/
JZZ.midi.SMF.js
1582 lines (1545 loc) · 49.6 KB
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JZZ.midi.SMF.js
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(function(global, factory) {
/* istanbul ignore next */
if (typeof exports === 'object' && typeof module !== 'undefined') {
factory.SMF = factory;
module.exports = factory;
}
else if (typeof define === 'function' && define.amd) {
define('JZZ.midi.SMF', ['JZZ'], factory);
}
else {
factory(JZZ);
}
})(this, function(JZZ) {
/* istanbul ignore next */
if (JZZ.MIDI.SMF) return;
var _ver = '1.8.8';
var _now = JZZ.lib.now;
function _error(s) { throw new Error(s); }
function _num(n) {
var s = '';
if (n > 0x1fffff) s += String.fromCharCode(((n >> 21) & 0x7f) + 0x80);
if (n > 0x3fff) s += String.fromCharCode(((n >> 14) & 0x7f) + 0x80);
if (n > 0x7f) s += String.fromCharCode(((n >> 7) & 0x7f) + 0x80);
s += String.fromCharCode(n & 0x7f);
return s;
}
function _num2(n) {
return String.fromCharCode(n >> 8) + String.fromCharCode(n & 0xff);
}
function _num4(n) {
return String.fromCharCode((n >> 24) & 0xff) + String.fromCharCode((n >> 16) & 0xff) + String.fromCharCode((n >> 8) & 0xff) + String.fromCharCode(n & 0xff);
}
function _num4le(n) {
return String.fromCharCode(n & 0xff) + String.fromCharCode((n >> 8) & 0xff) + String.fromCharCode((n >> 16) & 0xff) + String.fromCharCode((n >> 24) & 0xff);
}
function _u8a2s(u) {
var s = '';
var len = u.byteLength;
// String.fromCharCode.apply(null, u) throws "RangeError: Maximum call stack size exceeded" on large files
for (var i = 0; i < len; i++) s += String.fromCharCode(u[i]);
return s;
}
function _hex(x) { return (x < 16 ? '0' : '') + x.toString(16); }
function SMF() {
var self = this;
if (!(self instanceof SMF)) {
self = new SMF();
delete self.ppqn;
}
var type = 1;
var ppqn = 96;
var fps;
var ppf;
if (arguments.length == 1) {
if (arguments[0] instanceof SMF) {
return arguments[0].copy();
}
if (arguments[0] instanceof SYX) {
self.type = 0;
self.ppqn = ppqn;
self.push(new MTrk());
for (var i = 0; i < arguments[0].length; i++) self[0].add(0, arguments[0][i]);
return self;
}
var data;
try {
if (arguments[0] instanceof ArrayBuffer) {
data = _u8a2s(new Uint8Array(arguments[0]));
}
}
catch (err) {/**/}
try {
if (arguments[0] instanceof Uint8Array || arguments[0] instanceof Int8Array) {
data = _u8a2s(new Uint8Array(arguments[0]));
}
}
catch (err) {/**/}
try {
/* istanbul ignore next */
if (arguments[0] instanceof Buffer) {
data = arguments[0].toString('binary');
}
}
catch (err) {/**/}
if (typeof arguments[0] == 'string' && arguments[0] != '0' && arguments[0] != '1' && arguments[0] != '2') {
data = arguments[0];
}
if (data == '') _error('Empty file');
if (data) {
self.load(data);
return self;
}
type = parseInt(arguments[0]);
}
else if (arguments.length == 2) {
type = parseInt(arguments[0]);
ppqn = parseInt(arguments[1]);
}
else if (arguments.length == 3) {
type = parseInt(arguments[0]);
fps = parseInt(arguments[1]);
ppf = parseInt(arguments[2]);
}
else if (arguments.length) _error('Invalid parameters');
if (isNaN(type) || type < 0 || type > 2) _error('Invalid parameters');
self.type = type;
if (typeof fps == 'undefined') {
if (isNaN(ppqn) || ppqn < 0 || ppqn > 0xffff) _error('Invalid parameters');
self.ppqn = ppqn;
}
else {
if (fps != 24 && fps != 25 && fps != 29 && fps != 30) _error('Invalid parameters');
if (isNaN(ppf) || ppf < 0 || ppf > 0xff) _error('Invalid parameters');
self.fps = fps;
self.ppf = ppf;
}
return self;
}
SMF.version = function() { return _ver; };
SMF.num4 = _num4;
SMF.prototype = [];
SMF.prototype.constructor = SMF;
SMF.prototype.copy = function() {
var smf = new SMF();
smf.type = this.type;
smf.ppqn = this.ppqn;
smf.fps = this.fps;
smf.ppf = this.ppf;
smf.rmi = this.rmi;
smf.ntrk = this.ntrk;
for (var i = 0; i < this.length; i++) smf.push(this[i].copy());
return smf;
};
function _issue(off, msg, data, tick, track) {
var w = { off: off, msg: msg, data: data };
if (typeof tick != 'undefined') w.tick = tick;
if (typeof track != 'undefined') w.track = track;
return w;
}
SMF.prototype._complain = function(off, msg, data) {
if (!this._warn) this._warn = [];
this._warn.push(_issue(off, msg, data));
};
SMF.prototype.load = function(s) {
var off = 0;
if (s.substr(0, 4) == 'RIFF' && s.substr(8, 8) == 'RMIDdata') {
this.rmi = true;
off = 20;
s = s.substr(20, s.charCodeAt(16) + s.charCodeAt(17) * 0x100 + s.charCodeAt(18) * 0x10000 + s.charCodeAt(19) * 0x1000000);
}
_loadSMF(this, s, off);
};
var MThd0006 = 'MThd' + String.fromCharCode(0) + String.fromCharCode(0) + String.fromCharCode(0) + String.fromCharCode(6);
function _loadSMF(self, s, off) {
if (s.substr(0, 8) != MThd0006) {
var z = s.indexOf(MThd0006);
if (z != -1) {
s = s.substr(z);
self._complain(off, 'Extra leading characters', z);
off += z;
}
else _error('Not a MIDI file');
}
self._off = off;
self.type = s.charCodeAt(8) * 16 + s.charCodeAt(9);
self._off_type = off + 8;
self.ntrk = s.charCodeAt(10) * 16 + s.charCodeAt(11);
self._off_ntrk = off + 10;
if (s.charCodeAt(12) > 0x7f) {
self.fps = 0x100 - s.charCodeAt(12);
self.ppf = s.charCodeAt(13);
self._off_fps = off + 12;
self._off_ppf = off + 13;
}
else{
self.ppqn = s.charCodeAt(12) * 256 + s.charCodeAt(13);
self._off_ppqn = off + 12;
}
if (self.type > 2) self._complain(8 + off, 'Invalid MIDI file type', self.type);
else if (self.type == 0 && self.ntrk > 1) self._complain(10 + off, 'Wrong number of tracks for the type 0 MIDI file', self.ntrk);
if (!self.ppf && !self.ppqn) _error('Invalid MIDI header');
var n = 0;
var p = 14;
while (p < s.length - 8) {
var offset = p + off;
var type = s.substr(p, 4);
if (type == 'MTrk') n++;
var len = (s.charCodeAt(p + 4) << 24) + (s.charCodeAt(p + 5) << 16) + (s.charCodeAt(p + 6) << 8) + s.charCodeAt(p + 7);
if (len <= 0) { // broken file
len = s.length - p - 8;
self._complain(p + off + 4, 'Invalid track length', s.charCodeAt(p + 4) + '/' + s.charCodeAt(p + 5) + '/' + s.charCodeAt(p + 6) + '/' + s.charCodeAt(p + 7));
}
p += 8;
var data = s.substr(p, len);
self.push(new Chunk(type, data, offset));
if (type == 'MThd') self._complain(offset, 'Unexpected chunk type', 'MThd');
p += len;
}
if (n != self.ntrk) {
self._complain(off + 10, 'Incorrect number of tracks', self.ntrk);
self.ntrk = n;
}
if (!self.ntrk) _error('No MIDI tracks');
if (!self.type && self.ntrk > 1 || self.type > 2) self.type = 1;
if (p < s.length) self._complain(off + p, 'Extra trailing characters', s.length - p);
if (p > s.length) self._complain(off + s.length, 'Incomplete data', p - s.length);
}
function Warn(obj) {
if (!(this instanceof Warn)) return new Warn(obj);
for (var k in obj) if (obj.hasOwnProperty(k)) this[k] = obj[k];
}
Warn.prototype.toString = function() {
var a = [];
if (typeof this.off != 'undefined') a.push('offset ' + this.off);
if (typeof this.track != 'undefined') a.push('track ' + this.track);
if (typeof this.tick != 'undefined') a.push('tick ' + this.tick);
a.push('--');
a.push(this.msg);
if (typeof this.data != 'undefined') a.push('(' + this.data + ')');
return a.join(' ');
};
