diff runner/MIDIFeatureWriter.cpp @ 143:ad425b9096bd

Merge from branch 'midi'

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/runner/MIDIFeatureWriter.cpp	Mon Oct 13 13:53:09 2014 +0100
@@ -0,0 +1,156 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Annotator
+    A utility for batch feature extraction from audio files.
+    Mark Levy, Chris Sutton and Chris Cannam, Queen Mary, University of London.
+    Copyright 2007-2014 QMUL.
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#include "MIDIFeatureWriter.h"
+
+using namespace std;
+using Vamp::Plugin;
+using Vamp::PluginBase;
+
+#include "base/Exceptions.h"
+#include "data/fileio/MIDIFileWriter.h"
+
+MIDIFeatureWriter::MIDIFeatureWriter() :
+    FileFeatureWriter(SupportOneFilePerTrackTransform |
+                      SupportOneFilePerTrack |
+                      SupportOneFileTotal,
+                      "mid")
+{
+}
+
+MIDIFeatureWriter::~MIDIFeatureWriter()
+{
+}
+
+MIDIFeatureWriter::ParameterList
+MIDIFeatureWriter::getSupportedParameters() const
+{
+    ParameterList pl = FileFeatureWriter::getSupportedParameters();
+    return pl;
+}
+
+void
+MIDIFeatureWriter::setParameters(map<string, string> &params)
+{
+    FileFeatureWriter::setParameters(params);
+}
+
+void
+MIDIFeatureWriter::setTrackMetadata(QString, TrackMetadata)
+{
+    cerr << "MIDIFeatureWriter::setTrackMetadata: not supported (yet?)" << endl;
+}
+
+void
+MIDIFeatureWriter::write(QString trackId,
+			 const Transform &transform,
+			 const Plugin::OutputDescriptor& output,
+			 const Plugin::FeatureList& features,
+			 std::string /* summaryType */)
+{
+    QString transformId = transform.getIdentifier();
+
+    QString filename = getOutputFilename(trackId, transformId);
+    if (filename == "") {
+	throw FailedToOpenOutputStream(trackId, transformId);
+    }
+
+    int sampleRate = transform.getSampleRate();
+
+    if (m_rates.find(filename) == m_rates.end()) {
+        m_rates[filename] = sampleRate;
+    }
+
+    if (m_fileTransforms[filename].find(transformId) == 
+        m_fileTransforms[filename].end()) {
+
+        // This transform is new to the file, give it a channel number
+
+        int channel = m_nextChannels[filename];
+        m_nextChannels[filename] = channel + 1;
+
+        m_fileTransforms[filename].insert(transformId);
+        m_channels[transformId] = channel;
+    }
+
+    NoteList notes = m_notes[filename];
+
+    bool freq = (output.unit == "Hz" || 
+                 output.unit == "hz" || 
+                 output.unit == "HZ");
+
+    for (int i = 0; i < (int)features.size(); ++i) {
+
+        const Plugin::Feature &feature(features[i]);
+
+        Vamp::RealTime timestamp = feature.timestamp;
+        int frame = Vamp::RealTime::realTime2Frame(timestamp, sampleRate);
+
+        int duration = 1;
+        if (feature.hasDuration) {
+            duration = Vamp::RealTime::realTime2Frame(feature.duration, sampleRate);
+        }
+        
+        int pitch = 60;
+        if (feature.values.size() > 0) {
+            float pval = feature.values[0];
+            if (freq) {
+                pitch = Pitch::getPitchForFrequency(pval);
+            } else {
+                pitch = int(pval + 0.5);
+            }
+        }
+
+        int velocity = 100;
+        if (feature.values.size() > 1) {
+            float vval = feature.values[1];
+            if (vval < 128) {
+                velocity = int(vval + 0.5);
+            }
+        }
+
+        NoteData note(frame, duration, pitch, velocity);
+
+        note.channel = m_channels[transformId];
+
+        notes.push_back(note);
+    }
+
+    m_notes[filename] = notes;
+}
+
+void
+MIDIFeatureWriter::finish()
+{
+    for (NoteMap::const_iterator i = m_notes.begin(); i != m_notes.end(); ++i) {
+
+	QString filename = i->first;
+	NoteList notes = i->second;
+	float rate = m_rates[filename];
+
+	TrivialNoteExportable exportable(notes);
+
+	{
+	    MIDIFileWriter writer(filename, &exportable, rate);
+	    if (!writer.isOK()) {
+		cerr << "ERROR: Failed to create MIDI writer: " 
+		     << writer.getError() << endl;
+		throw FileOperationFailed(filename, "create MIDI writer");
+	    }
+	    writer.write();
+	}
+    }
+}
+