/**
* \brief return ASCII CTL element identifier name
* \param id CTL identifier
* \return ascii identifier of CTL element
*
* The string is allocated using strdup().
*/
char *snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id)
{
unsigned int index, device, subdevice;
char buf[256], buf1[32];
snprintf(buf, sizeof(buf), "numid=%u,iface=%s,name='%s'",
snd_ctl_elem_id_get_numid(id),
snd_ctl_elem_iface_name(
snd_ctl_elem_id_get_interface(id)),
snd_ctl_elem_id_get_name(id));
buf[sizeof(buf)-1] = '\0';
index = snd_ctl_elem_id_get_index(id);
device = snd_ctl_elem_id_get_device(id);
subdevice = snd_ctl_elem_id_get_subdevice(id);
if (index) {
snprintf(buf1, sizeof(buf1), ",index=%i", index);
if (strlen(buf) + strlen(buf1) < sizeof(buf))
strcat(buf, buf1);
}
if (device) {
snprintf(buf1, sizeof(buf1), ",device=%i", device);
if (strlen(buf) + strlen(buf1) < sizeof(buf))
strcat(buf, buf1);
}
if (subdevice) {
snprintf(buf1, sizeof(buf1), ",subdevice=%i", subdevice);
if (strlen(buf) + strlen(buf1) < sizeof(buf))
strcat(buf, buf1);
}
return strdup(buf);
}
static long config_iface(snd_config_t *n)
{
long i;
long long li;
snd_ctl_elem_iface_t idx;
const char *str;
switch (snd_config_get_type(n)) {
case SND_CONFIG_TYPE_INTEGER:
snd_config_get_integer(n, &i);
return i;
case SND_CONFIG_TYPE_INTEGER64:
snd_config_get_integer64(n, &li);
return li;
case SND_CONFIG_TYPE_STRING:
snd_config_get_string(n, &str);
break;
default:
return -1;
}
for (idx = 0; idx <= SND_CTL_ELEM_IFACE_LAST; idx++) {
if (strcasecmp(snd_ctl_elem_iface_name(idx), str) == 0)
return idx;
}
return -1;
}
/**
* \brief Gets the control interface index from the given ASCII string.
* \param ascii The string to be parsed.
* \return The control interface index if successful, otherwise a negative error code.
*/
int snd_config_get_ctl_iface_ascii(const char *ascii)
{
long v;
snd_ctl_elem_iface_t idx;
if (isdigit(ascii[0])) {
if (safe_strtol(ascii, &v) >= 0) {
if (v < 0 || v > SND_CTL_ELEM_IFACE_LAST)
return -EINVAL;
return v;
}
}
for (idx = 0; idx <= SND_CTL_ELEM_IFACE_LAST; idx++) {
if (strcasecmp(snd_ctl_elem_iface_name(idx), ascii) == 0)
return idx;
}
return -EINVAL;
}
static const char *control_iface(snd_ctl_elem_id_t *id)
{
return snd_ctl_elem_iface_name(snd_ctl_elem_id_get_interface(id));
}
PyMODINIT_FUNC
initalsacontrol(void)
{
PyObject *d, *d1, *l1, *o;
int i;
if (PyType_Ready(&pyalsacontrol_type) < 0)
return;
module = Py_InitModule3("alsacontrol", pyalsacontrolparse_methods, "libasound control wrapper");
if (module == NULL)
return;
#if 0
buildin = PyImport_AddModule("__buildin__");
if (buildin == NULL)
return;
if (PyObject_SetAttrString(module, "__buildins__", buildin) < 0)
return;
#endif
Py_INCREF(&pyalsacontrol_type);
PyModule_AddObject(module, "Control", (PyObject *)&pyalsacontrol_type);
d = PyModule_GetDict(module);
/* ---- */
d1 = PyDict_New();
#define add_space1(pname, name) { \
o = PyInt_FromLong(SND_CTL_ELEM_IFACE_##name); \
PyDict_SetItemString(d1, pname, o); \
