From cb7ec4965e6ec3d2142522c5c110b240f800e55d Mon Sep 17 00:00:00 2001
From: Comment <tim@gray.(none)>
Date: Mon, 20 May 2013 08:55:30 +0100
Subject: vamp wrapper begun

---
 vamphost/src/ofxVamphost.cpp | 212 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 212 insertions(+)
 create mode 100644 vamphost/src/ofxVamphost.cpp

(limited to 'vamphost/src/ofxVamphost.cpp')

diff --git a/vamphost/src/ofxVamphost.cpp b/vamphost/src/ofxVamphost.cpp
new file mode 100644
index 0000000..3da842b
--- /dev/null
+++ b/vamphost/src/ofxVamphost.cpp
@@ -0,0 +1,212 @@
+#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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