Adding Raven & VA dynamic BRIR auralization demo using DAFFv17 BRIR dataset (instead of HRIR)

applications/SoundFieldSimulation/Raven/dfRavenBinauralVA.m

+function [ data, samplerate, metadata ] = dfRavenBinauralVA( alpha, beta, rpf )
+
+    view = itaCoordinates( 1 );
+    view.phi = alpha;
+    view.theta_deg = 180 - beta;
+    view.r = 1.0;
+    
+    up = view;
+    up.theta = view.theta - pi/2;
+        
+    rpf.setReceiverViewVectors( ita_matlab2openGL( view.cart ) );
+    rpf.setReceiverUpVectors( ita_matlab2openGL( up.cart ) );
+
+    rpf.run();
+    brir = rpf.getBinauralImpulseResponseItaAudio;
+    
+    n_residual = mod( brir.nSamples, 4 );
+    data = [ brir.timeData', zeros( brir.nChannels, n_residual ) ];
+    
+    samplerate = brir.samplingRate;
+    metadata = [];
+end

applications/SoundFieldSimulation/Raven/ita_raven_demo_VABinauralDaffv17.m

+%% RAVEN head rotiation simulation & Auralization with VirtualAcoustics
+%
+% Author:   Henry Andrew / Lukas Aspck 
+% Contact:  las@akustik.rwth-aachen.de
+% date:     2019/06/19
+%
+% Example to simulate head rotation in a classroom and store it in a DAFF file
+% For auralization, use VA's binaural free field renderer and set the HRIR database 
+% to the simulated BRIR database 
+% 
+% If not available, get VirtualAcoustics on www.virtualacoustics.org
+%
+% <ITA-Toolbox>
+% This file is part of the application Raven for the ITA-Toolbox. All rights reserved.
+% You can find the license for this m-file in the application folder.
+% </ITA-Toolbox>
+
+%--------------------------------User Settings-----------------------------
+% Modify path if RAVEN was not installed in the default location
+ravenBasePath = 'D:\Users\stienen\dev\ITASuite\RAVEN\RavenProjects\TestShoeboxRoom\';
+
+raven_project_filename = [ ravenBasePath 'TestShoeboxRoom.rpf'];%'Shoebox_room.rpf'; %raven project file of room
+source_directivity_filename = [ ravenBasePath 'SourceDirectivity/Cardioid.v17.ms.daff'];  %path to raven database emtries
+receiver_directivity_filename = [ ravenBasePath 'HRTF\ITA_Artificial_Head_5x5_44kHz_192_win15_shifted90.v17.ir.daff'];
+out_file_prefix = 'TestShoebox';
+source_position = [7.0000    1.7000   -4.0000]; %NOTE, make sure these are inside the room!
+receiver_position = [3 1.7 -4]; %NOTE: in openGL coordinated (used by RAVEN) the "up/down" direction is the second element, and the third element is different from matlab coordinates by a factor of -1
+
+% NOTE: A simulation with azimuthResolution=3 and elevationResolution=45
+% takes about 20 minutes on a regular computer
+azimuthResolution=3; %in degrees. NOTE, small values here may result in large simulation times
+elevationResolution=45;
+simulate_room = true; %do simulation, or just load results from current workspace?
+automatic_rotate_sim = true; %set to true to automatically rotate the room, or false to manually rotate with a slider
+
+
+%% Create the Daff files to be used in auralisation
+
+%loads data from a raven project. Incudes lots of methods to calculate things/ extract data etc
+rpf = itaRavenProject(raven_project_filename);
+rpf.setModel([ ravenBasePath 'RoomModels\TestShoebox.ac']);
+
+DAFF17FileName = [out_file_prefix '_' num2str(azimuthResolution) 'x' num2str(elevationResolution) '.v17.ir.daff'];
+    
+if( simulate_room )
+    % ------------------------Load the raven project file----------------------
+    
+    rpf.setReceiverHRTF(receiver_directivity_filename); %load a HRTF for the receiver
+    rpf.setRadiusDetectionSphere(1.2);
+    rpf.setTimeSlotLength(15);
+    rpf.setNumParticles(10000);
+    rpf.setFixReflectionPattern(1);
+    rpf.setFixPoissonSequence(1);
+    rpf.setSourcePositions(source_position);
+    rpf.setSourceDirectivity(source_directivity_filename);
+    rpf.setSourceViewVectors([-1 0 0]);
+    rpf.setSourceUpVectors([0 1 0]);
+    rpf.setFilterLength(1100);
+    
+    
+    additional_metadata = daffv17_add_metadata( [], 'Web resource', 'String', 'http://www.opendaff.org' );
