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/* ------------------------------------------------------------------
* Copyright (C) 1998-2009 PacketVideo
*
* 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.
* -------------------------------------------------------------------
*/
/*
------------------------------------------------------------------------------
PacketVideo Corp.
MP3 Decoder Library
Filename: pvmp3_equalizer.cpp
Date: 09/21/2007
------------------------------------------------------------------------------
REVISION HISTORY
Description:
------------------------------------------------------------------------------
INPUT AND OUTPUT DEFINITIONS
Input
int32 *inData, pointer to the spectrum frequency-line
e_equalization equalizerType, equalization mode
int32 *pt_work_buff
Output
int32 *pt_work_buff pointer to the equalized frequency-line
------------------------------------------------------------------------------
FUNCTION DESCRIPTION
Equalizer
Each subband sample is scaled according to a spectrum shape setting
defined by "equalizerType"
------------------------------------------------------------------------------
REQUIREMENTS
------------------------------------------------------------------------------
REFERENCES
------------------------------------------------------------------------------
PSEUDO-CODE
------------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
; INCLUDES
----------------------------------------------------------------------------*/
#include "pvmp3_equalizer.h"
#include "pv_mp3dec_fxd_op.h"
#include "pvmp3_dec_defs.h"
/*----------------------------------------------------------------------------
; MACROS
; Define module specific macros here
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; DEFINES
; Include all pre-processor statements here. Include conditional
; compile variables also.
----------------------------------------------------------------------------*/
#define LEVEL__0__dB 0.999999970f
#define LEVEL__1_5dB 0.841395142f
#define LEVEL__3__dB 0.707106781f
#define LEVEL__4_5dB 0.595662143f
#define LEVEL__6__dB 0.500000000f
#define LEVEL__7_5dB 0.421696503f
#define LEVEL__9__dB 0.353553393f
#define LEVEL_12__dB 0.250000000f
#define LEVEL_15__dB 0.176776695f
#define LEVEL_18__dB 0.125000000f
#define LEVEL_21__dB 0.088388347f
#define LEVEL_30__dB 0.031250000f
#define LEVEL_45__dB 0.005524271f
#define LEVEL_60__dB 0.000976562f
#define Qmf31( x) (int32)(x*(float)0x7FFFFFFF)
/*----------------------------------------------------------------------------
; LOCAL FUNCTION DEFINITIONS
; Function Prototype declaration
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; LOCAL STORE/BUFFER/POINTER DEFINITIONS
; Variable declaration - defined here and used outside this module
----------------------------------------------------------------------------*/
const int32 equalizerTbl[8][SUBBANDS_NUMBER] =
{
/* FLAT */
{
Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB)
},
/* BASS BOOST */
{
Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__1_5dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__4_5dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB)
},
/* ROCK */
{
Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__1_5dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__4_5dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__1_5dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB)
},
/* POP */
{
Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__1_5dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__9__dB), Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__9__dB), Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__9__dB), Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__9__dB), Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__9__dB), Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__9__dB), Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__9__dB), Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__9__dB), Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__9__dB)
