daniele@160: classdef audio
daniele@166: 	%% Audio object
daniele@166: 	properties
daniele@166: 		s  %vector containing the audio signal
daniele@166: 		S  %matrix containing frames of audio for subsequent processing
daniele@166: 		fs %sampling frequency
daniele@166: 		nBits %number of bits per sample
daniele@166: 		name %string containing the name of the audio file
daniele@166: 		format %string containing the format of the audio file
daniele@166: 		bufferOperator %struct containing the parameters of the buffer operator (used by unbuffer to invert it)
daniele@166: 	end
daniele@166: 	
daniele@166: 	methods
daniele@166: 		%% Constructor
daniele@166: 		function obj = audio(varargin)
daniele@166: 			% if no arguments are specified, prompt for the choice of an
daniele@166: 			% audio file
daniele@166: 			if ~nargin
daniele@166: 				[fileName,pathname] = uigetfile({'*.wav; *.aiff;'},'Select an audio file');
daniele@166: 				varargin{1} = strcat(pathname,filesep,fileName);
daniele@166: 			end
daniele@166: 			if ischar(varargin{1})
daniele@166: 				[~, obj.name obj.format] = fileparts(varargin{1});
daniele@166: 				switch obj.format
daniele@166: 					case '.wav'
daniele@166: 						[obj.s obj.fs obj.nBits] = wavread(varargin{1});
daniele@166: 					otherwise
daniele@166: 						error('Unsupported audio format')
daniele@166: 				end
daniele@166: 			else
daniele@166: 				obj.s = varargin{1};
daniele@166: 				if nargin>1, obj.fs = varargin{2}; else obj.fs = []; end
daniele@166: 				if nargin>2, obj.nBits = varargin{3}; else obj.nBits = []; end
daniele@166: 				if nargin>3, obj.name = varargin{4}; else obj.name = []; end
daniele@166: 				if nargin>4, obj.format = varargin{5}; else obj.format = []; end
daniele@166: 			end
daniele@166: 			obj.S = [];
daniele@166: 			obj.bufferOperator = [];
daniele@166: 		end
daniele@166: 		
daniele@166: 		%% Playback functions
daniele@166: 		function player = play(obj, player)
daniele@166: 			if ~exist('player','var') || isempty(player)
daniele@166: 				player = audioplayer(obj.s,obj.fs);
daniele@166: 			end
daniele@166: 			play(player);
daniele@166: 		end
daniele@166: 		
daniele@166: 		function player = stop(obj, player)
daniele@166: 			if ~exist('player','var') || isempty(player)
daniele@166: 				player = audioplayer(obj.s,obj.fs);
daniele@166: 			end
daniele@166: 			stop(player)
daniele@166: 		end
daniele@166: 		
daniele@166: 		function player = pause(obj, player)
daniele@166: 			if ~exist('player','var') || isempty(player)
daniele@166: 				player = audioplayer(obj.s,obj.fs);
daniele@166: 			end
daniele@166: 			pause(player)
daniele@166: 		end
daniele@166: 	end
daniele@160: end