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Refactored YUVImage Java class so that it supports both unified YUV image buffers as well as separate YUV image planes; modified the JNI functions accordingly and added new helper functions to the TurboJPEG C API (tjPlaneWidth(), tjPlaneHeight(), tjPlaneSizeYUV()) to facilitate those modifications; changed potentially confusing "component width" and "component height" terms to "plane width" and "plane height" and modified variable names in turbojpeg.c to reflect this; numerous other documentation tweaks

Browse Source 
git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1360 632fc199-4ca6-4c93-a231-07263d6284db
This commit is contained in:
DRC
2014-08-17 12:23:49 +00:00
parent 804440b2e1
commit ce6f3d8cd2
28 changed files with 2278 additions and 904 deletions
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282
turbojpeg.c
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@@ -579,15 +579,19 @@ DLLEXPORT unsigned long DLLCALL TJBUFSIZE(int width, int height)
DLLEXPORT unsigned long DLLCALL tjBufSizeYUV2(int width, int pad, int height,
int subsamp)
{
unsigned long retval=0;
int pw, ph, cw, ch;
if(width<1 || height<1 || pad<1 || !isPow2(pad) || subsamp<0
|| subsamp>=NUMSUBOPT)
int retval=0, nc, i;
if(subsamp<0 || subsamp>=NUMSUBOPT)
_throw("tjBufSizeYUV2(): Invalid argument");
pw=PAD(width, tjMCUWidth[subsamp]/8);
ph=PAD(height, tjMCUHeight[subsamp]/8);
cw=pw*8/tjMCUWidth[subsamp]; ch=ph*8/tjMCUHeight[subsamp];
retval=PAD(pw, pad)*ph + (subsamp==TJSAMP_GRAY? 0:PAD(cw, pad)*ch*2);
nc=(subsamp==TJSAMP_GRAY? 1:3);
for(i=0; i<nc; i++)
{
int stride=PAD(tjPlaneWidth(i, width, subsamp), pad);
int ph=tjPlaneHeight(i, height, subsamp);
if(stride<0 || ph<0) return -1;
else retval+=stride*ph;
}
bailout:
return retval;
@@ -606,6 +610,70 @@ DLLEXPORT unsigned long DLLCALL TJBUFSIZEYUV(int width, int height,
}
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(stride==0) stride=pw;
else stride=abs(stride);
retval=stride*(ph-1)+pw;
bailout:
return retval;
}
DLLEXPORT int DLLCALL tjCompress2(tjhandle handle, unsigned char *srcBuf,
int width, int pitch, int height, int pixelFormat, unsigned char **jpegBuf,
unsigned long *jpegSize, int jpegSubsamp, int jpegQual, int flags)
@@ -712,7 +780,7 @@ DLLEXPORT int DLLCALL tjEncodeYUVPlanes(tjhandle handle, unsigned char *srcBuf,
JSAMPLE *_tmpbuf[MAX_COMPONENTS], *_tmpbuf2[MAX_COMPONENTS];
JSAMPROW *tmpbuf[MAX_COMPONENTS], *tmpbuf2[MAX_COMPONENTS];
JSAMPROW *outbuf[MAX_COMPONENTS];
int row, pw, ph, cw[MAX_COMPONENTS], ch[MAX_COMPONENTS];
int row, pw0, ph0, pw[MAX_COMPONENTS], ph[MAX_COMPONENTS];
JSAMPLE *ptr;
jpeg_component_info *compptr;
#ifndef JCS_EXTENSIONS
