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git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1010 632fc199-4ca6-4c93-a231-07263d6284db
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DRC
2013-08-18 09:28:09 +00:00
parent ec61f52d87
commit c25257c4ea
11 changed files with 24 additions and 25 deletions
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23
turbojpeg.h
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@@ -85,8 +85,7 @@ enum TJSAMP
/**
* 4:4:0 chrominance subsampling. The JPEG or YUV image will contain one
* chrominance component for every 1x2 block of pixels in the source image.
* Note that 4:4:0 subsampling is not fully accelerated in the libjpeg-turbo
* implementation of TurboJPEG.
* Note that 4:4:0 subsampling is not fully accelerated in libjpeg-turbo.
*/
TJSAMP_440
};
@@ -265,20 +264,20 @@ static const int tjPixelSize[TJ_NUMPF] = {3, 3, 4, 4, 4, 4, 1, 4, 4, 4, 4};
#define TJFLAG_NOREALLOC 1024
/**
* Use the fastest DCT/IDCT algorithm available in the underlying codec. The
* default if this flag is not specified is implementation-specific. The
* libjpeg implementation, for example, uses the fast algorithm by default when
* compressing, because this has been shown to have only a very slight effect
* on accuracy, but it uses the accurate algorithm when decompressing, because
* this has been shown to have a larger effect.
* default if this flag is not specified is implementation-specific. For
* example, the implementation of TurboJPEG for libjpeg[-turbo] uses the fast
* algorithm by default when compressing, because this has been shown to have
* only a very slight effect on accuracy, but it uses the accurate algorithm
* when decompressing, because this has been shown to have a larger effect.
*/
#define TJFLAG_FASTDCT 2048
/**
* Use the most accurate DCT/IDCT algorithm available in the underlying codec.
* The default if this flag is not specified is implementation-specific. The
* libjpeg implementation, for example, uses the fast algorithm by default when
* compressing, because this has been shown to have only a very slight effect
* on accuracy, but it uses the accurate algorithm when decompressing, because
* this has been shown to have a larger effect.
* The default if this flag is not specified is implementation-specific. For
* example, the implementation of TurboJPEG for libjpeg[-turbo] uses the fast
* algorithm by default when compressing, because this has been shown to have
* only a very slight effect on accuracy, but it uses the accurate algorithm
* when decompressing, because this has been shown to have a larger effect.
*/
#define TJFLAG_ACCURATEDCT 4096