54 lines
2 KiB
C
54 lines
2 KiB
C
/******************************************************************************
|
|
* *
|
|
* Copyright (C) 2023 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.
|
|
*
|
|
*****************************************************************************
|
|
* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
|
|
*/
|
|
|
|
#include <math.h>
|
|
|
|
#include "ixheaac_type_def.h"
|
|
#include "ixheaac_constants.h"
|
|
#include "ixheaace_aac_constants.h"
|
|
#include "ixheaace_psy_const.h"
|
|
#include "ixheaace_tns.h"
|
|
#include "ixheaace_tns_params.h"
|
|
#include "ixheaace_rom.h"
|
|
#include "ixheaace_quant.h"
|
|
#include "ixheaace_common_rom.h"
|
|
#include "ixheaace_bitbuffer.h"
|
|
|
|
VOID iaace_quantize_lines(const WORD32 gain, const WORD32 num_lines, FLOAT32 *ptr_exp_spec,
|
|
WORD16 *ptr_quant_spec, FLOAT32 *ptr_mdct_spec) {
|
|
FLOAT32 quantizer;
|
|
FLOAT32 k = -0.0946f + 0.5f;
|
|
WORD32 line;
|
|
|
|
quantizer = ixheaace_fd_quant_table[gain + 128];
|
|
|
|
for (line = 0; line < num_lines; line++) {
|
|
FLOAT32 tmp = ptr_mdct_spec[line];
|
|
if (tmp < 0.0f) {
|
|
ptr_exp_spec[line] = (FLOAT32)sqrt(-tmp);
|
|
ptr_exp_spec[line] *= (FLOAT32)sqrt(ptr_exp_spec[line]);
|
|
ptr_quant_spec[line] = -(WORD16)(k + quantizer * ptr_exp_spec[line]);
|
|
} else {
|
|
ptr_exp_spec[line] = (FLOAT32)sqrt(tmp);
|
|
ptr_exp_spec[line] *= (FLOAT32)sqrt(ptr_exp_spec[line]);
|
|
ptr_quant_spec[line] = (WORD16)(k + quantizer * ptr_exp_spec[line]);
|
|
}
|
|
}
|
|
}
|