diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mixer.c | 67 |
1 files changed, 53 insertions, 14 deletions
diff --git a/src/mixer.c b/src/mixer.c index a45502e..363c590 100644 --- a/src/mixer.c +++ b/src/mixer.c @@ -384,6 +384,10 @@ int mixer_add_new_ctls(struct mixer *mixer) */ const char *mixer_get_name(const struct mixer *mixer) { + if (!mixer) { + return NULL; + } + return (const char *)mixer->card_info.name; } @@ -413,8 +417,9 @@ unsigned int mixer_get_num_ctls_by_name(const struct mixer *mixer, const char *n unsigned int count = 0; struct mixer_ctl *ctl; - if (!mixer) + if (!mixer || !name) { return 0; + } if (mixer->h_grp) { grp = mixer->h_grp; @@ -449,6 +454,10 @@ int mixer_subscribe_events(struct mixer *mixer, int subscribe) { struct mixer_ctl_group *grp; + if (!mixer) { + return -EINVAL; + } + if (mixer->h_grp) { grp = mixer->h_grp; if (grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS, &subscribe) < 0) @@ -479,6 +488,10 @@ int mixer_wait_event(struct mixer *mixer, int timeout) struct mixer_ctl_group *grp; int count = 0, num_fds = 0, i, ret = 0; + if (!mixer) { + return -EINVAL; + } + if (mixer->fd >= 0) num_fds++; @@ -559,6 +572,9 @@ exit: int mixer_consume_event(struct mixer *mixer) { struct mixer_ctl_event ev; + if (!mixer) { + return -EINVAL; + } return mixer_read_event(mixer, &ev); } @@ -684,6 +700,10 @@ struct mixer_ctl *mixer_get_ctl(struct mixer *mixer, unsigned int id) */ struct mixer_ctl *mixer_get_ctl_by_name(struct mixer *mixer, const char *name) { + if (!mixer || !name) { + return NULL; + } + return mixer_get_ctl_by_name_and_index(mixer, name, 0); } @@ -703,8 +723,9 @@ struct mixer_ctl *mixer_get_ctl_by_name_and_index(struct mixer *mixer, unsigned int n; struct mixer_ctl *ctl; - if (!mixer) + if (!mixer || !name) { return NULL; + } if (mixer->h_grp) { grp = mixer->h_grp; @@ -754,6 +775,10 @@ void mixer_ctl_update(struct mixer_ctl *ctl) */ int mixer_ctl_is_access_tlv_rw(const struct mixer_ctl *ctl) { + if (!ctl) { + return 0; + } + return (ctl->info.access & SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE); } @@ -959,8 +984,9 @@ int mixer_ctl_get_array(const struct mixer_ctl *ctl, void *array, size_t count) size_t size; void *source; - if (!ctl || !count || !array) + if (!ctl || !array || count == 0) { return -EINVAL; + } grp = ctl->grp; @@ -1042,8 +1068,9 @@ int mixer_ctl_set_value(struct mixer_ctl *ctl, unsigned int id, int value) struct snd_ctl_elem_value ev; int ret; - if (!ctl || (id >= ctl->info.count)) + if (!ctl || id >= ctl->info.count) { return -EINVAL; + } grp = ctl->grp; memset(&ev, 0, sizeof(ev)); @@ -1098,8 +1125,9 @@ int mixer_ctl_set_array(struct mixer_ctl *ctl, const void *array, size_t count) size_t size; void *dest; - if ((!ctl) || !count || !array) + if (!ctl || !array || count == 0) { return -EINVAL; + } grp = ctl->grp; @@ -1167,8 +1195,9 @@ int mixer_ctl_set_array(struct mixer_ctl *ctl, const void *array, size_t count) */ int mixer_ctl_get_range_min(const struct mixer_ctl *ctl) { - if (!ctl || (ctl->info.type != SNDRV_CTL_ELEM_TYPE_INTEGER)) + if (!ctl || ctl->info.type != SNDRV_CTL_ELEM_TYPE_INTEGER) { return -EINVAL; + } return ctl->info.value.integer.min; } @@ -1183,8 +1212,9 @@ int mixer_ctl_get_range_min(const struct mixer_ctl *ctl) */ int mixer_ctl_get_range_max(const struct mixer_ctl *ctl) { - if (!ctl || (ctl->info.type != SNDRV_CTL_ELEM_TYPE_INTEGER)) + if (!ctl || ctl->info.type != SNDRV_CTL_ELEM_TYPE_INTEGER) { return -EINVAL; + } return ctl->info.value.integer.max; } @@ -1196,13 +1226,14 @@ int mixer_ctl_get_range_max(const struct mixer_ctl *ctl) */ unsigned int mixer_ctl_get_num_enums(const struct mixer_ctl *ctl) { - if (!ctl) + if (!ctl) { return 0; + } return ctl->info.value.enumerated.items; } -int mixer_ctl_fill_enum_string(struct mixer_ctl *ctl) +static int mixer_ctl_fill_enum_string(struct mixer_ctl *ctl) { struct mixer_ctl_group *grp = ctl->grp; struct snd_ctl_elem_info tmp; @@ -1250,10 +1281,14 @@ fail: 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) || - mixer_ctl_fill_enum_string(ctl) != 0) + if (!ctl || ctl->info.type != SNDRV_CTL_ELEM_TYPE_ENUMERATED || + enum_id >= ctl->info.value.enumerated.items) { return NULL; + } + + if (mixer_ctl_fill_enum_string(ctl) < 0) { + return NULL; + } return (const char *)ctl->ename[enum_id]; } @@ -1272,9 +1307,13 @@ 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) || - mixer_ctl_fill_enum_string(ctl) != 0) + if (!ctl || !string || ctl->info.type != SNDRV_CTL_ELEM_TYPE_ENUMERATED) { return -EINVAL; + } + + if (mixer_ctl_fill_enum_string(ctl) < 0) { + return -EINVAL; + } grp = ctl->grp; num_enums = ctl->info.value.enumerated.items; |