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/*************************** Fraunhofer IIS FDK Tools **********************
(C) Copyright Fraunhofer IIS (2011)
All Rights Reserved
Please be advised that this software and/or program delivery is
Confidential Information of Fraunhofer and subject to and covered by the
Fraunhofer IIS Software Evaluation Agreement
between Google Inc. and Fraunhofer
effective and in full force since March 1, 2012.
You may use this software and/or program only under the terms and
conditions described in the above mentioned Fraunhofer IIS Software
Evaluation Agreement. Any other and/or further use requires a separate agreement.
$Id$
Author(s): Markus Lohwasser
Description: FDK Tools Hybrid Filterbank
This software and/or program is protected by copyright law and international
treaties. Any reproduction or distribution of this software and/or program,
or any portion of it, may result in severe civil and criminal penalties, and
will be prosecuted to the maximum extent possible under law.
******************************************************************************/
#ifndef __FDK_HYBRID_H
#define __FDK_HYBRID_H
#include "common_fix.h"
/*--------------- enums -------------------------------*/
/**
* Hybrid Filterband modes.
*/
typedef enum {
THREE_TO_TEN,
THREE_TO_TWELVE,
THREE_TO_SIXTEEN
} FDK_HYBRID_MODE;
/*--------------- structure definitions ---------------*/
typedef struct FDK_HYBRID_SETUP *HANDLE_FDK_HYBRID_SETUP;
typedef struct
{
FIXP_DBL *bufferLFReal[3]; /*!< LF real filter states. */
FIXP_DBL *bufferLFImag[3]; /*!< LF imag filter states. */
FIXP_DBL *bufferHFReal[13]; /*!< HF real delay lines. */
FIXP_DBL *bufferHFImag[13]; /*!< HF imag delay lines. */
INT bufferLFpos; /*!< Position to write incoming data into ringbuffer. */
INT bufferHFpos; /*!< Delay line positioning. */
INT nrBands; /*!< Number of QMF bands. */
INT cplxBands; /*!< Number of complex QMF bands.*/
UCHAR hfMode; /*!< Flag signalizes treatment of HF bands. */
FIXP_DBL *pLFmemory; /*!< Pointer to LF states buffer. */
FIXP_DBL *pHFmemory; /*!< Pointer to HF states buffer. */
UINT LFmemorySize; /*!< Size of LF states buffer. */
UINT HFmemorySize; /*!< Size of HF states buffer. */
HANDLE_FDK_HYBRID_SETUP pSetup; /*!< Pointer to filter setup. */
} FDK_ANA_HYB_FILTER;
typedef struct
{
INT nrBands; /*!< Number of QMF bands. */
INT cplxBands; /*!< Number of complex QMF bands.*/
HANDLE_FDK_HYBRID_SETUP pSetup; /*!< Pointer to filter setup. */
} FDK_SYN_HYB_FILTER;
typedef FDK_ANA_HYB_FILTER *HANDLE_FDK_ANA_HYB_FILTER;
typedef FDK_SYN_HYB_FILTER *HANDLE_FDK_SYN_HYB_FILTER;
/**
* \brief Create one instance of Hybrid Analyis Filterbank.
*
* \param hAnalysisHybFilter Pointer to an outlying allocated Hybrid Analysis Filterbank structure.
* \param pLFmemory Pointer to outlying buffer used LF filtering.
* \param LFmemorySize Size of pLFmemory in bytes.
* \param pHFmemory Pointer to outlying buffer used HF delay line.
* \param HFmemorySize Size of pLFmemory in bytes.
*
* \return 0 on success.
*/
INT FDKhybridAnalysisOpen(
HANDLE_FDK_ANA_HYB_FILTER hAnalysisHybFilter,
FIXP_DBL *const pLFmemory,
const UINT LFmemorySize,
FIXP_DBL *const pHFmemory,
const UINT HFmemorySize
);
/**
* \brief Initialize and configure Hybrdid Analysis Filterbank instance.
*
* \param hAnalysisHybFilter A Hybrid Analysis Filterbank handle.
* \param mode Select hybrid filter configuration.
* \param qmfBands Number of qmf bands to be processed.
* \param cplxBands Number of complex qmf bands to be processed.
* \param initStatesFlag Indicates whether the states buffer has to be cleared.
*
* \return 0 on success.
*/
INT FDKhybridAnalysisInit(
HANDLE_FDK_ANA_HYB_FILTER hAnalysisHybFilter,
const FDK_HYBRID_MODE mode,
const INT qmfBands,
const INT cplxBands,
const INT initStatesFlag
);
/**
* \brief Adjust Hybrdid Analysis Filterbank states.
*
* \param hAnalysisHybFilter A Hybrid Analysis Filterbank handle.
* \param scalingValue Scaling value to be applied on filter states.
*
* \return 0 on success.
*/
INT FDKhybridAnalysisScaleStates(
HANDLE_FDK_ANA_HYB_FILTER hAnalysisHybFilter,
const INT scalingValue
);
/**
* \brief Apply Hybrid Analysis Filterbank on Qmf input data.
*
* \param hAnalysisHybFilter A Hybrid Analysis Filterbank handle.
* \param pQmfReal Qmf input data.
* \param pQmfImag Qmf input data.
* \param pHybridReal Hybrid output data.
* \param pHybridImag Hybrid output data.
*
* \return 0 on success.
*/
INT FDKhybridAnalysisApply(
HANDLE_FDK_ANA_HYB_FILTER hAnalysisHybFilter,
const FIXP_DBL *const pQmfReal,
const FIXP_DBL *const pQmfImag,
FIXP_DBL *const pHybridReal,
FIXP_DBL *const pHybridImag
);
/**
* \brief Close a Hybrid Analysis Filterbank instance.
*
* \param hAnalysisHybFilter Pointer to a Hybrid Analysis Filterbank instance.
*
* \return 0 on success.
*/
INT FDKhybridAnalysisClose(
HANDLE_FDK_ANA_HYB_FILTER hAnalysisHybFilter
);
/**
* \brief Initialize and configure Hybrdid Synthesis Filterbank instance.
*
* \param hSynthesisHybFilter A Hybrid Synthesis Filterbank handle.
* \param mode Select hybrid filter configuration.
* \param qmfBands Number of qmf bands to be processed.
* \param cplxBands Number of complex qmf bands to be processed.
*
* \return 0 on success.
*/
INT FDKhybridSynthesisInit(
HANDLE_FDK_SYN_HYB_FILTER hSynthesisHybFilter,
const FDK_HYBRID_MODE mode,
const INT qmfBands,
const INT cplxBands
);
/**
* \brief Apply Hybrid Analysis Filterbank on Hybrid data.
*
* \param hSynthesisHybFilter A Hybrid Analysis Filterbandk handle.
* \param pHybridReal Hybrid input data.
* \param pHybridImag Hybrid input data.
* \param pQmfReal Qmf output data.
* \param pQmfImag Qmf output data.
*
* \return 0 on success.
*/
INT FDKhybridSynthesisApply(
HANDLE_FDK_SYN_HYB_FILTER hSynthesisHybFilter,
const FIXP_DBL *const pHybridReal,
const FIXP_DBL *const pHybridImag,
FIXP_DBL *const pQmfReal,
FIXP_DBL *const pQmfImag
);
#endif /* __FDK_HYBRID_H */
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