external/alsa-lib 1.0.16

1 files changed, 943 insertions, 0 deletions

diff --git a/src/alisp/alisp_snd.c b/src/alisp/alisp_snd.c
new file mode 100644
index 0000000..147ed0a
--- /dev/null
+++ b/src/alisp/alisp_snd.c
@@ -0,0 +1,943 @@
+/*
+ *  ALSA lisp implementation - sound related commands
+ *  Copyright (c) 2003 by Jaroslav Kysela <perex@perex.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
+ *
+ */
+
+struct acall_table {
+	const char *name;
+	struct alisp_object * (*func) (struct alisp_instance *instance, struct acall_table * item, struct alisp_object * args);
+	void * xfunc;
+	const char *prefix;
+};
+
+/*
+ *  helper functions
+ */
+
+static inline int get_integer(struct alisp_object * obj)
+{
+	if (alisp_compare_type(obj, ALISP_OBJ_INTEGER))
+		return obj->value.i;
+	return 0;
+}
+
+static inline const void *get_pointer(struct alisp_object * obj)
+{
+	if (alisp_compare_type(obj, ALISP_OBJ_POINTER))
+		return obj->value.ptr;
+	return NULL;
+}
+
+static const char *get_string(struct alisp_object * obj, const char * deflt)
+{
+	if (obj == &alsa_lisp_t)
+		return "true";
+	if (alisp_compare_type(obj, ALISP_OBJ_STRING) ||
+	    alisp_compare_type(obj, ALISP_OBJ_IDENTIFIER))
+		return obj->value.s;
+	return deflt;
+}
+
+struct flags {
+	const char *key;
+	unsigned int mask;
+}; 
+
+static unsigned int get_flags(struct alisp_instance * instance,
+			      struct alisp_object * obj,
+			      const struct flags * flags,
+			      unsigned int deflt)
+{
+	const char *key;
+	int invert;
+	unsigned int result;
+	const struct flags *ptr;
+	struct alisp_object *n;
+
+	if (obj == &alsa_lisp_nil)
+		return deflt;
+	result = deflt;
+	do {
+		key = get_string(obj, NULL);
+		if (key) {
+			invert = key[0] == '!';
+			key += invert;
+			ptr = flags;
+			while (ptr->key) {
+				if (!strcmp(ptr->key, key)) {
+					if (invert)
+						result &= ~ptr->mask;
+					else
+						result |= ptr->mask;
+					break;
+				}
+				ptr++;
+			}
+		}
+		delete_tree(instance, car(obj));
+		obj = cdr(n = obj);
+		delete_object(instance, n);
+	} while (obj != &alsa_lisp_nil);
+	return result;
+}
+
+static const void *get_ptr(struct alisp_instance * instance,
+			   struct alisp_object * obj,
+			   const char *_ptr_id)
+{
+	const char *ptr_id;
+	const void *ptr;
+	
+	ptr_id = get_string(car(obj), NULL);
+	if (ptr_id == NULL) {
+		delete_tree(instance, obj);
+		return NULL;
+	}
+	if (strcmp(ptr_id, _ptr_id)) {
+		delete_tree(instance, obj);
+		return NULL;
+	}
+	ptr = get_pointer(cdr(obj));
+	delete_tree(instance, obj);
+	return ptr;
+}
+
+static struct alisp_object * new_lexpr(struct alisp_instance * instance, int err)
+{
+	struct alisp_object * lexpr;
+
+	lexpr = new_object(instance, ALISP_OBJ_CONS);
+	if (lexpr == NULL)
+		return NULL;
+	lexpr->value.c.car = new_integer(instance, err);
+	if (lexpr->value.c.car == NULL) {
+		delete_object(instance, lexpr);
+		return NULL;
+	}
+	lexpr->value.c.cdr = new_object(instance, ALISP_OBJ_CONS);
+	if (lexpr->value.c.cdr == NULL) {
+		delete_object(instance, lexpr->value.c.car);
+		delete_object(instance, lexpr);
+		return NULL;
+	}
+	return lexpr;
+}
+
+static struct alisp_object * add_cons(struct alisp_instance * instance,
+				      struct alisp_object *lexpr,
+				      int cdr, const char *id,
+				      struct alisp_object *obj)
+{
+	struct alisp_object * p1, * p2;
+
+	if (lexpr == NULL || obj == NULL) {
+		delete_tree(instance, obj);
+		return NULL;
+	}
+	if (cdr) {
+		p1 = lexpr->value.c.cdr = new_object(instance, ALISP_OBJ_CONS);
+	} else {
+		p1 = lexpr->value.c.car = new_object(instance, ALISP_OBJ_CONS);
+	}
+	lexpr = p1;
+	if (p1 == NULL) {
+		delete_tree(instance, obj);
+		return NULL;
+	}
