252 lines
8.2 KiB
C
252 lines
8.2 KiB
C
/*
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* Copyright (c) 2012 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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* ilbc.h
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*
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* This header file contains all of the API's for iLBC.
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*
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*/
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#ifndef MODULES_AUDIO_CODING_CODECS_ILBC_ILBC_H_
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#define MODULES_AUDIO_CODING_CODECS_ILBC_ILBC_H_
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#include <stddef.h>
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#include <stdint.h>
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/*
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* Solution to support multiple instances
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* Customer has to cast instance to proper type
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*/
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typedef struct iLBC_encinst_t_ IlbcEncoderInstance;
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typedef struct iLBC_decinst_t_ IlbcDecoderInstance;
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/*
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* Comfort noise constants
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*/
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#define ILBC_SPEECH 1
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#define ILBC_CNG 2
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#ifdef __cplusplus
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extern "C" {
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#endif
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/****************************************************************************
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* WebRtcIlbcfix_XxxAssign(...)
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*
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* These functions assigns the encoder/decoder instance to the specified
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* memory location
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*
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* Input:
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* - XXX_xxxinst : Pointer to created instance that should be
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* assigned
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* - ILBCXXX_inst_Addr : Pointer to the desired memory space
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* - size : The size that this structure occupies (in Word16)
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int16_t WebRtcIlbcfix_EncoderAssign(IlbcEncoderInstance** iLBC_encinst,
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int16_t* ILBCENC_inst_Addr,
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int16_t* size);
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int16_t WebRtcIlbcfix_DecoderAssign(IlbcDecoderInstance** iLBC_decinst,
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int16_t* ILBCDEC_inst_Addr,
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int16_t* size);
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/****************************************************************************
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* WebRtcIlbcfix_XxxAssign(...)
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*
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* These functions create a instance to the specified structure
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*
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* Input:
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* - XXX_inst : Pointer to created instance that should be created
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int16_t WebRtcIlbcfix_EncoderCreate(IlbcEncoderInstance** iLBC_encinst);
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int16_t WebRtcIlbcfix_DecoderCreate(IlbcDecoderInstance** iLBC_decinst);
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/****************************************************************************
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* WebRtcIlbcfix_XxxFree(...)
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*
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* These functions frees the dynamic memory of a specified instance
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*
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* Input:
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* - XXX_inst : Pointer to created instance that should be freed
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int16_t WebRtcIlbcfix_EncoderFree(IlbcEncoderInstance* iLBC_encinst);
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int16_t WebRtcIlbcfix_DecoderFree(IlbcDecoderInstance* iLBC_decinst);
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/****************************************************************************
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* WebRtcIlbcfix_EncoderInit(...)
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*
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* This function initializes a iLBC instance
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*
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* Input:
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* - iLBCenc_inst : iLBC instance, i.e. the user that should receive
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* be initialized
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* - frameLen : The frame length of the codec 20/30 (ms)
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int16_t WebRtcIlbcfix_EncoderInit(IlbcEncoderInstance* iLBCenc_inst,
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int16_t frameLen);
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/****************************************************************************
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* WebRtcIlbcfix_Encode(...)
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*
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* This function encodes one iLBC frame. Input speech length has be a
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* multiple of the frame length.
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*
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* Input:
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* - iLBCenc_inst : iLBC instance, i.e. the user that should encode
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* a package
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* - speechIn : Input speech vector
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* - len : Samples in speechIn (160, 240, 320 or 480)
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*
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* Output:
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* - encoded : The encoded data vector
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*
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* Return value : >0 - Length (in bytes) of coded data
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* -1 - Error
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*/
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int WebRtcIlbcfix_Encode(IlbcEncoderInstance* iLBCenc_inst,
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const int16_t* speechIn,
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size_t len,
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uint8_t* encoded);
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/****************************************************************************
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* WebRtcIlbcfix_DecoderInit(...)
