diff options
Diffstat (limited to 'media/libeffects/lvm/lib/SpectrumAnalyzer/src/LVPSA_QPD.h')
| -rw-r--r-- | media/libeffects/lvm/lib/SpectrumAnalyzer/src/LVPSA_QPD.h | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/media/libeffects/lvm/lib/SpectrumAnalyzer/src/LVPSA_QPD.h b/media/libeffects/lvm/lib/SpectrumAnalyzer/src/LVPSA_QPD.h new file mode 100644 index 0000000..836bfd7 --- /dev/null +++ b/media/libeffects/lvm/lib/SpectrumAnalyzer/src/LVPSA_QPD.h @@ -0,0 +1,90 @@ +/* + * 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. + */ + +#ifndef _LVPSA_QPD_H_ +#define _LVPSA_QPD_H_ + +#include "LVM_Types.h" + + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +typedef struct +{ + LVM_INT32 *pDelay; /* pointer to the delayed samples (data of 32 bits) */ + LVM_INT32 Coefs[2]; /* pointer to the filter coefficients */ +}QPD_State_t, *pQPD_State_t; + +typedef struct +{ + LVM_INT32 KP; /*should store a0*/ + LVM_INT32 KM; /*should store b2*/ + +} QPD_C32_Coefs, *PQPD_C32_Coefs; + +typedef struct +{ + LVM_INT32 Storage[1]; + +} QPD_Taps_t, *pQPD_Taps_t; + +/************************************************************************************/ +/* */ +/* FUNCTION: LVPSA_QPD_Process */ +/* */ +/* DESCRIPTION: */ +/* Apply downsampling, post gain, quasi peak filtering and write the levels values */ +/* in the buffer every 20 ms. */ +/* */ +/* PARAMETERS: */ +/* */ +/* RETURNS: void */ +/* */ +/************************************************************************************/ +void LVPSA_QPD_Process ( void *hInstance, + LVM_INT16 *pInSamps, + LVM_INT16 numSamples, + LVM_INT16 BandIndex); + +/************************************************************************************/ +/* */ +/* FUNCTION: LVPSA_QPD_Init */ +/* */ +/* DESCRIPTION: */ +/* Initialize a quasi peak filter instance. */ +/* */ +/* PARAMETERS: */ +/* pInstance Pointer to the instance */ +/* pTaps Pointer to the filter's taps */ +/* pCoef Pointer to the filter's coefficients */ +/* */ +/* RETURNS: void */ +/* */ +/************************************************************************************/ +void LVPSA_QPD_Init ( QPD_State_t *pInstance, + QPD_Taps_t *pTaps, + QPD_C32_Coefs *pCoef ); + + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif + |