sysex.c

   1 /* -*- Mode: C ; c-basic-offset: 2 -*- */
   2 /*****************************************************************************
   3  *
   4  *   This file is part of gmidimonitor
   5  *
   6  *   Copyright (C) 2005,2006,2007,2008,2011 Nedko Arnaudov <nedko@arnaudov.name>
   7  *
   8  *   This program is free software; you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License as published by
  10  *   the Free Software Foundation; version 2 of the License
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  *****************************************************************************/
  22
  23 #include <gtk/gtk.h>
  24
  25 #include "sysex.h"
  26
  27 /* General MMC decoding, as seen at http://www.borg.com/~jglatt/tech/mmc.htm and
  28    extended from "Advanced User Guide for MK-449C MIDI keyboard" info */
  29 void
  30 decode_sysex(
  31   guint8 * buffer,
  32   size_t buffer_size,
  33   GString * msg_str_ptr)
  34 {
  35   const char * mmc_command_name;
  36   size_t i;
  37
  38   if (buffer_size == 6 &&
  39       buffer[0] == 0xF0 &&
  40       buffer[1] == 0x7F &&
  41       buffer[3] == 0x06 &&
  42       buffer[5] == 0xF7)
  43   {
  44     switch (buffer[4])
  45     {
  46     case 1:
  47       mmc_command_name = "Stop";
  48       break;
  49     case 2:
  50       mmc_command_name = "Play";
  51       break;
  52     case 3:
  53       mmc_command_name = "Deferred Play";
  54       break;
  55     case 4:
  56       mmc_command_name = "Fast Forward";
  57       break;
  58     case 5:
  59       mmc_command_name = "Rewind";
  60       break;
  61     case 6:
  62       mmc_command_name = "Record Strobe (Punch In)";
  63       break;
  64     case 7:
  65       mmc_command_name = "Record Exit (Punch Out)";
  66       break;
  67     case 8:
  68       mmc_command_name = "Record Pause";
  69       break;
  70     case 9:
  71       mmc_command_name = "Pause";
  72       break;
  73     case 10:
  74       mmc_command_name = "Eject";
  75       break;
  76     case 11:
  77       mmc_command_name = "Chase";
  78       break;
  79     case 12:
  80       mmc_command_name = "Command Error Reset";
  81       break;
  82     case 13:
  83       mmc_command_name = "Reset";
  84       break;
  85     default:
  86       goto generic_sysex;
  87     }
  88     g_string_sprintf(
  89       msg_str_ptr,
  90       "MMC %s, for ",
  91       mmc_command_name);
  92
  93     if (buffer[2] == 127)
  94     {
  95       g_string_append(
  96         msg_str_ptr,
  97         "all devices");
  98     }
  99     else
 100     {
 101       g_string_append_printf(
 102         msg_str_ptr,
 103         "device %u",
 104         (unsigned int)(buffer[2]));
 105     }
 106   }
 107   /* The goto MMC message, as seen at http://www.borg.com/~jglatt/tech/mmc.htm */
 108   else if (buffer_size == 13 &&
 109            buffer[0] == 0xF0 &&
 110            buffer[1] == 0x7F &&
 111            buffer[3] == 0x06 &&
 112            buffer[4] == 0x44 &&
 113            buffer[5] == 0x06 &&
 114            buffer[6] == 0x01 &&
 115            buffer[12] == 0xF7)
 116   {
 117     g_string_sprintf(
 118       msg_str_ptr,
 119       "MMC goto %u:%u:%u/%u:%u",
 120       (unsigned int)(buffer[7] & 0x1F), /* fps encoding */
 121       (unsigned int)(buffer[8]),
 122       (unsigned int)(buffer[9]),
 123       (unsigned int)(buffer[10] & 0x1F), /* no fps > 32, but bit 5 looks used for something */
 124       (unsigned int)(buffer[11]));
 125
 126     switch (buffer[7] & 0x60)
 127     {
 128     case 0:
 129       g_string_append(
 130         msg_str_ptr,
 131         ", 24 fps");
 132       break;
 133     case 1:
 134       g_string_append(
 135         msg_str_ptr,
 136         ", 25 fps");
 137       break;
 138     case 2:
 139       g_string_append(
 140         msg_str_ptr,
 141         ", 29.97 fps");
 142       break;
 143     case 3:
 144       g_string_append(
 145         msg_str_ptr,
 146         ", 30 fps");
 147       break;
 148     }
 149
 150     if (buffer[2] == 127)
 151     {
 152       g_string_append(
 153         msg_str_ptr,
 154         ", for all devices");
 155     }
 156     else
 157     {
 158       g_string_append_printf(
 159         msg_str_ptr,
 160         ", for device %u",
 161         (unsigned int)(buffer[2]));
 162     }
 163   }
 164   else
 165   {
 166   generic_sysex:
 167     g_string_sprintf(
 168       msg_str_ptr,
 169       "SYSEX with size %u:",
 170       (unsigned int)buffer_size);
 171     for (i = 0 ; i < buffer_size ; i++)
 172     {
 173       g_string_append_printf(
 174         msg_str_ptr,
 175         " %02X",
 176         (unsigned int)(buffer[i]));
 177     }
 178   }
 179 }