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/*
* Line 6 Linux USB driver
*
* Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2.
*
*/
#ifndef MIDI_H
#define MIDI_H
#include <sound/rawmidi.h>
#include "midibuf.h"
#define MIDI_BUFFER_SIZE 1024
struct snd_line6_midi {
/**
Pointer back to the Line 6 driver data structure.
*/
struct usb_line6 *line6;
/**
MIDI substream for receiving (or NULL if not active).
*/
struct snd_rawmidi_substream *substream_receive;
/**
MIDI substream for transmitting (or NULL if not active).
*/
struct snd_rawmidi_substream *substream_transmit;
/**
Number of currently active MIDI send URBs.
*/
int num_active_send_urbs;
/**
Spin lock to protect updates of send_urb.
*/
spinlock_t send_urb_lock;
/**
Spin lock to protect MIDI buffer handling.
*/
spinlock_t midi_transmit_lock;
/**
Wait queue for MIDI transmission.
*/
wait_queue_head_t send_wait;
/**
Buffer for incoming MIDI stream.
*/
struct midi_buffer midibuf_in;
/**
Buffer for outgoing MIDI stream.
*/
struct midi_buffer midibuf_out;
};
extern int line6_init_midi(struct usb_line6 *line6);
extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data,
int length);
#endif
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