Chris@137: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@137: 
Chris@137: /*
Chris@137:     Sonic Annotator
Chris@137:     A utility for batch feature extraction from audio files.
Chris@137:     Mark Levy, Chris Sutton and Chris Cannam, Queen Mary, University of London.
Chris@137:     Copyright 2007-2014 QMUL.
Chris@137: 
Chris@137:     This program is free software; you can redistribute it and/or
Chris@137:     modify it under the terms of the GNU General Public License as
Chris@137:     published by the Free Software Foundation; either version 2 of the
Chris@137:     License, or (at your option) any later version.  See the file
Chris@137:     COPYING included with this distribution for more information.
Chris@137: */
Chris@137: 
Chris@137: #include "MIDIFeatureWriter.h"
Chris@137: 
Chris@137: using namespace std;
Chris@137: using Vamp::Plugin;
Chris@137: using Vamp::PluginBase;
Chris@137: 
Chris@137: #include "base/Exceptions.h"
Chris@137: #include "data/fileio/MIDIFileWriter.h"
Chris@137: 
Chris@137: MIDIFeatureWriter::MIDIFeatureWriter() :
Chris@137:     FileFeatureWriter(SupportOneFilePerTrackTransform |
Chris@137:                       SupportOneFilePerTrack |
Chris@137:                       SupportOneFileTotal,
Chris@137:                       "mid")
Chris@137: {
Chris@137: }
Chris@137: 
Chris@137: MIDIFeatureWriter::~MIDIFeatureWriter()
Chris@137: {
Chris@137: }
Chris@137: 
Chris@144: string
Chris@144: MIDIFeatureWriter::getDescription() const
Chris@144: {
Chris@144:     return "Write features to MIDI files. All features are written as MIDI notes. If a feature has at least one value, its first value will be used as the note pitch, the second value (if present) for velocity. If a feature has units of Hz, then its pitch will be converted from frequency to an integer value in MIDI range, otherwise it will be written directly. Multiple (up to 16) transforms can be written to a single MIDI file, where they will be given separate MIDI channel numbers.";
Chris@144: }
Chris@144: 
Chris@137: MIDIFeatureWriter::ParameterList
Chris@137: MIDIFeatureWriter::getSupportedParameters() const
Chris@137: {
Chris@137:     ParameterList pl = FileFeatureWriter::getSupportedParameters();
Chris@137:     return pl;
Chris@137: }
Chris@137: 
Chris@137: void
Chris@137: MIDIFeatureWriter::setParameters(map<string, string> &params)
Chris@137: {
Chris@137:     FileFeatureWriter::setParameters(params);
Chris@137: }
Chris@137: 
Chris@137: void
Chris@137: MIDIFeatureWriter::setTrackMetadata(QString, TrackMetadata)
Chris@137: {
Chris@137:     cerr << "MIDIFeatureWriter::setTrackMetadata: not supported (yet?)" << endl;
Chris@137: }
Chris@137: 
Chris@137: void
Chris@137: MIDIFeatureWriter::write(QString trackId,
Chris@137: 			 const Transform &transform,
Chris@137: 			 const Plugin::OutputDescriptor& output,
Chris@137: 			 const Plugin::FeatureList& features,
Chris@141: 			 std::string /* summaryType */)
Chris@137: {
Chris@140:     QString transformId = transform.getIdentifier();
Chris@140: 
Chris@140:     QString filename = getOutputFilename(trackId, transformId);
Chris@137:     if (filename == "") {
Chris@140: 	throw FailedToOpenOutputStream(trackId, transformId);
Chris@137:     }
Chris@137: 
Chris@141:     int sampleRate = transform.getSampleRate();
Chris@141: 
Chris@140:     if (m_rates.find(filename) == m_rates.end()) {
Chris@140:         m_rates[filename] = sampleRate;
Chris@140:     }
Chris@140: 
Chris@140:     if (m_fileTransforms[filename].find(transformId) == 
Chris@140:         m_fileTransforms[filename].end()) {
Chris@140: 
Chris@140:         // This transform is new to the file, give it a channel number
Chris@140: 
Chris@140:         int channel = m_nextChannels[filename];
Chris@140:         m_nextChannels[filename] = channel + 1;
Chris@140: 
Chris@140:         m_fileTransforms[filename].insert(transformId);
Chris@140:         m_channels[transformId] = channel;
Chris@140:     }
Chris@140: 
Chris@140:     NoteList notes = m_notes[filename];
Chris@140: 
Chris@141:     bool freq = (output.unit == "Hz" || 
Chris@141:                  output.unit == "hz" || 
Chris@141:                  output.unit == "HZ");
Chris@141: 
Chris@141:     for (int i = 0; i < (int)features.size(); ++i) {
Chris@141: 
Chris@141:         const Plugin::Feature &feature(features[i]);
Chris@141: 
Chris@141:         Vamp::RealTime timestamp = feature.timestamp;
Chris@141:         int frame = Vamp::RealTime::realTime2Frame(timestamp, sampleRate);
Chris@141: 
Chris@141:         int duration = 1;
Chris@141:         if (feature.hasDuration) {
Chris@141:             duration = Vamp::RealTime::realTime2Frame(feature.duration, sampleRate);
Chris@141:         }
Chris@141:         
Chris@141:         int pitch = 60;
Chris@141:         if (feature.values.size() > 0) {
Chris@141:             float pval = feature.values[0];
Chris@141:             if (freq) {
Chris@141:                 pitch = Pitch::getPitchForFrequency(pval);
Chris@141:             } else {
Chris@141:                 pitch = int(pval + 0.5);
Chris@141:             }
Chris@141:         }
Chris@141: 
Chris@141:         int velocity = 100;
Chris@141:         if (feature.values.size() > 1) {
Chris@141:             float vval = feature.values[1];
Chris@141:             if (vval < 128) {
Chris@141:                 velocity = int(vval + 0.5);
Chris@141:             }
Chris@141:         }
Chris@141: 
Chris@141:         NoteData note(frame, duration, pitch, velocity);
Chris@141: 
Chris@141:         note.channel = m_channels[transformId];
Chris@141: 
Chris@141:         notes.push_back(note);
Chris@141:     }
Chris@140: 
Chris@140:     m_notes[filename] = notes;
Chris@137: }
Chris@137: 
Chris@137: void
Chris@137: MIDIFeatureWriter::finish()
Chris@137: {
Chris@137:     for (NoteMap::const_iterator i = m_notes.begin(); i != m_notes.end(); ++i) {
Chris@137: 
Chris@137: 	QString filename = i->first;
Chris@137: 	NoteList notes = i->second;
Chris@137: 	float rate = m_rates[filename];
Chris@137: 
Chris@137: 	TrivialNoteExportable exportable(notes);
Chris@137: 
Chris@137: 	{
Chris@137: 	    MIDIFileWriter writer(filename, &exportable, rate);
Chris@137: 	    if (!writer.isOK()) {
Chris@137: 		cerr << "ERROR: Failed to create MIDI writer: " 
Chris@137: 		     << writer.getError() << endl;
Chris@137: 		throw FileOperationFailed(filename, "create MIDI writer");
Chris@137: 	    }
Chris@137: 	    writer.write();
Chris@137: 	}
Chris@137:     }
Chris@137: }
Chris@137: