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turbojpeg.c
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/*
* Copyright (C)2009-2023 D. R. Commander. All Rights Reserved.
* Copyright (C)2021 Alex Richardson. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the libjpeg-turbo Project nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/* TurboJPEG/LJT: this implements the TurboJPEG API using libjpeg or
libjpeg-turbo */
#include <ctype.h>
#include <limits.h>
#include <jinclude.h>
#define JPEG_INTERNALS
#include <jpeglib.h>
#include <jerror.h>
#include <setjmp.h>
#include <errno.h>
#include "./turbojpeg.h"
#include "./tjutil.h"
#include "transupp.h"
#include "./jpegapicomp.h"
#include "./cdjpeg.h"
extern void jpeg_mem_dest_tj(j_compress_ptr, unsigned char **, size_t *,
boolean);
extern void jpeg_mem_src_tj(j_decompress_ptr, const unsigned char *, size_t);
#define PAD(v, p) ((v + (p) - 1) & (~((p) - 1)))
#define IS_POW2(x) (((x) & (x - 1)) == 0)
/* Error handling (based on example in example.c) */
static THREAD_LOCAL char errStr[JMSG_LENGTH_MAX] = "No error";
struct my_error_mgr {
struct jpeg_error_mgr pub;
jmp_buf setjmp_buffer;
void (*emit_message) (j_common_ptr, int);
boolean warning, stopOnWarning;
};
typedef struct my_error_mgr *my_error_ptr;
#define JMESSAGE(code, string) string,
static const char *turbojpeg_message_table[] = {
#include "cderror.h"
NULL
};
static void my_error_exit(j_common_ptr cinfo)
{
my_error_ptr myerr = (my_error_ptr)cinfo->err;
(*cinfo->err->output_message) (cinfo);
longjmp(myerr->setjmp_buffer, 1);
}
/* Based on output_message() in jerror.c */
static void my_output_message(j_common_ptr cinfo)
{
(*cinfo->err->format_message) (cinfo, errStr);
}
static void my_emit_message(j_common_ptr cinfo, int msg_level)
{
my_error_ptr myerr = (my_error_ptr)cinfo->err;
myerr->emit_message(cinfo, msg_level);
if (msg_level < 0) {
myerr->warning = TRUE;
if (myerr->stopOnWarning) longjmp(myerr->setjmp_buffer, 1);
}
}
/********************** Global structures, macros, etc. **********************/
enum { COMPRESS = 1, DECOMPRESS = 2 };
typedef struct _tjinstance {
struct jpeg_compress_struct cinfo;
struct jpeg_decompress_struct dinfo;
struct my_error_mgr jerr;
int init;
char errStr[JMSG_LENGTH_MAX];
boolean isInstanceError;
/* Parameters */
boolean bottomUp;
boolean noRealloc;
int quality;
int subsamp;
int jpegWidth;
int jpegHeight;
int precision;
int colorspace;
boolean fastUpsample;
boolean fastDCT;
boolean optimize;
boolean progressive;
int scanLimit;
boolean arithmetic;
boolean lossless;
int losslessPSV;
int losslessPt;
int restartIntervalBlocks;
int restartIntervalRows;
int xDensity;
int yDensity;
int densityUnits;
tjscalingfactor scalingFactor;
tjregion croppingRegion;
int maxMemory;
int maxPixels;
} tjinstance;
static tjhandle _tjInitCompress(tjinstance *this);
static tjhandle _tjInitDecompress(tjinstance *this);
struct my_progress_mgr {
struct jpeg_progress_mgr pub;
tjinstance *this;
};
typedef struct my_progress_mgr *my_progress_ptr;
static void my_progress_monitor(j_common_ptr dinfo)
{
my_error_ptr myerr = (my_error_ptr)dinfo->err;
my_progress_ptr myprog = (my_progress_ptr)dinfo->progress;
if (dinfo->is_decompressor) {
int scan_no = ((j_decompress_ptr)dinfo)->input_scan_number;