+	p1->value.c.car = new_object(instance, ALISP_OBJ_CONS);
+	if ((p2 = p1->value.c.car) == NULL)
+		goto __err;
+	p2->value.c.car = new_string(instance, id);
+	if (p2->value.c.car == NULL) {
+	      __err:
+		if (cdr)
+			lexpr->value.c.cdr = NULL;
+		else
+			lexpr->value.c.car = NULL;
+		delete_tree(instance, p1);
+		delete_tree(instance, obj);
+		return NULL;
+	}
+	p2->value.c.cdr = obj;
+	return lexpr;
+}
+
+static struct alisp_object * add_cons2(struct alisp_instance * instance,
+				       struct alisp_object *lexpr,
+				       int cdr, struct alisp_object *obj)
+{
+	struct alisp_object * p1;
+
+	if (lexpr == NULL || obj == NULL) {
+		delete_tree(instance, obj);
+		return NULL;
+	}
+	if (cdr) {
+		p1 = lexpr->value.c.cdr = new_object(instance, ALISP_OBJ_CONS);
+	} else {
+		p1 = lexpr->value.c.car = new_object(instance, ALISP_OBJ_CONS);
+	}
+	lexpr = p1;
+	if (p1 == NULL) {
+		delete_tree(instance, obj);
+		return NULL;
+	}
+	p1->value.c.car = obj;
+	return lexpr;
+}
+
+static struct alisp_object * new_result1(struct alisp_instance * instance,
+					 int err, const char *ptr_id, void *ptr)
+{
+	struct alisp_object * lexpr, * p1;
+
+	if (err < 0)
+		ptr = NULL;
+	lexpr = new_object(instance, ALISP_OBJ_CONS);
+	if (lexpr == NULL)
+		return NULL;
+	lexpr->value.c.car = new_integer(instance, err);
+	if (lexpr->value.c.car == NULL) {
+		delete_object(instance, lexpr);
+		return NULL;
+	}
+	p1 = add_cons(instance, lexpr, 1, ptr_id, new_pointer(instance, ptr));
+	if (p1 == NULL) {
+		delete_object(instance, lexpr);
+		return NULL;
+	}
+	return lexpr;
+}
+
+static struct alisp_object * new_result2(struct alisp_instance * instance,
+					 int err, int val)
+{
+	struct alisp_object * lexpr, * p1;
+
+	if (err < 0)
+		val = 0;
+	lexpr = new_lexpr(instance, err);
+	if (lexpr == NULL)
+		return NULL;
+	p1 = lexpr->value.c.cdr;
+	p1->value.c.car = new_integer(instance, val);
+	if (p1->value.c.car == NULL) {
+		delete_object(instance, lexpr);
+		return NULL;
+	}
+	return lexpr;
+}
+
+static struct alisp_object * new_result3(struct alisp_instance * instance,
+					 int err, const char *str)
+{
+	struct alisp_object * lexpr, * p1;
+
+	if (err < 0)
+		str = "";
+	lexpr = new_lexpr(instance, err);
+	if (lexpr == NULL)
+		return NULL;
+	p1 = lexpr->value.c.cdr;
+	p1->value.c.car = new_string(instance, str);
+	if (p1->value.c.car == NULL) {
+		delete_object(instance, lexpr);
+		return NULL;
+	}
+	return lexpr;
+}
+
+/*
+ *  macros
+ */
+
+/*
+ *  HCTL functions
+ */
+
+typedef int (*snd_int_pp_strp_int_t)(void **rctl, const char *name, int mode);
+typedef int (*snd_int_pp_p_t)(void **rctl, void *handle);
+typedef int (*snd_int_p_t)(void *rctl);
+typedef char * (*snd_str_p_t)(void *rctl);
+typedef int (*snd_int_intp_t)(int *val);
+typedef int (*snd_int_str_t)(const char *str);
+typedef int (*snd_int_int_strp_t)(int val, char **str);
+typedef void *(*snd_p_p_t)(void *handle);
+
+static struct alisp_object * FA_int_pp_strp_int(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	const char *name;
+	int err, mode;
+	void *handle;
+	struct alisp_object *p1, *p2;
+	static struct flags flags[] = {
+		{ "nonblock", SND_CTL_NONBLOCK },
+		{ "async", SND_CTL_ASYNC },
+		{ "readonly", SND_CTL_READONLY },
+		{ NULL, 0 }
+	};
+
+	name = get_string(p1 = eval(instance, car(args)), NULL);
+	if (name == NULL)
+		return &alsa_lisp_nil;
+	mode = get_flags(instance, p2 = eval(instance, car(cdr(args))), flags, 0);
+	delete_tree(instance, cdr(cdr(args)));
+	delete_object(instance, cdr(args));
+	delete_object(instance, args);
+	delete_tree(instance, p2);
+	err = ((snd_int_pp_strp_int_t)item->xfunc)(&handle, name, mode);
+	delete_tree(instance, p1);
+	return new_result1(instance, err, item->prefix, handle);
+}
+
+static struct alisp_object * FA_int_pp_p(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	int err;
+	void *handle;
+	const char *prefix1;
+	struct alisp_object *p1;
+
+	if (item->xfunc == &snd_hctl_open_ctl)
+		prefix1 = "ctl";
+	else {
+		delete_tree(instance, args);
+		return &alsa_lisp_nil;
+	}
+	p1 = eval(instance, car(args));
+	delete_tree(instance, cdr(args));
+	delete_object(instance, args);
+	handle = (void *)get_ptr(instance, p1, prefix1);
+	if (handle == NULL)
+		return &alsa_lisp_nil;
+	err = ((snd_int_pp_p_t)item->xfunc)(&handle, handle);
+	return new_result1(instance, err, item->prefix, handle);
+}
+
+static struct alisp_object * FA_p_p(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	void *handle;
+	const char *prefix1;
+	struct alisp_object * p1;
+
+	if (item->xfunc == &snd_hctl_first_elem ||
+	    item->xfunc == &snd_hctl_last_elem ||
+	    item->xfunc == &snd_hctl_elem_next ||
+	    item->xfunc == &snd_hctl_elem_prev)
+		prefix1 = "hctl_elem";
+	else if (item->xfunc == &snd_hctl_ctl)
+		prefix1 = "ctl";
+	else {
+		delete_tree(instance, args);
+		return &alsa_lisp_nil;
+	}
+	p1 = eval(instance, car(args));
+	delete_tree(instance, cdr(args));
+	delete_object(instance, args);
+	handle = (void *)get_ptr(instance, p1, item->prefix);
+	if (handle == NULL)
+		return &alsa_lisp_nil;
+	handle = ((snd_p_p_t)item->xfunc)(handle);
+	return new_cons_pointer(instance, prefix1, handle);
+}
+
+static struct alisp_object * FA_int_p(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	void *handle;
+	struct alisp_object * p1;
+
+	p1 = eval(instance, car(args));
+	delete_tree(instance, cdr(args));
+	delete_object(instance, args);
+	handle = (void *)get_ptr(instance, p1, item->prefix);
+	if (handle == NULL)
+		return &alsa_lisp_nil;
+	return new_integer(instance, ((snd_int_p_t)item->xfunc)(handle));
+}
+
+static struct alisp_object * FA_str_p(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	void *handle;
+	struct alisp_object * p1;
+
+	p1 = eval(instance, car(args));
+	delete_tree(instance, cdr(args));
+	delete_object(instance, args);
+	handle = (void *)get_ptr(instance, p1, item->prefix);
+	if (handle == NULL)
+		return &alsa_lisp_nil;
+	return new_string(instance, ((snd_str_p_t)item->xfunc)(handle));
+}
+
+static struct alisp_object * FA_int_intp(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	int val, err;
+	struct alisp_object * p1;
+
+	p1 = eval(instance, car(args));
+	delete_tree(instance, cdr(args));
+	delete_object(instance, args);
+	if (!alisp_compare_type(p1, ALISP_OBJ_INTEGER)) {
+		delete_tree(instance, p1);
+		return &alsa_lisp_nil;
+	}
+	val = p1->value.i;
+	delete_tree(instance, p1);
+	err = ((snd_int_intp_t)item->xfunc)(&val);
+	return new_result2(instance, err, val);
+}
+
+static struct alisp_object * FA_int_str(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	int err;
+	struct alisp_object * p1;
+
+	p1 = eval(instance, car(args));
+	delete_tree(instance, cdr(args));
+	delete_object(instance, args);
+	if (!alisp_compare_type(p1, ALISP_OBJ_STRING) &&
+	    !alisp_compare_type(p1, ALISP_OBJ_IDENTIFIER)) {
+		delete_tree(instance, p1);
+		return &alsa_lisp_nil;
+	}
+	err = ((snd_int_str_t)item->xfunc)(p1->value.s);
+	delete_tree(instance, p1);
+	return new_integer(instance, err);
+}
+
+static struct alisp_object * FA_int_int_strp(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	int err;
+	char *str;
+	long val;
+	struct alisp_object * p1;
+
+	p1 = eval(instance, car(args));
+	delete_tree(instance, cdr(args));
+	delete_object(instance, args);
+	if (!alisp_compare_type(p1, ALISP_OBJ_INTEGER)) {
+		delete_tree(instance, p1);
