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#include "ofxVamphost.h"
using namespace std;
bool Vamphost::init(const string &soname,const string &id,const int &_channels,const int &_bits,const int &_samples,const int &_rate,const int &_outputNo,const string &_output){
//stuff that only happens once
channels =_channels;
samples=_samples;
rate=_rate;
bits=_bits;
outputNo=_outputNo;
output=_output;
//http://www.mega-nerd.com/libsndfile/api.html#note1
//libsndfile returns -1..1 for fp data
bytes=(bits>>3);
stride=channels*bytes;
scale=(1.0f/pow(2.0f,bits));
features[0.0f]=0;
loader = PluginLoader::getInstance();
key = loader->composePluginKey(soname, id);
plugin = loader->loadPlugin(key, _rate, PluginLoader::ADAPT_ALL_SAFE);
if (!plugin) {
cerr << ": ERROR: Failed to load plugin \"" << id
<< "\" from library \"" << soname << "\"" << endl;
return false;
}
cerr << "Running plugin: \"" << plugin->getIdentifier() << "\"..." << endl;
blockSize = plugin->getPreferredBlockSize();
stepSize = plugin->getPreferredStepSize();
if (blockSize == 0) {
blockSize = 1024;
}
if (stepSize == 0) {
if (plugin->getInputDomain() == Plugin::FrequencyDomain) {
stepSize = blockSize/2;
} else {
stepSize = blockSize;
}
}
else if (stepSize > blockSize) {
cerr << "WARNING: stepSize " << stepSize << " > blockSize " << blockSize << ", resetting blockSize to ";
if (plugin->getInputDomain() == Plugin::FrequencyDomain) {
blockSize = stepSize * 2;
} else {
blockSize = stepSize;
}
cerr << blockSize << endl;
}
overlapSize = blockSize - stepSize;
currentStep = 0;
finalStepsRemaining = max(1, (blockSize / stepSize) - 1); // at end of file, this many part-silent frames needed after we hit EOF
plugbuf = new float*[channels];
for (int c = 0; c < channels; ++c) plugbuf[c] = new float[blockSize + 2];
cerr << "Using block size = " << blockSize << ", step size = "
<< stepSize << endl;
// The channel queries here are for informational purposes only --
// a PluginChannelAdapter is being used automatically behind the
// scenes, and it will take case of any channel mismatch
int minch = plugin->getMinChannelCount();
int maxch = plugin->getMaxChannelCount();
cerr << "Plugin accepts " << minch << " -> " << maxch << " channel(s)" << endl;
cerr << "Sound file has " << channels << " (will mix/augment if necessary)" << endl;
Plugin::OutputList outputs = plugin->getOutputDescriptors();
Plugin::OutputDescriptor od;
int returnValue = 1;
int prog = 0;
RealTime rt;
PluginWrapper *wrapper = 0;
RealTime adjustment = RealTime::zeroTime;
if (outputs.empty()) {
cerr << "ERROR: Plugin has no outputs!" << endl;
return false;
}
if (outputNo < 0) {
for (size_t oi = 0; oi < outputs.size(); ++oi) {
if (outputs[oi].identifier == output) {
outputNo = oi;
break;
}
}
if (outputNo < 0) {
cerr << "ERROR: Non-existent output \"" << output << "\" requested" << endl;
return false;
}
}
else {
if (int(outputs.size()) <= outputNo) {
cerr << "ERROR: Output " << outputNo << " requested, but plugin has only " << outputs.size() << " output(s)" << endl;
return false;
}
}
od = outputs[outputNo];
cerr << "Output is: \"" << od.identifier << "\"" << endl;
if (!plugin->initialise(channels, stepSize, blockSize)) {
cerr << "ERROR: Plugin initialise (channels = " << channels
<< ", stepSize = " << stepSize << ", blockSize = "
<< blockSize << ") failed." << endl;
return false;
}
wrapper = dynamic_cast<PluginWrapper *>(plugin);
if (wrapper) {
// See documentation for
// PluginInputDomainAdapter::getTimestampAdjustment
PluginInputDomainAdapter *ida =wrapper->getWrapper<PluginInputDomainAdapter>();
if (ida) adjustment = ida->getTimestampAdjustment();
}
//everything is prepared to start consuming data in blocks
in_block=0;
blocks_processed=0;
currentStep=0;
featureNo=1;
return true;
}
void Vamphost::process_frame(unsigned char *data,int samples_in_frame){
int sample=0;
//process the whole frame which may be f>1<f blocks
//when the frame is finished leave the partial block for the next frame
while(sample<samples_in_frame) {
while(sample<samples_in_frame&&in_block<blockSize) {
for (int i=0;i<channels;i++) {
unsigned int this_val=0;
for (int j=0;j<bytes;j++) {
this_val+=data[(sample*stride)+(i*bytes)+j]<<(j*8);
}
plugbuf[i][in_block]=((float)((short)this_val))*scale;
}
in_block++;
sample++;
}
if (in_block==blockSize) {
//block is ready to be processed
//cerr<<plugin->getIdentifier()<<" processed block "<<blocks_processed<<endl;
//I /think/ that the vamp plugin keeps processing through the plugbuf until it encounters 0s
rt = RealTime::frame2RealTime(currentStep * stepSize, rate);
Plugin::FeatureSet feat=plugin->process(plugbuf, rt);
for (unsigned int i = 0; i < feat[outputNo].size(); ++i) {
features[((float)feat[outputNo][i].timestamp.sec)+(((float)feat[outputNo][i].timestamp.nsec)*.000000001)]=featureNo;
featureNo++;
}
//shunt it down
for (int i=0;i<blockSize-stepSize;i++){
for (int j=0;j<channels;j++){
plugbuf[j][i]=plugbuf[j][i+stepSize];
}
}
in_block-=stepSize;
currentStep++;
}
}
}
void Vamphost::cleanup(){
//process final block
while(in_block<blockSize) {
for (int i=0;i<channels;i++) {
plugbuf[i][in_block]=0.0f;
}
in_block++;
}
rt = RealTime::frame2RealTime(currentStep * stepSize, rate);
Plugin::FeatureSet feat=plugin->process(plugbuf, rt);
for (unsigned int i = 0; i < feat[outputNo].size(); ++i) {
features[((float)feat[outputNo][i].timestamp.sec)+(((float)feat[outputNo][i].timestamp.nsec)*.000000001)]=featureNo;
featureNo++;
}
feat=plugin->getRemainingFeatures();
for (unsigned int i = 0; i < feat[outputNo].size(); ++i) {
features[((float)feat[outputNo][i].timestamp.sec)+(((float)feat[outputNo][i].timestamp.nsec)*.000000001)]=featureNo;
featureNo++;
}
cerr<<plugin->getIdentifier()<<" found "<<(features.size()-1)<<" features"<<endl;
//deal with left over data?
for (int c = 0; c < channels; ++c) {
delete[] plugbuf[c];
}
delete[] plugbuf;
delete plugin;
}
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