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// SPDX-License-Identifier: GPL-2.0
/*
* ALSA Virtual Soundcard
*
* core.h - Internal header for virtual ALSA card
*
* Copyright (C) 2010-2018 Fiberdyne Systems Pty Ltd
*/
#ifndef __AVIRT_CORE_INTERNAL_H__
#define __AVIRT_CORE_INTERNAL_H__
#include <avirt/core.h>
#include "utils.h"
struct avirt_core {
struct snd_card *card;
struct device *dev;
struct class *avirt_class;
struct config_group *stream_group;
unsigned int stream_count;
};
int __init __avirt_configfs_init(struct avirt_core *core);
void __exit __avirt_configfs_exit(struct avirt_core *core);
/**
* __avirt_card_register - Register the sound card to user space
* @return: 0 on success, negative ERRNO on failure
*/
int __avirt_card_register(void);
/**
* __avirt_stream_find_by_device - Get audio stream from device number
* @device: The PCM device number corresponding to the desired stream
* @return: The audio stream if found, or an error pointer otherwise
*/
struct avirt_stream *__avirt_stream_find_by_device(unsigned int device);
/**
* __avirt_stream_create - Create audio stream, including it's ALSA PCM device
* @name: The name designated to the audio stream
* @direction: The PCM direction (SNDRV_PCM_STREAM_PLAYBACK or
* SNDRV_PCM_STREAM_CAPTURE)
* @return: The newly created audio stream if successful, or an error pointer
*/
struct avirt_stream *__avirt_stream_create(const char *name, int direction);
#endif // __AVIRT_CORE_INTERNAL_H__
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