526 lines
18 KiB
PHP
526 lines
18 KiB
PHP
<?php
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/////////////////////////////////////////////////////////////////
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/// getID3() by James Heinrich <info@getid3.org> //
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// available at http://getid3.sourceforge.net //
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// or http://www.getid3.org //
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/////////////////////////////////////////////////////////////////
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// See readme.txt for more details //
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/////////////////////////////////////////////////////////////////
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// //
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// module.audio.midi.php //
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// module for Midi Audio files //
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// dependencies: NONE //
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// ///
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/////////////////////////////////////////////////////////////////
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define('GETID3_MIDI_MAGIC_MTHD', 'MThd'); // MIDI file header magic
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define('GETID3_MIDI_MAGIC_MTRK', 'MTrk'); // MIDI track header magic
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class getid3_midi extends getid3_handler
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{
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var $scanwholefile = true;
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function Analyze() {
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$info = &$this->getid3->info;
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// shortcut
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$info['midi']['raw'] = array();
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$thisfile_midi = &$info['midi'];
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$thisfile_midi_raw = &$thisfile_midi['raw'];
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$info['fileformat'] = 'midi';
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$info['audio']['dataformat'] = 'midi';
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fseek($this->getid3->fp, $info['avdataoffset'], SEEK_SET);
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$MIDIdata = fread($this->getid3->fp, $this->getid3->fread_buffer_size());
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$offset = 0;
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$MIDIheaderID = substr($MIDIdata, $offset, 4); // 'MThd'
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if ($MIDIheaderID != GETID3_MIDI_MAGIC_MTHD) {
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$info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes(GETID3_MIDI_MAGIC_MTHD).'" at offset '.$info['avdataoffset'].', found "'.getid3_lib::PrintHexBytes($MIDIheaderID).'"';
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unset($info['fileformat']);
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return false;
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}
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$offset += 4;
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$thisfile_midi_raw['headersize'] = getid3_lib::BigEndian2Int(substr($MIDIdata, $offset, 4));
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$offset += 4;
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$thisfile_midi_raw['fileformat'] = getid3_lib::BigEndian2Int(substr($MIDIdata, $offset, 2));
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$offset += 2;
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$thisfile_midi_raw['tracks'] = getid3_lib::BigEndian2Int(substr($MIDIdata, $offset, 2));
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$offset += 2;
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$thisfile_midi_raw['ticksperqnote'] = getid3_lib::BigEndian2Int(substr($MIDIdata, $offset, 2));
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$offset += 2;
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for ($i = 0; $i < $thisfile_midi_raw['tracks']; $i++) {
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while ((strlen($MIDIdata) - $offset) < 8) {
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$MIDIdata .= fread($this->getid3->fp, $this->getid3->fread_buffer_size());
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}
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$trackID = substr($MIDIdata, $offset, 4);
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$offset += 4;
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if ($trackID == GETID3_MIDI_MAGIC_MTRK) {
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$tracksize = getid3_lib::BigEndian2Int(substr($MIDIdata, $offset, 4));
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$offset += 4;
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// $thisfile_midi['tracks'][$i]['size'] = $tracksize;
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$trackdataarray[$i] = substr($MIDIdata, $offset, $tracksize);
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$offset += $tracksize;
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} else {
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$info['error'][] = 'Expecting "'.getid3_lib::PrintHexBytes(GETID3_MIDI_MAGIC_MTRK).'" at '.($offset - 4).', found "'.getid3_lib::PrintHexBytes($trackID).'" instead';
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return false;
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}
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}
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if (!isset($trackdataarray) || !is_array($trackdataarray)) {
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$info['error'][] = 'Cannot find MIDI track information';
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unset($thisfile_midi);
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unset($info['fileformat']);
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return false;
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}
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if ($this->scanwholefile) { // this can take quite a long time, so have the option to bypass it if speed is very important
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$thisfile_midi['totalticks'] = 0;
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$info['playtime_seconds'] = 0;
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$CurrentMicroSecondsPerBeat = 500000; // 120 beats per minute; 60,000,000 microseconds per minute -> 500,000 microseconds per beat
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$CurrentBeatsPerMinute = 120; // 120 beats per minute; 60,000,000 microseconds per minute -> 500,000 microseconds per beat
