ucm: add snd_use_case_parse_ctl_elem_id()

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

diff --git a/include/use-case.h b/include/use-case.h
index 37d0572..109502a 100644 (file)
--- a/include/use-case.h
+++ b/include/use-case.h
@@ -440,6 +440,17 @@ static __inline__ int snd_use_case_verb_list(snd_use_case_mgr_t *uc_mgr,
 }
 
 /**
+ * \brief Parse control element identifier
+ * \param elem_id Element identifier
+ * \param ucm_id Use case identifier
+ * \param value String value to be parsed
+ * \return Zero if success, otherwise a negative error code
+ */
+int snd_use_case_parse_ctl_elem_id(snd_ctl_elem_id_t *dst,
+                                  const char *ucm_id, char *value);
+
+
+/**
  *  \}
  */
 

diff --git a/src/ucm/main.c b/src/ucm/main.c
index 25c02e1..773c725 100644 (file)
--- a/src/ucm/main.c
+++ b/src/ucm/main.c
@@ -1920,3 +1920,26 @@ int snd_use_case_set(snd_use_case_mgr_t *uc_mgr,
        pthread_mutex_unlock(&uc_mgr->mutex);
         return err;
 }
+
+/**
+ * \brief Parse control element identifier
+ * \param elem_id Element identifier
+ * \param ucm_id Use case identifier
+ * \param value String value to be parsed
+ * \return Zero if success, otherwise a negative error code
+ */
+int snd_use_case_parse_ctl_elem_id(snd_ctl_elem_id_t *dst,
+                                  const char *ucm_id, char *value)
+{
+       snd_ctl_elem_iface_t iface;
+
+       snd_ctl_elem_id_clear(dst);
+       if (strcasestr(ucm_id, "name="))
+               return __snd_ctl_ascii_elem_id_parse(dst, value, NULL);
+       iface = SND_CTL_ELEM_IFACE_MIXER;
+       if (strcasecmp(ucm_id, "JackControl") == 0)
+               iface = SND_CTL_ELEM_IFACE_CARD;
+       snd_ctl_elem_id_set_interface(dst, iface);
+       snd_ctl_elem_id_set_name(dst, value);
+       return 0;
+}