diff options
| author | Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com> | 2017-01-09 12:23:14 +0530 |
|---|---|---|
| committer | Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com> | 2017-01-10 13:50:39 +0530 |
| commit | 9698d03a63b89fd5a2a2d775bcfc542812da54d9 (patch) | |
| tree | 1ed0f01a9fb9506a3497675c7f3dcb6f472b0552 | |
| parent | c848ea519f5c63b5a59bf2643e02a99ac7a7eef7 (diff) | |
mixer: Add support for TLV RW access check api
Tinyalsa doesn't expose an api to check TLV RW access
Add mixer_ctl_is_access_tlv_rw().
This api will get used by tinymix and audio HALs for checking TLV RW
access before managing the byte related mixer controls.
Change-Id: Ib5707fabf479de638e1c7abd4cd149e7637ff9c2
Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>
| -rw-r--r-- | include/tinyalsa/mixer.h | 2 | ||||
| -rw-r--r-- | src/mixer.c | 15 |
2 files changed, 15 insertions, 2 deletions
diff --git a/include/tinyalsa/mixer.h b/include/tinyalsa/mixer.h index d82d4b1..b9d6cf3 100644 --- a/include/tinyalsa/mixer.h +++ b/include/tinyalsa/mixer.h @@ -107,6 +107,8 @@ const char *mixer_ctl_get_enum_string(struct mixer_ctl *ctl, unsigned int enum_i */ void mixer_ctl_update(struct mixer_ctl *ctl); +int mixer_ctl_is_access_tlv_rw(const struct mixer_ctl *ctl); + /* Set and get mixer controls */ int mixer_ctl_get_percent(const struct mixer_ctl *ctl, unsigned int id); diff --git a/src/mixer.c b/src/mixer.c index 66881e9..daa04f7 100644 --- a/src/mixer.c +++ b/src/mixer.c @@ -381,6 +381,17 @@ void mixer_ctl_update(struct mixer_ctl *ctl) ioctl(ctl->mixer->fd, SNDRV_CTL_IOCTL_ELEM_INFO, ctl->info); } +/** Checks the control for TLV Read/Write access. + * @param ctl An initialized control handle. + * @returns On success, non-zero. + * On failure, zero. + * @ingroup libtinyalsa-mixer + */ +int mixer_ctl_is_access_tlv_rw(const struct mixer_ctl *ctl) +{ + return (ctl->info.access & SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE); +} + /** Gets the control's ID. * @param ctl An initialized control handle. * @returns On success, the control's ID is returned. @@ -598,7 +609,7 @@ int mixer_ctl_get_array(const struct mixer_ctl *ctl, void *array, size_t count) case SNDRV_CTL_ELEM_TYPE_BYTES: /* check if this is new bytes TLV */ - if (ctl->info.access & SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE) { + if (mixer_ctl_is_access_tlv_rw(ctl)) { struct snd_ctl_tlv *tlv; int ret; @@ -719,7 +730,7 @@ int mixer_ctl_set_array(struct mixer_ctl *ctl, const void *array, size_t count) case SNDRV_CTL_ELEM_TYPE_BYTES: /* check if this is new bytes TLV */ - if (ctl->info.access & SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE) { + if (mixer_ctl_is_access_tlv_rw(ctl)) { struct snd_ctl_tlv *tlv; int ret = 0; if (count > SIZE_MAX - sizeof(*tlv)) |