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alsa-pcm: add basic bind-ctl write functionality

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This commit is contained in:
Stefan Ursella 2024-06-28 09:55:24 +00:00
parent ec521ca870
commit 0b39c4ec68
1 changed files with 63 additions and 1 deletions
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64
spa/plugins/alsa/alsa-pcm.c
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@ -91,6 +91,66 @@ static void release_card(struct card *c)
free(c); free(c);
} }
#define CHECK(s,msg,...) if ((err = (s)) < 0) { spa_log_error(state->log, msg ": %s", ##__VA_ARGS__, snd_strerror(err)); return err; }
static int write_bind_ctl_param(struct state *state, const char *name, const char *param) {
int err;
unsigned int count, idx;
char _name[1024];
for (unsigned int i = 0; i < state->num_bind_ctls; i++) {
snd_ctl_elem_info_t *info = state->bound_ctls[i].info;
bool changed = false;
bool is_array;
int type;
struct spa_pod_builder *builder;
if(!state->bound_ctls[i].value || !info)
continue;
snprintf(_name, sizeof(_name), "api.alsa.bind-ctl.%s",
snd_ctl_elem_info_get_name(info));
if (!spa_streq(name, _name))
continue;
type = snd_ctl_elem_info_get_type(info);
count = snd_ctl_elem_info_get_count(info);
switch (type) {
case SND_CTL_ELEM_TYPE_BOOLEAN: {
bool b = spa_atob(param);
for (idx = 0; idx < count; idx++)
snd_ctl_elem_value_set_boolean(state->bound_ctls[i].value, idx, b);
changed = true;
}
break;
case SND_CTL_ELEM_TYPE_INTEGER: {
long l = (long) atoi(param);
for (idx = 0; idx < count; idx++)
snd_ctl_elem_value_set_integer(state->bound_ctls[i].value, idx, l);
changed = true;
}
break;
default:
spa_log_warn(state->log, "%s ctl '%s' not supported",
snd_ctl_elem_type_name(snd_ctl_elem_info_get_type(info)),
snd_ctl_elem_info_get_name(info));
break;
}
if(changed)
CHECK(snd_ctl_elem_write(state->ctl, state->bound_ctls[i].value), "snd_ctl_elem_write");
return 0;
}
return 0;
}
static int alsa_set_param(struct state *state, const char *k, const char *s) static int alsa_set_param(struct state *state, const char *k, const char *s)
{ {
int fmt_change = 0; int fmt_change = 0;
@ -144,6 +204,9 @@ static int alsa_set_param(struct state *state, const char *k, const char *s)
} else if (spa_streq(k, "clock.name")) { } else if (spa_streq(k, "clock.name")) {
spa_scnprintf(state->clock_name, spa_scnprintf(state->clock_name,
sizeof(state->clock_name), "%s", s); sizeof(state->clock_name), "%s", s);
} else if (spa_strstartswith(k, "api.alsa.bind-ctl.")) {
write_bind_ctl_param(state, k, s);
fmt_change++;
} else } else
return 0; return 0;
@ -628,7 +691,6 @@ int spa_alsa_parse_prop_params(struct state *state, struct spa_pod *params)
return changed; return changed;
} }
#define CHECK(s,msg,...) if ((err = (s)) < 0) { spa_log_error(state->log, msg ": %s", ##__VA_ARGS__, snd_strerror(err)); return err; }
static ssize_t log_write(void *cookie, const char *buf, size_t size) static ssize_t log_write(void *cookie, const char *buf, size_t size)
{ {