mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-11-03 09:01:52 -05:00
5c71dd3ee7
Added the dB range information to PCM softvol plugin. Also, fixed the coefficient table to match with the accurate dB step 0.20dB.
2589 lines
65 KiB
C
2589 lines
65 KiB
C
/**
|
|
* \file control/control.c
|
|
* \brief CTL interface - primitive controls
|
|
* \author Abramo Bagnara <abramo@alsa-project.org>
|
|
* \date 2000
|
|
*
|
|
* CTL interface is designed to access primitive controls.
|
|
* See \ref control page for more details.
|
|
*/
|
|
/*
|
|
* Control Interface - main file
|
|
* Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
|
|
*
|
|
*
|
|
* This library is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as
|
|
* published by the Free Software Foundation; either version 2.1 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
/*! \page control Control interface
|
|
|
|
<P>Control interface is designed to access primitive controls. There is
|
|
also interface notifying about control and structure changes.
|
|
|
|
\section control_general_overview General overview
|
|
|
|
The primitive controls can be integer, boolean, enumerators, bytes
|
|
and IEC958 structure.
|
|
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <signal.h>
|
|
#include <dlfcn.h>
|
|
#include <sys/poll.h>
|
|
#include "control_local.h"
|
|
|
|
/**
|
|
* \brief get identifier of CTL handle
|
|
* \param ctl CTL handle
|
|
* \return ascii identifier of CTL handle
|
|
*
|
|
* Returns the ASCII identifier of given CTL handle. It's the same
|
|
* identifier specified in snd_ctl_open().
|
|
*/
|
|
const char *snd_ctl_name(snd_ctl_t *ctl)
|
|
{
|
|
assert(ctl);
|
|
return ctl->name;
|
|
}
|
|
|
|
/**
|
|
* \brief get type of CTL handle
|
|
* \param ctl CTL handle
|
|
* \return type of CTL handle
|
|
*
|
|
* Returns the type #snd_ctl_type_t of given CTL handle.
|
|
*/
|
|
snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl)
|
|
{
|
|
assert(ctl);
|
|
return ctl->type;
|
|
}
|
|
|
|
/**
|
|
* \brief close CTL handle
|
|
* \param ctl CTL handle
|
|
* \return 0 on success otherwise a negative error code
|
|
*
|
|
* Closes the specified CTL handle and frees all associated
|
|
* resources.
|
|
*/
|
|
int snd_ctl_close(snd_ctl_t *ctl)
|
|
{
|
|
int err;
|
|
while (!list_empty(&ctl->async_handlers)) {
|
|
snd_async_handler_t *h = list_entry(&ctl->async_handlers.next, snd_async_handler_t, hlist);
|
|
snd_async_del_handler(h);
|
|
}
|
|
err = ctl->ops->close(ctl);
|
|
free(ctl->name);
|
|
if (ctl->dl_handle)
|
|
snd_dlclose(ctl->dl_handle);
|
|
free(ctl);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* \brief set nonblock mode
|
|
* \param ctl CTL handle
|
|
* \param nonblock 0 = block, 1 = nonblock mode
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock)
|
|
{
|
|
int err;
|
|
assert(ctl);
|
|
err = ctl->ops->nonblock(ctl, nonblock);
|
|
if (err < 0)
|
|
return err;
|
|
ctl->nonblock = nonblock;
|
|
return 0;
|
|
}
|
|
|
|
#ifndef DOC_HIDDEN
|
|
int snd_ctl_new(snd_ctl_t **ctlp, snd_ctl_type_t type, const char *name)
|
|
{
|
|
snd_ctl_t *ctl;
|
|
ctl = calloc(1, sizeof(*ctl));
|
|
if (!ctl)
|
|
return -ENOMEM;
|
|
ctl->type = type;
|
|
if (name)
|
|
ctl->name = strdup(name);
|
|
INIT_LIST_HEAD(&ctl->async_handlers);
|
|
*ctlp = ctl;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* \brief set async mode
|
|
* \param ctl CTL handle
|
|
* \param sig Signal to raise: < 0 disable, 0 default (SIGIO)
|
|
* \param pid Process ID to signal: 0 current
|
|
* \return 0 on success otherwise a negative error code
|
|
*
|
|
* A signal is raised when a change happens.
|
|
*/
|
|
int snd_ctl_async(snd_ctl_t *ctl, int sig, pid_t pid)
|
|
{
|
|
assert(ctl);
|
|
if (sig == 0)
|
|
sig = SIGIO;
|
|
if (pid == 0)
|
|
pid = getpid();
|
|
return ctl->ops->async(ctl, sig, pid);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* \brief get count of poll descriptors for CTL handle
|
|
* \param ctl CTL handle
|
|
* \return count of poll descriptors
|
|
*/
|
|
int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl)
|
|
{
|
|
assert(ctl);
|
|
if (ctl->ops->poll_descriptors_count)
|
|
return ctl->ops->poll_descriptors_count(ctl);
|
|
if (ctl->poll_fd < 0)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* \brief get poll descriptors
|
|
* \param ctl CTL handle
|
|
* \param pfds array of poll descriptors
|
|
* \param space space in the poll descriptor array
|
|
* \return count of filled descriptors
|
|
*/
|
|
int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space)
|
|
{
|
|
assert(ctl && pfds);
|
|
if (ctl->ops->poll_descriptors)
|
|
return ctl->ops->poll_descriptors(ctl, pfds, space);
|
|
if (ctl->poll_fd < 0)
|
|
return 0;
|
|
if (space > 0) {
|
|
pfds->fd = ctl->poll_fd;
|
|
pfds->events = POLLIN|POLLERR|POLLNVAL;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief get returned events from poll descriptors
|
|
* \param ctl CTL handle
|
|
* \param pfds array of poll descriptors
|
|
* \param nfds count of poll descriptors
|
|
* \param revents returned events
|
|
* \return zero if success, otherwise a negative error code
|
|
*/
|
|
int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
|
|
{
|
|
assert(ctl && pfds && revents);
|
|
if (ctl->ops->poll_revents)
|
|
return ctl->ops->poll_revents(ctl, pfds, nfds, revents);
|
|
if (nfds == 1) {
|
|
*revents = pfds->revents;
|
|
return 0;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
/**
|
|
* \brief Ask to be informed about events (poll, #snd_ctl_async, #snd_ctl_read)
|
|
* \param ctl CTL handle
|
|
* \param subscribe 0 = unsubscribe, 1 = subscribe
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe)
|
|
{
|
|
assert(ctl);
|
|
return ctl->ops->subscribe_events(ctl, subscribe);
|
|
}
|
|
|
|
|
|
/**
|
|
* \brief Get card related information
|
|
* \param ctl CTL handle
|
|
* \param info Card info pointer
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info)
|
|
{
|
|
assert(ctl && info);
|
|
return ctl->ops->card_info(ctl, info);
|
|
}
|
|
|
|
/**
|
|
* \brief Get a list of element identifiers
|
|
* \param ctl CTL handle
|
|
* \param list CTL element identifiers list pointer
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list)
|
|
{
|
|
assert(ctl && list);
|
|
assert(list->space == 0 || list->pids);
|
|
return ctl->ops->element_list(ctl, list);
|
|
}
|
|
|
|
/**
|
|
* \brief Get CTL element information
|
|
* \param ctl CTL handle
|
|
* \param info CTL element id/information pointer
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info)
|
|
{
|
|
assert(ctl && info && (info->id.name[0] || info->id.numid));
|
|
return ctl->ops->element_info(ctl, info);
|
|
}
|
|
|
|
/**
|
|
* \brief Create and add an user INTEGER CTL element
|
|
* \param ctl CTL handle
|
|
* \param id CTL element id to add
|
|
* \param count number of elements
|
|
* \param min minimum value
|
|
* \param max maximum value
|
|
* \param step value step
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_elem_add_integer(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
|
|
unsigned int count, long min, long max, long step)
|
|
{
|
|
snd_ctl_elem_info_t *info;
|
|
snd_ctl_elem_value_t *val;
|
|
unsigned int i;
|
|
int err;
|
|
|
|
assert(ctl && id && id->name[0]);
|
|
snd_ctl_elem_info_alloca(&info);
|
|
info->id = *id;
|
|
info->type = SND_CTL_ELEM_TYPE_INTEGER;
|
|
info->access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
|
|
SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE;
|
|
info->count = count;
|
|
info->value.integer.min = min;
|
|
info->value.integer.max = max;
|
|
info->value.integer.step = step;
|
|
err = ctl->ops->element_add(ctl, info);
|
|
if (err < 0)
|
|
return err;
|
|
snd_ctl_elem_value_alloca(&val);
|
|
val->id = *id;
|
|
for (i = 0; i < count; i++)
|
|
val->value.integer.value[i] = min;
|
|
err = ctl->ops->element_write(ctl, val);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* \brief Create and add an user INTEGER64 CTL element
|
|
* \param ctl CTL handle
|
|
* \param id CTL element id to add
|
|
* \param count number of elements
|
|
* \param min minimum value
|
|
* \param max maximum value
|
|
* \param step value step
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_elem_add_integer64(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
|
|
unsigned int count, long long min, long long max,
|
|
long long step)
|
|
{
|
|
snd_ctl_elem_info_t *info;
|
|
snd_ctl_elem_value_t *val;
|
|
unsigned int i;
|
|
int err;
