luis@16: /*
luis@28:  * HumanEchoServlet
luis@16:  *
luis@16:  * Version information
luis@16:  *
luis@16:  * 3 December 2013
luis@16:  *
luis@16:  * Copyright notice
luis@16:  */
luis@15: 
luis@15: import java.util.Properties;
luis@15: import java.io.IOException;
luis@15: 
luis@28: import java.io.FileInputStream;
luis@28: import java.io.BufferedInputStream;
luis@28: import java.io.File;
luis@28: 
Chris@60: import java.nio.file.Files;
Chris@60: import java.nio.file.Path;
Chris@60: import java.nio.file.StandardCopyOption;
Chris@60: 
luis@21: import org.apache.log4j.Logger;
luis@16: 
luis@28: import javax.servlet.*;
luis@28: import javax.servlet.http.*;
luis@0: 
luis@0: import com.mathworks.toolbox.javabuilder.MWJavaObjectRef;
luis@0: import com.mathworks.toolbox.javabuilder.MWNumericArray;
luis@11: import com.mathworks.toolbox.javabuilder.MWStructArray;
luis@0: import com.mathworks.toolbox.javabuilder.MWException;
luis@15: import com.mathworks.toolbox.javabuilder.internal.MCRConfiguration;
luis@15: 
luis@15: import uk.ac.soton.isvr.*;
luis@0: 
luis@0: public class HumanEchoServlet extends HttpServlet {
Chris@54: 
luis@0:     private HumanEcho echo;
luis@28:     private static Logger logger = Logger.getLogger(HumanEchoServlet.class);
luis@0: 
Chris@54:     private String outdir = "";
Chris@54:     private String indir = "";
luis@16: 
Chris@60:     private static Integer dirId = 0;
Chris@60: 
luis@0:     public void init(ServletConfig config) throws ServletException {
luis@0:         super.init(config);
luis@0: 
Chris@51: 	logger.info("In init");
Chris@42: 
Chris@51: 	logger.info("java.library.path is " + 
Chris@42: 		     System.getProperty("java.library.path"));
Chris@42: 
luis@15:         try {
luis@15:             Properties properties = new Properties();
Chris@42:             properties.load
Chris@42: 		(Thread.currentThread().getContextClassLoader().
Chris@51: 		 getResourceAsStream("HumanEcho.properties"));
luis@15: 
Chris@54:             outdir = properties.getProperty("outdir");
Chris@54:             indir = properties.getProperty("indir");
luis@15: 
Chris@54: 	    logger.info("WAV file directory is " + outdir);
Chris@42: 
Chris@51:         } catch (Exception e) {
Chris@51: 	    logger.error("Failed to load app properties: " + e.getMessage());
luis@15:             e.printStackTrace();
luis@15:         }
luis@15: 
luis@0:         try {
Chris@42: 	    // Test that we can construct one of the MATLAB objects
Chris@42: 	    
Chris@42: 	    long before = System.currentTimeMillis();
luis@0:             echo = new HumanEcho();
Chris@42: 	    long after = System.currentTimeMillis();
Chris@51: 	    logger.info("Created a HumanEcho object: it took " + (after - before) + " ms");
Chris@42:         } catch (MWException e) {
Chris@51: 	    logger.error("Failed to construct HumanEcho object: " + e.getMessage());
luis@0:             e.printStackTrace();
luis@0:         }
Chris@51: 
Chris@51: 	logger.info("Init completed");
luis@0:     }
luis@0: 
luis@0:     public void destroy() {
luis@0:         super.destroy();
luis@0: 
Chris@42:         if (echo != null) {
luis@0:             echo.dispose();
luis@0:         }
luis@0:     }
luis@0: 
Chris@60:     protected synchronized String getDirToken() {
Chris@60: 	dirId = dirId + 1;
Chris@60: 	return dirId.toString();
Chris@60:     }
Chris@60: 
luis@11:     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
luis@0: 
Chris@51: 	logger.info("In doGet");
Chris@47: 
Chris@54:         logger.info("Distance (as string) is: " + request.getParameter("dist"));
Chris@54: 
luis@11:         // todo: validate/normalise distance
Chris@54:         Double dist = Double.parseDouble(request.getParameter("dist"));
Chris@60: 	Double azim = Double.parseDouble(request.getParameter("azim"));
Chris@60: 	String orientation = request.getParameter("orient");
Chris@60: 	Double dirweight = Double.parseDouble(request.getParameter("dirweight"));
luis@38: 
Chris@60: 	logger.info("Got parameters");
luis@38: 
luis@11:         MWStructArray Input = null;
luis@0: 
luis@28:         String outputfname = new String();
luis@28: 
Chris@60: 	// this needs to be distinct for the parameters
Chris@60: 	StringBuilder sb = new StringBuilder();
Chris@42: 
Chris@60: 	sb.append("e_d");