Py_DECREF(o); }
add_space1("CARD", CARD);
add_space1("HWDEP", HWDEP);
add_space1("MIXER", MIXER);
add_space1("PCM", PCM);
add_space1("RAWMIDI", RAWMIDI);
add_space1("TIMER", TIMER);
add_space1("SEQUENCER", SEQUENCER);
add_space1("LAST", LAST);
PyDict_SetItemString(d, "interface_id", d1);
Py_DECREF(d1);
/* ---- */
l1 = PyList_New(0);
for (i = 0; i <= SND_CTL_ELEM_IFACE_LAST; i++) {
o = PyString_FromString(snd_ctl_elem_iface_name(i));
PyList_Append(l1, o);
Py_DECREF(o);
}
PyDict_SetItemString(d, "interface_name", l1);
Py_DECREF(l1);
/* ---- */
d1 = PyDict_New();
#define add_space5(pname, name) { \
o = PyInt_FromLong(SND_CTL_##name); \
PyDict_SetItemString(d1, pname, o); \
Py_DECREF(o); }
add_space5("NONBLOCK", NONBLOCK);
add_space5("ASYNC", ASYNC);
add_space5("READONLY", READONLY);
PyDict_SetItemString(d, "open_mode", d1);
Py_DECREF(d1);
/* ---- */
if (PyErr_Occurred())
Py_FatalError("Cannot initialize module alsacontrol");
}
static int get_control(snd_ctl_t *handle, snd_ctl_elem_id_t *id, snd_config_t *top)
{
snd_ctl_elem_value_t *ctl;
snd_ctl_elem_info_t *info;
snd_config_t *control, *comment, *item, *value;
const char *s;
char buf[256];
unsigned int idx;
int err;
unsigned int device, subdevice, index;
const char *name;
snd_ctl_elem_type_t type;
unsigned int count;
snd_ctl_elem_value_alloca(&ctl);
snd_ctl_elem_info_alloca(&info);
snd_ctl_elem_info_set_id(info, id);
err = snd_ctl_elem_info(handle, info);
if (err < 0) {
error("Cannot read control info '%s': %s", id_str(id), snd_strerror(err));
return err;
}
if (snd_ctl_elem_info_is_inactive(info) ||
!snd_ctl_elem_info_is_readable(info))
return 0;
snd_ctl_elem_value_set_id(ctl, id);
err = snd_ctl_elem_read(handle, ctl);
if (err < 0) {
error("Cannot read control '%s': %s", id_str(id), snd_strerror(err));
return err;
}
err = snd_config_compound_add(top, num_str(snd_ctl_elem_info_get_numid(info)), 0, &control);
if (err < 0) {
error("snd_config_compound_add: %s", snd_strerror(err));
return err;
}
err = snd_config_compound_add(control, "comment", 1, &comment);
if (err < 0) {
error("snd_config_compound_add: %s", snd_strerror(err));
return err;
}
buf[0] = '\0';
buf[1] = '\0';
if (snd_ctl_elem_info_is_readable(info))
strcat(buf, " read");
if (snd_ctl_elem_info_is_writable(info))
strcat(buf, " write");
if (snd_ctl_elem_info_is_inactive(info))
strcat(buf, " inactive");
if (snd_ctl_elem_info_is_volatile(info))
strcat(buf, " volatile");
if (snd_ctl_elem_info_is_locked(info))
strcat(buf, " locked");
if (snd_ctl_elem_info_is_user(info))
strcat(buf, " user");
err = snd_config_string_add(comment, "access", buf + 1);
if (err < 0) {
error("snd_config_string_add: %s", snd_strerror(err));
return err;
}
type = snd_ctl_elem_info_get_type(info);
device = snd_ctl_elem_info_get_device(info);
subdevice = snd_ctl_elem_info_get_subdevice(info);
index = snd_ctl_elem_info_get_index(info);
name = snd_ctl_elem_info_get_name(info);
count = snd_ctl_elem_info_get_count(info);
s = snd_ctl_elem_type_name(type);
err = snd_config_string_add(comment, "type", s);
if (err < 0) {
error("snd_config_string_add: %s", snd_strerror(err));
return err;
}
err = snd_config_integer_add(comment, "count", count);
if (err < 0) {
error("snd_config_integer_add: %s", snd_strerror(err));
return err;
}
switch (type) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
break;
case SND_CTL_ELEM_TYPE_INTEGER:
{
long min = snd_ctl_elem_info_get_min(info);
long max = snd_ctl_elem_info_get_max(info);
long step = snd_ctl_elem_info_get_step(info);
if (step)
sprintf(buf, "%li - %li (step %li)", min, max, step);
else
sprintf(buf, "%li - %li", min, max);
err = snd_config_string_add(comment, "range", buf);
if (err < 0) {
error("snd_config_string_add: %s", snd_strerror(err));
return err;
}
if (snd_ctl_elem_info_is_tlv_readable(info)) {
err = add_tlv_comments(handle, id, info, comment);
if (err < 0)
return err;
}
break;
}
case SND_CTL_ELEM_TYPE_INTEGER64:
{
long long min = snd_ctl_elem_info_get_min64(info);
long long max = snd_ctl_elem_info_get_max64(info);
long long step = snd_ctl_elem_info_get_step64(info);
if (step)
sprintf(buf, "%Li - %Li (step %Li)", min, max, step);
else
sprintf(buf, "%Li - %Li", min, max);
err = snd_config_string_add(comment, "range", buf);
if (err < 0) {
error("snd_config_string_add: %s", snd_strerror(err));
return err;
}
break;
}
case SND_CTL_ELEM_TYPE_ENUMERATED:
{
unsigned int items;
err = snd_config_compound_add(comment, "item", 1, &item);
if (err < 0) {
error("snd_config_compound_add: %s", snd_strerror(err));
return err;
}
items = snd_ctl_elem_info_get_items(info);
for (idx = 0; idx < items; idx++) {
snd_ctl_elem_info_set_item(info, idx);
err = snd_ctl_elem_info(handle, info);
if (err < 0) {
error("snd_ctl_card_info: %s", snd_strerror(err));
return err;
}
err = snd_config_string_add(item, num_str(idx), snd_ctl_elem_info_get_item_name(info));
if (err < 0) {
error("snd_config_string_add: %s", snd_strerror(err));
return err;
}
}
break;
}
default:
break;
}
s = snd_ctl_elem_iface_name(snd_ctl_elem_info_get_interface(info));
err = snd_config_string_add(control, "iface", s);
if (err < 0) {
error("snd_config_string_add: %s", snd_strerror(err));
return err;
}
if (device != 0) {
err = snd_config_integer_add(control, "device", device);
if (err < 0) {
error("snd_config_integer_add: %s", snd_strerror(err));
return err;
}
}
if (subdevice != 0) {
err = snd_config_integer_add(control, "subdevice", subdevice);
if (err < 0) {
error("snd_config_integer_add: %s", snd_strerror(err));
return err;
}
}
err = snd_config_string_add(control, "name", name);
if (err < 0) {
error("snd_config_string_add: %s", snd_strerror(err));
return err;
}
if (index != 0) {
err = snd_config_integer_add(control, "index", index);
if (err < 0) {
error("snd_config_integer_add: %s", snd_strerror(err));
return err;
}
}
switch (type) {
case SND_CTL_ELEM_TYPE_BYTES:
case SND_CTL_ELEM_TYPE_IEC958:
{
size_t size = type == SND_CTL_ELEM_TYPE_BYTES ?
count : sizeof(snd_aes_iec958_t);
char buf[size * 2 + 1];
char *p = buf;
char *hex = "0123456789abcdef";
const unsigned char *bytes =
(const unsigned char *)snd_ctl_elem_value_get_bytes(ctl);
for (idx = 0; idx < size; idx++) {
int v = bytes[idx];
*p++ = hex[v >> 4];
*p++ = hex[v & 0x0f];
}
*p = '\0';
err = snd_config_string_add(control, "value", buf);
if (err < 0) {
error("snd_config_string_add: %s", snd_strerror(err));
return err;
}
return 0;
}
default:
break;
}
if (count == 1) {
switch (type) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
err = snd_config_string_add(control, "value", snd_ctl_elem_value_get_boolean(ctl, 0) ? "true" : "false");
if (err < 0) {
error("snd_config_string_add: %s", snd_strerror(err));
return err;
}
return 0;
case SND_CTL_ELEM_TYPE_INTEGER:
err = snd_config_integer_add(control, "value", snd_ctl_elem_value_get_integer(ctl, 0));
if (err < 0) {
error("snd_config_integer_add: %s", snd_strerror(err));
return err;
}
return 0;
case SND_CTL_ELEM_TYPE_INTEGER64:
err = snd_config_integer64_add(control, "value", snd_ctl_elem_value_get_integer64(ctl, 0));
if (err < 0) {
error("snd_config_integer64_add: %s", snd_strerror(err));
return err;
}
return 0;
case SND_CTL_ELEM_TYPE_ENUMERATED:
{
unsigned int v = snd_ctl_elem_value_get_enumerated(ctl, 0);
snd_config_t *c;
err = snd_config_search(item, num_str(v), &c);
if (err == 0) {
err = snd_config_get_string(c, &s);
assert(err == 0);
err = snd_config_string_add(control, "value", s);
} else {
err = snd_config_integer_add(control, "value", v);
}
if (err < 0)
error("snd_config add: %s", snd_strerror(err));
return 0;
}
default:
error("Unknown control type: %d\n", type);
return -EINVAL;
}
}
err = snd_config_compound_add(control, "value", 1, &value);
if (err < 0) {
error("snd_config_compound_add: %s", snd_strerror(err));
return err;
}
switch (type) {
case SND_CTL_ELEM_TYPE_BOOLEAN:
for (idx = 0; idx < count; idx++) {
err = snd_config_string_add(value, num_str(idx), snd_ctl_elem_value_get_boolean(ctl, idx) ? "true" : "false");
if (err < 0) {
error("snd_config_string_add: %s", snd_strerror(err));
return err;
}
}
break;
case SND_CTL_ELEM_TYPE_INTEGER:
for (idx = 0; idx < count; idx++) {
err = snd_config_integer_add(value, num_str(idx), snd_ctl_elem_value_get_integer(ctl, idx));
if (err < 0) {
error("snd_config_integer_add: %s", snd_strerror(err));
return err;
}
}
break;
case SND_CTL_ELEM_TYPE_INTEGER64:
for (idx = 0; idx < count; idx++) {
err = snd_config_integer64_add(value, num_str(idx), snd_ctl_elem_value_get_integer64(ctl, idx));
if (err < 0) {
error("snd_config_integer64_add: %s", snd_strerror(err));
return err;
}
}
break;
case SND_CTL_ELEM_TYPE_ENUMERATED:
for (idx = 0; idx < count; idx++) {
unsigned int v = snd_ctl_elem_value_get_enumerated(ctl, idx);
snd_config_t *c;
err = snd_config_search(item, num_str(v), &c);
if (err == 0) {
err = snd_config_get_string(c, &s);
assert(err == 0);
err = snd_config_string_add(value, num_str(idx), s);
} else {
err = snd_config_integer_add(value, num_str(idx), v);
}
if (err < 0) {
error("snd_config add: %s", snd_strerror(err));
return err;
}
}
break;
default:
error("Unknown control type: %d\n", type);
return -EINVAL;
}
return 0;
}
