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/* snd_utils.h
** Copyright (c) 2019, The Linux Foundation.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above
** copyright notice, this list of conditions and the following
** disclaimer in the documentation and/or other materials provided
** with the distribution.
** * Neither the name of The Linux Foundation nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
** ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
** BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
** BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
** OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
** IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**/
#ifndef TINYALSA_SRC_SND_CARD_UTILS_H
#define TINYALSA_SRC_SND_CARD_UTILS_H
#include <tinyalsa/plugin.h>
#include <dlfcn.h>
/** Encapsulates the pcm device definition from
* the sound card definition configuration file.
*/
struct snd_node {
/** Pointer the card definition */
void *card_node;
/** Pointer to device definition, either PCM or MIXER device */
void *dev_node;
/** Pointer to the sound card parser library */
void *dl_hdl;
/** A pointer to the operations structure. */
const struct snd_node_ops* ops;
};
enum snd_node_type {
SND_NODE_TYPE_HW = 0,
SND_NODE_TYPE_PLUGIN,
SND_NODE_TYPE_INVALID,
};
enum {
NODE_PCM,
NODE_MIXER
};
struct snd_node *snd_utils_open_pcm(unsigned int card, unsigned int device);
struct snd_node *snd_utils_open_mixer(unsigned int card);
void snd_utils_close_dev_node(struct snd_node *node);
enum snd_node_type snd_utils_get_node_type(struct snd_node *node);
int snd_utils_get_int(struct snd_node *node, const char *prop, int *val);
int snd_utils_get_str(struct snd_node *node, const char *prop, char **val);
#endif /* end of TINYALSA_SRC_SND_CARD_UTILS_H */
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