function varargout=bss_decomp_tvgain(varargin)% decompose an estimated source into target/interference/noise/artefacts components, assuming the admissible distortion is a time-varying gain.%% Usage:%% [s_target,e_interf[,e_noise],e_artif]=bss_decomp_tvgain(se,index,S[,N],tvshape,tvstep)%% Input:%   - se: row vector of length T containing the estimated source,%   - index: points which component of S se has to be compared to,%   - S: n x T matrix containing the original sources,%   - N: m x T matrix containing the noise on the obseravtions (if any).%   - tvshape : row vector of length V at most T containing the shape of the elementary %     allowed time variations of the gain%   - tvstep  : hop size (in number of samples) between two consecutive%     variations of the gain%% Output:%   - s_target: row vector of length T containing the target source(s)%   contribution,%   - e_interf: row vector of length T containing the interferences%   contribution,%   - e_noise: row vector of length T containing the noise contribution (if%   any),%   - e_artif: row vector of length T containing the artifacts%   contribution.%% Developers:  - Cedric Fevotte (cf269@cam.ac.uk) - Emmanuel Vincent% (vincent@ircam.fr) - Remi Gribonval (remi.gribonval@irisa.fr)       switch nargin    case 5        [varargout{1},varargout{2},varargout{3}]=bss_decomp_tvfilt(varargin{1},varargin{2},varargin{3},varargin{4},varargin{5},0);    case 6        [varargout{1},varargout{2},varargout{3},varargout{4}]=bss_decomp_filt(varargin{1},varargin{2},varargin{3},varargin{4},varargin{5},varargin{6},0);    otherwise        disp('Wrong number of arguments.')end