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turbojpeg.c
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/*
* Copyright (C)2009-2017 D. R. Commander. 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 <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <jinclude.h>
#define JPEG_INTERNALS
#include <jpeglib.h>
#include <jerror.h>
#include <setjmp.h>
#include "./turbojpeg.h"
#include "./tjutil.h"
#include "transupp.h"
#include "./jpegcomp.h"
extern void jpeg_mem_dest_tj(j_compress_ptr, unsigned char **,
unsigned long *, boolean);
extern void jpeg_mem_src_tj(j_decompress_ptr, const unsigned char *,
unsigned long);
#define PAD(v, p) ((v+(p)-1)&(~((p)-1)))
#define isPow2(x) (((x)&(x-1))==0)
/* Error handling (based on example in example.c) */
static 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;
};
typedef struct my_error_mgr *my_error_ptr;
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;
}
/* 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, headerRead;
} tjinstance;
static const int pixelsize[TJ_NUMSAMP]={3, 3, 3, 1, 3, 3};
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}
};
#define _throw(m) {snprintf(errStr, JMSG_LENGTH_MAX, "%s", m); \
retval=-1; goto bailout;}
#define getinstance(handle) tjinstance *this=(tjinstance *)handle; \
j_compress_ptr cinfo=NULL; j_decompress_ptr dinfo=NULL; \
if(!this) {snprintf(errStr, JMSG_LENGTH_MAX, "Invalid handle"); \
return -1;} \
cinfo=&this->cinfo; dinfo=&this->dinfo; \
this->jerr.warning=FALSE;
#define getcinstance(handle) tjinstance *this=(tjinstance *)handle; \
j_compress_ptr cinfo=NULL; \
if(!this) {snprintf(errStr, JMSG_LENGTH_MAX, "Invalid handle"); \
return -1;} \
cinfo=&this->cinfo; \
this->jerr.warning=FALSE;
#define getdinstance(handle) tjinstance *this=(tjinstance *)handle; \
j_decompress_ptr dinfo=NULL; \
if(!this) {snprintf(errStr, JMSG_LENGTH_MAX, "Invalid handle"); \
return -1;} \
dinfo=&this->dinfo; \
this->jerr.warning=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 int setCompDefaults(struct jpeg_compress_struct *cinfo,
int pixelFormat, int subsamp, int jpegQual, int flags)
{
int retval=0;
char *env=NULL;
switch(pixelFormat)
{
case TJPF_GRAY:
cinfo->in_color_space=JCS_GRAYSCALE; break;
#if JCS_EXTENSIONS==1
case TJPF_RGB:
cinfo->in_color_space=JCS_EXT_RGB; break;
case TJPF_BGR:
cinfo->in_color_space=JCS_EXT_BGR; break;
case TJPF_RGBX:
case TJPF_RGBA:
cinfo->in_color_space=JCS_EXT_RGBX; break;
case TJPF_BGRX:
case TJPF_BGRA:
cinfo->in_color_space=JCS_EXT_BGRX; break;
case TJPF_XRGB:
case TJPF_ARGB:
cinfo->in_color_space=JCS_EXT_XRGB; break;
case TJPF_XBGR:
case TJPF_ABGR:
cinfo->in_color_space=JCS_EXT_XBGR; break;
#else
case TJPF_RGB:
case TJPF_BGR:
case TJPF_RGBX:
case TJPF_BGRX:
case TJPF_XRGB:
case TJPF_XBGR:
case TJPF_RGBA:
case TJPF_BGRA:
case TJPF_ARGB:
case TJPF_ABGR:
cinfo->in_color_space=JCS_RGB; pixelFormat=TJPF_RGB;
break;
#endif
case TJPF_CMYK:
cinfo->in_color_space=JCS_CMYK; break;
}
cinfo->input_components=tjPixelSize[pixelFormat];
jpeg_set_defaults(cinfo);
#ifndef NO_GETENV
if((env=getenv("TJ_OPTIMIZE"))!=NULL && strlen(env)>0 && !strcmp(env, "1"))
cinfo->optimize_coding=TRUE;
if((env=getenv("TJ_ARITHMETIC"))!=NULL && strlen(env)>0 && !strcmp(env, "1"))
cinfo->arith_code=TRUE;
if((env=getenv("TJ_RESTART"))!=NULL && strlen(env)>0)
{
int temp=-1; char tempc=0;
if(sscanf(env, "%d%c", &temp, &tempc)>=1 && temp>=0 && temp<=65535)
{
if(toupper(tempc)=='B')
{
cinfo->restart_interval=temp;
cinfo->restart_in_rows=0;
}
else
cinfo->restart_in_rows=temp;
}
}
#endif
if(jpegQual>=0)
{
jpeg_set_quality(cinfo, jpegQual, TRUE);
if(jpegQual>=96 || flags&TJFLAG_ACCURATEDCT) cinfo->dct_method=JDCT_ISLOW;
else cinfo->dct_method=JDCT_FASTEST;
}
if(subsamp==TJSAMP_GRAY)
jpeg_set_colorspace(cinfo, JCS_GRAYSCALE);
else if(pixelFormat==TJPF_CMYK)
jpeg_set_colorspace(cinfo, JCS_YCCK);
else jpeg_set_colorspace(cinfo, JCS_YCbCr);
#ifndef NO_GETENV
if((env=getenv("TJ_PROGRESSIVE"))!=NULL && strlen(env)>0
&& !strcmp(env, "1"))
jpeg_simple_progression(cinfo);
#endif
cinfo->comp_info[0].h_samp_factor=tjMCUWidth[subsamp]/8;
cinfo->comp_info[1].h_samp_factor=1;
cinfo->comp_info[2].h_samp_factor=1;
if(cinfo->num_components>3)
cinfo->comp_info[3].h_samp_factor=tjMCUWidth[subsamp]/8;
cinfo->comp_info[0].v_samp_factor=tjMCUHeight[subsamp]/8;
cinfo->comp_info[1].v_samp_factor=1;
cinfo->comp_info[2].v_samp_factor=1;
if(cinfo->num_components>3)
cinfo->comp_info[3].v_samp_factor=tjMCUHeight[subsamp]/8;
return retval;
}
static int setDecompDefaults(struct jpeg_decompress_struct *dinfo,
int pixelFormat, int flags)
{
int retval=0;
switch(pixelFormat)
{
case TJPF_GRAY:
dinfo->out_color_space=JCS_GRAYSCALE; break;
#if JCS_EXTENSIONS==1
case TJPF_RGB:
dinfo->out_color_space=JCS_EXT_RGB; break;
case TJPF_BGR:
dinfo->out_color_space=JCS_EXT_BGR; break;
case TJPF_RGBX:
dinfo->out_color_space=JCS_EXT_RGBX; break;
case TJPF_BGRX:
dinfo->out_color_space=JCS_EXT_BGRX; break;
case TJPF_XRGB:
dinfo->out_color_space=JCS_EXT_XRGB; break;
case TJPF_XBGR:
dinfo->out_color_space=JCS_EXT_XBGR; break;
#if JCS_ALPHA_EXTENSIONS==1
case TJPF_RGBA:
dinfo->out_color_space=JCS_EXT_RGBA; break;
case TJPF_BGRA:
dinfo->out_color_space=JCS_EXT_BGRA; break;
case TJPF_ARGB:
dinfo->out_color_space=JCS_EXT_ARGB; break;
case TJPF_ABGR:
dinfo->out_color_space=JCS_EXT_ABGR; break;
#endif
#else
case TJPF_RGB:
case TJPF_BGR:
