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08973eed36
WebRTC internal code should always used include paths that starts from the root of the project and that clearly identify the header file. This allows 'gn check' to actually keep dependencies under control because 'gn check' cannot enforce anything if the include path is not fully qualified (starting from the root of the project). Bug: webrtc:8815 Change-Id: I23fb4fed0c27a4d98bea360315b959af843587bc Reviewed-on: https://webrtc-review.googlesource.com/46101 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21847}
159 lines
5 KiB
C
159 lines
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(
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Bitstr_enc *streamData,
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int16_t *dataQ7,
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const uint16_t *env,
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const 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(
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int16_t *data,
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Bitstr_dec *streamData,
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const int32_t *env,
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const 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(
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Bitstr_enc *streamData,
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const int16_t *data,
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const uint16_t *const *cdf,
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const 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(
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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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const 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(
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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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const int16_t lenData);
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#endif /* MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_ARITH_ROUTINS_H_ */
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