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XnStreamCompression.cpp
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1275 lines (1013 loc) · 30.3 KB
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/*****************************************************************************
* *
* PrimeSense Sensor 5.0 Alpha *
* Copyright (C) 2010 PrimeSense Ltd. *
* *
* This file is part of PrimeSense Common. *
* *
* PrimeSense Sensor is free software: you can redistribute it and/or modify *
* it under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* PrimeSense Sensor is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with PrimeSense Sensor. If not, see <http://www.gnu.org/licenses/>. *
* *
*****************************************************************************/
//---------------------------------------------------------------------------
// Includes
//---------------------------------------------------------------------------
#include "XnStreamCompression.h"
#include <XnStatus.h>
#include <jerror.h>
#include <XnLog.h>
//---------------------------------------------------------------------------
// Code
//---------------------------------------------------------------------------
XN_FORMATS_API XnStatus XnStreamCompressDepth16Z(const XnUInt16* pInput, const XnUInt32 nInputSize, XnUInt8* pOutput, XnUInt32* pnOutputSize)
{
// Local function variables
const XnUInt16* pInputEnd = pInput + (nInputSize / sizeof(XnUInt16));
XnUInt8* pOrigOutput = pOutput;
XnUInt16 nCurrValue = 0;
XnUInt16 nLastValue = 0;
XnUInt16 nAbsDiffValue = 0;
XnInt16 nDiffValue = 0;
XnUInt8 cOutStage = 0;
XnUInt8 cOutChar = 0;
XnUInt8 cZeroCounter = 0;
// Note: this function does not make sure it stay within the output memory boundaries!
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(pInput);
XN_VALIDATE_INPUT_PTR(pOutput);
XN_VALIDATE_INPUT_PTR(pnOutputSize);
if (nInputSize == 0)
{
*pnOutputSize = 0;
return XN_STATUS_OK;
}
// Encode the data...
nLastValue = *pInput;
*(XnUInt16*)pOutput = nLastValue;
pInput++;
pOutput+=2;
while (pInput != pInputEnd)
{
nCurrValue = *pInput;
nDiffValue = (nLastValue - nCurrValue);
nAbsDiffValue = abs(nDiffValue);
if (nAbsDiffValue <= 6)
{
nDiffValue += 6;
if (cOutStage == 0)
{
cOutChar = nDiffValue << 4;
cOutStage = 1;
}
else
{
cOutChar += nDiffValue;
if (cOutChar == 0x66)
{
cZeroCounter++;
if (cZeroCounter == 15)
{
*pOutput = 0xEF;
pOutput++;
cZeroCounter = 0;
}
}
else
{
if (cZeroCounter != 0)
{
*pOutput = 0xE0 + cZeroCounter;
pOutput++;
cZeroCounter = 0;
}
*pOutput = cOutChar;
pOutput++;
}
cOutStage = 0;
}
}
else
{
if (cZeroCounter != 0)
{
*pOutput = 0xE0 + cZeroCounter;
pOutput++;
cZeroCounter = 0;
}
if (cOutStage == 0)
{
cOutChar = 0xFF;
}
else
{
cOutChar += 0x0F;
cOutStage = 0;
}
*pOutput = cOutChar;
pOutput++;
if (nAbsDiffValue <= 63)
{
nDiffValue += 192;
*pOutput = nDiffValue;
pOutput++;
}
else
{
*(XnUInt16*)pOutput = (nCurrValue << 8) + (nCurrValue >> 8);
pOutput+=2;
}
}
nLastValue = nCurrValue;
pInput++;
}
if (cOutStage != 0)
{
*pOutput = cOutChar + 0x0D;
pOutput++;
}
if (cZeroCounter != 0)
{
*pOutput = 0xE0 + cZeroCounter;
pOutput++;
}
*pnOutputSize = pOutput - pOrigOutput;
// All is good...
return (XN_STATUS_OK);
}
XN_FORMATS_API XnStatus XnStreamCompressDepth16ZWithEmbTable(const XnUInt16* pInput, const XnUInt32 nInputSize, XnUInt8* pOutput, XnUInt32* pnOutputSize, XnUInt16 nMaxValue)
{
// Local function variables
const XnUInt16* pInputEnd = pInput + (nInputSize / sizeof(XnUInt16));
const XnUInt16* pOrigInput = pInput;
const XnUInt8* pOrigOutput = pOutput;
XnUInt16 nCurrValue = 0;
XnUInt16 nLastValue = 0;
XnUInt16 nAbsDiffValue = 0;
XnInt16 nDiffValue = 0;
XnUInt8 cOutStage = 0;
XnUInt8 cOutChar = 0;
XnUInt8 cZeroCounter = 0;
static XnUInt16 nEmbTable[XN_MAX_UINT16];
XnUInt16 nEmbTableIdx=0;
// Note: this function does not make sure it stay within the output memory boundaries!
