public void SkipBytes(int bytes)
{
int blocks = (bytes / BufSize) * BufSize;
input.ReadBytes(blocks);
for (int i = blocks; i < bytes; i++)
GetBits(8);
}
/* This will attempt to parse makernotes and return it as an IFD */
//makernote should be self contained
Makernote ParseMakerNote(ImageBinaryReader reader, Tag tag, Endianness parentEndian)
{
//read twice the makernote lenght, should be enough
reader.BaseStream.Position = tag.dataOffset + RelativeOffset;
byte[] data = reader.ReadBytes((int)Math.Min(tag.dataCount * 3, reader.BaseStream.Length));
return(ParseMakerNote(data, parentEndian, (int)tag.dataOffset));
}
public static void Decode10BitRaw(ImageBinaryReader input, Point2D size, Point2D offset, Image <ushort> rawImage)
{
int off = (int)(size.width * 10) / 8;
var pumps = new byte[size.height][];
//read the data
for (int i = 0; i < size.height; i++)
{
pumps[i] = input.ReadBytes(off);
}
Parallel.For(0, size.height, i =>
{
long pos = (i + offset.height) * rawImage.fullSize.dim.width + offset.width;
var data = pumps[i];
var bytePos = 0;
for (uint x = 0; x < size.width;)
{
rawImage.fullSize.rawView[pos + x++] = (ushort)((data[bytePos++] << 2) + (data[bytePos] >> 6));
rawImage.fullSize.rawView[pos + x++] = (ushort)(((data[bytePos++] & 63) << 4) + (data[bytePos] >> 4));
rawImage.fullSize.rawView[pos + x++] = (ushort)(((data[bytePos++] & 15) << 6) + (data[bytePos] >> 2));
rawImage.fullSize.rawView[pos + x++] = (ushort)(((data[bytePos++] & 3) << 8) + data[bytePos++]);
}
pumps[i] = null;
});
}
internal PanaBitpump(ImageBinaryReader _input, uint load)
{
var temp = _input.ReadBytes((int)_input.RemainingSize);
Array.Resize(ref temp, temp.Length + 32);
input = new ImageBinaryReader(temp);
vbits = 0;
load_flags = (int)load;
}
public static void Decode8BitRaw(ImageBinaryReader input, Point2D size, Point2D offset, Image <ushort> rawImage)
{
var temp = input.ReadBytes((int)size.Area);
Parallel.For(0, size.height, y =>
{
var skip = (y + offset.height) * rawImage.fullSize.UncroppedDim.width + offset.width;
for (int x = 0; x < size.width; x++)
{
rawImage.fullSize.rawView[skip + x] = temp[skip + x];
}
});
}
public Tag(ImageBinaryReader fileStream, int baseOffset)
{
parent_offset = baseOffset;
TagId = (TagType)fileStream.ReadUInt16();
dataType = (TiffDataType)fileStream.ReadUInt16();
if (TagId == TagType.FUJI_RAW_IFD)
{
if (dataType == TiffDataType.OFFSET) // FUJI - correct type
{
dataType = TiffDataType.LONG;
}
}
dataCount = fileStream.ReadUInt32();
dataOffset = 0;
if (((dataCount * dataType.GetTypeSize() > 4)))
{
dataOffset = fileStream.ReadUInt32();
}
else
{
GetData(fileStream);
int k = (int)dataCount * dataType.GetTypeSize();
if (k < 4)
{
fileStream.ReadBytes(4 - k);
}
}
/* if (dataOffset < fileStream.BaseStream.Length && dataOffset > 1)
* {
* long firstPosition = fileStream.Position;
* fileStream.Position = dataOffset + parent_offset;
* GetData(fileStream);
* fileStream.BaseStream.Position = firstPosition;
* ¨*/
}
void DecodeARW2(ImageBinaryReader input, long w, long h, int bpp)
{
input.Position = 0;
if (bpp == 8)
{
// Since ARW2 compressed images have predictable offsets, we decode them threaded
BitPumpPlain bits = new BitPumpPlain(reader);
//todo add parralel (parrallel.For not working because onlyone bits so not thread safe;
//set one bits pump per row (may be slower)
for (uint y = 0; y < rawImage.fullSize.dim.height; y++)
{
// Realign
bits.Offset = (int)(rawImage.fullSize.dim.width * 8 * y) >> 3;
uint random = bits.PeekBits(24);
// Process 32 pixels (16x2) per loop.
