sound/usb/line6/midibuf.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Line 6 Linux USB driver
   4  *
   5  * Copyright (C) 2004-2010 Markus Grabner (line6@grabner-graz.at)
   6  */
   7
   8 #ifndef MIDIBUF_H
   9 #define MIDIBUF_H
  10
  11 #define LINE6_MIDIBUF_READ_TX 0
  12 #define LINE6_MIDIBUF_READ_RX 1
  13
  14 struct midi_buffer {
  15         unsigned char *buf;
  16         int size;
  17         int split;
  18         int pos_read, pos_write;
  19         int full;
  20         int command_prev;
  21 };
  22
  23 extern int line6_midibuf_bytes_used(struct midi_buffer *mb);
  24 extern int line6_midibuf_bytes_free(struct midi_buffer *mb);
  25 extern void line6_midibuf_destroy(struct midi_buffer *mb);
  26 extern int line6_midibuf_ignore(struct midi_buffer *mb, int length);
  27 extern int line6_midibuf_init(struct midi_buffer *mb, int size, int split);
  28 extern int line6_midibuf_read(struct midi_buffer *mb, unsigned char *data,
  29                               int length, int read_type);
  30 extern void line6_midibuf_reset(struct midi_buffer *mb);
  31 extern int line6_midibuf_write(struct midi_buffer *mb, unsigned char *data,
  32                                int length);
  33
  34 #endif