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(pInput);
XN_VALIDATE_INPUT_PTR(pOutput);
XN_VALIDATE_INPUT_PTR(pnOutputSize);
// Create the embedded value translation table...
pOutput+=2;
xnOSMemSet(&nEmbTable[0], 0, nMaxValue*sizeof(XnUInt16));
while (pInput != pInputEnd)
{
nEmbTable[*pInput] = 1;
pInput++;
}
for (XnUInt32 i=0; i<nMaxValue; i++)
{
if (nEmbTable[i] == 1)
{
nEmbTable[i] = nEmbTableIdx;
nEmbTableIdx++;
*(XnUInt16*)pOutput = XN_PREPARE_VAR16_IN_BUFFER(XnUInt16(i));
pOutput+=2;
}
}
*(XnUInt16*)(pOrigOutput) = XN_PREPARE_VAR16_IN_BUFFER(nEmbTableIdx);
// Encode the data...
pInput = pOrigInput;
nLastValue = nEmbTable[*pInput];
*(XnUInt16*)pOutput = XN_PREPARE_VAR16_IN_BUFFER(nLastValue);
pInput++;
pOutput+=2;
// for (XnUInt32 i = 0; i < nEmbTableIdx; i++)
// nEmbTable[i] = XN_PREPARE_VAR16_IN_BUFFER(nEmbTable[i]);
while (pInput < pInputEnd)
{
nCurrValue = nEmbTable[*pInput];
nDiffValue = (nLastValue - nCurrValue);
nAbsDiffValue = abs(nDiffValue);
if (nAbsDiffValue <= 6)
{
nDiffValue += 6;
if (cOutStage == 0)
{
cOutChar = nDiffValue << 4;
cOutStage = 1;
}
else
{
cOutChar += nDiffValue;
if (cOutChar == 0x66)
{
cZeroCounter++;
if (cZeroCounter == 15)
{
*pOutput = 0xEF;
pOutput++;
cZeroCounter = 0;
}
}
else
{
if (cZeroCounter != 0)
{
*pOutput = 0xE0 + cZeroCounter;
pOutput++;
cZeroCounter = 0;
}
*pOutput = cOutChar;
pOutput++;
}
cOutStage = 0;
}
}
else
{
if (cZeroCounter != 0)
{
*pOutput = 0xE0 + cZeroCounter;
pOutput++;
cZeroCounter = 0;
}
if (cOutStage == 0)
{
cOutChar = 0xFF;
}
else
{
cOutChar += 0x0F;
cOutStage = 0;
}
*pOutput = cOutChar;
pOutput++;
if (nAbsDiffValue <= 63)
{
nDiffValue += 192;
*pOutput = nDiffValue;
pOutput++;
}
else
{
*(XnUInt16*)pOutput = XN_PREPARE_VAR16_IN_BUFFER((nCurrValue << 8) + (nCurrValue >> 8));
pOutput+=2;
}
}
nLastValue = nCurrValue;
pInput++;
}
if (cOutStage != 0)
{
*pOutput = cOutChar + 0x0D;
pOutput++;
}
if (cZeroCounter != 0)
{
*pOutput = 0xE0 + cZeroCounter;
pOutput++;
}
*pnOutputSize = pOutput - pOrigOutput;
// All is good...