if (scan_no > myprog->this->scanLimit) {
SNPRINTF(myprog->this->errStr, JMSG_LENGTH_MAX,
"Progressive JPEG image has more than %d scans",
myprog->this->scanLimit);
SNPRINTF(errStr, JMSG_LENGTH_MAX,
"Progressive JPEG image has more than %d scans",
myprog->this->scanLimit);
myprog->this->isInstanceError = TRUE;
myerr->warning = FALSE;
longjmp(myerr->setjmp_buffer, 1);
}
}
}
static const JXFORM_CODE xformtypes[TJ_NUMXOP] = {
JXFORM_NONE, JXFORM_FLIP_H, JXFORM_FLIP_V, JXFORM_TRANSPOSE,
JXFORM_TRANSVERSE, JXFORM_ROT_90, JXFORM_ROT_180, JXFORM_ROT_270
};
#define NUMSF 16
static const tjscalingfactor sf[NUMSF] = {
{ 2, 1 },
{ 15, 8 },
{ 7, 4 },
{ 13, 8 },
{ 3, 2 },
{ 11, 8 },
{ 5, 4 },
{ 9, 8 },
{ 1, 1 },
{ 7, 8 },
{ 3, 4 },
{ 5, 8 },
{ 1, 2 },
{ 3, 8 },
{ 1, 4 },
{ 1, 8 }
};
static J_COLOR_SPACE pf2cs[TJ_NUMPF] = {
JCS_EXT_RGB, JCS_EXT_BGR, JCS_EXT_RGBX, JCS_EXT_BGRX, JCS_EXT_XBGR,
JCS_EXT_XRGB, JCS_GRAYSCALE, JCS_EXT_RGBA, JCS_EXT_BGRA, JCS_EXT_ABGR,
JCS_EXT_ARGB, JCS_CMYK
};
static int cs2pf[JPEG_NUMCS] = {
TJPF_UNKNOWN, TJPF_GRAY,
#if RGB_RED == 0 && RGB_GREEN == 1 && RGB_BLUE == 2 && RGB_PIXELSIZE == 3
TJPF_RGB,
#elif RGB_RED == 2 && RGB_GREEN == 1 && RGB_BLUE == 0 && RGB_PIXELSIZE == 3
TJPF_BGR,
#elif RGB_RED == 0 && RGB_GREEN == 1 && RGB_BLUE == 2 && RGB_PIXELSIZE == 4
TJPF_RGBX,
#elif RGB_RED == 2 && RGB_GREEN == 1 && RGB_BLUE == 0 && RGB_PIXELSIZE == 4
TJPF_BGRX,
#elif RGB_RED == 3 && RGB_GREEN == 2 && RGB_BLUE == 1 && RGB_PIXELSIZE == 4
TJPF_XBGR,
#elif RGB_RED == 1 && RGB_GREEN == 2 && RGB_BLUE == 3 && RGB_PIXELSIZE == 4
TJPF_XRGB,
#endif
TJPF_UNKNOWN, TJPF_CMYK, TJPF_UNKNOWN, TJPF_RGB, TJPF_RGBX, TJPF_BGR,
TJPF_BGRX, TJPF_XBGR, TJPF_XRGB, TJPF_RGBA, TJPF_BGRA, TJPF_ABGR, TJPF_ARGB,
TJPF_UNKNOWN
};
#define THROWG(m, rv) { \
SNPRINTF(errStr, JMSG_LENGTH_MAX, "%s(): %s", FUNCTION_NAME, m); \
retval = rv; goto bailout; \
}
#ifdef _MSC_VER
#define THROW_UNIX(m) { \
char strerrorBuf[80] = { 0 }; \
strerror_s(strerrorBuf, 80, errno); \
SNPRINTF(this->errStr, JMSG_LENGTH_MAX, "%s(): %s\n%s", FUNCTION_NAME, m, \
strerrorBuf); \
this->isInstanceError = TRUE; \
SNPRINTF(errStr, JMSG_LENGTH_MAX, "%s(): %s\n%s", FUNCTION_NAME, m, \
strerrorBuf); \
retval = -1; goto bailout; \
}
#else
#define THROW_UNIX(m) { \
SNPRINTF(this->errStr, JMSG_LENGTH_MAX, "%s(): %s\n%s", FUNCTION_NAME, m, \
strerror(errno)); \
this->isInstanceError = TRUE; \
SNPRINTF(errStr, JMSG_LENGTH_MAX, "%s(): %s\n%s", FUNCTION_NAME, m, \
strerror(errno)); \
retval = -1; goto bailout; \
}
#endif
#define THROW(m) { \
SNPRINTF(this->errStr, JMSG_LENGTH_MAX, "%s(): %s", FUNCTION_NAME, m); \
this->isInstanceError = TRUE; THROWG(m, -1) \
}
#define THROWI(format, val1, val2) { \
SNPRINTF(this->errStr, JMSG_LENGTH_MAX, "%s(): " format, FUNCTION_NAME, \
val1, val2); \
this->isInstanceError = TRUE; \
SNPRINTF(errStr, JMSG_LENGTH_MAX, "%s(): " format, FUNCTION_NAME, val1, \
val2); \
retval = -1; goto bailout; \
}
#define GET_INSTANCE(handle) \
tjinstance *this = (tjinstance *)handle; \
j_compress_ptr cinfo = NULL; \
j_decompress_ptr dinfo = NULL; \
\
if (!this) { \
SNPRINTF(errStr, JMSG_LENGTH_MAX, "%s(): Invalid handle", FUNCTION_NAME); \
return -1; \
} \
cinfo = &this->cinfo; dinfo = &this->dinfo; \
this->jerr.warning = FALSE; \
this->isInstanceError = FALSE;
#define GET_CINSTANCE(handle) \