for (uint x = 0; x < rawImage.fullSize.dim.width - 30;)
{
int _max = (int)bits.GetBits(11);
int _min = (int)bits.GetBits(11);
int _imax = (int)bits.GetBits(4);
int _imin = (int)bits.GetBits(4);
int sh;
for (sh = 0; sh < 4 && 0x80 << sh <= _max - _min; sh++)
{
;
}
for (int i = 0; i < 16; i++)
{
int p;
if (i == _imax)
{
p = _max;
}
else if (i == _imin)
{
p = _min;
}
else
{
p = (int)(bits.GetBits(7) << sh) + _min;
if (p > 0x7ff)
{
p = 0x7ff;
}
}
rawImage.SetWithLookUp((ushort)(p << 1), rawImage.fullSize.rawView, (int)((y * rawImage.fullSize.dim.width) + x + i * 2), ref random);
}
x += (x & 1) != 0 ? (uint)31 : 1; // Skip to next 32 pixels
}
}
}
else if (bpp == 12)
{
byte[] inputTempArray = input.ReadBytes((int)input.BaseStream.Length);
if (input.RemainingSize < (w * 3 / 2))
{
throw new RawDecoderException("Sony Decoder: Image data section too small, file probably truncated");
}
if (input.RemainingSize < (w * h * 3 / 2))
{
h = input.RemainingSize / (w * 3 / 2) - 1;
}
int i = 0;
for (uint y = 0; y < h; y++)
{
for (uint x = 0; x < w; x += 2)
{
uint g1 = inputTempArray[i++];
uint g2 = inputTempArray[i++];
rawImage.fullSize.rawView[y * rawImage.fullSize.dim.width + x] = (ushort)(g1 | ((g2 & 0xf) << 8));
uint g3 = inputTempArray[i++];
rawImage.fullSize.rawView[y * rawImage.fullSize.dim.width + x + 1] = (ushort)((g2 >> 4) | (g3 << 4));
}
}
}
else
{
throw new RawDecoderException("Unsupported bit depth");
}
}
public void DecodeSlice()
{
//first read data for each slice
for (int i = 0; i < slices.Count; i++)
{
file.BaseStream.Position = slices[i].byteOffset;
slices[i].data = file.ReadBytes((int)slices[i].byteCount);
}
Parallel.For(0, slices.Count, (i) =>
{
DngSliceElement e = slices[i];
LJPEGPlain l = new LJPEGPlain(e.data, raw, e.mUseBigtable, FixLjpeg)
{
offX = e.offX,
offY = e.offY
};
l.StartDecoder(0, e.byteCount);
l.input.Dispose();
});
/* Lossy DNG
*
* // Each slice is a JPEG image
* struct jpeg_decompress_struct dinfo;
* struct jpeg_error_mgr jerr;
* while (!t.slices.empty()) {
* DngSliceEleqment e = t.slices.front();
* t.slices.pop();
* byte* complete_buffer = null;
* JSAMPARRAY buffer = (JSAMPARRAY)malloc(sizeof(JSAMPROW));
*
* try {
* jpeg_create_decompress(&dinfo);
* dinfo.err = jpeg_std_error(&jerr);
* jerr.error_exit = my_error_throw;
* JPEG_MEMSRC(&dinfo, (unsigned char*)mFile.getData(e.byteOffset, e.byteCount), e.byteCount);
*
* if (JPEG_HEADER_OK != jpeg_read_header(&dinfo, true))
* ThrowRDE("DngDecoderSlices: Unable to read JPEG header");
*
* jpeg_start_decompress(&dinfo);
* if (dinfo.output_components != (int) mRaw.getCpp())
* ThrowRDE("DngDecoderSlices: Component count doesn't match");
* int row_stride = dinfo.output_width * dinfo.output_components;
* int pic_size = dinfo.output_height * row_stride;
* complete_buffer = (byte8*) _aligned_malloc(pic_size, 16);
* while (dinfo.output_scanline<dinfo.output_height) {
* buffer[0] = (JSAMPROW) (&complete_buffer[dinfo.output_scanline * row_stride]);
* if (0 == jpeg_read_scanlines(&dinfo, buffer, 1))