|
|
|
|
assert(ctl && id && id->name[0]);
|
|
snd_ctl_elem_info_alloca(&info);
|
|
info->id = *id;
|
|
info->type = SND_CTL_ELEM_TYPE_INTEGER64;
|
|
info->count = count;
|
|
info->value.integer64.min = min;
|
|
info->value.integer64.max = max;
|
|
info->value.integer64.step = step;
|
|
err = ctl->ops->element_add(ctl, info);
|
|
if (err < 0)
|
|
return err;
|
|
snd_ctl_elem_value_alloca(&val);
|
|
val->id = *id;
|
|
for (i = 0; i < count; i++)
|
|
val->value.integer64.value[i] = min;
|
|
err = ctl->ops->element_write(ctl, val);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* \brief Create and add an user BOOLEAN CTL element
|
|
* \param ctl CTL handle
|
|
* \param id CTL element id to add
|
|
* \param count number of elements
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
|
|
unsigned int count)
|
|
{
|
|
snd_ctl_elem_info_t *info;
|
|
|
|
assert(ctl && id && id->name[0]);
|
|
snd_ctl_elem_info_alloca(&info);
|
|
info->id = *id;
|
|
info->type = SND_CTL_ELEM_TYPE_BOOLEAN;
|
|
info->count = count;
|
|
info->value.integer.min = 0;
|
|
info->value.integer.max = 1;
|
|
return ctl->ops->element_add(ctl, info);
|
|
}
|
|
|
|
/**
|
|
* \brief Create and add an user IEC958 CTL element
|
|
* \param ctl CTL handle
|
|
* \param id CTL element info to add
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id)
|
|
{
|
|
snd_ctl_elem_info_t *info;
|
|
|
|
assert(ctl && id && id->name[0]);
|
|
snd_ctl_elem_info_alloca(&info);
|
|
info->id = *id;
|
|
info->type = SND_CTL_ELEM_TYPE_IEC958;
|
|
info->count = 1;
|
|
return ctl->ops->element_add(ctl, info);
|
|
}
|
|
|
|
/**
|
|
* \brief Remove an user CTL element
|
|
* \param ctl CTL handle
|
|
* \param id CTL element identification
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
|
|
{
|
|
assert(ctl && id && (id->name[0] || id->numid));
|
|
return ctl->ops->element_remove(ctl, id);
|
|
}
|
|
|
|
/**
|
|
* \brief Get CTL element value
|
|
* \param ctl CTL handle
|
|
* \param control CTL element id/value pointer
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *control)
|
|
{
|
|
assert(ctl && control && (control->id.name[0] || control->id.numid));
|
|
return ctl->ops->element_read(ctl, control);
|
|
}
|
|
|
|
/**
|
|
* \brief Set CTL element value
|
|
* \param ctl CTL handle
|
|
* \param control CTL element id/value pointer
|
|
* \retval 0 on success
|
|
* \retval >0 on success when value was changed
|
|
* \retval <0 a negative error code
|
|
*/
|
|
int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *control)
|
|
{
|
|
assert(ctl && control && (control->id.name[0] || control->id.numid));
|
|
return ctl->ops->element_write(ctl, control);
|
|
}
|
|
|
|
static int snd_ctl_tlv_do(snd_ctl_t *ctl, int op_flag,
|
|
const snd_ctl_elem_id_t *id,
|
|
unsigned int *tlv, unsigned int tlv_size)
|
|
{
|
|
snd_ctl_elem_info_t *info = NULL;
|
|
int err;
|
|
|
|
if (id->numid == 0) {
|
|
info = calloc(1, sizeof(*info));
|
|
if (info == NULL)
|
|
return -ENOMEM;
|
|
info->id = *id;
|
|
id = &info->id;
|
|
err = snd_ctl_elem_info(ctl, info);
|
|
if (err < 0)
|
|
goto __err;
|
|
if (id->numid == 0) {
|
|
err = -ENOENT;
|
|
goto __err;
|
|
}
|
|
}
|
|
err = ctl->ops->element_tlv(ctl, op_flag, id->numid, tlv, tlv_size);
|
|
__err:
|
|
if (info)
|
|
free(info);
|
|
return err;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* \brief Get CTL element TLV value
|
|
* \param ctl CTL handle
|
|
* \param id CTL element id pointer
|
|
* \param tlv TLV array pointer to store
|
|
* \param tlv_size TLV array size in bytes
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_elem_tlv_read(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
|
|
unsigned int *tlv, unsigned int tlv_size)
|
|
{
|
|
int err;
|
|
assert(ctl && id && (id->name[0] || id->numid) && tlv);
|
|
if (tlv_size < 2 * sizeof(int))
|
|
return -EINVAL;
|
|
/* 1.0.12 driver doesn't return the error even if the user TLV
|
|
* is empty. So, initialize TLV here with an invalid type
|
|
* and compare the returned value after ioctl for checking
|
|
* the validity of TLV.
|
|
*/
|
|
tlv[0] = -1;
|
|
tlv[1] = 0;
|
|
err = snd_ctl_tlv_do(ctl, 0, id, tlv, tlv_size);
|
|
if (err >= 0 && tlv[0] == -1)
|
|
err = -ENXIO;
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* \brief Set CTL element TLV value
|
|
* \param ctl CTL handle
|
|
* \param id CTL element id pointer
|
|
* \param tlv TLV array pointer to store
|
|
* \retval 0 on success
|
|
* \retval >0 on success when value was changed
|
|
* \retval <0 a negative error code
|
|
*/
|
|
int snd_ctl_elem_tlv_write(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
|
|
const unsigned int *tlv)
|
|
{
|
|
assert(ctl && id && (id->name[0] || id->numid) && tlv);
|
|
return snd_ctl_tlv_do(ctl, 1, id, (unsigned int *)tlv, tlv[1] + 2 * sizeof(unsigned int));
|
|
}
|
|
|
|
/**
|
|
* \brief Process CTL element TLV command
|
|
* \param ctl CTL handle
|
|
* \param id CTL element id pointer
|
|
* \param tlv TLV array pointer to process
|
|
* \retval 0 on success
|
|
* \retval >0 on success when value was changed
|
|
* \retval <0 a negative error code
|
|
*/
|
|
int snd_ctl_elem_tlv_command(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
|
|
const unsigned int *tlv)
|
|
{
|
|
assert(ctl && id && (id->name[0] || id->numid) && tlv);
|
|
return snd_ctl_tlv_do(ctl, -1, id, (unsigned int *)tlv, tlv[1] + 2 * sizeof(unsigned int));
|
|
}
|
|
|
|
/**
|
|
* \brief Lock CTL element
|
|
* \param ctl CTL handle
|
|
* \param id CTL element id pointer
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
|
|
{
|
|
assert(ctl && id);
|
|
return ctl->ops->element_lock(ctl, id);
|
|
}
|
|
|
|
/**
|
|
* \brief Unlock CTL element
|
|
* \param ctl CTL handle
|
|
* \param id CTL element id pointer
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
|
|
{
|
|
assert(ctl && id);
|
|
return ctl->ops->element_unlock(ctl, id);
|
|
}
|
|
|
|
/**
|
|
* \brief Get next hardware dependent device number
|
|
* \param ctl CTL handle
|
|
* \param device current device on entry and next device on return
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int *device)
|
|
{
|
|
assert(ctl && device);
|
|
return ctl->ops->hwdep_next_device(ctl, device);
|
|
}
|
|
|
|
/**
|
|
* \brief Get info about a hardware dependent device
|
|
* \param ctl CTL handle
|
|
* \param info Hardware dependent device id/info pointer
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t * info)
|
|
{
|
|
assert(ctl && info);
|
|
return ctl->ops->hwdep_info(ctl, info);
|
|
}
|
|
|
|
/**
|
|
* \brief Get next PCM device number
|
|
* \param ctl CTL handle
|
|
* \param device current device on entry and next device on return
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int * device)
|
|
{
|
|
assert(ctl && device);
|
|
return ctl->ops->pcm_next_device(ctl, device);
|
|
}
|
|
|
|
/**
|
|
* \brief Get info about a PCM device
|
|
* \param ctl CTL handle
|
|
* \param info PCM device id/info pointer
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info)
|
|
{
|
|
assert(ctl && info);
|
|
return ctl->ops->pcm_info(ctl, info);
|
|
}
|
|
|
|
/**
|
|
* \brief Set preferred PCM subdevice number of successive PCM open
|
|
* \param ctl CTL handle
|
|
* \param subdev Preferred PCM subdevice number
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev)
|
|
{
|
|
assert(ctl);
|
|
return ctl->ops->pcm_prefer_subdevice(ctl, subdev);
|
|
}
|
|
|
|
/**
|
|
* \brief Get next RawMidi device number
|
|
* \param ctl CTL handle
|
|
* \param device current device on entry and next device on return
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device)
|
|
{
|
|
assert(ctl && device);
|
|
return ctl->ops->rawmidi_next_device(ctl, device);
|
|
}
|
|
|
|
/**
|
|
* \brief Get info about a RawMidi device
|
|
* \param ctl CTL handle
|
|
* \param info RawMidi device id/info pointer
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t * info)
|
|
{
|
|
assert(ctl && info);
|
|
return ctl->ops->rawmidi_info(ctl, info);
|
|
}
|
|
|
|
/**
|
|
* \brief Set preferred RawMidi subdevice number of successive RawMidi open
|
|
* \param ctl CTL handle
|
|
* \param subdev Preferred RawMidi subdevice number
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev)
|
|
{
|
|
assert(ctl);
|
|
return ctl->ops->rawmidi_prefer_subdevice(ctl, subdev);
|
|
}
|
|
|
|
/**
|
|
* \brief Set Power State to given SND_CTL_POWER_* value and do the power management
|
|
* \param ctl CTL handle
|
|
* \param state Desired Power State
