1 | /* |
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2 | * |
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3 | * This library is free software; you can redistribute it and/or |
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4 | * modify it under the terms of the GNU Library General Public License |
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5 | * as published by the Free Software Foundation; either version 2 of |
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6 | * the License, or (at your option) any later version. |
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7 | * |
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8 | * This library is distributed in the hope that it will be useful, but |
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9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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11 | * Library General Public License for more details. |
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12 | * |
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13 | * You should have received a copy of the GNU Library General Public |
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14 | * License along with this library; if not, write to the Free |
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15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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16 | * 02111-1307, USA |
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17 | */ |
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18 | |
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19 | /* this file originally taken from FluidSynth - A Software Synthesizer |
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20 | * Copyright (C) 2003 Peter Hanappe and others. |
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21 | * |
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22 | * \note fixed some track names causing segfault |
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23 | */ |
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24 | |
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25 | #include "aubio_priv.h" |
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26 | #include "midi.h" |
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27 | #include "midi_event.h" |
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28 | #include "midi_track.h" |
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29 | #include "midi_player.h" |
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30 | #include "midi_file.h" |
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31 | |
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32 | |
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33 | /** aubio_midi_file */ |
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34 | struct _aubio_midi_file_t{ |
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35 | //aubio_file_t fp; |
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36 | FILE *fp; |
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37 | int running_status; |
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38 | int c; |
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39 | int type; |
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40 | int ntracks; |
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41 | int uses_smpte; |
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42 | unsigned int smpte_fps; |
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43 | unsigned int smpte_res; |
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44 | unsigned int division; /* If uses_SMPTE == 0 then division is |
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45 | ticks per beat (quarter-note) */ |
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46 | double tempo; /* Beats per second (SI rules =) */ |
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47 | int tracklen; |
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48 | int trackpos; |
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49 | int eot; |
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50 | int varlen; |
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51 | }; |
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52 | |
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53 | /*************************************************************** |
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54 | * |
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55 | * MIDIFILE |
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56 | */ |
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57 | |
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58 | /** new_aubio_midi_file */ |
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59 | aubio_midi_file_t * new_aubio_midi_file(char* filename) |
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60 | { |
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61 | aubio_midi_file_t* mf; |
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62 | |
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63 | mf = AUBIO_NEW(aubio_midi_file_t); |
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64 | if (mf == NULL) { |
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65 | AUBIO_ERR( "Out of memory"); |
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66 | return NULL; |
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67 | } |
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68 | AUBIO_MEMSET(mf, 0, sizeof(aubio_midi_file_t)); |
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69 | |
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70 | mf->c = -1; |
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71 | mf->running_status = -1; |
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72 | mf->fp = AUBIO_FOPEN(filename, "rb"); |
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73 | |
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74 | if (mf->fp == NULL) { |
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75 | AUBIO_ERR( "Couldn't open the MIDI file !\n"); |
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76 | AUBIO_FREE(mf); |
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77 | return NULL; |
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78 | } |
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79 | |
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80 | if (aubio_midi_file_read_mthd(mf) != AUBIO_OK) { |
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81 | AUBIO_FREE(mf); |
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82 | return NULL; |
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83 | } |
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84 | return mf; |
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85 | } |
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86 | |
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87 | /** del_aubio_midi_file */ |
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88 | void del_aubio_midi_file(aubio_midi_file_t* mf) |
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89 | { |
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90 | if (mf == NULL) { |
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91 | return; |
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92 | } |
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93 | if (mf->fp != NULL) { |
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94 | AUBIO_FCLOSE(mf->fp); |
