til: add preliminary audio backend

This is an early implementation of something resembling an audio
backend for rototiller/libtil.

The assumption for now is that everything will use signed 16-bit
native-endian stereo output @ 44.1khz.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/til_audio_context.h b/src/til_audio_context.h
new file mode 100644
index 0000000..8efdbac
--- /dev/null
+++ b/src/til_audio_context.h
@@ -0,0 +1,21 @@
+#ifndef _TIL_AUDIO_CONTEXT_H
+#define _TIL_AUDIO_CONTEXT_H
+
+/* XXX: this isn't intended to be used outside of til_audio.[ch] */
+
+#include <stddef.h>
+
+typedef struct til_setup_t til_setup_t;
+typedef struct til_audio_ops_t til_audio_ops_t;
+
+typedef struct til_audio_context_t {
+	til_setup_t		*setup;
+	const til_audio_ops_t	*ops;
+	const til_audio_hooks_t	*hooks;
+	void			*hooks_context;
+} til_audio_context_t;
+
+void * til_audio_context_new(const til_audio_ops_t *ops, size_t size, til_setup_t *setup);
+til_audio_context_t * til_audio_context_free(til_audio_context_t *audio_context);
+
+#endif