@@ -780,18 +848,18 @@ DLLEXPORT int DLLCALL tjEncodeYUVPlanes(tjhandle handle, unsigned char *srcBuf,
jinit_downsampler(cinfo);
(*cinfo->cconvert->start_pass)(cinfo);
pw=PAD(width, cinfo->max_h_samp_factor);
ph=PAD(height, cinfo->max_v_samp_factor);
pw0=PAD(width, cinfo->max_h_samp_factor);
ph0=PAD(height, cinfo->max_v_samp_factor);
if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ph))==NULL)
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]=&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];
if(height<ph0)
for(i=height; i<ph0; i++) row_pointer[i]=row_pointer[height-1];
for(i=0; i<cinfo->num_components; i++)
{
@@ -822,19 +890,19 @@ DLLEXPORT int DLLCALL tjEncodeYUVPlanes(tjhandle handle, unsigned char *srcBuf,
tmpbuf2[i][row]=&_tmpbuf2_aligned[
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 *)malloc(sizeof(JSAMPROW)*ch[i]);
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<ch[i]; row++)
for(row=0; row<ph[i]; row++)
{
outbuf[i][row]=ptr;
ptr+=(strides && strides[i]>0)? strides[i]:cw[i];
ptr+=(strides && strides[i]!=0)? strides[i]:pw[i];
}
}
for(row=0; row<ph; row+=cinfo->max_v_samp_factor)
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);
@@ -842,7 +910,7 @@ DLLEXPORT int DLLCALL tjEncodeYUVPlanes(tjhandle handle, unsigned char *srcBuf,
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]);
compptr->v_samp_factor, pw[i]);
}
cinfo->next_scanline+=height;
jpeg_abort_compress(cinfo);
@@ -869,21 +937,29 @@ DLLEXPORT int DLLCALL tjEncodeYUV3(tjhandle handle, unsigned char *srcBuf,
int pad, int subsamp, int flags)
{
unsigned char *dstPlanes[3];
int pw, ph, cw, ch, strides[3], retval=-1;
int pw0, ph0, strides[3], retval=-1;
if(width<=0 || height<=0 || dstBuf==NULL || pad<0 || !isPow2(pad)
|| subsamp<0 || subsamp>=NUMSUBOPT)
_throw("tjEncodeYUV3(): Invalid argument");
pw=PAD(width, tjMCUWidth[subsamp]/8);
ph=PAD(height, tjMCUHeight[subsamp]/8);
cw=pw*8/tjMCUWidth[subsamp]; ch=ph*8/tjMCUHeight[subsamp];
strides[0]=PAD(pw, pad);
strides[1]=strides[2]=(subsamp==TJSAMP_GRAY? 0:PAD(cw, pad));
pw0=tjPlaneWidth(0, width, subsamp);
ph0=tjPlaneHeight(0, height, subsamp);
dstPlanes[0]=dstBuf;
dstPlanes[1]=(subsamp==TJSAMP_GRAY? NULL:dstPlanes[0]+strides[0]*ph);
dstPlanes[2]=(subsamp==TJSAMP_GRAY? NULL:dstPlanes[1]+strides[1]*ch);
strides[0]=PAD(pw0, pad);
if(subsamp==TJSAMP_GRAY)
{
strides[1]=strides[2]=0;
dstPlanes[1]=dstPlanes[2]=NULL;
}
else
{
int pw1=tjPlaneWidth(1, width, subsamp);
int ph1=tjPlaneHeight(1, height, subsamp);
strides[1]=strides[2]=PAD(pw1, pad);
dstPlanes[1]=dstPlanes[0]+strides[0]*ph0;
dstPlanes[2]=dstPlanes[1]+strides[1]*ph1;
}
return tjEncodeYUVPlanes(handle, srcBuf, width, pitch, height, pixelFormat,
dstPlanes, strides, subsamp, flags);
@@ -914,7 +990,7 @@ DLLEXPORT int DLLCALL tjCompressFromYUVPlanes(tjhandle handle,
unsigned char **jpegBuf, unsigned long *jpegSize, int jpegQual, int flags)
{
int i, row, retval=0, alloc=1; JSAMPROW *inbuf[MAX_COMPONENTS];
int cw[MAX_COMPONENTS], ch[MAX_COMPONENTS], iw[MAX_COMPONENTS],
int pw[MAX_COMPONENTS], ph[MAX_COMPONENTS], iw[MAX_COMPONENTS],
tmpbufsize=0, usetmpbuf=0, th[MAX_COMPONENTS];
JSAMPLE *_tmpbuf=NULL, *ptr; JSAMPROW *tmpbuf[MAX_COMPONENTS];
@@ -965,20 +1041,20 @@ DLLEXPORT int DLLCALL tjCompressFromYUVPlanes(tjhandle handle,
int ih;
iw[i]=compptr->width_in_blocks*DCTSIZE;
ih=compptr->height_in_blocks*DCTSIZE;
cw[i]=PAD(cinfo->image_width, cinfo->max_h_samp_factor)
pw[i]=PAD(cinfo->image_width, cinfo->max_h_samp_factor)
*compptr->h_samp_factor/cinfo->max_h_samp_factor;
ch[i]=PAD(cinfo->image_height, cinfo->max_v_samp_factor)
ph[i]=PAD(cinfo->image_height, cinfo->max_v_samp_factor)
*compptr->v_samp_factor/cinfo->max_v_samp_factor;
if(iw[i]!=cw[i] || ih!=ch[i]) usetmpbuf=1;
if(iw[i]!=pw[i] || ih!=ph[i]) usetmpbuf=1;
th[i]=compptr->v_samp_factor*DCTSIZE;
tmpbufsize+=iw[i]*th[i];
if((inbuf[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ch[i]))==NULL)
if((inbuf[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ph[i]))==NULL)
_throw("tjCompressFromYUVPlanes(): Memory allocation failure");
ptr=srcPlanes[i];
for(row=0; row<ch[i]; row++)
for(row=0; row<ph[i]; row++)
{
inbuf[i][row]=ptr;
ptr+=(strides && strides[i]>0)? strides[i]:cw[i];
ptr+=(strides && strides[i]!=0)? strides[i]:pw[i];
}
}
if(usetmpbuf)
@@ -1010,15 +1086,15 @@ DLLEXPORT int DLLCALL tjCompressFromYUVPlanes(tjhandle handle,
if(usetmpbuf)
{
int j, k;
for(j=0; j<min(th[i], ch[i]-crow[i]); j++)
for(j=0; j<min(th[i], ph[i]-crow[i]); j++)
{
memcpy(tmpbuf[i][j], inbuf[i][crow[i]+j], cw[i]);
memcpy(tmpbuf[i][j], inbuf[i][crow[i]+j], pw[i]);
/* Duplicate last sample in row to fill out MCU */
for(k=cw[i]; k<iw[i]; k++) tmpbuf[i][j][k]=tmpbuf[i][j][cw[i]-1];
for(k=pw[i]; k<iw[i]; k++) tmpbuf[i][j][k]=tmpbuf[i][j][pw[i]-1];
}
/* Duplicate last row to fill out MCU */
for(j=ch[i]-crow[i]; j<th[i]; j++)
memcpy(tmpbuf[i][j], tmpbuf[i][ch[i]-crow[i]-1], iw[i]);
for(j=ph[i]-crow[i]; j<th[i]; j++)
memcpy(tmpbuf[i][j], tmpbuf[i][ph[i]-crow[i]-1], iw[i]);
yuvptr[i]=tmpbuf[i];
}
else
@@ -1044,21 +1120,29 @@ DLLEXPORT int DLLCALL tjCompressFromYUV(tjhandle handle, unsigned char *srcBuf,
unsigned long *jpegSize, int jpegQual, int flags)
{
unsigned char *srcPlanes[3];
int pw, ph, cw, ch, strides[3], retval=-1;
int pw0, ph0, strides[3], retval=-1;
if(srcBuf==NULL || width<=0 || pad<1 || height<=0 || subsamp<0
|| subsamp>=NUMSUBOPT)
_throw("tjCompressFromYUV(): Invalid argument");
pw=PAD(width, tjMCUWidth[subsamp]/8);
ph=PAD(height, tjMCUHeight[subsamp]/8);
cw=pw*8/tjMCUWidth[subsamp]; ch=ph*8/tjMCUHeight[subsamp];
strides[0]=PAD(pw, pad);
strides[1]=strides[2]=(subsamp==TJSAMP_GRAY? 0:PAD(cw, pad));
pw0=tjPlaneWidth(0, width, subsamp);
ph0=tjPlaneHeight(0, height, subsamp);
srcPlanes[0]=srcBuf;
srcPlanes[1]=(subsamp==TJSAMP_GRAY? NULL:srcPlanes[0]+strides[0]*ph);
srcPlanes[2]=(subsamp==TJSAMP_GRAY? NULL:srcPlanes[1]+strides[1]*ch);
strides[0]=PAD(pw0, pad);
if(subsamp==TJSAMP_GRAY)
{
strides[1]=strides[2]=0;
srcPlanes[1]=srcPlanes[2]=NULL;
}
else
{
int pw1=tjPlaneWidth(1, width, subsamp);
int ph1=tjPlaneHeight(1, height, subsamp);
strides[1]=strides[2]=PAD(pw1, pad);
srcPlanes[1]=srcPlanes[0]+strides[0]*ph0;
srcPlanes[2]=srcPlanes[1]+strides[1]*ph1;
}
return tjCompressFromYUVPlanes(handle, srcPlanes, width, strides, height,
subsamp, jpegBuf, jpegSize, jpegQual, flags);
@@ -1361,7 +1445,7 @@ DLLEXPORT int DLLCALL tjDecodeYUVPlanes(tjhandle handle,
int i, retval=0; JSAMPROW *row_pointer=NULL;
JSAMPLE *_tmpbuf[MAX_COMPONENTS];
JSAMPROW *tmpbuf[MAX_COMPONENTS], *inbuf[MAX_COMPONENTS];
int row, pw, ph, cw[MAX_COMPONENTS], ch[MAX_COMPONENTS];
int row, pw0, ph0, pw[MAX_COMPONENTS], ph[MAX_COMPONENTS];
JSAMPLE *ptr;
jpeg_component_info *compptr;
#ifndef JCS_EXTENSIONS
@@ -1426,8 +1510,8 @@ DLLEXPORT int DLLCALL tjDecodeYUVPlanes(tjhandle handle,
jinit_master_decompress(dinfo);
(*dinfo->upsample->start_pass)(dinfo);
pw=PAD(width, dinfo->max_h_samp_factor);
ph=PAD(height, dinfo->max_v_samp_factor);
pw0=PAD(width, dinfo->max_h_samp_factor);
ph0=PAD(height, dinfo->max_v_samp_factor);
if(pitch==0) pitch=dinfo->output_width*tjPixelSize[pixelFormat];
@@ -1445,15 +1529,15 @@ DLLEXPORT int DLLCALL tjDecodeYUVPlanes(tjhandle handle,
}
#endif
if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ph))==NULL)
if((row_pointer=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ph0))==NULL)
_throw("tjDecodeYUVPlanes(): Memory allocation failure");
for(i=0; i<height; i++)
{
if(flags&TJFLAG_BOTTOMUP) row_pointer[i]=&dstBuf[(height-i-1)*pitch];
else row_pointer[i]=&dstBuf[i*pitch];
}
if(height<ph)
for(i=height; i<ph; i++) row_pointer[i]=row_pointer[height-1];
if(height<ph0)
for(i=height; i<ph0; i++) row_pointer[i]=row_pointer[height-1];
for(i=0; i<dinfo->num_components; i++)
{
@@ -1470,25 +1554,25 @@ DLLEXPORT int DLLCALL tjDecodeYUVPlanes(tjhandle handle,
tmpbuf[i][row]=&_tmpbuf_aligned[
PAD(compptr->width_in_blocks*DCTSIZE, 16) * row];
}
cw[i]=pw*compptr->h_samp_factor/dinfo->max_h_samp_factor;
ch[i]=ph*compptr->v_samp_factor/dinfo->max_v_samp_factor;
inbuf[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ch[i]);
pw[i]=pw0*compptr->h_samp_factor/dinfo->max_h_samp_factor;
ph[i]=ph0*compptr->v_samp_factor/dinfo->max_v_samp_factor;
inbuf[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ph[i]);
if(!inbuf[i]) _throw("tjDecodeYUVPlanes(): Memory allocation failure");
ptr=srcPlanes[i];
for(row=0; row<ch[i]; row++)
for(row=0; row<ph[i]; row++)
{
inbuf[i][row]=ptr;
ptr+=(strides && strides[i]>0)? strides[i]:cw[i];
ptr+=(strides && strides[i]!=0)? strides[i]:pw[i];
}
}
for(row=0; row<ph; row+=dinfo->max_v_samp_factor)
for(row=0; row<ph0; row+=dinfo->max_v_samp_factor)
{
JDIMENSION inrow=0, outrow=0;
for(i=0, compptr=dinfo->comp_info; i<dinfo->num_components; i++, compptr++)
jcopy_sample_rows(inbuf[i],
row*compptr->v_samp_factor/dinfo->max_v_samp_factor, tmpbuf[i], 0,
compptr->v_samp_factor, cw[i]);
compptr->v_samp_factor, pw[i]);
(dinfo->upsample->upsample)(dinfo, tmpbuf, &inrow,
dinfo->max_v_samp_factor, &row_pointer[row], &outrow,
dinfo->max_v_samp_factor);
@@ -1519,21 +1603,29 @@ DLLEXPORT int DLLCALL tjDecodeYUV(tjhandle handle, unsigned char *srcBuf,
int height, int pixelFormat, int flags)
{
unsigned char *srcPlanes[3];
int pw, ph, cw, ch, strides[3], retval=-1;
int pw0, ph0, strides[3], retval=-1;
if(srcBuf==NULL || pad<0 || !isPow2(pad) || subsamp<0 || subsamp>=NUMSUBOPT
|| width<=0 || height<=0)
_throw("tjDecodeYUV(): Invalid argument");
pw=PAD(width, tjMCUWidth[subsamp]/8);
ph=PAD(height, tjMCUHeight[subsamp]/8);
cw=pw*8/tjMCUWidth[subsamp]; ch=ph*8/tjMCUHeight[subsamp];
strides[0]=PAD(pw, pad);
strides[1]=strides[2]=(subsamp==TJSAMP_GRAY? 0:PAD(cw, pad));
pw0=tjPlaneWidth(0, width, subsamp);
ph0=tjPlaneHeight(0, height, subsamp);
srcPlanes[0]=srcBuf;
srcPlanes[1]=(subsamp==TJSAMP_GRAY? NULL:srcPlanes[0]+strides[0]*ph);
srcPlanes[2]=(subsamp==TJSAMP_GRAY? NULL:srcPlanes[1]+strides[1]*ch);
strides[0]=PAD(pw0, pad);
if(subsamp==TJSAMP_GRAY)
{
strides[1]=strides[2]=0;
srcPlanes[1]=srcPlanes[2]=NULL;
}
else
{
int pw1=tjPlaneWidth(1, width, subsamp);
int ph1=tjPlaneHeight(1, height, subsamp);
strides[1]=strides[2]=PAD(pw1, pad);
srcPlanes[1]=srcPlanes[0]+strides[0]*ph0;
srcPlanes[2]=srcPlanes[1]+strides[1]*ph1;
}
return tjDecodeYUVPlanes(handle, srcPlanes, strides, subsamp, dstBuf, width,
pitch, height, pixelFormat, flags);
@@ -1548,7 +1640,7 @@ DLLEXPORT int DLLCALL tjDecompressToYUVPlanes(tjhandle handle,
{
int i, sfi, row, retval=0; JSAMPROW *outbuf[MAX_COMPONENTS];
int jpegwidth, jpegheight, jpegSubsamp, scaledw, scaledh;
int cw[MAX_COMPONENTS], ch[MAX_COMPONENTS], iw[MAX_COMPONENTS],
int pw[MAX_COMPONENTS], ph[MAX_COMPONENTS], iw[MAX_COMPONENTS],
tmpbufsize=0, usetmpbuf=0, th[MAX_COMPONENTS];
JSAMPLE *_tmpbuf=NULL, *ptr; JSAMPROW *tmpbuf[MAX_COMPONENTS];
int dctsize;
@@ -1620,20 +1712,20 @@ DLLEXPORT int DLLCALL tjDecompressToYUVPlanes(tjhandle handle,
int ih;
iw[i]=compptr->width_in_blocks*dctsize;
ih=compptr->height_in_blocks*dctsize;
cw[i]=PAD(dinfo->output_width, dinfo->max_h_samp_factor)
pw[i]=PAD(dinfo->output_width, dinfo->max_h_samp_factor)
*compptr->h_samp_factor/dinfo->max_h_samp_factor;
ch[i]=PAD(dinfo->output_height, dinfo->max_v_samp_factor)
ph[i]=PAD(dinfo->output_height, dinfo->max_v_samp_factor)
*compptr->v_samp_factor/dinfo->max_v_samp_factor;
if(iw[i]!=cw[i] || ih!=ch[i]) usetmpbuf=1;
if(iw[i]!=pw[i] || ih!=ph[i]) usetmpbuf=1;
th[i]=compptr->v_samp_factor*dctsize;
tmpbufsize+=iw[i]*th[i];
if((outbuf[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ch[i]))==NULL)
if((outbuf[i]=(JSAMPROW *)malloc(sizeof(JSAMPROW)*ph[i]))==NULL)
_throw("tjDecompressToYUVPlanes(): Memory allocation failure");
ptr=dstPlanes[i];
for(row=0; row<ch[i]; row++)
for(row=0; row<ph[i]; row++)
{
outbuf[i][row]=ptr;
ptr+=(strides && strides[i]>0)? strides[i]:cw[i];
ptr+=(strides && strides[i]!=0)? strides[i]:pw[i];
}
}
if(usetmpbuf)
@@ -1695,9 +1787,9 @@ DLLEXPORT int DLLCALL tjDecompressToYUVPlanes(tjhandle handle,
int j;
for(i=0; i<dinfo->num_components; i++)
{
for(j=0; j<min(th[i], ch[i]-crow[i]); j++)
for(j=0; j<min(th[i], ph[i]-crow[i]); j++)
{
memcpy(outbuf[i][crow[i]+j], tmpbuf[i][j], cw[i]);
memcpy(outbuf[i][crow[i]+j], tmpbuf[i][j], pw[i]);
}
}
}
@@ -1720,7 +1812,7 @@ DLLEXPORT int DLLCALL tjDecompressToYUV2(tjhandle handle,
int width, int pad, int height, int flags)
{
unsigned char *dstPlanes[3];
int pw, ph, cw, ch, strides[3], retval=-1, jpegSubsamp=-1;
int pw0, ph0, strides[3], retval=-1, jpegSubsamp=-1;
int i, jpegwidth, jpegheight, scaledw, scaledh;
getdinstance(handle);
@@ -1749,15 +1841,23 @@ DLLEXPORT int DLLCALL tjDecompressToYUV2(tjhandle handle,
if(scaledw>width || scaledh>height)
_throw("tjDecompressToYUV2(): Could not scale down to desired image dimensions");
pw=PAD(scaledw, tjMCUWidth[jpegSubsamp]/8);
ph=PAD(scaledh, tjMCUHeight[jpegSubsamp]/8);
cw=pw*8/tjMCUWidth[jpegSubsamp]; ch=ph*8/tjMCUHeight[jpegSubsamp];
strides[0]=PAD(pw, pad);
strides[1]=strides[2]=(jpegSubsamp==TJSAMP_GRAY? 0:PAD(cw, pad));
pw0=tjPlaneWidth(0, width, jpegSubsamp);
ph0=tjPlaneHeight(0, height, jpegSubsamp);
dstPlanes[0]=dstBuf;
dstPlanes[1]=(jpegSubsamp==TJSAMP_GRAY? NULL:dstPlanes[0]+strides[0]*ph);
dstPlanes[2]=(jpegSubsamp==TJSAMP_GRAY? NULL:dstPlanes[1]+strides[1]*ch);
strides[0]=PAD(pw0, pad);
if(jpegSubsamp==TJSAMP_GRAY)
{
strides[1]=strides[2]=0;
dstPlanes[1]=dstPlanes[2]=NULL;
}
else
{
int pw1=tjPlaneWidth(1, width, jpegSubsamp);
int ph1=tjPlaneHeight(1, height, jpegSubsamp);
strides[1]=strides[2]=PAD(pw1, pad);
dstPlanes[1]=dstPlanes[0]+strides[0]*ph0;
dstPlanes[2]=dstPlanes[1]+strides[1]*ph1;
}
this->headerRead=1;
return tjDecompressToYUVPlanes(handle, jpegBuf, jpegSize, dstPlanes, width,