| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Line 6 Linux USB driver |
| 3 | * |
| 4 | * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License as |
| 8 | * published by the Free Software Foundation, version 2. |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #ifndef MIDI_H |
| 13 | #define MIDI_H |
| 14 | |
| 15 | #include <sound/rawmidi.h> |
| 16 | |
| 17 | #include "midibuf.h" |
| 18 | |
| 19 | #define MIDI_BUFFER_SIZE 1024 |
| 20 | |
| 21 | struct snd_line6_midi { |
| 22 | /* Pointer back to the Line 6 driver data structure */ |
| 23 | struct usb_line6 *line6; |
| 24 | |
| 25 | /* MIDI substream for receiving (or NULL if not active) */ |
| 26 | struct snd_rawmidi_substream *substream_receive; |
| 27 | |
| 28 | /* MIDI substream for transmitting (or NULL if not active) */ |
| 29 | struct snd_rawmidi_substream *substream_transmit; |
| 30 | |
| 31 | /* Number of currently active MIDI send URBs */ |
| 32 | int num_active_send_urbs; |
| 33 | |
| 34 | /* Spin lock to protect MIDI buffer handling */ |
| 35 | spinlock_t lock; |
| 36 | |
| 37 | /* Wait queue for MIDI transmission */ |
| 38 | wait_queue_head_t send_wait; |
| 39 | |
| 40 | /* Buffer for incoming MIDI stream */ |
| 41 | struct midi_buffer midibuf_in; |
| 42 | |
| 43 | /* Buffer for outgoing MIDI stream */ |
| 44 | struct midi_buffer midibuf_out; |
| 45 | }; |
| 46 | |
| 47 | extern int line6_init_midi(struct usb_line6 *line6); |
| 48 | extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data, |
| 49 | int length); |
| 50 | |
| 51 | #endif |