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state)
|
|
{
|
|
assert(ctl);
|
|
if (ctl->ops->set_power_state)
|
|
return ctl->ops->set_power_state(ctl, state);
|
|
return -ENXIO;
|
|
}
|
|
|
|
/**
|
|
* \brief Get actual Power State
|
|
* \param ctl CTL handle
|
|
* \param state Destination value
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state)
|
|
{
|
|
assert(ctl);
|
|
if (ctl->ops->get_power_state)
|
|
return ctl->ops->get_power_state(ctl, state);
|
|
return -ENXIO;
|
|
}
|
|
|
|
/**
|
|
* \brief Read an event
|
|
* \param ctl CTL handle
|
|
* \param event Event pointer
|
|
* \return number of events read otherwise a negative error code on failure
|
|
*/
|
|
int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event)
|
|
{
|
|
assert(ctl && event);
|
|
return (ctl->ops->read)(ctl, event);
|
|
}
|
|
|
|
/**
|
|
* \brief Wait for a CTL to become ready (i.e. at least one event pending)
|
|
* \param ctl CTL handle
|
|
* \param timeout maximum time in milliseconds to wait
|
|
* \return 0 otherwise a negative error code on failure
|
|
*/
|
|
int snd_ctl_wait(snd_ctl_t *ctl, int timeout)
|
|
{
|
|
struct pollfd *pfd;
|
|
unsigned short *revents;
|
|
int i, npfds, pollio, err, err_poll;
|
|
|
|
npfds = snd_ctl_poll_descriptors_count(ctl);
|
|
if (npfds <= 0 || npfds >= 16) {
|
|
SNDERR("Invalid poll_fds %d\n", npfds);
|
|
return -EIO;
|
|
}
|
|
pfd = alloca(sizeof(*pfd) * npfds);
|
|
revents = alloca(sizeof(*revents) * npfds);
|
|
err = snd_ctl_poll_descriptors(ctl, pfd, npfds);
|
|
if (err < 0)
|
|
return err;
|
|
if (err != npfds) {
|
|
SNDMSG("invalid poll descriptors %d\n", err);
|
|
return -EIO;
|
|
}
|
|
do {
|
|
err_poll = poll(pfd, npfds, timeout);
|
|
if (err_poll < 0)
|
|
return -errno;
|
|
if (! err_poll)
|
|
break;
|
|
err = snd_ctl_poll_descriptors_revents(ctl, pfd, npfds, revents);
|
|
if (err < 0)
|
|
return err;
|
|
pollio = 0;
|
|
for (i = 0; i < npfds; i++) {
|
|
if (revents[i] & (POLLERR | POLLNVAL))
|
|
return -EIO;
|
|
if ((revents[i] & (POLLIN | POLLOUT)) == 0)
|
|
continue;
|
|
pollio++;
|
|
}
|
|
} while (! pollio);
|
|
|
|
return err_poll > 0 ? 1 : 0;
|
|
}
|
|
|
|
/**
|
|
* \brief Add an async handler for a CTL
|
|
* \param handler Returned handler handle
|
|
* \param ctl CTL handle
|
|
* \param callback Callback function
|
|
* \param private_data Callback private data
|
|
* \return 0 otherwise a negative error code on failure
|
|
*/
|
|
int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl,
|
|
snd_async_callback_t callback, void *private_data)
|
|
{
|
|
int err;
|
|
int was_empty;
|
|
snd_async_handler_t *h;
|
|
err = snd_async_add_handler(&h, _snd_ctl_async_descriptor(ctl),
|
|
callback, private_data);
|
|
if (err < 0)
|
|
return err;
|
|
h->type = SND_ASYNC_HANDLER_CTL;
|
|
h->u.ctl = ctl;
|
|
was_empty = list_empty(&ctl->async_handlers);
|
|
list_add_tail(&h->hlist, &ctl->async_handlers);
|
|
if (was_empty) {
|
|
err = snd_ctl_async(ctl, snd_async_handler_get_signo(h), getpid());
|
|
if (err < 0) {
|
|
snd_async_del_handler(h);
|
|
return err;
|
|
}
|
|
}
|
|
*handler = h;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief Return CTL handle related to an async handler
|
|
* \param handler Async handler handle
|
|
* \return CTL handle
|
|
*/
|
|
snd_ctl_t *snd_async_handler_get_ctl(snd_async_handler_t *handler)
|
|
{
|
|
assert(handler->type == SND_ASYNC_HANDLER_CTL);
|
|
return handler->u.ctl;
|
|
}
|
|
|
|
static const char *build_in_ctls[] = {
|
|
"hw", "shm", NULL
|
|
};
|
|
|
|
static int snd_ctl_open_conf(snd_ctl_t **ctlp, const char *name,
|
|
snd_config_t *ctl_root, snd_config_t *ctl_conf, int mode)
|
|
{
|
|
const char *str;
|
|
char *buf = NULL, *buf1 = NULL;
|
|
int err;
|
|
snd_config_t *conf, *type_conf = NULL;
|
|
snd_config_iterator_t i, next;
|
|
const char *lib = NULL, *open_name = NULL;
|
|
const char *id;
|
|
int (*open_func)(snd_ctl_t **, const char *, snd_config_t *, snd_config_t *, int) = NULL;
|
|
#ifndef PIC
|
|
extern void *snd_control_open_symbols(void);
|
|
#endif
|
|
void *h = NULL;
|
|
if (snd_config_get_type(ctl_conf) != SND_CONFIG_TYPE_COMPOUND) {
|
|
if (name)
|
|
SNDERR("Invalid type for CTL %s definition", name);
|
|
else
|
|
SNDERR("Invalid type for CTL definition");
|
|
return -EINVAL;
|
|
}
|
|
err = snd_config_search(ctl_conf, "type", &conf);
|
|
if (err < 0) {
|
|
SNDERR("type is not defined");
|
|
return err;
|
|
}
|
|
err = snd_config_get_id(conf, &id);
|
|
if (err < 0) {
|
|
SNDERR("unable to get id");
|
|
return err;
|
|
}
|
|
err = snd_config_get_string(conf, &str);
|
|
if (err < 0) {
|
|
SNDERR("Invalid type for %s", id);
|
|
return err;
|
|
}
|
|
err = snd_config_search_definition(ctl_root, "ctl_type", str, &type_conf);
|
|
if (err >= 0) {
|
|
if (snd_config_get_type(type_conf) != SND_CONFIG_TYPE_COMPOUND) {
|
|
SNDERR("Invalid type for CTL type %s definition", str);
|
|
goto _err;
|
|
}
|
|
snd_config_for_each(i, next, type_conf) {
|
|
snd_config_t *n = snd_config_iterator_entry(i);
|
|
const char *id;
|
|
if (snd_config_get_id(n, &id) < 0)
|
|
continue;
|
|
if (strcmp(id, "comment") == 0)
|
|
continue;
|
|
if (strcmp(id, "lib") == 0) {
|
|
err = snd_config_get_string(n, &lib);
|
|
if (err < 0) {
|
|
SNDERR("Invalid type for %s", id);
|
|
goto _err;
|
|
}
|
|
continue;
|
|
}
|
|
if (strcmp(id, "open") == 0) {
|
|
err = snd_config_get_string(n, &open_name);
|
|
if (err < 0) {
|
|
SNDERR("Invalid type for %s", id);
|
|
goto _err;
|
|
}
|
|
continue;
|
|
}
|
|
SNDERR("Unknown field %s", id);
|
|
err = -EINVAL;
|
|
goto _err;
|
|
}
|
|
}
|
|
if (!open_name) {
|
|
buf = malloc(strlen(str) + 32);
|
|
if (buf == NULL) {
|
|
err = -ENOMEM;
|
|
goto _err;
|
|
}
|
|
open_name = buf;
|
|
sprintf(buf, "_snd_ctl_%s_open", str);
|
|
}
|
|
if (!lib) {
|
|
const char **build_in = build_in_ctls;
|
|
while (*build_in) {
|
|
if (!strcmp(*build_in, str))
|
|
break;
|
|
build_in++;
|
|
}
|
|
if (*build_in == NULL) {
|
|
buf1 = malloc(strlen(str) + sizeof(PKGLIBDIR) + 32);
|
|
if (buf1 == NULL) {
|
|
err = -ENOMEM;
|
|
goto _err;
|
|
}
|
|
lib = buf1;
|
|
sprintf(buf1, "%s/libasound_module_ctl_%s.so", PKGLIBDIR, str);
|
|
}
|
|
}
|
|
#ifndef PIC
|
|
snd_control_open_symbols();
|
|
#endif
|
|
open_func = snd_dlobj_cache_lookup(open_name);
|
|
if (open_func) {
|
|
err = 0;
|
|
goto _err;
|
|
}
|
|
h = snd_dlopen(lib, RTLD_NOW);
|
|
if (h)
|
|
open_func = snd_dlsym(h, open_name, SND_DLSYM_VERSION(SND_CONTROL_DLSYM_VERSION));
|
|
err = 0;
|
|
if (!h) {
|
|
SNDERR("Cannot open shared library %s", lib);
|
|
err = -ENOENT;
|
|
} else if (!open_func) {
|
|
SNDERR("symbol %s is not defined inside %s", open_name, lib);
|
|
snd_dlclose(h);
|
|
err = -ENXIO;
|
|
}
|
|
_err:
|
|
if (type_conf)
|
|
snd_config_delete(type_conf);
|
|
if (err >= 0) {
|
|
err = open_func(ctlp, name, ctl_root, ctl_conf, mode);
|
|
if (err >= 0) {
|
|
if (h /*&& (mode & SND_CTL_KEEP_ALIVE)*/) {
|
|
snd_dlobj_cache_add(open_name, h, open_func);
|
|
h = NULL;
|
|
}
|
|
(*ctlp)->dl_handle = h;
|
|
err = 0;
|
|
} else {
|
|
if (h)
|
|
snd_dlclose(h);
|
|
}
|
|
}
|
|
free(buf);
|
|
free(buf1);
|
|
return err;
|
|
}
|
|
|
|
static int snd_ctl_open_noupdate(snd_ctl_t **ctlp, snd_config_t *root, const char *name, int mode)
|
|
{
|
|
int err;
|
|
snd_config_t *ctl_conf;
|
|
err = snd_config_search_definition(root, "ctl", name, &ctl_conf);
|
|
if (err < 0) {
|
|
SNDERR("Invalid CTL %s", name);
|
|
return err;
|
|
}
|
|
err = snd_ctl_open_conf(ctlp, name, root, ctl_conf, mode);
|
|
snd_config_delete(ctl_conf);
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* \brief Opens a CTL
|
|
* \param ctlp Returned CTL handle
|
|
* \param name ASCII identifier of the CTL handle
|
|
* \param mode Open mode (see #SND_CTL_NONBLOCK, #SND_CTL_ASYNC)
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_open(snd_ctl_t **ctlp, const char *name, int mode)
|
|
{
|
|
int err;
|
|
assert(ctlp && name);
|
|
err = snd_config_update();
|
|
if (err < 0)
|
|
return err;
|
|
return snd_ctl_open_noupdate(ctlp, snd_config, name, mode);
|
|
}
|
|
|
|
/**
|
|
* \brief Opens a CTL using local configuration
|
|
* \param ctlp Returned CTL handle
|
|
* \param name ASCII identifier of the CTL handle
|
|
* \param mode Open mode (see #SND_CTL_NONBLOCK, #SND_CTL_ASYNC)
|
|
* \param lconf Local configuration
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_open_lconf(snd_ctl_t **ctlp, const char *name,
|
|
int mode, snd_config_t *lconf)
|
|
{
|
|