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95 | } |
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96 | AUBIO_FREE(mf); |
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97 | return; |
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98 | } |
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99 | |
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100 | /** aubio_midi_file_getc */ |
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101 | int aubio_midi_file_getc(aubio_midi_file_t* mf) |
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102 | { |
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103 | unsigned char c; |
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104 | int n; |
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105 | if (mf->c >= 0) { |
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106 | c = mf->c; |
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107 | mf->c = -1; |
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108 | } else { |
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109 | n = AUBIO_FREAD(&c, 1, 1, mf->fp); |
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110 | mf->trackpos++; |
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111 | } |
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112 | return (int) c; |
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113 | } |
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114 | |
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115 | /** aubio_midi_file_push */ |
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116 | int aubio_midi_file_push(aubio_midi_file_t* mf, int c) |
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117 | { |
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118 | mf->c = c; |
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119 | return AUBIO_OK; |
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120 | } |
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121 | |
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122 | /** aubio_midi_file_read */ |
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123 | int aubio_midi_file_read(aubio_midi_file_t* mf, void* buf, int len) |
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124 | { |
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125 | int num = AUBIO_FREAD(buf, 1, len, mf->fp); |
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126 | mf->trackpos += num; |
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127 | #if DEBUG |
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128 | if (num != len) { |
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129 | AUBIO_DBG( "Coulnd't read the requested number of bytes"); |
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130 | } |
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131 | #endif |
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132 | return (num != len)? AUBIO_FAIL : AUBIO_OK; |
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133 | } |
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134 | |
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135 | /** aubio_midi_file_skip */ |
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136 | int aubio_midi_file_skip(aubio_midi_file_t* mf, int skip) |
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137 | { |
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138 | int err = AUBIO_FSEEK(mf->fp, skip, SEEK_CUR); |
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139 | if (err) { |
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140 | AUBIO_ERR( "FAIL to seek position in file"); |
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141 | return AUBIO_FAIL; |
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142 | } |
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143 | return AUBIO_OK; |
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144 | } |
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145 | |
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146 | /** aubio_midi_file_read_mthd */ |
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147 | int aubio_midi_file_read_mthd(aubio_midi_file_t* mf) |
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148 | { |
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149 | signed char mthd[15]; |
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150 | if (aubio_midi_file_read(mf, mthd, 14) != AUBIO_OK) { |
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151 | return AUBIO_FAIL; |
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152 | } |
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153 | if ((AUBIO_STRNCMP((const char*)mthd, "MThd", 4) != 0) || (mthd[7] != 6) || (mthd[9] > 2)) { |
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154 | AUBIO_ERR( "Doesn't look like a MIDI file: invalid MThd header"); |
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155 | return AUBIO_FAIL; |
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156 | } |
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157 | mf->type = mthd[9]; |
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158 | mf->ntracks = (unsigned) mthd[11]; |
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159 | mf->ntracks += (unsigned int) (mthd[10]) << 16; |
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160 | /** \bug: smpte timing not yet implemented */ |
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161 | if((int)(mthd[12]) < 0){ |
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162 | /*if((mthd[12]) < 0){*/ |
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163 | mf->uses_smpte = 1; |
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164 | mf->smpte_fps = -mthd[12]; |
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165 | mf->smpte_res = (unsigned) mthd[13]; |
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166 | AUBIO_ERR( "File uses SMPTE timing -- Not implemented yet"); |
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167 | return AUBIO_FAIL; |
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168 | } else { |
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169 | mf->uses_smpte = 0; |
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170 | mf->division = (mthd[12] << 8) | (mthd[13] & 0xff); |
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171 | } |
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172 | return AUBIO_OK; |
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173 | } |
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174 | |
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175 | /** aubio_midi_file_load_tracks */ |
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176 | int aubio_midi_file_load_tracks(aubio_midi_file_t* mf, aubio_midi_player_t* player) |
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177 | { |
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178 | int i; |
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179 | for (i = 0; i < mf->ntracks; i++) { |
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180 | if (aubio_midi_file_read_track(mf, player, i) != AUBIO_OK) { |
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181 | return AUBIO_FAIL; |
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182 | } |
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183 | } |
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184 | return AUBIO_OK; |
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185 | } |
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186 | |
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187 | /** aubio_midi_file_read_tracklen */ |
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188 | int aubio_midi_file_read_tracklen(aubio_midi_file_t* mf) |
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189 | { |
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190 | unsigned char length[5]; |
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191 | if (aubio_midi_file_read(mf, length, 4) != AUBIO_OK) { |
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192 | return AUBIO_FAIL; |
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193 | } |
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194 | mf->tracklen = aubio_getlength(length); |
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195 | mf->trackpos = 0; |
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196 | mf->eot = 0; |
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197 | return AUBIO_OK; |
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198 | } |
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199 | |
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200 | /** aubio_midi_file_eot */ |
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201 | int aubio_midi_file_eot(aubio_midi_file_t* mf) |
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202 | { |
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203 | #if DEBUG |
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204 | if (mf->trackpos > mf->tracklen) { |
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205 | printf("track overrun: %d > %d\n", mf->trackpos, mf->tracklen); |
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206 | } |
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207 | #endif |
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208 | return mf->eot || (mf->trackpos >= mf->tracklen); |
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209 | } |
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210 | |
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211 | /** aubio_midi_file_read_track */ |
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212 | int aubio_midi_file_read_track(aubio_midi_file_t* mf, aubio_midi_player_t* player, int num) |
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213 | { |
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214 | aubio_track_t* track; |
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215 | unsigned char id[5], length[5]; |
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216 | int found_track = 0; |
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217 | int skip; |
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218 | |
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219 | AUBIO_DBG("Loading track %d\n",num); |
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220 | if (aubio_midi_file_read(mf, id, 4) != AUBIO_OK) { |
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221 | AUBIO_DBG("Failed loading track %d\n",num); |
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222 | return AUBIO_FAIL; |
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223 | } |
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224 | |
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225 | id[4]='\0'; |
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226 | |
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227 | while (!found_track){ |
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228 | |
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229 | if (aubio_isasciistring((char*) id) == 0) { |
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230 | AUBIO_ERR( "An non-ascii track header found, currupt file"); |
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231 | return AUBIO_FAIL; |
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232 | |
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233 | } else if (strcmp((char*) id, "MTrk") == 0) { |
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234 | |
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235 | found_track = 1; |
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236 | |
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237 | if (aubio_midi_file_read_tracklen(mf) != AUBIO_OK) { |
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238 | return AUBIO_FAIL; |
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239 | } |
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240 | |
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241 | track = new_aubio_track(num); |
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242 | if (track == NULL) { |
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243 | AUBIO_ERR( "Out of memory"); |
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244 | return AUBIO_FAIL; |
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245 | } |
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246 | |
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247 | while (!aubio_midi_file_eot(mf)) { |
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248 | if (aubio_midi_file_read_event(mf, track) != AUBIO_OK) { |
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249 | return AUBIO_FAIL; |
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250 | } |
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251 | } |
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252 | |
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253 | aubio_midi_player_add_track(player, track); |
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254 | } else { |
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255 | found_track = 0; |
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256 | if (aubio_midi_file_read(mf, length, 4) != AUBIO_OK) { |
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257 | return AUBIO_FAIL; |
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258 | } |
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259 | skip = aubio_getlength(length); |
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260 | /* fseek(mf->fp, skip, SEEK_CUR); */ |
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261 | if (aubio_midi_file_skip(mf, skip) != AUBIO_OK) { |
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262 | return AUBIO_FAIL; |
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263 | } |
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264 | } |
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265 | } |
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266 | |
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267 | if (feof(mf->fp)) { |
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268 | AUBIO_ERR( "Unexpected end of file"); |
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269 | return AUBIO_FAIL; |
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270 | } |
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271 | AUBIO_DBG("Loaded track %d\n",num); |
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272 | return AUBIO_OK; |
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273 | } |
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274 | |
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275 | /** aubio_midi_file_read_varlen */ |
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276 | int aubio_midi_file_read_varlen(aubio_midi_file_t* mf) |
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277 | { |
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278 | int i; |