SMF.prototype.tracks = function() {
var t = 0;
for (var i = 0; i < this.length; i++) if (this[i] instanceof MTrk) t++;
return t;
};
function _reset_state(w, s) {
var i;
for (i = 0; i < 16; i++) {
if (s[i]) {
if (s[i].rm && s[i].rl && s[i].rm[0][2] == 0x7f && s[i].rl[0][2] == 0x7f) {
s[i].rm[1] = true;
s[i].rl[1] = true;
}
_check_unused(w, s, i, 'bm');
_check_unused(w, s, i, 'bl');
_check_unused(w, s, i, 'nm');
_check_unused(w, s, i, 'nl');
_check_unused(w, s, i, 'rm');
_check_unused(w, s, i, 'rl');
}
s[i] = {};
}
}
function _update_state(w, s, msg) {
if (!msg.length || msg[0] < 0x80) return;
if (msg.isGmReset() || msg.isGsReset() || msg.isXgReset()) {
_reset_state(w, s);
return;
}
var st = msg[0] >> 4;
var ch = msg[0] & 15;
var m;
if (st == 0xb) {
switch (msg[1]) {
case 0:
_check_unused(w, s, ch, 'bm');
s[ch].bm = [msg, false];
break;
case 0x20:
_check_unused(w, s, ch, 'bl');
s[ch].bl = [msg, false];
break;
case 0x62:
_check_unused(w, s, ch, 'nl');
_check_unused(w, s, ch, 'rm');
_check_unused(w, s, ch, 'rl');
s[ch].nl = [msg, false];
break;
case 0x63:
_check_unused(w, s, ch, 'nm');
_check_unused(w, s, ch, 'rm');
_check_unused(w, s, ch, 'rl');
s[ch].nm = [msg, false];
break;
case 0x64:
_check_unused(w, s, ch, 'rl');
_check_unused(w, s, ch, 'nm');
_check_unused(w, s, ch, 'nl');
s[ch].rl = [msg, false];
break;
case 0x65:
_check_unused(w, s, ch, 'rm');
_check_unused(w, s, ch, 'nm');
_check_unused(w, s, ch, 'nl');
s[ch].rm = [msg, false];
break;
case 0x6: case 0x26: case 0x60: case 0x61:
if (s[ch].rm && s[ch].rl) {
s[ch].rm[1] = true;
s[ch].rl[1] = true;
}
if (s[ch].rm && !s[ch].rl && !s[ch].rm[1]) {
m = s[ch].rm[0];
w.push(_issue(m._off, 'No matching RPN LSB', m.toString(), m.tt, m.track));
s[ch].rm[1] = true;
}
if (!s[ch].rm && s[ch].rl && !s[ch].rl[1]) {
m = s[ch].rl[0];
w.push(_issue(m._off, 'No matching RPN MSB', m.toString(), m.tt, m.track));
s[ch].rl[1] = true;
}
if (s[ch].nm && s[ch].nl) {
s[ch].nm[1] = true;
s[ch].nl[1] = true;
}
if (s[ch].nm && !s[ch].nl && !s[ch].nm[1]) {
m = s[ch].nm[0];
w.push(_issue(m._off, 'No matching NRPN LSB', m.toString(), m.tt, m.track));
s[ch].nm[1] = true;
}
if (!s[ch].nm && s[ch].nl && !s[ch].nl[1]) {
m = s[ch].nl[0];
w.push(_issue(m._off, 'No matching NRPN MSB', m.toString(), m.tt, m.track));
s[ch].nl[1] = true;
}
if (!s[ch].rm && !s[ch].rl && !s[ch].nm && !s[ch].nl) {
w.push(_issue(msg._off, 'RPN/NRPN not set', msg.toString(), msg.tt, msg.track));
}
if (s[ch].rm && s[ch].rl && s[ch].rm[0][2] == 0x7f && s[ch].rl[0][2] == 0x7f) {
w.push(_issue(msg._off, 'RPN/NRPN not set', msg.toString(), msg.tt, msg.track));
}
break;
}
return;
}
if (st == 0xc) {
if (s[ch].bm) s[ch].bm[1] = true;
if (s[ch].bl) s[ch].bl[1] = true;
if (s[ch].bl && !s[ch].bm) {
m = s[ch].bl[0];
w.push(_issue(m._off, 'No matching Bank Select MSB', m.toString(), m.tt, m.track));
}
if (s[ch].bm && !s[ch].bl) {
m = s[ch].bm[0];
w.push(_issue(m._off, 'No matching Bank Select LSB', m.toString(), m.tt, m.track));
}
}
}
function _check_unused(w, s, c, x) {
if (s[c][x] && !s[c][x][1]) {
var str;
switch (x) {
case 'bm': case 'bl': str = 'Unnecessary Bank Select'; break;
case 'nm': case 'nl': str = 'Unnecessary NRPN'; break;
case 'rm': case 'rl': str = 'Unnecessary RPN'; break;
}
var m = s[c][x][0];
w.push(_issue(m._off, str, m.toString(), m.tt, m.track));
delete s[c][x];
}
}
SMF.prototype.validate = function() {
var i, k, z;
var w = [];
if (this._warn) for (i = 0; i < this._warn.length; i++) w.push(Warn(this._warn[i]));
var mm = _sort(this);
k = 0;
