GDALAsyncReader*
ECWDataset::BeginAsyncReader( int nXOff, int nYOff, int nXSize, int nYSize,
void *pBuf, int nBufXSize, int nBufYSize,
GDALDataType eBufType,
int nBandCount, int* panBandMap,
int nPixelSpace, int nLineSpace, int nBandSpace,
char **papszOptions)
{
int i;
/* -------------------------------------------------------------------- */
/* Provide default packing if needed. */
/* -------------------------------------------------------------------- */
if( nPixelSpace == 0 )
nPixelSpace = GDALGetDataTypeSize(eBufType) / 8;
if( nLineSpace == 0 )
nLineSpace = nPixelSpace * nBufXSize;
if( nBandSpace == 0 )
nBandSpace = nLineSpace * nBufYSize;
/* -------------------------------------------------------------------- */
/* Do a bit of validation. */
/* -------------------------------------------------------------------- */
if( nXSize < 1 || nYSize < 1 || nBufXSize < 1 || nBufYSize < 1 )
{
CPLDebug( "GDAL",
"BeginAsyncReader() skipped for odd window or buffer size.\n"
" Window = (%d,%d)x%dx%d\n"
" Buffer = %dx%d\n",
nXOff, nYOff, nXSize, nYSize,
nBufXSize, nBufYSize );
return NULL;
}
if( nXOff < 0 || nXOff > INT_MAX - nXSize || nXOff + nXSize > nRasterXSize
|| nYOff < 0 || nYOff > INT_MAX - nYSize || nYOff + nYSize > nRasterYSize )
{
ReportError( CE_Failure, CPLE_IllegalArg,
"Access window out of range in RasterIO(). Requested\n"
"(%d,%d) of size %dx%d on raster of %dx%d.",
nXOff, nYOff, nXSize, nYSize, nRasterXSize, nRasterYSize );
return NULL;
}
if( nBandCount <= 0 || nBandCount > nBands )
{
ReportError( CE_Failure, CPLE_IllegalArg, "Invalid band count" );
return NULL;
}
if( panBandMap != NULL )
{
for( i = 0; i < nBandCount; i++ )
{
if( panBandMap[i] < 1 || panBandMap[i] > nBands )
{
ReportError( CE_Failure, CPLE_IllegalArg,
"panBandMap[%d] = %d, this band does not exist on dataset.",
i, panBandMap[i] );
return NULL;
}
}
}
/* -------------------------------------------------------------------- */
/* Create the corresponding async reader. */
/* -------------------------------------------------------------------- */
ECWAsyncReader *poReader = new ECWAsyncReader();
poReader->poDS = this;
poReader->nXOff = nXOff;
poReader->nYOff = nYOff;
poReader->nXSize = nXSize;
poReader->nYSize = nYSize;
poReader->pBuf = pBuf;
poReader->nBufXSize = nBufXSize;
poReader->nBufYSize = nBufYSize;
poReader->eBufType = eBufType;
poReader->nBandCount = nBandCount;
poReader->panBandMap = (int *) CPLCalloc(sizeof(int),nBandCount);
if( panBandMap != NULL )
{
memcpy( poReader->panBandMap, panBandMap, sizeof(int) * nBandCount );
}
else
{
for( i = 0; i < nBandCount; i++ )
poReader->panBandMap[i] = i + 1;
}
poReader->nPixelSpace = nPixelSpace;
poReader->nLineSpace = nLineSpace;
poReader->nBandSpace = nBandSpace;
/* -------------------------------------------------------------------- */
/* Create a new view for this request. */
/* -------------------------------------------------------------------- */
poReader->poFileView = OpenFileView( GetDescription(), true,
poReader->bUsingCustomStream );
if( poReader->poFileView == NULL )
{
delete poReader;
return NULL;
}
poReader->poFileView->SetClientData( poReader );
poReader->poFileView->SetRefreshCallback( ECWAsyncReader::RefreshCB );
/* -------------------------------------------------------------------- */
/* Issue a corresponding SetView command. */