case TJPF_RGBX:
case TJPF_BGRX:
case TJPF_XRGB:
case TJPF_XBGR:
case TJPF_RGBA:
case TJPF_BGRA:
case TJPF_ARGB:
case TJPF_ABGR:
dinfo->out_color_space=JCS_RGB; break;
#endif
case TJPF_CMYK:
dinfo->out_color_space=JCS_CMYK; break;
default:
_throw("Unsupported pixel format");
}
if(flags&TJFLAG_FASTDCT) dinfo->dct_method=JDCT_FASTEST;
bailout:
return retval;
}
static int getSubsamp(j_decompress_ptr dinfo)
{
int retval=-1, 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<NUMSUBOPT; i++)
{
if(dinfo->num_components==pixelsize[i]
|| ((dinfo->jpeg_color_space==JCS_YCCK
|| dinfo->jpeg_color_space==JCS_CMYK)
&& pixelsize[i]==3 && 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 && 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 && 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;
}
}
}
}
return retval;
}
#ifndef JCS_EXTENSIONS
/* Conversion functions to emulate the colorspace extensions. This allows the
TurboJPEG wrapper to be used with libjpeg */
#define TORGB(PS, ROFFSET, GOFFSET, BOFFSET) { \
int rowPad=pitch-width*PS; \
while(height--) \
{ \
unsigned char *endOfRow=src+width*PS; \
while(src<endOfRow) \
{ \
dst[RGB_RED]=src[ROFFSET]; \
dst[RGB_GREEN]=src[GOFFSET]; \
dst[RGB_BLUE]=src[BOFFSET]; \
dst+=RGB_PIXELSIZE; src+=PS; \
} \
src+=rowPad; \
} \
}
static unsigned char *toRGB(unsigned char *src, int width, int pitch,
int height, int pixelFormat, unsigned char *dst)
{
unsigned char *retval=src;
switch(pixelFormat)
{
case TJPF_RGB:
#if RGB_RED!=0 || RGB_GREEN!=1 || RGB_BLUE!=2 || RGB_PIXELSIZE!=3
retval=dst; TORGB(3, 0, 1, 2);
#endif
break;
case TJPF_BGR:
#if RGB_RED!=2 || RGB_GREEN!=1 || RGB_BLUE!=0 || RGB_PIXELSIZE!=3
retval=dst; TORGB(3, 2, 1, 0);
#endif
break;
case TJPF_RGBX:
case TJPF_RGBA:
#if RGB_RED!=0 || RGB_GREEN!=1 || RGB_BLUE!=2 || RGB_PIXELSIZE!=4
retval=dst; TORGB(4, 0, 1, 2);
#endif
break;
case TJPF_BGRX:
case TJPF_BGRA:
#if RGB_RED!=2 || RGB_GREEN!=1 || RGB_BLUE!=0 || RGB_PIXELSIZE!=4
retval=dst; TORGB(4, 2, 1, 0);
#endif
break;
case TJPF_XRGB:
case TJPF_ARGB:
#if RGB_RED!=1 || RGB_GREEN!=2 || RGB_BLUE!=3 || RGB_PIXELSIZE!=4
retval=dst; TORGB(4, 1, 2, 3);
#endif
break;
case TJPF_XBGR:
case TJPF_ABGR:
#if RGB_RED!=3 || RGB_GREEN!=2 || RGB_BLUE!=1 || RGB_PIXELSIZE!=4
retval=dst; TORGB(4, 3, 2, 1);
#endif
break;
}
return retval;
}
#define FROMRGB(PS, ROFFSET, GOFFSET, BOFFSET, SETALPHA) { \
int rowPad=pitch-width*PS; \
while(height--) \
{ \
unsigned char *endOfRow=dst+width*PS; \
while(dst<endOfRow) \
{ \
dst[ROFFSET]=src[RGB_RED]; \
dst[GOFFSET]=src[RGB_GREEN]; \
dst[BOFFSET]=src[RGB_BLUE]; \
SETALPHA \
dst+=PS; src+=RGB_PIXELSIZE; \
} \
dst+=rowPad; \
} \
}
static void fromRGB(unsigned char *src, unsigned char *dst, int width,
int pitch, int height, int pixelFormat)
{
switch(pixelFormat)
{
case TJPF_RGB:
#if RGB_RED!=0 || RGB_GREEN!=1 || RGB_BLUE!=2 || RGB_PIXELSIZE!=3
FROMRGB(3, 0, 1, 2,);
#endif
break;
case TJPF_BGR:
#if RGB_RED!=2 || RGB_GREEN!=1 || RGB_BLUE!=0 || RGB_PIXELSIZE!=3
FROMRGB(3, 2, 1, 0,);
#endif
break;
case TJPF_RGBX:
#if RGB_RED!=0 || RGB_GREEN!=1 || RGB_BLUE!=2 || RGB_PIXELSIZE!=4
FROMRGB(4, 0, 1, 2,);
#endif
break;
case TJPF_RGBA:
#if RGB_RED!=0 || RGB_GREEN!=1 || RGB_BLUE!=2 || RGB_PIXELSIZE!=4
FROMRGB(4, 0, 1, 2, dst[3]=0xFF;);
#endif
break;
case TJPF_BGRX:
#if RGB_RED!=2 || RGB_GREEN!=1 || RGB_BLUE!=0 || RGB_PIXELSIZE!=4
FROMRGB(4, 2, 1, 0,);
#endif
break;
case TJPF_BGRA:
#if RGB_RED!=2 || RGB_GREEN!=1 || RGB_BLUE!=0 || RGB_PIXELSIZE!=4
FROMRGB(4, 2, 1, 0, dst[3]=0xFF;); return;
#endif
break;
case TJPF_XRGB:
#if RGB_RED!=1 || RGB_GREEN!=2 || RGB_BLUE!=3 || RGB_PIXELSIZE!=4
FROMRGB(4, 1, 2, 3,); return;
#endif
break;
case TJPF_ARGB:
#if RGB_RED!=1 || RGB_GREEN!=2 || RGB_BLUE!=3 || RGB_PIXELSIZE!=4
FROMRGB(4, 1, 2, 3, dst[0]=0xFF;); return;
#endif
break;
case TJPF_XBGR:
#if RGB_RED!=3 || RGB_GREEN!=2 || RGB_BLUE!=1 || RGB_PIXELSIZE!=4
FROMRGB(4, 3, 2, 1,); return;
#endif
break;
case TJPF_ABGR:
#if RGB_RED!=3 || RGB_GREEN!=2 || RGB_BLUE!=1 || RGB_PIXELSIZE!=4
FROMRGB(4, 3, 2, 1, dst[0]=0xFF;); return;
#endif
break;
}
}
#endif
/* General API functions */
DLLEXPORT char* DLLCALL tjGetErrorStr(void)
{
return errStr;
}
DLLEXPORT int DLLCALL tjDestroy(tjhandle handle)
{
getinstance(handle);
if(setjmp(this->jerr.setjmp_buffer)) return -1;
if(this->init&COMPRESS) jpeg_destroy_compress(cinfo);
if(this->init&DECOMPRESS) jpeg_destroy_decompress(dinfo);
free(this);
return 0;
}
/* 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. */
DLLEXPORT void DLLCALL tjFree(unsigned char *buf)
{
if(buf) free(buf);
}
DLLEXPORT unsigned char *DLLCALL tjAlloc(int bytes)
{
return (unsigned char *)malloc(bytes);
}
/* Compressor */
static tjhandle _tjInitCompress(tjinstance *this)
{
static unsigned char buffer[1];
unsigned char *buf=buffer; unsigned long 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;
if(setjmp(this->jerr.setjmp_buffer))
{
/* If we get here, the JPEG code has signaled an error. */
if(this) 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;
}
DLLEXPORT tjhandle DLLCALL tjInitCompress(void)
{
tjinstance *this=NULL;
if((this=(tjinstance *)malloc(sizeof(tjinstance)))==NULL)
{
snprintf(errStr, JMSG_LENGTH_MAX,
"tjInitCompress(): Memory allocation failure");
return NULL;
}
MEMZERO(this, sizeof(tjinstance));
return _tjInitCompress(this);
}
DLLEXPORT unsigned long DLLCALL tjBufSize(int width, int height,
int jpegSubsamp)
{
unsigned long retval=0; int mcuw, mcuh, chromasf;
if(width<1 || height<1 || jpegSubsamp<0 || jpegSubsamp>=NUMSUBOPT)
_throw("tjBufSize(): Invalid argument");
/* 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) * (2 + chromasf) + 2048;
bailout:
return retval;
}
DLLEXPORT unsigned long DLLCALL TJBUFSIZE(int width, int height)
{
unsigned long retval=0;
if(width<1 || height<1)
_throw("TJBUFSIZE(): Invalid argument");
/* 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) * 6 + 2048;
bailout:
return retval;
}
DLLEXPORT unsigned long DLLCALL tjBufSizeYUV2(int width, int pad, int height,
int subsamp)
{
int retval=0, nc, i;
if(subsamp<0 || subsamp>=NUMSUBOPT)
_throw("tjBufSizeYUV2(): Invalid argument");
nc=(subsamp==TJSAMP_GRAY? 1:3);
for(i=0; i<nc; i++)
{
int pw=tjPlaneWidth(i, width, subsamp);
int stride=PAD(pw, pad);
int ph=tjPlaneHeight(i, height, subsamp);
if(pw<0 || ph<0) return -1;
else retval+=stride*ph;
}
bailout:
return retval;
}
DLLEXPORT unsigned long DLLCALL tjBufSizeYUV(int width, int height,
int subsamp)
{
return tjBufSizeYUV2(width, 4, height, subsamp);
}
DLLEXPORT unsigned long DLLCALL TJBUFSIZEYUV(int width, int height,
int subsamp)
{
return tjBufSizeYUV(width, height, subsamp);
}
DLLEXPORT int tjPlaneWidth(int componentID, int width, int subsamp)
{
int pw, nc, retval=0;
if(width<1 || subsamp<0 || subsamp>=TJ_NUMSAMP)
_throw("tjPlaneWidth(): Invalid argument");
nc=(subsamp==TJSAMP_GRAY? 1:3);
if(componentID<0 || componentID>=nc)
_throw("tjPlaneWidth(): Invalid argument");
pw=PAD(width, tjMCUWidth[subsamp]/8);
if(componentID==0)
retval=pw;
else
retval=pw*8/tjMCUWidth[subsamp];
bailout:
return retval;
}
DLLEXPORT int tjPlaneHeight(int componentID, int height, int subsamp)
{
int ph, nc, retval=0;
if(height<1 || subsamp<0 || subsamp>=TJ_NUMSAMP)
_throw("tjPlaneHeight(): Invalid argument");
nc=(subsamp==TJSAMP_GRAY? 1:3);
if(componentID<0 || componentID>=nc)
_throw("tjPlaneHeight(): Invalid argument");
ph=PAD(height, tjMCUHeight[subsamp]/8);
if(componentID==0)
retval=ph;
else
retval=ph*8/tjMCUHeight[subsamp];
bailout:
return retval;
}
DLLEXPORT unsigned long DLLCALL tjPlaneSizeYUV(int componentID, int width,
int stride, int height, int subsamp)
{
unsigned long retval=0;
int pw, ph;
if(width<1 || height<1 || subsamp<0 || subsamp>=NUMSUBOPT)
_throw("tjPlaneSizeYUV(): Invalid argument");
pw=tjPlaneWidth(componentID, width, subsamp);
ph=tjPlaneHeight(componentID, height, subsamp);
if(pw<0 || ph<0) return -1;
if(stride==0) stride=pw;
else stride=abs(stride);
retval=stride*(ph-1)+pw;
bailout:
return retval;
}
DLLEXPORT int DLLCALL tjCompress2(tjhandle handle, const unsigned char *srcBuf,
int width, int pitch, int height, int pixelFormat, unsigned char **jpegBuf,
unsigned long *jpegSize, int jpegSubsamp, int jpegQual, int flags)
{
int i, retval=0, alloc=1; JSAMPROW *row_pointer=NULL;
#ifndef JCS_EXTENSIONS
unsigned char *rgbBuf=NULL;
#endif
getcinstance(handle)
if((this->init&COMPRESS)==0)
_throw("tjCompress2(): Instance has not been initialized for compression");
if(srcBuf==NULL || width<=0 || pitch<0 || height<=0 || pixelFormat<0
|| pixelFormat>=TJ_NUMPF || jpegBuf==NULL || jpegSize==NULL
|| jpegSubsamp<0 || jpegSubsamp>=NUMSUBOPT || jpegQual<0 || jpegQual>100)
_throw("tjCompress2(): Invalid argument");
if(pitch==0) pitch=width*tjPixelSize[pixelFormat];
#ifndef JCS_EXTENSIONS
if(pixelFormat!=TJPF_GRAY && pixelFormat!=TJPF_CMYK)
{
rgbBuf=(unsigned char *)malloc(width*height*RGB_PIXELSIZE);
if(!rgbBuf) _throw("tjCompress2(): Memory allocation failure");
srcBuf=toRGB(srcBuf, width, pitch, height, pixelFormat, rgbBuf);
pitch=width*RGB_PIXELSIZE;
}
#endif
if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*height))==NULL)
_throw("tjCompress2(): Memory allocation failure");
if(setjmp(this->jerr.setjmp_buffer))
{
/* If we get here, the JPEG code has signaled an error. */
retval=-1; goto bailout;
}
cinfo->image_width=width;
cinfo->image_height=height;
if(flags&TJFLAG_FORCEMMX) putenv("JSIMD_FORCEMMX=1");
else if(flags&TJFLAG_FORCESSE) putenv("JSIMD_FORCESSE=1");
else if(flags&TJFLAG_FORCESSE2) putenv("JSIMD_FORCESSE2=1");
if(flags&TJFLAG_NOREALLOC)
{
alloc=0; *jpegSize=tjBufSize(width, height, jpegSubsamp);
}
jpeg_mem_dest_tj(cinfo, jpegBuf, jpegSize, alloc);
if(setCompDefaults(cinfo, pixelFormat, jpegSubsamp, jpegQual, flags)==-1)
return -1;
jpeg_start_compress(cinfo, TRUE);
for(i=0; i<height; i++)
{
if(flags&TJFLAG_BOTTOMUP)
row_pointer[i]=(JSAMPROW)&srcBuf[(height-i-1)*pitch];
else row_pointer[i]=(JSAMPROW)&srcBuf[i*pitch];
}
while(cinfo->next_scanline<cinfo->image_height)
{
jpeg_write_scanlines(cinfo, &row_pointer[cinfo->next_scanline],
cinfo->image_height-cinfo->next_scanline);
}
jpeg_finish_compress(cinfo);
bailout:
if(cinfo->global_state>CSTATE_START) jpeg_abort_compress(cinfo);
#ifndef JCS_EXTENSIONS
if(rgbBuf) free(rgbBuf);
#endif
if(row_pointer) free(row_pointer);
if(this->jerr.warning) retval=-1;
return retval;
}
DLLEXPORT int DLLCALL tjCompress(tjhandle handle, unsigned char *srcBuf,
int width, int pitch, int height, int pixelSize, unsigned char *jpegBuf,
unsigned long *jpegSize, int jpegSubsamp, int jpegQual, int flags)
{
int retval=0; unsigned long size;
if(flags&TJ_YUV)
{
size=tjBufSizeYUV(width, height, jpegSubsamp);
retval=tjEncodeYUV2(handle, srcBuf, width, pitch, height,
getPixelFormat(pixelSize, flags), jpegBuf, jpegSubsamp, flags);
}
else
{
retval=tjCompress2(handle, srcBuf, width, pitch, height,
getPixelFormat(pixelSize, flags), &jpegBuf, &size, jpegSubsamp, jpegQual,
flags|TJFLAG_NOREALLOC);
}
*jpegSize=size;
return retval;
}
DLLEXPORT int DLLCALL tjEncodeYUVPlanes(tjhandle handle,
const unsigned char *srcBuf, int width, int pitch, int height,
int pixelFormat, unsigned char **dstPlanes, int *strides, int subsamp,
int flags)
{
int i, retval=0; JSAMPROW *row_pointer=NULL;
JSAMPLE *_tmpbuf[MAX_COMPONENTS], *_tmpbuf2[MAX_COMPONENTS];
JSAMPROW *tmpbuf[MAX_COMPONENTS], *tmpbuf2[MAX_COMPONENTS];
JSAMPROW *outbuf[MAX_COMPONENTS];
int row, pw0, ph0, pw[MAX_COMPONENTS], ph[MAX_COMPONENTS];
JSAMPLE *ptr;
jpeg_component_info *compptr;
#ifndef JCS_EXTENSIONS
unsigned char *rgbBuf=NULL;
#endif
getcinstance(handle);
for(i=0; i<MAX_COMPONENTS; i++)
{
tmpbuf[i]=NULL; _tmpbuf[i]=NULL;
tmpbuf2[i]=NULL; _tmpbuf2[i]=NULL; outbuf[i]=NULL;
}
if((this->init&COMPRESS)==0)
_throw("tjEncodeYUVPlanes(): Instance has not been initialized for compression");
if(srcBuf==NULL || width<=0 || pitch<0 || height<=0 || pixelFormat<0
|| pixelFormat>=TJ_NUMPF || !dstPlanes || !dstPlanes[0] || subsamp<0
|| subsamp>=NUMSUBOPT)
_throw("tjEncodeYUVPlanes(): Invalid argument");
if(subsamp!=TJSAMP_GRAY && (!dstPlanes[1] || !dstPlanes[2]))
_throw("tjEncodeYUVPlanes(): Invalid argument");
if(pixelFormat==TJPF_CMYK)
_throw("tjEncodeYUVPlanes(): Cannot generate YUV images from CMYK pixels");
if(pitch==0) pitch=width*tjPixelSize[pixelFormat];
#ifndef JCS_EXTENSIONS
if(pixelFormat!=TJPF_GRAY && pixelFormat!=TJPF_CMYK)
{
rgbBuf=(unsigned char *)malloc(width*height*RGB_PIXELSIZE);
if(!rgbBuf) _throw("tjEncodeYUVPlanes(): Memory allocation failure");
srcBuf=toRGB(srcBuf, width, pitch, height, pixelFormat, rgbBuf);
pitch=width*RGB_PIXELSIZE;
}
#endif
if(setjmp(this->jerr.setjmp_buffer))
{
/* If we get here, the JPEG code has signaled an error. */
retval=-1; goto bailout;
}
cinfo->image_width=width;
cinfo->image_height=height;
if(flags&TJFLAG_FORCEMMX) putenv("JSIMD_FORCEMMX=1");
else if(flags&TJFLAG_FORCESSE) putenv("JSIMD_FORCESSE=1");
else if(flags&TJFLAG_FORCESSE2) putenv("JSIMD_FORCESSE2=1");
if(setCompDefaults(cinfo, pixelFormat, subsamp, -1, flags)==-1) return -1;
/* Execute only the parts of jpeg_start_compress() that we need. If we
were to call the whole jpeg_start_compress() function, then it would try
to write the file headers, which could overflow the output buffer if the
YUV image were very small. */
if(cinfo->global_state!=CSTATE_START)
_throw("tjEncodeYUVPlanes(): libjpeg API is in the wrong state");
(*cinfo->err->reset_error_mgr)((j_common_ptr)cinfo);
jinit_c_master_control(cinfo, FALSE);
jinit_color_converter(cinfo);
jinit_downsampler(cinfo);
(*cinfo->cconvert->start_pass)(cinfo);
pw0=PAD(width, cinfo->max_h_samp_factor);
ph0=PAD(height, cinfo->max_v_samp_factor);
if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ph0))==NULL)
_throw("tjEncodeYUVPlanes(): Memory allocation failure");
for(i=0; i<height; i++)
{
if(flags&TJFLAG_BOTTOMUP)
row_pointer[i]=(JSAMPROW)&srcBuf[(height-i-1)*pitch];
else row_pointer[i]=(JSAMPROW)&srcBuf[i*pitch];
}
if(height<ph0)
for(i=height; i<ph0; i++) row_pointer[i]=row_pointer[height-1];
for(i=0; i<cinfo->num_components; i++)
{
compptr=&cinfo->comp_info[i];
_tmpbuf[i]=(JSAMPLE *)malloc(
PAD((compptr->width_in_blocks*cinfo->max_h_samp_factor*DCTSIZE)
/compptr->h_samp_factor, 16) * cinfo->max_v_samp_factor + 16);
if(!_tmpbuf[i]) _throw("tjEncodeYUVPlanes(): Memory allocation failure");
tmpbuf[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*cinfo->max_v_samp_factor);
if(!tmpbuf[i]) _throw("tjEncodeYUVPlanes(): Memory allocation failure");
for(row=0; row<cinfo->max_v_samp_factor; row++)
{
unsigned char *_tmpbuf_aligned=
(unsigned char *)PAD((size_t)_tmpbuf[i], 16);
tmpbuf[i][row]=&_tmpbuf_aligned[
PAD((compptr->width_in_blocks*cinfo->max_h_samp_factor*DCTSIZE)
/compptr->h_samp_factor, 16) * row];
}
_tmpbuf2[i]=(JSAMPLE *)malloc(PAD(compptr->width_in_blocks*DCTSIZE, 16)
* compptr->v_samp_factor + 16);
if(!_tmpbuf2[i]) _throw("tjEncodeYUVPlanes(): Memory allocation failure");
tmpbuf2[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*compptr->v_samp_factor);
if(!tmpbuf2[i]) _throw("tjEncodeYUVPlanes(): Memory allocation failure");
for(row=0; row<compptr->v_samp_factor; row++)
{
unsigned char *_tmpbuf2_aligned=
(unsigned char *)PAD((size_t)_tmpbuf2[i], 16);
tmpbuf2[i][row]=&_tmpbuf2_aligned[
PAD(compptr->width_in_blocks*DCTSIZE, 16) * row];
}
pw[i]=pw0*compptr->h_samp_factor/cinfo->max_h_samp_factor;
ph[i]=ph0*compptr->v_samp_factor/cinfo->max_v_samp_factor;
outbuf[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ph[i]);
if(!outbuf[i]) _throw("tjEncodeYUVPlanes(): Memory allocation failure");
ptr=dstPlanes[i];
for(row=0; row<ph[i]; row++)
{
outbuf[i][row]=ptr;
ptr+=(strides && strides[i]!=0)? strides[i]:pw[i];
}
}
if(setjmp(this->jerr.setjmp_buffer))
{
/* If we get here, the JPEG code has signaled an error. */
retval=-1; goto bailout;
}
for(row=0; row<ph0; row+=cinfo->max_v_samp_factor)
{
(*cinfo->cconvert->color_convert)(cinfo, &row_pointer[row], tmpbuf, 0,
cinfo->max_v_samp_factor);
(cinfo->downsample->downsample)(cinfo, tmpbuf, 0, tmpbuf2, 0);
for(i=0, compptr=cinfo->comp_info; i<cinfo->num_components; i++, compptr++)
jcopy_sample_rows(tmpbuf2[i], 0, outbuf[i],