+    additional_metadata = daffv17_add_metadata( additional_metadata, 'DELAY_SAMPLES', 'Float', '0' );
+    
+    daffv17_write(  'filename', DAFF17FileName, ...
+        'content', 'IR', ...
+        'alphares', azimuthResolution, ...
+        'betares', elevationResolution, ...
+        'alpharange', [ 0 360 ], ...
+        'betarange', [ 0 180 ], ...
+        'channels', 2, ...
+        'metadata', additional_metadata, ...
+        'datafunc', @dfRavenBinauralVA, ...
+        'orient', [ 0 0 0 ], ...
+        'userdata', rpf );    
+    
+end
+
+%% Connect to VA server
+va = itaVA;
+
+va_connect( va ); %function called to automatically open VA and connect to it
+% va.connect( 'localhost' ) %connect to a va server which is already running
+
+%% Auralise simulated data
+va.reset()
+
+% Control output gain
+va.set_output_gain( 0.5 )
+
+% Add the current absolute folder path to VA application
+va.add_search_path( pwd );
+
+% Create a signal source and start playback
+X = va.create_signal_source_buffer_from_file( [ ravenBasePath '\RavenDatabase\SoundDatabase\Conga_ITA.wav']);
+va.set_signal_source_buffer_playback_action( X, 'play' )
+va.set_signal_source_buffer_looping( X, true );
+
+% Create a virtual sound source and set a position
+S = va.create_sound_source( 'itaVA_Source' );
+va.set_sound_source_position( S, [ 0 0 -1 ] ) % Note: This position is only important for the head rotation. Actual sound source position is encoded in the BRIRs
+
+% Create a listener with a HRTF and position him
+L = va.create_sound_receiver( 'itaVA_Listener' );
+va.set_sound_receiver_position( L, [ 0 0 0 ] )
+
+H = va.create_directivity( DAFF17FileName );
+
+va.set_sound_receiver_directivity( L, H );
+
+% Connect the signal source to the virtual sound source
+va.set_sound_source_signal_source( S, X )
+
+% More information
+disp( 'Type ''doc itaVA'' for more information.' )
+
+a = rpf.plotModelRoom;
+plot3(a, source_position(1), -source_position(3), source_position(2),'.r','MarkerSize',25);
+hold on
+plot3(a, [source_position(1),source_position(1)-1], [-source_position(3),-source_position(3)], [source_position(2),source_position(2)],'-r');
+plot3(a, receiver_position(1), -receiver_position(3), receiver_position(2), '.b','MarkerSize',25 );
+arrow = plot3(a, [receiver_position(1),receiver_position(1)+1], [-receiver_position(3),-receiver_position(3)], [receiver_position(2),receiver_position(2)],'-b');
+
+
+%---------------------------------plot look directions------------------------------
+if( automatic_rotate_sim )
+    for iAngle=0:5:360
+        %disp(['CurrentAngle: ' num2str(iAngle) ]);
+        
+        va.set_sound_receiver_orientation_view_up(L,[cosd(iAngle) 0 sind(iAngle)],[0 1 0]);
+        
+        rcvr_view_vector = receiver_position.*[1 1 -1] + [cosd(iAngle) 0 -sind(iAngle)];
+        arrow.XData = [receiver_position(1), rcvr_view_vector(1)];
+        arrow.YData = [-receiver_position(3), rcvr_view_vector(3)];
+        arrow.ZData = [receiver_position(2), rcvr_view_vector(2)];
+        drawnow
+        
+        pause(0.2);
+    end
+else
+    va_sliderAzimuth(va,L); %control the direction manually with an angle slider
+end
+
+
+
+%%
+function va_connect( va )
+VAbinaryPath=fileparts(which('VAServer.exe'));
+VAPath = VAbinaryPath(1:end-3);
+try
+    va.connect( 'localhost' )
+catch %open a VA server if not already open
+    %automatically open va server
+    system([ which('VAServer.exe') ' localhost:12340 ' fullfile( VAPath, 'conf') '\VACore.ini &'])
+    for i = 1:20 %try to connect for 20 seconds, then throw an error if sill cannot
+        try
+            pause(1) %give the server time to set up
+            va.connect( 'localhost' )
+            break
+        catch
+            if(i == 10)
+                error( 'Unable to Connect to VA Server' )
+            end
+        end
+        
+    end
+end
+end
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