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Control API - add TLV support

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snd_ctl_elem_tlv_read
snd_ctl_elem_tlv_write
snd_ctl_elem_tlv_command
snd_ctl_elem_info_is_tlv_readable
snd_ctl_elem_info_is_tlv_writable
snd_ctl_elem_info_is_tlv_commandable
snd_hctl_elem_tlv_read
snd_hctl_elem_tlv_write
snd_hctl_elem_tlv_command
This commit is contained in:
Jaroslav Kysela 2006-07-05 17:42:16 +02:00
parent 408697bfe2
commit c7a0708a23
7 changed files with 248 additions and 4 deletions
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51
src/control/hcontrol.c
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@ -821,7 +821,9 @@ int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value)
* \brief Set value for an HCTL element
* \param elem HCTL element
* \param value HCTL element value
* \return 0 otherwise a negative error code on failure
* \retval 0 on success
* \ratval >1 on success when value was changed
* \retval <0 a negative error code on failure
*/
int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value)
{
@ -832,6 +834,53 @@ int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value)
return snd_ctl_elem_write(elem->hctl->ctl, value);
}
/**
* \brief Get TLV value for an HCTL element
* \param elem HCTL element
* \param tlv TLV array for value
* \param tlv_size size of TLV array in bytes
* \return 0 otherwise a negative error code on failure
*/
int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size)
{
assert(elem);
assert(tlv);
assert(tlv_size >= 12);
return snd_ctl_elem_tlv_read(elem->hctl->ctl, &elem->id, tlv, tlv_size);
}
/**
* \brief Set TLV value for an HCTL element
* \param elem HCTL element
* \param tlv TLV array for value
* \retval 0 on success
* \ratval >1 on success when value was changed
* \retval <0 a negative error code on failure
*/
int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv)
{
assert(elem);
assert(tlv);
assert(tlv[1] >= 4);
return snd_ctl_elem_tlv_write(elem->hctl->ctl, &elem->id, tlv);
}
/**
* \brief Set TLV value for an HCTL element
* \param elem HCTL element
* \param tlv TLV array for value
* \retval 0 on success
* \ratval >1 on success when value was changed
* \retval <0 a negative error code on failure
*/
int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv)
{
assert(elem);
assert(tlv);
assert(tlv[1] >= 4);
return snd_ctl_elem_tlv_command(elem->hctl->ctl, &elem->id, tlv);
}
/**
* \brief Get HCTL handle for an HCTL element
* \param elem HCTL element