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Public Member Functions
getid3_midi Class Reference

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g // More...

+ Collaboration diagram for getid3_midi:

Public Member Functions

 getid3_midi (&$fd, &$ThisFileInfo, $scanwholefile=true)
 GeneralMIDIinstrumentLookup ($instrumentid)
 GeneralMIDIpercussionLookup ($instrumentid)

Detailed Description

getID3() by James Heinrich info@.nosp@m.geti.nosp@m.d3.or.nosp@m.g //

Definition at line 17 of file module.audio.midi.php.

Member Function Documentation

getid3_midi::GeneralMIDIinstrumentLookup (   $instrumentid)

This is not a comment! 

0   Acoustic Grand
1   Bright Acoustic
2   Electric Grand
3   Honky-Tonk
4   Electric Piano 1
5   Electric Piano 2
6   Harpsichord
7   Clavier
8   Celesta
9   Glockenspiel
10  Music Box
11  Vibraphone
12  Marimba
13  Xylophone
14  Tubular Bells
15  Dulcimer
16  Drawbar Organ
17  Percussive Organ
18  Rock Organ
19  Church Organ
20  Reed Organ
21  Accordian
22  Harmonica
23  Tango Accordian
24  Acoustic Guitar (nylon)
25  Acoustic Guitar (steel)
26  Electric Guitar (jazz)
27  Electric Guitar (clean)
28  Electric Guitar (muted)
29  Overdriven Guitar
30  Distortion Guitar
31  Guitar Harmonics
32  Acoustic Bass
33  Electric Bass (finger)
34  Electric Bass (pick)
35  Fretless Bass
36  Slap Bass 1
37  Slap Bass 2
38  Synth Bass 1
39  Synth Bass 2
40  Violin
41  Viola
42  Cello
43  Contrabass
44  Tremolo Strings
45  Pizzicato Strings
46  Orchestral Strings
47  Timpani
48  String Ensemble 1
49  String Ensemble 2
50  SynthStrings 1
51  SynthStrings 2
52  Choir Aahs
53  Voice Oohs
54  Synth Voice
55  Orchestra Hit
56  Trumpet
57  Trombone
58  Tuba
59  Muted Trumpet
60  French Horn
61  Brass Section
62  SynthBrass 1
63  SynthBrass 2
64  Soprano Sax
65  Alto Sax
66  Tenor Sax
67  Baritone Sax
68  Oboe
69  English Horn
70  Bassoon
71  Clarinet
72  Piccolo
73  Flute
74  Recorder
75  Pan Flute
76  Blown Bottle
77  Shakuhachi
78  Whistle
79  Ocarina
80  Lead 1 (square)
81  Lead 2 (sawtooth)
82  Lead 3 (calliope)
83  Lead 4 (chiff)
84  Lead 5 (charang)
85  Lead 6 (voice)
86  Lead 7 (fifths)
87  Lead 8 (bass + lead)
88  Pad 1 (new age)
89  Pad 2 (warm)
90  Pad 3 (polysynth)
91  Pad 4 (choir)
92  Pad 5 (bowed)
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

Definition at line 319 of file module.audio.midi.php.

References getid3_lib\EmbeddedLookup().

Referenced by getid3_midi().

{
$begin = __LINE__;
return getid3_lib::EmbeddedLookup($instrumentid, $begin, __LINE__, __FILE__, 'GeneralMIDIinstrument');
}

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getid3_midi::GeneralMIDIpercussionLookup (   $instrumentid)

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

Definition at line 459 of file module.audio.midi.php.

References getid3_lib\EmbeddedLookup().

Referenced by getid3_midi().

{
$begin = __LINE__;
return getid3_lib::EmbeddedLookup($instrumentid, $begin, __LINE__, __FILE__, 'GeneralMIDIpercussion');
}

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getid3_midi::getid3_midi ( &  $fd,
&  $ThisFileInfo,
  $scanwholefile = true 
)

Definition at line 20 of file module.audio.midi.php.

References getid3_lib\BigEndian2Int(), elseif(), GeneralMIDIinstrumentLookup(), GeneralMIDIpercussionLookup(), and GETID3_FREAD_BUFFER_SIZE.

{
// shortcut
$ThisFileInfo['midi']['raw'] = array();
$thisfile_midi = &$ThisFileInfo['midi'];
$thisfile_midi_raw = &$thisfile_midi['raw'];
$ThisFileInfo['fileformat'] = 'midi';
$ThisFileInfo['audio']['dataformat'] = 'midi';
fseek($fd, $ThisFileInfo['avdataoffset'], SEEK_SET);
$MIDIdata = fread($fd, GETID3_FREAD_BUFFER_SIZE);
$offset = 0;
$MIDIheaderID = substr($MIDIdata, $offset, 4); // 'MThd'
if ($MIDIheaderID != 'MThd') {
$ThisFileInfo['error'][] = 'Expecting "MThd" at offset '.$ThisFileInfo['avdataoffset'].', found "'.$MIDIheaderID.'"';
unset($ThisFileInfo['fileformat']);
return false;
}
$offset += 4;
$thisfile_midi_raw['headersize'] = getid3_lib::BigEndian2Int(substr($MIDIdata, $offset, 4));
$offset += 4;
$thisfile_midi_raw['fileformat'] = getid3_lib::BigEndian2Int(substr($MIDIdata, $offset, 2));
$offset += 2;
$thisfile_midi_raw['tracks'] = getid3_lib::BigEndian2Int(substr($MIDIdata, $offset, 2));
$offset += 2;
$thisfile_midi_raw['ticksperqnote'] = getid3_lib::BigEndian2Int(substr($MIDIdata, $offset, 2));
$offset += 2;
for ($i = 0; $i < $thisfile_midi_raw['tracks']; $i++) {
if ((strlen($MIDIdata) - $offset) < 8) {
$MIDIdata .= fread($fd, GETID3_FREAD_BUFFER_SIZE);
}
$trackID = substr($MIDIdata, $offset, 4);
$offset += 4;
if ($trackID == 'MTrk') {
$tracksize = getid3_lib::BigEndian2Int(substr($MIDIdata, $offset, 4));
$offset += 4;
// $thisfile_midi['tracks'][$i]['size'] = $tracksize;
$trackdataarray[$i] = substr($MIDIdata, $offset, $tracksize);
$offset += $tracksize;
} else {
$ThisFileInfo['error'][] = 'Expecting "MTrk" at '.$offset.', found '.$trackID.' instead';
return false;
}
}
if (!isset($trackdataarray) || !is_array($trackdataarray)) {
$ThisFileInfo['error'][] = 'Cannot find MIDI track information';
unset($thisfile_midi);
unset($ThisFileInfo['fileformat']);
return false;
}
if ($scanwholefile) { // this can take quite a long time, so have the option to bypass it if speed is very important
$thisfile_midi['totalticks'] = 0;
$ThisFileInfo['playtime_seconds'] = 0;
$CurrentMicroSecondsPerBeat = 500000; // 120 beats per minute; 60,000,000 microseconds per minute -> 500,000 microseconds per beat
$CurrentBeatsPerMinute = 120; // 120 beats per minute; 60,000,000 microseconds per minute -> 500,000 microseconds per beat
foreach ($trackdataarray as $tracknumber => $trackdata) {
$eventsoffset = 0;
$LastIssuedMIDIcommand = 0;
$LastIssuedMIDIchannel = 0;
$CumulativeDeltaTime = 0;
$TicksAtCurrentBPM = 0;
while ($eventsoffset < strlen($trackdata)) {
$eventid = 0;
if (isset($MIDIevents[$tracknumber]) && is_array($MIDIevents[$tracknumber])) {
$eventid = count($MIDIevents[$tracknumber]);
}
$deltatime = 0;
for ($i = 0; $i < 4; $i++) {
$deltatimebyte = ord(substr($trackdata, $eventsoffset++, 1));
$deltatime = ($deltatime << 7) + ($deltatimebyte & 0x7F);
if ($deltatimebyte & 0x80) {
// another byte follows
} else {
break;
}
}
$CumulativeDeltaTime += $deltatime;
$TicksAtCurrentBPM += $deltatime;
$MIDIevents[$tracknumber][$eventid]['deltatime'] = $deltatime;
$MIDI_event_channel = ord(substr($trackdata, $eventsoffset++, 1));
if ($MIDI_event_channel & 0x80) {
// OK, normal event - MIDI command has MSB set
$LastIssuedMIDIcommand = $MIDI_event_channel >> 4;
$LastIssuedMIDIchannel = $MIDI_event_channel & 0x0F;
} else {
// running event - assume last command
$eventsoffset--;
}
$MIDIevents[$tracknumber][$eventid]['eventid'] = $LastIssuedMIDIcommand;
$MIDIevents[$tracknumber][$eventid]['channel'] = $LastIssuedMIDIchannel;
if ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x08) { // Note off (key is released)
$notenumber = ord(substr($trackdata, $eventsoffset++, 1));
$velocity = ord(substr($trackdata, $eventsoffset++, 1));
} elseif ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x09) { // Note on (key is pressed)
$notenumber = ord(substr($trackdata, $eventsoffset++, 1));
$velocity = ord(substr($trackdata, $eventsoffset++, 1));
} elseif ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x0A) { // Key after-touch
$notenumber = ord(substr($trackdata, $eventsoffset++, 1));
$velocity = ord(substr($trackdata, $eventsoffset++, 1));
