tomwalters@0: % support file for 'aim-mat'
tomwalters@0: %
tomwalters@0: % This external file is included as part of the 'aim-mat' distribution package
bleeck@3: % (c) 2011, University of Southampton
bleeck@3: % Maintained by Stefan Bleeck (bleeck@gmail.com)
bleeck@3: % download of current version is on the soundsoftware site: 
bleeck@3: % http://code.soundsoftware.ac.uk/projects/aimmat
bleeck@3: % documentation and everything is on http://www.acousticscale.org
bleeck@3: 
tomwalters@0: 
tomwalters@0: function ok=aifcwrite(x,fs,nbits,fname)
tomwalters@0: 
tomwalters@0: %	function ok=aiffwrite(x,fs,nbits,fname)
tomwalters@0: %	Write AIFF and AIFF-C file
tomwalters@0: %	This is a reduced version and does not fulfill the
tomwalters@0: %	AIFF-C standard.
tomwalters@0: 
tomwalters@0: %	Coded by Hideki Kawahara based on "Audio Interchange file format AIFF-C draft"
tomwalters@0: %		by Apple Computer inc. 8/26/91
tomwalters@0: %	14/Feb./1998
tomwalters@0: 
tomwalters@0: ok=1;
tomwalters@0: [nr,nc]=size(x);
tomwalters@0: if nc>nr
tomwalters@0:     ok=[];
tomwalters@0: 	disp('Data must be a set of column vector.');
tomwalters@0: 	return;
tomwalters@0: end;
tomwalters@0: nex=floor(log(fs)/log(2));
tomwalters@0: vv=fs/2^(nex+1)*2^(4*16);
tomwalters@0: nex2=nex+16383;
tomwalters@0: 
tomwalters@0: fid=fopen(fname,'w');
tomwalters@0: fwrite(fid,'FORM','char')
tomwalters@0: cksize=82+nr*nc*(nbits/8);
tomwalters@0: fwrite(fid,cksize,'int32');
tomwalters@0: fwrite(fid,'AIFC','char');
tomwalters@0: 
tomwalters@0: fwrite(fid,'FVER','char');
tomwalters@0: fwrite(fid,4,'int32');
tomwalters@0: fwrite(fid,2726318400,'uint32');
tomwalters@0: 
tomwalters@0: fwrite(fid,'COMM','char');
tomwalters@0: fwrite(fid,38,'int32');
tomwalters@0: fwrite(fid,nc,'int16');
tomwalters@0: fwrite(fid,nr,'int32');
tomwalters@0: fwrite(fid,nbits,'int16');
tomwalters@0: fwrite(fid,nex2,'uint16');
tomwalters@0: fwrite(fid,vv,'uint64');
tomwalters@0: fwrite(fid,'NONE','char');
tomwalters@0: fwrite(fid,14,'uint8');
tomwalters@0: fwrite(fid,'not compressed','char');
tomwalters@0: fwrite(fid,0,'char');
tomwalters@0: 
tomwalters@0: fwrite(fid,'SSND','char');
tomwalters@0: fwrite(fid,nr*nc*(nbits/8)+8,'int32');
tomwalters@0: fwrite(fid,0,'int32');
tomwalters@0: fwrite(fid,0,'int32');
tomwalters@0: y=x';
tomwalters@0: switch(nbits)
tomwalters@0:    case 8
tomwalters@0:        fwrite(fid,y(:),'int8');
tomwalters@0:    case 16
tomwalters@0:        fwrite(fid,y(:),'int16');
tomwalters@0: end;
tomwalters@0: fclose(fid);
tomwalters@0: