strtok.parse(self.stream, function(v, cb) {
if (!v) {
cb.commentsRead = 0;
cb.position = 'header'; //read first OggS header
return new strtok.BufferType(27);
}
if (cb.position === 'header') {
cb.header = {
type: v.toString('utf-8', 0, 4),
version: v[4],
packet_flag: v[5],
pcm_sample_pos: 'not_implemented',
stream_serial_num: strtok.UINT32_LE.get(v, 14),
page_number: strtok.UINT32_LE.get(v, 18),
check_sum: strtok.UINT32_LE.get(v, 22),
segments: v[26]
};
//read segment table
cb.position = 'segments';
return new strtok.BufferType(cb.header.segments);
}
if (cb.position === 'segments') {
var pageLen = 0;
for (var i=0; i < v.length; i++) {
pageLen += v[i];
}
cb.position = 'page_data';
return new strtok.BufferType(pageLen);
}
//TODO: fix this crappy hack, we should be emitting
// data and parsing it with another parser
// but that isn't working atm. What we are doing
// here is attempting to read all the metadata
// everytime we read a ogg page.
//
if (cb.position === 'page_data') {
if (cb.header.page_number >= 1) {
v.copy(bigBuf, copy_offset);
copy_offset += v.length;
try {
parseMetadata();
self.emit('done');
return strtok.DONE;
} catch (ex) {}
}
cb.position = 'header';
return new strtok.BufferType(27);
}
})
strtok.parse(stream, function (v, cb) {
try {
if (!v) {
cb.state = 0;
return new strtok.BufferType(27);
}
switch (cb.state) {
case 0: // header
cb.header = {
type: v.toString(0, 4),
version: v[4],
packet_flag: v[5],
pcm_sample_pos: 'not_implemented',
stream_serial_num: strtok.UINT32_LE.get(v, 14),
page_number: strtok.UINT32_LE.get(v, 18),
check_sum: strtok.UINT32_LE.get(v, 22),
segments: v[26]
}
cb.state++;
return new strtok.BufferType(cb.header.segments);
case 1: // segments
var pageLen = 0;
for (var i = 0; i < v.length; i++) {
pageLen += v[i];
}
cb.state++;
return new strtok.BufferType(pageLen);
case 2: // page data
if (cb.header.page_number >= 1) {
innerStream.emit('data', new Buffer(v));
}
cb.state = 0;
return new strtok.BufferType(27);
}
} catch (exception) {
callback('done', exception);
return strtok.DONE;
}
})