1 files changed, 45 insertions, 0 deletions
diff --git a/webrtc/modules/video_processing/test/readYUV420file.m b/webrtc/modules/video_processing/test/readYUV420file.m
new file mode 100644
index 0000000000..f409820283
--- /dev/null
+++ b/webrtc/modules/video_processing/test/readYUV420file.m
@@ -0,0 +1,45 @@
+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);