]> granicus.if.org Git - libjpeg-turbo/commitdiff
Merge the TurboJPEG planar YUV encoding feature from VirtualGL 2.2
authorDRC <dcommander@users.sourceforge.net>
Wed, 24 Nov 2010 04:02:37 +0000 (04:02 +0000)
committerDRC <dcommander@users.sourceforge.net>
Wed, 24 Nov 2010 04:02:37 +0000 (04:02 +0000)
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@305 632fc199-4ca6-4c93-a231-07263d6284db

CMakeLists.txt
ChangeLog.txt
Makefile.am
jpegut.c
jpgtest.cxx
turbojpeg.h
turbojpegl.c

index cf86b5790d4e21c8eb370b15fdf71030728d4f35..a6c6cd71c86be883df6887cd172f31826c08565b 100644 (file)
@@ -209,6 +209,7 @@ add_executable(wrjpgcom rdjpgcom.c)
 
 enable_testing()
 add_test(jpegut jpegut)
+add_test(jpegut-yuv jpegut -yuv)
 add_test(cjpeg-int sharedlib/cjpeg -dct int -outfile testoutint.jpg ${CMAKE_SOURCE_DIR}/testorig.ppm)
 add_test(cjpeg-int-cmp ${CMAKE_COMMAND} -E compare_files ${CMAKE_SOURCE_DIR}/testimgint.jpg testoutint.jpg)
 add_test(cjpeg-fast sharedlib/cjpeg -dct fast -opt -outfile testoutfst.jpg ${CMAKE_SOURCE_DIR}/testorig.ppm)
@@ -251,6 +252,7 @@ add_test(jpegtran-crop sharedlib/jpegtran -crop 120x90+20+50 -transpose -perfect
 add_test(jpegtran-crop-cmp ${CMAKE_COMMAND} -E compare_files ${CMAKE_SOURCE_DIR}/testimgcrop.jpg testoutcrop.jpg)
 
 add_test(jpegut-static jpegut-static)
+add_test(jpegut-static-yuv jpegut-static -yuv)
 add_test(cjpeg-static-int cjpeg-static -dct int -outfile testoutint.jpg ${CMAKE_SOURCE_DIR}/testorig.ppm)
 add_test(cjpeg-static-int-cmp ${CMAKE_COMMAND} -E compare_files ${CMAKE_SOURCE_DIR}/testimgint.jpg testoutint.jpg)
 add_test(cjpeg-static-fast cjpeg-static -dct fast -opt -outfile testoutfst.jpg ${CMAKE_SOURCE_DIR}/testorig.ppm)
index f250c8a840ac354c02f2d67ed4adc90271f3d646..7a7a6713ba36e01a15535ff2a38300517bc2ca99 100644 (file)
@@ -21,6 +21,9 @@ when the library is built with libjpeg v6b emulation.
 [7] Added arithmetic encoding and decoding support (can be disabled via
 configure or CMake options)
 
+[8] TurboJPEG/OSS can now leverage the SIMD-accelerated color conversion
+routines in libjpeg-turbo to generate planar YUV images from RGB input.
+
 
 Significant changes since 1.0.0
 ===============================
index 74df22574131206831a7f122dd144da56f8d7709..2f7e773ecd2ea04b1622292d5b4e386ec800c3c7 100644 (file)
@@ -124,6 +124,7 @@ dist-hook:
 
 test: testclean all
        ./jpegut
+       ./jpegut -yuv
        ./cjpeg -dct int -outfile testoutint.jpg $(srcdir)/testorig.ppm
        cmp $(srcdir)/testimgint.jpg testoutint.jpg
        ./cjpeg -dct fast -opt -outfile testoutfst.jpg $(srcdir)/testorig.ppm
index db46b6da4cbb9c8472ef800ce0e2b01b496a5230..3344ca82df16f4a793ee0442fa0f8ced1817b78e 100644 (file)
--- a/jpegut.c
+++ b/jpegut.c
@@ -1,6 +1,6 @@
 /* Copyright (C)2004 Landmark Graphics Corporation
  * Copyright (C)2005 Sun Microsystems, Inc.
- * Copyright (C)2009 D. R. Commander
+ * Copyright (C)2009-2010 D. R. Commander
  *
  * This library is free software and may be redistributed and/or modified under
  * the terms of the wxWindows Library License, Version 3.1 or (at your option)
 #include <string.h>
 #include "./rrtimer.h"
 #include "./turbojpeg.h"
+#ifndef _WIN32
+ #define stricmp strcasecmp
+#endif
 
