bool CxImageJPG::Encode(CxFile * hFile)
{
if (EncodeSafeCheck(hFile)) return false;
if (head.biClrUsed!=0 && !IsGrayScale()){
strcpy(info.szLastError,"JPEG can save only RGB or GreyScale images");
return false;
}
/* This struct contains the JPEG compression parameters and pointers to
* working space (which is allocated as needed by the JPEG library).
* It is possible to have several such structures, representing multiple
* compression/decompression processes, in existence at once. We refer
* to any one struct (and its associated working data) as a "JPEG object".
*/
struct jpeg_compress_struct cinfo;
/* This struct represents a JPEG error handler. It is declared separately
* because applications often want to supply a specialized error handler
* (see the second half of this file for an example). But here we just
* take the easy way out and use the standard error handler, which will
* print a message on stderr and call exit() if compression fails.
* Note that this struct must live as long as the main JPEG parameter
* struct, to avoid dangling-pointer problems.
*/
//struct jpeg_error_mgr jerr;
/* We use our private extension JPEG error handler. <CSC> */
struct ima_error_mgr jerr;
jerr.buffer=info.szLastError;
/* More stuff */
int row_stride; /* physical row width in image buffer */
JSAMPARRAY buffer; /* Output row buffer */
/* Step 1: allocate and initialize JPEG compression object */
/* We have to set up the error handler first, in case the initialization
* step fails. (Unlikely, but it could happen if you are out of memory.)
* This routine fills in the contents of struct jerr, and returns jerr's
* address which we place into the link field in cinfo.
*/
//cinfo.err = jpeg_std_error(&jerr); <CSC>
/* We set up the normal JPEG error routines, then override error_exit. */
cinfo.err = jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = ima_jpeg_error_exit;
/* Establish the setjmp return context for my_error_exit to use. */
if (setjmp(jerr.setjmp_buffer)) {
/* If we get here, the JPEG code has signaled an error.
* We need to clean up the JPEG object, close the input file, and return.
*/
strcpy(info.szLastError, jerr.buffer); //<CSC>
jpeg_destroy_compress(&cinfo);
return 0;
}
/* Now we can initialize the JPEG compression object. */
jpeg_create_compress(&cinfo);
/* Step 2: specify data destination (eg, a file) */
/* Note: steps 2 and 3 can be done in either order. */
/* Here we use the library-supplied code to send compressed data to a
* stdio stream. You can also write your own code to do something else.
* VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
* requires it in order to write binary files.
*/
//jpeg_stdio_dest(&cinfo, outfile);
CxFileJpg dest(hFile);
cinfo.dest = &dest;
/* Step 3: set parameters for compression */
/* First we supply a description of the input image.
* Four fields of the cinfo struct must be filled in:
*/
cinfo.image_width = GetWidth(); // image width and height, in pixels
cinfo.image_height = GetHeight();
if (IsGrayScale()){
cinfo.input_components = 1; // # of color components per pixel
cinfo.in_color_space = JCS_GRAYSCALE; /* colorspace of input image */
} else {
cinfo.input_components = 3; // # of color components per pixel
cinfo.in_color_space = JCS_RGB; /* colorspace of input image */
}
/* Now use the library's routine to set default compression parameters.
* (You must set at least cinfo.in_color_space before calling this,
* since the defaults depend on the source color space.)
*/
jpeg_set_defaults(&cinfo);
/* Now you can set any non-default parameters you wish to.
* Here we just illustrate the use of quality (quantization table) scaling:
*/
//jpeg_set_quality(&cinfo, info.nQuality, TRUE /* limit to baseline-JPEG values */);
#ifdef C_ARITH_CODING_SUPPORTED
if ((GetCodecOption() & ENCODE_ARITHMETIC) != 0)
cinfo.arith_code = TRUE;
#endif
#ifdef ENTRPY_OPT_SUPPORTED
if ((GetCodecOption() & ENCODE_OPTIMIZE) != 0)
cinfo.optimize_coding = TRUE;
#endif
if ((GetCodecOption() & ENCODE_GRAYSCALE) != 0)
jpeg_set_colorspace(&cinfo, JCS_GRAYSCALE);
if ((GetCodecOption() & ENCODE_SMOOTHING) != 0)
cinfo.smoothing_factor = m_nSmoothing;
jpeg_set_quality(&cinfo, GetJpegQuality(), (GetCodecOption() & ENCODE_BASELINE) != 0);
#ifdef C_PROGRESSIVE_SUPPORTED
if ((GetCodecOption() & ENCODE_PROGRESSIVE) != 0)
jpeg_simple_progression(&cinfo);
#endif
#ifdef C_LOSSLES_SUPPORTED
if ((GetCodecOption() & ENCODE_LOSSLESS) != 0)
jpeg_simple_lossless(&cinfo, m_nPredictor, m_nPointTransform);
#endif
cinfo.density_unit=1;
cinfo.X_density=(unsigned short)GetXDPI();
cinfo.Y_density=(unsigned short)GetYDPI();
/* Step 4: Start compressor */
/* TRUE ensures that we will write a complete interchange-JPEG file.
* Pass TRUE unless you are very sure of what you're doing.
*/
jpeg_start_compress(&cinfo, TRUE);
/* Step 5: while (scan lines remain to be written) */
/* jpeg_write_scanlines(...); */
/* Here we use the library's state variable cinfo.next_scanline as the
* loop counter, so that we don't have to keep track ourselves.
* To keep things simple, we pass one scanline per call; you can pass
* more if you wish, though.
*/
row_stride = info.dwEffWidth; /* JSAMPLEs per row in image_buffer */
//<DP> "8+row_stride" fix heap deallocation problem during debug???
buffer = (*cinfo.mem->alloc_sarray)
((j_common_ptr) &cinfo, JPOOL_IMAGE, 8+row_stride, 1);
CImageIterator iter(this);
iter.Upset();
while (cinfo.next_scanline < cinfo.image_height) {
// info.nProgress = (long)(100*cinfo.next_scanline/cinfo.image_height);
iter.GetRow(buffer[0], row_stride);
// not necessary if swapped red and blue definition in jmorecfg.h;ln322 <W. Morrison>
if (head.biClrUsed==0){ // swap R & B for RGB images
RGBtoBGR(buffer[0], row_stride); // Lance : 1998/09/01 : Bug ID: EXP-2.1.1-9
}
iter.PrevRow();
(void) jpeg_write_scanlines(&cinfo, buffer, 1);
}
/* Step 6: Finish compression */
jpeg_finish_compress(&cinfo);
/* Step 7: release JPEG compression object */
/* This is an important step since it will release a good deal of memory. */
jpeg_destroy_compress(&cinfo);
/* And we're done! */
return true;
}
bool CxImageJPG::Decode(CxFile * hFile)
{
bool is_exif = false;
#if CXIMAGEJPG_SUPPORT_EXIF
is_exif = DecodeExif(hFile);
#endif
CImageIterator iter(this);
/* This struct contains the JPEG decompression parameters and pointers to
* working space (which is allocated as needed by the JPEG library).
*/
struct jpeg_decompress_struct cinfo;
/* We use our private extension JPEG error handler. <CSC> */
struct ima_error_mgr jerr;
jerr.buffer=info.szLastError;
/* More stuff */
JSAMPARRAY buffer; /* Output row buffer */
int row_stride; /* physical row width in output buffer */
/* In this example we want to open the input file before doing anything else,
* so that the setjmp() error recovery below can assume the file is open.
* VERY IMPORTANT: use "b" option to fopen() if you are on a machine that
* requires it in order to read binary files.
*/
/* Step 1: allocate and initialize JPEG decompression object */
/* We set up the normal JPEG error routines, then override error_exit. */
cinfo.err = jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = ima_jpeg_error_exit;
/* Establish the setjmp return context for my_error_exit to use. */
if (setjmp(jerr.setjmp_buffer)) {
/* If we get here, the JPEG code has signaled an error.
* We need to clean up the JPEG object, close the input file, and return.
