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/*
* Copyright (C) 2004-2010 NXP Software
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/****************************************************************************************
$Author: nxp007753 $
$Revision: 1081 $
$Date: 2010-07-05 11:48:44 +0200 (Mon, 05 Jul 2010) $
*****************************************************************************************/
/****************************************************************************************/
/* */
/* Header file for the application layer interface of Dynamic Bass Enhancement */
/* module. */
/* */
/* This files includes all definitions, types, structures and function */
/* prototypes required by the calling layer. All other types, structures and */
/* functions are private. */
/* */
/****************************************************************************************/
/* */
/* Note: 1 */
/* ======= */
/* The algorithm can execute either with separate input and output buffers or with */
/* a common buffer, i.e. the data is processed in-place. */
/* */
/****************************************************************************************/
/* */
/* Note: 2 */
/* ======= */
/* The Dynamic Bass Enhancement algorithm always processes data as stereo input. Mono*/
/* format data is not supported. The data is interleaved as follows: */
/* */
/* Byte Offset Stereo Input Mono-In-Stereo Input */
/* =========== ============ ==================== */
/* 0 Left Sample #1 Mono Sample #1 */
/* 2 Right Sample #1 Mono Sample #1 */
/* 4 Left Sample #2 Mono Sample #2 */
/* 6 Right Sample #2 Mono Sample #2 */
/* . . . */
/* . . . */
/* */
/* Mono format data is not supported, the calling routine must convert a Mono stream */
/* in to Mono-In-Stereo format. */
/* */
/****************************************************************************************/
#ifndef __LVDBE_H__
#define __LVDBE_H__
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/****************************************************************************************/
/* */
/* Includes */
/* */
/****************************************************************************************/
#include "LVM_Types.h"
/****************************************************************************************/
/* */
/* Definitions */
/* */
/****************************************************************************************/
/* Memory table*/
#define LVDBE_NR_MEMORY_REGIONS 4 /* Number of memory regions */
/* Bass Enhancement effect level */
#define LVDBE_EFFECT_03DB 3 /* Effect defines for backwards compatibility */
#define LVDBE_EFFECT_06DB 6
#define LVDBE_EFFECT_09DB 9
#define LVDBE_EFFECT_12DB 12
#define LVDBE_EFFECT_15DB 15
/****************************************************************************************/
/* */
/* Types */
/* */
/****************************************************************************************/
/* Instance handle */
typedef void *LVDBE_Handle_t;
/* Operating modes */
typedef enum
{
LVDBE_OFF = 0,
LVDBE_ON = 1,
LVDBE_MODE_MAX = LVM_MAXINT_32
} LVDBE_Mode_en;
/* High pass filter */
typedef enum
{
LVDBE_HPF_OFF = 0,
LVDBE_HPF_ON = 1,
LVDBE_HPF_MAX = LVM_MAXINT_32
} LVDBE_FilterSelect_en;
/* Volume control */
typedef enum
{
LVDBE_VOLUME_OFF = 0,
LVDBE_VOLUME_ON = 1,
LVDBE_VOLUME_MAX = LVM_MAXINT_32
} LVDBE_Volume_en;
/* Memory Types */
typedef enum
{
LVDBE_PERSISTENT = 0,
LVDBE_PERSISTENT_DATA = 1,
LVDBE_PERSISTENT_COEF = 2,
LVDBE_SCRATCH = 3,
LVDBE_MEMORY_MAX = LVM_MAXINT_32
} LVDBE_MemoryTypes_en;
/* Function return status */
typedef enum
{
LVDBE_SUCCESS = 0, /* Successful return from a routine */
LVDBE_ALIGNMENTERROR = 1, /* Memory alignment error */
LVDBE_NULLADDRESS = 2, /* NULL allocation address */
LVDBE_TOOMANYSAMPLES = 3, /* Maximum block size exceeded */
LVDBE_SIZEERROR = 4, /* Incorrect structure size */
LVDBE_STATUS_MAX = LVM_MAXINT_32
} LVDBE_ReturnStatus_en;
/****************************************************************************************/
/* */
/* Linked enumerated type and capability definitions */
/* */
/* The capability definitions are used to define the required capabilities at */
/* initialisation, these are added together to give the capability word. The */
/* enumerated type is used to select the mode through a control function at run time. */
/* */
/* The capability definition is related to the enumerated type value by the equation: */
/* */
/* Capability_value = 2^Enumerated_value */
/* */
/* For example, a module could be configurd at initialisation to support two sample */