+		return &alsa_lisp_nil;
+	}
+	val = p1->value.i;
+	delete_tree(instance, p1);
+	err = ((snd_int_int_strp_t)item->xfunc)(val, &str);
+	return new_result3(instance, err, str);
+}
+
+static struct alisp_object * FA_card_info(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	snd_ctl_t *handle;
+	struct alisp_object * lexpr, * p1;
+	snd_ctl_card_info_t * info;
+	int err;
+
+	p1 = eval(instance, car(args));
+	delete_tree(instance, cdr(args));
+	delete_object(instance, args);
+	handle = (snd_ctl_t *)get_ptr(instance, p1, item->prefix);
+	if (handle == NULL)
+		return &alsa_lisp_nil;
+	snd_ctl_card_info_alloca(&info);
+	err = snd_ctl_card_info(handle, info);
+	lexpr = new_lexpr(instance, err);
+	if (err < 0)
+		return lexpr;
+	p1 = add_cons(instance, lexpr->value.c.cdr, 0, "id", new_string(instance, snd_ctl_card_info_get_id(info)));
+	p1 = add_cons(instance, p1, 1, "driver", new_string(instance, snd_ctl_card_info_get_driver(info)));
+	p1 = add_cons(instance, p1, 1, "name", new_string(instance, snd_ctl_card_info_get_name(info)));
+	p1 = add_cons(instance, p1, 1, "longname", new_string(instance, snd_ctl_card_info_get_longname(info)));
+	p1 = add_cons(instance, p1, 1, "mixername", new_string(instance, snd_ctl_card_info_get_mixername(info)));
+	p1 = add_cons(instance, p1, 1, "components", new_string(instance, snd_ctl_card_info_get_components(info)));
+	if (p1 == NULL) {
+		delete_tree(instance, lexpr);
+		return NULL;
+	}
+	return lexpr;
+}
+
+static struct alisp_object * create_ctl_elem_id(struct alisp_instance * instance, snd_ctl_elem_id_t * id, struct alisp_object * cons)
+{
+	cons = add_cons(instance, cons, 0, "numid", new_integer(instance, snd_ctl_elem_id_get_numid(id)));
+	cons = add_cons(instance, cons, 1, "iface", new_string(instance, snd_ctl_elem_iface_name(snd_ctl_elem_id_get_interface(id))));
+	cons = add_cons(instance, cons, 1, "dev", new_integer(instance, snd_ctl_elem_id_get_device(id)));
+	cons = add_cons(instance, cons, 1, "subdev", new_integer(instance, snd_ctl_elem_id_get_subdevice(id)));
+	cons = add_cons(instance, cons, 1, "name", new_string(instance, snd_ctl_elem_id_get_name(id)));
+	cons = add_cons(instance, cons, 1, "index", new_integer(instance, snd_ctl_elem_id_get_index(id)));
+	return cons;
+}
+
+static int parse_ctl_elem_id(struct alisp_instance * instance,
+			     struct alisp_object * cons,
+			     snd_ctl_elem_id_t * id)
+{
+	struct alisp_object *p1;
+	const char *xid;
+
+	if (cons == NULL)
+		return -ENOMEM;
+	snd_ctl_elem_id_clear(id);
+	id->numid = 0;
+	do {
+		p1 = car(cons);
+		if (alisp_compare_type(p1, ALISP_OBJ_CONS)) {
+			xid = get_string(p1->value.c.car, NULL);
+			if (xid == NULL) {
+				/* noop */
+			} else if (!strcmp(xid, "numid")) {
+				snd_ctl_elem_id_set_numid(id, get_integer(p1->value.c.cdr));
+			} else if (!strcmp(xid, "iface")) {
+				snd_ctl_elem_id_set_interface(id, snd_config_get_ctl_iface_ascii(get_string(p1->value.c.cdr, "0")));
+			} else if (!strcmp(xid, "dev")) {
+				snd_ctl_elem_id_set_device(id, get_integer(p1->value.c.cdr));
+			} else if (!strcmp(xid, "subdev")) {
+				snd_ctl_elem_id_set_subdevice(id, get_integer(p1->value.c.cdr));
+			} else if (!strcmp(xid, "name")) {
+				snd_ctl_elem_id_set_name(id, get_string(p1->value.c.cdr, "?"));
+			} else if (!strcmp(xid, "index")) {
+				snd_ctl_elem_id_set_index(id, get_integer(p1->value.c.cdr));
+			}
+		}
+		delete_tree(instance, p1);
+	        cons = cdr(p1 = cons);
+	        delete_object(instance, p1);
+	} while (cons != &alsa_lisp_nil);
+	return 0;
+}
+
+static struct alisp_object * FA_hctl_find_elem(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	snd_hctl_t *handle;
+	snd_ctl_elem_id_t *id;
+	struct alisp_object *p1;
