linux/sound/usb/line6/midibuf.h
Artem Egorkine 8508fa2e74 ALSA: line6: correct midi status byte when receiving data from podxt
A PODxt device sends 0xb2, 0xc2 or 0xf2 as a status byte for MIDI
messages over USB that should otherwise have a 0xb0, 0xc0 or 0xf0
status byte. This is usually corrected by the driver on other OSes.

This fixes MIDI sysex messages sent by PODxt.

[ tiwai: fixed white spaces ]

Signed-off-by: Artem Egorkine <arteme@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20221225105728.1153989-1-arteme@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2022-12-26 09:06:19 +01:00

35 lines
977 B
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Line 6 Linux USB driver
*
* Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
*/
#ifndef MIDIBUF_H
#define MIDIBUF_H
#define LINE6_MIDIBUF_READ_TX 0
#define LINE6_MIDIBUF_READ_RX 1
struct midi_buffer {
unsigned char *buf;
int size;
int split;
int pos_read, pos_write;
int full;
int command_prev;
};
extern int line6_midibuf_bytes_used(struct midi_buffer *mb);
extern int line6_midibuf_bytes_free(struct midi_buffer *mb);
extern void line6_midibuf_destroy(struct midi_buffer *mb);
extern int line6_midibuf_ignore(struct midi_buffer *mb, int length);
extern int line6_midibuf_init(struct midi_buffer *mb, int size, int split);
extern int line6_midibuf_read(struct midi_buffer *mb, unsigned char *data,
int length, int read_type);
extern void line6_midibuf_reset(struct midi_buffer *mb);
extern int line6_midibuf_write(struct midi_buffer *mb, unsigned char *data,
int length);
#endif