You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
413 lines
11 KiB
413 lines
11 KiB
//C- -------------------------------------------------------------------
|
|
//C- DjVuLibre-3.5
|
|
//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.
|
|
//C- Copyright (c) 2001 AT&T
|
|
//C-
|
|
//C- This software is subject to, and may be distributed under, the
|
|
//C- GNU General Public License, Version 2. The license should have
|
|
//C- accompanied the software or you may obtain a copy of the license
|
|
//C- from the Free Software Foundation at http://www.fsf.org .
|
|
//C-
|
|
//C- This program is distributed in the hope that it will be useful,
|
|
//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
//C- GNU General Public License for more details.
|
|
//C-
|
|
//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
|
|
//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech
|
|
//C- Software authorized us to replace the original DjVu(r) Reference
|
|
//C- Library notice by the following text (see doc/lizard2002.djvu):
|
|
//C-
|
|
//C- ------------------------------------------------------------------
|
|
//C- | DjVu (r) Reference Library (v. 3.5)
|
|
//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
|
|
//C- | The DjVu Reference Library is protected by U.S. Pat. No.
|
|
//C- | 6,058,214 and patents pending.
|
|
//C- |
|
|
//C- | This software is subject to, and may be distributed under, the
|
|
//C- | GNU General Public License, Version 2. The license should have
|
|
//C- | accompanied the software or you may obtain a copy of the license
|
|
//C- | from the Free Software Foundation at http://www.fsf.org .
|
|
//C- |
|
|
//C- | The computer code originally released by LizardTech under this
|
|
//C- | license and unmodified by other parties is deemed "the LIZARDTECH
|
|
//C- | ORIGINAL CODE." Subject to any third party intellectual property
|
|
//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
|
|
//C- | non-exclusive license to make, use, sell, or otherwise dispose of
|
|
//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
|
|
//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
|
|
//C- | General Public License. This grant only confers the right to
|
|
//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
|
|
//C- | the extent such infringement is reasonably necessary to enable
|
|
//C- | recipient to make, have made, practice, sell, or otherwise dispose
|
|
//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
|
|
//C- | any greater extent that may be necessary to utilize further
|
|
//C- | modifications or combinations.
|
|
//C- |
|
|
//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
|
|
//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
|
|
//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
|
|
//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
|
|
//C- +------------------------------------------------------------------
|
|
//
|
|
// $Id: JPEGDecoder.cpp,v 1.8 2003/11/07 22:08:22 leonb Exp $
|
|
// $Name: release_3_5_15 $
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
#if NEED_GNUG_PRAGMAS
|
|
# pragma implementation
|
|
#endif
|
|
|
|
#ifdef NEED_JPEG_DECODER
|
|
|
|
#include "JPEGDecoder.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
#undef HAVE_STDLIB_H
|
|
#undef HAVE_STDDEF_H
|
|
#include <stdio.h>
|
|
#include <jconfig.h>
|
|
#include <jpeglib.h>
|
|
#include <jerror.h>
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#include "ByteStream.h"
|
|
#include "GPixmap.h"
|
|
#ifdef LIBJPEGNAME
|
|
#include "DjVuDynamic.h"
|
|
#include "GString.h"
|
|
#endif // LIBJPEGNAME
|
|
|
|
|
|
|
|
#ifdef HAVE_NAMESPACES
|
|
namespace DJVU {
|
|
# ifdef NOT_DEFINED // Just to fool emacs c++ mode
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
|
|
class JPEGDecoder::Impl : public JPEGDecoder
|
|
{
|
|
public:
|
|
static void jpeg_byte_stream_src(j_decompress_ptr, ByteStream &);
|
|
};
|
|
|
|
extern "C"
|
|
{
|
|
|
|
struct djvu_error_mgr
|
|
{
|
|
struct jpeg_error_mgr pub; /* "public" fields */
|
|
|
|
jmp_buf setjmp_buffer; /* for return to caller */
|
|
};
|
|
|
|
typedef struct djvu_error_mgr * djvu_error_ptr;
|
|
|
|
METHODDEF(void)
|
|
djvu_error_exit (j_common_ptr cinfo)
|
|
{
|
|
/* cinfo->err really points to a djvu_error_mgr struct, so coerce pointer */
|
|
djvu_error_ptr djvuerr = (djvu_error_ptr) cinfo->err;
|
|
|
|
/* Always display the message. */
|
|
/* We could postpone this until after returning, if we chose. */
|
|
(*cinfo->err->output_message) (cinfo);
|
|
|
|
/* Return control to the setjmp point */
|
|
longjmp(djvuerr->setjmp_buffer, 1);
|
|
}
|
|
|
|
}
|
|
|
|
GP<GPixmap>
|
|
JPEGDecoder::decode(ByteStream & bs )
|
|
{
|
|
GP<GPixmap> retval=GPixmap::create();
|
|
G_TRY
|
|
{
|
|
decode(bs,*retval);
|
|
} G_CATCH_ALL
|
|
{
|
|
retval=0;
|
|
}
|
|
G_ENDCATCH;
|
|
return retval;
|
|
}
|
|
|
|
void
|
|
JPEGDecoder::decode(ByteStream & bs,GPixmap &pix)
|
|
{
|
|
struct jpeg_decompress_struct cinfo;
|
|
|
|
/* We use our private extension JPEG error handler. */
|
|
struct djvu_error_mgr jerr;
|
|
|
|
JSAMPARRAY buffer; /* Output row buffer */
|
|
int row_stride; /* physical row width in output buffer */
|
|
int full_buf_size;
|
|
int isGrey,i;
|
|
|
|
cinfo.err = jpeg_std_error(&jerr.pub);
|
|
|
|
jerr.pub.error_exit = djvu_error_exit;
|
|
|
|
if (setjmp(jerr.setjmp_buffer))
|
|
{
|
|
|
|
jpeg_destroy_decompress(&cinfo);
|
|
G_THROW( ERR_MSG("GPixmap.unk_PPM") );
|
|
}
|
|
|
|
jpeg_create_decompress(&cinfo);
|
|
|
|
Impl::jpeg_byte_stream_src(&cinfo, bs);
|
|
|
|
(void) jpeg_read_header(&cinfo, TRUE);
|
|
|
|
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.
|
|
* In this example, we need to make an output work buffer of the right size.
|
|
*/
|
|
|
|
/* JSAMPLEs per row in output buffer */
|
|
row_stride = cinfo.output_width * cinfo.output_components;
|
|
full_buf_size = row_stride * cinfo.output_height;
|
|
|
|
/* 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);
|
|
|
|
GP<ByteStream> goutputBlock=ByteStream::create();
|
|
ByteStream &outputBlock=*goutputBlock;
|
|
outputBlock.format("P6\n%d %d\n%d\n",cinfo.output_width,
|
|
cinfo.output_height,255);
|
|
|
|
isGrey = ( cinfo.out_color_space == JCS_GRAYSCALE) ? 1 : 0;
|
|
|
|
while (cinfo.output_scanline < cinfo.output_height)
|
|
{
|
|
(void) jpeg_read_scanlines(&cinfo, buffer, 1);
|
|
|
|
if ( isGrey == 1 )
|
|
{
|
|
for (i=0; i<row_stride; i++)
|
|
{
|
|
outputBlock.write8((char)buffer[0][i]);
|
|
outputBlock.write8((char)buffer[0][i]);
|
|
outputBlock.write8((char)buffer[0][i]);
|
|
}
|
|
}else
|
|
{
|
|
for (i=0; i<row_stride; i++)
|
|
outputBlock.write8((char)buffer[0][i]);
|
|
}
|
|
}
|
|
|
|
(void) jpeg_finish_decompress(&cinfo);
|
|
|
|
jpeg_destroy_decompress(&cinfo);
|
|
|
|
outputBlock.seek(0,SEEK_SET);
|
|
|
|
pix.init(outputBlock);
|
|
}
|
|
|
|
/*** From here onwards code is to make ByteStream as the data
|
|
source for the JPEG library */
|
|
|
|
extern "C"
|
|
{
|
|
|
|
typedef struct
|
|
{
|
|
struct jpeg_source_mgr pub; /* public fields */
|
|
|
|
ByteStream * byteStream; /* source stream */
|
|
JOCTET * buffer; /* start of buffer */
|
|
boolean start_of_stream;
|
|
} byte_stream_src_mgr;
|
|
|
|
|
|
typedef byte_stream_src_mgr * byte_stream_src_ptr;
|
|
|
|
#define INPUT_BUF_SIZE 4096
|
|
|
|
METHODDEF(void)
|
|
init_source (j_decompress_ptr cinfo)
|
|
{
|
|
byte_stream_src_ptr src = (byte_stream_src_ptr) cinfo->src;
|
|
|
|
src->start_of_stream = TRUE;
|
|
}
|
|
|
|
METHODDEF(boolean)
|
|
fill_input_buffer (j_decompress_ptr cinfo)
|
|
{
|
|
byte_stream_src_ptr src = (byte_stream_src_ptr) cinfo->src;
|
|
size_t nbytes;
|
|
|
|
nbytes = src->byteStream->readall(src->buffer, INPUT_BUF_SIZE);
|
|
|
|
if (nbytes <= 0)
|
|
{
|
|
if (src->start_of_stream) /* Treat empty input as fatal error */
|
|
ERREXIT(cinfo, JERR_INPUT_EMPTY);
|
|
WARNMS(cinfo, JWRN_JPEG_EOF);
|
|
/* Insert a fake EOI marker */
|
|
src->buffer[0] = (JOCTET) 0xFF;
|
|
src->buffer[1] = (JOCTET) JPEG_EOI;
|
|
nbytes = 2;
|
|
}
|
|
|
|
src->pub.next_input_byte = src->buffer;
|
|
src->pub.bytes_in_buffer = nbytes;
|
|
src->start_of_stream = FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
METHODDEF(void)
|
|
skip_input_data (j_decompress_ptr cinfo, long num_bytes)
|
|
{
|
|
byte_stream_src_ptr src = (byte_stream_src_ptr) cinfo->src;
|
|
|
|
if (num_bytes > (long) src->pub.bytes_in_buffer)
|
|
{
|
|
src->byteStream->seek((num_bytes - src->pub.bytes_in_buffer), SEEK_CUR);
|
|
(void) fill_input_buffer(cinfo);
|
|
}else
|
|
{
|
|
src->pub.bytes_in_buffer -= num_bytes;
|
|
src->pub.next_input_byte += num_bytes;
|
|
}
|
|
}
|
|
|
|
METHODDEF(void)
|
|
term_source (j_decompress_ptr cinfo)
|
|
{
|
|
/* no work necessary here */
|
|
}
|
|
|
|
}
|
|
|
|
void
|
|
JPEGDecoder::Impl::jpeg_byte_stream_src(j_decompress_ptr cinfo,ByteStream &bs)
|
|
{
|
|
byte_stream_src_ptr src;
|
|
|
|
if (cinfo->src == NULL)
|
|
{ /* first time for this JPEG object? */
|
|
cinfo->src = (struct jpeg_source_mgr *)
|
|
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
|
|
sizeof(byte_stream_src_mgr));
|
|
src = (byte_stream_src_ptr) cinfo->src;
|
|
src->buffer = (JOCTET *)
|
|
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
|
|
INPUT_BUF_SIZE * sizeof(JOCTET));
|
|
}
|
|
|
|
src = (byte_stream_src_ptr) cinfo->src;
|
|
src->pub.init_source = init_source;
|
|
src->pub.fill_input_buffer = fill_input_buffer;
|
|
src->pub.skip_input_data = skip_input_data;
|
|
src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
|
|
src->pub.term_source = term_source;
|
|
src->byteStream = &bs;
|
|
src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */
|
|
src->pub.next_input_byte = NULL; /* until buffer loaded */
|
|
}
|
|
|
|
#ifdef LIBJPEGNAME
|
|
void *
|
|
JPEGDecoder::jpeg_lookup(const GUTF8String &name)
|
|
{
|
|
static DjVuDynamic lib(GUTF8String(LIBJPEGNAME));
|
|
void *sym=lib.lookup(name);
|
|
if(!sym)
|
|
G_THROW(ERR_MSG("DjVuFile.JPEG_bg2"));
|
|
return sym;
|
|
}
|
|
|
|
jpeg_error_mgr *
|
|
JPEGDecoder::jpeg_std_error(jpeg_error_mgr *x)
|
|
{
|
|
static void *sym=jpeg_lookup("jpeg_std_error");
|
|
return ((jpeg_error_mgr *(*)(jpeg_error_mgr *))sym)(x);
|
|
}
|
|
|
|
void
|
|
JPEGDecoder::jpeg_CreateDecompress(jpeg_decompress_struct *x,int v, size_t s)
|
|
{
|
|
static void *sym=jpeg_lookup("jpeg_CreateDecompress");
|
|
((void (*)(jpeg_decompress_struct *,int,size_t))sym)(x,v,s);
|
|
}
|
|
|
|
void
|
|
JPEGDecoder::jpeg_destroy_decompress(j_decompress_ptr x)
|
|
{
|
|
static void *sym=jpeg_lookup("jpeg_destroy_decompress");
|
|
((void (*)(j_decompress_ptr))sym)(x);
|
|
}
|
|
|
|
int
|
|
JPEGDecoder::jpeg_read_header(j_decompress_ptr x,boolean y)
|
|
{
|
|
static void *sym=jpeg_lookup("jpeg_read_header");
|
|
return ((int (*)(j_decompress_ptr,boolean))sym)(x,y);
|
|
}
|
|
|
|
JDIMENSION
|
|
JPEGDecoder::jpeg_read_scanlines(j_decompress_ptr x,JSAMPARRAY y,JDIMENSION z)
|
|
{
|
|
static void *sym=jpeg_lookup("jpeg_read_scanlines");
|
|
return ((JDIMENSION (*)(j_decompress_ptr,JSAMPARRAY,JDIMENSION))sym)(x,y,z);
|
|
}
|
|
|
|
boolean
|
|
JPEGDecoder::jpeg_finish_decompress(j_decompress_ptr x)
|
|
{
|
|
static void *sym=jpeg_lookup("jpeg_finish_decompress");
|
|
return ((boolean (*)(j_decompress_ptr))sym)(x);
|
|
}
|
|
|
|
boolean
|
|
JPEGDecoder::jpeg_resync_to_restart(jpeg_decompress_struct *x,int d)
|
|
{
|
|
static void *sym=jpeg_lookup("jpeg_resync_to_restart");
|
|
return ((boolean (*)(jpeg_decompress_struct *,int))sym)(x,d);
|
|
}
|
|
|
|
boolean
|
|
JPEGDecoder::jpeg_start_decompress(j_decompress_ptr x)
|
|
{
|
|
static void *sym=jpeg_lookup("jpeg_start_decompress");
|
|
return ((boolean (*)(j_decompress_ptr))sym)(x);
|
|
}
|
|
|
|
#endif // LIBJPEGNAME
|
|
|
|
|
|
#ifdef HAVE_NAMESPACES
|
|
}
|
|
# ifndef NOT_USING_DJVU_NAMESPACE
|
|
using namespace DJVU;
|
|
# endif
|
|
#endif
|
|
|
|
#endif
|
|
|