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279 | int c; |
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280 | mf->varlen = 0; |
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281 | for (i = 0;;i++) { |
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282 | if (i == 4) { |
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283 | AUBIO_ERR( "Invalid variable length number"); |
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284 | return AUBIO_FAIL; |
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285 | } |
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286 | c = aubio_midi_file_getc(mf); |
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287 | if (c < 0) { |
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288 | AUBIO_ERR( "Unexpected end of file"); |
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289 | return AUBIO_FAIL; |
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290 | } |
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291 | if (c & 0x80){ |
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292 | mf->varlen |= (int) (c & 0x7F); |
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293 | mf->varlen <<= 7; |
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294 | } else { |
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295 | mf->varlen += c; |
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296 | break; |
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297 | } |
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298 | } |
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299 | return AUBIO_OK; |
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300 | } |
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301 | |
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302 | /** aubio_midi_file_read_event */ |
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303 | int aubio_midi_file_read_event(aubio_midi_file_t* mf, aubio_track_t* track) |
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304 | { |
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305 | int dtime; |
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306 | int status; |
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307 | int type; |
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308 | int tempo; |
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309 | unsigned char* metadata = NULL; |
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310 | unsigned char* dyn_buf = NULL; |
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311 | unsigned char static_buf[256]; |
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312 | int nominator, denominator, clocks, notes, sf, mi; |
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313 | aubio_midi_event_t* evt; |
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314 | int channel = 0; |
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315 | int param1 = 0; |
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316 | int param2 = 0; |
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317 | |
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318 | |
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319 | /* read the delta-time of the event */ |
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320 | if (aubio_midi_file_read_varlen(mf) != AUBIO_OK) { |
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321 | return AUBIO_FAIL; |
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322 | } |
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323 | dtime = mf->varlen; |
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324 | |
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325 | /* read the status byte */ |
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326 | status = aubio_midi_file_getc(mf); |
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327 | if (status < 0) { |
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328 | AUBIO_ERR( "Unexpected end of file"); |
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329 | return AUBIO_FAIL; |
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330 | } |
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331 | |
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332 | /* not a valid status byte: use the running status instead */ |
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333 | if ((status & 0x80) == 0) { |
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334 | if ((mf->running_status & 0x80) == 0) { |
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335 | AUBIO_ERR( "Undefined status and invalid running status"); |
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336 | return AUBIO_FAIL; |
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337 | } |
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338 | aubio_midi_file_push(mf, status); |
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339 | status = mf->running_status; |
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340 | } |
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341 | |
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342 | /* check what message we have */ |
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343 | if (status & 0x80) { |
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344 | mf->running_status = status; |
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345 | |
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346 | if ((status == MIDI_SYSEX) || (status == MIDI_EOX)) { /* system exclusif */ |
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347 | /** \bug Sysex messages are not handled yet */ |
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348 | /* read the length of the message */ |
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349 | if (aubio_midi_file_read_varlen(mf) != AUBIO_OK) { |
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350 | return AUBIO_FAIL; |
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351 | } |
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352 | |
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353 | if (mf->varlen < 255) { |
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354 | metadata = &static_buf[0]; |
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355 | } else { |
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356 | AUBIO_DBG( "%s: %d: alloc metadata, len = %d", __FILE__, __LINE__, mf->varlen); |
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357 | dyn_buf = AUBIO_MALLOC(mf->varlen + 1); |
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358 | if (dyn_buf == NULL) { |
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359 | //AUBIO_LOG(AUBIO_PANIC, "Out of memory"); |
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360 | AUBIO_ERR("Out of memory"); |
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361 | return AUBIO_FAIL; |
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362 | } |
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363 | metadata = dyn_buf; |
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364 | } |
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365 | |
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366 | /* read the data of the message */ |
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367 | if (mf->varlen) { |
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368 | |
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369 | if (aubio_midi_file_read(mf, metadata, mf->varlen) != AUBIO_OK) { |