assert(ctlp && name && lconf);
|
|
return snd_ctl_open_noupdate(ctlp, lconf, name, mode);
|
|
}
|
|
|
|
#ifndef DOC_HIDDEN
|
|
#define TYPE(v) [SND_CTL_ELEM_TYPE_##v] = #v
|
|
#define IFACE(v) [SND_CTL_ELEM_IFACE_##v] = #v
|
|
#define EVENT(v) [SND_CTL_EVENT_##v] = #v
|
|
|
|
static const char *snd_ctl_elem_type_names[] = {
|
|
TYPE(NONE),
|
|
TYPE(BOOLEAN),
|
|
TYPE(INTEGER),
|
|
TYPE(ENUMERATED),
|
|
TYPE(BYTES),
|
|
TYPE(IEC958),
|
|
TYPE(INTEGER64),
|
|
};
|
|
|
|
static const char *snd_ctl_elem_iface_names[] = {
|
|
IFACE(CARD),
|
|
IFACE(HWDEP),
|
|
IFACE(MIXER),
|
|
IFACE(PCM),
|
|
IFACE(RAWMIDI),
|
|
IFACE(TIMER),
|
|
IFACE(SEQUENCER),
|
|
};
|
|
|
|
static const char *snd_ctl_event_type_names[] = {
|
|
EVENT(ELEM),
|
|
};
|
|
#endif
|
|
|
|
/**
|
|
* \brief get name of a CTL element type
|
|
* \param type CTL element type
|
|
* \return ascii name of CTL element type
|
|
*/
|
|
const char *snd_ctl_elem_type_name(snd_ctl_elem_type_t type)
|
|
{
|
|
assert(type <= SND_CTL_ELEM_TYPE_LAST);
|
|
return snd_ctl_elem_type_names[type];
|
|
}
|
|
|
|
/**
|
|
* \brief get name of a CTL element related interface
|
|
* \param iface CTL element related interface
|
|
* \return ascii name of CTL element related interface
|
|
*/
|
|
const char *snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface)
|
|
{
|
|
assert(iface <= SND_CTL_ELEM_IFACE_LAST);
|
|
return snd_ctl_elem_iface_names[iface];
|
|
}
|
|
|
|
/**
|
|
* \brief get name of a CTL event type
|
|
* \param type CTL event type
|
|
* \return ascii name of CTL event type
|
|
*/
|
|
const char *snd_ctl_event_type_name(snd_ctl_event_type_t type)
|
|
{
|
|
assert(type <= SND_CTL_EVENT_LAST);
|
|
return snd_ctl_event_type_names[type];
|
|
}
|
|
|
|
/**
|
|
* \brief allocate space for CTL element identifiers list
|
|
* \param obj CTL element identifiers list
|
|
* \param entries Entries to allocate
|
|
* \return 0 on success otherwise a negative error code
|
|
*/
|
|
int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries)
|
|
{
|
|
free(obj->pids);
|
|
obj->pids = calloc(entries, sizeof(*obj->pids));
|
|
if (!obj->pids) {
|
|
obj->space = 0;
|
|
return -ENOMEM;
|
|
}
|
|
obj->space = entries;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief free previously allocated space for CTL element identifiers list
|
|
* \param obj CTL element identifiers list
|
|
*/
|
|
void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj)
|
|
{
|
|
free(obj->pids);
|
|
obj->pids = NULL;
|
|
obj->space = 0;
|
|
}
|
|
|
|
/**
|
|
* \brief Get event mask for an element related event
|
|
* \param obj CTL event
|
|
* \return event mask for element related event
|
|
*/
|
|
unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_EVENT_ELEM);
|
|
return obj->data.elem.mask;
|
|
}
|
|
|
|
/**
|
|
* \brief Get CTL element identifier for an element related event
|
|
* \param obj CTL event
|
|
* \param ptr Pointer to returned CTL element identifier
|
|
*/
|
|
void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr)
|
|
{
|
|
assert(obj && ptr);
|
|
assert(obj->type == SND_CTL_EVENT_ELEM);
|
|
*ptr = obj->data.elem.id;
|
|
}
|
|
|
|
/**
|
|
* \brief Get element numeric identifier for an element related event
|
|
* \param obj CTL event
|
|
* \return element numeric identifier
|
|
*/
|
|
unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_EVENT_ELEM);
|
|
return obj->data.elem.id.numid;
|
|
}
|
|
|
|
/**
|
|
* \brief Get interface part of CTL element identifier for an element related event
|
|
* \param obj CTL event
|
|
* \return interface part of element identifier
|
|
*/
|
|
snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_EVENT_ELEM);
|
|
return obj->data.elem.id.iface;
|
|
}
|
|
|
|
/**
|
|
* \brief Get device part of CTL element identifier for an element related event
|
|
* \param obj CTL event
|
|
* \return device part of element identifier
|
|
*/
|
|
unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_EVENT_ELEM);
|
|
return obj->data.elem.id.device;
|
|
}
|
|
|
|
/**
|
|
* \brief Get subdevice part of CTL element identifier for an element related event
|
|
* \param obj CTL event
|
|
* \return subdevice part of element identifier
|
|
*/
|
|
unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_EVENT_ELEM);
|
|
return obj->data.elem.id.subdevice;
|
|
}
|
|
|
|
/**
|
|
* \brief Get name part of CTL element identifier for an element related event
|
|
* \param obj CTL event
|
|
* \return name part of element identifier
|
|
*/
|
|
const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_EVENT_ELEM);
|
|
return (const char *)obj->data.elem.id.name;
|
|
}
|
|
|
|
/**
|
|
* \brief Get index part of CTL element identifier for an element related event
|
|
* \param obj CTL event
|
|
* \return index part of element identifier
|
|
*/
|
|
unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_EVENT_ELEM);
|
|
return obj->data.elem.id.index;
|
|
}
|
|
|
|
#ifndef DOC_HIDDEN
|
|
int _snd_ctl_poll_descriptor(snd_ctl_t *ctl)
|
|
{
|
|
assert(ctl);
|
|
return ctl->poll_fd;
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* \brief get size of #snd_ctl_elem_id_t
|
|
* \return size in bytes
|
|
*/
|
|
size_t snd_ctl_elem_id_sizeof()
|
|
{
|
|
return sizeof(snd_ctl_elem_id_t);
|
|
}
|
|
|
|
/**
|
|
* \brief allocate an invalid #snd_ctl_elem_id_t using standard malloc
|
|
* \param ptr returned pointer
|
|
* \return 0 on success otherwise negative error code
|
|
*/
|
|
int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr)
|
|
{
|
|
assert(ptr);
|
|
*ptr = calloc(1, sizeof(snd_ctl_elem_id_t));
|
|
if (!*ptr)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief frees a previously allocated #snd_ctl_elem_id_t
|
|
* \param obj pointer to object to free
|
|
*/
|
|
void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj)
|
|
{
|
|
free(obj);
|
|
}
|
|
|
|
/**
|
|
* \brief clear given #snd_ctl_elem_id_t object
|
|
* \param obj pointer to object to clear
|
|
*/
|
|
void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj)
|
|
{
|
|
memset(obj, 0, sizeof(snd_ctl_elem_id_t));
|
|
}
|
|
|
|
/**
|
|
* \brief copy one #snd_ctl_elem_id_t to another
|
|
* \param dst pointer to destination
|
|
* \param src pointer to source
|
|
*/
|
|
void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src)
|
|
{
|
|
assert(dst && src);
|
|
*dst = *src;
|
|
}
|
|
|
|
/**
|
|
* \brief Get numeric identifier from a CTL element identifier
|
|
* \param obj CTL element identifier
|
|
* \return CTL element numeric identifier
|
|
*/
|
|
unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->numid;
|
|
}
|
|
|
|
/**
|
|
* \brief Get interface part of a CTL element identifier
|
|
* \param obj CTL element identifier
|
|
* \return CTL element related interface
|
|
*/
|
|
snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->iface;
|
|
}
|
|
|
|
/**
|
|
* \brief Get device part of a CTL element identifier
|
|
* \param obj CTL element identifier
|
|
* \return CTL element related device
|
|
*/
|
|
unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->device;
|
|
}
|
|
|
|
/**
|
|
* \brief Get subdevice part of a CTL element identifier
|
|
* \param obj CTL element identifier
|
|
* \return CTL element related subdevice
|
|
*/
|
|
unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->subdevice;
|
|
}
|
|
|
|
/**
|
|
* \brief Get name part of a CTL element identifier
|
|
* \param obj CTL element identifier
|
|
* \return CTL element name
|
|
*/
|
|
const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj)
|
|
{
|
|
assert(obj);
|
|
return (const char *)obj->name;
|
|
}
|
|
|
|
/**
|
|
* \brief Get index part of a CTL element identifier
|
|
* \param obj CTL element identifier
|
|
* \return CTL element index
|
|
*/
|
|
unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->index;
|
|
}
|
|
|
|
/**
|
|
* \brief Set numeric identifier for a CTL element identifier
|
|
* \param obj CTL element identifier
|
|
* \param val CTL element numeric identifier
|
|
*/
|
|
void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->numid = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set interface part for a CTL element identifier
|
|
* \param obj CTL element identifier
|
|
* \param val CTL element related interface
|
|
*/
|
|
void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val)
|
|
{
|
|
assert(obj);
|
|
obj->iface = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set device part for a CTL element identifier
|
|
* \param obj CTL element identifier
|
|
* \param val CTL element related device
|
|
*/
|
|
void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->device = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set subdevice part for a CTL element identifier
|
|
* \param obj CTL element identifier
|
|
* \param val CTL element related subdevice
|
|
*/
|
|
void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->subdevice = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set name part for a CTL element identifier
|
|
* \param obj CTL element identifier
|
|
* \param val CTL element name
|
|
*/
|
|
void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val)
|
|
{
|
|
assert(obj);
|
|
strncpy((char *)obj->name, val, sizeof(obj->name));
|
|
}
|
|
|
|
/**
|
|
* \brief Set index part for a CTL element identifier
|
|
* \param obj CTL element identifier
|
|
* \param val CTL element index
|
|
*/
|
|
void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->index = val;
|
|
}
|
|
|
|
/**
|
|
* \brief get size of #snd_ctl_card_info_t
|
|
* \return size in bytes
|
|
*/
|
|
size_t snd_ctl_card_info_sizeof()
|
|
{
|
|
return sizeof(snd_ctl_card_info_t);
|
|
}
|
|
|
|
/**
|
|
* \brief allocate an invalid #snd_ctl_card_info_t using standard malloc
|
|
* \param ptr returned pointer
|
|
* \return 0 on success otherwise negative error code
|
|
*/
|
|
int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr)
|
|
{
|
|
assert(ptr);
|
|
*ptr = calloc(1, sizeof(snd_ctl_card_info_t));
|
|
if (!*ptr)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief frees a previously allocated #snd_ctl_card_info_t
|
|
* \param obj pointer to object to free
|
|
*/
|
|
void snd_ctl_card_info_free(snd_ctl_card_info_t *obj)
|
|
{
|
|
free(obj);
|
|
}
|
|
|
|
/**
|
|
* \brief clear given #snd_ctl_card_info_t object
|
|
* \param obj pointer to object to clear
|
|
*/
|
|
void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj)
|
|
{
|
|
memset(obj, 0, sizeof(snd_ctl_card_info_t));
|
|
}
|
|
|
|
/**
|
|
* \brief copy one #snd_ctl_card_info_t to another
|
|
* \param dst pointer to destination
|
|
* \param src pointer to source
|
|
*/
|
|
void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src)
|
|
{
|
|
assert(dst && src);
|
|
*dst = *src;
|
|
}
|
|
|
|
/**
|
|
* \brief Get card number from a CTL card info
|
|
* \param obj CTL card info
|
|
* \return card number
|
|
*/
|
|
int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->card;
|
|
}
|
|
|
|
/**
|
|
* \brief Get card identifier from a CTL card info
|
|
* \param obj CTL card info
|
|
* \return card identifier
|
|
*/
|
|
const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return (const char *)obj->id;
|
|
}
|
|
|
|
/**
|
|
* \brief Get card driver name from a CTL card info
|
|
* \param obj CTL card info
|
|
* \return card driver name
|
|
*/
|
|
const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return (const char *)obj->driver;
|
|
}
|
|
|
|
/**
|
|
* \brief Get card name from a CTL card info
|
|
* \param obj CTL card info
|
|
* \return card name
|
|
*/
|
|
const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return (const char *)obj->name;
|
|
}
|
|
|
|
/**
|
|
* \brief Get card long name from a CTL card info
|
|
* \param obj CTL card info
|
|
* \return card long name
|
|
*/
|
|
const char *snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return (const char *)obj->longname;
|
|
}
|
|
|
|
/**
|
|
* \brief Get card mixer name from a CTL card info
|
|
* \param obj CTL card info
|
|
* \return card mixer name
|
|
*/
|
|
const char *snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return (const char *)obj->mixername;
|
|
}
|
|
|
|
/**
|
|
* \brief Get card component list from a CTL card info
|
|
* \param obj CTL card info
|
|
* \return card mixer identifier
|
|
*/
|
|
const char *snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return (const char *)obj->components;
|
|
}
|
|
|
|
/**
|
|
* \brief get size of #snd_ctl_event_t
|
|
* \return size in bytes
|
|
*/
|
|
size_t snd_ctl_event_sizeof()
|
|
{
|
|
return sizeof(snd_ctl_event_t);
|
|
}
|
|
|
|
/**
|
|
* \brief allocate an invalid #snd_ctl_event_t using standard malloc
|
|
* \param ptr returned pointer
|
|
* \return 0 on success otherwise negative error code
|
|
*/
|
|
int snd_ctl_event_malloc(snd_ctl_event_t **ptr)
|
|
{
|
|
assert(ptr);
|
|
*ptr = calloc(1, sizeof(snd_ctl_event_t));
|
|
if (!*ptr)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief frees a previously allocated #snd_ctl_event_t
|
|
* \param obj pointer to object to free
|
|
*/
|
|
void snd_ctl_event_free(snd_ctl_event_t *obj)
|
|
{
|
|
free(obj);
|
|
}
|
|
|
|
/**
|
|
* \brief clear given #snd_ctl_event_t object
|
|
* \param obj pointer to object to clear
|
|
*/
|
|
void snd_ctl_event_clear(snd_ctl_event_t *obj)
|
|
{
|
|
memset(obj, 0, sizeof(snd_ctl_event_t));
|
|
}
|
|
|
|
/**
|
|
* \brief copy one #snd_ctl_event_t to another
|
|
* \param dst pointer to destination
|
|
* \param src pointer to source
|
|
*/
|
|
void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src)
|
|
{
|
|
assert(dst && src);
|
|
*dst = *src;
|
|
}
|
|
|
|
/**
|
|
* \brief Get type of a CTL event
|
|
* \param obj CTL event
|
|
* \return CTL event type
|
|
*/
|
|
snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->type;
|
|
}
|
|
|
|
/**
|
|
* \brief get size of #snd_ctl_elem_list_t
|
|
* \return size in bytes
|
|
*/
|
|
size_t snd_ctl_elem_list_sizeof()
|
|
{
|
|
return sizeof(snd_ctl_elem_list_t);
|
|
}
|
|
|
|
/**
|
|
* \brief allocate an invalid #snd_ctl_elem_list_t using standard malloc
|
|
* \param ptr returned pointer
|
|
* \return 0 on success otherwise negative error code
|
|
*/
|
|
int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr)
|
|
{
|
|
assert(ptr);
|
|
*ptr = calloc(1, sizeof(snd_ctl_elem_list_t));
|
|
if (!*ptr)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief frees a previously allocated #snd_ctl_elem_list_t
|
|
* \param obj pointer to object to free
|
|
*/
|
|
void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj)
|
|
{
|
|
free(obj);
|
|
}
|
|
|
|
/**
|
|
* \brief clear given #snd_ctl_elem_list_t object
|
|
* \param obj pointer to object to clear
|
|
*/
|
|
void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj)
|
|
{
|
|
memset(obj, 0, sizeof(snd_ctl_elem_list_t));
|
|
}
|
|
|
|
/**
|
|
* \brief copy one #snd_ctl_elem_list_t to another
|
|
* \param dst pointer to destination
|
|
* \param src pointer to source
|
|
*/
|
|
void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src)
|
|
{
|
|
assert(dst && src);
|
|
*dst = *src;
|
|
}
|
|
|
|
/**
|
|
* \brief Set index of first wanted CTL element identifier in a CTL element identifiers list
|
|
* \param obj CTL element identifiers list
|
|
* \param val index of CTL element to put at position 0 of list
|
|
*/
|
|
void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->offset = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Get number of used entries in CTL element identifiers list
|
|
* \param obj CTL element identifier list
|
|
* \return number of used entries
|
|
*/
|
|
unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->used;
|
|
}
|
|
|
|
/**
|
|
* \brief Get total count of elements present in CTL device (information present in every filled CTL element identifiers list)
|
|
* \param obj CTL element identifier list
|
|
* \return total number of elements
|
|
*/
|
|
unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->count;
|
|
}
|
|
|
|
/**
|
|
* \brief Get CTL element identifier for an entry of a CTL element identifiers list
|
|
* \param obj CTL element identifier list
|
|
* \param idx Index of entry
|
|
* \param ptr Pointer to returned CTL element identifier
|
|
*/
|
|
void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr)
|
|
{
|
|
assert(obj && ptr);
|
|
assert(idx < obj->used);
|
|
*ptr = obj->pids[idx];
|
|
}
|
|
|
|
/**
|
|
* \brief Get CTL element numeric identifier for an entry of a CTL element identifiers list
|
|
* \param obj CTL element identifier list
|
|
* \param idx Index of entry
|
|
* \return CTL element numeric identifier
|
|
*/
|
|
unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx)
|
|
{
|
|
assert(obj);
|
|
assert(idx < obj->used);
|
|
return obj->pids[idx].numid;
|
|
}
|
|
|
|
/**
|
|
* \brief Get interface part of CTL element identifier for an entry of a CTL element identifiers list
|
|
* \param obj CTL element identifier list
|
|
* \param idx Index of entry
|
|
* \return CTL element related interface