/* rates only by calling the init function with the value: */
/* Capabilities.SampleRate = LVDBE_CAP_32000 + LVCS_DBE_44100; */
/* */
/* and at run time it would be passed the value LVDBE_FS_32000 through the control */
/* function to select operation at 32kHz */
/* */
/****************************************************************************************/
/*
* Bass Enhancement centre frequency
*/
#define LVDBE_CAP_CENTRE_55Hz 1
#define LVDBE_CAP_CENTRE_66Hz 2
#define LVDBE_CAP_CENTRE_78Hz 4
#define LVDBE_CAP_CENTRE_90Hz 8
typedef enum
{
LVDBE_CENTRE_55HZ = 0,
LVDBE_CENTRE_66HZ = 1,
LVDBE_CENTRE_78HZ = 2,
LVDBE_CENTRE_90HZ = 3,
LVDBE_CENTRE_MAX = LVM_MAXINT_32
} LVDBE_CentreFreq_en;
/*
* Supported sample rates in samples per second
*/
#define LVDBE_CAP_FS_8000 1
#define LVDBE_CAP_FS_11025 2
#define LVDBE_CAP_FS_12000 4
#define LVDBE_CAP_FS_16000 8
#define LVDBE_CAP_FS_22050 16
#define LVDBE_CAP_FS_24000 32
#define LVDBE_CAP_FS_32000 64
#define LVDBE_CAP_FS_44100 128
#define LVDBE_CAP_FS_48000 256
typedef enum
{
LVDBE_FS_8000 = 0,
LVDBE_FS_11025 = 1,
LVDBE_FS_12000 = 2,
LVDBE_FS_16000 = 3,
LVDBE_FS_22050 = 4,
LVDBE_FS_24000 = 5,
LVDBE_FS_32000 = 6,
LVDBE_FS_44100 = 7,
LVDBE_FS_48000 = 8,
LVDBE_FS_MAX = LVM_MAXINT_32
} LVDBE_Fs_en;
/****************************************************************************************/
/* */
/* Structures */
/* */
/****************************************************************************************/
/* Memory region definition */
typedef struct
{
LVM_UINT32 Size; /* Region size in bytes */
LVM_UINT16 Alignment; /* Region alignment in bytes */
LVDBE_MemoryTypes_en Type; /* Region type */
void *pBaseAddress; /* Pointer to the region base address */
} LVDBE_MemoryRegion_t;
/* Memory table containing the region definitions */
typedef struct
{
LVDBE_MemoryRegion_t Region[LVDBE_NR_MEMORY_REGIONS]; /* One definition for each region */
} LVDBE_MemTab_t;
/* Parameter structure */
typedef struct
{
LVDBE_Mode_en OperatingMode;
LVDBE_Fs_en SampleRate;
LVM_INT16 EffectLevel;
LVDBE_CentreFreq_en CentreFrequency;
LVDBE_FilterSelect_en HPFSelect;
LVDBE_Volume_en VolumeControl;
LVM_INT16 VolumedB;
LVM_INT16 HeadroomdB;
} LVDBE_Params_t;
/* Capability structure */
typedef struct
{
LVM_UINT16 SampleRate; /* Sampling rate capabilities */
LVM_UINT16 CentreFrequency; /* Centre frequency capabilities */
LVM_UINT16 MaxBlockSize; /* Maximum block size in sample pairs */
} LVDBE_Capabilities_t;
/****************************************************************************************/
/* */
/* Function Prototypes */
/* */
/****************************************************************************************/
/****************************************************************************************/
/* */
/* FUNCTION: LVDBE_Memory */
/* */
/* DESCRIPTION: */
/* This function is used for memory allocation and free. It can be called in */
/* two ways: */
/* */
/* hInstance = NULL Returns the memory requirements */
/* hInstance = Instance handle Returns the memory requirements and */
/* allocated base addresses for the instance */
/* */
/* When this function is called for memory allocation (hInstance=NULL) the memory */
/* base address pointers are NULL on return. */
/* */
/* When the function is called for free (hInstance = Instance Handle) the memory */
/* table returns the allocated memory and base addresses used during initialisation. */
/* */
/* PARAMETERS: */
/* hInstance Instance Handle */
/* pMemoryTable Pointer to an empty memory definition table */
/* pCapabilities Pointer to the default capabilites */
/* */
/* RETURNS: */
/* LVDBE_SUCCESS Succeeded */
/* */
/* NOTES: */
/* 1. This function may be interrupted by the LVDBE_Process function */
/* */
/****************************************************************************************/
LVDBE_ReturnStatus_en LVDBE_Memory(LVDBE_Handle_t hInstance,
LVDBE_MemTab_t *pMemoryTable,
LVDBE_Capabilities_t *pCapabilities);
/****************************************************************************************/
/* */
/* FUNCTION: LVDBE_Init */
/* */
/* DESCRIPTION: */
/* Create and initialisation function for the Bass Enhancement module */
/* */
/* This function can be used to create an algorithm instance by calling with */
/* hInstance set to NULL. In this case the algorithm returns the new instance */
/* handle. */
/* */
/* This function can be used to force a full re-initialisation of the algorithm */
/* by calling with hInstance = Instance Handle. In this case the memory table */
/* should be correct for the instance, this can be ensured by calling the function */