+
+	handle = (snd_hctl_t *)get_ptr(instance, car(args), item->prefix);
+	if (handle == NULL) {
+		delete_tree(instance, cdr(args));
+		delete_object(instance, args);
+		return &alsa_lisp_nil;
+	}
+	snd_ctl_elem_id_alloca(&id);
+	p1 = car(cdr(args));
+	delete_tree(instance, cdr(cdr(args)));
+	delete_object(instance, cdr(args));
+	delete_object(instance, args);
+	if (parse_ctl_elem_id(instance, eval(instance, p1), id) < 0)
+		return &alsa_lisp_nil;
+	return new_cons_pointer(instance, "hctl_elem", snd_hctl_find_elem(handle, id));
+}
+
+static struct alisp_object * FA_hctl_elem_info(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	snd_hctl_elem_t *handle;
+	struct alisp_object * lexpr, * p1, * p2;
+	snd_ctl_elem_info_t *info;
+	snd_ctl_elem_id_t *id;
+	snd_ctl_elem_type_t type;
+	int err;
+
+	p1 = eval(instance, car(args));
+	delete_tree(instance, cdr(args));
+	delete_object(instance, args);
+	handle = (snd_hctl_elem_t *)get_ptr(instance, p1, item->prefix);
+	if (handle == NULL)
+		return &alsa_lisp_nil;
+	snd_ctl_elem_info_alloca(&info);
+	snd_ctl_elem_id_alloca(&id);
+	err = snd_hctl_elem_info(handle, info);
+	lexpr = new_lexpr(instance, err);
+	if (err < 0)
+		return lexpr;
+	type = snd_ctl_elem_info_get_type(info);
+	p1 = add_cons(instance, lexpr->value.c.cdr, 0, "id", p2 = new_object(instance, ALISP_OBJ_CONS));
+	snd_ctl_elem_info_get_id(info, id);
+	if (create_ctl_elem_id(instance, id, p2) == NULL) {
+		delete_tree(instance, lexpr);
+		return NULL;
+	}
+	p1 = add_cons(instance, p1, 1, "type", new_string(instance, snd_ctl_elem_type_name(type)));
+	p1 = add_cons(instance, p1, 1, "readable", new_integer(instance, snd_ctl_elem_info_is_readable(info)));
+	p1 = add_cons(instance, p1, 1, "writeable", new_integer(instance, snd_ctl_elem_info_is_writable(info)));
+	p1 = add_cons(instance, p1, 1, "volatile", new_integer(instance, snd_ctl_elem_info_is_volatile(info)));
+	p1 = add_cons(instance, p1, 1, "inactive", new_integer(instance, snd_ctl_elem_info_is_inactive(info)));
+	p1 = add_cons(instance, p1, 1, "locked", new_integer(instance, snd_ctl_elem_info_is_locked(info)));
+	p1 = add_cons(instance, p1, 1, "isowner", new_integer(instance, snd_ctl_elem_info_is_owner(info)));
+	p1 = add_cons(instance, p1, 1, "owner", new_integer(instance, snd_ctl_elem_info_get_owner(info)));
+	p1 = add_cons(instance, p1, 1, "count", new_integer(instance, snd_ctl_elem_info_get_count(info)));
+	err = snd_ctl_elem_info_get_dimensions(info);
+	if (err > 0) {
+		int idx;
+		p1 = add_cons(instance, p1, 1, "dimensions", p2 = new_object(instance, ALISP_OBJ_CONS));
+		for (idx = 0; idx < err; idx++)
+			p2 = add_cons2(instance, p2, idx > 0, new_integer(instance, snd_ctl_elem_info_get_dimension(info, idx)));
+	}
+	switch (type) {
+	case SND_CTL_ELEM_TYPE_ENUMERATED: {
+		unsigned int items, item;
+		items = snd_ctl_elem_info_get_items(info);
+		p1 = add_cons(instance, p1, 1, "items", p2 = new_object(instance, ALISP_OBJ_CONS));
+		for (item = 0; item < items; item++) {
+			snd_ctl_elem_info_set_item(info, item);
+			err = snd_hctl_elem_info(handle, info);
+			if (err < 0) {
+				p2 = add_cons2(instance, p2, item, &alsa_lisp_nil);
+			} else {
+				p2 = add_cons2(instance, p2, item, new_string(instance, snd_ctl_elem_info_get_item_name(info)));
+			}
+		}
+		break;
+	}
+	case SND_CTL_ELEM_TYPE_INTEGER:
+		p1 = add_cons(instance, p1, 1, "min", new_integer(instance, snd_ctl_elem_info_get_min(info)));
+		p1 = add_cons(instance, p1, 1, "max", new_integer(instance, snd_ctl_elem_info_get_max(info)));
+		p1 = add_cons(instance, p1, 1, "step", new_integer(instance, snd_ctl_elem_info_get_step(info)));
+		break;
+	case SND_CTL_ELEM_TYPE_INTEGER64:
+		p1 = add_cons(instance, p1, 1, "min64", new_float(instance, snd_ctl_elem_info_get_min64(info)));
+		p1 = add_cons(instance, p1, 1, "max64", new_float(instance, snd_ctl_elem_info_get_max64(info)));
+		p1 = add_cons(instance, p1, 1, "step64", new_float(instance, snd_ctl_elem_info_get_step64(info)));
+		break;
+	default:
+		break;
+	}
+	if (p1 == NULL) {
+		delete_tree(instance, lexpr);
+		return NULL;
+	}
+	return lexpr;
+}
+
+static struct alisp_object * FA_hctl_elem_read(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	snd_hctl_elem_t *handle;
+	struct alisp_object * lexpr, * p1 = NULL, * obj;
+	snd_ctl_elem_info_t *info;
+	snd_ctl_elem_value_t *value;
+	snd_ctl_elem_type_t type;
+	unsigned int idx, count;
+	int err;
+
+	p1 = eval(instance, car(args));
+	delete_tree(instance, cdr(args));
+	delete_object(instance, args);
+	handle = (snd_hctl_elem_t *)get_ptr(instance, p1, item->prefix);
+	if (handle == NULL)
+		return &alsa_lisp_nil;
+	snd_ctl_elem_info_alloca(&info);
+	snd_ctl_elem_value_alloca(&value);
+	err = snd_hctl_elem_info(handle, info);
+	if (err >= 0)
+		err = snd_hctl_elem_read(handle, value);
+	lexpr = new_lexpr(instance, err);
+	if (err < 0)
+		return lexpr;
+	type = snd_ctl_elem_info_get_type(info);
+	count = snd_ctl_elem_info_get_count(info);
+	if (type == SND_CTL_ELEM_TYPE_IEC958) {
+		count = sizeof(snd_aes_iec958_t);
+		type = SND_CTL_ELEM_TYPE_BYTES;
+	}
+	for (idx = 0; idx < count; idx++) {
+		switch (type) {
+		case SND_CTL_ELEM_TYPE_BOOLEAN:
+			obj = new_integer(instance, snd_ctl_elem_value_get_boolean(value, idx));
+			break;
+		case SND_CTL_ELEM_TYPE_INTEGER:
+			obj = new_integer(instance, snd_ctl_elem_value_get_integer(value, idx));
+			break;
+		case SND_CTL_ELEM_TYPE_INTEGER64:
+			obj = new_integer(instance, snd_ctl_elem_value_get_integer64(value, idx));
+			break;
+		case SND_CTL_ELEM_TYPE_ENUMERATED:
+			obj = new_integer(instance, snd_ctl_elem_value_get_enumerated(value, idx));
+			break;
+		case SND_CTL_ELEM_TYPE_BYTES:
+			obj = new_integer(instance, snd_ctl_elem_value_get_byte(value, idx));
+			break;
+		default:
+			obj = NULL;
+			break;
+		}
+		if (idx == 0) {
+			p1 = add_cons2(instance, lexpr->value.c.cdr, 0, obj);
+		} else {
+			p1 = add_cons2(instance, p1, 1, obj);
+		}
+	}
+	if (p1 == NULL) {
+		delete_tree(instance, lexpr);
+		return &alsa_lisp_nil;
+	}
+	return lexpr;
+}
+
+static struct alisp_object * FA_hctl_elem_write(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	snd_hctl_elem_t *handle;
+	struct alisp_object * p1 = NULL, * obj;
+	snd_ctl_elem_info_t *info;
+	snd_ctl_elem_value_t *value;
+	snd_ctl_elem_type_t type;
+	unsigned int idx, count;
+	int err;
+
+	p1 = car(cdr(args));
+	obj = eval(instance, car(args));
+	delete_tree(instance, cdr(cdr(args)));
+	delete_object(instance, cdr(args));
+	delete_object(instance, args);
+	handle = (snd_hctl_elem_t *)get_ptr(instance, obj, item->prefix);
+	if (handle == NULL) {
+		delete_tree(instance, p1);
+		return &alsa_lisp_nil;
+	}
+	snd_ctl_elem_info_alloca(&info);
+	snd_ctl_elem_value_alloca(&value);
+	err = snd_hctl_elem_info(handle, info);
+	if (err < 0) {
+		delete_tree(instance, p1);
+		return new_integer(instance, err);
+	}
+	type = snd_ctl_elem_info_get_type(info);
+	count = snd_ctl_elem_info_get_count(info);
+	if (type == SND_CTL_ELEM_TYPE_IEC958) {
+		count = sizeof(snd_aes_iec958_t);
+		type = SND_CTL_ELEM_TYPE_BYTES;
+	}
+	idx = -1;
+	do {
+		if (++idx >= count) {
+			delete_tree(instance, p1);
+			break;
+		}
+		obj = car(p1);
+		switch (type) {
+		case SND_CTL_ELEM_TYPE_BOOLEAN:
+			snd_ctl_elem_value_set_boolean(value, idx, get_integer(obj));
+			break;
+		case SND_CTL_ELEM_TYPE_INTEGER:
