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AudioExtractor::AudioExtractor(QObject *parent)
: QObject(parent)
{
}
float *AudioExtractor::load(QString file, size_t *size)
{
float *data;
SF_INFO sf_info;
SNDFILE *fh = sf_open(file.toStdString().c_str(), SFM_READ, &sf_info);
if(!fh) {
printf("Load error...\n");
*size = 0;
return NULL;
}
*size = sf_info.frames;
data = new float[*size];
sf_read_float(fh, data, *size);
sf_close(fh);
return data;
}
void AudioExtractor::exportSelection(QString filename,
int index,
float *data, size_t size,
Selection sel)
{
printf("Writing: %s (sz: %d, from %d to %d)\n",
filename.toStdString().c_str(), size, sel.from, sel.to);
if(sel.from > (int)size ||
sel.to > (int)size ||
sel.to < 0 ||
sel.from < 0 ||
sel.to < sel.from) {
printf("Out of bounds\n");
return;
}
for(int i = 0; i < sel.fadein; i++) {
float val = ((float)i / (float)sel.fadein);
data[i + sel.from] *= val;
}
for(int i = 0; i < sel.fadeout; i++) {
float val = ((float)i / (float)sel.fadeout);
data[sel.to - i] *= val;
}
SF_INFO sf_info;
sf_info.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT;
sf_info.samplerate = 44100;
sf_info.channels = 1;
SNDFILE *fh = sf_open(filename.toStdString().c_str(), SFM_WRITE, &sf_info);
if(!fh) {
printf("Open for write error...\n");
return;
}
sf_write_float(fh, data + sel.from, sel.to - sel.from);
sf_close(fh);
}
void AudioExtractor::exportSelections(Selections selections,
Levels levels)
{
AudioFileList::iterator j = audiofiles.begin();
while(j != audiofiles.end()) {
QString file = j->first;
QString name = j->second;
size_t size;
float *data = load(file, &size);
if(!data) continue;
int index = 0;
QMap<int, Selection>::iterator i = selections.begin();
while(i != selections.end()) {
index++;
QString path = exportpath + "/" + prefix + "/samples";
QString file = path + "/" + QString::number(index) +
"-" + prefix + "-" + name + ".wav";
QDir d;
d.mkpath(path);
exportSelection(file, index, data, size, i.value());
i++;
}
delete[] data;
j++;
}
QDomDocument doc;
QDomProcessingInstruction header =
doc.createProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");
doc.appendChild(header);
QDomElement instrument = doc.createElement("instrument");
instrument.setAttribute("name", prefix);
doc.appendChild(instrument);
QDomElement samples = doc.createElement("samples");
instrument.appendChild(samples);
int index = 0;
QMap<int, Selection>::iterator i = selections.begin();
while(i != selections.end()) {
index++;
i->name = prefix + "-" + QString::number(index);
QDomElement sample = doc.createElement("sample");
sample.setAttribute("name", i->name);
samples.appendChild(sample);
AudioFileList::iterator j = audiofiles.begin();
while(j != audiofiles.end()) {
QString file = j->first;
QString name = j->second;
QDomElement audiofile = doc.createElement("audiofile");
audiofile.setAttribute("file", "samples/" +
QString::number(index) + "-" + prefix +
"-" + name + ".wav");
audiofile.setAttribute("channel", name);
sample.appendChild(audiofile);
j++;
}
i++;
}
QDomElement velocities = doc.createElement("velocities");
instrument.appendChild(velocities);
Levels::iterator k = levels.begin();
while(k != levels.end()) {
Levels::iterator nxt = k;
nxt++;
float next;
if(nxt == levels.end()) next = 1.0;
else next = nxt->velocity;
QDomElement velocity = doc.createElement("velocity");
velocity.setAttribute("lower", k->velocity);
velocity.setAttribute("upper", next);
velocities.appendChild(velocity);
QMap<float, Selection>::iterator i = k->selections.begin();
while(i != k->selections.end()) {
QMap<int, Selection>::iterator j = selections.begin();
while(j != selections.end()) {
if(i->from == j->from && i->to == j->to) {
QDomElement sampleref = doc.createElement("sampleref");
sampleref.setAttribute("name", j->name);
sampleref.setAttribute("probability",
1.0 / (double)k->selections.size());
velocity.appendChild(sampleref);
}
j++;
}
i++;
}
k++;
}
QFile xmlfile(exportpath + "/" + prefix + "/" + prefix + ".xml");
xmlfile.open(QIODevice::WriteOnly);
xmlfile.write(doc.toByteArray());
xmlfile.close();
}
void AudioExtractor::addFile(QString file, QString name)
{
QPair<QString, QString> pair;
pair.first = file;
pair.second = name;
audiofiles.push_back(pair);
}
void AudioExtractor::removeFile(QString file, QString name)
{
AudioFileList::iterator j = audiofiles.begin();
while(j != audiofiles.end()) {
if(file == j->first) {
audiofiles.erase(j);
return;
}
j++;
}
}
void AudioExtractor::setOutputPrefix(const QString &p)
{
prefix = p;
}
void AudioExtractor::setExportPath(const QString &path)
{
exportpath = path;
}
void AudioExtractor::changeName(QString file, QString name)
{
AudioFileList::iterator j = audiofiles.begin();
while(j != audiofiles.end()) {
if(file == j->first) {
j->second = name;
return;
}
j++;
}
}
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