modules/video_processing: refactor interface->include + more.

webrtc/modules/video_processing/main/test/unit_test/readYUV420file.m

-function [Y,U,V] = readYUV420file(filename, width, height)
-% [Y,U,V] = readYUVfile(filename, width, height)
-
-fid = fopen(filename,'rb');
-if fid==-1
-    error(['Cannot open file ' filename]);
-end
-
-% Number of pixels per image
-nPx=width*height;
-
-% nPx bytes luminance, nPx/4 bytes U, nPx/4 bytes V
-frameSizeBytes = nPx*1.5; 
-
-% calculate number of frames
-fseek(fid,0,'eof'); % move to end of file
-fileLen=ftell(fid); % number of bytes
-fseek(fid,0,'bof'); % rewind to start
-
-% calculate number of frames
-numFrames = floor(fileLen/frameSizeBytes);
-
-Y=uint8(zeros(height,width,numFrames));
-U=uint8(zeros(height/2,width/2,numFrames));
-V=uint8(zeros(height/2,width/2,numFrames));
-
-[X,nBytes]=fread(fid, frameSizeBytes, 'uchar');
-
-for k=1:numFrames
-    
-    % Store luminance
-    Y(:,:,k)=uint8(reshape(X(1:nPx), width, height).');
-    
-    % Store U channel
-    U(:,:,k)=uint8(reshape(X(nPx + (1:nPx/4)), width/2, height/2).');
-
-    % Store V channel
-    V(:,:,k)=uint8(reshape(X(nPx + nPx/4 + (1:nPx/4)), width/2, height/2).');
-    
-    % Read next frame
-    [X,nBytes]=fread(fid, frameSizeBytes, 'uchar');
-end
-
-    
-fclose(fid);