patch-2.1.23 linux/drivers/sbus/audio/audio.h

• Lines: 76
• Date: Sun Jan 26 12:07:17 1997
• Orig file: v2.1.22/linux/drivers/sbus/audio/audio.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.22/linux/drivers/sbus/audio/audio.h linux/drivers/sbus/audio/audio.h
@@ -0,0 +1,75 @@
+/*
+ * drivers/sbus/audio/audio.h
+ *
+ * Sparc Audio Midlayer
+ * Copyright (C) 1996 Thomas K. Dyas (tdyas@noc.rutgers.edu)
+ */
+
+#ifndef _AUDIO_H_
+#define _AUDIO_H_
+
+#ifdef __KERNEL__
+
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/wait.h>
+
+
+#define NR_SPARCAUDIO_DRIVERS 1
+
+
+struct sparcaudio_driver
+{
+	const char * name;
+	struct sparcaudio_operations *ops;
+	void *private;
+
+	/* Nonzero if the driver is busy. */
+	int busy;
+
+	/* Support for a circular queue of output buffers. */
+	__u8 **output_buffers;
+	size_t *output_sizes;
+	int num_output_buffers, output_front, output_rear, output_count, output_active;
+	struct wait_queue *output_write_wait, *output_drain_wait;
+};
+
+struct sparcaudio_operations
+{
+	int (*open)(struct inode *, struct file *, struct sparcaudio_driver *);
+	void (*release)(struct inode *, struct file *, struct sparcaudio_driver *);
+	int (*ioctl)(struct inode *, struct file *, unsigned int, unsigned long,
+		     struct sparcaudio_driver *);
+
+	/* Ask driver to begin playing a buffer. */
+	void (*start_output)(struct sparcaudio_driver *, __u8 * buffer, size_t count);
+
+	/* Ask driver to stop playing a buffer. */
+	void (*stop_output)(struct sparcaudio_driver *);
+
+	/* Set and get the audio encoding method. */
+	int (*set_encoding)(int encoding);
+	int (*get_encoding)(void);
+
+	/* Set and get the audio sampling rate (samples per second). */
+	int (*set_sampling_rate)(int sampling_rate);
+	int (*get_sampling_rate)(void);
+
+	/* Set and get the audio output port. */
+	int (*set_output_port)(int output_port);
+	int (*get_output_port)(void);
+
+	/* Set and get the audio input port. */
+	int (*set_input_port)(int input_port);
+	int (*get_input_port)(void);
+};
+
+extern int register_sparcaudio_driver(struct sparcaudio_driver *);
+extern int unregister_sparcaudio_driver(struct sparcaudio_driver *);
+extern void sparcaudio_output_done(void);
+extern int sparcaudio_init(void);
+extern int amd7930_init(void);
+
+#endif
+
+#endif