1/*
 2 * Line6 Linux USB driver - 0.9.1beta
 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	/**
23		 Pointer back to the Line6 driver data structure.
24	*/
25	struct usb_line6 *line6;
26
27	/**
28		 MIDI substream for receiving (or NULL if not active).
29	*/
30	struct snd_rawmidi_substream *substream_receive;
31
32	/**
33		 MIDI substream for transmitting (or NULL if not active).
34	*/
35	struct snd_rawmidi_substream *substream_transmit;
36
37	/**
38		 Number of currently active MIDI send URBs.
39	*/
40	int num_active_send_urbs;
41
42	/**
43		 Spin lock to protect updates of send_urb.
44	*/
45	spinlock_t send_urb_lock;
46
47	/**
48		 Spin lock to protect MIDI buffer handling.
49	*/
50	spinlock_t midi_transmit_lock;
51
52	/**
53		 Wait queue for MIDI transmission.
54	*/
55	wait_queue_head_t send_wait;
56
57	/**
58		 Bit mask for output MIDI channels.
59	*/
60	int midi_mask_transmit;
61
62	/**
63		 Bit mask for input MIDI channels.
64	*/
65	int midi_mask_receive;
66
67	/**
68		 Buffer for incoming MIDI stream.
69	*/
70	struct MidiBuffer midibuf_in;
71
72	/**
73		 Buffer for outgoing MIDI stream.
74	*/
75	struct MidiBuffer midibuf_out;
76};
77
78extern int line6_init_midi(struct usb_line6 *line6);
79extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data,
80			       int length);
81
82#endif