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 /** 23 Pointer back to the Line 6 driver data structure. 24 */ 25 struct usb_line6 *line6; 26 27 /** 28 MIDI substream for receiving (or NULL if not active). 29 */ 30 struct snd_rawmidi_substream *substream_receive; 31 32 /** 33 MIDI substream for transmitting (or NULL if not active). 34 */ 35 struct snd_rawmidi_substream *substream_transmit; 36 37 /** 38 Number of currently active MIDI send URBs. 39 */ 40 int num_active_send_urbs; 41 42 /** 43 Spin lock to protect updates of send_urb. 44 */ 45 spinlock_t send_urb_lock; 46 47 /** 48 Spin lock to protect MIDI buffer handling. 49 */ 50 spinlock_t midi_transmit_lock; 51 52 /** 53 Wait queue for MIDI transmission. 54 */ 55 wait_queue_head_t send_wait; 56 57 /** 58 Buffer for incoming MIDI stream. 59 */ 60 struct midi_buffer midibuf_in; 61 62 /** 63 Buffer for outgoing MIDI stream. 64 */ 65 struct midi_buffer midibuf_out; 66 }; 67 68 extern int line6_init_midi(struct usb_line6 *line6); 69 extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data, 70 int length); 71 72 #endif 73