1/*
 2 * Line 6 Linux USB driver
 3 *
 4 * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
 5 *
 6 *	This program is free software; you can redistribute it and/or
 7 *	modify it under the terms of the GNU General Public License as
 8 *	published by the Free Software Foundation, version 2.
 9 *
10 */
11
12#ifndef MIDI_H
13#define MIDI_H
14
15#include <sound/rawmidi.h>
16
17#include "midibuf.h"
18
19#define MIDI_BUFFER_SIZE 1024
20
21struct snd_line6_midi {
22	/* Pointer back to the Line 6 driver data structure */
23	struct usb_line6 *line6;
24
25	/* MIDI substream for receiving (or NULL if not active) */
26	struct snd_rawmidi_substream *substream_receive;
27
28	/* MIDI substream for transmitting (or NULL if not active) */
29	struct snd_rawmidi_substream *substream_transmit;
30
31	/* Number of currently active MIDI send URBs */
32	int num_active_send_urbs;
33
34	/* Spin lock to protect MIDI buffer handling */
35	spinlock_t lock;
36
37	/* Wait queue for MIDI transmission */
38	wait_queue_head_t send_wait;
39
40	/* Buffer for incoming MIDI stream */
41	struct midi_buffer midibuf_in;
42
43	/* Buffer for outgoing MIDI stream */
44	struct midi_buffer midibuf_out;
45};
46
47extern int line6_init_midi(struct usb_line6 *line6);
48extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data,
49			       int length);
50
51#endif