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audioManager.m
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audioManager.m
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classdef audioManager < optickaCore
% AUDIOMANAGER Connects and manages audio playback, set as global aM from runExperiment.runTask()
properties
device = []
fileName char = ''
numChannels double = 2
frequency double = 44100
lowLatency logical = false
latencyLevel = 1
%> this allows us to be used even if no sound is attached
silentMode logical = false
%> chain snd() function to use psychportaudio?
chainSnd = false
verbose = true
end
properties (SetAccess = private, GetAccess = public)
aHandle
devices
status
isBuffered logical = false
fileNames cell = {};
isSetup logical = false
isOpen logical = false
isSample logical = false
end
properties (SetAccess = private, GetAccess = private)
handles = []
isFiles logical = false
allowedProperties = {'numChannels', 'frequency', 'lowLatency', ...
'device', 'fileName', 'silentMode', 'verbose'}
end
%=======================================================================
methods %------------------PUBLIC METHODS--------------%
%=======================================================================
%==============CONSTRUCTOR============%
function me = audioManager(varargin)
args = optickaCore.addDefaults(varargin,struct('name','audio-manager'));
me=me@optickaCore(args); %we call the superclass constructor first
me.parseArgs(args, me.allowedProperties);
isValid = checkFiles(me);
if ~isValid
me.salutation('constructor','Please ensure valid file/dir name');
end
if ~isempty(me.device) && me.device < 0; me.silentMode = true; end
try
PsychPortAudio('Close');
InitializePsychSound(me.lowLatency);
me.devices = PsychPortAudio('GetDevices');
catch
warning('audioManager: Could not initialise audio devices!!!')
end
me.salutation('constructor','Audio Manager initialisation complete');
end
% ===================================================================
%> @brief open
%>
% ===================================================================
function open(me)
if me.silentMode || me.isOpen; return; end
setup(me);
end
% ===================================================================
%> @brief setup
%>
% ===================================================================
function setup(me)
if ~isempty(me.device) && me.device < 0; me.silentMode = true; end
if me.silentMode || me.isOpen; return; end
isValid = checkFiles(me);
if ~isValid
warning('NO valid file/dir name');
end
InitializePsychSound(me.lowLatency);
try PsychPortAudio('Close'); end
me.devices = PsychPortAudio('GetDevices');
if me.device > length(me.devices)
fprintf('You have specified a non-existant device, trying first available device!\n');
me.device = me.devices(1).DeviceIndex;
fprintf('Using device %i: %s\n',me.device,me.devices(1).DeviceName);
end
try
PsychPortAudio('Close');
if isempty(me.aHandle)
% PsychPortAudio('Open' [, deviceid][, mode][, reqlatencyclass][, freq]
% [, channels][, buffersize][, suggestedLatency][, selectchannels]
% [, specialFlags=0]);
me.aHandle = PsychPortAudio('Open', me.device, 1, me.latencyLevel);
end
if me.chainSnd
Snd('Open',me.aHandle); % chain Snd() to this instance
end
PsychPortAudio('Volume', me.aHandle, 1);
me.status = PsychPortAudio('GetStatus', me.aHandle);
me.frequency = me.status.SampleRate;
me.silentMode = false;
me.isSetup = true;
me.isOpen = true;
catch
me.reset();
warning('--->audioManager: setup failed, going into silent mode, note you will have no sound!')