} elseif ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x0B) { // Control Change
$controllernum = ord(substr($trackdata, $eventsoffset++, 1));
$newvalue = ord(substr($trackdata, $eventsoffset++, 1));
} elseif ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x0C) { // Program (patch) change
$newprogramnum = ord(substr($trackdata, $eventsoffset++, 1));
$thisfile_midi_raw['track'][$tracknumber]['instrumentid'] = $newprogramnum;
if ($tracknumber == 10) {
$thisfile_midi_raw['track'][$tracknumber]['instrument'] = $this->GeneralMIDIpercussionLookup($newprogramnum);
} else {
$thisfile_midi_raw['track'][$tracknumber]['instrument'] = $this->GeneralMIDIinstrumentLookup($newprogramnum);
}
} elseif ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x0D) { // Channel after-touch
$channelnumber = ord(substr($trackdata, $eventsoffset++, 1));
} elseif ($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x0E) { // Pitch wheel change (2000H is normal or no change)
$changeLSB = ord(substr($trackdata, $eventsoffset++, 1));
$changeMSB = ord(substr($trackdata, $eventsoffset++, 1));
$pitchwheelchange = (($changeMSB & 0x7F) << 7) & ($changeLSB & 0x7F);
} elseif (($MIDIevents[$tracknumber][$eventid]['eventid'] == 0x0F) && ($MIDIevents[$tracknumber][$eventid]['channel'] == 0x0F)) {
$METAeventCommand = ord(substr($trackdata, $eventsoffset++, 1));
$METAeventLength = ord(substr($trackdata, $eventsoffset++, 1));
$METAeventData = substr($trackdata, $eventsoffset, $METAeventLength);
$eventsoffset += $METAeventLength;
switch ($METAeventCommand) {
case 0x00: // Set track sequence number
$track_sequence_number = getid3_lib::BigEndian2Int(substr($METAeventData, 0, $METAeventLength));
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['seqno'] = $track_sequence_number;
break;
case 0x01: // Text: generic
$text_generic = substr($METAeventData, 0, $METAeventLength);
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['text'] = $text_generic;
$thisfile_midi['comments']['comment'][] = $text_generic;
break;
case 0x02: // Text: copyright
$text_copyright = substr($METAeventData, 0, $METAeventLength);
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['copyright'] = $text_copyright;
$thisfile_midi['comments']['copyright'][] = $text_copyright;
break;
case 0x03: // Text: track name
$text_trackname = substr($METAeventData, 0, $METAeventLength);
$thisfile_midi_raw['track'][$tracknumber]['name'] = $text_trackname;
break;
case 0x04: // Text: track instrument name
$text_instrument = substr($METAeventData, 0, $METAeventLength);
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['instrument'] = $text_instrument;
break;
case 0x05: // Text: lyrics
$text_lyrics = substr($METAeventData, 0, $METAeventLength);
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['lyrics'] = $text_lyrics;
if (!isset($thisfile_midi['lyrics'])) {
$thisfile_midi['lyrics'] = '';
}
$thisfile_midi['lyrics'] .= $text_lyrics."\n";
break;
case 0x06: // Text: marker
$text_marker = substr($METAeventData, 0, $METAeventLength);
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['marker'] = $text_marker;
break;
case 0x07: // Text: cue point
$text_cuepoint = substr($METAeventData, 0, $METAeventLength);
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['cuepoint'] = $text_cuepoint;
break;
case 0x2F: // End Of Track
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['EOT'] = $CumulativeDeltaTime;
break;
case 0x51: // Tempo: microseconds / quarter note
$CurrentMicroSecondsPerBeat = getid3_lib::BigEndian2Int(substr($METAeventData, 0, $METAeventLength));
if ($CurrentMicroSecondsPerBeat == 0) {
$ThisFileInfo['error'][] = 'Corrupt MIDI file: CurrentMicroSecondsPerBeat == zero';
return false;
}
$thisfile_midi_raw['events'][$tracknumber][$CumulativeDeltaTime]['us_qnote'] = $CurrentMicroSecondsPerBeat;
$CurrentBeatsPerMinute = (1000000 / $CurrentMicroSecondsPerBeat) * 60;
$MicroSecondsPerQuarterNoteAfter[$CumulativeDeltaTime] = $CurrentMicroSecondsPerBeat;
$TicksAtCurrentBPM = 0;
break;
case 0x58: // Time signature
