1 | //midi.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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5 | * |
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6 | * This file is part of roard a part of RoarAudio, |
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7 | * a cross-platform sound system for both, home and professional use. |
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8 | * See README for details. |
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9 | * |
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10 | * This file is free software; you can redistribute it and/or modify |
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11 | * it under the terms of the GNU General Public License version 3 |
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12 | * as published by the Free Software Foundation. |
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13 | * |
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14 | * RoarAudio is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | * GNU General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU General Public License |
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20 | * along with this software; see the file COPYING. If not, write to |
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21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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22 | * |
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23 | */ |
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24 | |
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25 | #include "roard.h" |
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26 | |
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27 | #if defined(ROAR_HAVE_IO_POSIX) && !defined(ROAR_TARGET_WIN32) |
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28 | #define _HAVE_CONSOLE |
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29 | #endif |
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30 | |
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31 | int midi_init (void) { |
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32 | |
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33 | if ( midi_cb_init() == -1 ) { |
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34 | ROAR_WARN("Can not initialize MIDI subsystem component CB"); |
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35 | } |
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36 | |
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37 | if ( midi_clock_init() == -1 ) { |
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38 | ROAR_WARN("Can not initialize MIDI subsystem component clock"); |
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39 | } |
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40 | |
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41 | g_midi_mess.buf = NULL; |
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42 | |
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43 | return 0; |
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44 | } |
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45 | |
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46 | int midi_free (void) { |
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47 | return midi_cb_free(); |
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48 | } |
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49 | |
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50 | int midi_update(void) { |
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51 | |
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52 | if ( g_midi_clock.stream != -1 ) |
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53 | midi_check_bridge(g_midi_clock.stream); |
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54 | |
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55 | return midi_cb_update(); |
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56 | } |
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57 | |
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58 | int midi_reinit(void) { |
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59 | |
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60 | if ( g_midi_mess.buf != NULL ) |
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61 | roar_buffer_free(g_midi_mess.buf); |
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62 | |
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63 | g_midi_mess.buf = NULL; |
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64 | |
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65 | return 0; |
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66 | } |
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67 | |
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68 | // STREAMS: |
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69 | |
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70 | int midi_check_stream (int id) { |
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71 | struct roar_stream * s; |
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72 | struct roar_stream_server * ss; |
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73 | struct roar_buffer * b; |
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74 | char * buf; |
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75 | ssize_t len; |
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76 | int i; |
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77 | |
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78 | if ( g_streams[id] == NULL ) |
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79 | return -1; |
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80 | |
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81 | ROAR_DBG("midi_check_stream(id=%i) = ?", id); |
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82 | |
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83 | s = ROAR_STREAM(ss = g_streams[id]); |
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84 | |
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85 | if ( s->dir == ROAR_DIR_BRIDGE ) |
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86 | return midi_check_bridge(id); |
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87 | |
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88 | switch (s->info.codec) { |
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89 | case ROAR_CODEC_MIDI: |
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90 | break; |
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91 | default: |
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92 | streams_delete(id); |
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93 | return -1; |
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94 | } |
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95 | |
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96 | if ( roar_buffer_new(&b, MIDI_READ_SIZE) == -1 ) { |
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97 | ROAR_ERR("midi_check_stream(*): Can not alloc buffer space!"); |
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98 | ROAR_DBG("midi_check_stream(*) = -1"); |
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99 | return -1; |
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100 | } |
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101 | |
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102 | roar_buffer_get_data(b, (void **)&buf); |
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103 | |
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104 | if ( (len = stream_vio_s_read(ss, buf, MIDI_READ_SIZE)) < 1 ) { |
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105 | streams_delete(id); |
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106 | roar_buffer_free(b); |
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107 | return -1; |
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108 | } |
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109 | |
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110 | roar_buffer_set_len(b, len); |
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111 | |
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112 | if ( stream_add_buffer(id, b) == -1 ) { |
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113 | roar_buffer_free(b); |
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114 | streams_delete(id); |
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115 | return -1; |
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116 | } |
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117 | |
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118 | for (i = 0; i < ROAR_STREAMS_MAX; i++) { |
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119 | if ( g_streams[i] != NULL && ROAR_STREAM(g_streams[i])->pos_rel_id == id ) { |
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120 | if ( ROAR_STREAM(g_streams[i])->dir == ROAR_DIR_THRU ) { |
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121 | if ( stream_vio_write(i, buf, len) != len ) { |
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122 | streams_delete(i); |
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123 | } |
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124 | } |
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125 | } |
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126 | } |
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127 | |
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128 | switch (s->info.codec) { |
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129 | case ROAR_CODEC_MIDI: |
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130 | return midi_conv_midi2mes(id); |
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131 | break; |
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132 | default: |
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133 | streams_delete(id); |
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134 | return -1; |
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135 | } |
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136 | |
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137 | return 0; |
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138 | } |
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139 | |
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140 | int midi_send_stream (int id) { |
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141 | struct roar_stream * s; |
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142 | struct roar_stream_server * ss; |
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143 | |
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144 | if ( g_streams[id] == NULL ) |
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145 | return -1; |
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146 | |
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147 | ROAR_DBG("midi_send_stream(id=%i) = ?", id); |
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148 | |
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149 | s = ROAR_STREAM(ss = g_streams[id]); |
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150 | |
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151 | switch (s->info.codec) { |
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152 | default: |
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153 | streams_delete(id); |
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154 | return -1; |
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155 | } |
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156 | |
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157 | return 0; |
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158 | } |
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159 | |
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160 | int midi_conv_midi2mes (int id) { |
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161 | unsigned char * data; |
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162 | struct roar_stream * s; |
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163 | struct roar_stream_server * ss; |
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164 | struct roar_buffer * buf = NULL; |
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165 | struct midi_message * mes = NULL; |
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166 | size_t need = 0, have = 0; |
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167 | int alive = 1; |
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168 | |
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169 | if ( g_streams[id] == NULL ) |
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170 | return -1; |
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171 | |
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172 | ROAR_DBG("midi_conv_midi2mes(id=%i) = ?", id); |
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173 | |
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174 | s = ROAR_STREAM(ss = g_streams[id]); |
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175 | |
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176 | while (ss->buffer != NULL && alive) { |
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177 | if ( roar_buffer_get_data(ss->buffer, (void**)&data) == -1 ) { |
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178 | alive = 0; |
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179 | continue; |
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180 | } |
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181 | |
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182 | if ( roar_buffer_get_len(ss->buffer, &have) == -1 ) { |
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183 | alive = 0; |
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184 | continue; |
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185 | } |
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186 | |
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187 | while (have && alive) { |
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188 | printf("%.2x=", *data); |
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189 | if ( *data & 0x80 ) { |
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190 | if ( buf != NULL ) { |
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191 | midi_add_buf(id, buf); |
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192 | buf = NULL; |
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193 | } |
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194 | |
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195 | need = 0; |
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196 | printf("S\n"); |
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197 | if ( midi_new_bufmes(&buf, &mes) == -1 ) { |
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198 | alive = 0; |
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199 | continue; |
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200 | } |
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201 | |
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202 | if (*data == MIDI_TYPE_CLOCK_TICK || *data == MIDI_TYPE_CLOCK_START || *data == MIDI_TYPE_CLOCK_STOP ) { |
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203 | mes->type = *data; |
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204 | } else { |
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205 | mes->type = *data & 0xF0; |
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206 | mes->channel = *data & 0x0F; |
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207 | switch (*data & 0xF0) { |
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208 | case MIDI_TYPE_NOTE_ON: |
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209 | case MIDI_TYPE_NOTE_OFF: |
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210 | need = 2; |
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211 | break; |
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212 | case MIDI_TYPE_PA: |
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213 | need = 2; |
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214 | break; |
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215 | case MIDI_TYPE_CONTROLER: |
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216 | need = 2; |
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217 | break; |
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218 | case MIDI_TYPE_PROGRAM: |
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219 | need = 1; |
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220 | break; |
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221 | case MIDI_TYPE_MA: |
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222 | need = 1; |
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223 | break; |
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224 | case MIDI_TYPE_PB: |
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225 | case MIDI_TYPE_SYSEX: |
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226 | need = 1; |
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227 | break; |
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228 | } |
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229 | } |
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230 | |
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231 | } else { |
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232 | printf("D\n"); |
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233 | |
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234 | if ( mes == NULL ) { |
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235 | ROAR_WARN("midi_conv_midi2mes(id=%i): Lost sync.", id); |
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236 | data++; |
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237 | have--; |
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238 | continue; |
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239 | } |
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240 | |
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241 | switch (mes->type) { |
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242 | case MIDI_TYPE_NOTE_ON: |
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243 | case MIDI_TYPE_NOTE_OFF: |
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244 | if ( need == 2 ) { |
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245 | mes->kk = *data; |
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246 | } else { |
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247 | mes->vv = *data; |
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248 | } |
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249 | break; |
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250 | case MIDI_TYPE_PA: |
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251 | case MIDI_TYPE_CONTROLER: |
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252 | case MIDI_TYPE_PROGRAM: |
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253 | case MIDI_TYPE_MA: |
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254 | case MIDI_TYPE_PB: |
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255 | case MIDI_TYPE_SYSEX: |
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256 | break; |
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257 | } |
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258 | |
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259 | if ( need ) |
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260 | need--; |
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261 | } |
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262 | data++; |
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263 | have--; |
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264 | } |
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265 | |
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266 | if ( need ) { |
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267 | ROAR_ERR("midi_conv_midi2mes(*): FIXME: BUG!!! Need to restore buffer here with corrected length"); |
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268 | } else if ( !have ) { |
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269 | roar_buffer_next(&(ss->buffer)); |
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270 | } |
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271 | |
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272 | if ( need && buf != NULL ) { |
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273 | roar_buffer_free(buf); |
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274 | buf = NULL; |
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275 | } else if ( buf != NULL ) { |
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276 | midi_add_buf(id, buf); |
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277 | buf = NULL; |
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278 | } |
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279 | } |
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280 | |
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281 | return 0; |
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282 | } |
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283 | |
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284 | int midi_conv_mes2midi (int id) { |
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285 | return -1; |
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286 | } |
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287 | |
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288 | int midi_new_bufmes (struct roar_buffer ** buf, struct midi_message ** mes) { |
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289 | if ( buf == NULL || mes == NULL ) |
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290 | return -1; |
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291 | |
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292 | *buf = (void*)(*mes = NULL); |
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293 | |
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294 | if ( roar_buffer_new(buf, sizeof(struct midi_message)) == -1 ) |
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295 | return -1; |
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296 | |
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297 | if ( roar_buffer_get_data(*buf, (void**)mes) == -1 ) { |
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298 | roar_buffer_free(*buf); |
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299 | *buf = (void*)(*mes = NULL); |
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300 | return -1; |
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301 | } |
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302 | |
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303 | memset((void*)*mes, 0, sizeof(struct midi_message)); |
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304 | |
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305 | (*mes)->type = MIDI_TYPE_NONE; |
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306 | |
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307 | return 0; |
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308 | } |
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309 | |
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310 | int midi_add_buf (int id, struct roar_buffer * buf) { |
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311 | struct midi_message * mes; |
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312 | |
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313 | if ( id == -1 || buf == NULL ) |
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314 | return -1; |
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315 | |
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316 | if ( roar_buffer_get_data(buf, (void**)&mes) == -1 ) |
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317 | return -1; |
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318 | |
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319 | ROAR_WARN("midi_add_buf(id=%i, buf=%p) = ?", id, buf); |
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320 | ROAR_WARN("midi_add_buf(*): MIDI Message of Type 0x%.2X", mes->type); |
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321 | ROAR_WARN("midi_add_buf(*): Channel: %i", mes->channel); |
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322 | ROAR_WARN("midi_add_buf(*): flags=0x%.2X", mes->flags); |
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323 | ROAR_WARN("midi_add_buf(*): kk=0x%.2X, vv=0x%.2X", mes->kk, mes->vv); |
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324 | |
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325 | if ( g_midi_mess.buf == NULL ) { |
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326 | g_midi_mess.buf = buf; |
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327 | } else { |
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328 | roar_buffer_add(g_midi_mess.buf, buf); |
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329 | } |
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330 | |
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331 | return 0; |
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332 | } |
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333 | |
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334 | // bridges: |
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335 | int midi_check_bridge (int id) { |
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336 | |
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337 | ROAR_DBG("midi_check_bridge(id=%i) = ?", id); |
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338 | |
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339 | if ( id == g_midi_clock.stream ) { |
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340 | midi_clock_tick(); |
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341 | |
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342 | return 0; |
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343 | } |
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344 | |
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345 | return -1; |
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346 | } |
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347 | |
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348 | // clock: |
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349 | |
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350 | int midi_clock_init (void) { |
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351 | struct roar_stream * s; |
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352 | struct roar_stream_server * ss; |
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353 | |
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354 | if ( (g_midi_clock.stream = streams_new()) == -1 ) { |
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355 | ROAR_WARN("Error while initializing MIDI subsystem component clock"); |
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356 | return -1; |
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357 | } |
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358 | |
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359 | midi_vio_set_dummy(g_midi_clock.stream); |
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360 | |
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361 | streams_get(g_midi_clock.stream, &ss); |
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362 | s = ROAR_STREAM(ss); |
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363 | |
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364 | memcpy(&(s->info), g_sa, sizeof(struct roar_audio_info)); |
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365 | |
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366 | s->pos_rel_id = g_midi_clock.stream; |
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367 | |
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368 | s->info.codec = ROAR_CODEC_MIDI; |
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369 | ss->codec_orgi = ROAR_CODEC_MIDI; |
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370 | |
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371 | s->info.channels = 0; |
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372 | s->info.rate = MIDI_RATE; |
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373 | s->info.bits = 8; |
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374 | |
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375 | if ( streams_set_dir(g_midi_clock.stream, ROAR_DIR_BRIDGE, 1) == -1 ) { |
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376 | ROAR_WARN("Error while initializing MIDI subsystem component clock"); |
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377 | return -1; |
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378 | } |
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379 | |
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380 | streams_set_name(g_midi_clock.stream, "MIDI Clock"); |
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381 | |
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382 | streams_set_flag(g_midi_clock.stream, ROAR_FLAG_PRIMARY); |
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383 | streams_set_flag(g_midi_clock.stream, ROAR_FLAG_SYNC); |
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384 | |
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385 | midi_clock_set_bph(3600); // one tick per sec |
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386 | |
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387 | return 0; |
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388 | } |
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389 | |
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390 | int midi_clock_set_bph (uint_least32_t bph) { |
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391 | uint_least32_t sph = g_sa->rate/2 * 75 * g_sa->channels; // samples per houre |
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392 | |
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393 | g_midi_clock.bph = bph; |
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394 | |
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395 | g_midi_clock.spt = sph/bph; |
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396 | |
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397 | g_midi_clock.nt = ROAR_MATH_OVERFLOW_ADD(g_pos, g_midi_clock.spt); |
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398 | |
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399 | return 0; |
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400 | } |
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401 | |
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402 | int midi_clock_tick (void) { |
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403 | unsigned int diff; |
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404 | |
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405 | while ( g_pos >= g_midi_clock.nt ) { |
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406 | diff = g_pos - g_midi_clock.nt; |
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407 | ROAR_DBG("midi_clock_tick(void): g_pos is %u samples (%5.2f%%) ahead of nt.", diff, (float)diff/g_midi_clock.spt); |
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408 | |
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409 | g_midi_clock.nt = ROAR_MATH_OVERFLOW_ADD(g_midi_clock.nt, g_midi_clock.spt); |
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410 | |
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411 | if ( streams_get_flag(g_midi_clock.stream, ROAR_FLAG_SYNC) ) { |
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412 | ROAR_DBG("midi_clock_tick(void): TICK! (nt=%lu)", g_midi_clock.nt); |
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413 | } else { |
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414 | ROAR_DBG("midi_clock_tick(void): silent tick. (nt=%lu)", g_midi_clock.nt); |
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415 | } |
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416 | } |
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417 | |
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418 | return 0; |
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419 | } |
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420 | |
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421 | // CB: |
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422 | |
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423 | int midi_cb_init (void) { |
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424 | #ifdef _HAVE_CONSOLE |
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425 | struct roar_stream * s; |
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426 | struct roar_stream_server * ss; |
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427 | int i; |
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428 | char * files[] = { |
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429 | "/dev/console", |
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430 | #ifdef __linux__ |
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431 | "/dev/tty0", |
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432 | "/dev/vc/0", |
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433 | #endif |
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434 | NULL |
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435 | }; |
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436 | |
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437 | g_midi_cb.console = -1; |
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438 | g_midi_cb.stream = -1; |
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439 | g_midi_cb.stoptime = 0; |
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440 | g_midi_cb.playing = 0; |
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441 | |
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442 | for (i = 0; files[i] != NULL; i++) { |
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443 | if ( (g_midi_cb.console = open(files[i], O_WRONLY|O_NOCTTY, 0)) != -1 ) |
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444 | break; |
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445 | } |
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446 | |
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447 | if ( g_midi_cb.console == -1 ) |
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448 | return -1; |
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449 | |
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450 | if ( (g_midi_cb.stream = streams_new()) == -1 ) { |
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451 | ROAR_WARN("Error while initializing MIDI subsystem component CB"); |
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452 | midi_cb_free(); |
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453 | return -1; |
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454 | } |
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455 | |
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456 | midi_vio_set_dummy(g_midi_cb.stream); |
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457 | |
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458 | streams_get(g_midi_cb.stream, &ss); |
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459 | s = ROAR_STREAM(ss); |
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460 | |
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461 | memcpy(&(s->info), g_sa, sizeof(struct roar_audio_info)); |
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462 | |
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463 | s->pos_rel_id = -1; |
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464 | |
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465 | s->info.codec = 0; |
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466 | ss->codec_orgi = 0; |
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467 | |
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468 | s->info.channels = 1; |
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469 | s->info.rate = 1193180; |
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470 | s->info.bits = 8; |
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471 | |
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472 | if ( streams_set_dir(g_midi_cb.stream, ROAR_DIR_BRIDGE, 1) == -1 ) { |
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473 | ROAR_WARN("Error while initializing MIDI subsystem component CB"); |
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474 | midi_cb_free(); |
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475 | return -1; |
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476 | } |
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477 | |
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478 | streams_set_name(g_midi_cb.stream, "Console speaker bridge"); |
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479 | |
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480 | streams_set_flag(g_midi_cb.stream, ROAR_FLAG_OUTPUT); |
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481 | streams_set_flag(g_midi_cb.stream, ROAR_FLAG_PRIMARY); |
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482 | streams_set_flag(g_midi_cb.stream, ROAR_FLAG_HWMIXER); |
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483 | |
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484 | return 0; |
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485 | #else |
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486 | g_midi_cb.console = -1; |
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487 | g_midi_cb.stream = -1; |
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488 | |
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489 | return -1; |
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490 | #endif |
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491 | } |
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492 | |
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493 | int midi_cb_free (void) { |
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494 | #ifdef _HAVE_CONSOLE |
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495 | |
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496 | midi_cb_stop(); |
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497 | |
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498 | if ( g_midi_cb.stream != -1 ) |
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499 | streams_delete(g_midi_cb.stream); |
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500 | |
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501 | if ( g_midi_cb.console != -1 ) |
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502 | close(g_midi_cb.console); |
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503 | |
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504 | return 0; |
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505 | #else |
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506 | return -1; |
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507 | #endif |
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508 | } |
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509 | |
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510 | int midi_cb_play(float t, float freq, int override) { |
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511 | float samples_per_sec /* S/s */ = g_sa->rate * g_sa->channels; |
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512 | |
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513 | /* |
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514 | #define MIDI_CB_NOOVERRIDE 0 |
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515 | #define MIDI_CB_OVERRIDE 1 |
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516 | */ |
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517 | if ( g_midi_cb.playing && override != MIDI_CB_OVERRIDE ) |
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518 | return -1; |
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519 | |
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520 | g_midi_cb.stoptime = ROAR_MATH_OVERFLOW_ADD(g_pos, samples_per_sec*t); |
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521 | midi_cb_start(freq); |
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522 | g_midi_cb.playing = 1; |
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523 | |
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524 | return 0; |
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525 | } |
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526 | |
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527 | int midi_cb_update (void) { |
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528 | if ( !g_midi_cb.playing ) |
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529 | return 0; |
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530 | |
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531 | if ( g_midi_cb.stoptime <= g_pos ) |
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532 | midi_cb_stop(); |
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533 | |
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534 | return 0; |
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535 | } |
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536 | |
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537 | int midi_cb_start(float freq) { |
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538 | // On linux this uses ioctl KIOCSOUND |
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539 | #ifdef __linux__ |
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540 | if ( g_midi_cb.console == -1 ) |
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541 | return -1; |
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542 | |
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543 | if ( ioctl(g_midi_cb.console, KIOCSOUND, freq == 0 ? 0 : (int)(1193180.0/freq)) == -1 ) |
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544 | return -1; |
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545 | |
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546 | return 0; |
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547 | #else |
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548 | return -1; |
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549 | #endif |
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550 | } |
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551 | |
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552 | int midi_cb_stop (void) { |
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553 | #ifdef __linux__ |
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554 | g_midi_cb.playing = 0; |
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555 | return midi_cb_start(0); |
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556 | #else |
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557 | return -1; |
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558 | #endif |
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559 | } |
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560 | |
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561 | // VIO: |
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562 | |
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563 | int midi_vio_set_dummy(int stream) { |
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564 | struct roar_stream_server * ss; |
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565 | |
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566 | if ( streams_get(stream, &ss) == -1 ) |
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567 | return -1; |
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568 | |
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569 | ss->vio.read = NULL; |
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570 | ss->vio.write = NULL; |
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571 | ss->vio.lseek = NULL; |
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572 | ss->vio.nonblock = (int (*)(struct roar_vio_calls * vio, int state))midi_vio_ok; |
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573 | ss->vio.sync = (int (*)(struct roar_vio_calls * vio))midi_vio_ok; |
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574 | ss->vio.ctl = NULL; |
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575 | ss->vio.close = (int (*)(struct roar_vio_calls * vio))midi_vio_ok; |
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576 | |
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577 | return 0; |
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578 | } |
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579 | |
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580 | int midi_vio_ok(struct roar_vio_calls * vio, ...) { |
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581 | return 0; |
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582 | } |
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583 | |
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584 | //ll |
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