/* LVDBE_Memory before calling this function. */
/* */
/* PARAMETERS: */
/* hInstance Instance handle */
/* pMemoryTable Pointer to the memory definition table */
/* pCapabilities Pointer to the initialisation capabilities */
/* */
/* RETURNS: */
/* LVDBE_SUCCESS Initialisation succeeded */
/* LVDBE_ALIGNMENTERROR Instance or scratch memory on incorrect alignment */
/* LVDBE_NULLADDRESS One or more memory has a NULL pointer */
/* */
/* NOTES: */
/* 1. The instance handle is the pointer to the base address of the first memory */
/* region. */
/* 2. This function must not be interrupted by the LVDBE_Process function */
/* */
/****************************************************************************************/
LVDBE_ReturnStatus_en LVDBE_Init(LVDBE_Handle_t *phInstance,
LVDBE_MemTab_t *pMemoryTable,
LVDBE_Capabilities_t *pCapabilities);
/****************************************************************************************/
/* */
/* FUNCTION: LVDBE_GetParameters */
/* */
/* DESCRIPTION: */
/* Request the Bass Enhancement parameters. The current parameter set is returned */
/* via the parameter pointer. */
/* */
/* PARAMETERS: */
/* hInstance Instance handle */
/* pParams Pointer to an empty parameter structure */
/* */
/* RETURNS: */
/* LVDBE_SUCCESS Always succeeds */
/* */
/* NOTES: */
/* 1. This function may be interrupted by the LVDBE_Process function */
/* */
/****************************************************************************************/
LVDBE_ReturnStatus_en LVDBE_GetParameters(LVDBE_Handle_t hInstance,
LVDBE_Params_t *pParams);
/****************************************************************************************/
/* */
/* FUNCTION: LVDBE_GetCapabilities */
/* */
/* DESCRIPTION: */
/* Request the Dynamic Bass Enhancement capabilities. The initial capabilities are */
/* returned via the pointer. */
/* */
/* PARAMETERS: */
/* hInstance Instance handle */
/* pCapabilities Pointer to an empty capabilitiy structure */
/* */
/* RETURNS: */
/* LVDBE_Success Always succeeds */
/* */
/* NOTES: */
/* 1. This function may be interrupted by the LVDBE_Process function */
/* */
/****************************************************************************************/
LVDBE_ReturnStatus_en LVDBE_GetCapabilities(LVDBE_Handle_t hInstance,
LVDBE_Capabilities_t *pCapabilities);
/****************************************************************************************/
/* */
/* FUNCTION: LVDBE_Control */
/* */
/* DESCRIPTION: */
/* Sets or changes the Bass Enhancement parameters. Changing the parameters while the */
/* module is processing signals may have the following side effects: */
/* */
/* General parameters: */
/* =================== */
/* OperatingMode: Changing the mode of operation may cause a change in volume */
/* level. */
/* */
/* SampleRate: Changing the sample rate may cause pops and clicks. */
/* */
/* EffectLevel: Changing the effect level setting will have no side effects */
/* */
/* CentreFrequency: Changing the centre frequency may cause pops and clicks */
/* */
/* HPFSelect: Selecting/de-selecting the high pass filter may cause pops and */
/* clicks */
/* */
/* VolumedB Changing the volume setting will have no side effects */
/* */
/* */
/* PARAMETERS: */
/* hInstance Instance handle */
/* pParams Pointer to a parameter structure */
/* */
/* RETURNS: */
/* LVDBE_SUCCESS Always succeeds */
/* */
/* NOTES: */
/* 1. This function must not be interrupted by the LVDBE_Process function */
/* */
/****************************************************************************************/
LVDBE_ReturnStatus_en LVDBE_Control(LVDBE_Handle_t hInstance,
LVDBE_Params_t *pParams);
/****************************************************************************************/
/* */
/* FUNCTION: LVDBE_Process */
/* */
/* DESCRIPTION: */
/* Process function for the Bass Enhancement module. */
/* */
/* PARAMETERS: */
/* hInstance Instance handle */
/* pInData Pointer to the input data */
/* pOutData Pointer to the output data */
/* NumSamples Number of samples in the input buffer */
/* */
/* RETURNS: */
/* LVDBE_SUCCESS Succeeded */
/* LVDBE_TOOMANYSAMPLES NumSamples was larger than the maximum block size */
/* */
/* NOTES: */
/* */
/****************************************************************************************/
LVDBE_ReturnStatus_en LVDBE_Process(LVDBE_Handle_t hInstance,
const LVM_INT16 *pInData,
LVM_INT16 *pOutData,
LVM_UINT16 NumSamples);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __LVDBE_H__ */
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