 #define _catch(f) {if((f)==-1) {printf("TJPEG: %s\n", tjGetErrorStr());  bailout();}}
 
 const char *_subnamel[NUMSUBOPT]={"4:4:4", "4:2:2", "4:2:0", "GRAY"};
 const char *_subnames[NUMSUBOPT]={"444", "422", "420", "GRAY"};
+const int _hsf[NUMSUBOPT]={1, 2, 2, 1};
+const int _vsf[NUMSUBOPT]={1, 1, 2, 1};
+
+int yuv=0;
 
 int exitstatus=0;
 #define bailout() {exitstatus=-1;  goto finally;}
@@ -197,6 +204,126 @@ int checkbuf(unsigned char *buf, int w, int h, int ps, int subsamp, int flags)
        return 1;
 }
 
+#define checkval(v, cv) { \
+       if(v<cv-1 || v>cv+1) { \
+               printf("\nComp. %s at %d,%d should be %d, not %d\n", #v, i, j, cv, v); \
+               retval=0;  goto bailout; \
+       }}
+
+#define checkval0(v) { \
+       if(v>1) { \
+               printf("\nComp. %s at %d,%d should be 0, not %d\n", #v, i, j, v); \
+               retval=0;  goto bailout; \
+       }}
+
+#define checkval255(v) { \
+       if(v<254 && !(v==217 && i==0 && j==21)) { \
+               printf("\nComp. %s at %d,%d should be 255, not %d\n", #v, i, j, v); \
+               retval=0;  goto bailout; \
+       }}
+
+#define PAD(v, p) ((v+(p)-1)&(~((p)-1)))
+
+int checkbufyuv(unsigned char *buf, unsigned long size, int w, int h,
+       int subsamp)
+{
+       int i, j;
+       int hsf=_hsf[subsamp], vsf=_vsf[subsamp];
+       int pw=PAD(w, hsf), ph=PAD(h, vsf);
+       int cw=pw/hsf, ch=ph/vsf;
+       int ypitch=PAD(pw, 4), uvpitch=PAD(cw, 4);
+       int retval=1;
+       unsigned long correctsize=ypitch*ph + (subsamp==TJ_GRAYSCALE? 0:uvpitch*ch*2);
+
+       if(size!=correctsize)
+       {
+               printf("\nIncorrect size %lu.  Should be %lu\n", size, correctsize);
+               retval=0;  goto bailout;
+       }
+
+       for(i=0; i<16; i++)
+       {
+               for(j=0; j<pw; j++)
+               {
+                       unsigned char y=buf[ypitch*i+j];
+                       if(((i/8)+(j/8))%2==0) checkval255(y)
+                       else checkval(y, 76)
+               }
+       }
+       for(i=16; i<ph; i++)
+       {
+               for(j=0; j<pw; j++)
+               {
+                       unsigned char y=buf[ypitch*i+j];
+                       if(((i/8)+(j/8))%2==0) checkval0(y)
+                       else checkval(y, 226)
+               }
+       }
+       if(subsamp!=TJ_GRAYSCALE)
+       {
+               for(i=0; i<16/vsf; i++)
+               {
+                       for(j=0; j<cw; j++)
+                       {
+                               unsigned char u=buf[ypitch*ph + (uvpitch*i+j)],
+                                       v=buf[ypitch*ph + uvpitch*ch + (uvpitch*i+j)];
+                               if(((i*vsf/8)+(j*hsf/8))%2==0)
+                               {
+                                       checkval(u, 128);  checkval(v, 128);
+                               }
+                               else
+                               {
+                                       checkval(u, 85);  checkval255(v);
+                               }
+                       }
+               }
+               for(i=16/vsf; i<ch; i++)
+               {
+                       for(j=0; j<cw; j++)
+                       {
+                               unsigned char u=buf[ypitch*ph + (uvpitch*i+j)],
+                                       v=buf[ypitch*ph + uvpitch*ch + (uvpitch*i+j)];
+                               if(((i*vsf/8)+(j*hsf/8))%2==0)
+                               {
+                                       checkval(u, 128);  checkval(v, 128);
+                               }
+                               else
+                               {
+                                       checkval0(u);  checkval(v, 149);
+                               }
+                       }
+               }
+       }
+
+       bailout:
+       if(retval==0)
+       {
+               for(i=0; i<ph; i++)
+               {
+                       for(j=0; j<pw; j++)
+                               printf("%.3d ", buf[ypitch*i+j]);
+                       printf("\n");
+               }
+               printf("\n");
+               for(i=0; i<ch; i++)
+               {
+                       for(j=0; j<cw; j++)
+                               printf("%.3d ", buf[ypitch*ph + (uvpitch*i+j)]);
+                       printf("\n");
+               }
+               printf("\n");
+               for(i=0; i<ch; i++)
+               {
+                       for(j=0; j<cw; j++)
+                               printf("%.3d ", buf[ypitch*ph + uvpitch*ch + (uvpitch*i+j)]);
+                       printf("\n");
+               }
+               printf("\n");
+       }
+
+       return retval;
+}
+
 void writejpeg(unsigned char *jpegbuf, unsigned long jpgbufsize, char *filename)
 {
        FILE *outfile=NULL;
@@ -221,6 +348,8 @@ void gentestjpeg(tjhandle hnd, unsigned char *jpegbuf, unsigned long *size,
        char tempstr[1024];  unsigned char *bmpbuf=NULL;
        const char *pixformat;  double t;
 
