armacaac.h

The OpenMAX DL (Development Layer) APIs contain a comprehensive set of audio, video, signal processi

/**
 * 
 * File Name:  armACAAC.h
 * OpenMAX DL: v1.0.2
 * Revision:   10586
 * Date:       Wednesday, March 5, 2008
 * 
 * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved.
 * 
 * 
 *   
 * File: armACAAC.h
 * 
 * Declares C functions used in the sample implementation of OpenMAX Audio domain
 *
 */
 
  
#ifndef _armACAAC_H_
#define _armACAAC_H_

#include "omxAC.h"
#include "armCOMM.h"

/**
 * Function: armACAAC_TnsDecodeCoef
 *
 * Description:
 * Inverse Quantization and conversion to LPC coefficients
 *
 * Parameters:
 * [in]  pTnsFiltCoef pointer to TNS filter coefficients
 * [in]  coeffRes     TNS coef resolution bits
 * [in]  tnsOrder     TNS filter order
 * [out] pLpCoeff     pointer to the LPC coefficients
 *
 * Return Value:
 * Standard OMXResult result. See enumeration for possible result codes.
 *
 */
OMXResult armACAAC_TnsDecodeCoef(
    const OMX_S8 *pTnsFiltCoef,
    OMX_F64 *pLpCoeff,
    OMX_INT coeffRes,
    OMX_INT tnsOrder
);


/**
 * Function: armACAAC_TnsFilter
 *
 * Description:
 * TNS filter for analysis/synthesis
 *
 * Parameters:
 * [in]  pSpectralCoeff pointer to the spectral coefficients to do encode TNS
 *                                             	represented in Q13.18 format.  
 * [in]  pLpCoeff       pointer to the LPC coefficients
 * [in]  size           size of filtering
 * [in]  tnsOrder       TNS filter order
 * [in]  increment      indicating direction of filtering
 * [in]  flag           Indicating Encode/Decode 1: Encode 0: Decode
 * [out] pSpectralCoeff pointer to the spectral coefficients have done encode TNS
 *												represented in Q13.18 format.  
 *
 */
OMXVoid   armACAAC_TnsFilter(
    OMX_S32 *pSpectralCoeff,
    OMX_F64 *pLpCoeff,
    OMX_INT size,
    OMX_INT increment, 
    OMX_INT tnsOrder,
    OMX_INT flag
);

/**
 * Function: armACAAC_DecodeLtpData
 *
 * Description:
 * Parses the LTP information from the bit stream.
 *
 * Parameters:
 * [in/out]  ppBitStream  pointer to the pointer to the current byte
 * [in/out]  pOffset	  pointer to the bit position in the byte pointed
 *                         by *ppBitStream. Valid within 0 to 7. 0: MSB of
 *                         the byte, 7: LSB of the byte.
 * [in]  winSequence      window type, short or long
 * [in]  maxSfb           number of scale factor band
 * [out] pAACLtpInfo      pointer to the LTP information
 *
 */

OMXVoid armACAAC_DecodeLtpData(
                          const OMX_U8 **ppBitStream,
                          OMX_INT *pOffset,
                          OMX_INT winSequence,
                          OMX_INT maxSfb,
                          OMXAACLtpInfo *pLtpInfo
);


/**
 * Function: armACAAC_DecodeIcsInfoData
 *
 * Description:
 * Parses ICS information from the bit stream.
 *
 * Parameters:
 * [in/out]  ppBitStream  pointer to the pointer to the current byte
 * [in/out]  pOffset	  pointer to the bit position in the byte pointed
 *                         by *ppBitStream. Valid within 0 to 7. 0: MSB of
 *                         the byte, 7: LSB of the byte.
 * [in]  commonWin         1/0:Infomation shared/ notshared for two channels
 * [in]  audioObjectType   audio object type indication. 1:main, 2:LC, 4: LTP 
 * [in]  predSfbMax         maximum prediction scalefactor bands. For LC profile, set predSfbMax = 0
 *                                for there is no predictors.
 * [out] pChanInfo     pointer to the channel information structure
 *                          used as output only if != NULL
 * [out] pIcsInfo     pointer to the ICS information structure
 * [out] pLtpInfo          pointer to the array of pointers to the LTP information structures
 *
 */
 
OMXResult armACAAC_DecodeIcsInfoData(
                                const OMX_U8 **ppBitStream,
                                OMX_INT *pOffset,
                                OMX_INT commonWin,
                                OMX_INT audioObjectType,
                                OMX_INT predSfbMax,
                                OMXAACChanInfo *pChanInfo,
                                OMXAACIcsInfo *pIcsInfo,
                                OMXAACLtpInfoPtr *pLtpInfo
);



#endif /*_armACAAC_H_*/

/*End of file*/