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$MicroSecondsPerQuarterNoteAfter = array ();
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foreach ($trackdataarray as $tracknumber => $trackdata) {
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$eventsoffset = 0;
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$LastIssuedMIDIcommand = 0;
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$LastIssuedMIDIchannel = 0;
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$CumulativeDeltaTime = 0;
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$TicksAtCurrentBPM = 0;
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while ($eventsoffset < strlen($trackdata)) {
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$eventid = 0;
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if (isset($MIDIevents[$tracknumber]) && is_array($MIDIevents[$tracknumber])) {
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$eventid = count($MIDIevents[$tracknumber]);
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}
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$deltatime = 0;
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for ($i = 0; $i < 4; $i++) {
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$deltatimebyte = ord(substr($trackdata, $eventsoffset++, 1));
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$deltatime = ($deltatime << 7) + ($deltatimebyte & 0x7F);
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if ($deltatimebyte & 0x80) {
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// another byte follows
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} else {
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break;
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}
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}
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$CumulativeDeltaTime += $deltatime;
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$TicksAtCurrentBPM += $deltatime;
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$MIDIevents[$tracknumber][$eventid]['deltatime'] = $deltatime;
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$MIDI_event_channel = ord(substr($trackdata, $eventsoffset++, 1));
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if ($MIDI_event_channel & 0x80) {
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// OK, normal event - MIDI command has MSB set
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$LastIssuedMIDIcommand = $MIDI_event_channel >> 4;
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$LastIssuedMIDIchannel = $MIDI_event_channel & 0x0F;
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} else {
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// running event - assume last command
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$eventsoffset--;
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}
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$MIDIevents[$tracknumber][$eventid]['eventid'] = $LastIssuedMIDIcommand;
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$MIDIevents[$tracknumber][$eventid]['channel'] = $LastIssuedMIDIchannel;
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if ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x08) { // Note off (key is released)
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$notenumber = ord(substr($trackdata, $eventsoffset++, 1));
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$velocity = ord(substr($trackdata, $eventsoffset++, 1));
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} elseif ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x09) { // Note on (key is pressed)
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$notenumber = ord(substr($trackdata, $eventsoffset++, 1));
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$velocity = ord(substr($trackdata, $eventsoffset++, 1));
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} elseif ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x0A) { // Key after-touch
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$notenumber = ord(substr($trackdata, $eventsoffset++, 1));
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$velocity = ord(substr($trackdata, $eventsoffset++, 1));
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} elseif ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x0B) { // Control Change
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$controllernum = ord(substr($trackdata, $eventsoffset++, 1));
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$newvalue = ord(substr($trackdata, $eventsoffset++, 1));
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} elseif ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x0C) { // Program (patch) change
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$newprogramnum = ord(substr($trackdata, $eventsoffset++, 1));
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$thisfile_midi_raw['track'][$tracknumber]['instrumentid'] = $newprogramnum;
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if ($tracknumber == 10) {
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$thisfile_midi_raw['track'][$tracknumber]['instrument'] = $this->GeneralMIDIpercussionLookup($newprogramnum);
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} else {
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$thisfile_midi_raw['track'][$tracknumber]['instrument'] = $this->GeneralMIDIinstrumentLookup($newprogramnum);
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}
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} elseif ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x0D) { // Channel after-touch
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$channelnumber = ord(substr($trackdata, $eventsoffset++, 1));
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} elseif ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x0E) { // Pitch wheel change (2000H is normal or no change)
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$changeLSB = ord(substr($trackdata, $eventsoffset++, 1));
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$changeMSB = ord(substr($trackdata, $eventsoffset++, 1));
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$pitchwheelchange = (($changeMSB & 0x7F) << 7) & ($changeLSB & 0x7F);
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} elseif (($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x0F) && ($MIDIevents[$tracknumber][$eventid]['channel'] == 0x0F)) {
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$METAeventCommand = ord(substr($trackdata, $eventsoffset++, 1));
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$METAeventLength = ord(substr($trackdata, $eventsoffset++, 1));
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$METAeventData = substr($trackdata, $eventsoffset, $METAeventLength);
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$eventsoffset += $METAeventLength;
