source: orbit/octave/GenerateAudioCommand/flyCommand.m @ a0b523e

function fullCodeWave=flyCommand(code,space,audioFileName,sps,repeatTime,AndroidOriOS,flipOrNot) 

% code: array of 1s and 0s. 1 means bit "1", 0 means bit "0".
% audioFileName: like 'audio.wav'.
% space: space between codes [samples]
bps = 16;       % bits per sample
%sps = 96000;     % sample rate [samples/s]


if code=='demo1'
        code=[1 0 1 1 0 1 1 1 0 1 0 0 1 1 0 0 1 0 0 1 1 1 1 1 0 1 1 0];%minimum rotating throttle
elseif code=='demo2'
        code=[1 1 1 1 1 1 1 1 0 1 0 0 0 1 1 0 1 0 0 1 1 1 1 1 0 0 0 0];%maximum throttle

elseif code=='demo3'
        code=[0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 1 1 1 1 1 0 0 1 1 1 1 1 0 1 1 0];%minimum throttle
elseif code=='demo4'
        code=[1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 0 0 0 ];%test for Untitled 04
        endif

if (length(AndroidOriOS)==3)%'iOS'
longHIGH=875;longHIGH_s=floor(longHIGH*sps/1e6)+1;%longHIGH[us] longHIGH_s[sample]
longLOW=729;longLOW_s=floor(longLOW*sps/1e6);
shortHIGH=458;shortHIGH_s=floor(shortHIGH*sps/1e6)+1;
shortLOW=333;shortLOW_s=floor(shortLOW*sps/1e6);

codeWave=[halfSineGenDirect('u',longHIGH_s,0,1,sps);zeros(shortLOW_s,1);halfSineGenDirect('u',longHIGH_s,0,1,sps);zeros(shortLOW_s,1)]; %starting 5 half period

% notice that the "code" here should be a 28 bit binary array.
for i=1:size(code,2)
        codeWave = [codeWave; bitGenHDMI(code(i),1,sps,longHIGH_s,longLOW_s,shortHIGH_s,shortLOW_s)];
endfor

codeWave=[codeWave; halfSineGenDirect('u',longHIGH_s,0,1,sps)]; %last half period

if(flipOrNot=='flip')
        codeWave=-codeWave;
endif

fullCodeWave=[];
for i=1:repeatTime
        fullCodeWave=[fullCodeWave; codeWave; zeros(space,1)];
endfor


%fullCodeWave=[fullCodeWave zeros(sizeof(fullCodeWave))];

elseif length(AndroidOriOS)==7 %'Android'

longHIGH=875;longHIGH_s=floor(longHIGH*sps/1e6)-4;%longHIGH[us]  longHIGH_s[sample]
longLOW=729;longLOW_s=floor(longLOW*sps/1e6+3);
shortHIGH=458;shortHIGH_s=floor(shortHIGH*sps/1e6)-2;
shortLOW=333;shortLOW_s=floor(shortLOW*sps/1e6)+1;

codeWave=[halfSineGenDirect('d',longLOW_s-1,0,1,sps);halfSineGenDirect('u',longHIGH_s-2,0,1,sps);             halfSineGenDirect('d',shortLOW_s-1,0,1,sps);halfSineGenDirect('u',longHIGH_s-2,0,1,sps); halfSineGenDirect('d',shortLOW_s,0,1,sps);0]; %starting 5 half period

% notice that the "code" here should be a 28 bit binary array.
m=0;
n=0;
for i=1:size(code,2)
codeWave = [codeWave; bitGenDirect(code(i),1,sps,longHIGH_s,   longLOW_s,shortHIGH_s,shortLOW_s)];
if code(i)==1
        n=n+1;
elseif code(i)==0
        m=m+1;
endif

if n==115 
        n=0;
        codeWave=[codeWave;0];
endif
if m==101
        m=0;
        codeWave=[codeWave;0];
endif
        
endfor

codeWave=[codeWave; halfSineGenDirect('u',longHIGH_s,0,1,sps)];  %last half period

if(flipOrNot=='flip')
    codeWave=-codeWave;
endif

fullCodeWave=[];
for i=1:repeatTime
            fullCodeWave=[fullCodeWave; codeWave; zeros(space,1)];
endfor


endif %if AndroidOriOS=='iOS'

wavwrite(fullCodeWave, sps, bps, audioFileName);