gusucode.com > audiovideo工具箱matlab源码程序 > audiovideo/mmcompinfo.m
function ret = mmcompinfo(varargin) %MMCOMPINFO Multimedia compressor information. % COMPINFO = MMCOMPINFO returns a structure COMPINFO containing two % fields, audio compressors and video decompressors. Each of these % fields is an array of structures, each structure containing % information about one of the audio/video compressors on the % system. The individual codec structure fields are Name (name of % the codec, string) and ID (the codec's ID). % % MMCOMPINFO(AorV) returns the number of audio or video % compresors on the system. Set AorV = 'audio' for audio, AorV = % 'video' for video. % % MMCOMPINFO(AorV, NAME) returns the ID of the audio or % video compressor with the given name. If no audio/video % compressor is found with the given name, -1 is returned. % % MMCOMPINFO(AorV, ID) returns the name of the audio or % video compressor with the given ID. % % This function is only for use with 32-bit Windows machines. % % See also MMFILEINFO, AUDIODEVINFO. % Author(s): BJW % Copyright 1984-2013 The MathWorks, Inc. if ~ ispc, error(message('MATLAB:audiovideo:mmcompinfo:invalidPlatform')); end narginchk(0,2); if nargin ~= 0, % specific request ret = MMCodecChooserMex(varargin{:}); else % give back all information about devices numAudioCompressors = MMCodecChooserMex('audio'); numVideoCompressors = MMCodecChooserMex('video'); audioCompressors = []; videoCompressors = []; for i=1:numAudioCompressors, audioCompressors(i).Name = MMCodecChooserMex('audio', i - 1); audioCompressors(i).ID = i - 1; end for i=1:numVideoCompressors, videoCompressors(i).Name = MMCodecChooserMex('video', i - 1); videoCompressors(i).ID = i - 1; end ret.audioCompressors = audioCompressors; ret.videoCompressors = videoCompressors; end % [EOF] mmcompinfo.m