*/
jpeg_destroy_decompress(&cinfo);
return 0;
}
/* Now we can initialize the JPEG decompression object. */
jpeg_create_decompress(&cinfo);
/* Step 2: specify data source (eg, a file) */
//jpeg_stdio_src(&cinfo, infile);
CxFileJpg src(hFile);
cinfo.src = &src;
/* Step 3: read file parameters with jpeg_read_header() */
(void) jpeg_read_header(&cinfo, TRUE);
/* Step 4 <chupeev> handle decoder options*/
if ((GetCodecOption() & DECODE_GRAYSCALE) != 0)
cinfo.out_color_space = JCS_GRAYSCALE;
if ((GetCodecOption() & DECODE_QUANTIZE) != 0) {
cinfo.quantize_colors = TRUE;
cinfo.desired_number_of_colors = info.nQuality;
}
if ((GetCodecOption() & DECODE_DITHER) != 0)
cinfo.dither_mode = m_nDither;
if ((GetCodecOption() & DECODE_ONEPASS) != 0)
cinfo.two_pass_quantize = FALSE;
if ((GetCodecOption() & DECODE_NOSMOOTH) != 0)
cinfo.do_fancy_upsampling = FALSE;
//<DP>: Load true color images as RGB (no quantize)
/* Step 4: set parameters for decompression */
/* if (cinfo.jpeg_color_space!=JCS_GRAYSCALE) {
* cinfo.quantize_colors = TRUE;
* cinfo.desired_number_of_colors = 128;
*}
*/ //</DP>
// Set the scale <ignacio>
cinfo.scale_denom = info.nScale;
// Borrowed the idea from GIF implementation <ignacio>
if (info.nEscape == -1) {
// Return output dimensions only
jpeg_calc_output_dimensions(&cinfo);
head.biWidth = cinfo.output_width;
head.biHeight = cinfo.output_height;
jpeg_destroy_decompress(&cinfo);
return true;
}
/* Step 5: Start decompressor */
jpeg_start_decompress(&cinfo);
/* We may need to do some setup of our own at this point before reading
* the data. After jpeg_start_decompress() we have the correct scaled
* output image dimensions available, as well as the output colormap
* if we asked for color quantization.
*/
//Create the image using output dimensions <ignacio>
//Create(cinfo.image_width, cinfo.image_height, 8*cinfo.output_components, CXIMAGE_FORMAT_JPG);
Create(cinfo.output_width, cinfo.output_height, 8*cinfo.output_components, CXIMAGE_FORMAT_JPG);
if (!pDib) longjmp(jerr.setjmp_buffer, 1); //<DP> check if the image has been created
if (is_exif){
#if CXIMAGEJPG_SUPPORT_EXIF
if ((m_exifinfo.Xresolution != 0.0) && (m_exifinfo.ResolutionUnit != 0))
SetXDPI((long)(m_exifinfo.Xresolution/m_exifinfo.ResolutionUnit));
if ((m_exifinfo.Yresolution != 0.0) && (m_exifinfo.ResolutionUnit != 0))
SetYDPI((long)(m_exifinfo.Yresolution/m_exifinfo.ResolutionUnit));
#endif
} else {
if (cinfo.density_unit==2){
SetXDPI((long)floor(cinfo.X_density * 254.0 / 10000.0 + 0.5));
SetYDPI((long)floor(cinfo.Y_density * 254.0 / 10000.0 + 0.5));
} else {
SetXDPI(cinfo.X_density);
SetYDPI(cinfo.Y_density);
}
}
if (cinfo.out_color_space==JCS_GRAYSCALE){
SetGrayPalette();
head.biClrUsed =256;
} else {
if (cinfo.quantize_colors==TRUE){
SetPalette(cinfo.actual_number_of_colors, cinfo.colormap[0], cinfo.colormap[1], cinfo.colormap[2]);
head.biClrUsed=cinfo.actual_number_of_colors;
} else {
head.biClrUsed=0;
}
}
/* JSAMPLEs per row in output buffer */
row_stride = cinfo.output_width * cinfo.output_components;
/* Make a one-row-high sample array that will go away when done with image */
buffer = (*cinfo.mem->alloc_sarray)
((j_common_ptr) &cinfo, JPOOL_IMAGE, row_stride, 1);
/* Step 6: while (scan lines remain to be read) */
/* jpeg_read_scanlines(...); */
/* Here we use the library's state variable cinfo.output_scanline as the
* loop counter, so that we don't have to keep track ourselves.
*/
iter.Upset();
while (cinfo.output_scanline < cinfo.output_height) {
if (info.nEscape) longjmp(jerr.setjmp_buffer, 1); // <vho> - cancel decoding
(void) jpeg_read_scanlines(&cinfo, buffer, 1);
// info.nProgress = (long)(100*cinfo.output_scanline/cinfo.output_height);
//<DP> Step 6a: CMYK->RGB */
if ((cinfo.num_components==4)&&(cinfo.quantize_colors==FALSE)){
BYTE k,*dst,*src;
dst=iter.GetRow();
src=buffer[0];
for(long x3=0,x4=0; x3<(long)info.dwEffWidth && x4<row_stride; x3+=3, x4+=4){
k=src[x4+3];
dst[x3] =(BYTE)((k * src[x4+2])/255);
dst[x3+1]=(BYTE)((k * src[x4+1])/255);
dst[x3+2]=(BYTE)((k * src[x4+0])/255);
}
} else {
/* Assume put_scanline_someplace wants a pointer and sample count. */
iter.SetRow(buffer[0], row_stride);
}
iter.PrevRow();
}
/* Step 7: Finish decompression */
(void) jpeg_finish_decompress(&cinfo);
/* We can ignore the return value since suspension is not possible
* with the stdio data source.
