V_READFLAC Read a .FLAC format sound file [Y,FS]=(FILENAME,MODE)
Input Parameters:
FILENAME gives the name of the file (with optional .WAV extension) or alternatively
can be the FIDX output from a previous call to READWAV
MODE specifies the following (*=default):
Scaling: 's' Auto scale to make data peak = +-1
'r' Raw unscaled data (integer values)
'q' Scaled to make 0dBm0 be unity mean square
'p' * Scaled to make +-1 equal full scale
'o' Scale to bin centre rather than bin edge (e.g. 127 rather than 127.5 for 8 bit values)
(can be combined with n+p,r,s modes)
'n' Scale to negative peak rather than positive peak (e.g. 128.5 rather than 127.5 for 8 bit values)
(can be combined with o+p,r,s modes)
FLAC (Free lossless audio codec) is a compressed audio file format described here:
http://flac.sourceforge.net/0001 function [y,fs]=v_readflac(filename,mode) 0002 %V_READFLAC Read a .FLAC format sound file [Y,FS]=(FILENAME,MODE) 0003 % 0004 % Input Parameters: 0005 % 0006 % FILENAME gives the name of the file (with optional .WAV extension) or alternatively 0007 % can be the FIDX output from a previous call to READWAV 0008 % MODE specifies the following (*=default): 0009 % 0010 % Scaling: 's' Auto scale to make data peak = +-1 0011 % 'r' Raw unscaled data (integer values) 0012 % 'q' Scaled to make 0dBm0 be unity mean square 0013 % 'p' * Scaled to make +-1 equal full scale 0014 % 'o' Scale to bin centre rather than bin edge (e.g. 127 rather than 127.5 for 8 bit values) 0015 % (can be combined with n+p,r,s modes) 0016 % 'n' Scale to negative peak rather than positive peak (e.g. 128.5 rather than 127.5 for 8 bit values) 0017 % (can be combined with o+p,r,s modes) 0018 % 0019 % FLAC (Free lossless audio codec) is a compressed audio file format described here: 0020 % http://flac.sourceforge.net/ 0021 0022 % Copyright (C) Mike Brookes 2008 0023 % Version: $Id: v_readflac.m 10865 2018-09-21 17:22:45Z dmb $ 0024 % 0025 % VOICEBOX is a MATLAB toolbox for speech processing. 0026 % Home page: http://www.ee.ic.ac.uk/hp/staff/dmb/voicebox/voicebox.html 0027 % 0028 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 0029 % This program is free software; you can redistribute it and/or modify 0030 % it under the terms of the GNU General Public License as published by 0031 % the Free Software Foundation; either version 2 of the License, or 0032 % (at your option) any later version. 0033 % 0034 % This program is distributed in the hope that it will be useful, 0035 % but WITHOUT ANY WARRANTY; without even the implied warranty of 0036 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 0037 % GNU General Public License for more details. 0038 % 0039 % You can obtain a copy of the GNU General Public License from 0040 % http://www.gnu.org/copyleft/gpl.html or by writing to 0041 % Free Software Foundation, Inc.,675 Mass Ave, Cambridge, MA 02139, USA. 0042 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 0043 if nargin<2 0044 mode='p'; 0045 else 0046 mode = [mode(:).' 'p']; 0047 end 0048 dirt=v_voicebox('dir_temp'); 0049 [fnp,fnn,fne]=fileparts(filename); 0050 filetemp=fullfile(dirt,[fnn '.wav']); 0051 doscom=['"' v_voicebox('flac') '"' ' -d -f -o "' filetemp '" "' filename '"']; 0052 % fprintf(1,'Executing: %s\n',doscom); 0053 [doss,dosr]=dos(doscom); % run the program 0054 if doss % test for errors 0055 error(sprintf('Error running DOS command: %s',doscom)); 0056 end 0057 if exist(filetemp)~=2 0058 error(sprintf('No output file from: %s',doscom)); 0059 end 0060 [y,fs]=v_readwav(filetemp,mode); 0061 doscom=['del /f "' filetemp '"']; 0062 if dos(doscom) % run the program 0063 error(sprintf('Error running DOS command: %s',doscom)); 0064 end