return (XN_STATUS_OK);
}
XN_FORMATS_API XnStatus XnStreamUncompressDepth16Z(const XnUInt8* pInput, const XnUInt32 nInputSize, XnUInt16* pOutput, XnUInt32* pnOutputSize)
{
// Local function variables
const XnUInt8* pInputEnd = pInput + nInputSize;
XnUInt16* pOutputEnd = 0;
const XnUInt16* pOrigOutput = pOutput;
XnUInt16 nLastFullValue = 0;
XnUInt8 cInput = 0;
XnUInt8 cZeroCounter = 0;
XnInt8 cInData1 = 0;
XnInt8 cInData2 = 0;
XnUInt8 cInData3 = 0;
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(pInput);
XN_VALIDATE_INPUT_PTR(pOutput);
XN_VALIDATE_INPUT_PTR(pnOutputSize);
if (nInputSize < sizeof(XnUInt16))
{
return (XN_STATUS_IO_COMPRESSED_BUFFER_TOO_SMALL);
}
pOutputEnd = pOutput + (*pnOutputSize / sizeof(XnUInt16));
// Decode the data...
nLastFullValue = *(XnUInt16*)pInput;
*pOutput = nLastFullValue;
pInput+=2;
pOutput++;
while (pInput != pInputEnd)
{
cInput = *pInput;
if (cInput < 0xE0)
{
cInData1 = cInput >> 4;
cInData2 = (cInput & 0x0f);
nLastFullValue -= (cInData1 - 6);
XN_CHECK_OUTPUT_OVERFLOW(pOutput, pOutputEnd);
*pOutput = nLastFullValue;
pOutput++;
if (cInData2 != 0x0f)
{
if (cInData2 != 0x0d)
{
nLastFullValue -= (cInData2 - 6);
XN_CHECK_OUTPUT_OVERFLOW(pOutput, pOutputEnd);
*pOutput = nLastFullValue;
pOutput++;
}
pInput++;
}
else
{
pInput++;
cInData3 = *pInput;
if (cInData3 & 0x80)
{
nLastFullValue -= (cInData3 - 192);
XN_CHECK_OUTPUT_OVERFLOW(pOutput, pOutputEnd);
*pOutput = nLastFullValue;
pOutput++;
pInput++;
}
else
{
nLastFullValue = cInData3 << 8;
pInput++;
nLastFullValue += *pInput;
XN_CHECK_OUTPUT_OVERFLOW(pOutput, pOutputEnd);
*pOutput = nLastFullValue;
pOutput++;
pInput++;
}
}
}
else if (cInput == 0xFF)
{
pInput++;
cInData3 = *pInput;
if (cInData3 & 0x80)
{
nLastFullValue -= (cInData3 - 192);
XN_CHECK_OUTPUT_OVERFLOW(pOutput, pOutputEnd);
*pOutput = nLastFullValue;
pInput++;
pOutput++;
}
else
{
nLastFullValue = cInData3 << 8;
pInput++;
nLastFullValue += *pInput;
XN_CHECK_OUTPUT_OVERFLOW(pOutput, pOutputEnd);
*pOutput = nLastFullValue;
pInput++;
pOutput++;
}
}
else //It must be 0xE?
{
cZeroCounter = cInput - 0xE0;
while (cZeroCounter != 0)
{
XN_CHECK_OUTPUT_OVERFLOW(pOutput+1, pOutputEnd);
*pOutput = nLastFullValue;
pOutput++;
*pOutput = nLastFullValue;
pOutput++;
cZeroCounter--;
}
pInput++;
}
}
*pnOutputSize = (pOutput - pOrigOutput) * sizeof(XnUInt16);
// All is good...
return (XN_STATUS_OK);
}
XN_FORMATS_API XnStatus XnStreamUncompressDepth16ZWithEmbTable(const XnUInt8* pInput, const XnUInt32 nInputSize, XnUInt16* pOutput, XnUInt32* pnOutputSize)
{
// Local function variables
const XnUInt8* pInputEnd = pInput + nInputSize;
XnUInt16* pOutputEnd = 0;
XnUInt16* pOrigOutput = pOutput;
XnUInt16 nLastFullValue = 0;
XnUInt8 cInput = 0;
XnUInt8 cZeroCounter = 0;
XnInt8 cInData1 = 0;
XnInt8 cInData2 = 0;
XnUInt8 cInData3 = 0;
XnUInt16* pEmbTable = NULL;
XnUInt16 nEmbTableIdx = 0;
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(pInput);
XN_VALIDATE_INPUT_PTR(pOutput);
XN_VALIDATE_INPUT_PTR(pnOutputSize);
if (nInputSize < sizeof(XnUInt16))
{
return (XN_STATUS_IO_COMPRESSED_BUFFER_TOO_SMALL);
}
nEmbTableIdx = XN_PREPARE_VAR16_IN_BUFFER(*(XnUInt16*)pInput);
pInput+=2;
pEmbTable = (XnUInt16*)pInput;
pInput+=nEmbTableIdx * 2;
for (XnUInt32 i = 0; i < nEmbTableIdx; i++)
pEmbTable[i] = XN_PREPARE_VAR16_IN_BUFFER(pEmbTable[i]);
pOutputEnd = pOutput + (*pnOutputSize / sizeof(XnUInt16));
// Decode the data...
