linux/sound/usb/line6/midi.h
Thomas Gleixner a10e763b87 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 372
Based on 1 normalized pattern(s):

  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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 135 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190531081036.435762997@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:37:10 +02:00

48 lines
1.1 KiB
C

/* 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