|
|
*/
|
|
snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx)
|
|
{
|
|
assert(obj);
|
|
assert(idx < obj->used);
|
|
return obj->pids[idx].iface;
|
|
}
|
|
|
|
/**
|
|
* \brief Get device part of CTL element identifier for an entry of a CTL element identifiers list
|
|
* \param obj CTL element identifier list
|
|
* \param idx Index of entry
|
|
* \return CTL element related device
|
|
*/
|
|
unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx)
|
|
{
|
|
assert(obj);
|
|
assert(idx < obj->used);
|
|
return obj->pids[idx].device;
|
|
}
|
|
|
|
/**
|
|
* \brief Get subdevice part of CTL element identifier for an entry of a CTL element identifiers list
|
|
* \param obj CTL element identifier list
|
|
* \param idx Index of entry
|
|
* \return CTL element related subdevice
|
|
*/
|
|
unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx)
|
|
{
|
|
assert(obj);
|
|
assert(idx < obj->used);
|
|
return obj->pids[idx].subdevice;
|
|
}
|
|
|
|
/**
|
|
* \brief Get name part of CTL element identifier for an entry of a CTL element identifiers list
|
|
* \param obj CTL element identifier list
|
|
* \param idx Index of entry
|
|
* \return CTL element name
|
|
*/
|
|
const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx)
|
|
{
|
|
assert(obj);
|
|
assert(idx < obj->used);
|
|
return (const char *)obj->pids[idx].name;
|
|
}
|
|
|
|
/**
|
|
* \brief Get index part of CTL element identifier for an entry of a CTL element identifiers list
|
|
* \param obj CTL element identifier list
|
|
* \param idx Index of entry
|
|
* \return CTL element index
|
|
*/
|
|
unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx)
|
|
{
|
|
assert(obj);
|
|
assert(idx < obj->used);
|
|
return obj->pids[idx].index;
|
|
}
|
|
|
|
/**
|
|
* \brief get size of #snd_ctl_elem_info_t
|
|
* \return size in bytes
|
|
*/
|
|
size_t snd_ctl_elem_info_sizeof()
|
|
{
|
|
return sizeof(snd_ctl_elem_info_t);
|
|
}
|
|
|
|
/**
|
|
* \brief allocate an invalid #snd_ctl_elem_info_t using standard malloc
|
|
* \param ptr returned pointer
|
|
* \return 0 on success otherwise negative error code
|
|
*/
|
|
int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr)
|
|
{
|
|
assert(ptr);
|
|
*ptr = calloc(1, sizeof(snd_ctl_elem_info_t));
|
|
if (!*ptr)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief frees a previously allocated #snd_ctl_elem_info_t
|
|
* \param obj pointer to object to free
|
|
*/
|
|
void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj)
|
|
{
|
|
free(obj);
|
|
}
|
|
|
|
/**
|
|
* \brief clear given #snd_ctl_elem_info_t object
|
|
* \param obj pointer to object to clear
|
|
*/
|
|
void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj)
|
|
{
|
|
memset(obj, 0, sizeof(snd_ctl_elem_info_t));
|
|
}
|
|
|
|
/**
|
|
* \brief copy one #snd_ctl_elem_info_t to another
|
|
* \param dst pointer to destination
|
|
* \param src pointer to source
|
|
*/
|
|
void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src)
|
|
{
|
|
assert(dst && src);
|
|
*dst = *src;
|
|
}
|
|
|
|
/**
|
|
* \brief Get type from a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return CTL element content type
|
|
*/
|
|
snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->type;
|
|
}
|
|
|
|
/**
|
|
* \brief Get info about readability from a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return 0 if element is not readable, 1 if element is readable
|
|
*/
|
|
int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return !!(obj->access & SNDRV_CTL_ELEM_ACCESS_READ);
|
|
}
|
|
|
|
/**
|
|
* \brief Get info about writability from a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return 0 if element is not writable, 1 if element is not writable
|
|
*/
|
|
int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return !!(obj->access & SNDRV_CTL_ELEM_ACCESS_WRITE);
|
|
}
|
|
|
|
/**
|
|
* \brief Get info about notification feasibility from a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return 0 if all element value changes are notified to subscribed applications, 1 otherwise
|
|
*/
|
|
int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return !!(obj->access & SNDRV_CTL_ELEM_ACCESS_VOLATILE);
|
|
}
|
|
|
|
/**
|
|
* \brief Get info about status from a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return 0 if element value is not active, 1 if is active
|
|
*/
|
|
int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return !!(obj->access & SNDRV_CTL_ELEM_ACCESS_INACTIVE);
|
|
}
|
|
|
|
/**
|
|
* \brief Get info whether an element is locked
|
|
* \param obj CTL element id/info
|
|
* \return 0 if element value is currently changeable, 1 if it's locked by another application
|
|
*/
|
|
int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return !!(obj->access & SNDRV_CTL_ELEM_ACCESS_LOCK);
|
|
}
|
|
|
|
/**
|
|
* \brief Get info if I own an element
|
|
* \param obj CTL element id/info
|
|
* \return 0 if element value is currently changeable, 1 if it's locked by another application
|
|
*/
|
|
int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return !!(obj->access & SNDRV_CTL_ELEM_ACCESS_OWNER);
|
|
}
|
|
|
|
/**
|
|
* \brief Get info if it's a user element
|
|
* \param obj CTL element id/info
|
|
* \return 0 if element value is a system element, 1 if it's a user-created element
|
|
*/
|
|
int snd_ctl_elem_info_is_user(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return !!(obj->access & SNDRV_CTL_ELEM_ACCESS_USER);
|
|
}
|
|
|
|
/**
|
|
* \brief Get info about TLV readability from a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return 0 if element's TLV is not readable, 1 if element's TLV is readable
|
|
*/
|
|
int snd_ctl_elem_info_is_tlv_readable(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return !!(obj->access & SNDRV_CTL_ELEM_ACCESS_TLV_READ);
|
|
}
|
|
|
|
/**
|
|
* \brief Get info about TLV writeability from a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return 0 if element's TLV is not writable, 1 if element's TLV is writable
|
|
*/
|
|
int snd_ctl_elem_info_is_tlv_writable(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return !!(obj->access & SNDRV_CTL_ELEM_ACCESS_TLV_WRITE);
|
|
}
|
|
|
|
/**
|
|
* \brief Get info about TLV command possibility from a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return 0 if element's TLV command is not possible, 1 if element's TLV command is supported
|
|
*/
|
|
int snd_ctl_elem_info_is_tlv_commandable(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return !!(obj->access & SNDRV_CTL_ELEM_ACCESS_TLV_COMMAND);
|
|
}
|
|
|
|
/**
|
|
* \brief (DEPRECATED) Get info about values passing policy from a CTL element value
|
|
* \param obj CTL element id/info
|
|
* \return 0 if element value need to be passed by contents, 1 if need to be passed with a pointer
|
|
*/
|
|
int snd_ctl_elem_info_is_indirect(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return !!(obj->access & SNDRV_CTL_ELEM_ACCESS_INDIRECT);
|
|
}
|
|
link_warning(snd_ctl_elem_info_is_indirect, "Warning: snd_ctl_elem_info_is_indirect is deprecated, do not use it");
|
|
|
|
/**
|
|
* \brief Get owner of a locked element
|
|
* \param obj CTL element id/info
|
|
* \return value entries count
|
|
*/
|
|
pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->owner;
|
|
}
|
|
|
|
/**
|
|
* \brief Get number of value entries from a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return value entries count
|
|
*/
|
|
unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->count;
|
|
}
|
|
|
|
/**
|
|
* \brief Get minimum value from a #SND_CTL_ELEM_TYPE_INTEGER CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return Minimum value
|
|
*/
|
|
long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_ELEM_TYPE_INTEGER);
|
|
return obj->value.integer.min;
|
|
}
|
|
|
|
/**
|
|
* \brief Get maximum value from a #SND_CTL_ELEM_TYPE_INTEGER CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return Maximum value
|
|
*/
|
|
long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_ELEM_TYPE_INTEGER);
|
|
return obj->value.integer.max;
|
|
}
|
|
|
|
/**
|
|
* \brief Get value step from a #SND_CTL_ELEM_TYPE_INTEGER CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return Step
|
|
*/
|
|
long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_ELEM_TYPE_INTEGER);
|
|
return obj->value.integer.step;
|
|
}
|
|
|
|
/**
|
|
* \brief Get minimum value from a #SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return Minimum value
|
|
*/
|
|
long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_ELEM_TYPE_INTEGER64);
|
|
return obj->value.integer64.min;
|
|
}
|
|
|
|
/**
|
|
* \brief Get maximum value from a #SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return Maximum value
|
|
*/
|
|
long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_ELEM_TYPE_INTEGER64);
|
|
return obj->value.integer64.max;
|
|
}
|
|
|
|
/**
|
|
* \brief Get value step from a #SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return Step
|
|
*/
|
|
long long snd_ctl_elem_info_get_step64(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_ELEM_TYPE_INTEGER64);
|
|
return obj->value.integer64.step;
|
|
}
|
|
|
|
/**
|
|
* \brief Get number of items available from a #SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return items count
|
|
*/
|
|
unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_ELEM_TYPE_ENUMERATED);
|
|
return obj->value.enumerated.items;
|
|
}
|
|
|
|
/**
|
|
* \brief Select item in a #SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \param val item number
|
|
*/
|
|
void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->value.enumerated.item = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Get name for selected item in a #SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return name of chosen item
|
|
*/
|
|
const char *snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
assert(obj->type == SND_CTL_ELEM_TYPE_ENUMERATED);
|
|
return obj->value.enumerated.name;
|
|
}
|
|
|
|
/**
|
|
* \brief Get count of dimensions for given element
|
|
* \param obj CTL element id/info
|
|
* \return zero value if no dimensions are defined, otherwise positive value with count of dimensions
|
|
*/
|
|
#ifndef DOXYGEN
|
|
int INTERNAL(snd_ctl_elem_info_get_dimensions)(const snd_ctl_elem_info_t *obj)
|
|
#else
|
|
int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj)
|
|
#endif
|
|
{
|
|
int i;
|
|
|
|
assert(obj);
|
|
if (obj->access & SNDRV_CTL_ELEM_ACCESS_DINDIRECT)
|
|
return 0; /* FIXME: implement indirect access as well */
|
|
for (i = 3; i >= 0; i--)
|
|
if (obj->dimen.d[i])
|
|
break;
|
|
return i + 1;
|
|
}
|
|
use_default_symbol_version(__snd_ctl_elem_info_get_dimensions, snd_ctl_elem_info_get_dimensions, ALSA_0.9.3);
|
|
|
|
/**
|
|
* \brief Get specified of dimension width for given element
|
|
* \param obj CTL element id/info
|
|
* \param idx The dimension index
|
|
* \return zero value if no dimension width is defined, otherwise positive value with with of specified dimension
|
|
*/
|
|
#ifndef DOXYGEN
|
|
int INTERNAL(snd_ctl_elem_info_get_dimension)(const snd_ctl_elem_info_t *obj, unsigned int idx)
|
|
#else
|
|
int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx)
|
|
#endif
|
|
{
|
|
assert(obj);
|
|
if (obj->access & SNDRV_CTL_ELEM_ACCESS_DINDIRECT)
|
|
return 0; /* FIXME: implement indirect access as well */
|
|
if (idx >= 3)
|
|
return 0;
|
|
return obj->dimen.d[idx];
|
|
}
|
|
use_default_symbol_version(__snd_ctl_elem_info_get_dimension, snd_ctl_elem_info_get_dimension, ALSA_0.9.3);
|
|
|
|
/**
|
|
* \brief Get CTL element identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \param ptr Pointer to returned CTL element identifier
|
|
*/
|
|
void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr)
|
|
{
|
|
assert(obj && ptr);
|
|
*ptr = obj->id;
|
|
}
|
|
|
|
/**
|
|
* \brief Get element numeric identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return element numeric identifier
|
|
*/
|
|
unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->id.numid;
|
|
}
|
|
|
|
/**
|
|
* \brief Get interface part of CTL element identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return interface part of element identifier
|
|
*/
|
|
snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->id.iface;
|
|
}
|
|
|
|
/**
|
|
* \brief Get device part of CTL element identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return device part of element identifier
|
|
*/
|
|
unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->id.device;
|
|
}
|
|
|
|
/**
|
|
* \brief Get subdevice part of CTL element identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return subdevice part of element identifier
|
|
*/
|
|
unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->id.subdevice;
|
|
}
|
|
|
|
/**
|
|
* \brief Get name part of CTL element identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return name part of element identifier
|
|
*/
|
|
const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return (const char *)obj->id.name;
|
|
}
|
|
|
|
/**
|
|
* \brief Get index part of CTL element identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \return index part of element identifier
|
|
*/
|
|
unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->id.index;
|
|
}
|
|
|
|
/**
|
|
* \brief Set CTL element identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \param ptr CTL element identifier
|
|
*/
|
|
void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr)
|
|
{
|
|
assert(obj && ptr);
|
|
obj->id = *ptr;
|
|
}
|
|
|
|
/**
|
|
* \brief Set element numeric identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \param val element numeric identifier
|
|
*/
|
|
void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->id.numid = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set interface part of CTL element identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \param val interface part of element identifier
|
|
*/
|
|
void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val)
|
|
{
|
|
assert(obj);
|
|
obj->id.iface = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set device part of CTL element identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \param val device part of element identifier
|
|
*/
|
|
void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->id.device = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set subdevice part of CTL element identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \param val subdevice part of element identifier
|
|
*/
|
|
void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->id.subdevice = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set name part of CTL element identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \param val name part of element identifier
|
|
*/
|
|
void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val)
|
|
{
|
|
assert(obj);
|
|
strncpy((char *)obj->id.name, val, sizeof(obj->id.name));
|
|
}
|
|
|
|
/**
|
|
* \brief Set index part of CTL element identifier of a CTL element id/info
|
|
* \param obj CTL element id/info
|
|
* \param val index part of element identifier
|
|
*/
|
|
void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->id.index = val;
|
|
}
|
|
|
|
/**
|
|
* \brief get size of #snd_ctl_elem_value_t
|
|
* \return size in bytes
|
|
*/
|
|
size_t snd_ctl_elem_value_sizeof()
|
|
{
|
|
return sizeof(snd_ctl_elem_value_t);
|
|
}
|
|
|
|
/**
|
|
* \brief allocate an invalid #snd_ctl_elem_value_t using standard malloc
|
|
* \param ptr returned pointer
|
|
* \return 0 on success otherwise negative error code
|
|
*/
|
|
int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr)
|
|
{
|
|
assert(ptr);
|
|
*ptr = calloc(1, sizeof(snd_ctl_elem_value_t));
|
|
if (!*ptr)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* \brief frees a previously allocated #snd_ctl_elem_value_t
|
|
* \param obj pointer to object to free
|
|
*/
|
|
void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj)
|
|
{
|
|
free(obj);
|
|
}
|
|
|
|
/**
|
|
* \brief clear given #snd_ctl_elem_value_t object
|
|
* \param obj pointer to object to clear
|
|
*/
|
|
void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj)
|
|
{
|
|
memset(obj, 0, sizeof(snd_ctl_elem_value_t));
|
|
}
|
|
|
|
/**
|
|
* \brief copy one #snd_ctl_elem_value_t to another
|
|
* \param dst pointer to destination
|
|
* \param src pointer to source
|
|
*/
|
|
void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src)
|
|
{
|
|
assert(dst && src);
|
|
*dst = *src;
|
|
}
|
|
|
|
/**
|
|
* \brief Get CTL element identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param ptr Pointer to returned CTL element identifier
|
|
*/
|
|
void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr)
|
|
{
|
|
assert(obj && ptr);
|
|
*ptr = obj->id;
|
|
}
|
|
|
|
/**
|
|
* \brief Get element numeric identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \return element numeric identifier
