160 lines
4.5 KiB
C
160 lines
4.5 KiB
C
/*------------------------------------------------------------------------------
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-- --
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-- This software is confidential and proprietary and may be used --
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-- only as expressly authorized by a licensing agreement from --
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-- --
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-- Hantro Products Oy. --
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-- --
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-- (C) COPYRIGHT 2006 HANTRO PRODUCTS OY --
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-- ALL RIGHTS RESERVED --
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-- --
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-- The entire notice above must be reproduced --
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-- on all copies and should not be removed. --
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-- --
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--------------------------------------------------------------------------------
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--
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-- Abstract : Header file for stream decoding utilities
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--
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--------------------------------------------------------------------------------
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--
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-- Version control information, please leave untouched.
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--
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-- $RCSfile: rv_utils.h,v $
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-- $Date: 2009/03/11 14:00:12 $
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-- $Revision: 1.1 $
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--
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------------------------------------------------------------------------------*/
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#ifndef RV_UTILS_H
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#define RV_UTILS_H
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/*------------------------------------------------------------------------------
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1. Include headers
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------------------------------------------------------------------------------*/
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#include "rv_container.h"
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#ifdef _ASSERT_USED
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#include <assert.h>
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#endif
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#ifdef _UTEST
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#include <stdio.h>
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#endif
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/*------------------------------------------------------------------------------
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2. Module defines
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------------------------------------------------------------------------------*/
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/* constant definitions */
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#ifndef OK
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#define OK 0
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#endif
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#ifndef NOK
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#define NOK 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef NULL
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#define NULL 0
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#endif
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/* decoder states */
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enum
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{
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STATE_OK,
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STATE_NOT_READY,
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STATE_SYNC_LOST
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};
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#define HANTRO_OK 0
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#define HANTRO_NOK 1
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#ifndef NULL
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#define NULL 0
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#endif
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/* Error concealment */
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#define FREEZED_PIC_RDY 1
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enum
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{
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RV_I_PIC = 0,
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RV_FI_PIC = 1,
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RV_P_PIC = 2,
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RV_B_PIC = 3
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};
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enum
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{
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RV_SLICE
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};
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/* value to be returned by GetBits if stream buffer is empty */
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#define END_OF_STREAM 0xFFFFFFFFU
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/* macro for debug printing. Note that double parenthesis has to be used, i.e.
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* DEBUG(("Debug printing %d\n",%d)) */
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#ifdef _UTEST
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#define DEBUG(args) printf args
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#else
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#define DEBUG(args)
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#endif
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/* macro for assertion, used only if compiler flag _ASSERT_USED is defined */
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#ifdef _ASSERT_USED
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#define ASSERT(expr) assert(expr)
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#else
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#define ASSERT(expr)
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#endif
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/* macro to check if stream ends */
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#define IS_END_OF_STREAM(pContainer) \
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( (pContainer)->StrmDesc.strmBuffReadBits == \
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(8*(pContainer)->StrmDesc.strmBuffSize) )
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/* macro to saturate value to range [min,max]. Note that for unsigned value
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* both min and max should be positive, otherwise result will be wrong due to
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* arithmetic conversion. If min > max -> value will be equal to min. */
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#define SATURATE(min,value,max) \
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if ((value) < (min)) (value) = (min); \
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else if ((value) > (max)) (value) = (max);
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#define ABS(val) (((val) < 0) ? -(val) : (val))
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/*------------------------------------------------------------------------------
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3. Data types
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------------------------------------------------------------------------------*/
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typedef struct
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{
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u8 *pStrmBuffStart; /* pointer to start of stream buffer */
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u8 *pStrmCurrPos; /* current read address in stream buffer */
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u32 bitPosInWord; /* bit position in stream buffer byte */
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u32 strmBuffSize; /* size of stream buffer (bytes) */
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u32 strmBuffReadBits; /* number of bits read from stream buffer */
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} strmData_t;
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/*------------------------------------------------------------------------------
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4. Function prototypes
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------------------------------------------------------------------------------*/
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u32 rv_GetBits(DecContainer *, u32 numBits);
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u32 rv_ShowBits(DecContainer *, u32 numBits);
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u32 rv_ShowBits32(DecContainer *);
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u32 rv_FlushBits(DecContainer *, u32 numBits);
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u32 rv_CheckStuffing(DecContainer *);
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u32 rv_NumBits(u32 value);
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#endif /* RV_UTILS_H */
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