src/playlist/aout.c

   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 <vlc_common.h>
  28 #include <vlc_aout.h>
  29 #include <vlc_playlist.h>
  30
  31 #include "../audio_output/aout_internal.h"
  32 #include "playlist_internal.h"
  33
  34 audio_output_t *playlist_GetAout(playlist_t *pl)
  35 {
  36     /* NOTE: it is assumed that the input resource exists. In practice,
  37      * the playlist must have been activated. This is automatic when calling
  38      * pl_Get(). FIXME: input resources are deleted at deactivation, this can
  39      * be too early. */
  40     playlist_private_t *sys = pl_priv(pl);
  41     return input_resource_HoldAout(sys->p_input_resource);
  42 }
  43
  44 float playlist_VolumeGet (playlist_t *pl)
  45 {
  46     float volume = -1.f;
  47
  48     audio_output_t *aout = playlist_GetAout (pl);
  49     if (aout != NULL)
  50     {
  51         volume = aout_VolumeGet (aout);
  52         vlc_object_release (aout);
  53     }
  54     return volume;
  55 }
  56
  57 int playlist_VolumeSet (playlist_t *pl, float vol)
  58 {
  59     int ret = -1;
  60
  61     audio_output_t *aout = playlist_GetAout (pl);
  62     if (aout != NULL)
  63     {
  64         ret = aout_VolumeSet (aout, vol);
  65         vlc_object_release (aout);
  66     }
  67     return ret;
  68 }
  69
  70 /**
  71  * Raises the volume.
  72  * \param value how much to increase (> 0) or decrease (< 0) the volume
  73  * \param volp if non-NULL, will contain contain the resulting volume
  74  */
  75 int playlist_VolumeUp (playlist_t *pl, int value, float *volp)
  76 {
  77     int ret = -1;
  78
  79     value *= var_InheritInteger (pl, "volume-step");
  80
  81     audio_output_t *aout = playlist_GetAout (pl);
  82     if (aout != NULL)
  83     {
  84         float vol = aout_VolumeGet (aout);
  85         if (vol >= 0.)
  86         {
  87             vol += value / (float)AOUT_VOLUME_DEFAULT;
  88             if (vol < 0.)
  89                 vol = 0.;
  90             if (vol > 2.)
  91                 vol = 2.;
  92             if (volp != NULL)
  93                 *volp = vol;
  94             ret = aout_VolumeSet (aout, vol);
  95         }
  96         vlc_object_release (aout);
  97     }
  98     return ret;
  99 }
 100
 101 int playlist_MuteGet (playlist_t *pl)
 102 {
 103     int mute = -1;
 104
 105     audio_output_t *aout = playlist_GetAout (pl);
 106     if (aout != NULL)
 107     {
 108         mute = aout_MuteGet (aout);
 109         vlc_object_release (aout);
 110     }
 111     return mute;
 112 }
 113
 114 int playlist_MuteSet (playlist_t *pl, bool mute)
 115 {
 116     int ret = -1;
 117
 118     audio_output_t *aout = playlist_GetAout (pl);
 119     if (aout != NULL)
 120     {
 121         ret = aout_MuteSet (aout, mute);
 122         vlc_object_release (aout);
 123     }
 124     return ret;
 125 }
 126
 127 void playlist_EnableAudioFilter (playlist_t *pl, const char *name, bool add)
 128 {
 129     audio_output_t *aout = playlist_GetAout (pl);
 130
 131     if (aout_ChangeFilterString (VLC_OBJECT(pl), VLC_OBJECT(aout),
 132                                  "audio-filter", name, add))
 133     {
 134         if (aout != NULL)
 135             aout_InputRequestRestart (aout);
 136     }
 137     if (aout != NULL)
 138         vlc_object_release (aout);
 139 }