aboutsummaryrefslogtreecommitdiff
path: root/include/sound/control.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/sound/control.h')
-rw-r--r--include/sound/control.h162
1 files changed, 162 insertions, 0 deletions
diff --git a/include/sound/control.h b/include/sound/control.h
new file mode 100644
index 00000000000..7b9444cd02f
--- /dev/null
+++ b/include/sound/control.h
@@ -0,0 +1,162 @@
+#ifndef __SOUND_CONTROL_H
+#define __SOUND_CONTROL_H
+
+/*
+ * Header file for control interface
+ * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <sound/asound.h>
+
+typedef struct sndrv_aes_iec958 snd_aes_iec958_t;
+typedef struct sndrv_ctl_card_info snd_ctl_card_info_t;
+typedef enum sndrv_ctl_elem_type snd_ctl_elem_type_t;
+typedef enum sndrv_ctl_elem_iface snd_ctl_elem_iface_t;
+typedef struct sndrv_ctl_elem_id snd_ctl_elem_id_t;
+typedef struct sndrv_ctl_elem_list snd_ctl_elem_list_t;
+typedef struct sndrv_ctl_elem_info snd_ctl_elem_info_t;
+typedef struct sndrv_ctl_elem_value snd_ctl_elem_value_t;
+typedef enum sndrv_ctl_event_type snd_ctl_event_type_t;
+typedef struct sndrv_ctl_event snd_ctl_event_t;
+
+#define snd_kcontrol_chip(kcontrol) ((kcontrol)->private_data)
+
+typedef int (snd_kcontrol_info_t) (snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo);
+typedef int (snd_kcontrol_get_t) (snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol);
+typedef int (snd_kcontrol_put_t) (snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol);
+
+typedef struct _snd_kcontrol_new {
+ snd_ctl_elem_iface_t iface; /* interface identifier */
+ unsigned int device; /* device/client number */
+ unsigned int subdevice; /* subdevice (substream) number */
+ unsigned char *name; /* ASCII name of item */
+ unsigned int index; /* index of item */
+ unsigned int access; /* access rights */
+ unsigned int count; /* count of same elements */
+ snd_kcontrol_info_t *info;
+ snd_kcontrol_get_t *get;
+ snd_kcontrol_put_t *put;
+ unsigned long private_value;
+} snd_kcontrol_new_t;
+
+typedef struct _snd_kcontrol_volatile {
+ snd_ctl_file_t *owner; /* locked */
+ pid_t owner_pid;
+ unsigned int access; /* access rights */
+} snd_kcontrol_volatile_t;
+
+struct _snd_kcontrol {
+ struct list_head list; /* list of controls */
+ snd_ctl_elem_id_t id;
+ unsigned int count; /* count of same elements */
+ snd_kcontrol_info_t *info;
+ snd_kcontrol_get_t *get;
+ snd_kcontrol_put_t *put;
+ unsigned long private_value;
+ void *private_data;
+ void (*private_free)(snd_kcontrol_t *kcontrol);
+ snd_kcontrol_volatile_t vd[0]; /* volatile data */
+};
+
+#define snd_kcontrol(n) list_entry(n, snd_kcontrol_t, list)
+
+typedef struct _snd_kctl_event {
+ struct list_head list; /* list of events */
+ snd_ctl_elem_id_t id;
+ unsigned int mask;
+} snd_kctl_event_t;
+
+#define snd_kctl_event(n) list_entry(n, snd_kctl_event_t, list)
+
+struct _snd_ctl_file {
+ struct list_head list; /* list of all control files */
+ snd_card_t *card;
+ pid_t pid;
+ int prefer_pcm_subdevice;
+ int prefer_rawmidi_subdevice;
+ wait_queue_head_t change_sleep;
+ spinlock_t read_lock;
+ struct fasync_struct *fasync;
+ int subscribed; /* read interface is activated */
+ struct list_head events; /* waiting events for read */
+};
+
+#define snd_ctl_file(n) list_entry(n, snd_ctl_file_t, list)
+
+typedef int (*snd_kctl_ioctl_func_t) (snd_card_t * card,
+ snd_ctl_file_t * control,
+ unsigned int cmd, unsigned long arg);
+
+void snd_ctl_notify(snd_card_t * card, unsigned int mask, snd_ctl_elem_id_t * id);
+
+snd_kcontrol_t *snd_ctl_new(snd_kcontrol_t * kcontrol, unsigned int access);
+snd_kcontrol_t *snd_ctl_new1(snd_kcontrol_new_t * kcontrolnew, void * private_data);
+void snd_ctl_free_one(snd_kcontrol_t * kcontrol);
+int snd_ctl_add(snd_card_t * card, snd_kcontrol_t * kcontrol);
+int snd_ctl_remove(snd_card_t * card, snd_kcontrol_t * kcontrol);
+int snd_ctl_remove_id(snd_card_t * card, snd_ctl_elem_id_t *id);
+int snd_ctl_rename_id(snd_card_t * card, snd_ctl_elem_id_t *src_id, snd_ctl_elem_id_t *dst_id);
+snd_kcontrol_t *snd_ctl_find_numid(snd_card_t * card, unsigned int numid);
+snd_kcontrol_t *snd_ctl_find_id(snd_card_t * card, snd_ctl_elem_id_t *id);
+
+int snd_ctl_create(snd_card_t *card);
+
+int snd_ctl_register_ioctl(snd_kctl_ioctl_func_t fcn);
+int snd_ctl_unregister_ioctl(snd_kctl_ioctl_func_t fcn);
+#ifdef CONFIG_COMPAT
+int snd_ctl_register_ioctl_compat(snd_kctl_ioctl_func_t fcn);
+int snd_ctl_unregister_ioctl_compat(snd_kctl_ioctl_func_t fcn);
+#else
+#define snd_ctl_register_ioctl_compat(fcn)
+#define snd_ctl_unregister_ioctl_compat(fcn)
+#endif
+
+int snd_ctl_elem_read(snd_card_t *card, snd_ctl_elem_value_t *control);
+int snd_ctl_elem_write(snd_card_t *card, snd_ctl_file_t *file, snd_ctl_elem_value_t *control);
+
+static inline unsigned int snd_ctl_get_ioffnum(snd_kcontrol_t *kctl, snd_ctl_elem_id_t *id)
+{
+ return id->numid - kctl->id.numid;
+}
+
+static inline unsigned int snd_ctl_get_ioffidx(snd_kcontrol_t *kctl, snd_ctl_elem_id_t *id)
+{
+ return id->index - kctl->id.index;
+}
+
+static inline unsigned int snd_ctl_get_ioff(snd_kcontrol_t *kctl, snd_ctl_elem_id_t *id)
+{
+ if (id->numid) {
+ return snd_ctl_get_ioffnum(kctl, id);
+ } else {
+ return snd_ctl_get_ioffidx(kctl, id);
+ }
+}
+
+static inline snd_ctl_elem_id_t *snd_ctl_build_ioff(snd_ctl_elem_id_t *dst_id,
+ snd_kcontrol_t *src_kctl,
+ unsigned int offset)
+{
+ *dst_id = src_kctl->id;
+ dst_id->index += offset;
+ dst_id->numid += offset;
+ return dst_id;
+}
+
+#endif /* __SOUND_CONTROL_H */