public JpegDCoefController(JpegDecompressStruct cinfo, bool need_full_buffer)
{
m_cinfo = cinfo;
/* Create the coefficient buffer. */
if (need_full_buffer)
{
/* Allocate a full-image virtual array for each component, */
/* padded to a multiple of samp_factor DCT blocks in each direction. */
/* Note we ask for a pre-zeroed array. */
for (var ci = 0; ci < cinfo.numComponents; ci++)
{
m_whole_image[ci] = JpegCommonStruct.CreateBlocksArray(
JpegUtils.jround_up(cinfo.CompInfo[ci].Width_in_blocks, cinfo.CompInfo[ci].H_samp_factor),
JpegUtils.jround_up(cinfo.CompInfo[ci].height_in_blocks, cinfo.CompInfo[ci].V_samp_factor));
m_whole_image[ci].ErrorProcessor = cinfo;
}
m_useDummyConsumeData = false;
m_decompressor = DecompressorType.Ordinary;
m_coef_arrays = m_whole_image; /* link to virtual arrays */
}
else
{
/* We only need a single-MCU buffer. */
for (var i = 0; i < JpegConstants.D_MAX_BLOCKS_IN_MCU; i++)
{
m_MCU_buffer[i] = new JBlock();
}
m_useDummyConsumeData = true;
m_decompressor = DecompressorType.OnePass;
m_coef_arrays = null; /* flag for no virtual arrays */
}
}
public MyCCoefController(JpegCompressStruct cinfo, bool need_full_buffer)
{
m_cinfo = cinfo;
/* Create the coefficient buffer. */
if (need_full_buffer)
{
/* Allocate a full-image virtual array for each component, */
/* padded to a multiple of samp_factor DCT blocks in each direction. */
for (var ci = 0; ci < cinfo.m_num_components; ci++)
{
m_whole_image[ci] = JpegCommonStruct.CreateBlocksArray(
JpegUtils.jround_up(cinfo.Component_info[ci].Width_in_blocks, cinfo.Component_info[ci].H_samp_factor),
JpegUtils.jround_up(cinfo.Component_info[ci].height_in_blocks, cinfo.Component_info[ci].V_samp_factor));
m_whole_image[ci].ErrorProcessor = cinfo;
}
}
else
{
/* We only need a single-MCU buffer. */
var buffer = new JBlock[JpegConstants.C_MAX_BLOCKS_IN_MCU];
for (var i = 0; i < JpegConstants.C_MAX_BLOCKS_IN_MCU; i++)
{
buffer[i] = new JBlock();
}
for (var i = 0; i < JpegConstants.C_MAX_BLOCKS_IN_MCU; i++)
{
m_MCU_buffer[i] = new JBlock[JpegConstants.C_MAX_BLOCKS_IN_MCU - i];
for (var j = i; j < JpegConstants.C_MAX_BLOCKS_IN_MCU; j++)
{
m_MCU_buffer[i][j - i] = buffer[j];
}
}
/* flag for no virtual arrays */
m_whole_image[0] = null;
}
}