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switch ($METAeventCommand) {
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case 0x00: // Set track sequence number
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$track_sequence_number = getid3_lib::BigEndian2Int(substr($METAeventData, 0, $METAeventLength));
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['seqno'] = $track_sequence_number;
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break;
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case 0x01: // Text: generic
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$text_generic = substr($METAeventData, 0, $METAeventLength);
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['text'] = $text_generic;
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$thisfile_midi['comments']['comment'][] = $text_generic;
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break;
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case 0x02: // Text: copyright
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$text_copyright = substr($METAeventData, 0, $METAeventLength);
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['copyright'] = $text_copyright;
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$thisfile_midi['comments']['copyright'][] = $text_copyright;
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break;
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case 0x03: // Text: track name
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$text_trackname = substr($METAeventData, 0, $METAeventLength);
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$thisfile_midi_raw['track'][$tracknumber]['name'] = $text_trackname;
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break;
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case 0x04: // Text: track instrument name
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$text_instrument = substr($METAeventData, 0, $METAeventLength);
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['instrument'] = $text_instrument;
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break;
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case 0x05: // Text: lyrics
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$text_lyrics = substr($METAeventData, 0, $METAeventLength);
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['lyrics'] = $text_lyrics;
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if (!isset($thisfile_midi['lyrics'])) {
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$thisfile_midi['lyrics'] = '';
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}
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$thisfile_midi['lyrics'] .= $text_lyrics."\n";
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break;
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case 0x06: // Text: marker
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$text_marker = substr($METAeventData, 0, $METAeventLength);
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['marker'] = $text_marker;
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break;
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case 0x07: // Text: cue point
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$text_cuepoint = substr($METAeventData, 0, $METAeventLength);
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['cuepoint'] = $text_cuepoint;
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break;
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case 0x2F: // End Of Track
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['EOT'] = $CumulativeDeltaTime;
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break;
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case 0x51: // Tempo: microseconds / quarter note
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$CurrentMicroSecondsPerBeat = getid3_lib::BigEndian2Int(substr($METAeventData, 0, $METAeventLength));
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if ($CurrentMicroSecondsPerBeat == 0) {
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$info['error'][] = 'Corrupt MIDI file: CurrentMicroSecondsPerBeat == zero';
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return false;
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}
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$thisfile_midi_raw['events'][$tracknumber][$CumulativeDeltaTime]['us_qnote'] = $CurrentMicroSecondsPerBeat;
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$CurrentBeatsPerMinute = (1000000 / $CurrentMicroSecondsPerBeat) * 60;
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$MicroSecondsPerQuarterNoteAfter[$CumulativeDeltaTime] = $CurrentMicroSecondsPerBeat;
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$TicksAtCurrentBPM = 0;
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break;
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case 0x58: // Time signature
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$timesig_numerator = getid3_lib::BigEndian2Int($METAeventData{0});
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$timesig_denominator = pow(2, getid3_lib::BigEndian2Int($METAeventData{1})); // $02 -> x/4, $03 -> x/8, etc
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$timesig_32inqnote = getid3_lib::BigEndian2Int($METAeventData{2}); // number of 32nd notes to the quarter note
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['timesig_32inqnote'] = $timesig_32inqnote;
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['timesig_numerator'] = $timesig_numerator;
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['timesig_denominator'] = $timesig_denominator;
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['timesig_text'] = $timesig_numerator.'/'.$timesig_denominator;
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$thisfile_midi['timesignature'][] = $timesig_numerator.'/'.$timesig_denominator;
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break;
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case 0x59: // Keysignature
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$keysig_sharpsflats = getid3_lib::BigEndian2Int($METAeventData{0});
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if ($keysig_sharpsflats & 0x80) {
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// (-7 -> 7 flats, 0 ->key of C, 7 -> 7 sharps)
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$keysig_sharpsflats -= 256;
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}
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$keysig_majorminor = getid3_lib::BigEndian2Int($METAeventData{1}); // 0 -> major, 1 -> minor
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$keysigs = array(-7=>'Cb', -6=>'Gb', -5=>'Db', -4=>'Ab', -3=>'Eb', -2=>'Bb', -1=>'F', 0=>'C', 1=>'G', 2=>'D', 3=>'A', 4=>'E', 5=>'B', 6=>'F#', 7=>'C#');
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['keysig_sharps'] = (($keysig_sharpsflats > 0) ? abs($keysig_sharpsflats) : 0);
