Yucom/jxrlib/image/decode/decode.c
2020-09-29 14:29:06 -05:00

200 lines
6.5 KiB
C

//*@@@+++@@@@******************************************************************
//
// Copyright © Microsoft Corp.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// • Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// • Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
//*@@@---@@@@******************************************************************
/******************************************************************************
Module Name:
decode.c
Abstract:
Defines the entry point for the console application.
Author:
Revision History:
*******************************************************************************/
#include "strcodec.h"
#include "decode.h"
#ifdef MEM_TRACE
#define TRACE_MALLOC 1
#define TRACE_NEW 0
#define TRACE_HEAP 0
#include "memtrace.h"
#endif
/******************************************************************
Free Adaptive Huffman Table
******************************************************************/
static Void CleanAH(CAdaptiveHuffman **ppAdHuff)
{
CAdaptiveHuffman *pAdHuff;
if (NULL != ppAdHuff) {
pAdHuff = *ppAdHuff;
if (NULL != pAdHuff) {
free(pAdHuff);
}
*ppAdHuff = NULL;
}
}
static Void CleanAHDec(CCodingContext * pSC)
{
Int kk;
for (kk = 0; kk < NUMVLCTABLES; kk++) {
CleanAH(&(pSC->m_pAHexpt[kk]));
}
CleanAH(&(pSC->m_pAdaptHuffCBPCY));
CleanAH(&(pSC->m_pAdaptHuffCBPCY1));
}
/*************************************************************************
Initialize an adaptive huffman table
*************************************************************************/
static Int InitializeAH(CAdaptiveHuffman **ppAdHuff, Int iSym)
{
Int iMemStatus = 0;
CAdaptiveHuffman *pAdHuff = Allocate(iSym, DECODER);
if (pAdHuff == NULL) {
iMemStatus = -1; // out of memory
goto ErrorExit;
}
//Adapt(pAdHuff, bFixedTables);
//InitHuffman(pAdHuff->m_pHuffman);
//if (ICERR_OK != initHuff(pAdHuff->m_pHuffman, 1, pAdHuff->m_pTable, NULL)) {
// goto ErrorExit;
//}
*ppAdHuff = pAdHuff;
return ICERR_OK;
ErrorExit:
if (pAdHuff) {
free(pAdHuff);
}
*ppAdHuff = NULL;
if (-1 == iMemStatus) {
printf("Insufficient memory to init decoder.\n");
}
return ICERR_ERROR;
}
/*************************************************************************
Context allocation
*************************************************************************/
Int AllocateCodingContextDec(CWMImageStrCodec *pSC, Int iNumContexts)
{
Int i, iCBPSize, k;
static const Int aAlphabet[] = {5,4,8,7,7, 12,6,6,12,6,6,7,7, 12,6,6,12,6,6,7,7};
if (iNumContexts > MAX_TILES || iNumContexts < 1) // only between 1 and MAX_TILES allowed
return ICERR_ERROR;
if (pSC == NULL)
return ICERR_ERROR;
pSC->m_pCodingContext = malloc (iNumContexts * sizeof (CCodingContext));
if (pSC->m_pCodingContext == NULL) {
pSC->cNumCodingContext = 0;
return ICERR_ERROR;
}
memset (pSC->m_pCodingContext, 0, iNumContexts * sizeof (CCodingContext));
pSC->cNumCodingContext = iNumContexts;
iCBPSize = (pSC->m_param.cfColorFormat == Y_ONLY || pSC->m_param.cfColorFormat == NCOMPONENT
|| pSC->m_param.cfColorFormat == CMYK) ? 5 : 9;
/** allocate / initialize members **/
for (i = 0; i < iNumContexts; i++) {
CCodingContext *pContext = &(pSC->m_pCodingContext[i]);
/** allocate adaptive Huffman encoder **/
if (InitializeAH(&pContext->m_pAdaptHuffCBPCY, iCBPSize) != ICERR_OK) {
return ICERR_ERROR;
}
if (InitializeAH(&pContext->m_pAdaptHuffCBPCY1, 5) != ICERR_OK) {
return ICERR_ERROR;
}
for(k = 0; k < NUMVLCTABLES; k ++){
if (InitializeAH(&pContext->m_pAHexpt[k], aAlphabet[k]) != ICERR_OK) {
return ICERR_ERROR;
}
}
ResetCodingContextDec(pContext);
}
return ICERR_OK;
}
/*************************************************************************
Context reset on encoder
*************************************************************************/
Void ResetCodingContextDec(CCodingContext *pContext)
{
Int k;
/** set flags **/
pContext->m_pAdaptHuffCBPCY->m_bInitialize = FALSE;
pContext->m_pAdaptHuffCBPCY1->m_bInitialize = FALSE;
for(k = 0; k < NUMVLCTABLES; k ++)
pContext->m_pAHexpt[k]->m_bInitialize = FALSE;
// reset VLC tables
AdaptLowpassDec (pContext);
AdaptHighpassDec (pContext);
// reset zigzag patterns, totals
InitZigzagScan(pContext);
// reset bit reduction and cbp models
ResetCodingContext(pContext);
}
/*************************************************************************
Context deletion
*************************************************************************/
Void FreeCodingContextDec(CWMImageStrCodec *pSC)
{
Int iContexts = (Int)(pSC->cNumCodingContext), i, k;
if (iContexts > 0 && pSC->m_pCodingContext) {
for (i = 0; i < iContexts; i++) {
CCodingContext *pContext = &(pSC->m_pCodingContext[i]);
CleanAH (&pContext->m_pAdaptHuffCBPCY);
CleanAH (&pContext->m_pAdaptHuffCBPCY1);
for (k = 0; k < NUMVLCTABLES; k++)
CleanAH (&pContext->m_pAHexpt[k]);
}
free (pSC->m_pCodingContext);
}
}