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|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* From jpeg documentation
*
* Include file for users of JPEG library.
* You will need to have included system headers that define at least
* the typedefs FILE and size_t before you can include jpeglib.h.
* (stdio.h is sufficient on ANSI-conforming systems.)
* You may also wish to include "jerror.h".
*/
#include <stdio.h>
#include <stdlib.h>
#include <memory.h>
#include "jpeglib.h"
#include "jerror.h"
#include "H5private.h"
#include "h5tools.h"
#include "h5tools_utils.h"
#include "h5trav.h"
#include "H5IMpublic.h"
const char *progname = "h52jpeg";
int d_status = EXIT_SUCCESS;
/* command-line options: The user can specify short or long-named parameters */
static const char *s_opts = "hVvi:cp:";
static struct long_options l_opts[] = {
{ "help", no_arg, 'h' },
{ "version", no_arg, 'V' },
{ "verbose", no_arg, 'v' },
{ "image", require_arg, 'i' },
{ "convert", no_arg, 'c' },
{ "palette", require_arg, 'p' },
{ NULL, 0, '\0' }
};
/* a structure that contains h52jpeg options */
typedef struct
{
const char *file_name;
const char *template_name;
const char *image_name;
int image_type;
int convert_true;
int idx_palette;
int verbose;
} h52jpeg_opt_t;
/* prototypes */
static void usage(const char *prog);
static int h52jpeg(h52jpeg_opt_t opt);
static void make_jpeg_name( const char* template_name, const char* image_name, char* jpeg_name);
static int do_object(hid_t fid, h52jpeg_opt_t opt, const char* image_name);
static int do_image(hid_t fid, h52jpeg_opt_t opt, const char* image_name, char* jpeg_name);
static void write_JPEG_file(char *filename, JSAMPLE *image_buffer, int image_height, int image_width, int planes);
static void convert_to_true( hsize_t width, hsize_t height, unsigned char* ibuf, unsigned char* pbuf, unsigned char* tbuf);
/*-------------------------------------------------------------------------
* Function: main
*
* Purpose: h52jpeg main program
*
* Programmer: Pedro Vicente, pvn@hdfgroup.org
*
* Date: May 30, 2008
*
*-------------------------------------------------------------------------
*/
int main(int argc, const char *argv[])
{
h52jpeg_opt_t opt;
int op;
/* initialze options to 0 */
memset(&opt,0,sizeof(h52jpeg_opt_t));
/* parse command line options */
while ((op = get_option(argc, argv, s_opts, l_opts)) != EOF)
{
switch ((char)op)
{
case 'h':
usage(progname);
exit(EXIT_SUCCESS);
case 'V':
print_version(progname);
exit(EXIT_SUCCESS);
case 'v':
opt.verbose = 1;
break;
case 'i':
opt.image_name = opt_arg;
break;
case 'c':
opt.convert_true = 1;
break;
case 'p':
opt.idx_palette = atoi(opt_arg);
break;
} /* switch */
} /* while */
/* check for file names to be processed */
if ( argv[ opt_ind ] != NULL && argv[ opt_ind + 1 ] != NULL )
{
opt.file_name = argv[ opt_ind ];
opt.template_name = argv[ opt_ind + 1 ];
}
else
{
usage(progname);
exit(EXIT_FAILURE);
}
if ( h52jpeg(opt) < 0 )
return 1;
return 0;
}
/*-------------------------------------------------------------------------
* Function: usage
*
* Purpose: print usage
*
* Return: void
*
*-------------------------------------------------------------------------
*/
static void usage(const char *prog)
{
printf("usage: %s [OPTIONS] file template\n", prog);
printf(" file HDF5 file name\n");
printf(" template Name template for jpeg images\n");
printf(" OPTIONS\n");
printf(" -h, --help Print a usage message and exit\n");
printf(" -v, --verbose Verbose mode, print object information\n");
printf(" -V, --version Print HDF5 version number and exit\n");
printf(" -i, --image Image name (full path in HDF5 file)\n");
printf(" -c, --convert Convert image from graycolor to truecolor\n");
printf(" -p P, --palette=P Use HDF5 palette index P in conversion -c\n");
printf("\n");
printf(" P - is an integer, the palette index in the HDF5 image. Default is 0\n");
}
/*-------------------------------------------------------------------------
* Function: h52jpeg
*
* Parameters: OPT, options at command line
*
* Purpose: traverse the HDF5 file, save HDF5 images to jpeg files, translate
* 2D datasets of classes H5T_INTEGER and H5T_FLOAT to image data and save them
* to jpeg files
*
* Return: 0, all is fine, -1 not all is fine
*
*-------------------------------------------------------------------------
*/
static int h52jpeg(h52jpeg_opt_t opt)
{
hid_t fid;
trav_table_t *travt = NULL;
size_t i;
/* open the HDF5 file */
if (( fid = h5tools_fopen(opt.file_name, H5F_ACC_RDONLY, H5P_DEFAULT, NULL, NULL, (size_t)0)) < 0)
{
error_msg(progname, "cannot open file <%s>\n", opt.file_name );
return -1;
}
/*-------------------------------------------------------------------------
* object name was specified at command line
*-------------------------------------------------------------------------
*/
if ( opt.image_name )
{
/* read object, save jpeg image */
do_object(fid, opt, opt.image_name);
}
/*-------------------------------------------------------------------------
* object name was not specified; traverse the file
*-------------------------------------------------------------------------
*/
else
{
/* initialize traversal table */
trav_table_init(&travt);
/* get the list of objects in the file */
if ( h5trav_gettable(fid, travt) < 0 )
goto out;
/* search for images/datasets in file */
for ( i = 0; i < travt->nobjs; i++)
{
switch ( travt->objs[i].type )
{
default:
goto out;
case H5TRAV_TYPE_GROUP:
case H5TRAV_TYPE_NAMED_DATATYPE:
case H5TRAV_TYPE_LINK:
case H5TRAV_TYPE_UDLINK:
break;
case H5TRAV_TYPE_DATASET:
/* read object, save jpeg image */
do_object(fid, opt, travt->objs[i].name);
break; /* H5TRAV_TYPE_DATASET */
} /* switch */
} /* i */
/* free table */
trav_table_free(travt);
} /* opt.image_name */
/* close */
if ( H5Fclose(fid) < 0 )
return -1;
return 0;
out:
H5E_BEGIN_TRY
{
H5Fclose(fid);
} H5E_END_TRY;
return -1;
}
/*-------------------------------------------------------------------------
* Function: do_object
*
* Parameters: HDF5 file id, command line options, an object name
*
* Purpose: read HDF5 object, save jpeg image
*
* Return: 0, all is fine, -1 not all is fine
*
*-------------------------------------------------------------------------
*/
static
int do_object(hid_t fid, h52jpeg_opt_t opt, const char* object_name)
{
int done=0; /* return value from do_image */
char jpeg_name[1024];
/* build the jpeg file name */
make_jpeg_name( opt.template_name, object_name, jpeg_name);
if ( opt.verbose)
{
printf("%s ...", object_name );
}
/*-------------------------------------------------------------------------
* HDF5 Image
*-------------------------------------------------------------------------
*/
if ( H5IMis_image( fid, object_name ) )
{
/* read image, save jpeg image */
done = do_image(fid, opt, object_name, jpeg_name);
}
/*-------------------------------------------------------------------------
* HDF5 Image palette, ignore
*-------------------------------------------------------------------------
*/
else if ( H5IMis_palette( fid, object_name ) )
{
}
/*-------------------------------------------------------------------------
* regular dataset
*-------------------------------------------------------------------------
*/
else
{
} /* else */
if ( opt.verbose)
{
if ( done )
{
printf("saved to %s\n", jpeg_name );
}
else
{
printf("\n");
}
}
return 0;
}
/*-------------------------------------------------------------------------
* Function: do_image
*
* Parameters: HDF5 file id, command line options, an image name
*
