public virtual Bitmap view()
{
if (isDirty)
{
clean();
}
if (state != null && (state.type == DataBlob.Type.Image || state.bmp != null))
{
return(state.bmp);
}
if (state != null && state.type == DataBlob.Type.Channels && state.channels != null)
{
Size s = Subsample.deduceCbCrSize(state);
Bitmap bmp = new Bitmap(state.channelWidth, state.channelHeight, PixelFormat.Format24bppRgb);
BitmapData bmpData = bmp.LockBits(
new Rectangle(0, 0, bmp.Width, bmp.Height),
System.Drawing.Imaging.ImageLockMode.ReadWrite,
bmp.PixelFormat);
IntPtr ptr = bmpData.Scan0;
//copy bytes
int nBytes = Math.Abs(bmpData.Stride) * bmp.Height;
byte[] rgbValues = new byte[nBytes];
System.Runtime.InteropServices.Marshal.Copy(ptr, rgbValues, 0, nBytes);
//order: B,G,R, B,G,R, ...
int channelIndex = 0;
int counter = 0;
int channelIndexRB = 0;
for (int y = 0; y < state.imageHeight; y++)
{
channelIndex = y * state.channelWidth;
channelIndexRB = y * s.Width;
counter = y * bmpData.Stride;
for (int x = 0; x < state.imageWidth; x++)
{
rgbValues[counter + 2] = state.channels[0][channelIndex];
if (y < s.Height && x < s.Width)
{
rgbValues[counter + 1] = state.channels[1][channelIndexRB];
rgbValues[counter + 0] = state.channels[2][channelIndexRB];
channelIndexRB++;
}
counter += 3;
channelIndex++;
}
}
System.Runtime.InteropServices.Marshal.Copy(rgbValues, 0, ptr, nBytes);
bmp.UnlockBits(bmpData);
state.bmp = bmp;
return(bmp);
}
//Debug.Write("View missing in " + properties["name"].getString() + "\n");
return(null);
}
private void reassemble(byte[][] past, byte[][] diff, byte[][] vectors)
{
Chunker c = new Chunker(chunkSize, state.channelWidth, state.channelHeight, state.channelWidth, 1);
int pixelTL;
for (int i = 0; i < c.getNumChunks(); i++)
{
pixelTL = c.chunkIndexToPixelIndex(i);
//update channels to be difference.
restoreChunk(state.channels[0], past[0], diff[0], vectors[0][i], pixelTL, state.channelWidth);
}
//Do the second two channels
Size smaller = Subsample.deduceCbCrSize(state);
c = new Chunker(chunkSize, smaller.Width, smaller.Height, smaller.Width, 1);
for (int i = 0; i < c.getNumChunks(); i++)
{
pixelTL = c.chunkIndexToPixelIndex(i);
restoreChunk(state.channels[1], past[1], diff[1], vectors[1][i], pixelTL, smaller.Width);
restoreChunk(state.channels[2], past[2], diff[2], vectors[2][i], pixelTL, smaller.Width);
}
}
private void setupBlobs(DataBlob metadata)
{
C1 = new DataBlob();
C2 = new DataBlob();
C3 = new DataBlob();
V2 = new DataBlob();
V3 = new DataBlob();
C1.type = C2.type = C3.type = DataBlob.Type.Channels;
V2.type = V3.type = DataBlob.Type.Vectors;
//import metadata onto channels
C1.imageWidth = C2.imageWidth = C3.imageWidth = metadata.imageWidth;
C1.imageHeight = C2.imageHeight = C3.imageHeight = metadata.imageHeight;
C1.channelWidth = C2.channelWidth = C3.channelWidth = metadata.channelWidth;
C1.channelHeight = C2.channelHeight = C3.channelHeight = metadata.channelHeight;
C1.quantizeQuality = C2.quantizeQuality = C3.quantizeQuality = metadata.quantizeQuality;
C1.samplingMode = C2.samplingMode = C3.samplingMode = metadata.samplingMode;
Chunker c = new Chunker(8, metadata.channelWidth, metadata.channelHeight, metadata.channelWidth, 1);
V2.imageWidth = V3.imageWidth = metadata.imageWidth;
V2.imageHeight = V3.imageHeight = metadata.imageHeight;
V2.channelWidth = V3.channelWidth = c.getChunksWide();
V2.channelHeight = V3.channelHeight = c.getChunksHigh();
V2.quantizeQuality = V3.quantizeQuality = metadata.quantizeQuality;
V2.samplingMode = V3.samplingMode = metadata.samplingMode;
//Allocate space for incoming data
C1.channels = new byte[3][];
C2.channels = new byte[3][];
C3.channels = new byte[3][];
V2.channels = new byte[3][];
V3.channels = new byte[3][];
int cMajor = C1.channelWidth * C1.channelHeight;
Size sizeMinor = Subsample.getPaddedCbCrSize(new Size(C1.channelWidth, C1.channelHeight), C1.samplingMode);
int cMinor = sizeMinor.Width * sizeMinor.Height;
C1.channels[0] = new byte[cMajor];
C2.channels[0] = new byte[cMajor];
C3.channels[0] = new byte[cMajor];
C1.channels[1] = new byte[cMinor];
C2.channels[1] = new byte[cMinor];
C3.channels[1] = new byte[cMinor];
C1.channels[2] = new byte[cMinor];
C2.channels[2] = new byte[cMinor];
C3.channels[2] = new byte[cMinor];
cMajor = V2.channelWidth * V2.channelHeight;
sizeMinor = Subsample.getCbCrSize(new Size(V2.channelWidth, V2.channelHeight), V2.samplingMode);
cMinor = sizeMinor.Width * sizeMinor.Height;
V2.channels[0] = new byte[cMajor];
V3.channels[0] = new byte[cMajor];
V2.channels[1] = new byte[cMinor];
V3.channels[1] = new byte[cMinor];
V2.channels[2] = new byte[cMinor];
V3.channels[2] = new byte[cMinor];
}
private void readChannels(BinaryReader reader, DataBlob ch)
{
Chunker c = new Chunker(8, ch.channelWidth, ch.channelHeight, ch.channelWidth, 1);
readChannel(reader, ch.channels[0], c);
Size s = Subsample.deduceCbCrSize(ch);
c = new Chunker(8, s.Width, s.Height, s.Width, 1);
readChannel(reader, ch.channels[1], c);
readChannel(reader, ch.channels[2], c);
}
protected static void writeChannels(BinaryWriter writer, DataBlob ch)
{
Chunker c = new Chunker(8, ch.channelWidth, ch.channelHeight, ch.channelWidth, 1);
writeChannel(writer, ch.channels[0], c);
Size s = Subsample.deduceCbCrSize(ch);
c = new Chunker(8, s.Width, s.Height, s.Width, 1);
writeChannel(writer, ch.channels[1], c);
writeChannel(writer, ch.channels[2], c);
}
private void calcMoVec(byte[][] chOld, byte[][] chNew)
{
//for each channel
//chunk state.channels into 8x8 blocks
//compare each block with blocks surrounding them in the arg channels
//over x = [-7,7] (range 15 values)
//and y = [-7,7] (range 15 values)
//Do the first channel
Chunker c = new Chunker(chunkSize, state.channelWidth, state.channelHeight, state.channelWidth, 1);
int pixelTL;
byte offset;
//need to set vState.channelWidth and vState.channelHeight correctly, I think....
vState.channels[0] = new byte[c.getNumChunks()];
vState.channelWidth = c.getChunksWide();
vState.channelHeight = c.getChunksHigh();
for (int i = 0; i < c.getNumChunks(); i++)
{
pixelTL = c.chunkIndexToPixelIndex(i);
//find best match given search area
offset = findOffsetVector(chNew[0], chOld[0], pixelTL, state.channelWidth);
//save best match vector
vState.channels[0][i] = offset;
//update channels to be difference.
if (i == 20)
{
i = 20;
}
setDiff(state.channels[0], chNew[0], chOld[0], pixelTL, offset, state.channelWidth);
}
//Do the second two channels
Size smaller = Subsample.deduceCbCrSize(state);
c = new Chunker(chunkSize, smaller.Width, smaller.Height, smaller.Width, 1);
vState.channels[1] = new byte[c.getNumChunks()];
vState.channels[2] = new byte[c.getNumChunks()];
for (int i = 0; i < c.getNumChunks(); i++)
{
pixelTL = c.chunkIndexToPixelIndex(i);
offset = findOffsetVector(chNew[1], chOld[1], pixelTL, smaller.Width);
vState.channels[1][i] = offset;
setDiff(state.channels[1], chNew[1], chOld[1], pixelTL, offset, smaller.Width);
//offset = findOffsetVector(state.channels[2], channels[2], pixelTL, state.channelWidth);
//Just use the same vectors for channel 3 as channel 2. Probably okay.
vState.channels[2][i] = offset;
setDiff(state.channels[2], chNew[2], chOld[2], pixelTL, offset, smaller.Width);
}
}
private void padChannels()
{
//pad the size
Size ySize = new Size(state.channelWidth, state.channelHeight);
Size brOldSize = Subsample.deduceCbCrSize(state);
Size brNewSize = Subsample.getPaddedCbCrSize(ySize, state.samplingMode);
if (ySize.Width % 8 != 0)
{
ySize.Width += 8 - (ySize.Width % 8);
}
if (ySize.Height % 8 != 0)
{
ySize.Height += 8 - (ySize.Height % 8);
}
//create padded container
byte[][] newChannels = new byte[3][];
newChannels[0] = new byte[ySize.Width * ySize.Height];
newChannels[1] = new byte[brNewSize.Width * brNewSize.Height];
newChannels[2] = new byte[newChannels[1].Length];
//copy array into larger container
for (int y = 0; y < state.channelHeight; y++)
{
Array.Copy(state.channels[0], y * state.channelWidth, newChannels[0], y * ySize.Width, state.channelWidth);
}
for (int y = 0; y < brOldSize.Height; y++)
{
Array.Copy(state.channels[1], y * brOldSize.Width, newChannels[1], y * brNewSize.Width, brOldSize.Width);
Array.Copy(state.channels[2], y * brOldSize.Width, newChannels[2], y * brNewSize.Width, brOldSize.Width);
for (int x = brOldSize.Width; x < brNewSize.Width; x++)
{
newChannels[1][y * brNewSize.Width + x] = 127;
newChannels[2][y * brNewSize.Width + x] = 127;
}
}
//update state
state.channelWidth = ySize.Width;
state.channelHeight = ySize.Height;
state.channels = newChannels;
}
protected override void clean()
{
base.clean();
if (state == null || state.channels == null)
{
return;
}
if (!isInverse)
{
state.quantizeQuality = properties["quality"].nValue;
}
generateQTables(state.quantizeQuality);
padChannels();
Chunker c = new Chunker(chunkSize, state.channelWidth, state.channelHeight, state.channelWidth, 1);
byte[] data = new byte[chunkSize * chunkSize];
for (int i = 0; i < c.getNumChunks(); i++)
{
c.getBlock(state.channels[0], data, i);
data = isInverse ? doIDCT(data, quantizationY) : doDCT(data, quantizationY);
c.setBlock(state.channels[0], data, i);
}
Size tempS = Subsample.getPaddedCbCrSize(new Size(state.channelWidth, state.channelHeight), state.samplingMode);
c = new Chunker(chunkSize, tempS.Width, tempS.Height, tempS.Width, 1);
for (int i = 0; i < c.getNumChunks(); i++)
{
c.getBlock(state.channels[1], data, i);
data = isInverse ? doIDCT(data, quantizationC) : doDCT(data, quantizationC);
c.setBlock(state.channels[1], data, i);
c.getBlock(state.channels[2], data, i);
data = isInverse ? doIDCT(data, quantizationC) : doDCT(data, quantizationC);
c.setBlock(state.channels[2], data, i);
}
}
private void open(object sender, EventArgs e)
{
soil();
clean();
state = new DataBlob();
state.type = DataBlob.Type.Channels;
state.channels = new byte[3][];
using (Stream stream = new FileStream(inPath, FileMode.Open, FileAccess.Read, FileShare.Read)) {
using (BinaryReader reader = new BinaryReader(stream, Encoding.Default)) {
state.imageWidth = reader.ReadUInt16();
state.imageHeight = reader.ReadUInt16();
state.channelWidth = reader.ReadUInt16();
state.channelHeight = reader.ReadUInt16();
state.quantizeQuality = reader.ReadByte();
state.samplingMode = (DataBlob.Samples)reader.ReadByte();
state.channels[0] = new byte[state.channelWidth * state.channelHeight];
byte[] data = new byte[64];
byte count, val;
//======================
//===== Y Channel ======
//======================
Chunker c = new Chunker(8, state.channelWidth, state.channelHeight, state.channelWidth, 1);
var indexer = Chunker.zigZag8Index();
for (int iChunk = 0; iChunk < c.getNumChunks(); iChunk++)
{
for (int iPixel = 0; iPixel < 64;)
{
val = reader.ReadByte();
if (val != rleToken)
{
data[iPixel++] = val;
}
else
{
count = reader.ReadByte();
val = reader.ReadByte();
while (count > 0)
{
data[iPixel++] = val;
count--;
}
}
}
c.setZigZag8Block(state.channels[0], data, iChunk);
}
//===========================
//===== Cr, Cb Channels =====
//===========================
Size len = Subsample.getPaddedCbCrSize(new Size(state.channelWidth, state.channelHeight), state.samplingMode);
state.channels[1] = new byte[len.Width * len.Height];
state.channels[2] = new byte[state.channels[1].Length];
c = new Chunker(8, len.Width, len.Height, len.Width, 1);
indexer = Chunker.zigZag8Index();
for (int channel = 1; channel < state.channels.Length; channel++)
{
for (int iChunk = 0; iChunk < c.getNumChunks(); iChunk++)
{
for (int iPixel = 0; iPixel < 64;)
{
val = reader.ReadByte();
if (val != rleToken)
{
data[iPixel++] = val;
}
else
{
count = reader.ReadByte();
val = reader.ReadByte();
while (count > 0)
{
data[iPixel++] = val;
count--;
}
}
}
c.setZigZag8Block(state.channels[channel], data, iChunk);
}
}
}
} //close file
}
public static Bitmap channelsToBitmap(DataBlob data)
{
if (data == null || data.channels == null)
{
return(null);
}
Bitmap bmp = new Bitmap(data.imageWidth, data.imageHeight, PixelFormat.Format24bppRgb);
BitmapData bmpData = bmp.LockBits(
new Rectangle(0, 0, bmp.Width, bmp.Height),
ImageLockMode.ReadWrite,
bmp.PixelFormat);
IntPtr ptr = bmpData.Scan0;
//copy bytes
int nBytes = Math.Abs(bmpData.Stride) * bmp.Height;
byte[] rgbValues = new byte[nBytes];
System.Runtime.InteropServices.Marshal.Copy(ptr, rgbValues, 0, nBytes);
int pixel;
int iY, iCrb;
int channelYStride = data.channelWidth;
//TODO: don't assume padded. :P
int channelCRBStride = Subsample.getCbCrStride(data);
for (int y = 0; y < data.imageHeight; y++)
{
pixel = y * bmpData.Stride;
iY = y * channelYStride;
iCrb = (data.samplingMode == DataBlob.Samples.s420 ? y / 2 : y) * channelCRBStride;
for (int x = 0; x < data.imageWidth; x++)
{
rgbValues[pixel + 2] = data.channels[0][iY];
rgbValues[pixel + 1] = data.channels[1][iCrb];
rgbValues[pixel] = data.channels[2][iCrb];
pixel += 3;
iY++;
if (data.samplingMode == DataBlob.Samples.s420 || data.samplingMode == DataBlob.Samples.s422)
{
if (x % 2 == 1)
{
iCrb++;
}
}
else if (data.samplingMode == DataBlob.Samples.s444)
{
iCrb++;
}
else if (data.samplingMode == DataBlob.Samples.s411)
{
if (x % 4 == 3)
{
iCrb++;
}
}
}
}
System.Runtime.InteropServices.Marshal.Copy(rgbValues, 0, ptr, nBytes);
bmp.UnlockBits(bmpData);
return(bmp);
}