+       if(yuv) flags|=TJ_YUV;
+
        if(flags&TJ_BGR)
        {
                if(ps==3) pixformat="BGR";
@@ -232,8 +361,12 @@ void gentestjpeg(tjhandle hnd, unsigned char *jpegbuf, unsigned long *size,
                else {if(flags&TJ_ALPHAFIRST) pixformat="ARGB";  else pixformat="RGBA";}
        }
        if(ps==1) pixformat="Grayscale";
-       printf("%s %s -> %s Q%d ... ", pixformat,
-               (flags&TJ_BOTTOMUP)?"Bottom-Up":"Top-Down ", _subnamel[subsamp], qual);
+       if(yuv)
+               printf("%s %s -> %s YUV ... ", pixformat,
+                       (flags&TJ_BOTTOMUP)?"Bottom-Up":"Top-Down ", _subnamel[subsamp]);
+       else
+               printf("%s %s -> %s Q%d ... ", pixformat,
+                       (flags&TJ_BOTTOMUP)?"Bottom-Up":"Top-Down ", _subnamel[subsamp], qual);
 
        if((bmpbuf=(unsigned char *)malloc(w*h*ps+1))==NULL)
        {
@@ -246,10 +379,20 @@ void gentestjpeg(tjhandle hnd, unsigned char *jpegbuf, unsigned long *size,
        _catch(tjCompress(hnd, bmpbuf, w, 0, h, ps, jpegbuf, size, subsamp, qual, flags));
        t=rrtime()-t;
 
-       sprintf(tempstr, "%s_enc_%s_%s_%sQ%d.jpg", basefilename, pixformat,
-               (flags&TJ_BOTTOMUP)? "BU":"TD", _subnames[subsamp], qual);
+       if(yuv)
+               sprintf(tempstr, "%s_enc_%s_%s_%s.yuv", basefilename, pixformat,
+                       (flags&TJ_BOTTOMUP)? "BU":"TD", _subnames[subsamp]);
+       else
+               sprintf(tempstr, "%s_enc_%s_%s_%sQ%d.jpg", basefilename, pixformat,
+                       (flags&TJ_BOTTOMUP)? "BU":"TD", _subnames[subsamp], qual);
        writejpeg(jpegbuf, *size, tempstr);
-       printf("Done.  %f ms\n  Result in %s\n", t*1000., tempstr);
+       if(yuv)
+       {
+               if(checkbufyuv(jpegbuf, *size, w, h, subsamp)) printf("Passed.");
+               else printf("FAILED!");
+       }
+       else printf("Done.");
+       printf("  %f ms\n  Result in %s\n", t*1000., tempstr);
 
        finally:
        if(bmpbuf) free(bmpbuf);
@@ -261,6 +404,8 @@ void gentestbmp(tjhandle hnd, unsigned char *jpegbuf, unsigned long jpegsize,
        unsigned char *bmpbuf=NULL;
        const char *pixformat;  int _w=0, _h=0;  double t;
 
+       if(yuv) return;
+
        if(flags&TJ_BGR)
        {
                if(ps==3) pixformat="BGR";
@@ -404,8 +549,16 @@ void dotest1(void)
 
 int main(int argc, char *argv[])
 {
+       if(argc>1 && !stricmp(argv[1], "-yuv")) yuv=1;
        dotest(35, 41, 3, TJ_444, "test");
        dotest(35, 41, 4, TJ_444, "test");
+       if(yuv)
+       {
+               dotest(35, 41, 3, TJ_422, "test");
+               dotest(35, 41, 4, TJ_422, "test");
+               dotest(35, 41, 3, TJ_420, "test");
+               dotest(35, 41, 4, TJ_420, "test");
+       }
        dotest(35, 41, 1, TJ_GRAYSCALE, "test");
        dotest(35, 41, 3, TJ_GRAYSCALE, "test");
        dotest(35, 41, 4, TJ_GRAYSCALE, "test");
index 79de5cf9aca38be998ac2ffdb96e4305800449f3..96e5173f7d079645cf50b7b1018845b8079fe2c9 100644 (file)
@@ -30,7 +30,7 @@
 #define _throwbmp(m) _throw(m, bmpgeterr())
 
 int forcemmx=0, forcesse=0, forcesse2=0, forcesse3=0, fastupsample=0,
-       decomponly=0;
+       decomponly=0, yuv=0;
 const int _ps[BMPPIXELFORMATS]={3, 4, 3, 4, 4, 4};
 const int _flags[BMPPIXELFORMATS]={0, 0, TJ_BGR, TJ_BGR,
        TJ_BGR|TJ_ALPHAFIRST, TJ_ALPHAFIRST};
@@ -76,12 +76,20 @@ void dotest(unsigned char *srcbuf, int w, int h, BMPPIXELFORMAT pf, int bu,
 
        flags |= _flags[pf];
        if(bu) flags |= TJ_BOTTOMUP;
+       if(yuv) flags |= TJ_YUV;
 
        if((rgbbuf=(unsigned char *)malloc(pitch*h)) == NULL)
                _throwunix("allocating image buffer");
 
-       if(!quiet) printf("\n>>>>>  %s (%s) <--> JPEG %s Q%d  <<<<<\n", _pfname[pf],
-               bu?"Bottom-up":"Top-down", _subnamel[jpegsub], qual);
+       if(!quiet)
+       {
+               if(yuv)
+                       printf("\n>>>>>  %s (%s) <--> YUV %s  <<<<<\n", _pfname[pf],
+                               bu?"Bottom-up":"Top-down", _subnamel[jpegsub]);
+               else
+                       printf("\n>>>>>  %s (%s) <--> JPEG %s Q%d  <<<<<\n", _pfname[pf],
+                               bu?"Bottom-up":"Top-down", _subnamel[jpegsub], qual);
+       }
        if(dotile) {tilesizex=tilesizey=4;}  else {tilesizex=w;  tilesizey=h;}
 
        do
@@ -155,7 +163,10 @@ void dotest(unsigned char *srcbuf, int w, int h, BMPPIXELFORMAT pf, int bu,
                }
                if(tilesizex==w && tilesizey==h)
                {
-                       sprintf(tempstr, "%s_%sQ%d.jpg", filename, _subnames[jpegsub], qual);
+                       if(yuv)
+                               sprintf(tempstr, "%s_%s.yuv", filename, _subnames[jpegsub]);
+                       else
+                               sprintf(tempstr, "%s_%sQ%d.jpg", filename, _subnames[jpegsub], qual);
                        if((outfile=fopen(tempstr, "wb"))==NULL)
                                _throwunix("opening reference image");
                        if(fwrite(jpegbuf[0], jpgbufsize, 1, outfile)!=1)
@@ -163,6 +174,7 @@ void dotest(unsigned char *srcbuf, int w, int h, BMPPIXELFORMAT pf, int bu,
                        fclose(outfile);
                        if(!quiet) printf("Reference image written to %s\n", tempstr);
                }
+               if(yuv) goto bailout;
 
                // Decompression test
                memset(rgbbuf, 127, pitch*h);  // Grey image means decompressor did nothing
@@ -371,7 +383,9 @@ void usage(char *progname)
        printf("       Use fast, inaccurate upsampling code to perform 4:2:2 and 4:2:0\n");
        printf("       YUV decoding in libjpeg decompressor\n\n");
        printf("       [-quiet]\n");
-       printf("       Output in tabular rather than verbose format\n\n");
+       printf("       Output in tabular rather than verbose format\n");
+       printf("       [-yuv]\n");
+       printf("       Encode RGB input as planar YUV rather than compressing as JPEG\n\n");
        printf("       NOTE: If the quality is specified as a range, i.e. 90-100, a separate\n");
        printf("       test will be performed for all quality values in the range.\n");
        exit(1);
@@ -441,6 +455,11 @@ int main(int argc, char *argv[])
                                printf("Using fast upsampling code\n");
                                fastupsample=1;
                        }
+                       if(!stricmp(argv[i], "-yuv"))
+                       {
+                               printf("Testing YUV planar encoding\n");
+                               yuv=1;
+                       }
                        if(!stricmp(argv[i], "-rgb")) pf=BMP_RGB;
                        if(!stricmp(argv[i], "-rgba")) pf=BMP_RGBA;
                        if(!stricmp(argv[i], "-bgr")) pf=BMP_BGR;
index e382e71549706df2ce6786ccd78c769091123e29..b4bbd2d6666fcfa7b579b8c141c9ec6020fb84bb 100644 (file)
@@ -53,6 +53,15 @@ enum {TJ_444=0, TJ_422, TJ_420, TJ_GRAYSCALE};
 #define TJ_FASTUPSAMPLE  256
   /* Use fast, inaccurate 4:2:2 and 4:2:0 YUV upsampling routines
      (libjpeg version only) */
+#define TJ_YUV           512
+  /* Use the TurboJPEG YUV encoder to produce a planar YUV image that is
+     suitable for X Video.  Specifically, if either the width or the height is
+     subsampled, then that dimension is padded to 2 in the output image.  Also,
+     each line of each plane in the output image is padded to 4 bytes.
+     Although this will work with any subsampling option, it is really only
+     useful in combination with TJ_420, which produces an image compatible
+     with the I420 format. */
+
 typedef void* tjhandle;
 
 #define TJPAD(p) (((p)+3)&(~3))
index 03833c504d04dd744775f0bddb1ae327a5353d09..1d719cb59ac41189f90e65a29f45709496297dff 100644 (file)
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#define JPEG_INTERNALS
 #include <jpeglib.h>
 #include <jerror.h>
 #include <setjmp.h>
 #include "./turbojpeg.h"
+#ifdef sun
+#include <malloc.h>
+#endif
+
+void *__memalign(size_t boundary, size_t size)
+{
+       #if defined(_WIN32) || defined(__APPLE__)
+       return malloc(size);
+       #else
+       #ifdef sun
+       return memalign(boundary, size);
+       #else
+       void *ptr=NULL;
+       posix_memalign(&ptr, boundary, size);
+       return ptr;
+       #endif
+       #endif
+}
+
+#ifndef min
+ #define min(a,b) ((a)<(b)?(a):(b))
+#endif
+
+#define PAD(v, p) ((v+(p)-1)&(~((p)-1)))
 
 
 // Error handling
@@ -117,9 +142,18 @@ DLLEXPORT int DLLCALL tjCompress(tjhandle h,
        int jpegsub, int qual, int flags)
 {
        int i;  JSAMPROW *row_pointer=NULL;
+       JSAMPLE *_tmpbuf[MAX_COMPONENTS], *_tmpbuf2[MAX_COMPONENTS];
+       JSAMPROW *tmpbuf[MAX_COMPONENTS], *tmpbuf2[MAX_COMPONENTS];
+       JSAMPROW *outbuf[MAX_COMPONENTS];
 
        checkhandle(h);
 
+       for(i=0; i<MAX_COMPONENTS; i++)
+       {
+               tmpbuf[i]=NULL;  _tmpbuf[i]=NULL;
+               tmpbuf2[i]=NULL;  _tmpbuf2[i]=NULL;  outbuf[i]=NULL;
+       }
+
        if(srcbuf==NULL || width<=0 || pitch<0 || height<=0
                || dstbuf==NULL || size==NULL
                || jpegsub<0 || jpegsub>=NUMSUBOPT || qual<0 || qual>100)
@@ -158,6 +192,14 @@ DLLEXPORT int DLLCALL tjCompress(tjhandle h,
        if(setjmp(j->jerr.jb))
        {  // this will execute if LIBJPEG has an error
                if(row_pointer) free(row_pointer);
+               for(i=0; i<MAX_COMPONENTS; i++)
+               {
+                       if(tmpbuf[i]!=NULL) free(tmpbuf[i]);
+                       if(_tmpbuf[i]!=NULL) free(_tmpbuf[i]);
+                       if(tmpbuf2[i]!=NULL) free(tmpbuf2[i]);
+                       if(_tmpbuf2[i]!=NULL) free(_tmpbuf2[i]);
+                       if(outbuf[i]!=NULL) free(outbuf[i]);
+               }
                return -1;
        }
 
@@ -180,24 +222,105 @@ DLLEXPORT int DLLCALL tjCompress(tjhandle h,
        j->jdms.next_output_byte = dstbuf;
        j->jdms.free_in_buffer = TJBUFSIZE(j->cinfo.image_width, j->cinfo.image_height);
 
-       if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*height))==NULL)
-               _throw("Memory allocation failed in tjInitCompress()");
-       for(i=0; i<height; i++)
+       jpeg_start_compress(&j->cinfo, TRUE);
+       if(flags&TJ_YUV)
        {
-               if(flags&TJ_BOTTOMUP) row_pointer[i]= &srcbuf[(height-i-1)*pitch];
-               else row_pointer[i]= &srcbuf[i*pitch];
+               j_compress_ptr cinfo=&j->cinfo;
+               int row;
+               int pw=PAD(width, cinfo->max_h_samp_factor);
+               int ph=PAD(height, cinfo->max_v_samp_factor);
+               int cw[MAX_COMPONENTS], ch[MAX_COMPONENTS];
+               jpeg_component_info *compptr;
+               JSAMPLE *ptr=dstbuf;  unsigned long yuvsize=0;
+
+               if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ph))==NULL)
+                       _throw("Memory allocation failed in tjCompress()");
+               for(i=0; i<height; i++)
+               {
+                       if(flags&TJ_BOTTOMUP) row_pointer[i]= &srcbuf[(height-i-1)*pitch];
+                       else row_pointer[i]= &srcbuf[i*pitch];
+               }
+               if(height<ph)
+                       for(i=height; i<ph; i++) row_pointer[i]=row_pointer[height-1];
+
+               for(i=0; i<cinfo->num_components; i++)
+               {
+                       compptr=&cinfo->comp_info[i];
+                       _tmpbuf[i]=(JSAMPLE *)__memalign(16,
+                               PAD((compptr->width_in_blocks*cinfo->max_h_samp_factor*DCTSIZE)
+                                       /compptr->h_samp_factor, 16) * cinfo->max_v_samp_factor);
+                       if(!_tmpbuf[i]) _throw("Memory allocation failure");
+                       tmpbuf[i]=(JSAMPROW *)__memalign(16,
+                               sizeof(JSAMPROW)*cinfo->max_v_samp_factor);
+                       if(!tmpbuf[i]) _throw("Memory allocation failure");
+                       for(row=0; row<cinfo->max_v_samp_factor; row++)
+                               tmpbuf[i][row]=&_tmpbuf[i][
+                                       PAD((compptr->width_in_blocks*cinfo->max_h_samp_factor*DCTSIZE)
+                                               /compptr->h_samp_factor, 16) * row];
+                       _tmpbuf2[i]=(JSAMPLE *)__memalign(16,
+                               PAD(compptr->width_in_blocks*DCTSIZE, 16) * compptr->v_samp_factor);
+                       if(!_tmpbuf2[i]) _throw("Memory allocation failure");
+                       tmpbuf2[i]=(JSAMPROW *)__memalign(16,
+                               sizeof(JSAMPROW)*compptr->v_samp_factor);
+                       if(!tmpbuf2[i]) _throw("Memory allocation failure");
+                       for(row=0; row<compptr->v_samp_factor; row++)
+                               tmpbuf2[i][row]=&_tmpbuf2[i][
+                                       PAD(compptr->width_in_blocks*DCTSIZE, 16) * row];
+                       cw[i]=pw*compptr->h_samp_factor/cinfo->max_h_samp_factor;
+                       ch[i]=ph*compptr->v_samp_factor/cinfo->max_v_samp_factor;
+                       outbuf[i]=(JSAMPROW *)__memalign(16, sizeof(JSAMPROW)*ch[i]);
+                       if(!outbuf[i]) _throw("Memory allocation failure");
+                       for(row=0; row<ch[i]; row++)
+                       {
+                               outbuf[i][row]=ptr;
+                               ptr+=PAD(cw[i], 4);
+                       }
+               }
+               yuvsize=(unsigned long)(ptr-dstbuf);
+
+               for(row=0; row<ph; 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],
+                                       row*compptr->v_samp_factor/cinfo->max_v_samp_factor,
+                                       compptr->v_samp_factor, cw[i]);
+               }
+               *size=yuvsize;
+               cinfo->next_scanline+=height;
        }
-       jpeg_start_compress(&j->cinfo, TRUE);
-       while(j->cinfo.next_scanline<j->cinfo.image_height)
+       else
        {
-               jpeg_write_scanlines(&j->cinfo, &row_pointer[j->cinfo.next_scanline],
-                       j->cinfo.image_height-j->cinfo.next_scanline);
+               if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*height))==NULL)
+                       _throw("Memory allocation failed in tjCompress()");
+               for(i=0; i<height; i++)
+               {
+                       if(flags&TJ_BOTTOMUP) row_pointer[i]= &srcbuf[(height-i-1)*pitch];
+                       else row_pointer[i]= &srcbuf[i*pitch];
+               }
+               while(j->cinfo.next_scanline<j->cinfo.image_height)
+               {
+                       jpeg_write_scanlines(&j->cinfo, &row_pointer[j->cinfo.next_scanline],
+                               j->cinfo.image_height-j->cinfo.next_scanline);
+               }
        }
        jpeg_finish_compress(&j->cinfo);
-       *size=TJBUFSIZE(j->cinfo.image_width, j->cinfo.image_height)
-               -(unsigned long)(j->jdms.free_in_buffer);
+       if(!(flags&TJ_YUV))
+               *size=TJBUFSIZE(j->cinfo.image_width, j->cinfo.image_height)
+                       -(unsigned long)(j->jdms.free_in_buffer);
 
        if(row_pointer) free(row_pointer);
+       for(i=0; i<MAX_COMPONENTS; i++)
+       {
+               if(tmpbuf[i]!=NULL) free(tmpbuf[i]);
+               if(_tmpbuf[i]!=NULL) free(_tmpbuf[i]);
+               if(tmpbuf2[i]!=NULL) free(tmpbuf2[i]);
+               if(_tmpbuf2[i]!=NULL) free(_tmpbuf2[i]);
+               if(outbuf[i]!=NULL) free(outbuf[i]);
+       }
        return 0;
 }
 
@@ -334,6 +457,7 @@ DLLEXPORT int DLLCALL tjDecompress(tjhandle h,
        #else
        #error "TurboJPEG requires JPEG colorspace extensions"
        #endif
+
        if(flags&TJ_FASTUPSAMPLE) j->dinfo.do_fancy_upsampling=FALSE;
 
        jpeg_start_decompress(&j->dinfo);