me.silentMode = true;
end
end
% ===================================================================
%> @brief setup
%>
% ===================================================================
function loadSamples(me)
if me.silentMode; return; end
if me.isFiles
%TODO
else
[audiodata, ~] = psychwavread(me.fileName);
end
PsychPortAudio('FillBuffer', me.aHandle, audiodata');
me.isSample = true;
end
% ===================================================================
%> @brief
%>
% ===================================================================
function play(me, when)
if me.silentMode; return; end
if ~exist('when','var'); when = []; end
if ~me.isSetup; setup(me);end
if ~me.isSample; loadSamples(me);end
if me.isSetup && me.isSample
PsychPortAudio('Start', me.aHandle, [], when);
end
end
% ===================================================================
%> @brief
%>
% ===================================================================
function waitUntilStopped(me)
if me.silentMode; return; end
if me.isSetup
PsychPortAudio('Stop', me.aHandle, 1, 1);
end
end
% ===================================================================
%> @brief
%>
% ===================================================================
function beep(me,freq,durationSec,fVolume)
if me.silentMode
if me.verbose;me.logOutput('beep','SilentMode Beep',true);end
return;
end
if ~me.isSetup; setup(me);end
if ~exist('freq', 'var');freq = 1000;end
if isnumeric(freq) && length(freq) == 3; fVolume = freq(3); durationSec=freq(2); freq = freq(1); end
if ~exist('durationSec', 'var');durationSec = 0.15; end
if ~exist('fVolume', 'var'); fVolume = 0.5;
else
% Clamp if necessary
if (fVolume > 1.0)
fVolume = 1.0;
elseif (fVolume < 0)
fVolume = 0;
end
end
if ischar(freq)
if strcmpi(freq, 'high'); freq = 1000;
elseif strcmpi(freq, 'med'); freq = 500;
elseif strcmpi(freq, 'medium'); freq = 500;
elseif strcmpi(freq, 'low'); freq = 300;
end
end
nSample = me.frequency*durationSec;
soundVec = sin(2*pi*freq*(1:nSample)/me.frequency);
soundVec = [soundVec;soundVec];
% Scale down the volume
soundVec = soundVec * fVolume;
PsychPortAudio('FillBuffer', me.aHandle, soundVec);
PsychPortAudio('Start', me.aHandle);
if me.verbose; me.logOutput('beep','Beep'); end
end
% ===================================================================
%> @brief
%>
% ===================================================================
function run(me)
setup(me)
play(me);
waitUntilStopped(me);
reset(me);
end
% ===================================================================
%> @brief Reset
%>
% ===================================================================
function reset(me)
try
if ~isempty(me.aHandle)
PsychPortAudio('Stop', me.aHandle, 0, 1);
end
try PsychPortAudio('DeleteBuffer'); end %#ok<*TRYNC>
try
PsychPortAudio('Close',me.aHandle);
catch
PsychPortAudio('Close');
end
if isnan(me.device); me.device = []; end
me.aHandle = [];
me.status = [];
me.frequency = [];
me.isSetup = false; me.isOpen = false; me.isSample = false;
me.silentMode = false;
catch ME
me.aHandle = [];
me.status = [];
me.frequency = [];
me.isSetup = false; me.isOpen = false; me.isSample = false;
getReport(ME)
end
try InitializePsychSound(me.lowLatency); end
end
% ===================================================================
%> @brief Close
%>
% ===================================================================
function close(me)
reset(me);
end
% ===================================================================
%> @brief Close
%>
% ===================================================================
function delete(me)
reset(me);
end
end %---END PUBLIC METHODS---%
%=======================================================================
methods ( Access = protected ) %-------PROTECTED METHODS-----%
%=======================================================================
% ===================================================================
%> @brief findFiles
%>
% ===================================================================
function isValid = checkFiles(me)
isValid = false;
if isempty(me.fileName) || ~exist(me.fileName,'file')
p = mfilename('fullpath');
p = fileparts(p);
me.fileName = [p filesep 'Coo2.wav'];
me.fileNames{1} = me.fileName;
elseif exist(me.fileName,'dir') == 7
findFiles(me);
end
if exist(me.fileName,'file') || ~isempty(me.fileNames)
isValid = true;
end
end
% ===================================================================
%> @brief findFiles
%>
% ===================================================================
function findFiles(me)
if exist(me.fileName,'dir') == 7
d = dir(me.fileName);
n = 0;
for i = 1: length(d)
if d(i).isdir;continue;end
[~,f,e]=fileparts(d(i).name);
if regexpi(e,'wav')
n = n + 1;
me.fileNames{n} = [me.fileName filesep f e];
end
end
end
if ~isempty(me.fileNames); me.isFiles = true; end
end
end %---END PROTECTED METHODS---%
%=======================================================================
methods ( Access = private ) %-------PRIVATE METHODS-----%
%=======================================================================
end %---END PRIVATE METHODS---%
end