/// <summary>
/// Load saved byte array into JPEG info format
/// </summary>
/// <param name="savedArray">saved byte array</param>
/// <returns>JPEG info format of loaded file</returns>
public static JPEGInfo loadByteArrayJPEG(byte[] savedArray)
{
savedArray = RLCompression.ModifiedRunLengthDecompress(savedArray);
byte[] widthByteArray = new byte[Compression.intToByteSize];
byte[] heightByteArray = new byte[Compression.intToByteSize];
System.Buffer.BlockCopy(savedArray, 0, widthByteArray, 0,
Compression.intToByteSize);
System.Buffer.BlockCopy(savedArray, Compression.intToByteSize,
heightByteArray, 0, Compression.intToByteSize);
int originalWidth = BitConverter.ToInt32(widthByteArray, 0);
int originalHeight = BitConverter.ToInt32(heightByteArray, 0);
int width = originalWidth;
int height = originalHeight;
if (originalHeight % Compression.DCT_BLOCK_SIZE != 0)
{
height += Compression.DCT_BLOCK_SIZE - (originalHeight % Compression.DCT_BLOCK_SIZE);
}
if (originalWidth % Compression.DCT_BLOCK_SIZE != 0)
{
width += Compression.DCT_BLOCK_SIZE - (originalWidth % Compression.DCT_BLOCK_SIZE);
}
int reducedWidth = (int)Math.Ceiling(originalWidth / 2.0);
int reducedHeight = (int)Math.Ceiling(originalHeight / 2.0);
if (reducedWidth % Compression.DCT_BLOCK_SIZE != 0)
{
reducedWidth += Compression.DCT_BLOCK_SIZE - (reducedWidth % Compression.DCT_BLOCK_SIZE);
}
if (reducedHeight % Compression.DCT_BLOCK_SIZE != 0)
{
reducedHeight += Compression.DCT_BLOCK_SIZE - (reducedHeight % Compression.DCT_BLOCK_SIZE);
}
byte[] qY = new byte[width * height];
byte[] qCr = new byte[reducedWidth * reducedHeight];
byte[] qCb = new byte[reducedWidth * reducedHeight];
System.Buffer.BlockCopy(savedArray, Compression.intToByteSize * 2, qY, 0, qY.Length);
System.Buffer.BlockCopy(savedArray, Compression.intToByteSize * 2 + qY.Length,
qCr, 0, qCr.Length);
System.Buffer.BlockCopy(savedArray, Compression.intToByteSize * 2 + qY.Length +
qCr.Length, qCb, 0, qCb.Length);
YCrCb qYCrCb = new YCrCb(qY, qCr, qCb, height, width, reducedHeight, reducedWidth);
return(new JPEGInfo(originalWidth, originalHeight, qYCrCb));
}
/// <summary>
/// prepare and return save byte array for custom jpeg compressed image
/// </summary>
/// <param name="jpegSaveInfo">JPEGSaveInfo object</param>
/// <returns>Arraysaved byte array</returns>
public static byte[] saveIntoByteArray(JPEGInfo jpegSaveInfo)
{
byte[] widthByteArray = BitConverter.GetBytes(jpegSaveInfo.originalWidth);
byte[] heightByteArray = BitConverter.GetBytes(jpegSaveInfo.originalHeight);
byte[] compressedByteArray = new byte[widthByteArray.Length + heightByteArray.Length +
jpegSaveInfo.qYCrCb.Y.Length + jpegSaveInfo.qYCrCb.Cr.Length + jpegSaveInfo.qYCrCb.Cb.Length];
System.Buffer.BlockCopy(widthByteArray, 0, compressedByteArray, 0, widthByteArray.Length);
System.Buffer.BlockCopy(heightByteArray, 0, compressedByteArray, widthByteArray.Length, heightByteArray.Length);