nLastFullValue = XN_PREPARE_VAR16_IN_BUFFER(*(XnUInt16*)pInput);
*pOutput = pEmbTable[nLastFullValue];
pInput+=2;
pOutput++;
while (pInput != pInputEnd)
{
cInput = *pInput;
if (cInput < 0xE0)
{
cInData1 = cInput >> 4;
cInData2 = (cInput & 0x0f);
nLastFullValue -= (cInData1 - 6);
XN_CHECK_OUTPUT_OVERFLOW(pOutput, pOutputEnd);
*pOutput = pEmbTable[nLastFullValue];
pOutput++;
if (cInData2 != 0x0f)
{
if (cInData2 != 0x0d)
{
nLastFullValue -= (cInData2 - 6);
XN_CHECK_OUTPUT_OVERFLOW(pOutput, pOutputEnd);
*pOutput = pEmbTable[nLastFullValue];
pOutput++;
}
pInput++;
}
else
{
pInput++;
cInData3 = *pInput;
if (cInData3 & 0x80)
{
nLastFullValue -= (cInData3 - 192);
XN_CHECK_OUTPUT_OVERFLOW(pOutput, pOutputEnd);
*pOutput = pEmbTable[nLastFullValue];
pOutput++;
pInput++;
}
else
{
nLastFullValue = cInData3 << 8;
pInput++;
nLastFullValue += *pInput;
XN_CHECK_OUTPUT_OVERFLOW(pOutput, pOutputEnd);
*pOutput = pEmbTable[nLastFullValue];
pOutput++;
pInput++;
}
}
}
else if (cInput == 0xFF)
{
pInput++;
cInData3 = *pInput;
if (cInData3 & 0x80)
{
nLastFullValue -= (cInData3 - 192);
XN_CHECK_OUTPUT_OVERFLOW(pOutput, pOutputEnd);
*pOutput = pEmbTable[nLastFullValue];
pInput++;
pOutput++;
}
else
{
nLastFullValue = cInData3 << 8;
pInput++;
nLastFullValue += *pInput;
XN_CHECK_OUTPUT_OVERFLOW(pOutput, pOutputEnd);
*pOutput = pEmbTable[nLastFullValue];
pInput++;
pOutput++;
}
}
else //It must be 0xE?
{
cZeroCounter = cInput - 0xE0;
while (cZeroCounter != 0)
{
XN_CHECK_OUTPUT_OVERFLOW(pOutput+1, pOutputEnd);
*pOutput = pEmbTable[nLastFullValue];
pOutput++;
*pOutput = pEmbTable[nLastFullValue];
pOutput++;
cZeroCounter--;
}
pInput++;
}
}
*pnOutputSize = (pOutput - pOrigOutput) * sizeof(XnUInt16);
// All is good...
return (XN_STATUS_OK);
}
XN_FORMATS_API XnStatus XnStreamCompressImage8Z(const XnUInt8* pInput, const XnUInt32 nInputSize, XnUInt8* pOutput, XnUInt32* pnOutputSize)
{
// Local function variables
const XnUInt8* pInputEnd = pInput + nInputSize;
const XnUInt8* pOrigOutput = pOutput;
XnUInt8 nCurrValue = 0;
XnUInt8 nLastValue = 0;
XnUInt8 nAbsDiffValue = 0;
XnInt8 nDiffValue = 0;
XnUInt8 cOutStage = 0;
XnUInt8 cOutChar = 0;
XnUInt8 cZeroCounter = 0;
XnBool bFlag = FALSE;
// Note: this function does not make sure it stay within the output memory boundaries!