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370 | if (dyn_buf) { |
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371 | AUBIO_FREE(dyn_buf); |
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372 | } |
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373 | return AUBIO_FAIL; |
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374 | } |
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375 | |
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376 | if (dyn_buf) { |
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377 | AUBIO_DBG( "%s: %d: free metadata", __FILE__, __LINE__); |
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378 | AUBIO_FREE(dyn_buf); |
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379 | } |
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380 | } |
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381 | |
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382 | return AUBIO_OK; |
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383 | |
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384 | } else if (status == MIDI_META_EVENT) { /* meta events */ |
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385 | |
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386 | int result = AUBIO_OK; |
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387 | |
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388 | /* get the type of the meta message */ |
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389 | type = aubio_midi_file_getc(mf); |
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390 | if (type < 0) { |
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391 | AUBIO_ERR( "Unexpected end of file"); |
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392 | return AUBIO_FAIL; |
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393 | } |
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394 | |
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395 | /* get the length of the data part */ |
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396 | if (aubio_midi_file_read_varlen(mf) != AUBIO_OK) { |
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397 | return AUBIO_FAIL; |
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398 | } |
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399 | |
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400 | if (mf->varlen) { |
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401 | |
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402 | if (mf->varlen < 255) { |
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403 | metadata = &static_buf[0]; |
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404 | } else { |
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405 | AUBIO_DBG( "%s: %d: alloc metadata, len = %d", __FILE__, __LINE__, mf->varlen); |
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406 | dyn_buf = AUBIO_MALLOC(mf->varlen + 1); |
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407 | if (dyn_buf == NULL) { |
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408 | AUBIO_ERR("Out of memory"); |
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409 | return AUBIO_FAIL; |
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410 | } |
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411 | metadata = dyn_buf; |
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412 | } |
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413 | |
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414 | /* read the data */ |
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415 | if (aubio_midi_file_read(mf, metadata, mf->varlen) != AUBIO_OK) { |
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416 | if (dyn_buf) { |
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417 | AUBIO_FREE(dyn_buf); |
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418 | } |
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419 | return AUBIO_FAIL; |
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420 | } |
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421 | } |
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422 | |
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423 | /* handle meta data */ |
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424 | switch (type) { |
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425 | |
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426 | case MIDI_COPYRIGHT: |
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427 | metadata[mf->varlen] = 0; |
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428 | break; |
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429 | |
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430 | case MIDI_TRACK_NAME: |
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431 | if (metadata != NULL) /* avoids crashes on empty tracks */ |
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432 | metadata[mf->varlen] = 0; |
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433 | aubio_track_set_name(track, (char*) metadata); |
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434 | break; |
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435 | |
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436 | case MIDI_INST_NAME: |
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437 | metadata[mf->varlen] = 0; |
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438 | break; |
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439 | |
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440 | case MIDI_LYRIC: |
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441 | break; |
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442 | |
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443 | case MIDI_MARKER: |
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444 | break; |
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445 | |
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446 | case MIDI_CUE_POINT: |
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447 | break; /* don't care much for text events */ |
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448 | |
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449 | case MIDI_EOT: |
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450 | if (mf->varlen != 0) { |
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451 | AUBIO_ERR("Invalid length for EndOfTrack event"); |
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452 | result = AUBIO_FAIL; |
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453 | break; |
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454 | } |
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455 | mf->eot = 1; |
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456 | break; |
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457 | |
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458 | case MIDI_SET_TEMPO: |
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459 | if (mf->varlen != 3) { |
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460 | AUBIO_ERR("Invalid length for SetTempo meta event"); |
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461 | result = AUBIO_FAIL; |
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462 | break; |
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463 | } |
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464 | tempo = (metadata[0] << 16) + (metadata[1] << 8) + metadata[2]; |
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465 | evt = new_aubio_midi_event(); |
