mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-11-03 09:01:52 -05:00
ucm: add the run-time variable substitution
Those two variables are supported:
${ConfName} - configuration file name
${CardId} - card identification string (like PCH)
${CardName} - card name (driver)
${CardLongName} - card long name (driver)
${env:ENV_NAME} - returns the environment variable ENV_NAME
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela
parent
40aef87f1e
commit
0dd89f3892
3 changed files with 179 additions and 22 deletions
183
src/ucm/main.c
183
src/ucm/main.c
|
|
@ -41,9 +41,10 @@
|
|||
* misc
|
||||
*/
|
||||
|
||||
static int get_value1(char **value, struct list_head *value_list,
|
||||
const char *identifier);
|
||||
static int get_value3(char **value,
|
||||
static int get_value1(snd_use_case_mgr_t *uc_mgr, char **value,
|
||||
struct list_head *value_list, const char *identifier);
|
||||
static int get_value3(snd_use_case_mgr_t *uc_mgr,
|
||||
char **value,
|
||||
const char *identifier,
|
||||
struct list_head *value_list1,
|
||||
struct list_head *value_list2,
|
||||
|
|
@ -359,7 +360,7 @@ static int execute_sequence(snd_use_case_mgr_t *uc_mgr,
|
|||
char *playback_ctl = NULL;
|
||||
char *capture_ctl = NULL;
|
||||
|
||||
err = get_value3(&playback_ctl, "PlaybackCTL",
|
||||
err = get_value3(uc_mgr, &playback_ctl, "PlaybackCTL",
|
||||
value_list1,
|
||||
value_list2,
|
||||
value_list3);
|
||||
|
|
@ -367,7 +368,7 @@ static int execute_sequence(snd_use_case_mgr_t *uc_mgr,
|
|||
uc_error("cdev is not defined!");
|
||||
return err;
|
||||
}
|
||||
err = get_value3(&capture_ctl, "CaptureCTL",
|
||||
err = get_value3(uc_mgr, &capture_ctl, "CaptureCTL",
|
||||
value_list1,
|
||||
value_list2,
|
||||
value_list3);
|
||||
|
|
@ -1351,8 +1352,156 @@ int snd_use_case_get_list(snd_use_case_mgr_t *uc_mgr,
|
|||
return err;
|
||||
}
|
||||
|
||||
static int get_value1(char **value, struct list_head *value_list,
|
||||
const char *identifier)
|
||||
static char *rval_conf_name(snd_use_case_mgr_t *uc_mgr)
|
||||
{
|
||||
if (uc_mgr->conf_file_name[0])
|
||||
return strdup(uc_mgr->conf_file_name);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static char *rval_card_id(snd_use_case_mgr_t *uc_mgr)
|
||||
{
|
||||
struct list_head *pos;
|
||||
struct ctl_list *ctl_list = NULL;
|
||||
|
||||
list_for_each(pos, &uc_mgr->ctl_list) {
|
||||
if (ctl_list) {
|
||||
uc_error("multiple control device names were found!");
|
||||
return NULL;
|
||||
}
|
||||
ctl_list = list_entry(pos, struct ctl_list, list);
|
||||
}
|
||||
|
||||
if (ctl_list == NULL)
|
||||
return NULL;
|
||||
|
||||
return strdup(ctl_list->ctl_id);
|
||||
}
|
||||
|
||||
static char *rval_card_name(snd_use_case_mgr_t *uc_mgr)
|
||||
{
|
||||
if (uc_mgr->card_short_name)
|
||||
return strdup(uc_mgr->card_short_name);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static char *rval_card_longname(snd_use_case_mgr_t *uc_mgr)
|
||||
{
|
||||
if (uc_mgr->card_long_name[0])
|
||||
return strdup(uc_mgr->card_long_name);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static char *rval_env(snd_use_case_mgr_t *uc_mgr ATTRIBUTE_UNUSED, const char *id)
|
||||
{
|
||||
char *e;
|
||||
|
||||
e = getenv(id);
|
||||
if (e)
|
||||
return strdup(e);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
#define MATCH_VARIABLE(name, id, fcn) \
|
||||
if (strncmp((name), (id), sizeof(id) - 1) == 0) { \
|
||||
rval = fcn(uc_mgr); \
|
||||
idsize = sizeof(id) - 1; \
|
||||
goto __rval; \
|
||||
}
|
||||
|
||||
#define MATCH_VARIABLE2(name, id, fcn) \
|
||||
if (strncmp((name), (id), sizeof(id) - 1) == 0) { \
|
||||
idsize = sizeof(id) - 1; \
|
||||
tmp = strchr(value + idsize, '}'); \
|
||||
if (tmp) { \
|
||||
rvalsize = tmp - (value + idsize); \
|
||||
if (rvalsize > sizeof(v2)) { \
|
||||
err = -ENOMEM; \
|
||||
goto __error; \
|
||||
} \
|
||||
strncpy(v2, value + idsize, rvalsize); \
|
||||
v2[rvalsize] = '\0'; \
|
||||
idsize += rvalsize + 1; \
|
||||
rval = fcn(uc_mgr, v2); \
|
||||
goto __rval; \
|
||||
} \
|
||||
}
|
||||
|
||||
static int get_substituted_value(snd_use_case_mgr_t *uc_mgr,
|
||||
char **_rvalue,
|
||||
const char *value)
|
||||
{
|
||||
size_t size, nsize, idsize, rvalsize, dpos = 0;
|
||||
const char *tmp;
|
||||
char *r, *nr, *rval, v2[32];
|
||||
int err;
|
||||
|
||||
if (value == NULL)
|
||||
return -ENOENT;
|
||||
|
||||
size = strlen(value) + 1;
|
||||
r = malloc(size);
|
||||
if (r == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
while (*value) {
|
||||
if (*value == '$' && *(value+1) == '{') {
|
||||
MATCH_VARIABLE(value, "${ConfName}", rval_conf_name);
|
||||
MATCH_VARIABLE(value, "${CardId}", rval_card_id);
|
||||
MATCH_VARIABLE(value, "${CardName}", rval_card_name);
|
||||
MATCH_VARIABLE(value, "${CardLongName}", rval_card_longname);
|
||||
MATCH_VARIABLE2(value, "${env:", rval_env);
|
||||
err = -EINVAL;
|
||||
tmp = strchr(value, '}');
|
||||
if (tmp) {
|
||||
strncpy(r, value, tmp + 1 - value);
|
||||
r[tmp + 1 - value] = '\0';
|
||||
uc_error("variable '%s' is not known!", r);
|
||||
} else {
|
||||
uc_error("variable reference '%s' is not complete", value);
|
||||
}
|
||||
goto __error;
|
||||
__rval:
|
||||
if (rval == NULL || rval[0] == '\0') {
|
||||
free(rval);
|
||||
strncpy(r, value, idsize);
|
||||
r[idsize] = '\0';
|
||||
uc_error("variable '%s' is not defined in this context!", r);
|
||||
err = -EINVAL;
|
||||
goto __error;
|
||||
}
|
||||
value += idsize;
|
||||
rvalsize = strlen(rval);
|
||||
nsize = size + rvalsize - idsize;
|
||||
if (nsize > size) {
|
||||
nr = realloc(r, nsize);
|
||||
if (nr == NULL) {
|
||||
err = -ENOMEM;
|
||||
goto __error;
|
||||
}
|
||||
size = nsize;
|
||||
r = nr;
|
||||
}
|
||||
strcpy(r + dpos, rval);
|
||||
dpos += rvalsize;
|
||||
free(rval);
|
||||
} else {
|
||||
r[dpos++] = *value;
|
||||
value++;
|
||||
}
|
||||
}
|
||||
r[dpos] = '\0';
|
||||
|
||||
*_rvalue = r;
|
||||
return 0;
|
||||
|
||||
__error:
|
||||
free(r);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int get_value1(snd_use_case_mgr_t *uc_mgr, char **value,
|
||||
struct list_head *value_list, const char *identifier)
|
||||
{
|
||||
struct ucm_value *val;
|
||||
struct list_head *pos;
|
||||
|
|
@ -1363,16 +1512,20 @@ static int get_value1(char **value, struct list_head *value_list,
|
|||
list_for_each(pos, value_list) {
|
||||
val = list_entry(pos, struct ucm_value, list);
|
||||
if (check_identifier(identifier, val->name)) {
|
||||
if (uc_mgr->conf_format < 2) {
|
||||
*value = strdup(val->data);
|
||||
if (*value == NULL)
|
||||
return -ENOMEM;
|
||||
return 0;
|
||||
}
|
||||
return get_substituted_value(uc_mgr, value, val->data);
|
||||
}
|
||||
}
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
static int get_value3(char **value,
|
||||
static int get_value3(snd_use_case_mgr_t *uc_mgr,
|
||||
char **value,
|
||||
const char *identifier,
|
||||
struct list_head *value_list1,