tjinstance *this = (tjinstance *)handle; \
j_compress_ptr cinfo = NULL; \
\
if (!this) { \
SNPRINTF(errStr, JMSG_LENGTH_MAX, "%s(): Invalid handle", FUNCTION_NAME); \
return -1; \
} \
cinfo = &this->cinfo; \
this->jerr.warning = FALSE; \
this->isInstanceError = FALSE;
#define GET_DINSTANCE(handle) \
tjinstance *this = (tjinstance *)handle; \
j_decompress_ptr dinfo = NULL; \
\
if (!this) { \
SNPRINTF(errStr, JMSG_LENGTH_MAX, "%s(): Invalid handle", FUNCTION_NAME); \
return -1; \
} \
dinfo = &this->dinfo; \
this->jerr.warning = FALSE; \
this->isInstanceError = FALSE;
#define GET_TJINSTANCE(handle, errorReturn) \
tjinstance *this = (tjinstance *)handle; \
\
if (!this) { \
SNPRINTF(errStr, JMSG_LENGTH_MAX, "%s(): Invalid handle", FUNCTION_NAME); \
return errorReturn; \
} \
this->jerr.warning = FALSE; \
this->isInstanceError = FALSE;
static int getPixelFormat(int pixelSize, int flags)
{
if (pixelSize == 1) return TJPF_GRAY;
if (pixelSize == 3) {
if (flags & TJ_BGR) return TJPF_BGR;
else return TJPF_RGB;
}
if (pixelSize == 4) {
if (flags & TJ_ALPHAFIRST) {
if (flags & TJ_BGR) return TJPF_XBGR;
else return TJPF_XRGB;
} else {
if (flags & TJ_BGR) return TJPF_BGRX;
else return TJPF_RGBX;
}
}
return -1;
}
static void setCompDefaults(tjinstance *this, int pixelFormat)
{
this->cinfo.in_color_space = pf2cs[pixelFormat];
this->cinfo.input_components = tjPixelSize[pixelFormat];
jpeg_set_defaults(&this->cinfo);
this->cinfo.restart_interval = this->restartIntervalBlocks;
this->cinfo.restart_in_rows = this->restartIntervalRows;
this->cinfo.X_density = (UINT16)this->xDensity;
this->cinfo.Y_density = (UINT16)this->yDensity;
this->cinfo.density_unit = (UINT8)this->densityUnits;
this->cinfo.mem->max_memory_to_use = (long)this->maxMemory * 1048576L;
if (this->lossless) {
#ifdef C_LOSSLESS_SUPPORTED
jpeg_enable_lossless(&this->cinfo, this->losslessPSV, this->losslessPt);
#endif
if (pixelFormat == TJPF_GRAY)
this->subsamp = TJSAMP_GRAY;
else if (this->subsamp != TJSAMP_GRAY)
this->subsamp = TJSAMP_444;
return;
}
jpeg_set_quality(&this->cinfo, this->quality, TRUE);
this->cinfo.dct_method = this->fastDCT ? JDCT_FASTEST : JDCT_ISLOW;
switch (this->colorspace) {
case TJCS_RGB:
jpeg_set_colorspace(&this->cinfo, JCS_RGB); break;
case TJCS_YCbCr:
jpeg_set_colorspace(&this->cinfo, JCS_YCbCr); break;
case TJCS_GRAY:
jpeg_set_colorspace(&this->cinfo, JCS_GRAYSCALE); break;
case TJCS_CMYK:
jpeg_set_colorspace(&this->cinfo, JCS_CMYK); break;
case TJCS_YCCK:
jpeg_set_colorspace(&this->cinfo, JCS_YCCK); break;
default:
if (this->subsamp == TJSAMP_GRAY)
jpeg_set_colorspace(&this->cinfo, JCS_GRAYSCALE);
else if (pixelFormat == TJPF_CMYK)
jpeg_set_colorspace(&this->cinfo, JCS_YCCK);
else
jpeg_set_colorspace(&this->cinfo, JCS_YCbCr);
}
this->cinfo.optimize_coding = this->optimize;
#ifdef C_PROGRESSIVE_SUPPORTED
if (this->progressive) jpeg_simple_progression(&this->cinfo);
#endif
this->cinfo.arith_code = this->arithmetic;
this->cinfo.comp_info[0].h_samp_factor = tjMCUWidth[this->subsamp] / 8;
this->cinfo.comp_info[1].h_samp_factor = 1;
this->cinfo.comp_info[2].h_samp_factor = 1;
if (this->cinfo.num_components > 3)
this->cinfo.comp_info[3].h_samp_factor = tjMCUWidth[this->subsamp] / 8;
this->cinfo.comp_info[0].v_samp_factor = tjMCUHeight[this->subsamp] / 8;
