Public push of AVIRT.

Follow readme for building in/out of tree for Ubuntu/AGL/etc.

Signed-off-by: James O'Shannessy <james.oshannessy@fiberdyne.com.au>

1 files changed, 64 insertions, 0 deletions

diff --git a/core.h b/core.h
new file mode 100644
index 0000000..5eb6026
--- /dev/null
+++ b/core.h
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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * ALSA Virtual Soundcard
+ *
+ * core.h - System-level header for virtual ALSA card
+ *
+ * Copyright (C) 2010-2018 Fiberdyne Systems Pty Ltd
+ */
+
+#ifndef __AVIRT_CORE_H__
+#define __AVIRT_CORE_H__
+
+#include <sound/pcm.h>
+
+/**
+ * PCM buffer complete callback
+ * 
+ * These are called from the audiopath when a PCM buffer has completed, and 
+ * new data can be submitted/retrieved
+ */
+typedef int (*avirt_buff_complete)(struct snd_pcm_substream *substream);
+
+struct avirt_audiopath {
+	const char *name;
+	unsigned version[3];
+	int value;
+	struct snd_pcm_hardware *hw;
+	struct snd_pcm_ops *pcm_ops;
+	unsigned blocksize;
+
+	void *context;
+};
+
+struct avirt_coreinfo {
+	unsigned version[3];
+	unsigned playback_num;
+	unsigned capture_num;
+
+	avirt_buff_complete pcm_buff_complete;
+};
+
+/**
+ * avirt_register_audiopath - register Audio Path with ALSA virtual driver
+ * @audiopath: Audio Path to be registered
+ * @core: ALSA virtual driver core info
+ * @return: 0 on success or error code otherwise
+ */
+int avirt_register_audiopath(struct avirt_audiopath *audiopath,
+			     struct avirt_coreinfo **coreinfo);
+
+/**
+ * avirt_deregister_audiopath - deregister Audio Path with ALSA virtual driver
+ * @audiopath: Audio Path to be deregistered
+ * @return: 0 on success or error code otherwise
+ */
+int avirt_deregister_audiopath(struct avirt_audiopath *audiopath);
+
+/**
+ * avirt_get_current_audiopath - retrieves the current Audio Path
+ * @return: Current Audio Path
+ */
+struct avirt_audiopath *avirt_get_current_audiopath(void);
+
+#endif // __AVIRT_CORE_H__