+			snd_ctl_elem_value_set_integer(value, idx, get_integer(obj));
+			break;
+		case SND_CTL_ELEM_TYPE_INTEGER64:
+			snd_ctl_elem_value_set_integer64(value, idx, get_integer(obj));
+			break;
+		case SND_CTL_ELEM_TYPE_ENUMERATED:
+			snd_ctl_elem_value_set_enumerated(value, idx, get_integer(obj));
+			break;
+		case SND_CTL_ELEM_TYPE_BYTES:
+			snd_ctl_elem_value_set_byte(value, idx, get_integer(obj));
+			break;
+		default:
+			break;
+		}
+		delete_tree(instance, obj);
+		p1 = cdr(obj = p1);
+		delete_object(instance, obj);
+	} while (p1 != &alsa_lisp_nil);
+	err = snd_hctl_elem_write(handle, value);
+	return new_integer(instance, err);
+}
+
+static struct alisp_object * FA_pcm_info(struct alisp_instance * instance, struct acall_table * item, struct alisp_object * args)
+{
+	snd_pcm_t *handle;
+	struct alisp_object * lexpr, * p1;
+	snd_pcm_info_t *info;
+	int err;
+
+	p1 = eval(instance, car(args));
+	delete_tree(instance, cdr(args));
+	delete_object(instance, args);
+	handle = (snd_pcm_t *)get_ptr(instance, p1, item->prefix);
+	if (handle == NULL)
+		return &alsa_lisp_nil;
+	snd_pcm_info_alloca(&info);
+	err = snd_pcm_info(handle, info);
+	lexpr = new_lexpr(instance, err);
+	if (err < 0)
+		return lexpr;
+	p1 = add_cons(instance, lexpr->value.c.cdr, 0, "card", new_integer(instance, snd_pcm_info_get_card(info)));
+	p1 = add_cons(instance, p1, 1, "device", new_integer(instance, snd_pcm_info_get_device(info)));
+	p1 = add_cons(instance, p1, 1, "subdevice", new_integer(instance, snd_pcm_info_get_subdevice(info)));
+	p1 = add_cons(instance, p1, 1, "id", new_string(instance, snd_pcm_info_get_id(info)));
+	p1 = add_cons(instance, p1, 1, "name", new_string(instance, snd_pcm_info_get_name(info)));
+	p1 = add_cons(instance, p1, 1, "subdevice_name", new_string(instance, snd_pcm_info_get_subdevice_name(info)));
+	p1 = add_cons(instance, p1, 1, "class", new_integer(instance, snd_pcm_info_get_class(info)));
+	p1 = add_cons(instance, p1, 1, "subclass", new_integer(instance, snd_pcm_info_get_subclass(info)));
+	p1 = add_cons(instance, p1, 1, "subdevices_count", new_integer(instance, snd_pcm_info_get_subdevices_count(info)));
+	p1 = add_cons(instance, p1, 1, "subdevices_avail", new_integer(instance, snd_pcm_info_get_subdevices_avail(info)));
+	//p1 = add_cons(instance, p1, 1, "sync", new_string(instance, snd_pcm_info_get_sync(info)));
+	return lexpr;
+}
+
+/*
+ *  main code
+ */
+
+static struct acall_table acall_table[] = {
+	{ "card_get_index", &FA_int_str, (void *)snd_card_get_index, NULL },
+	{ "card_get_longname", &FA_int_int_strp, (void *)snd_card_get_longname, NULL },
+	{ "card_get_name", &FA_int_int_strp, (void *)snd_card_get_name, NULL },
+	{ "card_next", &FA_int_intp, (void *)&snd_card_next, NULL },
+	{ "ctl_card_info", &FA_card_info, NULL, "ctl" },
+	{ "ctl_close", &FA_int_p, (void *)&snd_ctl_close, "ctl" },
+	{ "ctl_open", &FA_int_pp_strp_int, (void *)&snd_ctl_open, "ctl" },
+	{ "hctl_close", &FA_int_p, (void *)&snd_hctl_close, "hctl" },
+	{ "hctl_ctl", &FA_p_p, (void *)&snd_hctl_ctl, "hctl" },
+	{ "hctl_elem_info", &FA_hctl_elem_info, (void *)&snd_hctl_elem_info, "hctl_elem" },
+	{ "hctl_elem_next", &FA_p_p, (void *)&snd_hctl_elem_next, "hctl_elem" },
+	{ "hctl_elem_prev", &FA_p_p, (void *)&snd_hctl_elem_prev, "hctl_elem" },
+	{ "hctl_elem_read", &FA_hctl_elem_read, (void *)&snd_hctl_elem_read, "hctl_elem" },
+	{ "hctl_elem_write", &FA_hctl_elem_write, (void *)&snd_hctl_elem_write, "hctl_elem" },
+	{ "hctl_find_elem", &FA_hctl_find_elem, (void *)&snd_hctl_find_elem, "hctl" },
+	{ "hctl_first_elem", &FA_p_p, (void *)&snd_hctl_first_elem, "hctl" },
+	{ "hctl_free", &FA_int_p, (void *)&snd_hctl_free, "hctl" },
+	{ "hctl_last_elem", &FA_p_p, (void *)&snd_hctl_last_elem, "hctl" },
