void LJpegPlain::decodeScan() {
// If image attempts to decode beyond the image bounds, strip it.
if ((frame.w * frame.cps + offX * mRaw->getCpp()) > mRaw->dim.x * mRaw->getCpp())
skipX = ((frame.w * frame.cps + offX * mRaw->getCpp()) - mRaw->dim.x * mRaw->getCpp()) / frame.cps;
if (frame.h + offY > (uint32)mRaw->dim.y)
skipY = frame.h + offY - mRaw->dim.y;
_RPT1(0,"SlicesW:0x%x,\n",&slicesW);
_RPT1(0,"Slices:%d\n",slicesW.size());
if (slicesW.empty())
slicesW.push_back(frame.w*frame.cps);
if ( 0 == frame.h || 0 == frame.w)
ThrowRDE("LJpegPlain::decodeScan: Image width or height set to zero");
for (uint32 i = 0; i < frame.cps; i++) {
if (frame.compInfo[i].superH != 1 || frame.compInfo[i].superV != 1) {
if (mRaw->isCFA)
ThrowRDE("LJpegDecompressor::decodeScan: Cannot decode subsampled image to CFA data");
if (mRaw->getCpp() != frame.cps)
ThrowRDE("LJpegDecompressor::decodeScan: Subsampled component count does not match image.");
if (pred == 1) {
if (frame.compInfo[0].superH == 2 && frame.compInfo[0].superV == 2 &&
frame.compInfo[1].superH == 1 && frame.compInfo[1].superV == 1 &&
frame.compInfo[2].superH == 1 && frame.compInfo[2].superV == 1) {
// Something like Cr2 sRaw1, use fast decoder
decodeScanLeft4_2_0();
return;
} else if (frame.compInfo[0].superH == 2 && frame.compInfo[0].superV == 1 &&
frame.compInfo[1].superH == 1 && frame.compInfo[1].superV == 1 &&
frame.compInfo[2].superH == 1 && frame.compInfo[2].superV == 1) {
// Something like Cr2 sRaw2, use fast decoder
decodeScanLeft4_2_2();
return;
} else {
decodeScanLeftGeneric();
return;
}
} else {
ThrowRDE("LJpegDecompressor::decodeScan: Unsupported prediction direction.");
}
}
}
if (pred == 1) {
if (frame.cps == 2)
decodeScanLeft2Comps();
else if (frame.cps == 3)
decodeScanLeft3Comps();
else if (frame.cps == 4)
decodeScanLeft4Comps();
else
ThrowRDE("LJpegDecompressor::decodeScan: Unsupported component direction count.");
return;
}
ThrowRDE("LJpegDecompressor::decodeScan: Unsupported prediction direction.");
}
void LJpegPlain::decodeScan() {
// Fix for Canon 6D mRaw, which has flipped width & height for some part of the image
// We temporarily swap width and height for cropping.
if (mCanonFlipDim) {
uint32 w = frame.w;
frame.w = frame.h;
frame.h = w;
}
// If image attempts to decode beyond the image bounds, strip it.
if ((frame.w * frame.cps + offX * mRaw->getCpp()) > mRaw->dim.x * mRaw->getCpp())
skipX = ((frame.w * frame.cps + offX * mRaw->getCpp()) - mRaw->dim.x * mRaw->getCpp()) / frame.cps;
if (frame.h + offY > (uint32)mRaw->dim.y)
skipY = frame.h + offY - mRaw->dim.y;
// Swap back (see above)
if (mCanonFlipDim) {
uint32 w = frame.w;
frame.w = frame.h;
frame.h = w;
}
/* Correct wrong slice count (Canon G16) */
if (slicesW.size() == 1)
slicesW[0] = frame.w * frame.cps;
if (slicesW.empty())
slicesW.push_back(frame.w*frame.cps);
if ( 0 == frame.h || 0 == frame.w)
ThrowRDE("LJpegPlain::decodeScan: Image width or height set to zero");
for (uint32 i = 0; i < frame.cps; i++) {
if (frame.compInfo[i].superH != 1 || frame.compInfo[i].superV != 1) {
if (mRaw->isCFA)
ThrowRDE("LJpegDecompressor::decodeScan: Cannot decode subsampled image to CFA data");
if (mRaw->getCpp() != frame.cps)
ThrowRDE("LJpegDecompressor::decodeScan: Subsampled component count does not match image.");
if (pred == 1) {
if (frame.compInfo[0].superH == 2 && frame.compInfo[0].superV == 2 &&
frame.compInfo[1].superH == 1 && frame.compInfo[1].superV == 1 &&
frame.compInfo[2].superH == 1 && frame.compInfo[2].superV == 1) {
// Something like Cr2 sRaw1, use fast decoder
decodeScanLeft4_2_0();
return;
} else if (frame.compInfo[0].superH == 2 && frame.compInfo[0].superV == 1 &&
frame.compInfo[1].superH == 1 && frame.compInfo[1].superV == 1 &&
frame.compInfo[2].superH == 1 && frame.compInfo[2].superV == 1) {
// Something like Cr2 sRaw2, use fast decoder
if (mCanonFlipDim)
ThrowRDE("LJpegDecompressor::decodeScan: Cannot flip non 4:2:2 subsampled images.");
decodeScanLeft4_2_2();
return;
} else {
ThrowRDE("LJpegDecompressor::decodeScan: Unsupported subsampling");
decodeScanLeftGeneric();
return;
}
} else {
ThrowRDE("LJpegDecompressor::decodeScan: Unsupported prediction direction.");
}
}
}
if (pred == 1) {
if (mCanonFlipDim)
ThrowRDE("LJpegDecompressor::decodeScan: Cannot flip non subsampled images.");
if (frame.cps == 2)
decodeScanLeft2Comps();
else if (frame.cps == 3)
decodeScanLeft3Comps();
else if (frame.cps == 4)
decodeScanLeft4Comps();
else
ThrowRDE("LJpegDecompressor::decodeScan: Unsupported component direction count.");
return;
}
ThrowRDE("LJpegDecompressor::decodeScan: Unsupported prediction direction.");
}