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64 lines
2.0 KiB
64 lines
2.0 KiB
/*
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* mcu.h --
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*
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* Copyright (C) 1991, 1992, Thomas G. Lane.
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* Part of the Independent JPEG Group's software.
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* See the file Copyright for more details.
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*
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* Copyright (c) 1993 Brian C. Smith, The Regents of the University
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* of California
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* All rights reserved.
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*
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* Copyright (c) 1994 Kongji Huang and Brian C. Smith.
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* Cornell University
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* All rights reserved.
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*
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* Permission to use, copy, modify, and distribute this software and its
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* documentation for any purpose, without fee, and without written agreement is
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* hereby granted, provided that the above copyright notice and the following
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* two paragraphs appear in all copies of this software.
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*
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* IN NO EVENT SHALL CORNELL UNIVERSITY BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
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* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF CORNELL
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* UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* CORNELL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND CORNELL UNIVERSITY HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*/
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#ifndef _MCU
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#define _MCU
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/*
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* An MCU (minimum coding unit) is an array of samples.
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*/
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typedef short ComponentType; /* the type of image components */
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typedef ComponentType *MCU; /* MCU - array of samples */
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extern MCU *mcuTable; /* the global mcu table that buffers the source image */
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extern int numMCU; /* number of MCUs in mcuTable */
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extern MCU *mcuROW1,*mcuROW2; /* pt to two rows of MCU in encoding & decoding */
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/*
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*--------------------------------------------------------------
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*
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* MakeMCU --
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*
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* MakeMCU returns an MCU for input parsing.
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*
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* Results:
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* A new MCU
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*
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* Side effects:
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* None.
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*
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*--------------------------------------------------------------
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*/
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#define MakeMCU(dcPtr) (mcuTable[numMCU++])
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#endif /* _MCU */
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