* Purpose: read HDF5 image, save jpeg image
*
* Return: 0, all is fine, -1 not all is fine
*
*-------------------------------------------------------------------------
*/
static
int do_image(hid_t fid, h52jpeg_opt_t opt, const char* image_name, char* jpeg_name)
{
hsize_t width;
hsize_t height;
hsize_t planes;
char interlace[20];
hssize_t npals;
const char* name;
int done;
unsigned char* ibuf=NULL;
name = image_name;
done = 0;
if ( H5IMget_image_info( fid, name, &width, &height, &planes, interlace, &npals ) < 0 )
goto out;
if (NULL == (ibuf = HDmalloc( (size_t)width * (size_t)height * (size_t)planes )))
goto out;
if ( H5IMread_image( fid, name, ibuf ) < 0 )
{
goto out;
}
/*-------------------------------------------------------------------------
* no conversion to true color requested or true color image, just save what we found
* this will result either in
*
* 24bit HDF5 ---> true color jpeg
* 8bit HDF5 ---> grey color jpeg
*
*-------------------------------------------------------------------------
*/
if ( planes == 3 || !opt.convert_true )
{
/* write the jpeg file */
write_JPEG_file (jpeg_name,
ibuf,
(int) height,
(int) width,
(int) planes);
done = 1;
}
/*-------------------------------------------------------------------------
* conversion to truecolor
* this will result in
*
* 8bit HDF5 ---> true color jpeg
*
*-------------------------------------------------------------------------
*/
else if (opt.convert_true && planes == 1 )
{
hsize_t pdims[2]; /* palette dimensions */
unsigned char *pbuf=NULL;/* palette array */
unsigned char *tbuf=NULL;/* true color array */
int ipal; /* palette to use */
if ( H5IMget_npalettes( fid, name, &npals ) < 0 )
{
goto out;
}
/*-------------------------------------------------------------------------
* there are palettes
*-------------------------------------------------------------------------
*/
if ( npals > 0 )
{
/* use either the default (0) palette or a requested one */
ipal = ( opt.idx_palette > 0 ) ? opt.idx_palette : 0;
/* the requested palette may not exist . use the default */
if ( opt.idx_palette >= npals )
{
ipal = 0;
if ( opt.verbose )
{
printf("palette index <%d> does not exist. Using default...",
opt.idx_palette );
}
}
if ( H5IMget_palette_info( fid, name, ipal, pdims ) < 0 )
goto out;
if (NULL == (pbuf = HDmalloc( (size_t)pdims[0] * (size_t)pdims[1] )))
goto out;
if (NULL == (tbuf = HDmalloc( (size_t)width * (size_t)height * 3 )))
goto out;
if ( H5IMget_palette( fid, name, ipal, pbuf ) < 0 )
goto out;
/* convert indexed image to true color image */
convert_to_true(width, height, ibuf, pbuf, tbuf);
/* write the jpeg file */
write_JPEG_file (jpeg_name,
tbuf,
(int) height,
(int) width,
3);
done = 1;
free( pbuf );
free( tbuf );
pbuf = NULL;
tbuf = NULL;
}
/*-------------------------------------------------------------------------
* there are no palettes
*-------------------------------------------------------------------------
*/
else
{
done = 0;
if ( opt.verbose )
{
printf("image <%s> has no palette...", name );
}
} /* no palettes */
} /* conversion to truecolor */
free( ibuf );
ibuf = NULL;
return done;
out:
return -1;
}
/*-------------------------------------------------------------------------
* Function: make_jpeg_name
*
* Parameters: template name (IN), image name (IN), jpeg name (IN/OUT)
*
* Purpose: build a name for the jpeg image file upon a template name
* and the HDF5 image name. Replace the special characters
* "%", "@", "$", "/", ":", "&", and "*" with "_"
*
* Return: void
*
*-------------------------------------------------------------------------
*/
static
void make_jpeg_name( const char* template_name, const char* image_name, char* jpeg_name)
{
int j;
int len;
HDstrcpy( jpeg_name, template_name );
HDstrcat( jpeg_name, image_name );
HDstrcat( jpeg_name, ".jpeg" );
len = HDstrlen( jpeg_name);
/* HDF5 path names might contain '/', replace with '_' */
for (j = 0; j < len; j++)
{
if ( (jpeg_name[j] == '/') ||
(jpeg_name[j] == '%') ||
(jpeg_name[j] == '@') ||
(jpeg_name[j] == '$') ||
(jpeg_name[j] == '/') ||
(jpeg_name[j] == ':') ||
(jpeg_name[j] == '&') ||
(jpeg_name[j] == '*') )
{
jpeg_name[j] = '_';
}
}
}
/*-------------------------------------------------------------------------
* Function: convert_to_true
*
* Parameters:
*
* Purpose: convert a greycolor buffer to a true color using a palette buffer
*
* Return:
*
*-------------------------------------------------------------------------
*/
static
void convert_to_true( hsize_t width, hsize_t height, unsigned char* ibuf, unsigned char* pbuf, unsigned char* tbuf)
{
hsize_t i, j;
for ( i = 0, j = 0; i < width * height; i++, j += 3)
{
unsigned char idx;
unsigned char r;
unsigned char g;
unsigned char b;
/* get the index from the grey image */
idx = ibuf[i];
/* get the RGB color */
r = pbuf[3*idx];
g = pbuf[3*idx+1];
b = pbuf[3*idx+2];
/* define the color buffer */
tbuf[j] = r;
tbuf[j+1] = g;
tbuf[j+2] = b;
}
}
/*
* Sample routine for JPEG compression.
*
* IMAGE DATA FORMATS:
*
* The standard input image format is a rectangular array of pixels, with
* each pixel having the same number of "component" values (color channels).
* Each pixel row is an array of JSAMPLEs (which typically are unsigned chars).
* If you are working with color data, then the color values for each pixel
* must be adjacent in the row; for example, R,G,B,R,G,B,R,G,B,... for 24-bit
* RGB color.
*
* For this example, we'll assume that this data structure matches the way
* our application has stored the image in memory, so we can just pass a
* pointer to our image buffer.
*/
static
void write_JPEG_file(char *filename,
JSAMPLE *image_buffer, /* Points to large array of R,G,B-order data */
int image_height, /* Number of rows in image */
int image_width, /* Number of columns in image */
int planes) /* # of color components per pixel */
{
/* 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;
/* More stuff */
FILE * outfile; /* target file */
JSAMPROW row_pointer[1]; /* pointer to JSAMPLE row[s] */
int row_stride; /* physical row width in image 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);
/* 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.
*/
if ((outfile = fopen(filename, "wb")) == NULL) {
fprintf(stderr, "can't open %s\n", filename);
exit(1);
}
jpeg_stdio_dest(&cinfo, outfile);
/* 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 = image_width; /* image width and height, in pixels */
cinfo.image_height = image_height;
cinfo.input_components = planes; /* # of color components per pixel */
/* colorspace of input image */
if (planes == 3)
cinfo.in_color_space = JCS_RGB;
else if (planes == 1)
cinfo.in_color_space = JCS_GRAYSCALE;
/* 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, 100, TRUE /* limit to baseline-JPEG values */);
/* 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 = image_width * planes; /* JSAMPLEs per row in image_buffer */
while (cinfo.next_scanline < cinfo.image_height) {
/* jpeg_write_scanlines expects an array of pointers to scanlines.
* Here the array is only one element long, but you could pass
* more than one scanline at a time if that's more convenient.
*/
row_pointer[0] = & image_buffer[cinfo.next_scanline * row_stride];
(void) jpeg_write_scanlines(&cinfo, row_pointer, 1);
}
/* Step 6: Finish compression */
jpeg_finish_compress(&cinfo);
/* After finish_compress, we can close the output file. */
fclose(outfile);
/* 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! */
}
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