meta-agl-demo - meta-agl-demo layer (demo/staging/"one-shot")

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// SPDX-License-Identifier: GPL-2.0 /* * AVIRT - ALSA Virtual Soundcard * * Copyright (c) 2010-2018 Fiberdyne Systems Pty Ltd * * core.h - AVIRT internal header */ #ifndef __SOUND_AVIRT_CORE_H #define __SOUND_AVIRT_CORE_H #include <sound/avirt.h> #include "utils.h" extern struct snd_pcm_ops pcm_ops_avirt; struct snd_avirt_core { int version[3]; struct snd_card *card; struct device *dev; struct class *class; struct platform_device *plat_dev; struct config_group *stream_group; struct config_group *route_group; unsigned int stream_count; bool streams_sealed; }; struct snd_avirt_audiopath_obj { struct kobject kobj; struct list_head list; struct snd_avirt_audiopath *path; }; /** * snd_avirt_configfs_init - Initialise the configfs system * @core: The snd_avirt_core pointer * @return: 0 on success, negative ERRNO on failure */ int __init snd_avirt_configfs_init(struct snd_avirt_core *core); /** * snd_avirt_configfs_exit - Clean up and exit the configfs system * @core: The snd_avirt_core pointer */ void __exit snd_avirt_configfs_exit(struct snd_avirt_core *core); /** * snd_avirt_sysfs_init - Initialise the sysfs system * @core: The snd_avirt_core pointer * @return: 0 on success, negative ERRNO on failure */ int __init snd_avirt_sysfs_init(struct snd_avirt_core *core); /** * snd_avirt_sysfs_exit - Clean up and exit the sysfs system * @core: The snd_avirt_core pointer */ void __exit snd_avirt_sysfs_exit(struct snd_avirt_core *core); /** * snd_avirt_audiopath_obj - creates an Audio Path object, assigns the kset * and registers it with sysfs. * @uid: Unique ID of the Audio Path * @return: Pointer to the Audio Path object or NULL if it failed. */ struct snd_avirt_audiopath_obj *snd_avirt_audiopath_create_obj(const char *uid); /** * snd_avirt_audiopath_destroy_obj - destroys an Audio Path object, deregisters * it with sysfs * @name: the Audio Path object */ void snd_avirt_audiopath_destroy_obj(struct snd_avirt_audiopath_obj *p); /** * snd_avirt_streams_seal - Register the sound card to user space * @return: 0 on success, negative ERRNO on failure */ int snd_avirt_streams_seal(void); /** * snd_avirt_streams_sealed - Check if the streams have been sealed or not * @return: true if sealed, false otherwise */ bool snd_avirt_streams_sealed(void); /** * snd_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 snd_avirt_stream *snd_avirt_stream_find_by_device(unsigned int device); /** * snd_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 snd_avirt_stream *snd_avirt_stream_create(const char *name, int direction); /** * snd_avirt_stream_set_map - Set Audio Path mapping for a given stream * @stream: The stream to assign the mapping to. * @map: The Audio Path UID to map the stream to. * @return: 0 on success, negative ERRNO on failure */ int snd_avirt_stream_set_map(struct snd_avirt_stream *stream, const char *map); /** * snd_avirt_audiopath_get - retrieves the Audio Path by it's UID * @uid: Unique ID for the Audio Path * @return: Corresponding Audio Path */ struct snd_avirt_audiopath *snd_avirt_audiopath_get(const char *uid); /** * snd_avirt_route_create - Create audio route * @name: The name designated to the audio route * @direction: The PCM direction (SNDRV_PCM_STREAM_PLAYBACK or * SNDRV_PCM_STREAM_CAPTURE) * @return: The newly created audio route if successful, or an error pointer */ struct snd_avirt_route *snd_avirt_route_create(const char *name, int direction); /** * snd_avirt_stream_from_config_item - Convert config_item to a snd_avirt_stream * @item: The config_item to convert from * @return: The item's snd_avirt_stream if successful, NULL otherwise */ static inline struct snd_avirt_stream * snd_avirt_stream_from_config_item(struct config_item *item) { return item ? container_of(item, struct snd_avirt_stream, item) : NULL; } /** * snd_avirt_route_from_config_item - Convert config_item to a snd_avirt_route * @item: The config_item to convert from * @return: The item's snd_avirt_stream if successful, NULL otherwise */ static inline struct snd_avirt_route * snd_avirt_route_from_config_item(struct config_item *item) { return item ? container_of(item, struct snd_avirt_route, item) : NULL; } #endif /* __SOUND_AVIRT_CORE_H */


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