static int[][] getDct(string filename)
{
jpeg_decompress_struct cinfo = new jpeg_decompress_struct();
FileStream objFileStreamHeaderImage = new FileStream(filename, FileMode.Open, FileAccess.Read);
cinfo.jpeg_stdio_src(objFileStreamHeaderImage);
cinfo.jpeg_read_header(true);
var coeffs = cinfo.jpeg_read_coefficients();
const int size = 64;
int height = cinfo.Image_height / size;
int width = cinfo.Image_width / size;
int[][] result = new int[height * width][];
var dct = coeffs[0].Access(0, height);
for (int i = 0; i < height * width; i++)
{
result[i] = new int[size];
}
for (int i = 0; i < height; i++)
{
for (int j = 0; j < width; j++)
{
for (int k = 0; k < 64; k++)
{
result[i * width + j][k] = dct[i][j][k];
}
}
}
return result;
}
public void TestMarkerList()
{
jpeg_decompress_struct cinfo = new jpeg_decompress_struct();
using (FileStream input = new FileStream(Path.Combine(Tester.Testcase, "PARROTS.JPG"), FileMode.Open))
{
/* Specify data source for decompression */
cinfo.jpeg_stdio_src(input);
const int markerDataLengthLimit = 1000;
cinfo.jpeg_save_markers((int)JPEG_MARKER.COM, markerDataLengthLimit);
cinfo.jpeg_save_markers((int)JPEG_MARKER.APP0, markerDataLengthLimit);
/* Read file header, set default decompression parameters */
cinfo.jpeg_read_header(true);
Assert.AreEqual(cinfo.Marker_list.Count, 3);
int[] expectedMarkerType = { (int)JPEG_MARKER.APP0, (int)JPEG_MARKER.APP0, (int)JPEG_MARKER.COM };
int[] expectedMarkerOriginalLength = { 14, 3072, 10 };
for (int i = 0; i < cinfo.Marker_list.Count; ++i)
{
jpeg_marker_struct marker = cinfo.Marker_list[i];
Assert.IsNotNull(marker);
Assert.AreEqual(marker.Marker, expectedMarkerType[i]);
Assert.AreEqual(marker.OriginalLength, expectedMarkerOriginalLength[i]);
Assert.LessOrEqual(marker.Data.Length, markerDataLengthLimit);
}
}
}
private int cur_output_row; /* next row# to write to virtual array */
public bmp_dest_struct(jpeg_decompress_struct cinfo, bool is_os2)
{
this.cinfo = cinfo;
this.is_os2 = is_os2;
if (cinfo.Out_color_space == J_COLOR_SPACE.JCS_GRAYSCALE)
{
m_putGrayRows = true;
}
else if (cinfo.Out_color_space == J_COLOR_SPACE.JCS_RGB)
{
if (cinfo.Quantize_colors)
m_putGrayRows = true;
else
m_putGrayRows = false;
}
else
{
cinfo.ERREXIT((int)ADDON_MESSAGE_CODE.JERR_BMP_COLORSPACE);
}
/* Calculate output image dimensions so we can allocate space */
cinfo.jpeg_calc_output_dimensions();
/* Determine width of rows in the BMP file (padded to 4-byte boundary). */
row_width = cinfo.Output_width * cinfo.Output_components;
data_width = row_width;
while ((row_width & 3) != 0)
row_width++;
pad_bytes = row_width - data_width;
/* Allocate space for inversion array, prepare for write pass */
whole_image = jpeg_common_struct.CreateSamplesArray(row_width, cinfo.Output_height);
whole_image.ErrorProcessor = cinfo;
cur_output_row = 0;
if (cinfo.Progress != null)
{
cdjpeg_progress_mgr progress = cinfo.Progress as cdjpeg_progress_mgr;
if (progress != null)
{
/* count file input as separate pass */
progress.total_extra_passes++;
}
}
/* Create decompressor output buffer. */
buffer = jpeg_common_struct.AllocJpegSamples(row_width, 1);
buffer_height = 1;
}
private static void decompress(Stream input, DecompressOptions options, Stream output)
{
Debug.Assert(input != null);
Debug.Assert(options != null);
Debug.Assert(output != null);
/* Initialize the JPEG decompression object with default error handling. */
jpeg_decompress_struct cinfo = new jpeg_decompress_struct(new cd_jpeg_error_mgr());
/* Insert custom marker processor for COM and APP12.
* APP12 is used by some digital camera makers for textual info,
* so we provide the ability to display it as text.
* If you like, additional APPn marker types can be selected for display,
* but don't try to override APP0 or APP14 this way (see libjpeg.doc).
*/
cinfo.jpeg_set_marker_processor((int)JPEG_MARKER.COM, new jpeg_decompress_struct.jpeg_marker_parser_method(printTextMarker));
cinfo.jpeg_set_marker_processor((int)JPEG_MARKER.APP0 + 12, printTextMarker);
/* Specify data source for decompression */
cinfo.jpeg_stdio_src(input);
/* Read file header, set default decompression parameters */
cinfo.jpeg_read_header(true);
applyOptions(cinfo, options);
/* Initialize the output module now to let it override any crucial
* option settings (for instance, GIF wants to force color quantization).
*/
djpeg_dest_struct dest_mgr = null;
switch (options.OutputFormat)
{
case IMAGE_FORMATS.FMT_BMP:
dest_mgr = new bmp_dest_struct(cinfo, false);
break;
case IMAGE_FORMATS.FMT_OS2:
dest_mgr = new bmp_dest_struct(cinfo, true);
break;
default:
cinfo.ERREXIT((int)ADDON_MESSAGE_CODE.JERR_UNSUPPORTED_FORMAT);
break;
}
dest_mgr.output_file = output;
/* Start decompressor */
cinfo.jpeg_start_decompress();
/* Write output file header */
dest_mgr.start_output();
/* Process data */
while (cinfo.Output_scanline < cinfo.Output_height)
{
int num_scanlines = cinfo.jpeg_read_scanlines(dest_mgr.buffer, dest_mgr.buffer_height);
dest_mgr.put_pixel_rows(num_scanlines);
}
/* Finish decompression and release memory.
* I must do it in this order because output module has allocated memory
* of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
*/
dest_mgr.finish_output();
cinfo.jpeg_finish_decompress();
/* All done. */
if (cinfo.Err.Num_warnings != 0)
Console.WriteLine("Corrupt-data warning count is not zero");
}
static void applyOptions(jpeg_decompress_struct decompressor, DecompressOptions options)
{
Debug.Assert(decompressor != null);
Debug.Assert(options != null);
if (options.QuantizeColors)
{
decompressor.Quantize_colors = true;
decompressor.Desired_number_of_colors = options.DesiredNumberOfColors;
}
decompressor.Dct_method = options.DCTMethod;
decompressor.Dither_mode = options.DitherMode;
if (options.Debug)
decompressor.Err.Trace_level = 1;
if (options.Fast)
{
/* Select recommended processing options for quick-and-dirty output. */
decompressor.Two_pass_quantize = false;
decompressor.Dither_mode = J_DITHER_MODE.JDITHER_ORDERED;
if (!decompressor.Quantize_colors) /* don't override an earlier -colors */
decompressor.Desired_number_of_colors = 216;
decompressor.Dct_method = JpegConstants.JDCT_FASTEST;
decompressor.Do_fancy_upsampling = false;
}
if (options.Grayscale)
decompressor.Out_color_space = J_COLOR_SPACE.JCS_GRAYSCALE;
if (options.NoSmooth)
decompressor.Do_fancy_upsampling = false;
if (options.OnePass)
decompressor.Two_pass_quantize = false;
if (options.Scaled)
{
decompressor.Scale_num = options.ScaleNumerator;
decompressor.Scale_denom = options.ScaleDenominator;
}
}
/// <summary>
/// This is the default resync_to_restart method for data source
/// managers to use if they don't have any better approach.
/// </summary>
/// <param name="cinfo">An instance of <see cref="jpeg_decompress_struct"/></param>
/// <param name="desired">The desired</param>
/// <returns><c>false</c> if suspension is required.</returns>
/// <remarks>That method assumes that no backtracking is possible.
/// Some data source managers may be able to back up, or may have
/// additional knowledge about the data which permits a more
/// intelligent recovery strategy; such managers would
/// presumably supply their own resync method.<br/><br/>
/// read_restart_marker calls resync_to_restart if it finds a marker other than
/// the restart marker it was expecting. (This code is *not* used unless
/// a nonzero restart interval has been declared.) cinfo.unread_marker is
/// the marker code actually found (might be anything, except 0 or FF).
/// The desired restart marker number (0..7) is passed as a parameter.<br/><br/>
/// This routine is supposed to apply whatever error recovery strategy seems
/// appropriate in order to position the input stream to the next data segment.
/// Note that cinfo.unread_marker is treated as a marker appearing before
/// the current data-source input point; usually it should be reset to zero
/// before returning.<br/><br/>
/// This implementation is substantially constrained by wanting to treat the
/// input as a data stream; this means we can't back up. Therefore, we have
/// only the following actions to work with:<br/>
/// 1. Simply discard the marker and let the entropy decoder resume at next
/// byte of file.<br/>
/// 2. Read forward until we find another marker, discarding intervening
/// data. (In theory we could look ahead within the current bufferload,
/// without having to discard data if we don't find the desired marker.
/// This idea is not implemented here, in part because it makes behavior
/// dependent on buffer size and chance buffer-boundary positions.)<br/>
/// 3. Leave the marker unread (by failing to zero cinfo.unread_marker).
/// This will cause the entropy decoder to process an empty data segment,
/// inserting dummy zeroes, and then we will reprocess the marker.<br/>
/// #2 is appropriate if we think the desired marker lies ahead, while #3 is
/// appropriate if the found marker is a future restart marker (indicating
/// that we have missed the desired restart marker, probably because it got
/// corrupted).<br/>
/// We apply #2 or #3 if the found marker is a restart marker no more than
/// two counts behind or ahead of the expected one. We also apply #2 if the
/// found marker is not a legal JPEG marker code (it's certainly bogus data).
/// If the found marker is a restart marker more than 2 counts away, we do #1
/// (too much risk that the marker is erroneous; with luck we will be able to
/// resync at some future point).<br/>
/// For any valid non-restart JPEG marker, we apply #3. This keeps us from
/// overrunning the end of a scan. An implementation limited to single-scan
/// files might find it better to apply #2 for markers other than EOI, since
/// any other marker would have to be bogus data in that case.</remarks>
public override bool resync_to_restart(jpeg_decompress_struct cinfo, int desired)
{
Tiff tif = m_sp.GetTiff();
Tiff.ErrorExt(tif, tif.m_clientdata, "LibJpeg", "Unexpected error");
return false;
}
/// <summary>
/// This is the default resync_to_restart method for data source
/// managers to use if they don't have any better approach.
/// </summary>
/// <param name="cinfo">An instance of <see cref="jpeg_decompress_struct"/></param>
/// <param name="desired">The desired</param>
/// <returns><c>false</c> if suspension is required.</returns>
/// <remarks>That method assumes that no backtracking is possible.
/// Some data source managers may be able to back up, or may have
/// additional knowledge about the data which permits a more
/// intelligent recovery strategy; such managers would
/// presumably supply their own resync method.<br/><br/>
///
/// read_restart_marker calls resync_to_restart if it finds a marker other than
/// the restart marker it was expecting. (This code is *not* used unless
/// a nonzero restart interval has been declared.) cinfo.unread_marker is
/// the marker code actually found (might be anything, except 0 or FF).
/// The desired restart marker number (0..7) is passed as a parameter.<br/><br/>
///
/// This routine is supposed to apply whatever error recovery strategy seems
/// appropriate in order to position the input stream to the next data segment.
/// Note that cinfo.unread_marker is treated as a marker appearing before
/// the current data-source input point; usually it should be reset to zero
/// before returning.<br/><br/>
///
/// This implementation is substantially constrained by wanting to treat the
/// input as a data stream; this means we can't back up. Therefore, we have
/// only the following actions to work with:<br/>
/// 1. Simply discard the marker and let the entropy decoder resume at next
/// byte of file.<br/>
/// 2. Read forward until we find another marker, discarding intervening
/// data. (In theory we could look ahead within the current bufferload,
/// without having to discard data if we don't find the desired marker.
/// This idea is not implemented here, in part because it makes behavior
/// dependent on buffer size and chance buffer-boundary positions.)<br/>
/// 3. Leave the marker unread (by failing to zero cinfo.unread_marker).
/// This will cause the entropy decoder to process an empty data segment,
/// inserting dummy zeroes, and then we will reprocess the marker.<br/>
///
/// #2 is appropriate if we think the desired marker lies ahead, while #3 is
/// appropriate if the found marker is a future restart marker (indicating
/// that we have missed the desired restart marker, probably because it got
/// corrupted).<br/>
/// We apply #2 or #3 if the found marker is a restart marker no more than
/// two counts behind or ahead of the expected one. We also apply #2 if the
/// found marker is not a legal JPEG marker code (it's certainly bogus data).
/// If the found marker is a restart marker more than 2 counts away, we do #1
/// (too much risk that the marker is erroneous; with luck we will be able to
/// resync at some future point).<br/>
/// For any valid non-restart JPEG marker, we apply #3. This keeps us from
/// overrunning the end of a scan. An implementation limited to single-scan
/// files might find it better to apply #2 for markers other than EOI, since
/// any other marker would have to be bogus data in that case.</remarks>
public virtual bool resync_to_restart(jpeg_decompress_struct cinfo, int desired)
{
/* Always put up a warning. */
cinfo.WARNMS(J_MESSAGE_CODE.JWRN_MUST_RESYNC, cinfo.m_unread_marker, desired);
/* Outer loop handles repeated decision after scanning forward. */
int action = 1;
for ( ; ; )
{
if (cinfo.m_unread_marker < (int)JPEG_MARKER.SOF0)
{
/* invalid marker */
action = 2;
}
else if (cinfo.m_unread_marker < (int)JPEG_MARKER.RST0 ||
cinfo.m_unread_marker > (int)JPEG_MARKER.RST7)
{
/* valid non-restart marker */
action = 3;
}
else
{
if (cinfo.m_unread_marker == ((int)JPEG_MARKER.RST0 + ((desired + 1) & 7))
|| cinfo.m_unread_marker == ((int)JPEG_MARKER.RST0 + ((desired + 2) & 7)))
{
/* one of the next two expected restarts */
action = 3;
}
else if (cinfo.m_unread_marker == ((int)JPEG_MARKER.RST0 + ((desired - 1) & 7)) ||
cinfo.m_unread_marker == ((int)JPEG_MARKER.RST0 + ((desired - 2) & 7)))
{
/* a prior restart, so advance */
action = 2;
}
else
{
/* desired restart or too far away */
action = 1;
}
}
cinfo.TRACEMS(4, J_MESSAGE_CODE.JTRC_RECOVERY_ACTION, cinfo.m_unread_marker, action);
switch (action)
{
case 1:
/* Discard marker and let entropy decoder resume processing. */
cinfo.m_unread_marker = 0;
return true;
case 2:
/* Scan to the next marker, and repeat the decision loop. */
if (!cinfo.m_marker.next_marker())
return false;
break;
case 3:
/* Return without advancing past this marker. */
/* Entropy decoder will be forced to process an empty segment. */
return true;
}
}
}
private void cleanState()
{
m_compression = null;
m_decompression = null;
m_common = null;
m_h_sampling = 0;
m_v_sampling = 0;
m_jpegtables = null;
m_jpegtables_length = 0;
m_jpegquality = 0;
m_jpegcolormode = 0;
m_jpegtablesmode = 0;
m_ycbcrsampling_fetched = false;
m_recvparams = 0;
m_subaddress = null;
m_recvtime = 0;
m_faxdcs = null;
m_rawDecode = false;
m_rawEncode = false;
m_cinfo_initialized = false;
m_err = null;
m_photometric = 0;
m_bytesperline = 0;
m_ds_buffer = new byte[JpegConstants.MAX_COMPONENTS][][];
m_scancount = 0;
m_samplesperclump = 0;
}
public static jvirt_array<BitMiracle.LibJpeg.Classic.JBLOCK>[] ReadCoefFromImage(string fullPath)
{
var img = new Bitmap(fullPath);
var width = img.Width;
var height = img.Height;
img.Dispose();
BitMiracle.LibJpeg.Classic.jpeg_decompress_struct oJpegDecompress = new BitMiracle.LibJpeg.Classic.jpeg_decompress_struct();
System.IO.FileStream oFileStreamImage = new System.IO.FileStream(fullPath, System.IO.FileMode.Open, System.IO.FileAccess.Read);
oJpegDecompress.jpeg_stdio_src(oFileStreamImage);
oJpegDecompress.jpeg_read_header(true);
BitMiracle.LibJpeg.Classic.jvirt_array<BitMiracle.LibJpeg.Classic.JBLOCK>[] JBlock = oJpegDecompress.jpeg_read_coefficients();
oJpegDecompress.jpeg_finish_decompress();
oFileStreamImage.Close();
return JBlock;
}
private bool jpeg_create_decompress_encap()
{
try
{
m_libjpeg_jpeg_decompress_struct = new jpeg_decompress_struct(m_libjpeg_jpeg_error_mgr);
}
catch (Exception)
{
return false;
}
return true;
}
private void cleanState()
{
m_jpeg_interchange_format = 0;
m_jpeg_interchange_format_length = 0;
m_jpeg_proc = 0;
m_subsamplingcorrect_done = false;
m_subsampling_tag = false;
m_subsampling_hor = 0;
m_subsampling_ver = 0;
m_qtable_offset_count = 0;
m_dctable_offset_count = 0;
m_actable_offset_count = 0;
m_qtable_offset = new uint[3];
m_dctable_offset = new uint[3];
m_actable_offset = new uint[3];
m_restart_interval = 0;
m_libjpeg_jpeg_decompress_struct = null;
m_file_size = 0;
m_image_width = 0;
m_image_length = 0;
m_strile_width = 0;
m_strile_length = 0;
m_strile_length_total = 0;
m_samples_per_pixel = 0;
m_plane_sample_offset = 0;
m_samples_per_pixel_per_plane = 0;
m_subsamplingcorrect = false;
m_subsampling_force_desubsampling_inside_decompression = false;
m_qtable = new byte[4][];
m_dctable = new byte[4][];
m_actable = new byte[4][];
m_restart_index = 0;
m_sof_log = false;
m_sof_marker_id = 0;
m_sof_x = 0;
m_sof_y = 0;
m_sof_c = new byte[3];
m_sof_hv = new byte[3];
m_sof_tq = new byte[3];
m_sos_cs = new byte[3];
m_sos_tda = new byte[3];
m_sos_end = new SosEnd[3];
m_readheader_done = false;
m_writeheader_done = false;
m_write_cursample = 0;
m_write_curstrile = 0;
m_libjpeg_session_active = false;
m_libjpeg_jpeg_query_style = 0;
m_libjpeg_jpeg_error_mgr = null;
m_libjpeg_jpeg_source_mgr = null;
m_subsampling_convert_log = false;
m_subsampling_convert_ylinelen = 0;
m_subsampling_convert_ylines = 0;
m_subsampling_convert_clinelen = 0;
m_subsampling_convert_clines = 0;
m_subsampling_convert_ybuf = null;
m_subsampling_convert_cbbuf = null;
m_subsampling_convert_crbuf = null;
m_subsampling_convert_ycbcrimage = null;
m_subsampling_convert_clinelenout = 0;
m_subsampling_convert_state = 0;
m_bytes_per_line = 0;
m_lines_per_strile = 0;
m_in_buffer_source = OJPEGStateInBufferSource.osibsNotSetYet;
m_in_buffer_next_strile = 0;
m_in_buffer_strile_count = 0;
m_in_buffer_file_pos = 0;
m_in_buffer_file_pos_log = false;
m_in_buffer_file_togo = 0;
m_in_buffer_togo = 0;
m_in_buffer_cur = 0; // index into m_in_buffer
m_in_buffer = new byte[OJPEG_BUFFER];
m_out_state = 0;
m_out_buffer = new byte[OJPEG_BUFFER];
m_skip_buffer = null;
m_forceProcessedRgbOutput = false;
}
static string outfilename; /* for -outfile switch */
public static void Main(string[] args)
{
progname = Path.GetFileName(Environment.GetCommandLineArgs()[0]);
/* Initialize the JPEG decompression object with default error handling. */
cd_jpeg_error_mgr err = new cd_jpeg_error_mgr();
jpeg_decompress_struct cinfo = new jpeg_decompress_struct(err);
/* Insert custom marker processor for COM and APP12.
* APP12 is used by some digital camera makers for textual info,
* so we provide the ability to display it as text.
* If you like, additional APPn marker types can be selected for display,
* but don't try to override APP0 or APP14 this way (see libjpeg.doc).
*/
cinfo.jpeg_set_marker_processor((int)JPEG_MARKER.COM, new jpeg_decompress_struct.jpeg_marker_parser_method(print_text_marker));
cinfo.jpeg_set_marker_processor((int)JPEG_MARKER.APP0 + 12, print_text_marker);
/* Scan command line to find file names. */
/* It is convenient to use just one switch-parsing routine, but the switch
* values read here are ignored; we will rescan the switches after opening
* the input file.
* (Exception: tracing level set here controls verbosity for COM markers
* found during jpeg_read_header...)
*/
int file_index;
if (!parse_switches(cinfo, args, false, out file_index))
{
usage();
return;
}
/* Must have either -outfile switch or explicit output file name */
if (outfilename == null)
{
// file_index should point to input file
if (file_index != args.Length - 2)
{
Console.WriteLine(string.Format("{0}: must name one input and one output file.", progname));
usage();
return;
}
// output file comes right after input one
outfilename = args[file_index + 1];
}
else
{
// file_index should point to input file
if (file_index != args.Length - 1)
{
Console.WriteLine(string.Format("{0}: must name one input and one output file.", progname));
usage();
return;
}
}
/* Open the input file. */
FileStream input_file = null;
if (file_index < args.Length)
{
try
{
input_file = new FileStream(args[file_index], FileMode.Open);
}
catch (Exception e)
{
Console.WriteLine(string.Format("{0}: can't open {1}", progname, args[file_index]));
Console.WriteLine(e.Message);
return;
}
}
else
{
Console.WriteLine(string.Format("{0}: sorry, can't read file from console"));
return;
}
/* Open the output file. */
FileStream output_file = null;
if (outfilename != null)
{
try
{
output_file = new FileStream(outfilename, FileMode.Create);
}
catch (Exception e)
{
Console.WriteLine(string.Format("{0}: can't open {1}", progname, args[file_index]));
Console.WriteLine(e.Message);
return;
}
}
else
{
Console.WriteLine(string.Format("{0}: sorry, can't write file to console"));
return;
}
/* Specify data source for decompression */
cinfo.jpeg_stdio_src(input_file);
/* Read file header, set default decompression parameters */
cinfo.jpeg_read_header(true);
/* Adjust default decompression parameters by re-parsing the options */
parse_switches(cinfo, args, true, out file_index);
/* Initialize the output module now to let it override any crucial
* option settings (for instance, GIF wants to force color quantization).
*/
djpeg_dest_struct dest_mgr = null;
switch (requested_fmt)
{
case IMAGE_FORMATS.FMT_BMP:
dest_mgr = new bmp_dest_struct(cinfo, false);
break;
case IMAGE_FORMATS.FMT_OS2:
dest_mgr = new bmp_dest_struct(cinfo, true);
break;
default:
cinfo.ERREXIT((int)ADDON_MESSAGE_CODE.JERR_UNSUPPORTED_FORMAT);
break;
}
dest_mgr.output_file = output_file;
/* Start decompressor */
cinfo.jpeg_start_decompress();
/* Write output file header */
dest_mgr.start_output();
/* Process data */
while (cinfo.Output_scanline < cinfo.Output_height)
{
int num_scanlines = cinfo.jpeg_read_scanlines(dest_mgr.buffer, dest_mgr.buffer_height);
dest_mgr.put_pixel_rows(num_scanlines);
}
/* Finish decompression and release memory.
* I must do it in this order because output module has allocated memory
* of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
*/
dest_mgr.finish_output();
cinfo.jpeg_finish_decompress();
/* Close files, if we opened them */
input_file.Close();
input_file.Dispose();
output_file.Close();
output_file.Dispose();
/* All done. */
if (cinfo.Err.Num_warnings != 0)
Console.WriteLine("Corrupt-data warning count is not zero");
}
/// <summary>
/// Parse optional switches.
/// Returns argv[] index of first file-name argument (== argc if none).
/// Any file names with indexes <= last_file_arg_seen are ignored;
/// they have presumably been processed in a previous iteration.
/// (Pass 0 for last_file_arg_seen on the first or only iteration.)
/// for_real is false on the first (dummy) pass; we may skip any expensive
/// processing.
/// </summary>
static bool parse_switches(jpeg_decompress_struct cinfo, string[] argv, bool for_real, out int last_file_arg_seen)
{
string arg;
/* Set up default JPEG parameters. */
requested_fmt = IMAGE_FORMATS.FMT_BMP; /* set default output file format */
outfilename = null;
last_file_arg_seen = -1;
cinfo.Err.Trace_level = 0;
/* Scan command line options, adjust parameters */
int argn = 0;
for ( ; argn < argv.Length; argn++)
{
arg = argv[argn];
if (arg[0] != '-')
{
/* Not a switch, must be a file name argument */
last_file_arg_seen = argn;
break;
}
arg = arg.Substring(1);
if (cdjpeg_utils.keymatch(arg, "bmp", 1))
{
/* BMP output format. */
requested_fmt = IMAGE_FORMATS.FMT_BMP;
}
else if (cdjpeg_utils.keymatch(arg, "colors", 1) ||
cdjpeg_utils.keymatch(arg, "colours", 1) ||
cdjpeg_utils.keymatch(arg, "quantize", 1) ||
cdjpeg_utils.keymatch(arg, "quantise", 1))
{
/* Do color quantization. */
if (++argn >= argv.Length) /* advance to next argument */
return false;
try
{
int val = int.Parse(argv[argn]);
cinfo.Desired_number_of_colors = val;
cinfo.Quantize_colors = true;
}
catch (Exception e)
{
Console.WriteLine(e.Message);
return false;
}
}
else if (cdjpeg_utils.keymatch(arg, "dct", 2))
{
/* Select IDCT algorithm. */
if (++argn >= argv.Length) /* advance to next argument */
return false;
if (cdjpeg_utils.keymatch(argv[argn], "int", 1))
cinfo.Dct_method = J_DCT_METHOD.JDCT_ISLOW;
else if (cdjpeg_utils.keymatch(argv[argn], "fast", 2))
cinfo.Dct_method = J_DCT_METHOD.JDCT_IFAST;
else if (cdjpeg_utils.keymatch(argv[argn], "float", 2))
cinfo.Dct_method = J_DCT_METHOD.JDCT_FLOAT;
else
return false;
}
else if (cdjpeg_utils.keymatch(arg, "dither", 2))
{
/* Select dithering algorithm. */
if (++argn >= argv.Length) /* advance to next argument */
return false;
if (cdjpeg_utils.keymatch(argv[argn], "fs", 2))
cinfo.Dither_mode = J_DITHER_MODE.JDITHER_FS;
else if (cdjpeg_utils.keymatch(argv[argn], "none", 2))
cinfo.Dither_mode = J_DITHER_MODE.JDITHER_NONE;
else if (cdjpeg_utils.keymatch(argv[argn], "ordered", 2))
cinfo.Dither_mode = J_DITHER_MODE.JDITHER_ORDERED;
else
return false;
}
else if (cdjpeg_utils.keymatch(arg, "debug", 1) || cdjpeg_utils.keymatch(arg, "verbose", 1))
{
/* Enable debug printouts. */
/* On first -d, print version identification */
if (!printed_version)
{
Console.Write(string.Format("Bit Miracle's DJPEG, version {0}\n{1}\n", jpeg_common_struct.Version, jpeg_common_struct.Copyright));
printed_version = true;
}
cinfo.Err.Trace_level++;
}
else if (cdjpeg_utils.keymatch(arg, "fast", 1))
{
/* Select recommended processing options for quick-and-dirty output. */
cinfo.Two_pass_quantize = false;
cinfo.Dither_mode = J_DITHER_MODE.JDITHER_ORDERED;
if (!cinfo.Quantize_colors) /* don't override an earlier -colors */
cinfo.Desired_number_of_colors = 216;
cinfo.Dct_method = JpegConstants.JDCT_FASTEST;
cinfo.Do_fancy_upsampling = false;
}
else if (cdjpeg_utils.keymatch(arg, "grayscale", 2) || cdjpeg_utils.keymatch(arg, "greyscale", 2))
{
/* Force monochrome output. */
cinfo.Out_color_space = J_COLOR_SPACE.JCS_GRAYSCALE;
}
else if (cdjpeg_utils.keymatch(arg, "nosmooth", 3))
{
/* Suppress fancy upsampling */
cinfo.Do_fancy_upsampling = false;
}
else if (cdjpeg_utils.keymatch(arg, "onepass", 3))
{
/* Use fast one-pass quantization. */
cinfo.Two_pass_quantize = false;
}
else if (cdjpeg_utils.keymatch(arg, "os2", 3))
{
/* BMP output format (OS/2 flavor). */
requested_fmt = IMAGE_FORMATS.FMT_OS2;
}
else if (cdjpeg_utils.keymatch(arg, "outfile", 4))
{
/* Set output file name. */
if (++argn >= argv.Length) /* advance to next argument */
return false;
outfilename = argv[argn]; /* save it away for later use */
}
else if (cdjpeg_utils.keymatch(arg, "scale", 1))
{
/* Scale the output image by a fraction M/N. */
if (++argn >= argv.Length) /* advance to next argument */
return false;
int slashPos = argv[argn].IndexOf('/');
if (slashPos == -1)
return false;
try
{
string num = argv[argn].Substring(0, slashPos);
cinfo.Scale_num = int.Parse(num);
string denom = argv[argn].Substring(slashPos + 1);
cinfo.Scale_denom = int.Parse(denom);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
return false;
}
}
else /* bogus switch */
return false;
}
return true;
}
/// <summary>
/// Marker processor for COM and interesting APPn markers.
/// This replaces the library's built-in processor, which just skips the marker.
/// We want to print out the marker as text, to the extent possible.
/// Note this code relies on a non-suspending data source.
/// </summary>
static bool printTextMarker(jpeg_decompress_struct cinfo)
{
bool traceit = (cinfo.Err.Trace_level >= 1);
int length = jpeg_getc(cinfo) << 8;
length += jpeg_getc(cinfo);
length -= 2; /* discount the length word itself */
if (traceit)
{
if (cinfo.Unread_marker == (int)JPEG_MARKER.COM)
{
Console.WriteLine("Comment, length {0}:", length);
}
else
{
/* assume it is an APPn otherwise */
Console.WriteLine("APP{0}, length {1}:", cinfo.Unread_marker - JPEG_MARKER.APP0, length);
}
}
int lastch = 0;
while (--length >= 0)
{
int ch = jpeg_getc(cinfo);
if (traceit)
{
/* Emit the character in a readable form.
* Nonprintables are converted to \nnn form,
* while \ is converted to \\.
* Newlines in CR, CR/LF, or LF form will be printed as one newline.
*/
if (ch == '\r')
{
Console.WriteLine();
}
else if (ch == '\n')
{
if (lastch != '\r')
Console.WriteLine();
}
else if (ch == '\\')
{
Console.Write("\\\\");
}
else if (!Char.IsControl((char)ch))
{
Console.Write(ch);
}
else
{
Console.Write(encodeOctalString(ch));
}
lastch = ch;
}
}
if (traceit)
Console.WriteLine();
return true;
}
private bool TIFFjpeg_create_decompress()
{
/* initialize JPEG error handling */
try
{
m_decompression = new jpeg_decompress_struct(new JpegErrorManager(this));
m_common = m_decompression;
}
catch (Exception)
{
return false;
}
return true;
}
/// <summary>
/// Read next byte
/// </summary>
static int jpeg_getc(jpeg_decompress_struct decompressor)
{
int v;
if (!decompressor.Src.GetByte(out v))
decompressor.ERREXIT(J_MESSAGE_CODE.JERR_CANT_SUSPEND);
return v;
}
public static string IncImageDCT(string fullPath)
{
string suffix = "testDCT";
var img = new Bitmap(fullPath);
var width = img.Width;
var height = img.Height;
int hd = height / 8;
int wd = width / 8;
img.Dispose();
BitMiracle.LibJpeg.Classic.jpeg_decompress_struct oJpegDecompress = new BitMiracle.LibJpeg.Classic.jpeg_decompress_struct();
System.IO.FileStream oFileStreamImage = new System.IO.FileStream(fullPath, System.IO.FileMode.Open, System.IO.FileAccess.Read);
oJpegDecompress.jpeg_stdio_src(oFileStreamImage);
oJpegDecompress.jpeg_read_header(true);
BitMiracle.LibJpeg.Classic.jvirt_array<BitMiracle.LibJpeg.Classic.JBLOCK>[] JBlock = oJpegDecompress.jpeg_read_coefficients();
var block = JBlock[0].Access(0, hd); // accessing the element
for (int i = 0; i < hd; i++)
{
for (int j = 0; j < wd; j++)
{
short t = block[i][j].data[0];
if ((t >= 0 && t % 2 == 1) || (t < 0 && t % 2 == 0))
{
t--;
}
else if ((t >= 0 && t % 2 == 0) || (t < 0 && t % 2 == 1))
{
t++;
}
block[i][j].data[0] = t;
}
}
oJpegDecompress.jpeg_finish_decompress();
oFileStreamImage.Close();
////
string filenameNew = MyHelper.AppendFileName(fullPath, suffix);
System.IO.FileStream objFileStreamMegaMap = System.IO.File.Create(filenameNew);
BitMiracle.LibJpeg.Classic.jpeg_compress_struct oJpegCompress = new BitMiracle.LibJpeg.Classic.jpeg_compress_struct();
oJpegCompress.jpeg_stdio_dest(objFileStreamMegaMap);
oJpegDecompress.jpeg_copy_critical_parameters(oJpegCompress);
oJpegCompress.Image_height = height;
oJpegCompress.Image_width = width;
oJpegCompress.jpeg_write_coefficients(JBlock);
oJpegCompress.jpeg_finish_compress();
objFileStreamMegaMap.Close();
oJpegDecompress.jpeg_abort_decompress();
return filenameNew;
}