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*
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* This function initializes a iLBC instance with either 20 or 30 ms frames
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* Alternatively the WebRtcIlbcfix_DecoderInit_XXms can be used. Then it's
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* not needed to specify the frame length with a variable.
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*
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* Input:
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* - IlbcDecoderInstance : iLBC decoder instance
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* - frameLen : The frame length of the codec 20/30 (ms)
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int16_t WebRtcIlbcfix_DecoderInit(IlbcDecoderInstance* iLBCdec_inst,
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int16_t frameLen);
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void WebRtcIlbcfix_DecoderInit20Ms(IlbcDecoderInstance* iLBCdec_inst);
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void WebRtcIlbcfix_Decoderinit30Ms(IlbcDecoderInstance* iLBCdec_inst);
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/****************************************************************************
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* WebRtcIlbcfix_Decode(...)
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*
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* This function decodes a packet with iLBC frame(s). Output speech length
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* will be a multiple of 160 or 240 samples ((160 or 240)*frames/packet).
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*
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* Input:
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* - iLBCdec_inst : iLBC instance, i.e. the user that should decode
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* a packet
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* - encoded : Encoded iLBC frame(s)
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* - len : Bytes in encoded vector
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*
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* Output:
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* - decoded : The decoded vector
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* - speechType : 1 normal, 2 CNG
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*
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* Return value : >0 - Samples in decoded vector
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* -1 - Error
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*/
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int WebRtcIlbcfix_Decode(IlbcDecoderInstance* iLBCdec_inst,
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const uint8_t* encoded,
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size_t len,
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int16_t* decoded,
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int16_t* speechType);
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int WebRtcIlbcfix_Decode20Ms(IlbcDecoderInstance* iLBCdec_inst,
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const uint8_t* encoded,
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size_t len,
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int16_t* decoded,
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int16_t* speechType);
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int WebRtcIlbcfix_Decode30Ms(IlbcDecoderInstance* iLBCdec_inst,
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const uint8_t* encoded,
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size_t len,
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int16_t* decoded,
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int16_t* speechType);
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/****************************************************************************
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* WebRtcIlbcfix_DecodePlc(...)
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*
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* This function conducts PLC for iLBC frame(s). Output speech length
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* will be a multiple of 160 or 240 samples.
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*
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* Input:
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* - iLBCdec_inst : iLBC instance, i.e. the user that should perform
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* a PLC
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* - noOfLostFrames : Number of PLC frames to produce
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*
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* Output:
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* - decoded : The "decoded" vector
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*
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* Return value : Samples in decoded PLC vector
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*/
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size_t WebRtcIlbcfix_DecodePlc(IlbcDecoderInstance* iLBCdec_inst,
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int16_t* decoded,
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size_t noOfLostFrames);
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/****************************************************************************
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* WebRtcIlbcfix_NetEqPlc(...)
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*
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* This function updates the decoder when a packet loss has occured, but it
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* does not produce any PLC data. Function can be used if another PLC method
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* is used (i.e NetEq).
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*
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* Input:
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* - iLBCdec_inst : iLBC instance that should be updated
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* - noOfLostFrames : Number of lost frames
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*
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* Output:
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* - decoded : The "decoded" vector (nothing in this case)
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*
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* Return value : Samples in decoded PLC vector
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*/
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size_t WebRtcIlbcfix_NetEqPlc(IlbcDecoderInstance* iLBCdec_inst,
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int16_t* decoded,
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size_t noOfLostFrames);
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/****************************************************************************
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* WebRtcIlbcfix_version(...)
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*
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* This function returns the version number of iLBC
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*
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* Output:
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* - version : Version number of iLBC (maximum 20 char)
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*/
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void WebRtcIlbcfix_version(char* version);
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#ifdef __cplusplus
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}
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#endif
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#endif // MODULES_AUDIO_CODING_CODECS_ILBC_ILBC_H_
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