mirror of
https://github.com/alsa-project/alsa-lib.git
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ucm: initial implementation for cdev/cset
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela
parent
c0469e2a28
commit
7d3de218ce
3 changed files with 193 additions and 13 deletions
196
src/ucm/main.c
196
src/ucm/main.c
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@ -38,6 +38,14 @@
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* misc
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*/
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static int get_value1(const char **value, struct list_head *value_list,
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const char *identifier);
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static int get_value3(const char **value,
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const char *identifier,
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struct list_head *value_list1,
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struct list_head *value_list2,
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struct list_head *value_list3);
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static int check_identifier(const char *identifier, const char *prefix)
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{
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int len;
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@ -118,26 +126,140 @@ int snd_use_case_free_list(const char *list[], int items)
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return 0;
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}
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static int open_ctl(snd_use_case_mgr_t *uc_mgr,
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snd_ctl_t **ctl,
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const char *ctl_dev)
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{
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int err;
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/* FIXME: add a list of ctl devices to uc_mgr structure and
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cache accesses for multiple opened ctl devices */
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if (uc_mgr->ctl_dev != NULL && strcmp(ctl_dev, uc_mgr->ctl_dev) == 0) {
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*ctl = uc_mgr->ctl;
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return 0;
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}
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if (uc_mgr->ctl_dev) {
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free(uc_mgr->ctl_dev);
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uc_mgr->ctl_dev = NULL;
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snd_ctl_close(uc_mgr->ctl);
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}
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err = snd_ctl_open(ctl, ctl_dev, 0);
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if (err < 0)
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return err;
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uc_mgr->ctl_dev = strdup(ctl_dev);
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if (uc_mgr->ctl_dev == NULL) {
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snd_ctl_close(*ctl);
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return -ENOMEM;
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}
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uc_mgr->ctl = *ctl;
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return 0;
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}
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static int execute_cset(snd_ctl_t *ctl, char *cset)
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{
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char *pos;
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int err;
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snd_ctl_elem_id_t *id;
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snd_ctl_elem_value_t *value;
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snd_ctl_elem_info_t *info;
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snd_ctl_elem_id_malloc(&id);
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snd_ctl_elem_value_malloc(&value);
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snd_ctl_elem_info_malloc(&info);
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pos = strchr(cset, ' ');
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if (pos == NULL) {
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uc_error("undefined value for cset >%s<", cset);
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return -EINVAL;
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}
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*pos = '\0';
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err = snd_ctl_ascii_elem_id_parse(id, cset);
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if (err < 0)
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goto __fail;
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snd_ctl_elem_value_set_id(value, id);
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snd_ctl_elem_info_set_id(info, id);
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err = snd_ctl_elem_read(ctl, value);
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if (err < 0)
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goto __fail;
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err = snd_ctl_elem_info(ctl, info);
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if (err < 0)
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goto __fail;
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err = snd_ctl_ascii_value_parse(ctl, value, info, pos + 1);
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if (err < 0)
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goto __fail;
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err = snd_ctl_elem_write(ctl, value);
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if (err < 0)
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goto __fail;
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err = 0;
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__fail:
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*pos = ' ';
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return err;
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}
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/**
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* \brief Execute the sequence
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* \param uc_mgr Use case manager
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* \param seq Sequence
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* \return zero on success, otherwise a negative error code
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*/
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static int execute_sequence(snd_use_case_mgr_t *uc_mgr ATTRIBUTE_UNUSED,
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struct list_head *seq)
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static int execute_sequence(snd_use_case_mgr_t *uc_mgr,
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struct list_head *seq,
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struct list_head *value_list1,
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struct list_head *value_list2,
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struct list_head *value_list3)
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{
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struct list_head *pos;
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struct sequence_element *s;