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(pInput);
XN_VALIDATE_INPUT_PTR(pOutput);
XN_VALIDATE_INPUT_PTR(pnOutputSize);
// Encode the data...
nLastValue = *pInput;
*pOutput = nLastValue;
pInput++;
pOutput++;
while (pInput != pInputEnd)
{
nCurrValue = *pInput;
nDiffValue = (nLastValue - nCurrValue);
nAbsDiffValue = abs(nDiffValue);
if (nAbsDiffValue <= 6)
{
nDiffValue += 6;
if (cOutStage == 0)
{
cOutChar = nDiffValue << 4;
cOutStage = 1;
}
else
{
cOutChar += nDiffValue;
if ((cOutChar == 0x66) && (bFlag == FALSE))
{
cZeroCounter++;
if (cZeroCounter == 15)
{
*pOutput = 0xEF;
pOutput++;
cZeroCounter = 0;
}
}
else
{
if (cZeroCounter != 0)
{
*pOutput = 0xE0 + cZeroCounter;
pOutput++;
cZeroCounter = 0;
}
*pOutput = cOutChar;
pOutput++;
bFlag = FALSE;
}
cOutStage = 0;
}
}
else
{
if (cZeroCounter != 0)
{
*pOutput = 0xE0 + cZeroCounter;
pOutput++;
cZeroCounter = 0;
}
if (cOutStage == 0)
{
cOutChar = 0xF0;
cOutChar += nCurrValue >> 4;
*pOutput = cOutChar;
pOutput++;
cOutChar = (nCurrValue & 0xF) << 4;
cOutStage = 1;
bFlag = TRUE;
}
else
{
cOutChar += 0x0F;
cOutStage = 0;
*pOutput = cOutChar;
pOutput++;
*pOutput = nCurrValue;
pOutput++;
}
}
nLastValue = nCurrValue;
pInput++;
}
if (cOutStage != 0)
{
*pOutput = cOutChar + 0x0D;
pOutput++;
}
if (cZeroCounter != 0)
{
*pOutput = 0xE0 + cZeroCounter;
pOutput++;
}
*pnOutputSize = pOutput - pOrigOutput;
// All is good...
return (XN_STATUS_OK);
}
XN_FORMATS_API XnStatus XnStreamUncompressImage8Z(const XnUInt8* pInput, const XnUInt32 nInputSize, XnUInt8* pOutput, XnUInt32* pnOutputSize)
{
const XnUInt8* pInputEnd = pInput + nInputSize;
const XnUInt8* pOrigOutput = pOutput;
XnUInt8 nLastFullValue = 0;
XnUInt8 cInput = 0;
XnUInt8 cZeroCounter = 0;
XnInt8 cInData1 = 0;
XnInt8 cInData2 = 0;
// Note: this function does not make sure it stay within the output memory boundaries!
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(pInput);
XN_VALIDATE_INPUT_PTR(pOutput);
XN_VALIDATE_INPUT_PTR(pnOutputSize);
if (nInputSize < sizeof(XnUInt8))
{
return (XN_STATUS_IO_COMPRESSED_BUFFER_TOO_SMALL);
}
// Decode the data...
nLastFullValue = *pInput;
*pOutput = nLastFullValue;
pInput++;
pOutput++;
while (pInput != pInputEnd)
{
cInput = *pInput;
if (cInput < 0xE0)
{
cInData1 = cInput >> 4;
cInData2 = (cInput & 0x0f);
nLastFullValue -= (cInData1 - 6);
*pOutput = nLastFullValue;
pOutput++;
if (cInData2 != 0x0f)
{
if (cInData2 != 0x0d)
{
nLastFullValue -= (cInData2 - 6);
*pOutput = nLastFullValue;
pOutput++;
}
}
else
{
pInput++;
nLastFullValue = *pInput;
*pOutput = nLastFullValue;
pOutput++;
}
pInput++;
}
else if (cInput >= 0xF0)
{
cInData1 = cInput << 4;
pInput++;
cInput = *pInput;
nLastFullValue = cInData1 + (cInput >> 4);
*pOutput = nLastFullValue;
pOutput++;
cInData2 = cInput & 0xF;
if (cInData2 == 0x0F)
{
pInput++;
nLastFullValue = *pInput;
*pOutput = nLastFullValue;
pOutput++;
pInput++;
}
else
{
if (cInData2 != 0x0D)
{
nLastFullValue -= (cInData2 - 6);
*pOutput = nLastFullValue;
pOutput++;
}
pInput++;
}
}
else //It must be 0xE?
