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Viewing changes to src/pkg/image/ycbcr.go

  • Committer: Package Import Robot
  • Author(s): James Page
  • Date: 2013-08-20 14:06:23 UTC
  • mfrom: (14.1.23 saucy-proposed)
  • Revision ID: package-import@ubuntu.com-20130820140623-b414jfxi3m0qkmrq
Tags: 2:1.1.2-2ubuntu1
https://launchpad.net/bugs/1211749
https://launchpad.net/bugs/1202027
* Merge from Debian unstable (LP: #1211749, #1202027). Remaining changes:
  - 016-armhf-elf-header.patch: Use correct ELF header for armhf binaries.
  - d/control,control.cross: Update Breaks/Replaces for Ubuntu
    versions to ensure smooth upgrades, regenerate control file.

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Lines of Context:
src/pkg/image/ycbcr.go
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        YCbCrSubsampleRatio444 YCbCrSubsampleRatio = iota
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        YCbCrSubsampleRatio422
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        YCbCrSubsampleRatio420
 
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        YCbCrSubsampleRatio440
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)
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func (s YCbCrSubsampleRatio) String() string {
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                return "YCbCrSubsampleRatio422"
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        case YCbCrSubsampleRatio420:
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                return "YCbCrSubsampleRatio420"
 
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        case YCbCrSubsampleRatio440:
 
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                return "YCbCrSubsampleRatio440"
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        }
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        return "YCbCrSubsampleRatioUnknown"
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}
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//      For 4:4:4, CStride == YStride/1 && len(Cb) == len(Cr) == len(Y)/1.
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//      For 4:2:2, CStride == YStride/2 && len(Cb) == len(Cr) == len(Y)/2.
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//      For 4:2:0, CStride == YStride/2 && len(Cb) == len(Cr) == len(Y)/4.
 
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//      For 4:4:0, CStride == YStride/1 && len(Cb) == len(Cr) == len(Y)/2.
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type YCbCr struct {
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        Y, Cb, Cr      []uint8
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        YStride        int
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                return (y-p.Rect.Min.Y)*p.CStride + (x/2 - p.Rect.Min.X/2)
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        case YCbCrSubsampleRatio420:
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                return (y/2-p.Rect.Min.Y/2)*p.CStride + (x/2 - p.Rect.Min.X/2)
 
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        case YCbCrSubsampleRatio440:
 
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                return (y/2-p.Rect.Min.Y/2)*p.CStride + (x - p.Rect.Min.X)
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        }
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        // Default to 4:4:4 subsampling.
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        return (y-p.Rect.Min.Y)*p.CStride + (x - p.Rect.Min.X)
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        case YCbCrSubsampleRatio420:
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                cw = (r.Max.X+1)/2 - r.Min.X/2
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                ch = (r.Max.Y+1)/2 - r.Min.Y/2
 
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        case YCbCrSubsampleRatio440:
 
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                cw = w
 
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                ch = (r.Max.Y+1)/2 - r.Min.Y/2
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        default:
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                // Default to 4:4:4 subsampling.
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                cw = w