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Merge branch 'defer-enum-inspection' of https://github.com/dawagner/tinyalsa into dawagner-defer-enum-inspection

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This commit is contained in:
Taylor Holberton
2016-10-03 21:07:39 -04:00
parent 2bdbdb1fd7 9b42396aa0
commit 6a38d5fa49
1 changed files with 43 additions and 20 deletions
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src/mixer.c
+43 -20
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@@ -109,10 +109,9 @@ void mixer_close(struct mixer *mixer)
struct mixer *mixer_open(unsigned int card)
{
struct snd_ctl_elem_list elist;
struct snd_ctl_elem_info tmp;
struct snd_ctl_elem_id *eid = NULL;
struct mixer *mixer = NULL;
unsigned int n, m;
unsigned int n;
int fd;
char fn[256];
@@ -153,22 +152,6 @@ struct mixer *mixer_open(unsigned int card)
if (ioctl(fd, SNDRV_CTL_IOCTL_ELEM_INFO, ei) < 0)
goto fail;
mixer->ctl[n].mixer = mixer;
if (ei->type == SNDRV_CTL_ELEM_TYPE_ENUMERATED) {
char **enames = calloc(ei->value.enumerated.items, sizeof(char*));
if (!enames)
goto fail;
mixer->ctl[n].ename = enames;
for (m = 0; m < ei->value.enumerated.items; m++) {
memset(&tmp, 0, sizeof(tmp));
tmp.id.numid = ei->id.numid;
tmp.value.enumerated.item = m;
if (ioctl(fd, SNDRV_CTL_IOCTL_ELEM_INFO, &tmp) < 0)
goto fail;
enames[m] = strdup(tmp.value.enumerated.name);
if (!enames[m])
goto fail;
}
}
}
free(eid);
@@ -547,11 +530,50 @@ unsigned int mixer_ctl_get_num_enums(struct mixer_ctl *ctl)
return ctl->info.value.enumerated.items;
}
int mixer_ctl_fill_enum_string(struct mixer_ctl *ctl)
{
struct snd_ctl_elem_info tmp;
unsigned int m;
char **enames;
if (ctl->ename) {
return 0;
}
enames = calloc(ctl->info.value.enumerated.items, sizeof(char*));
if (!enames)
goto fail;
for (m = 0; m < ctl->info.value.enumerated.items; m++) {
memset(&tmp, 0, sizeof(tmp));
tmp.id.numid = ctl->info.id.numid;
tmp.value.enumerated.item = m;
if (ioctl(ctl->mixer->fd, SNDRV_CTL_IOCTL_ELEM_INFO, &tmp) < 0)
goto fail;
enames[m] = strdup(tmp.value.enumerated.name);
if (!enames[m])
goto fail;
}
ctl->ename = enames;
return 0;
fail:
if (enames) {
for (m = 0; m < ctl->info.value.enumerated.items; m++) {
if (enames[m]) {
free(enames[m]);
}
}
free(enames);
}
return -1;
}
const char *mixer_ctl_get_enum_string(struct mixer_ctl *ctl,
unsigned int enum_id)
{
if (!ctl || (ctl->info.type != SNDRV_CTL_ELEM_TYPE_ENUMERATED) ||
(enum_id >= ctl->info.value.enumerated.items))
(enum_id >= ctl->info.value.enumerated.items) ||
mixer_ctl_fill_enum_string(ctl) != 0)
return NULL;
return (const char *)ctl->ename[enum_id];
@@ -563,7 +585,8 @@ int mixer_ctl_set_enum_by_string(struct mixer_ctl *ctl, const char *string)
struct snd_ctl_elem_value ev;
int ret;
if (!ctl || (ctl->info.type != SNDRV_CTL_ELEM_TYPE_ENUMERATED))
if (!ctl || (ctl->info.type != SNDRV_CTL_ELEM_TYPE_ENUMERATED) ||
mixer_ctl_fill_enum_string(ctl) != 0)
return -EINVAL;
num_enums = ctl->info.value.enumerated.items;