mirror of
https://github.com/google/liblc3.git
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daa580235e
Duplicate interfaces for HR mode spec: Remove intermediate quantized table fix: legacy lc3_frame_bytes() and lc3_resolve_bitrate() Cosmetic: rename fast_xxx math function to lc3_xxx
144 lines
2.9 KiB
C
144 lines
2.9 KiB
C
/******************************************************************************
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*
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* Copyright 2022 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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#ifndef __LC3_COMMON_H
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#define __LC3_COMMON_H
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#include <lc3.h>
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#include "fastmath.h"
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#include <stdalign.h>
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#include <limits.h>
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#include <string.h>
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#ifdef __ARM_ARCH
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#include <arm_acle.h>
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#endif
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/**
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* Acivation flags for LC3-Plus and LC3-Plus HR features
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*/
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#ifndef LC3_PLUS
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#define LC3_PLUS 1
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#endif
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#ifndef LC3_PLUS_HR
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#define LC3_PLUS_HR 1
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#endif
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#if LC3_PLUS
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#define LC3_IF_PLUS(a, b) (a)
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#else
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#define LC3_IF_PLUS(a, b) (b)
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#endif
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#if LC3_PLUS_HR
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#define LC3_IF_PLUS_HR(a, b) (a)
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#else
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#define LC3_IF_PLUS_HR(a, b) (b)
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#endif
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/**
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* Hot Function attribute
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* Selectively disable sanitizer
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*/
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#ifdef __clang__
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#define LC3_HOT \
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__attribute__((no_sanitize("bounds"))) \
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__attribute__((no_sanitize("integer")))
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#else /* __clang__ */
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#define LC3_HOT
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#endif /* __clang__ */
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/**
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* Macros
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* MIN/MAX Minimum and maximum between 2 values
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* CLIP Clip a value between low and high limits
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* SATXX Signed saturation on 'xx' bits
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* ABS Return absolute value
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*/
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#define LC3_MIN(a, b) ( (a) < (b) ? (a) : (b) )
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#define LC3_MAX(a, b) ( (a) > (b) ? (a) : (b) )
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#define LC3_CLIP(v, min, max) LC3_MIN(LC3_MAX(v, min), max)
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#define LC3_SAT16(v) LC3_CLIP(v, -(1 << 15), (1 << 15) - 1)
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#define LC3_SAT24(v) LC3_CLIP(v, -(1 << 23), (1 << 23) - 1)
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#define LC3_ABS(v) ( (v) < 0 ? -(v) : (v) )
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#if defined(__ARM_FEATURE_SAT) && !(__GNUC__ < 10)
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#undef LC3_SAT16
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#define LC3_SAT16(v) __ssat(v, 16)
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#undef LC3_SAT24
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#define LC3_SAT24(v) __ssat(v, 24)
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#endif /* __ARM_FEATURE_SAT */
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/**
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* Return `true` when high-resolution mode
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*/
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static inline bool lc3_hr(enum lc3_srate sr) {
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return LC3_PLUS_HR && (sr >= LC3_SRATE_48K_HR);
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}
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/**
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* Bandwidth, mapped to Nyquist frequency of samplerates
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*/
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enum lc3_bandwidth {
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LC3_BANDWIDTH_NB = LC3_SRATE_8K,
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LC3_BANDWIDTH_WB = LC3_SRATE_16K,
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LC3_BANDWIDTH_SSWB = LC3_SRATE_24K,
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LC3_BANDWIDTH_SWB = LC3_SRATE_32K,
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LC3_BANDWIDTH_FB = LC3_SRATE_48K,
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LC3_BANDWIDTH_FB_HR = LC3_SRATE_48K_HR,
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LC3_BANDWIDTH_UB_HR = LC3_SRATE_96K_HR,
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LC3_NUM_BANDWIDTH,
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};
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/**
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* Complex floating point number
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*/
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struct lc3_complex
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{
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float re, im;
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};
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#endif /* __LC3_COMMON_H */
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