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https://github.com/SatDump/SatDump
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107 lines
2.7 KiB
C++
107 lines
2.7 KiB
C++
/*
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* Copyright 2011-2019, European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT)
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef Compress_included
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#define Compress_included
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/*******************************************************************************
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TYPE:
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Template Class.
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PURPOSE:
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Provides an abstract base class for a compression algorithm.
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FUNCTION:
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Provides an abstract base class for a compression algorithm.
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INTERFACES:
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See 'INTERFACES:' in the module declaration below.
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RESOURCES:
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None.
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REFERENCES:
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None.
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PROCESSING:
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None.
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For passing image data to and from the routines, Util::CDataField... objects are
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used.
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DATA:
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See 'DATA:' in the class header below.
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LOGIC:
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-
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*******************************************************************************/
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#include <string>
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#include "CDataField.h" // Util
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#include "SmartPtr.h" // Util
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namespace COMP
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{
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// Enumeration of the requantization modes.
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enum ERequantizationMode
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{
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e_NoRequantization = 0,
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e_10to12 = 1, // 10bpp to 12bpp padding
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e_10to8_floor = 2, // 10bpp to 8bpp conversion by floor(x ).
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e_10to8_floor1 = 3, // 10bpp to 8bpp conversion by floor(x+1).
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e_10to8_round = 4, // 10bpp to 8bpp conversion by rounding (floor(x+2)).
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e_10to8_ceil = 5 // 10bpp to 8bpp conversion by ceiling (floor(x+3)).
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};
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// Abstract base class.
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class CCompress
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{
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public:
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// INTERFACES:
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// Description: Destructor.
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// Returns: Nothing.
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virtual ~CCompress()
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{
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}
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// Description: Compresses the input image data according to
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// the specified parameters.
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// Returns: Compressed data field.
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virtual Util::CDataFieldCompressedImage Compress(
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const Util::CDataFieldUncompressedImage &i_Image // Image to compress.
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)
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const = 0;
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// Description: Tells whether compression is lossless or lossy.
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// Returns: true : Compression is lossless.
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// false: Compression is lossy.
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virtual bool IsLossless()
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const = 0;
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// Description: Returns the set of compression parameters in string form.
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// Returns: Compression parameters in readable form.
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virtual std::string GetTraceString()
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const = 0;
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};
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} // end namespace
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#endif
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