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