+	{ "hctl_load", &FA_int_p, (void *)&snd_hctl_load, "hctl" },
+	{ "hctl_open", &FA_int_pp_strp_int, (void *)&snd_hctl_open, "hctl" },
+	{ "hctl_open_ctl", &FA_int_pp_p, (void *)&snd_hctl_open_ctl, "hctl" },
+	{ "pcm_info", &FA_pcm_info, NULL, "pcm" },
+	{ "pcm_name", &FA_str_p, (void *)&snd_pcm_name, "pcm" },
+};
+
+static int acall_compar(const void *p1, const void *p2)
+{
+	return strcmp(((struct acall_table *)p1)->name,
+        	      ((struct acall_table *)p2)->name);
+}
+
+static struct alisp_object * F_acall(struct alisp_instance *instance, struct alisp_object * args)
+{
+	struct alisp_object * p1, *p2;
+	struct acall_table key, *item;
+
+	p1 = eval(instance, car(args));
+	p2 = cdr(args);
+	delete_object(instance, args);
+	if (!alisp_compare_type(p1, ALISP_OBJ_IDENTIFIER) &&
+	    !alisp_compare_type(p1, ALISP_OBJ_STRING)) {
+	    	delete_tree(instance, p2);
+		return &alsa_lisp_nil;
+	}
+	key.name = p1->value.s;
+	if ((item = bsearch(&key, acall_table,
+			    sizeof acall_table / sizeof acall_table[0],
+			    sizeof acall_table[0], acall_compar)) != NULL) {
+		delete_tree(instance, p1);
+		return item->func(instance, item, p2);
+	}
+	delete_tree(instance, p1);
+	delete_tree(instance, p2);
+	lisp_warn(instance, "acall function %s' is undefined", p1->value.s);
+	return &alsa_lisp_nil;
+}
+
+static struct alisp_object * F_ahandle(struct alisp_instance *instance, struct alisp_object * args)
+{
+	struct alisp_object *p1;
+
+	p1 = eval(instance, car(args));
+	delete_tree(instance, cdr(args));
+	delete_object(instance, args);
+	args = car(cdr(p1));
+	delete_tree(instance, cdr(cdr(p1)));
+	delete_object(instance, cdr(p1));
+	delete_tree(instance, car(p1));
+	delete_object(instance, p1);
+	return args;
+}
+
+static struct alisp_object * F_aerror(struct alisp_instance *instance, struct alisp_object * args)
+{
+	struct alisp_object *p1;
+
+	p1 = eval(instance, car(args));
+	delete_tree(instance, cdr(args));
+	delete_object(instance, args);
+	args = car(p1);
+	if (args == &alsa_lisp_nil) {
+		delete_tree(instance, p1);
+		return new_integer(instance, SND_ERROR_ALISP_NIL);
+	} else {
+		delete_tree(instance, cdr(p1));
+		delete_object(instance, p1);
+	}
+	return args;
+}
+
+static int common_error(snd_output_t **rout, struct alisp_instance *instance, struct alisp_object * args)
+{
+	struct alisp_object * p = args, * p1;
+	snd_output_t *out;
+	int err;
+	
+	err = snd_output_buffer_open(&out);
+	if (err < 0) {
+		delete_tree(instance, args);
+		return err;
+	}
+
+	do {
+		p1 = eval(instance, car(p));
+		if (alisp_compare_type(p1, ALISP_OBJ_STRING))
+			snd_output_printf(out, "%s", p1->value.s);
+		else
+			princ_object(out, p1);
+		delete_tree(instance, p1);
+		p = cdr(p1 = p);
+		delete_object(instance, p1);
+	} while (p != &alsa_lisp_nil);
+
+	*rout = out;
+	return 0;
+}
+
+static struct alisp_object * F_snderr(struct alisp_instance *instance, struct alisp_object * args)
+{
+	snd_output_t *out;
+	char *str;
+
+	if (common_error(&out, instance, args) < 0)
+		return &alsa_lisp_nil;
+	snd_output_buffer_string(out, &str);
+	SNDERR(str);
+	snd_output_close(out);
+	return &alsa_lisp_t;
+}
+
+static struct alisp_object * F_syserr(struct alisp_instance *instance, struct alisp_object * args)
+{
+	snd_output_t *out;
+	char *str;
+
+	if (common_error(&out, instance, args) < 0)
+		return &alsa_lisp_nil;
+	snd_output_buffer_string(out, &str);
+	SYSERR(str);
+	snd_output_close(out);
+	return &alsa_lisp_t;
+}
+
+static struct intrinsic snd_intrinsics[] = {
+	{ "Acall", F_acall },
+	{ "Aerror", F_aerror },
+	{ "Ahandle", F_ahandle },
+	{ "Aresult", F_ahandle },
+	{ "Asnderr", F_snderr },
+	{ "Asyserr", F_syserr }
+};