PandA-2024.02
examples
CHStone
CHStone
motion
getvlc.c
Go to the documentation of this file.
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/*
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+--------------------------------------------------------------------------+
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| CHStone : a suite of benchmark programs for C-based High-Level Synthesis |
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| ======================================================================== |
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| |
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| * Collected and Modified : Y. Hara, H. Tomiyama, S. Honda, |
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| H. Takada and K. Ishii |
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| Nagoya University, Japan |
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| |
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| * Remark : |
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| 1. This source code is modified to unify the formats of the benchmark |
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| programs in CHStone. |
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| 2. Test vectors are added for CHStone. |
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| 3. If "main_result" is 0 at the end of the program, the program is |
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| correctly executed. |
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| 4. Please follow the copyright of each benchmark program. |
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+--------------------------------------------------------------------------+
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*/
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/* getvlc.c, variable length decoding */
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/* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
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/*
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* Disclaimer of Warranty
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*
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* These software programs are available to the user without any license fee or
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* royalty on an "as is" basis. The MPEG Software Simulation Group disclaims
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* any and all warranties, whether express, implied, or statuary, including any
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* implied warranties or merchantability or of fitness for a particular
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* purpose. In no event shall the copyright-holder be liable for any
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* incidental, punitive, or consequential damages of any kind whatsoever
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* arising from the use of these programs.
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*
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* This disclaimer of warranty extends to the user of these programs and user's
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* customers, employees, agents, transferees, successors, and assigns.
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*
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* The MPEG Software Simulation Group does not represent or warrant that the
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* programs furnished hereunder are free of infringement of any third-party
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* patents.
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*
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* Commercial implementations of MPEG-1 and MPEG-2 video, including shareware,
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* are subject to royalty fees to patent holders. Many of these patents are
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* general enough such that they are unavoidable regardless of implementation
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* design.
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*
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*/
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int
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Get_motion_code
()
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{
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int
code;
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if
(
Get_Bits1
())
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{
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return
0;
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}
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if
((code =
Show_Bits
(9)) >= 64)
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{
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code >>= 6;
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Flush_Buffer
(
MVtab0
[code][1]);
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return
Get_Bits1
()? -
MVtab0
[code][0] :
MVtab0
[code][0];
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}
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if
(code >= 24)
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{
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code >>= 3;
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Flush_Buffer
(
MVtab1
[code][1]);
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return
Get_Bits1
()? -
MVtab1
[code][0] :
MVtab1
[code][0];
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}
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if
((code -= 12) < 0)
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return
0;
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Flush_Buffer
(
MVtab2
[code][1]);
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return
Get_Bits1
()? -
MVtab2
[code][0] :
MVtab2
[code][0];
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}
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/* get differential motion vector (for dual prime prediction) */
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int
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Get_dmvector
()
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{
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if
(
Get_Bits
(1))
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{
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return
Get_Bits
(1) ? -1 : 1;
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}
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else
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{
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return
0;
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}
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}
Flush_Buffer
void Flush_Buffer(int N)
Definition:
getbits.c:136
Get_motion_code
int Get_motion_code()
Definition:
getvlc.c:49
Get_Bits
unsigned int Get_Bits(int N)
Definition:
getbits.c:190
MVtab0
const char MVtab0[8][2]
Definition:
getvlc.h:58
Show_Bits
unsigned int Show_Bits(int N)
Definition:
getbits.c:117
Get_dmvector
int Get_dmvector()
Definition:
getvlc.c:83
Get_Bits1
unsigned int Get_Bits1()
Definition:
getbits.c:127
MVtab2
const char MVtab2[12][2]
Definition:
getvlc.h:70
MVtab1
const char MVtab1[8][2]
Definition:
getvlc.h:64
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