1 files changed, 70 insertions, 0 deletions
diff --git a/core.h b/core.h
new file mode 100644
index 0000000..735df65
--- /dev/null
+++ b/core.h
@@ -0,0 +1,70 @@
+// 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;
+
+struct snd_avirt_core {
+	struct snd_card *card;
+	struct device *dev;
+	struct class *avirt_class;
+	struct config_group *stream_group;
+	unsigned int stream_count;
+	bool streams_sealed;
+};
+
+/**
+ * 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_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);
+
+#endif /* __SOUND_AVIRT_CORE_H */