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['keysig_flats'] = (($keysig_sharpsflats < 0) ? abs($keysig_sharpsflats) : 0);
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['keysig_minor'] = (bool) $keysig_majorminor;
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//$thisfile_midi_raw['events'][$tracknumber][$eventid]['keysig_text'] = $keysigs[$keysig_sharpsflats].' '.($thisfile_midi_raw['events'][$tracknumber][$eventid]['keysig_minor'] ? 'minor' : 'major');
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// $keysigs[$keysig_sharpsflats] gets an int key (correct) - $keysigs["$keysig_sharpsflats"] gets a string key (incorrect)
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$thisfile_midi['keysignature'][] = $keysigs[$keysig_sharpsflats].' '.((bool) $keysig_majorminor ? 'minor' : 'major');
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break;
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case 0x7F: // Sequencer specific information
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$custom_data = substr($METAeventData, 0, $METAeventLength);
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break;
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default:
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$info['warning'][] = 'Unhandled META Event Command: '.$METAeventCommand;
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break;
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}
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} else {
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$info['warning'][] = 'Unhandled MIDI Event ID: '.$MIDIevents[$tracknumber][$eventid]['eventid'].' + Channel ID: '.$MIDIevents[$tracknumber][$eventid]['channel'];
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}
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}
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if (($tracknumber > 0) || (count($trackdataarray) == 1)) {
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$thisfile_midi['totalticks'] = max($thisfile_midi['totalticks'], $CumulativeDeltaTime);
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}
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}
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$previoustickoffset = null;
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ksort($MicroSecondsPerQuarterNoteAfter);
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foreach ($MicroSecondsPerQuarterNoteAfter as $tickoffset => $microsecondsperbeat) {
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if (is_null($previoustickoffset)) {
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$prevmicrosecondsperbeat = $microsecondsperbeat;
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$previoustickoffset = $tickoffset;
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continue;
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}
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if ($thisfile_midi['totalticks'] > $tickoffset) {
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if ($thisfile_midi_raw['ticksperqnote'] == 0) {
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$info['error'][] = 'Corrupt MIDI file: ticksperqnote == zero';
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return false;
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}
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$info['playtime_seconds'] += (($tickoffset - $previoustickoffset) / $thisfile_midi_raw['ticksperqnote']) * ($prevmicrosecondsperbeat / 1000000);
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$prevmicrosecondsperbeat = $microsecondsperbeat;
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$previoustickoffset = $tickoffset;
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}
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}
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if ($thisfile_midi['totalticks'] > $previoustickoffset) {
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if ($thisfile_midi_raw['ticksperqnote'] == 0) {
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$info['error'][] = 'Corrupt MIDI file: ticksperqnote == zero';
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return false;
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}
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$info['playtime_seconds'] += (($thisfile_midi['totalticks'] - $previoustickoffset) / $thisfile_midi_raw['ticksperqnote']) * ($microsecondsperbeat / 1000000);
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}
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}
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if (!empty($info['playtime_seconds'])) {
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$info['bitrate'] = (($info['avdataend'] - $info['avdataoffset']) * 8) / $info['playtime_seconds'];
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}
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if (!empty($thisfile_midi['lyrics'])) {
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$thisfile_midi['comments']['lyrics'][] = $thisfile_midi['lyrics'];
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}
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return true;
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}
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function GeneralMIDIinstrumentLookup($instrumentid) {
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$begin = __LINE__;
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/** This is not a comment!
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0 Acoustic Grand
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1 Bright Acoustic
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2 Electric Grand
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3 Honky-Tonk
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4 Electric Piano 1
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5 Electric Piano 2
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6 Harpsichord
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7 Clavier
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8 Celesta
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9 Glockenspiel
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10 Music Box
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11 Vibraphone
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12 Marimba
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13 Xylophone
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14 Tubular Bells
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15 Dulcimer
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16 Drawbar Organ
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17 Percussive Organ
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18 Rock Organ
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19 Church Organ
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20 Reed Organ
