mirror of
https://gitee.com/openharmony/third_party_alsa-lib
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113 lines
4.1 KiB
C
113 lines
4.1 KiB
C
/**
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* \file include/mixer_abst.h
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* \brief Mixer abstract implementation interface library for the ALSA library
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* \author Jaroslav Kysela <perex@perex.cz>
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* \date 2005
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*
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* Mixer abstact implementation interface library for the ALSA library
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*/
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/*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef __ALSA_MIXER_ABST_H
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#define __ALSA_MIXER_ABST_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \defgroup Mixer_Abstract Mixer Abstact Module Interface
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* The mixer abstact module interface.
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* \{
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*/
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#define SM_PLAY 0
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#define SM_CAPT 1
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#define SM_CAP_GVOLUME (1<<1)
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#define SM_CAP_GSWITCH (1<<2)
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#define SM_CAP_PVOLUME (1<<3)
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#define SM_CAP_PVOLUME_JOIN (1<<4)
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#define SM_CAP_PSWITCH (1<<5)
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#define SM_CAP_PSWITCH_JOIN (1<<6)
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#define SM_CAP_CVOLUME (1<<7)
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#define SM_CAP_CVOLUME_JOIN (1<<8)
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#define SM_CAP_CSWITCH (1<<9)
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#define SM_CAP_CSWITCH_JOIN (1<<10)
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#define SM_CAP_CSWITCH_EXCL (1<<11)
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#define SM_CAP_PENUM (1<<12)
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#define SM_CAP_CENUM (1<<13)
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/* SM_CAP_* 24-31 => private for module use */
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#define SM_OPS_IS_ACTIVE 0
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#define SM_OPS_IS_MONO 1
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#define SM_OPS_IS_CHANNEL 2
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#define SM_OPS_IS_ENUMERATED 3
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#define SM_OPS_IS_ENUMCNT 4
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#define sm_selem(x) ((sm_selem_t *)((x)->private_data))
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#define sm_selem_ops(x) ((sm_selem_t *)((x)->private_data))->ops
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typedef struct _sm_selem {
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snd_mixer_selem_id_t *id;
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struct sm_elem_ops *ops;
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unsigned int caps;
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unsigned int capture_group;
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} sm_selem_t;
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typedef struct _sm_class_basic {
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char *device;
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snd_ctl_t *ctl;
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snd_hctl_t *hctl;
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snd_ctl_card_info_t *info;
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} sm_class_basic_t;
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struct sm_elem_ops {
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int (*is)(snd_mixer_elem_t *elem, int dir, int cmd, int val);
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int (*get_range)(snd_mixer_elem_t *elem, int dir, long *min, long *max);
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int (*set_range)(snd_mixer_elem_t *elem, int dir, long min, long max);
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int (*get_dB_range)(snd_mixer_elem_t *elem, int dir, long *min, long *max);
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int (*ask_vol_dB)(snd_mixer_elem_t *elem, int dir, long value, long *dbValue);
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int (*ask_dB_vol)(snd_mixer_elem_t *elem, int dir, long dbValue, long *value, int xdir);
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int (*get_volume)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, long *value);
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int (*get_dB)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, long *value);
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int (*set_volume)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, long value);
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int (*set_dB)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, long value, int xdir);
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int (*get_switch)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, int *value);
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int (*set_switch)(snd_mixer_elem_t *elem, int dir, snd_mixer_selem_channel_id_t channel, int value);
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int (*enum_item_name)(snd_mixer_elem_t *elem, unsigned int item, size_t maxlen, char *buf);
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int (*get_enum_item)(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, unsigned int *itemp);
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int (*set_enum_item)(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, unsigned int item);
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};
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int snd_mixer_selem_compare(const snd_mixer_elem_t *c1, const snd_mixer_elem_t *c2);
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int snd_mixer_sbasic_info(const snd_mixer_class_t *class, sm_class_basic_t *info);
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void *snd_mixer_sbasic_get_private(const snd_mixer_class_t *class);
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void snd_mixer_sbasic_set_private(const snd_mixer_class_t *class, void *private_data);
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void snd_mixer_sbasic_set_private_free(const snd_mixer_class_t *class, void (*private_free)(snd_mixer_class_t *class));
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/** \} */
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ALSA_MIXER_ABST_H */
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