authMultimediaAssignment2018/Level_1/demoAAC1.m

function SNR = demoAAC1(fNameIn, fNameOut)
%Implementation of WHAT?? //TODO!!
%   Usage SNR = demoAAC1(fNameIn, fNameOut), where:
%       Inputs
%       - fNameIn is the filename and path of the file to encode
%       - fNameOut is the filename and path of the file that will be
%       written after decoding
%
%       Output
%       - SNR is the signal to noise ration computed after successively
%       encoding and decoding the audio signal

    AACSeq1 = AACoder1(fNameIn);
    decodedAudio = iAACoder1(AACSeq1, fNameOut);

    [audioData, ~] = audioread(fNameIn);
    
%     figure()
%     plot(audioData(1:length(decodedAudio), 1) - decodedAudio(1:end, 1))
%     figure()
%     plot(audioData(1:length(decodedAudio), 2) - decodedAudio(1:end, 2))
%     
%     snr(audioData(1:length(decodedAudio), 1), audioData(1:length(decodedAudio), 1) - decodedAudio(1:end, 1))
%     snr(audioData(1:length(decodedAudio), 2), audioData(1:length(decodedAudio), 2) - decodedAudio(1:end, 2))
%     SNR = 10*log10((sum(audioData(1:length(decodedAudio), :)) .^ 2) ./ ...
%         (sum(audioData(1:length(decodedAudio), :) - decodedAudio) .^ 2));
    
    figure()
    plot(audioData(1024:length(decodedAudio)-1024, 1) - decodedAudio(1024:end-1024, 1))
    figure()
    plot(audioData(1024:length(decodedAudio)-1024, 2) - decodedAudio(1024:end-1024, 2))
    
    snr(audioData(1024:length(decodedAudio)-1024, 1), audioData(1024:length(decodedAudio)-1024, 1) - decodedAudio(1024:end-1024, 1))
    snr(audioData(1024:length(decodedAudio)-1024, 2), audioData(1024:length(decodedAudio)-1024, 2) - decodedAudio(1024:end-1024, 2))
    SNR = 10*log10((var(audioData(1024:length(decodedAudio)-1024, :)) .^ 2) ./ ...
        (var(audioData(1024:length(decodedAudio)-1024, :) - decodedAudio(1024:end-1024, :)) .^ 2));
end