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AVIR
High-quality pro image resizing library
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AVIR
High-quality pro image resizing library
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#include <avir.h>
Classes | |
| struct | CResizePos |
| class | CRPosBuf |
| class | CRPosBufArray |
Public Attributes | |
| double | DCGain |
| int | EdgePixelCount |
| CBuffer< fptype > | Flt |
| CDSPFracFilterBankLin< fptype > * | FltBank |
| int | FltLatency |
| CFltBuffer | FltOrig |
| int | InBuf |
| int | InElIncr |
| int | InLen |
| int | InPrefix |
| int | InSuffix |
| bool | IsUpsample |
| int | OutBuf |
| int | OutElIncr |
| int | OutLen |
| int | OutPrefix |
| int | OutSuffix |
| CBuffer< fptype > | PrefixDC |
| int | ResampleFactor |
| CRPosBuf * | RPosBuf |
| CBuffer< fptype > | SuffixDC |
| const CImageResizerVars * | Vars |
Static Public Attributes | |
| static const int | EdgePixelCountDef = 3 |
Image resizer's filtering step class.
Class defines data to perform a single filtering step over a whole horizontal or vertical scanline. Resizing consists of 1 or more steps that may be performed before the actual resizing takes place. Filtering may also follow a resizing step. Each step must ensure that scanline data contains enough pixels to perform the next step (which may be resizing) without exceeding scanline's bounds.
A derived class must implement several "const" and "static" functions that are used to perform the actual filtering in interleaved or de-interleaved mode.
| fptype | Floating point type to use for storing pixel elements. SIMD types can be used: in this case each element may hold a whole pixel. |
| fptypeatom | The atomic type the "fptype" consists of. |
| double avir::CImageResizerFilterStep< fptype, fptypeatom >::DCGain |
DC gain which was applied to the filter. Not defined if ResampleFactor = 0.
| int avir::CImageResizerFilterStep< fptype, fptypeatom >::EdgePixelCount |
The number of edge pixels added. Affects the initial position within the input scanline, used to produce edge pixels. This variable is used and should be defined when IsUpsample=false and ResampleFactor>0. When assigning this variable it is also necessary to update InPrefix, OutLen and Vars.o variables.
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The default number of pixels additionally produced at scanline edges during filtering. This is required to reduce edge artifacts.
| CBuffer< fptype > avir::CImageResizerFilterStep< fptype, fptypeatom >::Flt |
Filter to use at this step.
| CDSPFracFilterBankLin< fptype >* avir::CImageResizerFilterStep< fptype, fptypeatom >::FltBank |
Filter bank in use by *this resizing step.
| int avir::CImageResizerFilterStep< fptype, fptypeatom >::FltLatency |
Filter's latency (group delay, shift) in pixels.
| CFltBuffer avir::CImageResizerFilterStep< fptype, fptypeatom >::FltOrig |
Originally-designed filter. This buffer may not be assigned. Assigned by filters that precede the resizing step if such filter is planned to be embedded into the interpolation filter as "external" filter. If IsUpsample=true and this filter buffer is not empty, the upsampling step will not itself apply any filtering over upsampled input scanline.
| int avir::CImageResizerFilterStep< fptype, fptypeatom >::InBuf |
Input buffer index, 0 or 1.
| int avir::CImageResizerFilterStep< fptype, fptypeatom >::InElIncr |
Pixel element increment within the input buffer, used during de-interleaved processing: in this case each image's channel is stored independently, InElIncr elements apart.
| int avir::CImageResizerFilterStep< fptype, fptypeatom >::InLen |
Input scanline's length in pixels.
| int avir::CImageResizerFilterStep< fptype, fptypeatom >::InPrefix |
Required input prefix pixels. These prefix pixels will be filled with source scanline's first pixel value. If IsUpsample is "true", this is the additional number of times the first pixel will be filtered before processing scanline, this number is also reflected in the OutPrefix.
| int avir::CImageResizerFilterStep< fptype, fptypeatom >::InSuffix |
Required input suffix pixels. These suffix pixels will be filled with source scanline's last pixel value. If IsUpsample is "true", this is the additional number of times the last pixel will be filtered before processing scanline, this number is also reflected in the OutSuffix.
| bool avir::CImageResizerFilterStep< fptype, fptypeatom >::IsUpsample |
"True" if this step is an upsampling step, "false" if downsampling step. Should be set to "false" if ResampleFactor equals 0.
| int avir::CImageResizerFilterStep< fptype, fptypeatom >::OutBuf |
Output buffer index. 0 or 1; 2 for the last step.
| int avir::CImageResizerFilterStep< fptype, fptypeatom >::OutElIncr |
Pixel element increment within the output buffer, used during de-interleaved processing. Equals to the InBufElIncr of the next step.
| int avir::CImageResizerFilterStep< fptype, fptypeatom >::OutLen |
Length of the resulting scanline.
| int avir::CImageResizerFilterStep< fptype, fptypeatom >::OutPrefix |
Required output prefix pixels. These prefix pixels will not be pre-filled with any values. Value is valid only if IsUpsample equals "true".
| int avir::CImageResizerFilterStep< fptype, fptypeatom >::OutSuffix |
Required input suffix pixels. These suffix pixels will not be pre-filled with any values. Value is valid only if IsUpsample equals "true".
| CBuffer< fptype > avir::CImageResizerFilterStep< fptype, fptypeatom >::PrefixDC |
DC component fluctuations added at the start of the resulting scanline, used when IsUpsample equals "true".
| int avir::CImageResizerFilterStep< fptype, fptypeatom >::ResampleFactor |
Resample factor (>=1). If 0, this is a resizing step. This value should be >1 if IsUpsample equals "true".
| CRPosBuf* avir::CImageResizerFilterStep< fptype, fptypeatom >::RPosBuf |
Resizing positions buffer. Used when ResampleFactor equals 0 (resizing step).
| CBuffer< fptype > avir::CImageResizerFilterStep< fptype, fptypeatom >::SuffixDC |
DC component fluctuations added at the end of the resulting scanline, used when IsUpsample equals "true".
| const CImageResizerVars* avir::CImageResizerFilterStep< fptype, fptypeatom >::Vars |
Image resizing-related variables.
1.8.6