Chris@60: 	sb.append(dist);
Chris@60: 	sb.append("_a");
Chris@60: 	sb.append(azim);
luis@16: 
Chris@60: 	if (orientation.equals("horz")) {
Chris@60: 	    sb.append("_H");
Chris@60: 	} else if (orientation.equals("angled")) {
Chris@60: 	    sb.append("_A");
Chris@60: 	}
luis@0: 
Chris@60: 	sb.append("_w");
Chris@60: 	sb.append(dirweight);
Chris@47: 
Chris@60: 	outputfname = sb.toString();
Chris@46: 
Chris@62: 	String target = outdir + File.separator + outputfname + ".wav";
Chris@60: 	File targetFile = new File(target);
Chris@60: 	targetFile.deleteOnExit();
luis@11: 
Chris@60: 	if (!targetFile.exists()) {
luis@11: 
Chris@60: 	    try {
Chris@60: 		logger.info("Property catalina.base is " + System.getProperty("catalina.base"));
Chris@60: 
Chris@62: 		String tempDir = outdir + File.separator + getDirToken();
Chris@60: 		File tempDirFilePath = new File(tempDir);
Chris@60: 		tempDirFilePath.mkdirs();
Chris@60: 
Chris@60: 		// Matlab structure:
Chris@60: 		// 
Chris@60: 		// Input = struct('dist', 0.9, 'azim', 0, 'orient',
Chris@60: 		// 'horz', 'dirweight', 0.2, 'outdir', '/tmp/wav',
Chris@60: 		// 'outname', 'foo.wav', 'indir', '/path/to/hrir')
Chris@60: 
Chris@60: 		String[] InputStructFields = {
Chris@60: 		    "dist", "azim", "orient", "dirweight",
Chris@60: 		    "outdir", "outname", "indir" 
Chris@60: 		};
Chris@60: 
Chris@60: 		Input = new MWStructArray(1, 1, InputStructFields);
Chris@60: 		Input.set("dist", 1, Double.valueOf(dist));
Chris@60: 		Input.set("azim", 1, Double.valueOf(azim));
Chris@60: 		Input.set("orient", 1, orientation);
Chris@60: 		Input.set("dirweight", 1, Double.valueOf(dirweight));
Chris@60: 		Input.set("outdir", 1, tempDir);
Chris@60: 		Input.set("indir", 1, indir);
Chris@60: 
Chris@60: 		Input.set("outname", 1, outputfname);
Chris@60: 
Chris@60: 		Object[] result = echo.simulateBinauralSignals(Input);
Chris@60: 
Chris@62: 		File createdFile = new File(tempDir + File.separator + outputfname + ".wav");
Chris@60: 		if (!createdFile.exists()) {
Chris@60: 		    String err = "The simulateBinauralSignals call failed to create expected output file \"" + createdFile + "\"";
Chris@60: 		    logger.error(err);
Chris@60: 		    throw new ServletException(err);
Chris@60: 		}
Chris@60: 
Chris@60: 		Files.move(createdFile.toPath(),
Chris@60: 			   targetFile.toPath(),
Chris@60: 			   StandardCopyOption.ATOMIC_MOVE);
Chris@60: 
Chris@60: 		tempDirFilePath.delete();
Chris@60: 
Chris@60: 	    } catch (MWException e) {
Chris@60: 		logger.error("Failed to calculate simulateBinauralSignals: " + e.getMessage());
Chris@60: 		e.printStackTrace();
Chris@60: 		throw new ServletException(e.getMessage());
Chris@60: 	    }
Chris@60: 	}
luis@0: 
luis@28:         // Creating the stream
luis@28:         ServletOutputStream stream = null;
luis@28:         BufferedInputStream buf = null;
luis@28: 
luis@28:         try{
luis@28:             stream = response.getOutputStream();
Chris@54: 
Chris@60: 	    logger.info("About to read WAV data from \"" + target + "\"");
luis@28: 
luis@28:             //set response headers
luis@32:             response.setContentType("audio/x-wav");
Chris@67:             response.addHeader("Content-Disposition","attachment; filename=" + outputfname + ".wav");
Chris@60:             response.setContentLength( (int) targetFile.length( ) );
luis@28: 
Chris@60:             FileInputStream input = new FileInputStream(targetFile);
luis@28:             buf = new BufferedInputStream(input);
luis@28: 
Chris@54:             int b = 0;
Chris@54: 	    int total = 0;
Chris@54: 
Chris@54:             // read from the file; write to the ServletOutputStream
Chris@54:             while ((b = buf.read()) != -1) {
Chris@54:                 stream.write(b);
Chris@54: 		total += 1;
Chris@54: 	    }
Chris@54: 
Chris@54: 	    logger.info("Successfully wrote " + total + " byte(s) to client");
luis@28: 
luis@28:         } catch (IOException ioe){
Chris@51: 	    logger.error("Failed to read wav data: " + ioe.getMessage());
luis@28:             throw new ServletException(ioe.getMessage( ));
luis@28:         } finally {
Chris@54:             if (stream != null) stream.close();
Chris@54:             if (buf != null) buf.close();
Chris@54: 	}
luis@0:     }
luis@0: }