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Member "alsa-lib-1.1.9/modules/mixer/simple/ac97.c" (10 May 2019, 2335 Bytes) of package /linux/misc/alsa-lib-1.1.9.tar.bz2:


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    1 /*
    2  *  Mixer Interface - AC97 simple abstact module
    3  *  Copyright (c) 2005 by Jaroslav Kysela <perex@perex.cz>
    4  *
    5  *
    6  *   This library is free software; you can redistribute it and/or modify
    7  *   it under the terms of the GNU Lesser General Public License as
    8  *   published by the Free Software Foundation; either version 2.1 of
    9  *   the License, or (at your option) any later version.
   10  *
   11  *   This program is distributed in the hope that it will be useful,
   12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   14  *   GNU Lesser General Public License for more details.
   15  *
   16  *   You should have received a copy of the GNU Lesser General Public
   17  *   License along with this library; if not, write to the Free Software
   18  *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
   19  *
   20  */
   21 
   22 #include <stdio.h>
   23 #include <stdlib.h>
   24 #include <unistd.h>
   25 #include <string.h>
   26 #include <fcntl.h>
   27 #include <sys/ioctl.h>
   28 #include <math.h>
   29 #include "asoundlib.h"
   30 #include "mixer_abst.h"
   31 #include "sbase.h"
   32 
   33 static struct sm_elem_ops simple_ac97_ops;
   34 
   35 struct melem_sids sids[] = {
   36     {
   37         .sid    = SID_MASTER,
   38         .sname  = "Master",
   39         .sindex = 0,
   40         .weight = 1,
   41         .chanmap = { 3, 0 },
   42         .sops = &simple_ac97_ops,
   43     }
   44 };
   45 
   46 #define SELECTORS (sizeof(selectors)/sizeof(selectors[0]))
   47 
   48 struct helem_selector selectors[] = {
   49     {
   50         .iface =    SND_CTL_ELEM_IFACE_MIXER,
   51         .name =     "Master Playback Volume",
   52         .index =    0,
   53         .sid =      SID_MASTER,
   54         .purpose =  PURPOSE_VOLUME,
   55         .caps =     SM_CAP_PVOLUME,
   56     },
   57     {
   58         .iface =    SND_CTL_ELEM_IFACE_MIXER,
   59         .name =     "Master Playback Switch",
   60         .index =    0,
   61         .sid =      SID_MASTER,
   62         .purpose =  PURPOSE_SWITCH,
   63         .caps =     SM_CAP_PSWITCH,
   64     }
   65 };
   66 
   67 int alsa_mixer_simple_event(snd_mixer_class_t *class, unsigned int mask,
   68                 snd_hctl_elem_t *helem, snd_mixer_elem_t *melem)
   69 {
   70     struct bclass_private *priv = snd_mixer_sbasic_get_private(class);
   71     return priv->ops.event(class, mask, helem, melem);
   72 }
   73 
   74 int alsa_mixer_simple_init(snd_mixer_class_t *class)
   75 {
   76     struct bclass_base_ops *ops;
   77     int err;
   78     
   79     err = mixer_simple_basic_dlopen(class, &ops);
   80     if (err < 0)
   81         return 0;
   82     err = ops->selreg(class, selectors, SELECTORS);
   83     if (err < 0)
   84         return err;
   85     err = ops->sidreg(class, sids, SELECTORS);
   86     if (err < 0)
   87         return err;
   88     return 0;
   89 }