|
|
*/
|
|
unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->id.numid;
|
|
}
|
|
|
|
/**
|
|
* \brief Get interface part of CTL element identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \return interface part of element identifier
|
|
*/
|
|
snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->id.iface;
|
|
}
|
|
|
|
/**
|
|
* \brief Get device part of CTL element identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \return device part of element identifier
|
|
*/
|
|
unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->id.device;
|
|
}
|
|
|
|
/**
|
|
* \brief Get subdevice part of CTL element identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \return subdevice part of element identifier
|
|
*/
|
|
unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->id.subdevice;
|
|
}
|
|
|
|
/**
|
|
* \brief Get name part of CTL element identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \return name part of element identifier
|
|
*/
|
|
const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj)
|
|
{
|
|
assert(obj);
|
|
return (const char *)obj->id.name;
|
|
}
|
|
|
|
/**
|
|
* \brief Get index part of CTL element identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \return index part of element identifier
|
|
*/
|
|
unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->id.index;
|
|
}
|
|
|
|
/**
|
|
* \brief Set CTL element identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param ptr CTL element identifier
|
|
*/
|
|
void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr)
|
|
{
|
|
assert(obj && ptr);
|
|
obj->id = *ptr;
|
|
}
|
|
|
|
/**
|
|
* \brief Set element numeric identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param val element numeric identifier
|
|
*/
|
|
void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->id.numid = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set interface part of CTL element identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param val interface part of element identifier
|
|
*/
|
|
void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val)
|
|
{
|
|
assert(obj);
|
|
obj->id.iface = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set device part of CTL element identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param val device part of element identifier
|
|
*/
|
|
void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->id.device = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set subdevice part of CTL element identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param val subdevice part of element identifier
|
|
*/
|
|
void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->id.subdevice = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set name part of CTL element identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param val name part of element identifier
|
|
*/
|
|
void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val)
|
|
{
|
|
assert(obj);
|
|
strncpy((char *)obj->id.name, val, sizeof(obj->id.name));
|
|
}
|
|
|
|
/**
|
|
* \brief Set index part of CTL element identifier of a CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param val index part of element identifier
|
|
*/
|
|
void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->id.index = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Get value for an entry of a #SND_CTL_ELEM_TYPE_BOOLEAN CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param idx Entry index
|
|
* \return value for the entry
|
|
*/
|
|
int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx)
|
|
{
|
|
assert(obj);
|
|
assert(idx < sizeof(obj->value.integer.value) / sizeof(obj->value.integer.value[0]));
|
|
return obj->value.integer.value[idx];
|
|
}
|
|
|
|
/**
|
|
* \brief Get value for an entry of a #SND_CTL_ELEM_TYPE_INTEGER CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param idx Entry index
|
|
* \return value for the entry
|
|
*/
|
|
long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx)
|
|
{
|
|
assert(obj);
|
|
assert(idx < sizeof(obj->value.integer.value) / sizeof(obj->value.integer.value[0]));
|
|
return obj->value.integer.value[idx];
|
|
}
|
|
|
|
/**
|
|
* \brief Get value for an entry of a #SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param idx Entry index
|
|
* \return value for the entry
|
|
*/
|
|
long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx)
|
|
{
|
|
assert(obj);
|
|
assert(idx < sizeof(obj->value.integer64.value) / sizeof(obj->value.integer64.value[0]));
|
|
return obj->value.integer64.value[idx];
|
|
}
|
|
|
|
/**
|
|
* \brief Get value for an entry of a #SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param idx Entry index
|
|
* \return value for the entry
|
|
*/
|
|
unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx)
|
|
{
|
|
assert(obj);
|
|
assert(idx < sizeof(obj->value.enumerated.item) / sizeof(obj->value.enumerated.item[0]));
|
|
return obj->value.enumerated.item[idx];
|
|
}
|
|
|
|
/**
|
|
* \brief Get value for an entry of a #SND_CTL_ELEM_TYPE_BYTES CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param idx Entry index
|
|
* \return value for the entry
|
|
*/
|
|
unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx)
|
|
{
|
|
assert(obj);
|
|
assert(idx < sizeof(obj->value.bytes.data));
|
|
return obj->value.bytes.data[idx];
|
|
}
|
|
|
|
/**
|
|
* \brief Set value for an entry of a #SND_CTL_ELEM_TYPE_BOOLEAN CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param idx Entry index
|
|
* \param val value for the entry
|
|
*/
|
|
void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
|
|
{
|
|
assert(obj);
|
|
obj->value.integer.value[idx] = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set value for an entry of a #SND_CTL_ELEM_TYPE_INTEGER CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param idx Entry index
|
|
* \param val value for the entry
|
|
*/
|
|
void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
|
|
{
|
|
assert(obj);
|
|
obj->value.integer.value[idx] = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set value for an entry of a #SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param idx Entry index
|
|
* \param val value for the entry
|
|
*/
|
|
void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val)
|
|
{
|
|
assert(obj);
|
|
obj->value.integer64.value[idx] = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set value for an entry of a #SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param idx Entry index
|
|
* \param val value for the entry
|
|
*/
|
|
void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val)
|
|
{
|
|
assert(obj);
|
|
obj->value.enumerated.item[idx] = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set value for an entry of a #SND_CTL_ELEM_TYPE_BYTES CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param idx Entry index
|
|
* \param val value for the entry
|
|
*/
|
|
void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val)
|
|
{
|
|
assert(obj);
|
|
obj->value.bytes.data[idx] = val;
|
|
}
|
|
|
|
/**
|
|
* \brief Set CTL element #SND_CTL_ELEM_TYPE_BYTES value
|
|
* \param obj CTL handle
|
|
* \param data Bytes value
|
|
* \param size Size in bytes
|
|
*/
|
|
void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size)
|
|
{
|
|
assert(obj);
|
|
if (size >= sizeof(obj->value.bytes.data)) {
|
|
assert(0);
|
|
return;
|
|
}
|
|
memcpy(obj->value.bytes.data, data, size);
|
|
}
|
|
|
|
/**
|
|
* \brief Get value for a #SND_CTL_ELEM_TYPE_BYTES CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \return Pointer to CTL element value
|
|
*/
|
|
const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj)
|
|
{
|
|
assert(obj);
|
|
return obj->value.bytes.data;
|
|
}
|
|
|
|
/**
|
|
* \brief Get value for a #SND_CTL_ELEM_TYPE_IEC958 CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param ptr Pointer to returned CTL element value
|
|
*/
|
|
void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr)
|
|
{
|
|
assert(obj && ptr);
|
|
memcpy(ptr, &obj->value.iec958, sizeof(*ptr));
|
|
}
|
|
|
|
/**
|
|
* \brief Set value for a #SND_CTL_ELEM_TYPE_IEC958 CTL element id/value
|
|
* \param obj CTL element id/value
|
|
* \param ptr Pointer to CTL element value
|
|
*/
|
|
void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr)
|
|
{
|
|
assert(obj && ptr);
|
|
memcpy(&obj->value.iec958, ptr, sizeof(obj->value.iec958));
|
|
}
|
|
|