* ThrowRDE("DngDecoderSlices: JPEG Error while decompressing image.");
* }
* jpeg_finish_decompress(&dinfo);
*
* // Now the image is decoded, and we copy the image data
* int copy_w = Math.Math.Min(((mraw.raw.dim.x - e.offX, dinfo.output_width);
* int copy_h = Math.Math.Min(((mraw.raw.dim.y - e.offY, dinfo.output_height);
* for (int y = 0; y<copy_h; y++) {
* byte[] src = &complete_buffer[row_stride * y];
* UInt16* dst = (UInt16*)mRaw.getData(e.offX, y + e.offY);
* for (int x = 0; x<copy_w; x++) {
* for (int c=0; c<dinfo.output_components; c++)
* dst++ = (* src++);
* }
* }
* } catch (RawDecoderException &err) {
* mRaw.setError(err.what());
* } catch (IOException &err) {
* mRaw.setError(err.what());
* }
* free(buffer);
* if (complete_buffer)
* _aligned_free(complete_buffer);
* jpeg_destroy_decompress(&dinfo);
* }
* }*/
}
public void Decompress(ImageBinaryReader metadata, uint offset, uint size)
{
metadata.Position = 0;
byte v0 = metadata.ReadByte();
byte v1 = metadata.ReadByte();
int huffSelect = 0;
uint split = 0;
var pUp1 = new int[2];
var pUp2 = new int[2];
huff[0].UseBigTable = true;
if (v0 == 73 || v1 == 88)
{
metadata.ReadBytes(2110);
}
if (v0 == 70)
{
huffSelect = 2;
}
if (raw.fullSize.ColorDepth == 14)
{
huffSelect += 3;
}
pUp1[0] = metadata.ReadInt16();
pUp1[1] = metadata.ReadInt16();
pUp2[0] = metadata.ReadInt16();
pUp2[1] = metadata.ReadInt16();
int max = 1 << raw.fullSize.ColorDepth & 0x7fff;
int step = 0, csize = metadata.ReadUInt16();
if (csize > 1)
{
step = max / (csize - 1);
}
if (v0 == 68 && v1 == 32 && step > 0)
{
for (int i = 0; i < csize; i++)
{
curve[i * step] = metadata.ReadUInt16();
}
for (int i = 0; i < max; i++)
{
curve[i] = (ushort)((curve[i - i % step] * (step - i % step) + curve[i - i % step + step] * (i % step)) / step);
}
metadata.Position = (562);
split = metadata.ReadUInt16();
}
else if (v0 != 70 && csize <= 0x4001)
{
for (int i = 0; i < csize; i++)
{
curve[i] = metadata.ReadUInt16();
}
max = csize;
}
huff[0].Create(huffSelect);
raw.whitePoint = curve[max - 1];
raw.black = curve[0];
raw.table = new TableLookUp(curve, max, true);
huff[0].bitPump = new BitPumpMSB(input, offset, size);
int pLeft1 = 0, pLeft2 = 0;
uint random = huff[0].bitPump.PeekBits(24);
for (int y = 0; y < raw.fullSize.dim.height; y++)
{
if (split != 0 && (y == split))
{
huff[0].Create(huffSelect + 1);
}
pUp1[y & 1] += huff[0].Decode();
pUp2[y & 1] += huff[0].Decode();
pLeft1 = pUp1[y & 1];
pLeft2 = pUp2[y & 1];
long dest = y * raw.fullSize.dim.width;
raw.SetWithLookUp((ushort)pLeft1, raw.fullSize.rawView, dest++, ref random);
raw.SetWithLookUp((ushort)pLeft2, raw.fullSize.rawView, dest++, ref random);
for (int x = 1; x < raw.fullSize.dim.width / 2; x++)
{
pLeft1 += huff[0].Decode();
pLeft2 += huff[0].Decode();
raw.SetWithLookUp((ushort)pLeft1, raw.fullSize.rawView, dest++, ref random);
raw.SetWithLookUp((ushort)pLeft2, raw.fullSize.rawView, dest++, ref random);
}
}
raw.table = null;
}
/* This is probably the slowest decoder of them all.
* I cannot see any way to effectively speed up the prediction
* phase, which is by far the slowest part of this algorithm.
* Also there is no way to multithread this code, since prediction
* is based on the output of all previous pixel (bar the first four)
*/
private void DecodeCompressed(ImageBinaryReader s, uint width, uint height)
{
int nbits;
long left0, nw0, left1, nw1;
long sign, low, high;
long[] acarry0 = new long[3], acarry1 = new long[3];
long pred, diff;
//uint pitch = rawImage.pitch;
/* Build a table to quickly look up "high" value */
byte[] bittable = new byte[4096];
for (int i = 0; i < 4096; i++)
{
int b = i;
for (high = 0; high < 12; high++)
{
if (((b >> (11 - (int)high)) & 1) != 0)
{
break;
}
}
bittable[i] = (byte)Math.Min(12, high);
}
left0 = nw0 = left1 = nw1 = 0;
s.ReadBytes(7);
BitPumpMSB bits = new BitPumpMSB(s);
for (int y = 0; y < height; y++)
{
var pos = y * rawImage.fullSize.UncroppedDim.width;
acarry0 = new long[3];
acarry1 = new long[3];
bool y_border = y < 2;
bool border = true;
for (int x = 0; x < width; x++)
{
bits.Fill();
int i = 0;
if (acarry0[2] < 3)
{
i = 2;
}
for (nbits = 2 + i; acarry0[0] >> (nbits + i) != 0; nbits++)
{
;
}
uint b = bits.PeekBits(15);
sign = (b >> 14) * -1;
low = (b >> 12) & 3;
high = bittable[b & 4095];
// Skip bytes used above or read bits
if (high == 12)
{
bits.SkipBits(15);
high = bits.GetBits(16 - nbits) >> 1;
}
else
{
bits.SkipBits((int)high + 1 + 3);
}
acarry0[0] = (high << nbits) | bits.GetBits(nbits);
diff = (acarry0[0] ^ sign) + acarry0[1];
acarry0[1] = (diff * 3 + acarry0[1]) >> 5;
acarry0[2] = acarry0[0] > 16 ? 0 : acarry0[2] + 1;
if (border)
{
if (y_border && x < 2)
{
pred = 0;
}
else if (y_border)
{
pred = left0;
}
else
{
pred = nw0 = rawImage.fullSize.rawView[pos - rawImage.fullSize.UncroppedDim.width + x];
}
rawImage.fullSize.rawView[pos + x] = (ushort)(pred + ((diff << 2) | low));
// Set predictor
left0 = rawImage.fullSize.rawView[pos + x];
}
else
{
// Have local variables for values used several tiles
// (having a "UInt16 *dst_up" that caches dest[-pitch+((int)x)] is actually slower, probably stack spill or aliasing)
int up = rawImage.fullSize.rawView[pos - rawImage.fullSize.UncroppedDim.width + x];
long leftMinusNw = left0 - nw0;
long upMinusNw = up - nw0;
// Check if sign is different, and one is not zero
if (leftMinusNw * upMinusNw < 0)
{
if (Other_abs(leftMinusNw) > 32 || Other_abs(upMinusNw) > 32)
{
pred = left0 + upMinusNw;
}
else
{
pred = (left0 + up) >> 1;
}
}
else
{
pred = Other_abs(leftMinusNw) > Other_abs(upMinusNw) ? left0 : up;
}
rawImage.fullSize.rawView[pos + x] = (ushort)(pred + ((diff << 2) | low));
// Set predictors
left0 = rawImage.fullSize.rawView[pos + x];
nw0 = up;
}
// ODD PIXELS
x += 1;
