Undefined function or variable 'pawavplayw'.

1 次查看（过去 30 天）
Mohammad Shahjahan
评论： Walter Roberson 2016-4-10
I am new to matlab. I am trying to run a code in matlab. The code uses : 'pa_wavplay' which requires some .dll files. On running the code using a figure, I get the following error:
Undefined function or variable 'pawavplayw'.
The file pawavplayw.dll is present in the directory. But, still I am getting the error.
function pa_wavplay(varargin)
% pa_wavplay: playback a matrix to multichannel sound hardware
%
% Usage: pa_wavplay([devicetype])
% pa_wavplay(buffer, [samplerate], [deviceid], [devicetype])
%
% pa_wavplay is a tool for playing multi-channel audio through your ASIO
% device. Arguments in [] are optional
%
% pa_wavplay([devicetype]) will list all your audio devices for that
% device type then exit.
%
% - buffer is the matrix to play
% - samplerate is the sampling frequency. Default: 44100
% - deviceid is the device id to use for output. Default: 0
% - devicetype determines which sound driver to use
% 'win' Windows Multimedia Device
% 'dx' DirectX DirectSound driver
% 'asio' ASIO Driver (default)
%
% For stereo playback, buffer should be an N-by-2 matrix. The number of
% audio channels supported is hardware dependent.
%
% samplerate should be a valid integer sample rate, eg. 22050 44100 etc.
%
% As of pa_wavplay 0.2, buffer should be either of type double or
% single. pa_wavplay uses 32-bit floats (single) internally.
%
% SEE ALSO: pa_wavrecord, pa_wavplayrecord
% check right num of args
error(nargchk(0,4,nargin));
% defaults
device_opt = 1;
device = 0;
fs = 44100;
% no args, print devices for asio
if (nargin==0)
pawavplaya;
return;
end
% if devtype specified
if ischar(varargin{end}),
s=varargin{end};
varargin(end)=[];
device_opt = strmatch(s,{'asio','win', 'dx'});
if isempty(device_opt),
error(['Unrecognized DEVICETYPE: ' s]);
end
if (nargin==1)
if device_opt==1, % asio
pawavplaya;
end
if device_opt==2, % win
pawavplayw;
end
if device_opt==3, % dx
pawavplayx;
end
return;
end
end
% data buffer
y = varargin{1};
% sample rate
if length(varargin)>=2,
fs=varargin{2};
end
% device id
if length(varargin) >= 3,
if (~(ischar(varargin{3})))
device = varargin{3};
end
end
if device_opt==1, % asio
fprintf('Using ASIO driver\n');
pawavplaya(y, device, fs, 0, 0, 0, -1);
elseif device_opt==2, % win
fprintf('Using WMME driver\n');
pawavplayw(y, device, fs, 0, 0, 0, -1);
elseif device_opt==3, % dx
fprintf('Using DirectX driver\n');
pawavplayx(y, device, fs, 0, 0, 0, -1);
end
% [EOF] pa_wavplay.m

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回答（1 个）

Walter Roberson
Walter Roberson 2016-4-9
If you are using http://www.mathworks.com/matlabcentral/fileexchange/47336-pa-wavplay-for-32-bit-and-64-bit then:
Possibly you are not using MS Windows. Or possibly you have not compiled the mex source.
  2 个评论
Mohammad Shahjahan
Mohammad Shahjahan 2016-4-9
I am using the file you mentioned. Can you guide me to compile mex source?
Walter Roberson
Walter Roberson 2016-4-10
Install a compatible compiler.
Download portaudio and unzip it into a new directory that is not under the MATLAB installation directories. Then follow the instructions at http://portaudio.com/docs/v19-doxydocs/compile_windows.html
Then go into MATLAB and cd to the directory that you stored the waveplay in. You will then need to use a command similar to
mex -v -I/usr/local/include -L/usr/local/lib pawavplay_asio.cpp
except that the locations /usr/local/include and /usr/local/lib will need to be adjusted according to where you installed portaudio .
I do not know the exact flags at the moment; I am still working on getting portaudio built properly on my non-Windows system. It appears the code for portaudio is faulty :(

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