mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-11-03 09:01:52 -05:00
ucm: implement CardIdByName substitution
The syntax is ${CardIdByName:CARDNAME[#INDEX]}.
The CARDNAME is the ALSA's soundcard name (short form).
The INDEX is the instance (0 = first, 1 = second etc.).
Example: ${CardIdByName:HDA Intel PCH}
(which is identical to ${CardIdByName:HDA Intel PCH#0})
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela
parent
f60e0d5fdc
commit
eee879d381
6 changed files with 135 additions and 56 deletions
110
src/ucm/utils.c
110
src/ucm/utils.c
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@ -49,26 +49,73 @@ void uc_mgr_stdout(const char *fmt,...)
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va_end(va);
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}
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struct ctl_list *uc_mgr_get_one_ctl(snd_use_case_mgr_t *uc_mgr)
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struct ctl_list *uc_mgr_get_master_ctl(snd_use_case_mgr_t *uc_mgr)
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{
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struct list_head *pos;
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struct ctl_list *ctl_list = NULL;
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struct ctl_list *ctl_list = NULL, *ctl_list2;
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list_for_each(pos, &uc_mgr->ctl_list) {
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ctl_list2 = list_entry(pos, struct ctl_list, list);
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if (ctl_list2->slave)
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continue;
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if (ctl_list) {
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uc_error("multiple control device names were found!");
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return NULL;
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}
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ctl_list = list_entry(pos, struct ctl_list, list);
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ctl_list = ctl_list2;
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}
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return ctl_list;
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}
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struct ctl_list *uc_mgr_get_ctl_by_name(snd_use_case_mgr_t *uc_mgr, const char *name, int idx)
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{
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struct list_head *pos;
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struct ctl_list *ctl_list = NULL;
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const char *s;
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char cname[32];
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int idx2, card, err;
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idx2 = idx;
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list_for_each(pos, &uc_mgr->ctl_list) {
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ctl_list = list_entry(pos, struct ctl_list, list);
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s = snd_ctl_card_info_get_name(ctl_list->ctl_info);
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if (s == NULL)
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continue;
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if (strcmp(s, name) == 0) {
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if (idx2 == 0)
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return ctl_list;
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idx2--;
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}
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}
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idx2 = idx;
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card = -1;
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if (snd_card_next(&card) < 0 || card < 0)
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return NULL;
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while (card >= 0) {
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sprintf(cname, "hw:%d", card);
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err = uc_mgr_open_ctl(uc_mgr, &ctl_list, cname, 1);
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if (err < 0)
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continue; /* really? */
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s = snd_ctl_card_info_get_name(ctl_list->ctl_info);
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if (s && strcmp(s, name) == 0) {
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if (idx2 == 0)
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return ctl_list;
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idx2--;
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}
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if (snd_card_next(&card) < 0)
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break;
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}
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return NULL;
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}
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snd_ctl_t *uc_mgr_get_ctl(snd_use_case_mgr_t *uc_mgr)
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{
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struct ctl_list *ctl_list;
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ctl_list = uc_mgr_get_one_ctl(uc_mgr);
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ctl_list = uc_mgr_get_master_ctl(uc_mgr);
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if (ctl_list)
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return ctl_list->ctl;
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return NULL;
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@ -127,10 +174,11 @@ static int uc_mgr_ctl_add_dev(struct ctl_list *ctl_list, const char *device)
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}
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static int uc_mgr_ctl_add(snd_use_case_mgr_t *uc_mgr,
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struct ctl_list *ctl_list,
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struct ctl_list **ctl_list,
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snd_ctl_t *ctl, int card,
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snd_ctl_card_info_t *info,
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const char *device)
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const char *device,
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int slave)
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{
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struct ctl_list *cl = NULL;
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const char *id = snd_ctl_card_info_get_id(info);
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@ -139,7 +187,7 @@ static int uc_mgr_ctl_add(snd_use_case_mgr_t *uc_mgr,
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if (id == NULL || id[0] == '\0')
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return -ENOENT;
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if (!ctl_list) {
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if (!(*ctl_list)) {
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cl = malloc(sizeof(*cl));
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if (cl == NULL)
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return -ENOMEM;
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@ -150,41 +198,49 @@ static int uc_mgr_ctl_add(snd_use_case_mgr_t *uc_mgr,
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return -ENOMEM;
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}
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snd_ctl_card_info_copy(cl->ctl_info, info);
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ctl_list = cl;
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cl->slave = slave;
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*ctl_list = cl;
