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In order to eliminate the WebRTC Subtree mirror in Chromium, WebRTC is moving the content of the src/webrtc directory up to the src/ directory. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38 Reviewed-on: https://webrtc-review.googlesource.com/1560 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19845}
160 lines
5 KiB
C
160 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 WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_ARITH_ROUTINS_H_
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#define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_ARITH_ROUTINS_H_
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#include "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 /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_SOURCE_ARITH_ROUTINS_H_ */
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