|
||||
struct list_head *value_list2,
|
||||
|
|
@ -1380,13 +1533,13 @@ static int get_value3(char **value,
|
|||
{
|
||||
int err;
|
||||
|
||||
err = get_value1(value, value_list1, identifier);
|
||||
err = get_value1(uc_mgr, value, value_list1, identifier);
|
||||
if (err >= 0 || err != -ENOENT)
|
||||
return err;
|
||||
err = get_value1(value, value_list2, identifier);
|
||||
err = get_value1(uc_mgr, value, value_list2, identifier);
|
||||
if (err >= 0 || err != -ENOENT)
|
||||
return err;
|
||||
err = get_value1(value, value_list3, identifier);
|
||||
err = get_value1(uc_mgr, value, value_list3, identifier);
|
||||
if (err >= 0 || err != -ENOENT)
|
||||
return err;
|
||||
return -ENOENT;
|
||||
|
|
@ -1423,7 +1576,7 @@ static int get_value(snd_use_case_mgr_t *uc_mgr,
|
|||
mod = find_modifier(uc_mgr, verb,
|
||||
mod_dev_name, 0);
|
||||
if (mod) {
|
||||
err = get_value1(value,
|
||||
err = get_value1(uc_mgr, value,
|
||||
&mod->value_list,
|
||||
identifier);
|
||||
if (err >= 0 || err != -ENOENT)
|
||||
|
|
@ -1433,7 +1586,7 @@ static int get_value(snd_use_case_mgr_t *uc_mgr,
|
|||
dev = find_device(uc_mgr, verb,
|
||||
mod_dev_name, 0);
|
||||
if (dev) {
|
||||
err = get_value1(value,
|
||||
err = get_value1(uc_mgr, value,
|
||||
&dev->value_list,
|
||||
identifier);
|
||||
if (err >= 0 || err != -ENOENT)
|
||||
|
|
@ -1444,7 +1597,7 @@ static int get_value(snd_use_case_mgr_t *uc_mgr,
|
|||
return -ENOENT;
|
||||
}
|
||||
|
||||
err = get_value1(value, &verb->value_list, identifier);
|
||||
err = get_value1(uc_mgr, value, &verb->value_list, identifier);
|
||||
if (err >= 0 || err != -ENOENT)
|
||||
return err;
|
||||
}
|
||||
|
|
@ -1453,7 +1606,7 @@ static int get_value(snd_use_case_mgr_t *uc_mgr,
|
|||
return -ENOENT;
|
||||
}
|
||||
|
||||
err = get_value1(value, &uc_mgr->value_list, identifier);
|
||||
err = get_value1(uc_mgr, value, &uc_mgr->value_list, identifier);
|
||||
if (err >= 0 || err != -ENOENT)
|
||||
return err;
|
||||
|
||||
|
|
|
|||
|
|
@ -1464,6 +1464,7 @@ static int get_card_long_name(snd_use_case_mgr_t *mgr)
|
|||
_long_name = snd_ctl_card_info_get_longname(info);
|
||||
if (!strcmp(card_name, _name) ||
|
||||
!strcmp(card_name, _long_name)) {
|
||||
snd_strlcpy(mgr->card_short_name, _name, sizeof(mgr->card_short_name));
|
||||
snd_strlcpy(mgr->card_long_name, _long_name, sizeof(mgr->card_long_name));
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -1495,6 +1496,7 @@ static int get_by_card(snd_use_case_mgr_t *mgr, const char *ctl_name)
|
|||
_name = snd_ctl_card_info_get_name(info);
|
||||
_long_name = snd_ctl_card_info_get_longname(info);
|
||||
|
||||
snd_strlcpy(mgr->card_short_name, _name, sizeof(mgr->card_short_name));
|
||||
snd_strlcpy(mgr->card_long_name, _long_name, sizeof(mgr->card_long_name));
|
||||
snd_strlcpy(mgr->conf_file_name, _name, sizeof(mgr->conf_file_name));
|
||||
|
||||
|
|
|
|||
|
|
@ -43,6 +43,7 @@
|
|||
#define SYNTAX_VERSION_MAX 2
|
||||
|
||||
#define MAX_FILE 256
|
||||
#define MAX_CARD_SHORT_NAME 32
|
||||
#define MAX_CARD_LONG_NAME 80
|
||||
|
||||
#define SEQUENCE_ELEMENT_TYPE_CDEV 1
|
||||
|
|
@ -204,6 +205,7 @@ struct use_case_verb {
|
|||
*/
|
||||
struct snd_use_case_mgr {
|
||||
char *card_name;
|
||||
char card_short_name[MAX_CARD_SHORT_NAME];
|
||||
char card_long_name[MAX_CARD_LONG_NAME];
|
||||
char conf_file_name[MAX_CARD_LONG_NAME];
|
||||
char *comment;
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue