Sample* ZInstrument::readSample(const QString& s, MQZipReader* uz)
{
if (uz) {
QList<MQZipReader::FileInfo> fi = uz->fileInfoList();
buf = uz->fileData(s);
if (buf.isEmpty()) {
printf("Sample::read: cannot read sample data <%s>\n", qPrintable(s));
return 0;
}
}
else {
QFile f(s);
if (!f.open(QIODevice::ReadOnly)) {
printf("Sample::read: open <%s> failed\n", qPrintable(s));
return 0;
}
buf = f.readAll();
}
AudioFile a;
if (!a.open(buf)) {
printf("open <%s> failed: %s\n", qPrintable(s), a.error());
return 0;
}
int channel = a.channels();
int frames = a.frames();
int sr = a.samplerate();
short* data = new short[(frames + 3) * channel];
Sample* sa = new Sample(channel, data, frames, sr);
sa->setLoopStart(a.loopStart());
sa->setLoopEnd(a.loopEnd());
sa->setLoopMode(a.loopMode());
if (frames != a.read(data + channel, frames)) {
qDebug("Sample read failed: %s\n", a.error());
delete sa;
sa = 0;
}
for (int i = 0; i < channel; ++i) {
data[i] = data[channel + i];
data[(frames-1) * channel + i] = data[(frames-3) * channel + i];
data[(frames-2) * channel + i] = data[(frames-3) * channel + i];
}
return sa;
}
bool Sample::decompressOggVorbis(char* src, int size)
{
AudioFile af;
QByteArray ba(src, size);
start = 0;
end = 0;
if (!af.open(ba)) {
qDebug("Sample::decompressOggVorbis: open failed: %s", af.error());
return false;
}
int frames = af.frames();
data = new short[frames * af.channels()];
if (frames != af.readData(data, frames)) {
qDebug("Sample read failed: %s", af.error());
delete[] data;
data = 0;
}
end = frames - 1;
if (loopend > end ||loopstart >= loopend || loopstart <= start) {
/* can pad loop by 8 samples and ensure at least 4 for loop (2*8+4) */
if ((end - start) >= 20) {
loopstart = start + 8;
loopend = end - 8;
}
else { // loop is fowled, sample is tiny (can't pad 8 samples)
loopstart = start + 1;
loopend = end - 1;
}
}
if ((end - start) < 8) {
qDebug("invalid sample");
setValid(false);
}
return true;
}