{
cZeroCounter = cInput - 0xE0;
while (cZeroCounter != 0)
{
*pOutput = nLastFullValue;
pOutput++;
*pOutput = nLastFullValue;
pOutput++;
cZeroCounter--;
}
pInput++;
}
}
*pnOutputSize = (pOutput - pOrigOutput);
// All is good...
return (XN_STATUS_OK);
}
XN_FORMATS_API XnStatus XnStreamCompressConf4(const XnUInt8* pInput, const XnUInt32 nInputSize, XnUInt8* pOutput, XnUInt32* pnOutputSize)
{
// Local function variables
const XnUInt8* pInputEnd = pInput + nInputSize;
const XnUInt8* pOrigOutput = pOutput;
// Note: this function does not make sure it stay within the output memory boundaries!
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(pInput);
XN_VALIDATE_INPUT_PTR(pOutput);
XN_VALIDATE_INPUT_PTR(pnOutputSize);
// Encode the data...
while (pInput != pInputEnd)
{
*pOutput = *pInput << 4;
pInput++;
*pOutput += *pInput;
pInput++;
pOutput++;
}
*pnOutputSize = pOutput - pOrigOutput;
// All is good...
return (XN_STATUS_OK);
}
XN_FORMATS_API XnStatus XnStreamUncompressConf4(const XnUInt8* pInput, const XnUInt32 nInputSize, XnUInt8* pOutput, XnUInt32* pnOutputSize)
{
// Local function variables
const XnUInt8* pInputEnd = pInput + nInputSize;
const XnUInt8* pOutputEnd = 0;
const XnUInt8* pOrigOutput = pOutput;
XnUInt8 nValue1;
XnUInt8 nValue2;
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_INPUT_PTR(pInput);
XN_VALIDATE_INPUT_PTR(pOutput);
XN_VALIDATE_INPUT_PTR(pnOutputSize);
if (nInputSize < sizeof(XnUInt8))
{
return (XN_STATUS_IO_COMPRESSED_BUFFER_TOO_SMALL);
}
if (nInputSize % 2 != 0)
{
return (XN_STATUS_IO_INVALID_COMPRESSED_BUFFER_SIZE);
}
pOutputEnd = pOutput + *pnOutputSize;
XN_CHECK_OUTPUT_OVERFLOW(pOutput + (nInputSize * 2), pOutputEnd);
while (pInput != pInputEnd)
{
nValue1 = pInput[0];
nValue2 = pInput[1];
pOutput[0] = nValue1 >> 4;
pOutput[1] = nValue1 & 0xF;
pOutput[2] = nValue2 >> 4;
pOutput[3] = nValue2 & 0xF;
pOutput+=4;
pInput+=2;
}
*pnOutputSize = (pOutput - pOrigOutput);
// All is good...
return (XN_STATUS_OK);
}
void XnStreamJPEGCompDummyFunction(struct jpeg_compress_struct* pjCompStruct)
{
// Dummy libjpeg function to wrap internal buffers usage...
}
boolean XnStreamJPEGCompDummyFailFunction(struct jpeg_compress_struct* pjCompStruct)
{
// If we ever got to the point we need to allocate more memory, something is wrong!
return (FALSE);
}
XN_FORMATS_API XnStatus XnStreamInitCompressImageJ(XnStreamCompJPEGContext* pStreamCompJPEGContext)
{
// Validate the input/output pointers (to make sure none of them is NULL)
XN_VALIDATE_OUTPUT_PTR(pStreamCompJPEGContext);
pStreamCompJPEGContext->jCompStruct.err = jpeg_std_error(&pStreamCompJPEGContext->jErrMgr);
jpeg_create_compress(&pStreamCompJPEGContext->jCompStruct);
pStreamCompJPEGContext->jCompStruct.dest = &pStreamCompJPEGContext->jDestMgr;
pStreamCompJPEGContext->jCompStruct.dest->init_destination = XnStreamJPEGCompDummyFunction;
pStreamCompJPEGContext->jCompStruct.dest->empty_output_buffer = XnStreamJPEGCompDummyFailFunction;
pStreamCompJPEGContext->jCompStruct.dest->term_destination = XnStreamJPEGCompDummyFunction;
// All is good...
return (XN_STATUS_OK);
}