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21 Accordian
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22 Harmonica
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23 Tango Accordian
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24 Acoustic Guitar (nylon)
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25 Acoustic Guitar (steel)
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26 Electric Guitar (jazz)
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27 Electric Guitar (clean)
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28 Electric Guitar (muted)
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29 Overdriven Guitar
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30 Distortion Guitar
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31 Guitar Harmonics
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32 Acoustic Bass
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33 Electric Bass (finger)
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34 Electric Bass (pick)
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35 Fretless Bass
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36 Slap Bass 1
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37 Slap Bass 2
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38 Synth Bass 1
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39 Synth Bass 2
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40 Violin
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41 Viola
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42 Cello
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43 Contrabass
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44 Tremolo Strings
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45 Pizzicato Strings
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46 Orchestral Strings
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47 Timpani
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48 String Ensemble 1
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49 String Ensemble 2
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50 SynthStrings 1
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51 SynthStrings 2
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52 Choir Aahs
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53 Voice Oohs
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54 Synth Voice
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55 Orchestra Hit
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56 Trumpet
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57 Trombone
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58 Tuba
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59 Muted Trumpet
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60 French Horn
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61 Brass Section
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62 SynthBrass 1
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63 SynthBrass 2
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64 Soprano Sax
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65 Alto Sax
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66 Tenor Sax
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67 Baritone Sax
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68 Oboe
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69 English Horn
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70 Bassoon
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71 Clarinet
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72 Piccolo
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73 Flute
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74 Recorder
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75 Pan Flute
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76 Blown Bottle
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77 Shakuhachi
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78 Whistle
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79 Ocarina
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80 Lead 1 (square)
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81 Lead 2 (sawtooth)
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82 Lead 3 (calliope)
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83 Lead 4 (chiff)
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84 Lead 5 (charang)
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85 Lead 6 (voice)
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86 Lead 7 (fifths)
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87 Lead 8 (bass + lead)
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88 Pad 1 (new age)
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89 Pad 2 (warm)
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90 Pad 3 (polysynth)
|
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91 Pad 4 (choir)
|
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92 Pad 5 (bowed)
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|
93 Pad 6 (metallic)
|
|
94 Pad 7 (halo)
|
|
95 Pad 8 (sweep)
|
|
96 FX 1 (rain)
|
|
97 FX 2 (soundtrack)
|
|
98 FX 3 (crystal)
|
|
99 FX 4 (atmosphere)
|
|
100 FX 5 (brightness)
|
|
101 FX 6 (goblins)
|
|
102 FX 7 (echoes)
|
|
103 FX 8 (sci-fi)
|
|
104 Sitar
|
|
105 Banjo
|
|
106 Shamisen
|
|
107 Koto
|
|
108 Kalimba
|
|
109 Bagpipe
|
|
110 Fiddle
|
|
111 Shanai
|
|
112 Tinkle Bell
|
|
113 Agogo
|
|
114 Steel Drums
|
|
115 Woodblock
|
|
116 Taiko Drum
|
|
117 Melodic Tom
|
|
118 Synth Drum
|
|
119 Reverse Cymbal
|
|
120 Guitar Fret Noise
|
|
121 Breath Noise
|
|
122 Seashore
|
|
123 Bird Tweet
|
|
124 Telephone Ring
|
|
125 Helicopter
|
|
126 Applause
|
|
127 Gunshot
|
|
|
|
*/
|
|
|
|
return getid3_lib::EmbeddedLookup($instrumentid, $begin, __LINE__, __FILE__, 'GeneralMIDIinstrument');
|
|
}
|
|
|
|
function GeneralMIDIpercussionLookup($instrumentid) {
|
|
|
|
$begin = __LINE__;
|
|
|
|
/** This is not a comment!
|
|
|
|
35 Acoustic Bass Drum
|
|
36 Bass Drum 1
|
|
37 Side Stick
|
|
38 Acoustic Snare
|
|
39 Hand Clap
|
|
40 Electric Snare
|
|
41 Low Floor Tom
|
|
42 Closed Hi-Hat
|
|
43 High Floor Tom
|
|
44 Pedal Hi-Hat
|
|
45 Low Tom
|
|
46 Open Hi-Hat
|
|
47 Low-Mid Tom
|
|
48 Hi-Mid Tom
|
|
49 Crash Cymbal 1
|
|
50 High Tom
|
|
51 Ride Cymbal 1
|
|
52 Chinese Cymbal
|
|
53 Ride Bell
|
|
54 Tambourine
|
|
55 Splash Cymbal
|
|
56 Cowbell
|
|
57 Crash Cymbal 2
|
|
59 Ride Cymbal 2
|
|
60 Hi Bongo
|
|
61 Low Bongo
|
|
62 Mute Hi Conga
|
|
63 Open Hi Conga
|
|
64 Low Conga
|
|
65 High Timbale
|
|
66 Low Timbale
|
|
67 High Agogo
|
|
68 Low Agogo
|
|
69 Cabasa
|
|
70 Maracas
|
|
71 Short Whistle
|
|
72 Long Whistle
|
|
73 Short Guiro
|
|
74 Long Guiro
|
|
75 Claves
|
|
76 Hi Wood Block
|
|
77 Low Wood Block
|
|
78 Mute Cuica
|
|
79 Open Cuica
|
|
80 Mute Triangle
|
|
81 Open Triangle
|
|
|
|
*/
|
|
|
|
return getid3_lib::EmbeddedLookup($instrumentid, $begin, __LINE__, __FILE__, 'GeneralMIDIpercussion');
|
|
}
|
|
|
|
}
|
|
|
|
|
|
?>
|