this->cinfo.comp_info[1].v_samp_factor = 1;
this->cinfo.comp_info[2].v_samp_factor = 1;
if (this->cinfo.num_components > 3)
this->cinfo.comp_info[3].v_samp_factor = tjMCUHeight[this->subsamp] / 8;
}
static int getSubsamp(j_decompress_ptr dinfo)
{
int retval = TJSAMP_UNKNOWN, i, k;
/* The sampling factors actually have no meaning with grayscale JPEG files,
and in fact it's possible to generate grayscale JPEGs with sampling
factors > 1 (even though those sampling factors are ignored by the
decompressor.) Thus, we need to treat grayscale as a special case. */
if (dinfo->num_components == 1 && dinfo->jpeg_color_space == JCS_GRAYSCALE)
return TJSAMP_GRAY;
for (i = 0; i < TJ_NUMSAMP; i++) {
if (i == TJSAMP_GRAY) continue;
if (dinfo->num_components == 3 ||
((dinfo->jpeg_color_space == JCS_YCCK ||
dinfo->jpeg_color_space == JCS_CMYK) &&
dinfo->num_components == 4)) {
if (dinfo->comp_info[0].h_samp_factor == tjMCUWidth[i] / 8 &&
dinfo->comp_info[0].v_samp_factor == tjMCUHeight[i] / 8) {
int match = 0;
for (k = 1; k < dinfo->num_components; k++) {
int href = 1, vref = 1;
if ((dinfo->jpeg_color_space == JCS_YCCK ||
dinfo->jpeg_color_space == JCS_CMYK) && k == 3) {
href = tjMCUWidth[i] / 8; vref = tjMCUHeight[i] / 8;
}
if (dinfo->comp_info[k].h_samp_factor == href &&
dinfo->comp_info[k].v_samp_factor == vref)
match++;
}
if (match == dinfo->num_components - 1) {
retval = i; break;
}
}
/* Handle 4:2:2 and 4:4:0 images whose sampling factors are specified
in non-standard ways. */
if (dinfo->comp_info[0].h_samp_factor == 2 &&
dinfo->comp_info[0].v_samp_factor == 2 &&
(i == TJSAMP_422 || i == TJSAMP_440)) {
int match = 0;
for (k = 1; k < dinfo->num_components; k++) {
int href = tjMCUHeight[i] / 8, vref = tjMCUWidth[i] / 8;
if ((dinfo->jpeg_color_space == JCS_YCCK ||
dinfo->jpeg_color_space == JCS_CMYK) && k == 3) {
href = vref = 2;
}
if (dinfo->comp_info[k].h_samp_factor == href &&
dinfo->comp_info[k].v_samp_factor == vref)
match++;
}
if (match == dinfo->num_components - 1) {
retval = i; break;
}
}
/* Handle 4:4:4 images whose sampling factors are specified in
non-standard ways. */
if (dinfo->comp_info[0].h_samp_factor *
dinfo->comp_info[0].v_samp_factor <=
D_MAX_BLOCKS_IN_MCU / 3 && i == TJSAMP_444) {
int match = 0;
for (k = 1; k < dinfo->num_components; k++) {
if (dinfo->comp_info[k].h_samp_factor ==
dinfo->comp_info[0].h_samp_factor &&
dinfo->comp_info[k].v_samp_factor ==
dinfo->comp_info[0].v_samp_factor)
match++;
if (match == dinfo->num_components - 1) {
retval = i; break;
}
}
}
}
}
return retval;
}
static void setDecompParameters(tjinstance *this)
{
this->subsamp = getSubsamp(&this->dinfo);
this->jpegWidth = this->dinfo.image_width;
this->jpegHeight = this->dinfo.image_height;
this->precision = this->dinfo.data_precision;
switch (this->dinfo.jpeg_color_space) {
case JCS_GRAYSCALE: this->colorspace = TJCS_GRAY; break;
case JCS_RGB: this->colorspace = TJCS_RGB; break;
case JCS_YCbCr: this->colorspace = TJCS_YCbCr; break;
case JCS_CMYK: this->colorspace = TJCS_CMYK; break;
case JCS_YCCK: this->colorspace = TJCS_YCCK; break;
default: this->colorspace = -1; break;
}
this->progressive = this->dinfo.progressive_mode;
this->arithmetic = this->dinfo.arith_code;
this->lossless = this->dinfo.master->lossless;
this->losslessPSV = this->dinfo.Ss;
this->losslessPt = this->dinfo.Al;
