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7db7e18bbb
To support internal plugins, add internal _snd_ctl_open_child() function like _snd_pcm_open_slave(). Signed-off-by: Jaroslav Kysela <perex@perex.cz>
126 lines
4.9 KiB
C
126 lines
4.9 KiB
C
/*
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* Control Interface - local header file
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* Copyright (c) 2000 by Jaroslav Kysela <perex@perex.cz>
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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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#include "local.h"
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#include <sound/tlv.h>
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typedef struct _snd_ctl_ops {
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int (*close)(snd_ctl_t *handle);
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int (*nonblock)(snd_ctl_t *handle, int nonblock);
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int (*async)(snd_ctl_t *handle, int sig, pid_t pid);
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int (*subscribe_events)(snd_ctl_t *handle, int subscribe);
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int (*card_info)(snd_ctl_t *handle, snd_ctl_card_info_t *info);
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int (*element_list)(snd_ctl_t *handle, snd_ctl_elem_list_t *list);
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int (*element_info)(snd_ctl_t *handle, snd_ctl_elem_info_t *info);
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int (*element_add)(snd_ctl_t *handle, snd_ctl_elem_info_t *info);
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int (*element_replace)(snd_ctl_t *handle, snd_ctl_elem_info_t *info);
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int (*element_remove)(snd_ctl_t *handle, snd_ctl_elem_id_t *id);
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int (*element_read)(snd_ctl_t *handle, snd_ctl_elem_value_t *control);
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int (*element_write)(snd_ctl_t *handle, snd_ctl_elem_value_t *control);
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int (*element_lock)(snd_ctl_t *handle, snd_ctl_elem_id_t *lock);
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int (*element_unlock)(snd_ctl_t *handle, snd_ctl_elem_id_t *unlock);
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int (*element_tlv)(snd_ctl_t *handle, int op_flag, unsigned int numid,
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unsigned int *tlv, unsigned int tlv_size);
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int (*hwdep_next_device)(snd_ctl_t *handle, int *device);
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int (*hwdep_info)(snd_ctl_t *handle, snd_hwdep_info_t * info);
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int (*pcm_next_device)(snd_ctl_t *handle, int *device);
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int (*pcm_info)(snd_ctl_t *handle, snd_pcm_info_t * info);
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int (*pcm_prefer_subdevice)(snd_ctl_t *handle, int subdev);
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int (*rawmidi_next_device)(snd_ctl_t *handle, int *device);
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int (*rawmidi_info)(snd_ctl_t *handle, snd_rawmidi_info_t * info);
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int (*rawmidi_prefer_subdevice)(snd_ctl_t *handle, int subdev);
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int (*set_power_state)(snd_ctl_t *handle, unsigned int state);
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int (*get_power_state)(snd_ctl_t *handle, unsigned int *state);
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int (*read)(snd_ctl_t *handle, snd_ctl_event_t *event);
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int (*poll_descriptors_count)(snd_ctl_t *handle);
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int (*poll_descriptors)(snd_ctl_t *handle, struct pollfd *pfds, unsigned int space);
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int (*poll_revents)(snd_ctl_t *handle, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
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} snd_ctl_ops_t;
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struct _snd_ctl {
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void *open_func;
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char *name;
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snd_ctl_type_t type;
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const snd_ctl_ops_t *ops;
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void *private_data;
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int nonblock;
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int poll_fd;
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struct list_head async_handlers;
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};
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struct _snd_hctl_elem {
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snd_ctl_elem_id_t id; /* must be always on top */
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struct list_head list; /* links for list of all helems */
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int compare_weight; /* compare weight (reversed) */
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/* event callback */
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snd_hctl_elem_callback_t callback;
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void *callback_private;
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/* links */
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snd_hctl_t *hctl; /* associated handle */
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};
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struct _snd_hctl {
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snd_ctl_t *ctl;
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struct list_head elems; /* list of all controls */
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unsigned int alloc;
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unsigned int count;
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snd_hctl_elem_t **pelems;
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snd_hctl_compare_t compare;
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snd_hctl_callback_t callback;
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void *callback_private;
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};
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/* make local functions really local */
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#define snd_ctl_new snd1_ctl_new
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int snd_ctl_new(snd_ctl_t **ctlp, snd_ctl_type_t type, const char *name);
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int _snd_ctl_poll_descriptor(snd_ctl_t *ctl);
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#define _snd_ctl_async_descriptor _snd_ctl_poll_descriptor
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int snd_ctl_hw_open(snd_ctl_t **handle, const char *name, int card, int mode);
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int snd_ctl_shm_open(snd_ctl_t **handlep, const char *name, const char *sockname, const char *sname, int mode);
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int snd_ctl_async(snd_ctl_t *ctl, int sig, pid_t pid);
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#define CTLINABORT(x) ((x)->nonblock == 2)
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#ifdef INTERNAL
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int INTERNAL(snd_ctl_elem_info_get_dimensions)(const snd_ctl_elem_info_t *obj);
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int INTERNAL(snd_ctl_elem_info_get_dimension)(const snd_ctl_elem_info_t *obj, unsigned int idx);
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#endif /* INTERNAL */
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int _snd_ctl_open_named_child(snd_ctl_t **pctl, const char *name,
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snd_config_t *root, snd_config_t *conf,
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int mode, snd_config_t *parent_conf);
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static inline int
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_snd_ctl_open_child(snd_ctl_t **pctl, snd_config_t *root,
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snd_config_t *conf, int mode, snd_config_t *parent_conf)
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{
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return _snd_ctl_open_named_child(pctl, NULL, root, conf, mode, parent_conf);
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}
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int __snd_ctl_add_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,
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unsigned int element_count,
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unsigned int member_count);
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int __snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst,
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const char *str,
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const char **ret_ptr);
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