include "playlist_internal.h"
35
playlist_GetAout(playlist_t * pl)36 audio_output_t *playlist_GetAout(playlist_t *pl)
37 {
38 /* NOTE: it is assumed that the input resource exists. In practice,
39 * the playlist must have been activated. This is automatic when calling
40 * pl_Get(). FIXME: input resources are deleted at deactivation, this can
41 * be too early. */
42 playlist_private_t *sys = pl_priv(pl);
43 return input_resource_HoldAout(sys->p_input_resource);
44 }
45
playlist_VolumeGet(playlist_t * pl)46 float playlist_VolumeGet (playlist_t *pl)
47 {
48 float volume = -1.f;
49
50 audio_output_t *aout = playlist_GetAout (pl);
51 if (aout != NULL)
52 {
53 volume = aout_VolumeGet (aout);
54 vlc_object_release (aout);
55 }
56 return volume;
57 }
58
playlist_VolumeSet(playlist_t * pl,float vol)59 int playlist_VolumeSet (playlist_t *pl, float vol)
60 {
61 int ret = -1;
62
63 audio_output_t *aout = playlist_GetAout (pl);
64 if (aout != NULL)
65 {
66 ret = aout_VolumeSet (aout, vol);
67 vlc_object_release (aout);
68 }
69 return ret;
70 }
71
72 /**
73 * Raises the volume.
74 * \param value how much to increase (> 0) or decrease (< 0) the volume
75 * \param volp if non-NULL, will contain contain the resulting volume
76 */
playlist_VolumeUp(playlist_t * pl,int value,float * volp)77 int playlist_VolumeUp (playlist_t *pl, int value, float *volp)
78 {
79 int ret = -1;
80
81 audio_output_t *aout = playlist_GetAout (pl);
82 if (aout != NULL)
83 {
84 ret = aout_VolumeUpdate (aout, value, volp);
85 vlc_object_release (aout);
86 }
87 return ret;
88 }
89
playlist_MuteGet(playlist_t * pl)90 int playlist_MuteGet (playlist_t *pl)
91 {
92 int mute = -1;
93
94 audio_output_t *aout = playlist_GetAout (pl);
95 if (aout != NULL)
96 {
97 mute = aout_MuteGet (aout);
98 vlc_object_release (aout);
99 }
100 return mute;
101 }
102
playlist_MuteSet(playlist_t * pl,bool mute)103 int playlist_MuteSet (playlist_t *pl, bool mute)
104 {
105 int ret = -1;
106
107 audio_output_t *aout = playlist_GetAout (pl);
108 if (aout != NULL)
109 {
110 ret = aout_MuteSet (aout, mute);
111 vlc_object_release (aout);
112 }
113 return ret;
114 }
115
playlist_EnableAudioFilter(playlist_t * pl,const char * name,bool add)116 void playlist_EnableAudioFilter (playlist_t *pl, const char *name, bool add)
117 {
118 audio_output_t *aout = playlist_GetAout (pl);
119
120 aout_ChangeFilterString (VLC_OBJECT(pl), aout ? VLC_OBJECT(aout) : NULL,
121 "audio-filter", name, add);
122 if (aout != NULL)
123 vlc_object_release (aout);
124 }
125