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/******************************************************************************
* *
* 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
*/
#pragma once
#define LEN_RING_BUF (12)
#define LEN_RING_BUF_SOS_1 (2)
#define LEN_RING_BUF_SOS_2 (10)
#define IIR_NUM_COEFFS (6)
#define IIR_DEN_COEFFS (11)
#define IIR_SOS_STAGES (5)
#define IIR_SOS_COEFFS (3)
typedef struct {
const FLOAT32 *ptr_coeff_iir_num;
const FLOAT32 *ptr_coeff_iir_den;
WORD32 max;
FLOAT32 ring_buf_1[LEN_RING_BUF];
FLOAT32 ring_buf_2[LEN_RING_BUF];
} ixheaace_iir_filter;
typedef struct {
const FLOAT32 *ptr_coeff_iir_num;
const FLOAT32 *ptr_coeff_iir_den;
FLOAT32 gain_sos;
FLOAT32 ring_buf_sos_1[LEN_RING_BUF_SOS_1];
FLOAT32 ring_buf_sos_2[LEN_RING_BUF_SOS_2];
} ixheaace_iir_sos_filter;
struct ixheaace_iir_params {
const FLOAT32 coeff_iir_num[IIR_NUM_COEFFS];
const FLOAT32 coeff_iir_den[IIR_DEN_COEFFS];
const WORD32 max;
const WORD32 delay;
};
struct ixheaace_iir_params_sos {
const FLOAT32 coeff_iir_sos_num[IIR_SOS_STAGES][IIR_SOS_COEFFS];
const FLOAT32 coeff_iir_sos_den[IIR_SOS_STAGES][IIR_SOS_COEFFS];
const FLOAT32 gain_sos;
const WORD32 delay;
};
typedef struct {
struct ixheaace_iir_params const iir_param_set;
} ixheaace_resampler_table;
typedef struct {
struct ixheaace_iir_params_sos const iir_param_set_sos;
} ixheaace_resampler_sos_table;
typedef struct {
ixheaace_iir_filter iir_filter;
WORD32 ratio;
WORD32 delay;
WORD32 pending;
} ixheaace_iir21_resampler;
typedef struct {
ixheaace_iir_sos_filter iir_filter;
WORD32 ratio;
WORD32 delay;
WORD32 pending;
} ixheaace_iir_sos_resampler;
typedef struct {
FLOAT32 downsampler_in_buffer[INPUT_LEN_DOWNSAMPLE * IXHEAACE_MAX_CH_IN_BS_ELE * UPSAMPLE_FAC];
FLOAT32
downsampler_out_buffer[INPUT_LEN_DOWNSAMPLE * IXHEAACE_MAX_CH_IN_BS_ELE * UPSAMPLE_FAC];
FLOAT32 scratch_buf1_temp[IIR_SOS_COEFFS];
FLOAT32 scratch_buf2_temp[IIR_SOS_COEFFS];
FLOAT32 ring_buf_temp[LEN_RING_BUF];
} ixheaace_resampler_scratch;
WORD32 ixheaace_resampler_scr_size(VOID);
VOID ixheaace_get_input_scratch_buf(VOID *ptr_scr, FLOAT32 **ptr_scratch_buf_inp);
IA_ERRORCODE ia_enhaacplus_enc_init_iir_resampler(ixheaace_iir21_resampler *pstr_resampler,
WORD32 ratio,
ixheaace_resampler_table *pstr_resampler_table);
VOID ia_enhaacplus_enc_iir_downsampler(ixheaace_iir21_resampler *pstr_down_sampler,
FLOAT32 *ptr_in_samples, WORD32 num_in_samples,
WORD32 in_stride, FLOAT32 *ptr_out_samples,
WORD32 *num_out_samples, WORD32 out_stride,
FLOAT32 *ptr_ring_buf1, FLOAT32 *ptr_ring_buf2,
ixheaace_resampler_scratch *pstr_resampler_scratch);
VOID ia_enhaacplus_enc_iir_sos_downsampler(ixheaace_iir_sos_resampler *pstr_down_sampler,
FLOAT32 *ptr_in_samples, WORD32 num_in_samples,
WORD32 in_stride, FLOAT32 *ptr_out_samples,
WORD32 *num_out_samples, FLOAT32 *ptr_ring_buf1,
FLOAT32 *ptr_ring_buf2,
ixheaace_resampler_scratch *pstr_resampler_scratch);
VOID ia_enhaacplus_enc_iir_sos_upsampler(ixheaace_iir_sos_resampler *pstr_up_sampler,
FLOAT32 *ptr_in_samples, WORD32 num_in_samples,
WORD32 in_stride, FLOAT32 *ptr_out_samples,
WORD32 *num_out_samples, FLOAT32 *ptr_ring_buf1,
FLOAT32 *ptr_ring_buf2,
ixheaace_resampler_scratch *pstr_resampler_scratch);
WORD32 ia_enhaacplus_enc_compute_resampling_ratio(WORD32 ccfl_idx);
VOID ixheaace_upsampling_inp_buf_generation(FLOAT32 *ptr_inp_buf, FLOAT32 *ptr_temp_buf,
WORD32 num_samples, WORD32 upsamp_fac, WORD32 offset);
IA_ERRORCODE
ia_enhaacplus_enc_init_iir_sos_resampler(ixheaace_iir_sos_resampler *pstr_resampler, WORD32 ratio,
ixheaace_resampler_sos_table *pstr_resampler_table);
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