$timesig_numerator = getid3_lib::BigEndian2Int($METAeventData{0});
$timesig_denominator = pow(2, getid3_lib::BigEndian2Int($METAeventData{1})); // $02 -> x/4, $03 -> x/8, etc
$timesig_32inqnote = getid3_lib::BigEndian2Int($METAeventData{2}); // number of 32nd notes to the quarter note
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['timesig_32inqnote'] = $timesig_32inqnote;
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['timesig_numerator'] = $timesig_numerator;
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['timesig_denominator'] = $timesig_denominator;
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['timesig_text'] = $timesig_numerator.'/'.$timesig_denominator;
$thisfile_midi['timesignature'][] = $timesig_numerator.'/'.$timesig_denominator;
break;
case 0x59: // Keysignature
$keysig_sharpsflats = getid3_lib::BigEndian2Int($METAeventData{0});
if ($keysig_sharpsflats & 0x80) {
// (-7 -> 7 flats, 0 ->key of C, 7 -> 7 sharps)
$keysig_sharpsflats -= 256;
}
$keysig_majorminor = getid3_lib::BigEndian2Int($METAeventData{1}); // 0 -> major, 1 -> minor
$keysigs = array(-7=>'Cb', -6=>'Gb', -5=>'Db', -4=>'Ab', -3=>'Eb', -2=>'Bb', -1=>'F', 0=>'C', 1=>'G', 2=>'D', 3=>'A', 4=>'E', 5=>'B', 6=>'F#', 7=>'C#');
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['keysig_sharps'] = (($keysig_sharpsflats > 0) ? abs($keysig_sharpsflats) : 0);
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['keysig_flats'] = (($keysig_sharpsflats < 0) ? abs($keysig_sharpsflats) : 0);
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['keysig_minor'] = (bool) $keysig_majorminor;
//$thisfile_midi_raw['events'][$tracknumber][$eventid]['keysig_text'] = $keysigs[$keysig_sharpsflats].' '.($thisfile_midi_raw['events'][$tracknumber][$eventid]['keysig_minor'] ? 'minor' : 'major');
// $keysigs[$keysig_sharpsflats] gets an int key (correct) - $keysigs["$keysig_sharpsflats"] gets a string key (incorrect)
$thisfile_midi['keysignature'][] = $keysigs[$keysig_sharpsflats].' '.((bool) $keysig_majorminor ? 'minor' : 'major');
break;
case 0x7F: // Sequencer specific information
$custom_data = substr($METAeventData, 0, $METAeventLength);
break;
default:
$ThisFileInfo['warning'][] = 'Unhandled META Event Command: '.$METAeventCommand;
break;
}
} else {
$ThisFileInfo['warning'][] = 'Unhandled MIDI Event ID: '.$MIDIevents[$tracknumber][$eventid]['eventid'].' + Channel ID: '.$MIDIevents[$tracknumber][$eventid]['channel'];
}
}
if (($tracknumber > 0) || (count($trackdataarray) == 1)) {
$thisfile_midi['totalticks'] = max($thisfile_midi['totalticks'], $CumulativeDeltaTime);
}
}
$previoustickoffset = null;
ksort($MicroSecondsPerQuarterNoteAfter);
foreach ($MicroSecondsPerQuarterNoteAfter as $tickoffset => $microsecondsperbeat) {
if (is_null($previoustickoffset)) {
$prevmicrosecondsperbeat = $microsecondsperbeat;
$previoustickoffset = $tickoffset;
continue;
}
if ($thisfile_midi['totalticks'] > $tickoffset) {
if ($thisfile_midi_raw['ticksperqnote'] == 0) {
$ThisFileInfo['error'][] = 'Corrupt MIDI file: ticksperqnote == zero';
return false;
}
$ThisFileInfo['playtime_seconds'] += (($tickoffset - $previoustickoffset) / $thisfile_midi_raw['ticksperqnote']) * ($prevmicrosecondsperbeat / 1000000);
$prevmicrosecondsperbeat = $microsecondsperbeat;
$previoustickoffset = $tickoffset;
}
}
if ($thisfile_midi['totalticks'] > $previoustickoffset) {
if ($thisfile_midi_raw['ticksperqnote'] == 0) {
$ThisFileInfo['error'][] = 'Corrupt MIDI file: ticksperqnote == zero';
return false;
}
$ThisFileInfo['playtime_seconds'] += (($thisfile_midi['totalticks'] - $previoustickoffset) / $thisfile_midi_raw['ticksperqnote']) * ($microsecondsperbeat / 1000000);
}
}
if ($ThisFileInfo['playtime_seconds'] > 0) {
$ThisFileInfo['bitrate'] = (($ThisFileInfo['avdataend'] - $ThisFileInfo['avdataoffset']) * 8) / $ThisFileInfo['playtime_seconds'];
}
if (!empty($thisfile_midi['lyrics'])) {
$thisfile_midi['comments']['lyrics'][] = $thisfile_midi['lyrics'];
}
return true;
}

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The documentation for this class was generated from the following file: