1/* 2 * Line6 Linux USB driver - 0.8.0 3 * 4 * Copyright (C) 2004-2009 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 16#include <sound/rawmidi.h> 17 18#include "midibuf.h" 19 20 21#define MIDI_BUFFER_SIZE 1024 22 23 24struct snd_line6_midi { 25 /** 26 Pointer back to the Line6 driver data structure. 27 */ 28 struct usb_line6 *line6; 29 30 /** 31 MIDI substream for receiving (or NULL if not active). 32 */ 33 struct snd_rawmidi_substream *substream_receive; 34 35 /** 36 MIDI substream for transmitting (or NULL if not active). 37 */ 38 struct snd_rawmidi_substream *substream_transmit; 39 40 /** 41 Number of currently active MIDI send URBs. 42 */ 43 int num_active_send_urbs; 44 45 /** 46 Spin lock to protect updates of send_urb. 47 */ 48 spinlock_t send_urb_lock; 49 50 /** 51 Spin lock to protect MIDI buffer handling. 52 */ 53 spinlock_t midi_transmit_lock; 54 55 /** 56 Wait queue for MIDI transmission. 57 */ 58 wait_queue_head_t send_wait; 59 60 /** 61 Bit mask for output MIDI channels. 62 */ 63 int midi_mask_transmit; 64 65 /** 66 Bit mask for input MIDI channels. 67 */ 68 int midi_mask_receive; 69 70 /** 71 Buffer for incoming MIDI stream. 72 */ 73 struct MidiBuffer midibuf_in; 74 75 /** 76 Buffer for outgoing MIDI stream. 77 */ 78 struct MidiBuffer midibuf_out; 79}; 80 81 82extern int line6_init_midi(struct usb_line6 *line6); 83extern void line6_midi_receive(struct usb_line6 *line6, unsigned char *data, 84 int length); 85 86 87#endif 88