int err;
snd_mixer_t *m;
pa_alsa_mixer *pm;
+ char *dev2;
+ void *state;
pa_assert(mixers);
pa_assert(dev);
pm = pa_hashmap_get(mixers, dev);
+
+ /* The quick card number/index lookup (hw:#)
+ * We already know the card number/index, thus use the mixer
+ * from the cache at first.
+ */
+ if (!pm && pa_strneq(dev, "hw:", 3)) {
+ const char *s = dev + 3;
+ int card_index;
+ while (*s && *s >= 0 && *s <= '9') s++;
+ if (*s == '\0' && pa_atoi(dev + 3, &card_index) >= 0) {
+ PA_HASHMAP_FOREACH_KV(dev2, pm, mixers, state) {
+ if (pm->card_index == card_index) {
+ dev = dev2;
+ pm = pa_hashmap_get(mixers, dev);
+ break;
+ }
+ }
+ }
+ }
+
if (pm) {
if (!probe)
pm->used_for_probe_only = false;
if (prepare_mixer(m, dev) >= 0) {
pm = pa_xnew0(pa_alsa_mixer, 1);
if (pm) {
+ snd_hctl_t *hctl;
+ pm->card_index = -1;
+ /* determine the ALSA card number (index) and store it to card_index */
+ err = snd_mixer_get_hctl(m, dev, &hctl);
+ if (err >= 0) {
+ snd_ctl_card_info_t *info;
+ snd_ctl_card_info_alloca(&info);
+ err = snd_ctl_card_info(snd_hctl_ctl(hctl), info);
+ if (err >= 0)
+ pm->card_index = snd_ctl_card_info_get_card(info);
+ }
pm->used_for_probe_only = probe;
pm->mixer_handle = m;
pa_hashmap_put(mixers, pa_xstrdup(dev), pm);