/// <summary>
/// Install a special processing method for COM or APPn markers.
/// </summary>
public void jpeg_set_marker_processor(int marker_code, jpeg_decompress_struct.jpeg_marker_parser_method routine)
{
if (marker_code == (int)JPEG_MARKER.COM)
{
m_process_COM = routine;
}
else if (marker_code >= (int)JPEG_MARKER.APP0 && marker_code <= (int)JPEG_MARKER.APP15)
{
m_process_APPn[marker_code - (int)JPEG_MARKER.APP0] = routine;
}
else
{
m_cinfo.ERREXIT(J_MESSAGE_CODE.JERR_UNKNOWN_MARKER, marker_code);
}
}
public void jpeg_save_markers(int marker_code, int length_limit)
{
/* Choose processor routine to use.
* APP0/APP14 have special requirements.
*/
jpeg_decompress_struct.jpeg_marker_parser_method processor;
if (length_limit != 0)
{
processor = save_marker;
/* If saving APP0/APP14, save at least enough for our internal use. */
if (marker_code == (int)JPEG_MARKER.APP0 && length_limit < APP0_DATA_LEN)
{
length_limit = APP0_DATA_LEN;
}
else if (marker_code == (int)JPEG_MARKER.APP14 && length_limit < APP14_DATA_LEN)
{
length_limit = APP14_DATA_LEN;
}
}
else
{
processor = skip_variable;
/* If discarding APP0/APP14, use our regular on-the-fly processor. */
if (marker_code == (int)JPEG_MARKER.APP0 || marker_code == (int)JPEG_MARKER.APP14)
{
processor = get_interesting_appn;
}
}
if (marker_code == (int)JPEG_MARKER.COM)
{
m_process_COM = processor;
m_length_limit_COM = length_limit;
}
else if (marker_code >= (int)JPEG_MARKER.APP0 && marker_code <= (int)JPEG_MARKER.APP15)
{
m_process_APPn[marker_code - (int)JPEG_MARKER.APP0] = processor;
m_length_limit_APPn[marker_code - (int)JPEG_MARKER.APP0] = length_limit;
}
else
{
m_cinfo.ERREXIT(J_MESSAGE_CODE.JERR_UNKNOWN_MARKER, marker_code);
}
}
private int m_bytes_read; /* data bytes read so far in marker */
/* Note: cur_marker is not linked into marker_list until it's all read. */
/// <summary>
/// Initialize the marker reader module.
/// This is called only once, when the decompression object is created.
/// </summary>
public jpeg_marker_reader(jpeg_decompress_struct cinfo)
{
m_cinfo = cinfo;
/* Initialize COM/APPn processing.
* By default, we examine and then discard APP0 and APP14,
* but simply discard COM and all other APPn.
*/
m_process_COM = skip_variable;
for (int i = 0; i < 16; i++)
{
m_process_APPn[i] = skip_variable;
m_length_limit_APPn[i] = 0;
}
m_process_APPn[0] = get_interesting_appn;
m_process_APPn[14] = get_interesting_appn;
/* Reset marker processing state */
reset_marker_reader();
}
private int m_bytes_read; /* data bytes read so far in marker */
/* Note: cur_marker is not linked into marker_list until it's all read. */
/// <summary>
/// Initialize the marker reader module.
/// This is called only once, when the decompression object is created.
/// </summary>
public jpeg_marker_reader(jpeg_decompress_struct cinfo)
{
m_cinfo = cinfo;
/* Initialize COM/APPn processing.
* By default, we examine and then discard APP0 and APP14,
* but simply discard COM and all other APPn.
*/
m_process_COM = skip_variable;
for (int i = 0; i < 16; i++)
{
m_process_APPn[i] = skip_variable;
m_length_limit_APPn[i] = 0;
}
m_process_APPn[0] = get_interesting_appn;
m_process_APPn[14] = get_interesting_appn;
/* Reset marker processing state */
reset_marker_reader();
}
public void jpeg_save_markers(int marker_code, int length_limit)
{
/* Choose processor routine to use.
* APP0/APP14 have special requirements.
*/
jpeg_decompress_struct.jpeg_marker_parser_method processor;
if (length_limit != 0)
{
processor = save_marker;
/* If saving APP0/APP14, save at least enough for our internal use. */
if (marker_code == (int)JPEG_MARKER.APP0 && length_limit < APP0_DATA_LEN)
length_limit = APP0_DATA_LEN;
else if (marker_code == (int)JPEG_MARKER.APP14 && length_limit < APP14_DATA_LEN)
length_limit = APP14_DATA_LEN;
}
else
{
processor = skip_variable;
/* If discarding APP0/APP14, use our regular on-the-fly processor. */
if (marker_code == (int)JPEG_MARKER.APP0 || marker_code == (int)JPEG_MARKER.APP14)
processor = get_interesting_appn;
}
if (marker_code == (int)JPEG_MARKER.COM)
{
m_process_COM = processor;
m_length_limit_COM = length_limit;
}
else if (marker_code >= (int)JPEG_MARKER.APP0 && marker_code <= (int)JPEG_MARKER.APP15)
{
m_process_APPn[marker_code - (int)JPEG_MARKER.APP0] = processor;
m_length_limit_APPn[marker_code - (int)JPEG_MARKER.APP0] = length_limit;
}
else
m_cinfo.ERREXIT(J_MESSAGE_CODE.JERR_UNKNOWN_MARKER, marker_code);
}
/// <summary>
/// Install a special processing method for COM or APPn markers.
/// </summary>
public void jpeg_set_marker_processor(int marker_code, jpeg_decompress_struct.jpeg_marker_parser_method routine)
{
if (marker_code == (int)JPEG_MARKER.COM)
m_process_COM = routine;
else if (marker_code >= (int)JPEG_MARKER.APP0 && marker_code <= (int)JPEG_MARKER.APP15)
m_process_APPn[marker_code - (int)JPEG_MARKER.APP0] = routine;
else
m_cinfo.ERREXIT(J_MESSAGE_CODE.JERR_UNKNOWN_MARKER, marker_code);
}
/* Install a special processing method for COM or APPn markers. */
public void SetMarkerProcessor(int markerCode, MarkerParser routine)
{
jpeg_decompress_struct.jpeg_marker_parser_method f = delegate { return(routine(this)); };
m_decompressor.jpeg_set_marker_processor(markerCode, f);
}
