alsa-lib/src/ucm/ucm_local.h

/*
 *  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 of the License, or (at your option) any later version.
 *
 *  This library 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
 *
 *  Support for the verb/device/modifier core logic and API,
 *  command line tool and file parser was kindly sponsored by
 *  Texas Instruments Inc.
 *  Support for multiple active modifiers and devices,
 *  transition sequences, multiple client access and user defined use
 *  cases was kindly sponsored by Wolfson Microelectronics PLC.
 *
 *  Copyright (C) 2008-2010 SlimLogic Ltd
 *  Copyright (C) 2010 Wolfson Microelectronics PLC
 *  Copyright (C) 2010 Texas Instruments Inc.
 *  Copyright (C) 2010 Red Hat Inc.
 *  Authors: Liam Girdwood <lrg@slimlogic.co.uk>
 *	         Stefan Schmidt <stefan@slimlogic.co.uk>
 *	         Justin Xu <justinx@slimlogic.co.uk>
 *               Jaroslav Kysela <perex@perex.cz>
 */



#if 0
#define UC_MGR_DEBUG
#endif

#include <pthread.h>
#include "local.h"
#include "use-case.h"

#define MAX_FILE		256
#define ALSA_USE_CASE_DIR	ALSA_CONFIG_DIR "/ucm"

#define SEQUENCE_ELEMENT_TYPE_CDEV	1
#define SEQUENCE_ELEMENT_TYPE_CSET	2
#define SEQUENCE_ELEMENT_TYPE_SLEEP	3
#define SEQUENCE_ELEMENT_TYPE_EXEC	4

struct ucm_value {
        struct list_head list;
        char *name;
        char *data;
};

struct sequence_element {
	struct list_head list;
	unsigned int type;
	union {
		long sleep; /* Sleep time in microseconds if sleep element, else 0 */
		char *cdev;
		char *cset;
		char *exec;
	} data;
};

/*
 * Transition sequences. i.e. transition between one verb, device, mod to another
 */
struct transition_sequence {
	struct list_head list;
	char *name;
	struct list_head transition_list;
};

/*
 * Modifier Supported Devices.
 */
enum dev_list_type {
	DEVLIST_NONE,
	DEVLIST_SUPPORTED,
	DEVLIST_CONFLICTING
};

struct dev_list_node {
	struct list_head list;
	char *name;
};

struct dev_list {
	enum dev_list_type type;
	struct list_head list;
};

/*
 * Describes a Use Case Modifier and it's enable and disable sequences.
 * A use case verb can have N modifiers.
 */
struct use_case_modifier {
	struct list_head list;
	struct list_head active_list;

	char *name;
	char *comment;

	/* modifier enable and disable sequences */
	struct list_head enable_list;
	struct list_head disable_list;

	/* modifier transition list */
	struct list_head transition_list;

	/* list of devices supported or conflicting */
	struct dev_list dev_list;

	/* values */
	struct list_head value_list;
};

/*
 * Describes a Use Case Device and it's enable and disable sequences.
 * A use case verb can have N devices.
 */
struct use_case_device {
	struct list_head list;
	struct list_head active_list;

	char *name;
	char *comment;

	/* device enable and disable sequences */
	struct list_head enable_list;
	struct list_head disable_list;

	/* device transition list */
	struct list_head transition_list;

	/* list of devices supported or conflicting */
	struct dev_list dev_list;

	/* value list */
	struct list_head value_list;
};

/*
 * Describes a Use Case Verb and it's enable and disable sequences.
 * A use case verb can have N devices and N modifiers.
 */
struct use_case_verb {
	struct list_head list;

	unsigned int active: 1;

	char *name;
	char *comment;

	/* verb enable and disable sequences */
	struct list_head enable_list;
	struct list_head disable_list;

	/* verb transition list */
	struct list_head transition_list;

	/* hardware devices that can be used with this use case */
	struct list_head device_list;

	/* modifiers that can be used with this use case */
	struct list_head modifier_list;

	/* value list */
	struct list_head value_list;
};

/*
 *  Manages a sound card and all its use cases.
 */
struct snd_use_case_mgr {
	char *card_name;
	char *comment;

	/* use case verb, devices and modifier configs parsed from files */
	struct list_head verb_list;

	/* default settings - sequence */
	struct list_head default_list;

	/* default settings - value list */
	struct list_head value_list;

	/* current status */
	struct use_case_verb *active_verb;
	struct list_head active_devices;
	struct list_head active_modifiers;

	/* locking */
	pthread_mutex_t mutex;

	/* change to list of ctl handles */
	snd_ctl_t *ctl;
	char *ctl_dev;
};

#define uc_error SNDERR

#ifdef UC_MGR_DEBUG
#define uc_dbg SNDERR
#else
#define uc_dbg(fmt, arg...) do { } while (0)
#endif

void uc_mgr_error(const char *fmt, ...);
void uc_mgr_stdout(const char *fmt, ...);

int uc_mgr_config_load(const char *file, snd_config_t **cfg);
int uc_mgr_import_master_config(snd_use_case_mgr_t *uc_mgr);
int uc_mgr_scan_master_configs(const char **_list[]);

void uc_mgr_free_sequence_element(struct sequence_element *seq);
void uc_mgr_free_transition_element(struct transition_sequence *seq);
void uc_mgr_free_verb(snd_use_case_mgr_t *uc_mgr);
void uc_mgr_free(snd_use_case_mgr_t *uc_mgr);