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466 | if (evt == NULL) { |
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467 | AUBIO_ERR( "Out of memory"); |
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468 | result = AUBIO_FAIL; |
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469 | break; |
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470 | } |
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471 | evt->dtime = dtime; |
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472 | evt->type = MIDI_SET_TEMPO; |
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473 | evt->channel = 0; |
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474 | evt->param1 = tempo; |
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475 | evt->param2 = 0; |
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476 | aubio_track_add_event(track, evt); |
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477 | break; |
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478 | |
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479 | case MIDI_SMPTE_OFFSET: |
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480 | if (mf->varlen != 5) { |
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481 | AUBIO_ERR("Invalid length for SMPTE Offset meta event"); |
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482 | result = AUBIO_FAIL; |
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483 | break; |
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484 | } |
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485 | break; /* we don't use smtp */ |
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486 | |
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487 | case MIDI_TIME_SIGNATURE: |
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488 | if (mf->varlen != 4) { |
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489 | AUBIO_ERR("Invalid length for TimeSignature meta event"); |
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490 | result = AUBIO_FAIL; |
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491 | break; |
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492 | } |
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493 | nominator = metadata[0]; |
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494 | denominator = pow(2.0, (double) metadata[1]); |
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495 | clocks = metadata[2]; |
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496 | notes = metadata[3]; |
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497 | |
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498 | AUBIO_DBG("signature=%d/%d, metronome=%d, 32nd-notes=%d\n", |
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499 | nominator, denominator, clocks, notes); |
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500 | |
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501 | break; |
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502 | |
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503 | case MIDI_KEY_SIGNATURE: |
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504 | if (mf->varlen != 2) { |
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505 | AUBIO_ERR( "Invalid length for KeySignature meta event"); |
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506 | result = AUBIO_FAIL; |
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507 | break; |
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508 | } |
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509 | sf = metadata[0]; |
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510 | mi = metadata[1]; |
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511 | break; |
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512 | |
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513 | case MIDI_SEQUENCER_EVENT: |
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514 | AUBIO_DBG("Sequencer event ignored\n"); |
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515 | break; |
---|
516 | |
---|
517 | default: |
---|
518 | break; |
---|
519 | } |
---|
520 | |
---|
521 | if (dyn_buf) { |
---|
522 | AUBIO_DBG( "%s: %d: free metadata", __FILE__, __LINE__); |
---|
523 | AUBIO_FREE(dyn_buf); |
---|
524 | } |
---|
525 | |
---|
526 | return result; |
---|
527 | |
---|
528 | } else { /* channel messages */ |
---|
529 | |
---|
530 | type = status & 0xf0; |
---|
531 | channel = status & 0x0f; |
---|
532 | |
---|
533 | /* all channel message have at least 1 byte of associated data */ |
---|
534 | if ((param1 = aubio_midi_file_getc(mf)) < 0) { |
---|
535 | AUBIO_ERR( "Unexpected end of file"); |
---|
536 | return AUBIO_FAIL; |
---|
537 | } |
---|
538 | |
---|
539 | switch (type) { |
---|
540 | |
---|
541 | case NOTE_ON: |
---|
542 | if ((param2 = aubio_midi_file_getc(mf)) < 0) { |
---|
543 | AUBIO_ERR( "Unexpected end of file"); |
---|
544 | return AUBIO_FAIL; |
---|
545 | } |
---|
546 | break; |
---|
547 | |
---|
548 | case NOTE_OFF: |
---|
549 | if ((param2 = aubio_midi_file_getc(mf)) < 0) { |
---|
550 | AUBIO_ERR( "Unexpected end of file"); |
---|
551 | return AUBIO_FAIL; |
---|
552 | } |
---|
553 | break; |
---|
554 | |
---|
555 | case KEY_PRESSURE: |
---|
556 | if ((param2 = aubio_midi_file_getc(mf)) < 0) { |
---|
557 | AUBIO_ERR( "Unexpected end of file"); |
---|
558 | return AUBIO_FAIL; |
---|
559 | } |
---|
560 | break; |
---|
561 | |
---|
562 | case CONTROL_CHANGE: |
---|
563 | if ((param2 = aubio_midi_file_getc(mf)) < 0) { |
---|
564 | AUBIO_ERR( "Unexpected end of file"); |
---|
565 | return AUBIO_FAIL; |
---|
566 | } |
---|
567 | break; |
---|
568 | |
---|
569 | case PROGRAM_CHANGE: |
---|
570 | break; |
---|
571 | |
---|
572 | case CHANNEL_PRESSURE: |
---|
573 | break; |
---|
574 | |
---|
575 | case PITCH_BEND: |
---|
576 | if ((param2 = aubio_midi_file_getc(mf)) < 0) { |
---|
577 | AUBIO_ERR( "Unexpected end of file"); |
---|
578 | return AUBIO_FAIL; |
---|
579 | } |
---|
580 | |
---|
581 | param1 = ((param2 & 0x7f) << 7) | (param1 & 0x7f); |
---|
582 | param2 = 0; |
---|
583 | break; |
---|
584 | |
---|
585 | default: |
---|
586 | /* Can't possibly happen !? */ |
---|
587 | AUBIO_ERR( "Unrecognized MIDI event"); |
---|
588 | return AUBIO_FAIL; |
---|
589 | } |
---|
590 | evt = new_aubio_midi_event(); |
---|
591 | if (evt == NULL) { |
---|
592 | AUBIO_ERR( "Out of memory"); |
---|
593 | return AUBIO_FAIL; |
---|
594 | } |
---|
595 | evt->dtime = dtime; |
---|
596 | evt->type = type; |
---|
597 | evt->channel = channel; |
---|
598 | evt->param1 = param1; |
---|
599 | evt->param2 = param2; |
---|
600 | aubio_track_add_event(track, evt); |
---|
601 | } |
---|
602 | } |
---|
603 | return AUBIO_OK; |
---|
604 | } |
---|
605 | |
---|
606 | /** aubio_midi_file_get_division */ |
---|
607 | int aubio_midi_file_get_division(aubio_midi_file_t* midifile) |
---|
608 | { |
---|
609 | return midifile->division; |
---|
610 | } |
---|
611 | |
---|
612 | |
---|
613 | /** aubio_isasciistring */ |
---|
614 | int aubio_isasciistring(char* s) |
---|
615 | { |
---|
616 | int i; |
---|
617 | int len = (int) AUBIO_STRLEN(s); |
---|
618 | for (i = 0; i < len; i++) { |
---|
619 | if (!aubio_isascii(s[i])) { |
---|
620 | return 0; |
---|
621 | } |
---|
622 | } |
---|
623 | return 1; |
---|
624 | } |
---|
625 | |
---|
626 | /** aubio_getlength */ |
---|
627 | long aubio_getlength(unsigned char *s) |
---|
628 | { |
---|
629 | long i = 0; |
---|
630 | i = s[3] | (s[2]<<8) | (s[1]<<16) | (s[0]<<24); |
---|
631 | return i; |
---|
632 | } |
---|
633 | |
---|