this->xDensity = this->dinfo.X_density;
this->yDensity = this->dinfo.Y_density;
this->densityUnits = this->dinfo.density_unit;
}
static void processFlags(tjhandle handle, int flags, int operation)
{
tjinstance *this = (tjinstance *)handle;
this->bottomUp = !!(flags & TJFLAG_BOTTOMUP);
#ifndef NO_PUTENV
if (flags & TJFLAG_FORCEMMX) PUTENV_S("JSIMD_FORCEMMX", "1");
else if (flags & TJFLAG_FORCESSE) PUTENV_S("JSIMD_FORCESSE", "1");
else if (flags & TJFLAG_FORCESSE2) PUTENV_S("JSIMD_FORCESSE2", "1");
#endif
this->fastUpsample = !!(flags & TJFLAG_FASTUPSAMPLE);
this->noRealloc = !!(flags & TJFLAG_NOREALLOC);
if (operation == COMPRESS) {
if (this->quality >= 96 || flags & TJFLAG_ACCURATEDCT)
this->fastDCT = FALSE;
else
this->fastDCT = TRUE;
} else
this->fastDCT = !!(flags & TJFLAG_FASTDCT);
this->jerr.stopOnWarning = !!(flags & TJFLAG_STOPONWARNING);
this->progressive = !!(flags & TJFLAG_PROGRESSIVE);
if (flags & TJFLAG_LIMITSCANS) this->scanLimit = 500;
}
/*************************** General API functions ***************************/
/* TurboJPEG 3+ */
DLLEXPORT tjhandle tj3Init(int initType)
{
static const char FUNCTION_NAME[] = "tj3Init";
tjinstance *this = NULL;
tjhandle retval = NULL;
if (initType < 0 || initType >= TJ_NUMINIT)
THROWG("Invalid argument", NULL);
if ((this = (tjinstance *)malloc(sizeof(tjinstance))) == NULL)
THROWG("Memory allocation failure", NULL);
memset(this, 0, sizeof(tjinstance));
SNPRINTF(this->errStr, JMSG_LENGTH_MAX, "No error");
this->quality = -1;
this->subsamp = TJSAMP_UNKNOWN;
this->jpegWidth = -1;
this->jpegHeight = -1;
this->precision = 8;
this->colorspace = -1;
this->losslessPSV = 1;
this->xDensity = 1;
this->yDensity = 1;
this->scalingFactor = TJUNSCALED;
switch (initType) {
case TJINIT_COMPRESS: return _tjInitCompress(this);
case TJINIT_DECOMPRESS: return _tjInitDecompress(this);
case TJINIT_TRANSFORM:
retval = _tjInitCompress(this);
if (!retval) return NULL;
retval = _tjInitDecompress(this);
return retval;
}
bailout:
return retval;
}
#define SET_PARAM(field, minValue, maxValue) { \
if (value < minValue || (maxValue > 0 && value > maxValue)) \
THROW("Parameter value out of range"); \
this->field = value; \
}
#define SET_BOOL_PARAM(field) { \
if (value < 0 || value > 1) \
THROW("Parameter value out of range"); \
this->field = (boolean)value; \
}
/* TurboJPEG 3+ */
DLLEXPORT int tj3Set(tjhandle handle, int param, int value)
{
static const char FUNCTION_NAME[] = "tj3Set";
int retval = 0;
GET_TJINSTANCE(handle, -1);
switch (param) {
case TJPARAM_STOPONWARNING:
SET_BOOL_PARAM(jerr.stopOnWarning);
break;
case TJPARAM_BOTTOMUP:
SET_BOOL_PARAM(bottomUp);
break;
case TJPARAM_NOREALLOC:
if (!(this->init & COMPRESS))
THROW("TJPARAM_NOREALLOC is not applicable to decompression instances.");
SET_BOOL_PARAM(noRealloc);
break;
case TJPARAM_QUALITY:
if (!(this->init & COMPRESS))
THROW("TJPARAM_QUALITY is not applicable to decompression instances.");
SET_PARAM(quality, 1, 100);
break;
case TJPARAM_SUBSAMP:
SET_PARAM(subsamp, 0, TJ_NUMSAMP - 1);
break;
case TJPARAM_JPEGWIDTH:
if (!(this->init & DECOMPRESS))
THROW("TJPARAM_JPEGWIDTH is not applicable to compression instances.");
THROW("TJPARAM_JPEGWIDTH is read-only in decompression instances.");
break;
case TJPARAM_JPEGHEIGHT:
if (!(this->init & DECOMPRESS))
THROW("TJPARAM_JPEGHEIGHT is not applicable to compression instances.");
THROW("TJPARAM_JPEGHEIGHT is read-only in decompression instances.");
break;
case TJPARAM_PRECISION:
if (!(this->init & DECOMPRESS))
THROW("TJPARAM_PRECISION is not applicable to compression instances.");
THROW("TJPARAM_PRECISION is read-only in decompression instances.");
break;
case TJPARAM_COLORSPACE:
if (!(this->init & COMPRESS))
THROW("TJPARAM_COLORSPACE is read-only in decompression instances.");
SET_PARAM(colorspace, 0, TJ_NUMCS - 1);
break;
case TJPARAM_FASTUPSAMPLE:
if (!(this->init & DECOMPRESS))
THROW("TJPARAM_FASTUPSAMPLE is not applicable to compression instances.");
SET_BOOL_PARAM(fastUpsample);
break;
case TJPARAM_FASTDCT:
SET_BOOL_PARAM(fastDCT);
break;
case TJPARAM_OPTIMIZE:
if (!(this->init & COMPRESS))
THROW("TJPARAM_OPTIMIZE is not applicable to decompression instances.");
SET_BOOL_PARAM(optimize);
break;
case TJPARAM_PROGRESSIVE:
if (!(this->init & COMPRESS))
THROW("TJPARAM_PROGRESSIVE is read-only in decompression instances.");
SET_BOOL_PARAM(progressive);
break;
case TJPARAM_SCANLIMIT:
if (!(this->init & DECOMPRESS))
THROW("TJPARAM_SCANLIMIT is not applicable to compression instances.");
SET_PARAM(scanLimit, 0, -1);
break;
case TJPARAM_ARITHMETIC:
if (!(this->init & COMPRESS))
THROW("TJPARAM_ARITHMETIC is read-only in decompression instances.");
SET_BOOL_PARAM(arithmetic);
break;
case TJPARAM_LOSSLESS:
if (!(this->init & COMPRESS))
THROW("TJPARAM_LOSSLESS is read-only in decompression instances.");
SET_BOOL_PARAM(lossless);
break;
case TJPARAM_LOSSLESSPSV:
if (!(this->init & COMPRESS))
THROW("TJPARAM_LOSSLESSPSV is read-only in decompression instances.");
SET_PARAM(losslessPSV, 1, 7);
break;
case TJPARAM_LOSSLESSPT:
if (!(this->init & COMPRESS))
THROW("TJPARAM_LOSSLESSPT is read-only in decompression instances.");
SET_PARAM(losslessPt, 0, this->precision - 1);
break;
case TJPARAM_RESTARTBLOCKS:
if (!(this->init & COMPRESS))
THROW("TJPARAM_RESTARTBLOCKS is not applicable to decompression instances.");
SET_PARAM(restartIntervalBlocks, 0, 65535);
if (value != 0) this->restartIntervalRows = 0;
break;
case TJPARAM_RESTARTROWS:
if (!(this->init & COMPRESS))
THROW("TJPARAM_RESTARTROWS is not applicable to decompression instances.");
SET_PARAM(restartIntervalRows, 0, 65535);
if (value != 0) this->restartIntervalBlocks = 0;
break;
case TJPARAM_XDENSITY:
if (!(this->init & COMPRESS))
THROW("TJPARAM_XDENSITY is read-only in decompression instances.");
SET_PARAM(xDensity, 1, 65535);
break;
case TJPARAM_YDENSITY:
if (!(this->init & COMPRESS))
THROW("TJPARAM_YDENSITY is read-only in decompression instances.");
SET_PARAM(yDensity, 1, 65535);
break;
case TJPARAM_DENSITYUNITS:
if (!(this->init & COMPRESS))
THROW("TJPARAM_DENSITYUNITS is read-only in decompression instances.");
SET_PARAM(densityUnits, 0, 2);
break;
case TJPARAM_MAXMEMORY:
SET_PARAM(maxMemory, 0, (int)(min(LONG_MAX / 1048576L, (long)INT_MAX)));
break;
case TJPARAM_MAXPIXELS:
SET_PARAM(maxPixels, 0, -1);
break;
default:
THROW("Invalid parameter");
}
bailout:
return retval;
}
/* TurboJPEG 3+ */
DLLEXPORT int tj3Get(tjhandle handle, int param)
{
tjinstance *this = (tjinstance *)handle;
if (!this) return -1;
switch (param) {
case TJPARAM_STOPONWARNING:
return this->jerr.stopOnWarning;
case TJPARAM_BOTTOMUP:
return this->bottomUp;
case TJPARAM_NOREALLOC:
return this->noRealloc;
case TJPARAM_QUALITY:
return this->quality;
case TJPARAM_SUBSAMP:
return this->subsamp;
case TJPARAM_JPEGWIDTH:
return this->jpegWidth;
case TJPARAM_JPEGHEIGHT:
return this->jpegHeight;
case TJPARAM_PRECISION:
return this->precision;
case TJPARAM_COLORSPACE:
return this->colorspace;
case TJPARAM_FASTUPSAMPLE:
return this->fastUpsample;
case TJPARAM_FASTDCT:
return this->fastDCT;
case TJPARAM_OPTIMIZE:
return this->optimize;
case TJPARAM_PROGRESSIVE:
return this->progressive;
case TJPARAM_SCANLIMIT:
return this->scanLimit;
case TJPARAM_ARITHMETIC:
return this->arithmetic;
case TJPARAM_LOSSLESS:
return this->lossless;
case TJPARAM_LOSSLESSPSV:
return this->losslessPSV;
case TJPARAM_LOSSLESSPT:
return this->losslessPt;
case TJPARAM_RESTARTBLOCKS:
return this->restartIntervalBlocks;
case TJPARAM_RESTARTROWS:
return this->restartIntervalRows;
case TJPARAM_XDENSITY:
return this->xDensity;
case TJPARAM_YDENSITY:
return this->yDensity;
case TJPARAM_DENSITYUNITS:
return this->densityUnits;
case TJPARAM_MAXMEMORY:
return this->maxMemory;
case TJPARAM_MAXPIXELS:
return this->maxPixels;
}
return -1;
}
/* TurboJPEG 3+ */
DLLEXPORT char *tj3GetErrorStr(tjhandle handle)
{
tjinstance *this = (tjinstance *)handle;
if (this && this->isInstanceError) {
this->isInstanceError = FALSE;
return this->errStr;
} else
return errStr;
}
/* TurboJPEG 2.0+ */
DLLEXPORT char *tjGetErrorStr2(tjhandle handle)
{
return tj3GetErrorStr(handle);
}
/* TurboJPEG 1.0+ */
DLLEXPORT char *tjGetErrorStr(void)
{
return errStr;
}
/* TurboJPEG 3+ */
DLLEXPORT int tj3GetErrorCode(tjhandle handle)
{
tjinstance *this = (tjinstance *)handle;
if (this && this->jerr.warning) return TJERR_WARNING;
else return TJERR_FATAL;
}
/* TurboJPEG 2.0+ */
DLLEXPORT int tjGetErrorCode(tjhandle handle)
{
return tj3GetErrorCode(handle);
}
/* TurboJPEG 3+ */
DLLEXPORT void tj3Destroy(tjhandle handle)
{
tjinstance *this = (tjinstance *)handle;
j_compress_ptr cinfo = NULL;
j_decompress_ptr dinfo = NULL;
if (!this) return;
cinfo = &this->cinfo; dinfo = &this->dinfo;
this->jerr.warning = FALSE;
this->isInstanceError = FALSE;
if (setjmp(this->jerr.setjmp_buffer)) return;
if (this->init & COMPRESS) jpeg_destroy_compress(cinfo);
if (this->init & DECOMPRESS) jpeg_destroy_decompress(dinfo);
free(this);
}
/* TurboJPEG 1.0+ */
DLLEXPORT int tjDestroy(tjhandle handle)
{
static const char FUNCTION_NAME[] = "tjDestroy";
int retval = 0;
if (!handle) THROWG("Invalid handle", -1);
SNPRINTF(errStr, JMSG_LENGTH_MAX, "No error");
tj3Destroy(handle);
if (strcmp(errStr, "No error")) retval = -1;
bailout:
return retval;
}
/* These are exposed mainly because Windows can't malloc() and free() across
DLL boundaries except when the CRT DLL is used, and we don't use the CRT DLL
with turbojpeg.dll for compatibility reasons. However, these functions
can potentially be used for other purposes by different implementations. */
/* TurboJPEG 3+ */
DLLEXPORT void tj3Free(void *buf)
{
free(buf);
}
/* TurboJPEG 1.2+ */
DLLEXPORT void tjFree(unsigned char *buf)
{
tj3Free(buf);
}
/* TurboJPEG 3+ */
DLLEXPORT void *tj3Alloc(size_t bytes)
{
return malloc(bytes);
}
/* TurboJPEG 1.2+ */
DLLEXPORT unsigned char *tjAlloc(int bytes)
{
return (unsigned char *)tj3Alloc((size_t)bytes);
}
/******************************** Compressor *********************************/
static tjhandle _tjInitCompress(tjinstance *this)
{
static unsigned char buffer[1];
unsigned char *buf = buffer;
size_t size = 1;
/* This is also straight out of example.c */
this->cinfo.err = jpeg_std_error(&this->jerr.pub);
this->jerr.pub.error_exit = my_error_exit;
this->jerr.pub.output_message = my_output_message;
this->jerr.emit_message = this->jerr.pub.emit_message;
this->jerr.pub.emit_message = my_emit_message;
this->jerr.pub.addon_message_table = turbojpeg_message_table;
this->jerr.pub.first_addon_message = JMSG_FIRSTADDONCODE;
this->jerr.pub.last_addon_message = JMSG_LASTADDONCODE;
if (setjmp(this->jerr.setjmp_buffer)) {
/* If we get here, the JPEG code has signaled an error. */
free(this);
return NULL;
}
jpeg_create_compress(&this->cinfo);
/* Make an initial call so it will create the destination manager */
jpeg_mem_dest_tj(&this->cinfo, &buf, &size, 0);
this->init |= COMPRESS;
return (tjhandle)this;
}
/* TurboJPEG 1.0+ */
DLLEXPORT tjhandle tjInitCompress(void)
{
return tj3Init(TJINIT_COMPRESS);
}
/* TurboJPEG 3+ */
DLLEXPORT size_t tj3JPEGBufSize(int width, int height, int jpegSubsamp)
{
static const char FUNCTION_NAME[] = "tj3JPEGBufSize";
unsigned long long retval = 0;
int mcuw, mcuh, chromasf;
if (width < 1 || height < 1 || jpegSubsamp < TJSAMP_UNKNOWN ||
jpegSubsamp >= TJ_NUMSAMP)
THROWG("Invalid argument", 0);
if (jpegSubsamp == TJSAMP_UNKNOWN)
jpegSubsamp = TJSAMP_444;
/* This allows for rare corner cases in which a JPEG image can actually be
larger than the uncompressed input (we wouldn't mention it if it hadn't
happened before.) */
mcuw = tjMCUWidth[jpegSubsamp];
mcuh = tjMCUHeight[jpegSubsamp];
chromasf = jpegSubsamp == TJSAMP_GRAY ? 0 : 4 * 64 / (mcuw * mcuh);
retval = PAD(width, mcuw) * PAD(height, mcuh) * (2ULL + chromasf) + 2048ULL;
if (retval > (unsigned long long)((unsigned long)-1))
THROWG("Image is too large", 0);
bailout:
return (size_t)retval;
}
/* TurboJPEG 1.2+ */
DLLEXPORT unsigned long tjBufSize(int width, int height, int jpegSubsamp)
{
static const char FUNCTION_NAME[] = "tjBufSize";
size_t retval;
if (jpegSubsamp < 0)
THROWG("Invalid argument", 0);
retval = tj3JPEGBufSize(width, height, jpegSubsamp);
bailout:
return (retval == 0) ? (unsigned long)-1 : (unsigned long)retval;
}
/* TurboJPEG 1.0+ */
DLLEXPORT unsigned long TJBUFSIZE(int width, int height)
{
static const char FUNCTION_NAME[] = "TJBUFSIZE";
unsigned long long retval = 0;
if (width < 1 || height < 1)
THROWG("Invalid argument", (unsigned long)-1);
/* This allows for rare corner cases in which a JPEG image can actually be
larger than the uncompressed input (we wouldn't mention it if it hadn't
happened before.) */
retval = PAD(width, 16) * PAD(height, 16) * 6ULL + 2048ULL;
if (retval > (unsigned long long)((unsigned long)-1))
THROWG("Image is too large", (unsigned long)-1);
bailout:
return (unsigned long)retval;
}
/* TurboJPEG 3+ */
DLLEXPORT size_t tj3YUVBufSize(int width, int align, int height, int subsamp)
{
static const char FUNCTION_NAME[] = "tj3YUVBufSize";
unsigned long long retval = 0;
int nc, i;
if (align < 1 || !IS_POW2(align) || subsamp < 0 || subsamp >= TJ_NUMSAMP)
THROWG("Invalid argument", 0);