for (i = 0; i < this.length; i++) if (this[i] instanceof MTrk) {
this[i]._validate(w, k);
k++;
}
var st = {};
_reset_state(w, st);
for (i = 0; i < mm.length; i++) {
z = _validate_midi(mm[i], this.type == 1);
if (z) {
z.track = mm[i].track;
w.push(z);
}
_update_state(w, st, mm[i]);
}
_reset_state(w, st);
w.sort(function(a, b) {
return (a.off || 0) - (b.off || 0) || (a.track || 0) - (b.track || 0) || (a.tick || 0) - (b.tick || 0);
});
if (w.length) {
for (i = 0; i < w.length; i++) w[i] = Warn(w[i]);
return w;
}
};
SMF.prototype.dump = function(rmi) {
var s = '';
if (rmi) {
s = this.dump();
return 'RIFF' + _num4le(s.length + 12) + 'RMIDdata' + _num4le(s.length) + s;
}
this.ntrk = 0;
for (var i = 0; i < this.length; i++) {
if (this[i] instanceof MTrk) this.ntrk++;
s += this[i].dump();
}
s = (this.ppqn ? _num2(this.ppqn) : String.fromCharCode(0x100 - this.fps) + String.fromCharCode(this.ppf)) + s;
s = MThd0006 + String.fromCharCode(0) + String.fromCharCode(this.type) + _num2(this.ntrk) + s;
return s;
};
SMF.prototype.toBuffer = function(rmi) {
return Buffer.from(this.dump(rmi), 'binary');
};
SMF.prototype.toUint8Array = function(rmi) {
var str = this.dump(rmi);
var buf = new ArrayBuffer(str.length);
var arr = new Uint8Array(buf);
for (var i = 0; i < str.length; i++) arr[i] = str.charCodeAt(i);
return arr;
};
SMF.prototype.toArrayBuffer = function(rmi) {
return this.toUint8Array(rmi).buffer;
};
SMF.prototype.toInt8Array = function(rmi) {
return new Int8Array(this.toArrayBuffer(rmi));
};
SMF.prototype.toString = function() {
var i;
this.ntrk = 0;
for (i = 0; i < this.length; i++) if (this[i] instanceof MTrk) this.ntrk++;
var a = ['SMF:', ' type: ' + this.type];
if (this.ppqn) a.push(' ppqn: ' + this.ppqn);
else a.push(' fps: ' + this.fps, ' ppf: ' + this.ppf);
a.push(' tracks: ' + this.ntrk);
for (i = 0; i < this.length; i++) {
a.push(this[i].toString());
}
return a.join('\n');
};
function _var2num(s) {
if (!s.length) return 0; // missing last byte
if (s.charCodeAt(0) < 0x80) return [1, s.charCodeAt(0)];
var x = s.charCodeAt(0) & 0x7f;
x <<= 7;
if (s.charCodeAt(1) < 0x80) return [2, x + s.charCodeAt(1)];
x += s.charCodeAt(1) & 0x7f;
x <<= 7;
if (s.charCodeAt(2) < 0x80) return [3, x + s.charCodeAt(2)];
x += s.charCodeAt(2) & 0x7f;
x <<= 7;
x += s.charCodeAt(3) & 0x7f;
return [4, s.charCodeAt(3) < 0x80 ? x : -x];
}
function _msglen(n) {
switch (n & 0xf0) {
case 0x80: case 0x90: case 0xa0: case 0xb0: case 0xe0: return 2;
case 0xc0: case 0xD0: return 1;
}
switch (n) {
case 0xf1: case 0xf3: return 1;
case 0xf2: return 2;
}
return 0;
}
function _sort(smf) {
var i, j;
var tt = [];
var mm = [];
for (i = 0; i < smf.length; i++) if (smf[i] instanceof MTrk) tt.push(smf[i]);
if (smf.type != 1) {
for (i = 0; i < tt.length; i++) {
for (j = 0; j < tt[i].length; j++) {
tt[i][j].track = i;
mm.push(tt[i][j]);
}
}
}
else {
var t = 0;
var pp = [];
for (i = 0; i < tt.length; i++) pp[i] = 0;
while (true) {
var b = true;
var m = 0;
for (i = 0; i < tt.length; i++) {
while (pp[i] < tt[i].length && tt[i][pp[i]].tt == t) {
tt[i][pp[i]].track = i;
mm.push(tt[i][pp[i]]);
pp[i]++;
}
if (pp[i] >= tt[i].length) continue;
if (b) m = tt[i][pp[i]].tt;
b = false;
if (m > tt[i][pp[i]].tt) m = tt[i][pp[i]].tt;
}
t = m;
if (b) break;
}
}
return mm;
}
SMF.prototype.annotate = function() {
var mm = _sort(this);
var ctxt = JZZ.Context();
for (var i = 0; i < mm.length; i++) {
if (mm[i].lbl) mm[i].lbl = undefined;
ctxt._read(mm[i]);
}
return this;
};
SMF.prototype.player = function() {
var pl = new Player();
pl.ppqn = this.ppqn;
pl.fps = this.fps;
pl.ppf = this.ppf;
var i;
var e;
var mm = _sort(this);
if (this.type == 2) {
var tr = 0;
var m = 0;
var t = 0;
for (i = 0; i < mm.length; i++) {
e = JZZ.MIDI(mm[i]);
if (tr != e.track) {
tr = e.track;
m = t;
}
t = e.tt + m;
e.tt = t;
pl._data.push(e);
}
}
else {
for (i = 0; i < mm.length; i++) {
e = JZZ.MIDI(mm[i]);
pl._data.push(e);
}
}
pl._type = this.type;
pl._tracks = this.tracks();
pl._timing();
return pl;
};
function Chunk(t, d, off) {
if (!(this instanceof Chunk)) return new Chunk(t, d, off);
var i;
if (this.sub[t]) return this.sub[t](t, d, off);
if (typeof t != 'string' || t.length != 4) _error("Invalid chunk type: " + t);
for (i = 0; i < t.length; i++) if (t.charCodeAt(i) < 0 || t.charCodeAt(i) > 255) _error("Invalid chunk type: " + t);
if (typeof d != 'string') _error("Invalid data type: " + d);
for (i = 0; i < d.length; i++) if (d.charCodeAt(i) < 0 || d.charCodeAt(i) > 255) _error("Invalid data character: " + d[i]);
this.type = t;
this.data = d;
this._off = off;
}
SMF.Chunk = Chunk;
Chunk.prototype = [];
Chunk.prototype.constructor = Chunk;
Chunk.prototype.copy = function() { return new Chunk(this.type, this.data); };
Chunk.prototype.sub = {
'MTrk': function(t, d, off) { return new MTrk(d, off); }
};
Chunk.prototype.dump = function() {
return this.type + _num4(this.data.length) + this.data;
};
Chunk.prototype.toString = function() {
return this.type + ': ' + this.data.length + ' bytes';
};
function _validate_msg_data(trk, s, p, m, t, off) {
var x = s.substr(p, m);
if (x.length < m) {
trk._complain(off, 'Incomplete track data', m - x.length, t);
x = (x + '\x00\x00').substr(0, m);
}
for (var i = 0; i < m; i++) if (x.charCodeAt(i) > 127) {
trk._complain(off + i, 'Bad MIDI value set to 0', x.charCodeAt(i), t);
x = x.substr(0, i) + '\x00' + x.substr(i + 1);
}
return x;
}
function _validate_number(trk, s, off, t, tt) {
var nn = _var2num(s);
if (tt) t += nn[1];
if (nn[1] < 0) {
nn[1] = -nn[1];
trk._complain(off, "Bad byte sequence", s.charCodeAt(0) + '/' + s.charCodeAt(1) + '/' + s.charCodeAt(2) + '/' + s.charCodeAt(3), t);
}
else if (nn[0] == 4 && nn[1] < 0x200000) {
trk._complain(off, "Long VLQ value", s.charCodeAt(0) + '/' + s.charCodeAt(1) + '/' + s.charCodeAt(2) + '/' + s.charCodeAt(3), t);
}
else if (nn[0] == 3 && nn[1] < 0x4000) {
trk._complain(off, "Long VLQ value", s.charCodeAt(0) + '/' + s.charCodeAt(1) + '/' + s.charCodeAt(2), t);
}
else if (nn[0] == 2 && nn[1] < 0x80) {
trk._complain(off, "Long VLQ value", s.charCodeAt(0) + '/' + s.charCodeAt(1), t);
}
return nn;
}
function MTrk(s, off) {
if (!(this instanceof MTrk)) return new MTrk(s, off);
this._off = off;
this._orig = this;
this._tick = 0;
if(typeof s == 'undefined') {
this.push(new Event(0, '\xff\x2f', ''));
return;
}
var t = 0;
var p = 0;
var w = '';
var st;
var m;
off += 8;
var offset = p + off;
while (p < s.length) {
m = _validate_number(this, s.substr(p, 4), offset, t, true);
p += m[0];
t += m[1];
offset = p + off;
if (s.charCodeAt(p) == 0xff) {
st = s.substr(p, 2);
if (st.length < 2) {
this._complain(offset, 'Incomplete track data', 3 - st.length, t);
st = '\xff\x2f';
}
p += 2;
m = _validate_number(this, s.substr(p, 4), offset + 2, t);
p += m[0];
this.push (new Event(t, st, s.substr(p, m[1]), offset));
p += m[1];
}
else if (s.charCodeAt(p) == 0xf0 || s.charCodeAt(p) == 0xf7) {
st = s.substr(p, 1);
p += 1;
m = _validate_number(this, s.substr(p, 4), offset + 1, t);
p += m[0];
this.push(new Event(t, st, s.substr(p, m[1]), offset));
p += m[1];
}
else if (s.charCodeAt(p) & 0x80) {
w = s.substr(p, 1);
p += 1;
m = _msglen(w.charCodeAt(0));
if (w.charCodeAt(0) > 0xf0) this._complain(offset, 'Unexpected MIDI message', w.charCodeAt(0).toString(16), t);
this.push(new Event(t, w, _validate_msg_data(this, s, p, m, t, offset + 1), offset));
p += m;
}
else if (w.charCodeAt(0) & 0x80) { // running status
m = _msglen(w.charCodeAt(0));
if (w.charCodeAt(0) > 0xf0) this._complain(offset, 'Unexpected MIDI message', w.charCodeAt(0).toString(16), t);
this.push(new Event(t, w, _validate_msg_data(this, s, p, m, t, offset), offset));
p += m;
}
}
}
SMF.MTrk = MTrk;
MTrk.prototype = [];
MTrk.prototype.constructor = MTrk;
MTrk.prototype.type = 'MTrk';
MTrk.prototype.copy = function() {
var trk = new MTrk();
trk.length = 0;
for (var i = 0; i < this.length; i++) trk.push(new JZZ.MIDI(this[i]));
return trk;
};
function _shortmsg(msg) {
var s = msg.toString();
if (s.length > 80) {
s = s.substr(0, 78);
s = s.substr(0, s.lastIndexOf(' ')) + ' ...';
}
return s;
}
function _metaevent_len(msg, name, len) {
if (msg.dd.length < len) return _issue(msg._off, 'Invalid ' + name + ' meta event: ' + (msg.dd.length ? 'data too short' : 'no data'), _shortmsg(msg), msg.tt);
if (msg.dd.length > len) return _issue(msg._off, 'Invalid ' + name + ' meta event: data too long', _shortmsg(msg), msg.tt);
}
function _timing_first_track(msg, name) {
return _issue(msg._off, name + ' meta events must be in the first track', _shortmsg(msg), msg.tt);
}
function _validate_midi(msg, t1) {
var issue;
if (typeof msg.ff != 'undefined') {
if (msg.ff > 0x7f) return _issue(msg._off, 'Invalid meta event', _shortmsg(msg), msg.tt);
else if (msg.ff == 0) {
issue = _metaevent_len(msg, 'Sequence Number', 2); if (issue) return issue;
}
else if (msg.ff < 10) {
if (!msg.dd.length) return _issue(msg._off, 'Invalid Text meta event: no data', _shortmsg(msg), msg.tt);
}
else if (msg.ff == 32) {
issue = _metaevent_len(msg, 'Channel Prefix', 1); if (issue) return issue;
if (msg.dd.charCodeAt(0) > 15) return _issue(msg._off, 'Invalid Channel Prefix meta event: incorrect data', _shortmsg(msg), msg.tt);
}
else if (msg.ff == 33) {
issue = _metaevent_len(msg, 'MIDI Port', 1); if (issue) return issue;
if (msg.dd.charCodeAt(0) > 127) return _issue(msg._off, 'Invalid MIDI Port meta event: incorrect data', _shortmsg(msg), msg.tt);
}
else if (msg.ff == 47) {
issue = _metaevent_len(msg, 'End of Track', 0); if (issue) return issue;
}
else if (msg.ff == 81) {
issue = _metaevent_len(msg, 'Tempo', 3); if (issue) return issue;
if (t1 && msg.track) return _timing_first_track(msg, 'Tempo');
}
else if (msg.ff == 84) {
issue = _metaevent_len(msg, 'SMPTE', 5); if (issue) return issue;
if ((msg.dd.charCodeAt(0) & 0x1f) >= 24 || msg.dd.charCodeAt(1) >= 60 || msg.dd.charCodeAt(2) >= 60 || msg.dd.charCodeAt(3) >= 30 || msg.dd.charCodeAt(4) >= 200 || msg.dd.charCodeAt(4) % 25) return _issue(msg._off, 'Invalid SMPTE meta event: incorrect data', _shortmsg(msg), msg.tt);
else if ((msg.dd.charCodeAt(0) >> 5) > 3) return _issue(msg._off, 'Invalid SMPTE meta event: incorrect format', msg.dd.charCodeAt(0) >> 5, msg.tt);
if (t1 && msg.track) return _timing_first_track(msg, 'SMPTE');
}
else if (msg.ff == 88) {
issue = _metaevent_len(msg, 'Time Signature', 4); if (issue) return issue;
if (msg.dd.charCodeAt(1) > 8) return _issue(msg._off, 'Invalid Time Signature meta event: incorrect data', _shortmsg(msg), msg.tt);
if (t1 && msg.track) return _timing_first_track(msg, 'Time Signature');
}
else if (msg.ff == 89) {
issue = _metaevent_len(msg, 'Key Signature', 2); if (issue) return issue;
if (msg.dd.charCodeAt(1) > 1 || msg.dd.charCodeAt(0) > 255 || (msg.dd.charCodeAt(0) > 7 && msg.dd.charCodeAt(0) < 249)) return _issue(msg._off, 'Invalid Key Signature meta event: incorrect data', msg.toString(), msg.tt);
}
else if (msg.ff == 127) {
// Sequencer Specific meta event
}
else {
return _issue(msg._off, 'Unknown meta event', _shortmsg(msg), msg.tt);
}
}
else {
//
}
}
MTrk.prototype._validate = function(w, k) {
var i, z;
if (this._warn) for (i = 0; i < this._warn.length; i++) {
z = Warn(this._warn[i]);
z.track = k;
w.push(z);
}
};
MTrk.prototype._complain = function(off, msg, data, tick) {
if (!this._warn) this._warn = [];
this._warn.push(_issue(off, msg, data, tick));
};
MTrk.prototype.dump = function() {
var s = '';
var t = 0;
var m = '';
var i, j;
for (i = 0; i < this.length; i++) {
s += _num(this[i].tt - t);
t = this[i].tt;
if (typeof this[i].dd != 'undefined') {
s += '\xff';
s += String.fromCharCode(this[i].ff);
s += _num(this[i].dd.length);
s += this[i].dd;
}
else if (this[i][0] == 0xf0 || this[i][0] == 0xf7) {
s += String.fromCharCode(this[i][0]);
s += _num(this[i].length - 1);
for (j = 1; j < this[i].length; j++) s += String.fromCharCode(this[i][j]);
}
else {
if (this[i][0] != m) {
m = this[i][0];
s += String.fromCharCode(this[i][0]);
}
for (j = 1; j < this[i].length; j++) s += String.fromCharCode(this[i][j]);
}
}
return 'MTrk' + _num4(s.length) + s;
};
MTrk.prototype.toString = function() {
var a = ['MTrk:'];
for (var i = 0; i < this.length; i++) {
a.push(this[i].tt + ': ' + this[i].toString());
}
return a.join('\n ');
};
MTrk.prototype.add = function(t, msg) {
t = parseInt(t);
if(isNaN(t) || t < 0) _error('Invalid parameter');
msg = JZZ.MIDI(msg);
msg.tt = t;
if (this[this._orig.length - 1].tt < t) this[this._orig.length - 1].tt = t; // end of track
if (msg.ff == 0x2f || msg[0] > 0xf0 && msg[0] != 0xf7) return this;
var i;
for (i = 0; i < this._orig.length - 1; i++) {
if (this._orig[i].tt > t) break;
}
this._orig.splice(i, 0, msg);
return this;
};
MTrk.prototype._sxid = 0x7f;
MTrk.prototype._image = function() {
var F = function() {}; F.prototype = this._orig;
var img = new F();
img._ch = this._ch;
img._sxid = this._sxid;
img._tick = this._tick;
return img;
};
MTrk.prototype.send = function(msg) { this._orig.add(this._tick, msg); return this; };
MTrk.prototype.tick = function(t) {
if (t != parseInt(t) || t < 0) throw RangeError('Bad tick value: ' + t);
if (!t) return this;
var img = this._image();
img._tick = this._tick + t;
return img;
};
MTrk.prototype.sxId = function(id) {
if (typeof id == 'undefined') id = MTrk.prototype._sxid;
if (id == this._sxid) return this;
if (id != parseInt(id) || id < 0 || id > 0x7f) throw RangeError('Bad MIDI value: ' + id);
var img = this._image();
img._sxid = id;
return img;
};
MTrk.prototype.ch = function(c) {
if (c == this._ch || typeof c == 'undefined' && typeof this._ch == 'undefined') return this;
if (typeof c != 'undefined') {
if (c != parseInt(c) || c < 0 || c > 15) throw RangeError('Bad channel value: ' + c + ' (must be from 0 to 15)');
}
var img = this._image();
img._ch = c;
return img;
};
MTrk.prototype.note = function(c, n, v, t) {
this.noteOn(c, n, v);
if (typeof this._ch == 'undefined') {
if (t > 0) this.tick(t).noteOff(c, n);
}
else {
if (v > 0) this.tick(v).noteOff(c);
}
return this;
};
JZZ.lib.copyMidiHelpers(MTrk);
function Event(t, s, d, off) {
var midi;
if (s.charCodeAt(0) == 0xff) {
midi = JZZ.MIDI.smf(s.charCodeAt(1), d);
}
else {
var a = [s.charCodeAt(0)];
for (var i = 0; i < d.length; i++) a.push(d.charCodeAt(i));
midi = JZZ.MIDI(a);
}
if (typeof off != 'undefined') midi._off = off;
midi.tt = t;
return midi;
}
function Player() {
var self = new JZZ.Widget();
self._info.name = 'MIDI Player';
self._info.manufacturer = 'Jazz-Soft';
self._info.version = _ver;
self.playing = false;
self._loop = 0;
self._data = [];
self._hdr = [];
self._pos = 0;
self._tick = (function(x) { return function(){ x.tick(); }; })(self);
for (var k in Player.prototype) if (Player.prototype.hasOwnProperty(k)) self[k] = Player.prototype[k];
return self;
}
Player.prototype.onEnd = function() {};
Player.prototype.loop = function(n) {
if (n == parseInt(n) && n > 0) this._loop = n;
else this._loop = n ? -1 : 0;
};
Player.prototype.play = function() {
this.event = undefined;
this.playing = true;
this.paused = false;
this._ptr = 0;
this._pos = 0;
this._p0 = 0;
this._t0 = _now();
this._list = this._hdr;
this.tick();
};
Player.prototype.stop = function() {
this._pos = 0;
this.playing = false;
this.event = 'stop';
this.paused = undefined;
};
Player.prototype.pause = function() {
this.event = 'pause';
};
Player.prototype.resume = function() {
if (this.playing) return;
if (this.paused) {
this.event = undefined;
this._t0 = _now();
this.playing = true;
this.paused = false;
this.tick();
}
else this.play();
};
Player.prototype.sndOff = function() {
var c;
for (c = 0; c < 16; c++) this._emit(JZZ.MIDI.allSoundOff(c));
for (c = 0; c < 16; c++) this._emit(JZZ.MIDI.resetAllControllers(c));
};
function _filter(e) { this._receive(e); }
Player.prototype._filter = _filter;
Player.prototype.filter = function(f) {
this._filter = f instanceof Function ? f : _filter;
};
Player.prototype._receive = function(e) {
if (e.isTempo() && this.ppqn) {
this._mul = this.ppqn * (e.isMidi2 ? 100000.0 : 1000.0) / (e.getTempo() || 1);
this.mul = this._mul * this._speed;
this._t0 = _now();
this._p0 = this._pos;
}
this._emit(e);
};
Player.prototype.tick = function() {
var t = _now();
var e;
this._pos = this._p0 + (t - this._t0) * this.mul;
for(; this._ptr < this._list.length; this._ptr++) {
e = this._list[this._ptr];
if (e.tt > this._pos) break;
this._filter(e);
}
if (this._ptr >= this._list.length) {
if (this._list == this._hdr) {
this._list = this._data;
this._ptr = 0;
this._p0 = 0;
this._t0 = t;
}
else {
if (this._loop && this._loop != -1) this._loop--;
if (this._loop) {
this._ptr = 0;
this._p0 = 0;
this._t0 = t;
}
else this.stop();
this.onEnd();
}
}
if (this.event == 'stop') {
this.playing = false;
this.paused = false;
this._pos = 0;
this._ptr = 0;
this.sndOff();
this.event = undefined;
}
if (this.event == 'pause') {
this.playing = false;
this.paused = true;
if (this._pos >= this._duration) this._pos = this._duration - 1;
this._p0 = this._pos;
this.sndOff();
this.event = undefined;
}
if (this.playing) JZZ.lib.schedule(this._tick);
};
Player.prototype.trim = function() {
var i, j, e;
var data = [];
j = 0;
for (i = 0; i < this._data.length; i++) {
e = this._data[i];
if (e.length || e.ff == 1 || e.ff == 5) {
for (; j <= i; j++) data.push(this._data[j]);
}
}
var dt = (i ? this._data[i - 1].tt : 0) - (j ? this._data[j - 1].tt : 0);
this._data = data;
this._timing();
return dt;
};
Player.prototype._timing = function() {
var i, m, t, e;
this._duration = this._data.length ? this._data[this._data.length - 1].tt : 0;
this._ttt = [];
if (this.ppqn) {
this._mul = this.ppqn / 500.0; // 120 bpm
m = this._mul;
for (i = 0; i < this._hdr.length; i++) {