*/
//<DP> Step 7A: Swap red and blue components
// not necessary if swapped red and blue definition in jmorecfg.h;ln322 <W. Morrison>
if ((cinfo.num_components==3)&&(cinfo.quantize_colors==FALSE)){
BYTE* r0=GetBits();
for(long y=0;y<head.biHeight;y++){
if (info.nEscape) longjmp(jerr.setjmp_buffer, 1); // <vho> - cancel decoding
RGBtoBGR(r0,3*head.biWidth);
r0+=info.dwEffWidth;
}
}
/* Step 8: Release JPEG decompression object */
/* This is an important step since it will release a good deal of memory. */
jpeg_destroy_decompress(&cinfo);
/* At this point you may want to check to see whether any corrupt-data
* warnings occurred (test whether jerr.pub.num_warnings is nonzero).
*/
/* And we're done! */
return true;
}
bool CxImageRAW::Decode(CxFile *hFile)
{
return false;
#if 0
if (hFile==NULL)
return false;
if (mutexInitialized == false)
{
#ifdef _LINUX
pthread_mutex_init(&rawMutex, 0);
#else
rawMutex = ::CreateMutex(NULL, false, NULL);
#endif
mutexInitialized = true;
}
#ifdef _LINUX
pthread_mutex_lock(&rawMutex);
#else
::WaitForSingleObject(rawMutex, INFINITE);
#endif
DCRAW dcr;
cx_try
{
// initialization
dcr_init_dcraw(&dcr);
dcr.opt.user_qual = GetCodecOption(CXIMAGE_FORMAT_RAW) & 0x03;
// setup variables for debugging
char szClass[] = "CxImageRAW";
dcr.ifname = szClass;
dcr.sz_error = info.szLastError;
// setup library options, see dcr_print_manual for the available switches
// call dcr_parse_command_line_options(&dcr,0,0,0) to set default options
// if (dcr_parse_command_line_options(&dcr,argc,argv,&arg))
if (dcr_parse_command_line_options(&dcr,0,0,0)){
cx_throw("CxImageRAW: unknown option");
}
// set return point for error handling
if (setjmp (dcr.failure)) {
cx_throw("");
}
// install file manager
CxFileRaw src(hFile,&dcr);
// check file header
dcr_identify(&dcr);
if(!dcr.is_raw){
cx_throw("CxImageRAW: not a raw image");
}
if (dcr.load_raw == NULL) {
cx_throw("CxImageRAW: missing raw decoder");
}
// verify special case
if (dcr.load_raw == dcr_kodak_ycbcr_load_raw) {
dcr.height += dcr.height & 1;
dcr.width += dcr.width & 1;
}
if (info.nEscape == -1){
head.biWidth = dcr.width;
head.biHeight= dcr.height;
info.dwType = CXIMAGE_FORMAT_RAW;
cx_throw("output dimensions returned");
}
// shrinked decoding available and requested?
dcr.shrink = dcr.filters && (dcr.opt.half_size || dcr.opt.threshold || dcr.opt.aber[0] != 1 || dcr.opt.aber[2] != 1);
dcr.iheight = (dcr.height + dcr.shrink) >> dcr.shrink;
dcr.iwidth = (dcr.width + dcr.shrink) >> dcr.shrink;
// install custom camera matrix
if (dcr.opt.use_camera_matrix && dcr.cmatrix[0][0] > 0.25) {
memcpy (dcr.rgb_cam, dcr.cmatrix, sizeof dcr.cmatrix);
dcr.raw_color = 0;
}
else {
dcr.opt.use_camera_wb = 1;
}
// allocate memory for the image
dcr.image = (ushort (*)[4]) calloc (dcr.iheight*dcr.iwidth, sizeof *dcr.image);
dcr_merror (&dcr, dcr.image, szClass);
if (dcr.meta_length) {
dcr.meta_data = (char *) malloc (dcr.meta_length);
dcr_merror (&dcr, dcr.meta_data, szClass);
}
// start image decoder
hFile->Seek(dcr.data_offset, SEEK_SET);
(*dcr.load_raw)(&dcr);
// post processing
if (dcr.zero_is_bad) dcr_remove_zeroes(&dcr);
dcr_bad_pixels(&dcr,NULL);
if (dcr.opt.dark_frame) dcr_subtract (&dcr,dcr.opt.dark_frame);
dcr.quality = 2 + !dcr.fuji_width;
if (dcr.opt.user_qual >= 0) dcr.quality = dcr.opt.user_qual;
if (dcr.opt.user_black >= 0) dcr.black = dcr.opt.user_black;
#ifdef COLORCHECK
dcr_colorcheck(&dcr);
#endif
#if RESTRICTED
if (dcr.is_foveon && !dcr.opt.document_mode) dcr_foveon_interpolate(&dcr);
#endif
if (!dcr.is_foveon && dcr.opt.document_mode < 2) dcr_scale_colors(&dcr);
// pixel interpolation and filters
dcr_pre_interpolate(&dcr);
if (dcr.filters && !dcr.opt.document_mode) {
if (dcr.quality == 0)
dcr_lin_interpolate(&dcr);
else if (dcr.quality == 1 || dcr.colors > 3)
dcr_vng_interpolate(&dcr);
else if (dcr.quality == 2)
dcr_ppg_interpolate(&dcr);
else
dcr_ahd_interpolate(&dcr);
}
if (dcr.mix_green) {
long i;
for (dcr.colors=3, i=0; i < dcr.height*dcr.width; i++) {
dcr.image[i][1] = (dcr.image[i][1] + dcr.image[i][3]) >> 1;
}
}
if (!dcr.is_foveon && dcr.colors == 3) dcr_median_filter(&dcr);
if (!dcr.is_foveon && dcr.opt.highlight == 2) dcr_blend_highlights(&dcr);
if (!dcr.is_foveon && dcr.opt.highlight > 2) dcr_recover_highlights(&dcr);
if (dcr.opt.use_fuji_rotate) dcr_fuji_rotate(&dcr);
#ifndef NO_LCMS
if (dcr.opt.cam_profile) dcr_apply_profile (dcr.opt.cam_profile, dcr.opt.out_profile);
#endif
// final conversion
dcr_convert_to_rgb(&dcr);
if (dcr.opt.use_fuji_rotate) dcr_stretch(&dcr);
dcr.iheight = dcr.height;
dcr.iwidth = dcr.width;
if (dcr.flip & 4) SWAP(dcr.height,dcr.width);
// ready to transfer data from dcr.image
if (!Create(dcr.width,dcr.height,24,CXIMAGE_FORMAT_RAW)){
cx_throw("");
}
uchar *ppm = (uchar *) calloc (dcr.width, dcr.colors*dcr.opt.output_bps/8);
ushort *ppm2 = (ushort *) ppm;
dcr_merror (&dcr, ppm, szClass);
uchar lut[0x10000];
if (dcr.opt.output_bps == 8) dcr_gamma_lut (&dcr, lut);
long c, row, col, soff, rstep, cstep;
soff = dcr_flip_index (&dcr, 0, 0);
cstep = dcr_flip_index (&dcr, 0, 1) - soff;
rstep = dcr_flip_index (&dcr, 1, 0) - dcr_flip_index (&dcr, 0, dcr.width);
for (row=0; row < dcr.height; row++, soff += rstep) {
for (col=0; col < dcr.width; col++, soff += cstep) {
if (dcr.opt.output_bps == 8)
for (c=0; c < dcr.colors; c++) ppm [col*dcr.colors+c] = lut[dcr.image[soff][c]];
else
for (c=0; c < dcr.colors; c++) ppm2[col*dcr.colors+c] = dcr.image[soff][c];
}
if (dcr.opt.output_bps == 16 && !dcr.opt.output_tiff && htons(0x55aa) != 0x55aa)
#if defined(_LINUX) || defined(__APPLE__)
swab ((char*)ppm2, (char*)ppm2, dcr.width*dcr.colors*2);
#else
_swab ((char*)ppm2, (char*)ppm2, dcr.width*dcr.colors*2);
#endif
DWORD size = dcr.width * (dcr.colors*dcr.opt.output_bps/8);
RGBtoBGR(ppm,size);
memcpy(GetBits(dcr.height - 1 - row), ppm, min(size,GetEffWidth()));
}
free (ppm);
dcr_cleanup_dcraw(&dcr);
#ifdef _LINUX
pthread_mutex_unlock(&rawMutex);
#else
::ReleaseMutex(rawMutex);
#endif
} cx_catch {
