Never Gonna Give You Up

Kaustubh
/
Never Gonna Give You Up

on 2 Nov 2024

Cite your audio source here (if applicable):

% Audio Source
% Rick Astley - Never Gonna Give You Up 
drawframe(1);
Error using reshape
Number of elements must not change. Use [] as one of the size inputs to automatically calculate the appropriate size for that dimension.

Error in solution>drawframe (line 16)
        linear = reshape(d, [fs*24, 1]);

Write your drawframe function below

% The audio file can be used to store data as shown in
% Tomoaki Takagi / Mini Hack (Audio to Image)
% Extending his ideo for video to store 96 frames each 40-by-40 pixels,
% and 5-bit color can be stored in 12 seconds of 2-channel audio sampled at
% 8000 Hz, with enough room to also fit another 4 second audio to recreate
% the background audio
function drawframe(f)
    % Read and store the audio data
    persistent linear
    if isempty(linear)
        [d,fs] = audioread("audio.wav");
        linear = reshape(d, [fs*24, 1]);
    end
    
    % Get the data for the given frame
    linearCropped = linear(f*1600-1599:f*1600);
    linearCropped = 1 + reshape(linearCropped, [40,40]) * 32768;
    
    % Assign RGB values for each pixel in 40*40 px image
    % Each element of linearCropped has RGB value for 1 pixel
    % It is a 16-bit double so I used 5 bits to store each of R,G and B
    c = zeros(40,40,3);
    c(:,:,1) = fix(linearCropped / (32*32));
    c(:,:,2) = mod(fix(linearCropped / 32), 32);
    c(:,:,3) = mod(linearCropped, 32);
    c = 8*c/255;          % To get the value between 0 and 1  
    
    % Display the image
    set(gca, 'position', [0 0 1 1]);
    imagesc(c, Interpolation="bilinear");
    axis off;
    
    % Recreate the audio file
    if f==96
        audiowrite('audio.wav', linear(97*1600-1599:97*1600-1599+8000*4), 8000);
    end
    
end

Never Gonna Give You Up

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Never Gonna Give You Up