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When tjDecodeYUV() is used with a "fresh" decompressor instance (one that hasn't been previously used to decompress a JPEG image), then it needs comps_in_scan, data_precision, and the quantization tables to be defined. This patch also extends TJUnitTest to check for this error.

Browse Source 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1143 632fc199-4ca6-4c93-a231-07263d6284db
This commit is contained in:
DRC
2014-03-10 09:34:04 +00:00
parent bb70930aa8
commit c33bc1dab0
2 changed files with 16 additions and 4 deletions
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10
tjunittest.c
View File

@@ -414,14 +414,17 @@ void compTest(tjhandle handle, unsigned char **dstBuf,
{
unsigned long yuvSize=tjBufSizeYUV2(w, pad, h, subsamp);
tjscalingfactor sf={1, 1};
tjhandle handle2=tjInitCompress();
if(!handle2) _throwtj();
if((yuvBuf=(unsigned char *)malloc(yuvSize))==NULL)
_throw("Memory allocation failure");
memset(yuvBuf, 0, yuvSize);
printf("%s %s -> YUV %s ... ", pfStr, buStrLong, subNameLong[subsamp]);
_tj(tjEncodeYUV3(handle, srcBuf, w, 0, h, pf, yuvBuf, pad, subsamp,
_tj(tjEncodeYUV3(handle2, srcBuf, w, 0, h, pf, yuvBuf, pad, subsamp,
flags));
tjDestroy(handle2);
snprintf(tempStr, 1024, "%s_enc_%s_%s_%s.yuv", basename, pfStr, buStr,
subName[subsamp]);
writeJPEG(yuvBuf, yuvSize, tempStr);
@@ -476,6 +479,8 @@ void _decompTest(tjhandle handle, unsigned char *jpegBuf,
{
unsigned long yuvSize=tjBufSizeYUV2(scaledWidth, pad, scaledHeight,
subsamp);
tjhandle handle2=tjInitDecompress();
if(!handle2) _throwtj();
if((yuvBuf=(unsigned char *)malloc(yuvSize))==NULL)
_throw("Memory allocation failure");
@@ -493,8 +498,9 @@ void _decompTest(tjhandle handle, unsigned char *jpegBuf,
printf("YUV %s -> %s %s ... ", subNameLong[subsamp], pixFormatStr[pf],
(flags&TJFLAG_BOTTOMUP)? "Bottom-Up":"Top-Down ");
_tj(tjDecodeYUV(handle, yuvBuf, pad, subsamp, dstBuf, scaledWidth, 0,
_tj(tjDecodeYUV(handle2, yuvBuf, pad, subsamp, dstBuf, scaledWidth, 0,
scaledHeight, pf, flags));
tjDestroy(handle2);
}
else
{

10
turbojpeg.c
View File

@@ -1242,12 +1242,12 @@ static int setDecodeDefaults(struct jpeg_decompress_struct *dinfo,
if(subsamp==TJSAMP_GRAY)
{
dinfo->num_components=1;
dinfo->num_components=dinfo->comps_in_scan=1;
dinfo->jpeg_color_space=JCS_GRAYSCALE;
}
else
{
dinfo->num_components=3;
dinfo->num_components=dinfo->comps_in_scan=3;
dinfo->jpeg_color_space=JCS_YCbCr;
}
@@ -1265,6 +1265,12 @@ static int setDecodeDefaults(struct jpeg_decompress_struct *dinfo,
(i==0)? 0:1;
dinfo->cur_comp_info[i]=compptr;
}
dinfo->data_precision=8;
for(i=0; i<2; i++)
{
if(dinfo->quant_tbl_ptrs[i]==NULL)
dinfo->quant_tbl_ptrs[i]=jpeg_alloc_quant_table((j_common_ptr)dinfo);
}
return 0;
}