[seiscomp, scanloc] Install, add .gitignore

include/seiscomp/io/recordstream/decimation.h

@@ -0,0 +1,166 @@
+/***************************************************************************
+ * Copyright (C) gempa GmbH                                                *
+ * All rights reserved.                                                    *
+ * Contact: gempa GmbH (seiscomp-dev@gempa.de)                             *
+ *                                                                         *
+ * GNU Affero General Public License Usage                                 *
+ * This file may be used under the terms of the GNU Affero                 *
+ * Public License version 3.0 as published by the Free Software Foundation *
+ * and appearing in the file LICENSE included in the packaging of this     *
+ * file. Please review the following information to ensure the GNU Affero  *
+ * Public License version 3.0 requirements will be met:                    *
+ * https://www.gnu.org/licenses/agpl-3.0.html.                             *
+ *                                                                         *
+ * Other Usage                                                             *
+ * Alternatively, this file may be used in accordance with the terms and   *
+ * conditions contained in a signed written agreement between you and      *
+ * gempa GmbH.                                                             *
+ ***************************************************************************/
+
+
+#ifndef SEISCOMP_RECORDSTREAM_DECIMATION_H
+#define SEISCOMP_RECORDSTREAM_DECIMATION_H
+
+#include <sstream>
+#include <map>
+
+#include <seiscomp/core/genericrecord.h>
+#include <seiscomp/io/recordstream.h>
+#include <seiscomp/core.h>
+
+namespace Seiscomp {
+namespace RecordStream {
+
+DEFINE_SMARTPOINTER(Decimation);
+
+class SC_SYSTEM_CORE_API Decimation : public Seiscomp::IO::RecordStream {
+	// ----------------------------------------------------------------------
+	//  Xstruction
+	// ----------------------------------------------------------------------
+	public:
+		Decimation();
+		virtual ~Decimation();
+
+
+	// ----------------------------------------------------------------------
+	//  Public Interface
+	// ----------------------------------------------------------------------
+	public:
+		virtual bool setSource(const std::string &source);
+		virtual bool setRecordType(const char *type);
+
+		virtual bool addStream(const std::string &networkCode,
+		                       const std::string &stationCode,
+		                       const std::string &locationCode,
+		                       const std::string &channelCode);
+
+		virtual bool addStream(const std::string &networkCode,
+		                       const std::string &stationCode,
+		                       const std::string &locationCode,
+		                       const std::string &channelCode,
+		                       const Seiscomp::Core::Time &stime,
+		                       const Seiscomp::Core::Time &etime);
+
+		virtual bool setStartTime(const Seiscomp::Core::Time &stime);
+		virtual bool setEndTime(const Seiscomp::Core::Time &etime);
+		virtual bool setTimeWindow(const Seiscomp::Core::TimeWindow &w);
+
+		virtual bool setTimeout(int seconds);
+
+		virtual void close();
+
+		virtual Record *next();
+
+
+	// ----------------------------------------------------------------------
+	//  Private Interface
+	// ----------------------------------------------------------------------
+	private:
+		void cleanup();
+
+		int checkSR(Record *rec) const;
+
+		bool push(Record *rec);
+		GenericRecord *convert(Record *rec);
+
+
+	// ----------------------------------------------------------------------
+	//  Implementation
+	// ----------------------------------------------------------------------
+	private:
+		typedef std::vector<double> Coefficients;
+
+		struct ResampleStage {
+			ResampleStage() : nextStage(nullptr) {}
+			~ResampleStage() { if ( nextStage ) delete nextStage; }
+
+			double targetRate;
+
+			// Fixed source sample rate derived from the first record
+			// received.
+			double sampleRate;
+			double dt;
+
+			// Flag that indicates that a streams is passed through
+			// without resampling.
+			bool passThrough;
+
+			bool valid;
+
+			int N;
+			int N2;
+			size_t samplesToSkip;
+
+			Coefficients *coefficients;
+
+			// The ring buffer that holds the last samples for downsampling.
+			std::vector<double> buffer;
+
+			// The number of samples still missing in the buffer before
+			// filtering can be done
+			size_t missingSamples;
+
+			// The front index of the ring buffer
+			size_t front;
+
+			// Time of front of ring buffer
+			Core::Time startTime;
+
+			// End time of last record
+			Core::Time lastEndTime;
+
+			ResampleStage *nextStage;
+
+			void reset() {
+				missingSamples = buffer.size();
+				front = 0;
+				samplesToSkip = 0;
+				startTime = Core::Time();
+				lastEndTime = Core::Time();
+
+				if ( nextStage ) nextStage->reset();
+			}
+		};
+
+		typedef std::map<int, Coefficients*> CoefficientMap;
+		typedef std::map<std::string, ResampleStage*> StreamMap;
+
+		void init(ResampleStage *stage, Record *rec);
+		bool initCoefficients(ResampleStage *stage);
+		GenericRecord *resample(ResampleStage *stage, Record *rec);
+
+		IO::RecordStreamPtr _source;
+		double              _targetRate;
+		double              _fp;
+		double              _fs;
+		int                 _maxN;
+		int                 _coeffScale;
+		StreamMap           _streams;
+		CoefficientMap      _coefficients;
+		GenericRecord      *_nextRecord;
+};
+
+}
+}
+
+#endif