48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Line 6 Linux USB driver
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*
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* Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
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*/
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#ifndef MIDI_H
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#define MIDI_H
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#include <sound/rawmidi.h>
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#include "midibuf.h"
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#define MIDI_BUFFER_SIZE 1024
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struct snd_line6_midi {
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/* Pointer back to the Line 6 driver data structure */
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struct usb_line6 *line6;
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/* MIDI substream for receiving (or NULL if not active) */
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struct snd_rawmidi_substream *substream_receive;
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/* MIDI substream for transmitting (or NULL if not active) */
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struct snd_rawmidi_substream *substream_transmit;
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/* Number of currently active MIDI send URBs */
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int num_active_send_urbs;
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/* Spin lock to protect MIDI buffer handling */
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spinlock_t lock;
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/* Wait queue for MIDI transmission */
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wait_queue_head_t send_wait;
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/* Buffer for incoming MIDI stream */
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struct midi_buffer midibuf_in;
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/* Buffer for outgoing MIDI stream */
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struct midi_buffer midibuf_out;
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};
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extern int line6_init_midi(struct usb_line6 *line6);
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extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data,
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int length);
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#endif
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