本文整理汇总了C++中dng_stream::Length方法的典型用法代码示例。如果您正苦于以下问题：C++ dng_stream::Length方法的具体用法？C++ dng_stream::Length怎么用？C++ dng_stream::Length使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类dng_stream的用法示例。
在下文中一共展示了dng_stream::Length方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: DuplicateStream
void dng_stream::DuplicateStream (dng_stream &dstStream)
{
// Turn off sniffers for this operation.
TempStreamSniffer noSniffer1 (*this , NULL);
TempStreamSniffer noSniffer2 (dstStream, NULL);
// First grow the destination stream if required, in an attempt to
// reserve any needed space before overwriting the existing data.
if (dstStream.Length () < Length ())
{
dstStream.SetLength (Length ());
}
SetReadPosition (0);
dstStream.SetWritePosition (0);
CopyToStream (dstStream, Length ());
dstStream.Flush ();
dstStream.SetLength (Length ());
}示例2: ValidateIFD
bool dng_info::ValidateIFD (dng_stream &stream,
uint64 ifdOffset,
int64 offsetDelta)
{
// Make sure we have a count.
if (ifdOffset + 2 > stream.Length ())
{
return false;
}
// Get entry count.
stream.SetReadPosition (ifdOffset);
uint32 ifdEntries = stream.Get_uint16 ();
if (ifdEntries < 1)
{
return false;
}
// Make sure we have room for all entries and next IFD link.
if (ifdOffset + 2 + ifdEntries * 12 + 4 > stream.Length ())
{
return false;
}
// Check each entry.
for (uint32 tag_index = 0; tag_index < ifdEntries; tag_index++)
{
stream.SetReadPosition (ifdOffset + 2 + tag_index * 12);
stream.Skip (2); // Ignore tag code.
uint32 tagType = stream.Get_uint16 ();
uint32 tagCount = stream.Get_uint32 ();
uint32 tag_type_size = TagTypeSize (tagType);
if (tag_type_size == 0)
{
return false;
}
uint32 tag_data_size = tagCount * tag_type_size;
if (tag_data_size > 4)
{
uint64 tagOffset = stream.Get_uint32 ();
tagOffset += offsetDelta;
if (tagOffset + tag_data_size > stream.Length ())
{
return false;
}
}
}
return true;
}示例3: ParseTag
//.........这里部分代码省略.........
case 8224:
olympusMakerParent = tcOlympusMakerNote8224;
break;
case 8240:
olympusMakerParent = tcOlympusMakerNote8240;
break;
case 8256:
olympusMakerParent = tcOlympusMakerNote8256;
break;
case 8272:
olympusMakerParent = tcOlympusMakerNote8272;
break;
case 12288:
olympusMakerParent = tcOlympusMakerNote12288;
break;
default:
break;
}
if (olympusMakerParent)
{
// Olympus made a mistake in some camera models in computing
// the size of these sub-tags, so we fudge the count.
if (ParseMakerNoteIFD (host,
stream,
stream.Length () - tagOffset,
tagOffset,
offsetDelta,
tagOffset,
stream.Length (),
olympusMakerParent))
{
return;
}
}
}
if (parentCode == tcRicohMakerNote &&
tagCode == 0x2001 &&
tagType == ttUndefined &&
tagCount > 22)
{
char header [20];
stream.SetReadPosition (tagOffset);
stream.Get (header, sizeof (header));
if (memcmp (header, "[Ricoh Camera Info]", 19) == 0)
{
ParseMakerNoteIFD (host,
stream,示例4: Parse
//.........这里部分代码省略.........
#endif
ValidateMagic ();
// Parse IFD 0.
uint64 next_offset = stream.Get_uint32 ();
fExif.Reset (host.Make_dng_exif ());
fShared.Reset (host.Make_dng_shared ());
fIFD [0].Reset (host.Make_dng_ifd ());
ParseIFD (host,
stream,
fExif.Get (),
fShared.Get (),
fIFD [0].Get (),
fTIFFBlockOffset + next_offset,
fTIFFBlockOffset,
0);
next_offset = fIFD [0]->fNextIFD;
fIFDCount = 1;
// Parse chained IFDs.
while (next_offset)
{
if (next_offset >= stream.Length ())
{
#if qDNGValidate
{
ReportWarning ("Chained IFD offset past end of stream");
}
#endif
break;
}
// Some TIFF file writers forget about the next IFD offset, so
// validate the IFD at that offset before parsing it.
if (!ValidateIFD (stream,
fTIFFBlockOffset + next_offset,
fTIFFBlockOffset))
{
#if qDNGValidate
{
ReportWarning ("Chained IFD is not valid");
}