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alsa-mixer: extend pa_alsa_mixer_find with the subdevice check

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The full identifier check must be executed for the new melem
creation, otherwise the duplicate control element code check
is reached.

Example (using the snd-aloop driver):

numid=56,iface=PCM,name='PCM Notify',device=1,subdevice=1
numid=62,iface=PCM,name='PCM Notify',device=1,subdevice=2

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/730>
This commit is contained in:
Jaroslav Kysela 2022-06-29 11:23:20 +02:00 • committed by PulseAudio Marge Bot
parent d1675df0cd
commit 81a051089f
1 changed files with 8 additions and 4 deletions
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12
src/modules/alsa/alsa-util.c
View file

@ -1614,7 +1614,8 @@ static snd_mixer_elem_t *pa_alsa_mixer_find(snd_mixer_t *mixer,
snd_ctl_elem_iface_t iface,
const char *name,
unsigned int index,
unsigned int device) {
unsigned int device,
unsigned int subdevice) {
snd_mixer_elem_t *elem;
for (elem = snd_mixer_first_elem(mixer); elem; elem = snd_mixer_elem_next(elem)) {
@ -1631,17 +1632,19 @@ static snd_mixer_elem_t *pa_alsa_mixer_find(snd_mixer_t *mixer,
continue;
if (snd_hctl_elem_get_device(helem) != device)
continue;
if (snd_hctl_elem_get_subdevice(helem) != subdevice)
continue;
return elem;
}
return NULL;
}
snd_mixer_elem_t *pa_alsa_mixer_find_card(snd_mixer_t *mixer, struct pa_alsa_mixer_id *alsa_id, unsigned int device) {
return pa_alsa_mixer_find(mixer, SND_CTL_ELEM_IFACE_CARD, alsa_id->name, alsa_id->index, device);
return pa_alsa_mixer_find(mixer, SND_CTL_ELEM_IFACE_CARD, alsa_id->name, alsa_id->index, device, 0);
}
snd_mixer_elem_t *pa_alsa_mixer_find_pcm(snd_mixer_t *mixer, const char *name, unsigned int device) {
return pa_alsa_mixer_find(mixer, SND_CTL_ELEM_IFACE_PCM, name, 0, device);
return pa_alsa_mixer_find(mixer, SND_CTL_ELEM_IFACE_PCM, name, 0, device, 0);
}
static int mixer_class_compare(const snd_mixer_elem_t *c1, const snd_mixer_elem_t *c2)
@ -1679,10 +1682,11 @@ static int mixer_class_event(snd_mixer_class_t *class, unsigned int mask,
const char *name = snd_hctl_elem_get_name(helem);
const int index = snd_hctl_elem_get_index(helem);
const int device = snd_hctl_elem_get_device(helem);
const int subdevice = snd_hctl_elem_get_subdevice(helem);
snd_mixer_elem_t *new_melem;
bool found = true;
new_melem = pa_alsa_mixer_find(mixer, iface, name, index, device);
new_melem = pa_alsa_mixer_find(mixer, iface, name, index, device, subdevice);
if (!new_melem) {
_helem = pa_xmalloc(sizeof(snd_hctl_elem_t *));
*_helem = helem;