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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Line 6 Linux USB driver
*
* Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
*/
#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 MIDI buffer handling */
spinlock_t 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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