From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- sound/usb/line6/midi.h | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 sound/usb/line6/midi.h (limited to 'sound/usb/line6/midi.h') diff --git a/sound/usb/line6/midi.h b/sound/usb/line6/midi.h new file mode 100644 index 000000000..cf82d69e2 --- /dev/null +++ b/sound/usb/line6/midi.h @@ -0,0 +1,51 @@ +/* + * Line 6 Linux USB driver + * + * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) + * + * 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. + * + */ + +#ifndef MIDI_H +#define MIDI_H + +#include + +#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 -- cgit v1.2.3