System.Buffer.BlockCopy(jpegSaveInfo.qYCrCb.Y, 0, compressedByteArray, widthByteArray.Length + heightByteArray.Length,
jpegSaveInfo.qYCrCb.Y.Length);
System.Buffer.BlockCopy(jpegSaveInfo.qYCrCb.Cr, 0, compressedByteArray, widthByteArray.Length + heightByteArray.Length
+ jpegSaveInfo.qYCrCb.Y.Length, jpegSaveInfo.qYCrCb.Cr.Length);
System.Buffer.BlockCopy(jpegSaveInfo.qYCrCb.Cb, 0, compressedByteArray, widthByteArray.Length + heightByteArray.Length
+ jpegSaveInfo.qYCrCb.Y.Length + jpegSaveInfo.qYCrCb.Cr.Length, jpegSaveInfo.qYCrCb.Cb.Length);
compressedByteArray = RLCompression.ModifiedRunLengthCompression(compressedByteArray);
return(compressedByteArray);
}
/// <summary>
/// prepare and return save byte array for custom mpeg compressed images
/// </summary>
/// <param name="mpegSaveInfo">mpeg save info</param>
/// <returns>saved byte array</returns>
public static byte[] saveIntoByteArray(MPEGInfo mpegSaveInfo)
{
byte[] widthByteArray = BitConverter.GetBytes(mpegSaveInfo.originalWidth);
byte[] heightByteArray = BitConverter.GetBytes(mpegSaveInfo.originalHeight);
YCrCb[] iFrames = mpegSaveInfo.iFrames;
PFrame[] pFrames = mpegSaveInfo.pFrames;
int iFramesSpace = iFrames.Length * (iFrames[0].Y.Length + iFrames[0].Cr.Length * 2);
int pFramesSpace = pFrames.Length * (pFrames[0].MotionVectorsY.Length * 6 +
pFrames[0].DiffBlock.Y.Length + pFrames[0].DiffBlock.Cr.Length * 2);
byte[] compressedByteArray = new byte[widthByteArray.Length +
heightByteArray.Length + iFramesSpace + pFramesSpace];
int offset = 0;
int numOfFrame = iFrames.Length + pFrames.Length;
System.Buffer.BlockCopy(widthByteArray, 0, compressedByteArray, 0, widthByteArray.Length);
offset += widthByteArray.Length;
System.Buffer.BlockCopy(heightByteArray, 0, compressedByteArray, offset, heightByteArray.Length);
offset += heightByteArray.Length;
int pFrameIndex = 0;
for (int i = 0; i < numOfFrame; i++)
{
if (i % Compression.I_FRAME_RANGE == 0)
{
YCrCb frame = iFrames[i / Compression.I_FRAME_RANGE];
System.Buffer.BlockCopy(frame.Y, 0, compressedByteArray, offset, frame.Y.Length);
offset += frame.Y.Length;
System.Buffer.BlockCopy(frame.Cr, 0, compressedByteArray, offset, frame.Cr.Length);
offset += frame.Cr.Length;
System.Buffer.BlockCopy(frame.Cb, 0, compressedByteArray, offset, frame.Cb.Length);
offset += frame.Cb.Length;
}
else
{
PFrame frame = pFrames[pFrameIndex];
System.Buffer.BlockCopy(ArrayTransform.convertToByteFromVector(frame.MotionVectorsY), 0,
compressedByteArray, offset, frame.MotionVectorsY.Length * 2);
offset += frame.MotionVectorsY.Length * 2;
System.Buffer.BlockCopy(ArrayTransform.convertToByteFromVector(frame.MotionVectorsCr), 0,
compressedByteArray, offset, frame.MotionVectorsCr.Length * 2);
offset += frame.MotionVectorsCr.Length * 2;
System.Buffer.BlockCopy(ArrayTransform.convertToByteFromVector(frame.MotionVectorsCb), 0,
compressedByteArray, offset, frame.MotionVectorsCb.Length * 2);
offset += frame.MotionVectorsCb.Length * 2;
System.Buffer.BlockCopy(frame.DiffBlock.Y, 0, compressedByteArray,
offset, frame.DiffBlock.Y.Length);
offset += frame.DiffBlock.Y.Length;
System.Buffer.BlockCopy(frame.DiffBlock.Cr, 0, compressedByteArray,
offset, frame.DiffBlock.Cr.Length);
offset += frame.DiffBlock.Cr.Length;
System.Buffer.BlockCopy(frame.DiffBlock.Cb, 0, compressedByteArray,
offset, frame.DiffBlock.Cb.Length);
offset += frame.DiffBlock.Cb.Length;
pFrameIndex++;
}
}
compressedByteArray = RLCompression.ModifiedRunLengthCompression(compressedByteArray);
return(compressedByteArray);
}
/// <summary>
/// Loads a saved mpeg byte array
/// </summary>
/// <param name="savedArray">saved mpeg byte array</param>
/// <returns>MPEGInfo of the saved mpeg images</returns>
public static MPEGInfo loadByteArrayMPEG(byte[] savedArray)
{
savedArray = RLCompression.ModifiedRunLengthDecompress(savedArray);
byte[] widthByteArray = new byte[Compression.intToByteSize];
byte[] heightByteArray = new byte[Compression.intToByteSize];
int offset = 0;
System.Buffer.BlockCopy(savedArray, 0, widthByteArray, 0, Compression.intToByteSize);
offset += Compression.intToByteSize;
System.Buffer.BlockCopy(savedArray, offset, heightByteArray, 0, Compression.intToByteSize);
offset += Compression.intToByteSize;
int originalWidth = BitConverter.ToInt32(widthByteArray, 0);
int originalHeight = BitConverter.ToInt32(heightByteArray, 0);
// recalculate iframe width and height
int iFrameYWidth = originalWidth;
int iFrameYHeight = originalHeight;
int iFrameCrCbWidth = (int)Math.Ceiling(originalWidth / 2.0);
int iFrameCrCbHeight = (int)Math.Ceiling(originalHeight / 2.0);
if (originalWidth % Compression.DCT_BLOCK_SIZE != 0)
{
iFrameYWidth += Compression.DCT_BLOCK_SIZE - (originalWidth % Compression.DCT_BLOCK_SIZE);
}
if (originalHeight % Compression.DCT_BLOCK_SIZE != 0)
{
iFrameYHeight += Compression.DCT_BLOCK_SIZE - (originalHeight % Compression.DCT_BLOCK_SIZE);
}
if (iFrameCrCbWidth % Compression.DCT_BLOCK_SIZE != 0)
{
iFrameCrCbWidth += Compression.DCT_BLOCK_SIZE - (iFrameCrCbWidth % Compression.DCT_BLOCK_SIZE);
}
if (iFrameCrCbHeight % Compression.DCT_BLOCK_SIZE != 0)
{
iFrameCrCbHeight += Compression.DCT_BLOCK_SIZE - (iFrameCrCbHeight % Compression.DCT_BLOCK_SIZE);
}
int pFrameYWidth = originalWidth;
int pFrameYHeight = originalHeight;
int pFrameCrCbWidth = (int)Math.Ceiling(originalWidth / 2.0);
int pFrameCrCbHeight = (int)Math.Ceiling(originalHeight / 2.0);
if (originalWidth % Compression.macroSizeY != 0)
{
pFrameYWidth += Compression.macroSizeY - (originalWidth % Compression.macroSizeY);
}
if (originalHeight % Compression.macroSizeY != 0)
{
pFrameYHeight += Compression.macroSizeY - (originalHeight % Compression.macroSizeY);
}
if (pFrameCrCbWidth % Compression.macroSizeCrCb != 0)
{
pFrameCrCbWidth += Compression.macroSizeCrCb - (pFrameCrCbWidth % Compression.macroSizeCrCb);
}
if (pFrameCrCbHeight % Compression.macroSizeCrCb != 0)
{
pFrameCrCbHeight += Compression.macroSizeCrCb - (pFrameCrCbHeight % Compression.macroSizeCrCb);
}
int motionVectorsSize = pFrameYWidth / Compression.macroSizeY * pFrameYHeight / Compression.macroSizeY;
int iYCrCbSize = iFrameYWidth * iFrameYHeight + iFrameCrCbHeight * iFrameCrCbWidth * 2;
int pYCrCbSize = pFrameYWidth * pFrameYHeight + pFrameCrCbHeight * pFrameCrCbWidth * 2;
int pMVSize = motionVectorsSize * 6;
int numOfFrames = 0;
int numOfIFrames = 0;
int numOfPFrames = 0;
int currentRemaining = savedArray.Length - Compression.intToByteSize * 2;
while (currentRemaining > 0)
{
if (numOfFrames % 10 == 0)
{
currentRemaining -= iYCrCbSize;
numOfIFrames++;
}
else
{
currentRemaining -= (pYCrCbSize + pMVSize);
numOfPFrames++;
}
numOfFrames++;
}
YCrCb[] iFrames = new YCrCb[numOfIFrames];
PFrame[] pFrames = new PFrame[numOfPFrames];
int pFrameIndex = 0;
for (int i = 0; i < numOfFrames; i++)
{
byte[] iFrameY = new byte[iFrameYHeight * iFrameYWidth];
byte[] iFrameCr = new byte[iFrameCrCbHeight * iFrameCrCbWidth];
byte[] iFrameCb = new byte[iFrameCr.Length];
byte[] pFrameY = new byte[pFrameYHeight * pFrameYWidth];
byte[] pFrameCr = new byte[pFrameCrCbHeight * pFrameCrCbWidth];
byte[] pFrameCb = new byte[pFrameCr.Length];
byte[] motionVectorsYByte = new byte[motionVectorsSize * 2];
byte[] motionVectorsCrByte = new byte[motionVectorsSize * 2];
byte[] motionVectorsCbByte = new byte[motionVectorsSize * 2];
if (i % Compression.I_FRAME_RANGE == 0)
{
System.Buffer.BlockCopy(savedArray, offset, iFrameY, 0, iFrameY.Length);
offset += iFrameY.Length;
System.Buffer.BlockCopy(savedArray, offset, iFrameCr, 0, iFrameCr.Length);
offset += iFrameCr.Length;
System.Buffer.BlockCopy(savedArray, offset, iFrameCb, 0, iFrameCb.Length);
offset += iFrameCb.Length;
iFrames[i / Compression.I_FRAME_RANGE] = new YCrCb(iFrameY, iFrameCr, iFrameCb,
iFrameYHeight, iFrameYWidth, iFrameCrCbHeight, iFrameCrCbWidth);
}
else
{
System.Buffer.BlockCopy(savedArray, offset, motionVectorsYByte, 0, motionVectorsSize * 2);
offset += motionVectorsSize * 2;
System.Buffer.BlockCopy(savedArray, offset, motionVectorsCrByte, 0, motionVectorsSize * 2);
offset += motionVectorsSize * 2;
System.Buffer.BlockCopy(savedArray, offset, motionVectorsCbByte, 0, motionVectorsSize * 2);
offset += motionVectorsSize * 2;
System.Buffer.BlockCopy(savedArray, offset, pFrameY, 0, pFrameY.Length);
offset += pFrameY.Length;
System.Buffer.BlockCopy(savedArray, offset, pFrameCr, 0, pFrameCr.Length);
offset += pFrameCr.Length;
System.Buffer.BlockCopy(savedArray, offset, pFrameCb, 0, pFrameCb.Length);
offset += pFrameCb.Length;
YCrCb diffBlock = new YCrCb(pFrameY, pFrameCr, pFrameCb, pFrameYHeight, pFrameYWidth,
pFrameCrCbHeight, pFrameCrCbWidth);
pFrames[pFrameIndex++] = new PFrame(diffBlock, ArrayTransform.convertToVectorFromByte(motionVectorsYByte),
ArrayTransform.convertToVectorFromByte(motionVectorsCrByte), ArrayTransform.convertToVectorFromByte(motionVectorsCbByte));
}
}
return(new MPEGInfo(originalWidth, originalHeight, iFrames, pFrames));
}
