sbase.h

/*
 *  Mixer Interface - simple abstact module - base library
 *  Copyright (c) 2005 by Jaroslav Kysela <perex@suse.cz>
 *
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as
 *   published by the Free Software Foundation; either version 2.1 of
 *   the License, or (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#ifndef __SMIXER_BASE_H

#include "list.h"

#define MAX_CHANNEL     6

#define SID_MASTER      0
#define SID_HEADPHONE   1
#define SID_FRONT       2
#define SID_PCM         3
#define SID_CD          4

struct melem_sids {
        unsigned short sid;
        const char *sname;
        unsigned short sindex;
        unsigned short weight;
        unsigned int chanmap[2];
        struct sm_elem_ops *sops;
};

#define PURPOSE_VOLUME          0
#define PURPOSE_SWITCH          1
#define PURPOSE_ENUMLIST        2

struct helem_selector {
        snd_ctl_elem_iface_t iface;
        const char *name;
        unsigned short index;
        unsigned short sid;
        unsigned short purpose;
        unsigned short caps;
};

struct helem_base {
        struct list_head list;
        snd_hctl_elem_t *helem;
        unsigned short purpose;
        unsigned int caps;
        unsigned int inactive: 1;
        long min, max;
        unsigned int count;
};

struct selem_base {
        sm_selem_t selem;
        struct list_head helems;
        unsigned short sid;
        struct {
                unsigned int chanmap;
                unsigned int forced_range: 1;
                long min, max;
                long vol[MAX_CHANNEL];
        } dir[2];
};

struct bclass_selector {
        struct list_head list;
        struct helem_selector *selectors;
        unsigned int count;
};

struct bclass_sid {
        struct list_head list;
        struct melem_sids *sids;
        unsigned int count;
};

typedef struct bclass_base_ops {
        int (*event)(snd_mixer_class_t *class, unsigned int mask,
                     snd_hctl_elem_t *helem, snd_mixer_elem_t *melem);
        int (*selreg)(snd_mixer_class_t *class,
                      struct helem_selector *selectors,
                      unsigned int count);
        int (*sidreg)(snd_mixer_class_t *class,
                      struct melem_sids *sids,
                      unsigned int count);
} bclass_base_ops_t;

struct bclass_private {
        struct list_head selectors;
        struct list_head sids;
        void *dl_sbase;
        bclass_base_ops_t ops;
};

int mixer_simple_basic_dlopen(snd_mixer_class_t *class,
                              bclass_base_ops_t **ops);

#endif /* __SMIXER_BASE_H */

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