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cpputils.cpp
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cpputils.cpp
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#include <windows.h>
#include <stdio.h>
#include <fstream>
#include <jpeglib.h>
#include "jpegoptim.h"
#include "modular.h"
using namespace std;
extern "C" char* read_all_bytes(char const* filename, size_t* length)
{
ifstream ifs(filename, ios::binary | ios::ate);
ifstream::pos_type pos = ifs.tellg();
*length = (size_t)pos;
char* result = (char*)malloc((size_t)pos);
if (result)
{
ifs.seekg(0, ios::beg);
ifs.read(result, pos);
}
return result;
}
extern "C" void write_all_bytes(char const* filename, char* data, int datalen)
{
ofstream ofs(filename, ios::binary | ios::ate);
ofs.write(data, datalen);
}
extern "C" void dprintf(char* fmt, ...)
{
char buf[4096];
va_list args;
va_start(args, fmt);
vsnprintf_s(buf, ARRAYSIZE(buf), _TRUNCATE, fmt, args);
va_end(args);
OutputDebugStringA(buf);
}
#if BUILD_STATIC_LIB
void lib_error_exit(j_common_ptr cinfo)
{
struct jpeg_error_mgr* myerr = (struct jpeg_error_mgr*)cinfo->err;
(*cinfo->err->output_message) (cinfo);
throw new std::exception("fatal error");
}
int global_error_counter;
void do_throw(const char* str)
{
throw new std::exception(str);
}
void fatal(const char *format, ...)
{
va_list args;
char buf[4096];
OutputDebugStringA(PROGRAMNAME ": ");
va_start(args,format);
vsnprintf_s(buf,ARRAYSIZE(buf), format, args);
va_end(args);
OutputDebugStringA("\r\n");
do_throw(buf);
}
void lib_output_message(j_common_ptr cinfo)
{
char buffer[JMSG_LENGTH_MAX + 1];
(*cinfo->err->format_message)((j_common_ptr)cinfo, buffer);
buffer[sizeof(buffer) - 1] = 0;
OutputDebugStringA(buffer);
global_error_counter++;
}
int call_jpegoptim(struct jpegoptim_options* options, unsigned char* inputbuf, size_t inputlen, unsigned char** outputbuf, size_t* outputlen)
{
struct jpeg_decompress_struct dinfo;
struct jpeg_compress_struct cinfo;
JSAMPARRAY buf = NULL;
jvirt_barray_ptr *coef_arrays = NULL;
int opt_index = 0;
size_t insize = 0, lastsize = 0;
unsigned char *outbuffer = NULL;
char *outfname = NULL;
int compress_err_count = 0;
int decompress_err_count = 0;
long average_count = 0;
double average_rate = 0.0, total_save = 0.0;
struct jpeg_error_mgr jderr, jcerr;
int quality = -1;
int save_exif = 1;
int save_iptc = 1;
int save_com = 1;
int save_icc = 1;
int save_xmp = 1;
int threshold = -1;
size_t target_size = 0;
int all_normal = options->all_normal;
int all_progressive = options->all_progressive;
int retry = 0;
/* initialize decompression object */
dinfo.err = jpeg_std_error(&jderr);
jpeg_create_decompress(&dinfo);
jderr.error_exit = lib_error_exit;
jderr.output_message = lib_output_message;
/* initialize compression object */
cinfo.err = jpeg_std_error(&jcerr);
jpeg_create_compress(&cinfo);
jcerr.error_exit = lib_error_exit;
jcerr.output_message = lib_output_message;
quality = options->quality;
save_exif = 1- options->strip_exif;
save_iptc = 1- options->strip_iptc;
save_com = 1- options->strip_com ;
save_icc = 1- options->strip_icc ;
save_xmp = 1 - options->strip_xmp;
if (options->strip_all)
{
save_exif = 0;
save_iptc = 0;
save_com = 0;
save_icc = 0;
save_xmp = 0;
}
if (options->strip_none)
{
save_exif = 1;
save_iptc = 1;
save_com = 1;
save_icc = 1;
save_xmp = 1;
}
threshold = options->threshold;
if (threshold < 0) threshold = 0;
if (threshold > 100) threshold = 100;
target_size = options->sizeKB;
if (target_size > 0 && (quality == -1) )
{
quality = 100;
}
if (all_normal && all_progressive)
throw new std::exception("cannot specify both --all-normal and --all-progressive");
retry_point:
try
{
struct marker_context markerContext;
buf = do_decompress(&dinfo, inputbuf, inputlen, &markerContext, quality, retry, &coef_arrays);
insize = inputlen;
outbuffer = binary_search_size(&cinfo, &dinfo, outputlen,insize , target_size, buf, coef_arrays, quality, retry, all_normal, all_progressive,options);
if (quality >= 0 && *outputlen >= insize && !retry) {
retry = 1;
free(outbuffer);
goto retry_point;
}
*outputbuf = outbuffer;
if (buf) FREE_LINE_BUF(buf, dinfo.output_height);
jpeg_finish_decompress(&dinfo);
}
catch (std::exception& ex)
{
OutputDebugStringA(ex.what());
/* error handler for decompress */
jpeg_abort_decompress(&dinfo);
if (buf) FREE_LINE_BUF(buf, dinfo.output_height);
decompress_err_count++;
}
jpeg_destroy_decompress(&dinfo);
jpeg_destroy_compress(&cinfo);
return global_error_counter;
}
#endif // BUILD_STATIC_LIB