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} else {
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if (!slave)
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(*ctl_list)->slave = slave;
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}
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if (card >= 0) {
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snprintf(dev, sizeof(dev), "hw:%d", card);
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hit |= !!(device && (strcmp(dev, device) == 0));
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err = uc_mgr_ctl_add_dev(ctl_list, dev);
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err = uc_mgr_ctl_add_dev(*ctl_list, dev);
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if (err < 0)
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goto __nomem;
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}
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snprintf(dev, sizeof(dev), "hw:%s", id);
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hit |= !!(device && (strcmp(dev, device) == 0));
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err = uc_mgr_ctl_add_dev(ctl_list, dev);
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err = uc_mgr_ctl_add_dev(*ctl_list, dev);
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if (err < 0)
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goto __nomem;
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/* the UCM name not based on the card name / id */
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if (!hit && device) {
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err = uc_mgr_ctl_add_dev(ctl_list, device);
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err = uc_mgr_ctl_add_dev(*ctl_list, device);
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if (err < 0)
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goto __nomem;
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}
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list_add_tail(&ctl_list->list, &uc_mgr->ctl_list);
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list_add_tail(&(*ctl_list)->list, &uc_mgr->ctl_list);
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return 0;
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__nomem:
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if (ctl_list == cl)
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if (*ctl_list == cl) {
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uc_mgr_free_ctl(cl);
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*ctl_list = NULL;
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}
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return -ENOMEM;
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}
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int uc_mgr_open_ctl(snd_use_case_mgr_t *uc_mgr,
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snd_ctl_t **ctl,
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const char *device)
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struct ctl_list **ctll,
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const char *device,
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int slave)
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{
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struct list_head *pos1, *pos2;
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snd_ctl_t *ctl;
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struct ctl_list *ctl_list;
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struct ctl_dev *ctl_dev;
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snd_ctl_card_info_t *info;
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@ -199,24 +255,25 @@ int uc_mgr_open_ctl(snd_use_case_mgr_t *uc_mgr,
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list_for_each(pos2, &ctl_list->dev_list) {
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ctl_dev = list_entry(pos2, struct ctl_dev, list);
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if (strcmp(ctl_dev->device, device) == 0) {
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*ctl = ctl_list->ctl;
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*ctll = ctl_list;
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if (!slave)
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ctl_list->slave = 0;
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return 0;
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}
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}
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}
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err = snd_ctl_open(ctl, device, 0);
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err = snd_ctl_open(&ctl, device, 0);
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if (err < 0)
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return err;
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id = NULL;
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err = snd_ctl_card_info(*ctl, info);
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err = snd_ctl_card_info(ctl, info);
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if (err == 0)
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id = snd_ctl_card_info_get_id(info);
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if (err < 0 || id == NULL || id[0] == '\0') {
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uc_error("control hardware info (%s): %s", device, snd_strerror(err));
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snd_ctl_close(*ctl);
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*ctl = NULL;
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snd_ctl_close(ctl);
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return err;
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}
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@ -225,24 +282,25 @@ int uc_mgr_open_ctl(snd_use_case_mgr_t *uc_mgr,
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ctl_list = list_entry(pos1, struct ctl_list, list);
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if (strcmp(id, snd_ctl_card_info_get_id(ctl_list->ctl_info)) == 0) {
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card = snd_card_get_index(id);
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err = uc_mgr_ctl_add(uc_mgr, ctl_list, *ctl, card, info, device);
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err = uc_mgr_ctl_add(uc_mgr, &ctl_list, ctl, card, info, device, slave);
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if (err < 0)
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goto __nomem;
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snd_ctl_close(*ctl);
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*ctl = ctl_list->ctl;
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snd_ctl_close(ctl);
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*ctll = ctl_list;
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return 0;
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}
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}
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err = uc_mgr_ctl_add(uc_mgr, NULL, *ctl, -1, info, device);
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ctl_list = NULL;
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err = uc_mgr_ctl_add(uc_mgr, &ctl_list, ctl, -1, info, device, slave);
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if (err < 0)
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goto __nomem;
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*ctll = ctl_list;
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return 0;
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__nomem:
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snd_ctl_close(*ctl);
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*ctl = NULL;
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snd_ctl_close(ctl);
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return -ENOMEM;
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}
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