/* -------------------------------------------------------------------- */
std::vector<UINT32> anBandIndices;
NCSError eNCSErr;
CNCSError oErr;
for( i = 0; i < nBandCount; i++ )
anBandIndices.push_back( panBandMap[i] - 1 );
oErr = poReader->poFileView->SetView( nBandCount, &(anBandIndices[0]),
nXOff, nYOff,
nXOff + nXSize - 1,
nYOff + nYSize - 1,
nBufXSize, nBufYSize );
eNCSErr = oErr.GetErrorNumber();
if( eNCSErr != NCS_SUCCESS )
{
delete poReader;
CPLError( CE_Failure, CPLE_AppDefined,
"%s", NCSGetErrorText(eNCSErr) );
return NULL;
}
return poReader;
}
GDALAsyncReader*
ECWDataset::BeginAsyncReader( int nXOff, int nYOff, int nXSize, int nYSize,
void *pBuf, int nBufXSize, int nBufYSize,
GDALDataType eBufType,
int nBandCount, int* panBandMap,
int nPixelSpace, int nLineSpace, int nBandSpace,
char **papszOptions)
{
/* -------------------------------------------------------------------- */
/* Provide default packing if needed. */
/* -------------------------------------------------------------------- */
if( nPixelSpace == 0 )
nPixelSpace = GDALGetDataTypeSize(eBufType) / 8;
if( nLineSpace == 0 )
nLineSpace = nPixelSpace * nBufXSize;
if( nBandSpace == 0 )
nBandSpace = nLineSpace * nBufYSize;
/* -------------------------------------------------------------------- */
/* We should do a bit of validation first - perhaps add later. */
/* -------------------------------------------------------------------- */
/* -------------------------------------------------------------------- */
/* Create the corresponding async reader. */
/* -------------------------------------------------------------------- */
ECWAsyncReader *poReader = new ECWAsyncReader();
poReader->poDS = this;
poReader->nXOff = nXOff;
poReader->nYOff = nYOff;
poReader->nXSize = nXSize;
poReader->nYSize = nYSize;
poReader->pBuf = pBuf;
poReader->nBufXSize = nBufXSize;
poReader->nBufYSize = nBufYSize;
poReader->eBufType = eBufType;
poReader->nBandCount = nBandCount;
poReader->panBandMap = (int *) CPLCalloc(sizeof(int),nBandCount);
memcpy( poReader->panBandMap, panBandMap, sizeof(int) * nBandCount );
poReader->nPixelSpace = nPixelSpace;
poReader->nLineSpace = nLineSpace;
poReader->nBandSpace = nBandSpace;
/* -------------------------------------------------------------------- */
/* Create a new view for this request. */
/* -------------------------------------------------------------------- */
poReader->poFileView = OpenFileView( GetDescription(), true,
poReader->bUsingCustomStream );
if( poReader->poFileView == NULL )
{
delete poReader;
return NULL;
}
poReader->poFileView->SetClientData( poReader );
poReader->poFileView->SetRefreshCallback( ECWAsyncReader::RefreshCB );
/* -------------------------------------------------------------------- */
/* Issue a corresponding SetView command. */
/* -------------------------------------------------------------------- */
std::vector<UINT32> anBandIndices;
int i;
NCSError eNCSErr;
CNCSError oErr;
for( i = 0; i < nBandCount; i++ )
anBandIndices.push_back( panBandMap[i] - 1 );
oErr = poReader->poFileView->SetView( nBandCount, &(anBandIndices[0]),
nXOff, nYOff,
nXOff + nXSize - 1,
nYOff + nYSize - 1,
nBufXSize, nBufYSize );
eNCSErr = oErr.GetErrorNumber();
if( eNCSErr != NCS_SUCCESS )
{
delete poReader;
CPLError( CE_Failure, CPLE_AppDefined,
"%s", NCSGetErrorText(eNCSErr) );
return NULL;
}
return poReader;
}