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char *cdev = NULL;
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snd_ctl_t *ctl = NULL;
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int err = 0;
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list_for_each(pos, seq) {
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s = list_entry(pos, struct sequence_element, list);
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switch (s->type) {
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case SEQUENCE_ELEMENT_TYPE_CDEV:
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uc_error("cdev not yet implemented: '%s'", s->data.cdev);
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cdev = strdup(s->data.cdev);
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if (cdev == NULL)
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goto __fail_nomem;
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break;
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case SEQUENCE_ELEMENT_TYPE_CSET:
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uc_error("cset not yet implemented: '%s'", s->data.cset);
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if (cdev == NULL) {
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const char *cdev1 = NULL, *cdev2 = NULL;
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err = get_value3(&cdev1, "PlaybackCTL",
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value_list1,
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value_list2,
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value_list3);
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if (err < 0 && err != ENOENT) {
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uc_error("cdev is not defined!");
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return err;
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}
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err = get_value3(&cdev1, "CaptureCTL",
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value_list1,
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value_list2,
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value_list3);
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if (err < 0 && err != ENOENT) {
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free((char *)cdev1);
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uc_error("cdev is not defined!");
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return err;
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}
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if (cdev1 == NULL || cdev2 == NULL ||
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strcmp(cdev1, cdev2) == 0) {
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cdev = (char *)cdev1;
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free((char *)cdev2);
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} else {
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free((char *)cdev1);
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free((char *)cdev2);
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}
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}
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if (ctl == NULL) {
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err = open_ctl(uc_mgr, &ctl, cdev);
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if (err < 0)
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goto __fail;
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}
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err = execute_cset(ctl, s->data.cset);
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if (err < 0)
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goto __fail;
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break;
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case SEQUENCE_ELEMENT_TYPE_SLEEP:
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usleep(s->data.sleep);
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@ -150,7 +272,14 @@ static int execute_sequence(snd_use_case_mgr_t *uc_mgr ATTRIBUTE_UNUSED,
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break;
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}
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}
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free(cdev);
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return 0;
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__fail_nomem:
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err = -ENOMEM;
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__fail:
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free(cdev);
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return err;
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}
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/**
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@ -165,7 +294,8 @@ static int import_master_config(snd_use_case_mgr_t *uc_mgr)
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err = uc_mgr_import_master_config(uc_mgr);
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if (err < 0)
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return err;
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err = execute_sequence(uc_mgr, &uc_mgr->default_list);
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err = execute_sequence(uc_mgr, &uc_mgr->default_list,
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&uc_mgr->value_list, NULL, NULL);
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if (err < 0)
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uc_error("Unable to execute default sequence");
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return err;
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@ -365,7 +495,10 @@ static int set_verb(snd_use_case_mgr_t *uc_mgr,
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} else {
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seq = &verb->disable_list;
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}
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err = execute_sequence(uc_mgr, seq);
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err = execute_sequence(uc_mgr, seq,
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&verb->value_list,
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&uc_mgr->value_list,
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NULL);
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if (enable && err >= 0)
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uc_mgr->active_verb = verb;
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return err;
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@ -390,7 +523,10 @@ static int set_modifier(snd_use_case_mgr_t *uc_mgr,
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} else {
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seq = &modifier->disable_list;
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}
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err = execute_sequence(uc_mgr, seq);
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err = execute_sequence(uc_mgr, seq,
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&modifier->value_list,
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&uc_mgr->active_verb->value_list,
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&uc_mgr->value_list);
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if (enable && err >= 0) {
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list_add_tail(&modifier->active_list, &uc_mgr->active_modifiers);
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} else if (!enable) {
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@ -418,7 +554,10 @@ static int set_device(snd_use_case_mgr_t *uc_mgr,
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} else {
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seq = &device->disable_list;
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}
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err = execute_sequence(uc_mgr, seq);
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err = execute_sequence(uc_mgr, seq,
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&device->value_list,
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&uc_mgr->active_verb->value_list,
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&uc_mgr->value_list);
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if (enable && err >= 0) {
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list_add_tail(&device->active_list, &uc_mgr->active_devices);
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} else if (!enable) {
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@ -542,7 +681,8 @@ static int dismantle_use_case(snd_use_case_mgr_t *uc_mgr)
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}
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uc_mgr->active_verb = NULL;
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err = execute_sequence(uc_mgr, &uc_mgr->default_list);
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err = execute_sequence(uc_mgr, &uc_mgr->default_list,
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&uc_mgr->value_list, NULL, NULL);
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return err;
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}
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@ -557,7 +697,8 @@ int snd_use_case_mgr_reset(snd_use_case_mgr_t *uc_mgr)
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int err;
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pthread_mutex_lock(&uc_mgr->mutex);
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err = execute_sequence(uc_mgr, &uc_mgr->default_list);
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err = execute_sequence(uc_mgr, &uc_mgr->default_list,
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&uc_mgr->value_list, NULL, NULL);
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INIT_LIST_HEAD(&uc_mgr->active_modifiers);
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INIT_LIST_HEAD(&uc_mgr->active_devices);
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uc_mgr->active_verb = NULL;
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@ -828,6 +969,26 @@ static int get_value1(const char **value, struct list_head *value_list,
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return -ENOENT;
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}
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static int get_value3(const char **value,
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const char *identifier,
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struct list_head *value_list1,
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struct list_head *value_list2,
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struct list_head *value_list3)
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{
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int err;
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err = get_value1(value, value_list1, identifier);
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if (err >= 0 || err != -ENOENT)
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return err;
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err = get_value1(value, value_list2, identifier);
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if (err >= 0 || err != -ENOENT)
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return err;
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err = get_value1(value, value_list3, identifier);
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if (err >= 0 || err != -ENOENT)
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return err;
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return -ENOENT;
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}
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/**
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* \brief Get value
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* \param uc_mgr Use case manager
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@ -1003,7 +1164,10 @@ static int handle_transition_verb(snd_use_case_mgr_t *uc_mgr,
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list_for_each(pos, &uc_mgr->active_verb->transition_list) {
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trans = list_entry(pos, struct transition_sequence, list);
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if (strcmp(trans->name, new_verb->name) == 0) {
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err = execute_sequence(uc_mgr, &trans->transition_list);
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err = execute_sequence(uc_mgr, &trans->transition_list,
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&uc_mgr->active_verb->value_list,
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&uc_mgr->value_list,
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NULL);
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if (err >= 0)
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return 1;
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return err;
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@ -1108,7 +1272,10 @@ static int switch_device(snd_use_case_mgr_t *uc_mgr,
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list_for_each(pos, &xold->transition_list) {
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trans = list_entry(pos, struct transition_sequence, list);
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if (strcmp(trans->name, new_device) == 0) {
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err = execute_sequence(uc_mgr, &trans->transition_list);
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err = execute_sequence(uc_mgr, &trans->transition_list,
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&xold->value_list,
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&uc_mgr->active_verb->value_list,
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&uc_mgr->value_list);
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if (err >= 0) {
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list_del(&xold->active_list);
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list_add_tail(&xnew->active_list, &uc_mgr->active_devices);
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@ -1157,7 +1324,10 @@ static int switch_modifier(snd_use_case_mgr_t *uc_mgr,
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list_for_each(pos, &xold->transition_list) {
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trans = list_entry(pos, struct transition_sequence, list);
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if (strcmp(trans->name, new_modifier) == 0) {
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err = execute_sequence(uc_mgr, &trans->transition_list);
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err = execute_sequence(uc_mgr, &trans->transition_list,
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&xold->value_list,
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&uc_mgr->active_verb->value_list,
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&uc_mgr->value_list);
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if (err >= 0) {
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list_del(&xold->active_list);
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list_add_tail(&xnew->active_list, &uc_mgr->active_modifiers);
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