},
/* JAZZ */
{
Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__9__dB), Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__9__dB), Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__1_5dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB)
},
/* CLASSICAL */
{
Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__9__dB), Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__9__dB), Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__9__dB), Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__1_5dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB)
},
/* TALK */
{
Qmf31(LEVEL__9__dB),
Qmf31(LEVEL__6__dB), Qmf31(LEVEL__6__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__1_5dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB), Qmf31(LEVEL__3__dB),
Qmf31(LEVEL__3__dB)
},
/* FLAT */
{
Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB), Qmf31(LEVEL__0__dB),
Qmf31(LEVEL__0__dB)
}
};
/*----------------------------------------------------------------------------
; EXTERNAL FUNCTION REFERENCES
; Declare functions defined elsewhere and referenced in this module
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES
; Declare variables used in this module but defined elsewhere
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; FUNCTION CODE
----------------------------------------------------------------------------*/
void pvmp3_equalizer(int32 *circ_buffer,
e_equalization equalizerType,
int32 *work_buff)
{
if (equalizerType == flat)
{
for (int32 band = 0; band < FILTERBANK_BANDS; band += 2)
{
int32 *pt_work_buff = &work_buff[band];
int32 *inData = &circ_buffer[544 - (band<<5)];
int32 i;
for (i = 0; i < SUBBANDS_NUMBER*FILTERBANK_BANDS; i += FILTERBANK_BANDS << 2)
{
int32 temp1 = (pt_work_buff[ i ]);
int32 temp2 = (pt_work_buff[ i + FILTERBANK_BANDS ]);
int32 temp3 = (pt_work_buff[ i + 2*FILTERBANK_BANDS ]);
int32 temp4 = (pt_work_buff[ i + 3*FILTERBANK_BANDS ]);
*(inData++) = temp1;
*(inData++) = temp2;
*(inData++) = temp3;
*(inData++) = temp4;
}
inData -= SUBBANDS_NUMBER << 1;
pt_work_buff++;
for (i = 0; i < SUBBANDS_NUMBER*FILTERBANK_BANDS; i += FILTERBANK_BANDS << 2)
{
int32 temp1 = (pt_work_buff[ i ]);
int32 temp2 = (pt_work_buff[ i + FILTERBANK_BANDS ]);
int32 temp3 = (pt_work_buff[ i + 2*FILTERBANK_BANDS ]);
int32 temp4 = (pt_work_buff[ i + 3*FILTERBANK_BANDS ]);
*(inData++) = temp1;
*(inData++) = temp2;
*(inData++) = temp3;
*(inData++) = temp4;
}
}
}
else
{
const int32 *pt_equalizer = equalizerTbl[equalizerType&7];
for (int32 band = 0; band < FILTERBANK_BANDS; band += 3)
{
int32 *inData = &circ_buffer[544 - (band<<5)];
int32 *pt_work_buff = &work_buff[band];
int32 i;
for (i = 0; i < SUBBANDS_NUMBER*FILTERBANK_BANDS; i += FILTERBANK_BANDS << 2)
{
int32 temp1 = (pt_work_buff[ i ]);
int32 temp2 = (pt_work_buff[ i + FILTERBANK_BANDS ]);
int32 temp3 = (pt_work_buff[ i + 2*FILTERBANK_BANDS ]);
int32 temp4 = (pt_work_buff[ i + 3*FILTERBANK_BANDS ]);
*(inData++) = fxp_mul32_Q32(temp1 << 1, *(pt_equalizer++));
*(inData++) = fxp_mul32_Q32(temp2 << 1, *(pt_equalizer++));
*(inData++) = fxp_mul32_Q32(temp3 << 1, *(pt_equalizer++));
*(inData++) = fxp_mul32_Q32(temp4 << 1, *(pt_equalizer++));
}
pt_equalizer -= SUBBANDS_NUMBER;
inData -= SUBBANDS_NUMBER << 1;
pt_work_buff++;
for (i = 0; i < SUBBANDS_NUMBER*FILTERBANK_BANDS; i += FILTERBANK_BANDS << 2)
{
int32 temp1 = (pt_work_buff[ i ]);
int32 temp2 = (pt_work_buff[ i + FILTERBANK_BANDS ]);
int32 temp3 = (pt_work_buff[ i + 2*FILTERBANK_BANDS ]);
int32 temp4 = (pt_work_buff[ i + 3*FILTERBANK_BANDS ]);
*(inData++) = fxp_mul32_Q32(temp1 << 1, *(pt_equalizer++));
*(inData++) = fxp_mul32_Q32(temp2 << 1, *(pt_equalizer++));
*(inData++) = fxp_mul32_Q32(temp3 << 1, *(pt_equalizer++));
*(inData++) = fxp_mul32_Q32(temp4 << 1, *(pt_equalizer++));
}
pt_equalizer -= SUBBANDS_NUMBER;
}
}
}
|
