/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Line 6 Linux USB driver
 *
 * Copyright (C) 2004-2010 Markus Grabner (line6@grabner-graz.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