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62238097c9
This is a safe cleanup change since top-level const applied to parameters in function declarations (that are not also definitions) are ignored by the compiler. Hence, such changes do not change the type of the declared functions and are simply no-ops. Bug: webrtc:13610 Change-Id: Ibafb92c45119a6d8bdb6f9109aa8dad6385163a9 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/249086 Reviewed-by: Niels Moller <nisse@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Ali Tofigh <alito@webrtc.org> Cr-Commit-Position: refs/heads/main@{#35802}
149 lines
5.5 KiB
C
149 lines
5.5 KiB
C
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/*
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* arith_routins.h
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*
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* Functions for arithmetic coding.
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*
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*/
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#ifndef MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_ARITH_ROUTINS_H_
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#define MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_ARITH_ROUTINS_H_
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#include "modules/audio_coding/codecs/isac/fix/source/structs.h"
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/****************************************************************************
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* WebRtcIsacfix_EncLogisticMulti2(...)
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*
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* Arithmetic coding of spectrum.
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*
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* Input:
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* - streamData : in-/output struct containing bitstream
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* - dataQ7 : data vector in Q7
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* - envQ8 : side info vector defining the width of the pdf
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* in Q8
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* - lenData : data vector length
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*
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* Return value : 0 if ok,
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* <0 otherwise.
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*/
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int WebRtcIsacfix_EncLogisticMulti2(Bitstr_enc* streamData,
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int16_t* dataQ7,
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const uint16_t* env,
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int16_t lenData);
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/****************************************************************************
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* WebRtcIsacfix_EncTerminate(...)
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*
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* Final call to the arithmetic coder for an encoder call. This function
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* terminates and return byte stream.
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*
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* Input:
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* - streamData : in-/output struct containing bitstream
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*
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* Return value : number of bytes in the stream
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*/
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int16_t WebRtcIsacfix_EncTerminate(Bitstr_enc* streamData);
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/****************************************************************************
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* WebRtcIsacfix_DecLogisticMulti2(...)
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*
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* Arithmetic decoding of spectrum.
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*
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* Input:
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* - streamData : in-/output struct containing bitstream
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* - envQ8 : side info vector defining the width of the pdf
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* in Q8
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* - lenData : data vector length
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*
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* Input/Output:
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* - dataQ7 : input: dither vector, output: data vector, in Q7
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*
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* Return value : number of bytes in the stream so far
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* <0 if error detected
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*/
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int WebRtcIsacfix_DecLogisticMulti2(int16_t* data,
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Bitstr_dec* streamData,
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const int32_t* env,
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int16_t lenData);
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/****************************************************************************
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* WebRtcIsacfix_EncHistMulti(...)
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*
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* Encode the histogram interval
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*
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* Input:
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* - streamData : in-/output struct containing bitstream
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* - data : data vector
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* - cdf : array of cdf arrays
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* - lenData : data vector length
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*
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* Return value : 0 if ok
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* <0 if error detected
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*/
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int WebRtcIsacfix_EncHistMulti(Bitstr_enc* streamData,
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const int16_t* data,
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const uint16_t* const* cdf,
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int16_t lenData);
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/****************************************************************************
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* WebRtcIsacfix_DecHistBisectMulti(...)
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*
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* Function to decode more symbols from the arithmetic bytestream, using
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* method of bisection.
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* C df tables should be of size 2^k-1 (which corresponds to an
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* alphabet size of 2^k-2)
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*
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* Input:
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* - streamData : in-/output struct containing bitstream
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* - cdf : array of cdf arrays
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* - cdfSize : array of cdf table sizes+1 (power of two: 2^k)
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* - lenData : data vector length
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*
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* Output:
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* - data : data vector
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*
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* Return value : number of bytes in the stream
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* <0 if error detected
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*/
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int16_t WebRtcIsacfix_DecHistBisectMulti(int16_t* data,
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Bitstr_dec* streamData,
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const uint16_t* const* cdf,
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const uint16_t* cdfSize,
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int16_t lenData);
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/****************************************************************************
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* WebRtcIsacfix_DecHistOneStepMulti(...)
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*
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* Function to decode more symbols from the arithmetic bytestream, taking
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* single step up or down at a time.
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* cdf tables can be of arbitrary size, but large tables may take a lot of
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* iterations.
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*
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* Input:
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* - streamData : in-/output struct containing bitstream
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* - cdf : array of cdf arrays
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* - initIndex : vector of initial cdf table search entries
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* - lenData : data vector length
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*
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* Output:
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* - data : data vector
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*
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* Return value : number of bytes in original stream
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* <0 if error detected
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*/
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int16_t WebRtcIsacfix_DecHistOneStepMulti(int16_t* data,
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Bitstr_dec* streamData,
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const uint16_t* const* cdf,
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const uint16_t* initIndex,
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int16_t lenData);
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#endif /* MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_ARITH_ROUTINS_H_ */
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