bits.Fill();
i = 0;
if (acarry1[2] < 3)
{
i = 2;
}
for (nbits = 2 + i; acarry1[0] >> (nbits + i) != 0; nbits++)
{
;
}
b = bits.PeekBits(15);
sign = (b >> 14) * -1;
low = (b >> 12) & 3;
high = bittable[b & 4095];
// Skip bytes used above or read bits
if (high == 12)
{
bits.SkipBits(15);
high = bits.GetBits(16 - nbits) >> 1;
}
else
{
bits.SkipBits((int)high + 1 + 3);
}
acarry1[0] = (high << nbits) | bits.GetBits(nbits);
diff = (acarry1[0] ^ sign) + acarry1[1];
acarry1[1] = (diff * 3 + acarry1[1]) >> 5;
acarry1[2] = acarry1[0] > 16 ? 0 : acarry1[2] + 1;
if (border)
{
if (y_border && x < 2)
{
pred = 0;
}
else if (y_border)
{
pred = left1;
}
else
{
pred = nw1 = rawImage.fullSize.rawView[pos - rawImage.fullSize.UncroppedDim.width + x];
}
rawImage.fullSize.rawView[pos + x] = (ushort)(left1 = pred + ((diff << 2) | low));
}
else
{
int up = rawImage.fullSize.rawView[pos - rawImage.fullSize.UncroppedDim.width + x];
long leftminusNw = left1 - nw1;
long upminusNw = up - nw1;
// Check if sign is different, and one is not zero
if (leftminusNw * upminusNw < 0)
{
if (Other_abs(leftminusNw) > 32 || Other_abs(upminusNw) > 32)
{
pred = left1 + upminusNw;
}
else
{
pred = (left1 + up) >> 1;
}
}
else
{
pred = Other_abs(leftminusNw) > Other_abs(upminusNw) ? left1 : up;
}
rawImage.fullSize.rawView[pos + x] = (ushort)(left1 = pred + ((diff << 2) | low));
nw1 = up;
}
border = y_border;
}
}
}
public void ParseSOS()
{
if (!frame.Initialized)
{
throw new RawDecoderException("Frame not yet initialized (SOF Marker not parsed)");
}
input.ReadInt16();
uint soscps = input.ReadByte();
if (frame.numComponents != soscps)
{
throw new RawDecoderException("Component number mismatch.");
}
for (int i = 0; i < frame.numComponents; i++)
{
uint cs = input.ReadByte();
uint count = 0; // Find the correct component
while (frame.ComponentInfo[count].componentId != cs)
{
if (count >= frame.numComponents)
{
throw new RawDecoderException("Invalid Component Selector");
}
count++;
}
uint b1 = input.ReadByte();
uint td = b1 >> 4;
if (td > 3)
{
throw new RawDecoderException("Invalid Huffman table selection");
}
if (!huff[td].Initialized)
{
throw new RawDecoderException("Invalid Huffman table selection, not defined.");
}
if (count > 3)
{
throw new RawDecoderException("Component count out of range");
}
frame.ComponentInfo[count].dcTblNo = td;
}
predictor = input.ReadByte();
if (predictor > 7)
{
throw new RawDecoderException("Invalid predictor mode.");
}
input.ReadBytes(1); // Se + Ah Not used in LJPEG
int b = input.ReadByte();
Pt = b & 0xf; // Point Transform
bits = new BitPumpJPEG(input);
for (int i = 0; i < huff.Length; i++)
{
huff[i].bitPump = bits;
huff[i].precision = frame.precision;
}
DecodeScan();
input.Position = bits.Offset;
}