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git-svn-id: http://webrtc.googlecode.com/svn/trunk@4 4adac7df-926f-26a2-2b94-8c16560cd09d

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niklase@google.com
2011-05-30 11:22:19 +00:00
parent 01813fe945
commit 77ae29bc81
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modules/audio_coding/codecs/iLBC/main/interface/ilbc.h Normal file
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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
/*
* ilbc.h
*
* This header file contains all of the API's for iLBC.
*
*/
#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_INTERFACE_ILBC_H_
#define WEBRTC_MODULES_AUDIO_CODING_CODECS_ILBC_MAIN_INTERFACE_ILBC_H_
/*
* Define the fixpoint numeric formats
*/
#include "typedefs.h"
/*
* Solution to support multiple instances
* Customer has to cast instance to proper type
*/
typedef struct iLBC_encinst_t_ iLBC_encinst_t;
typedef struct iLBC_decinst_t_ iLBC_decinst_t;
/*
* Comfort noise constants
*/
#define ILBC_SPEECH 1
#define ILBC_CNG 2
#ifdef __cplusplus
extern "C" {
#endif
/****************************************************************************
* WebRtcIlbcfix_XxxAssign(...)
*
* These functions assigns the encoder/decoder instance to the specified
* memory location
*
* Input:
* - XXX_xxxinst : Pointer to created instance that should be
* assigned
* - ILBCXXX_inst_Addr : Pointer to the desired memory space
* - size : The size that this structure occupies (in Word16)
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIlbcfix_EncoderAssign(iLBC_encinst_t **iLBC_encinst,
WebRtc_Word16 *ILBCENC_inst_Addr,
WebRtc_Word16 *size);
WebRtc_Word16 WebRtcIlbcfix_DecoderAssign(iLBC_decinst_t **iLBC_decinst,
WebRtc_Word16 *ILBCDEC_inst_Addr,
WebRtc_Word16 *size);
/****************************************************************************
* WebRtcIlbcfix_XxxAssign(...)
*
* These functions create a instance to the specified structure
*
* Input:
* - XXX_inst : Pointer to created instance that should be created
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIlbcfix_EncoderCreate(iLBC_encinst_t **iLBC_encinst);
WebRtc_Word16 WebRtcIlbcfix_DecoderCreate(iLBC_decinst_t **iLBC_decinst);
/****************************************************************************
* WebRtcIlbcfix_XxxFree(...)
*
* These functions frees the dynamic memory of a specified instance
*
* Input:
* - XXX_inst : Pointer to created instance that should be freed
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIlbcfix_EncoderFree(iLBC_encinst_t *iLBC_encinst);
WebRtc_Word16 WebRtcIlbcfix_DecoderFree(iLBC_decinst_t *iLBC_decinst);
/****************************************************************************
* WebRtcIlbcfix_EncoderInit(...)
*
* This function initializes a iLBC instance
*
* Input:
* - iLBCenc_inst : iLBC instance, i.e. the user that should receive
* be initialized
* - frameLen : The frame length of the codec 20/30 (ms)
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIlbcfix_EncoderInit(iLBC_encinst_t *iLBCenc_inst,
WebRtc_Word16 frameLen);
/****************************************************************************
* WebRtcIlbcfix_Encode(...)
*
* This function encodes one iLBC frame. Input speech length has be a
* multiple of the frame length.
*
* Input:
* - iLBCenc_inst : iLBC instance, i.e. the user that should encode
* a package
* - speechIn : Input speech vector
* - len : Samples in speechIn (160, 240, 320 or 480)
*
* Output:
* - encoded : The encoded data vector
*
* Return value : >0 - Length (in bytes) of coded data
* -1 - Error
*/
WebRtc_Word16 WebRtcIlbcfix_Encode(iLBC_encinst_t *iLBCenc_inst,
WebRtc_Word16 *speechIn,
WebRtc_Word16 len,
WebRtc_Word16 *encoded);
/****************************************************************************
* WebRtcIlbcfix_DecoderInit(...)
*
* This function initializes a iLBC instance with either 20 or 30 ms frames
* Alternatively the WebRtcIlbcfix_DecoderInit_XXms can be used. Then it's
* not needed to specify the frame length with a variable.
*
* Input:
* - iLBC_decinst_t : iLBC instance, i.e. the user that should receive
* be initialized
* - frameLen : The frame length of the codec 20/30 (ms)
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIlbcfix_DecoderInit(iLBC_decinst_t *iLBCdec_inst,
WebRtc_Word16 frameLen);
WebRtc_Word16 WebRtcIlbcfix_DecoderInit20Ms(iLBC_decinst_t *iLBCdec_inst);
WebRtc_Word16 WebRtcIlbcfix_Decoderinit30Ms(iLBC_decinst_t *iLBCdec_inst);
/****************************************************************************
* WebRtcIlbcfix_Decode(...)
*
* This function decodes a packet with iLBC frame(s). Output speech length
* will be a multiple of 160 or 240 samples ((160 or 240)*frames/packet).
*
* Input:
* - iLBCdec_inst : iLBC instance, i.e. the user that should decode
* a packet
* - encoded : Encoded iLBC frame(s)
* - len : Bytes in encoded vector
*
* Output:
* - decoded : The decoded vector
* - speechType : 1 normal, 2 CNG
*
* Return value : >0 - Samples in decoded vector
* -1 - Error
*/
WebRtc_Word16 WebRtcIlbcfix_Decode(iLBC_decinst_t *iLBCdec_inst,
WebRtc_Word16* encoded,
WebRtc_Word16 len,
WebRtc_Word16 *decoded,
WebRtc_Word16 *speechType);
WebRtc_Word16 WebRtcIlbcfix_Decode20Ms(iLBC_decinst_t *iLBCdec_inst,
WebRtc_Word16 *encoded,
WebRtc_Word16 len,
WebRtc_Word16 *decoded,
WebRtc_Word16 *speechType);
WebRtc_Word16 WebRtcIlbcfix_Decode30Ms(iLBC_decinst_t *iLBCdec_inst,
WebRtc_Word16 *encoded,
WebRtc_Word16 len,
WebRtc_Word16 *decoded,
WebRtc_Word16 *speechType);
/****************************************************************************
* WebRtcIlbcfix_DecodePlc(...)
*
* This function conducts PLC for iLBC frame(s). Output speech length
* will be a multiple of 160 or 240 samples.
*
* Input:
* - iLBCdec_inst : iLBC instance, i.e. the user that should perform
* a PLC
* - noOfLostFrames : Number of PLC frames to produce
*
* Output:
* - decoded : The "decoded" vector
*
* Return value : >0 - Samples in decoded PLC vector
* -1 - Error
*/
WebRtc_Word16 WebRtcIlbcfix_DecodePlc(iLBC_decinst_t *iLBCdec_inst,
WebRtc_Word16 *decoded,
WebRtc_Word16 noOfLostFrames);
/****************************************************************************
* WebRtcIlbcfix_NetEqPlc(...)
*
* This function updates the decoder when a packet loss has occured, but it
* does not produce any PLC data. Function can be used if another PLC method
* is used (i.e NetEq).
*
* Input:
* - iLBCdec_inst : iLBC instance that should be updated
* - noOfLostFrames : Number of lost frames
*
* Output:
* - decoded : The "decoded" vector (nothing in this case)
*
* Return value : >0 - Samples in decoded PLC vector
* -1 - Error
*/
WebRtc_Word16 WebRtcIlbcfix_NetEqPlc(iLBC_decinst_t *iLBCdec_inst,
WebRtc_Word16 *decoded,
WebRtc_Word16 noOfLostFrames);
/****************************************************************************
* WebRtcIlbcfix_version(...)
*
* This function returns the version number of iLBC
*
* Output:
* - version : Version number of iLBC (maximum 20 char)
*/
void WebRtcIlbcfix_version(WebRtc_Word8 *version);
#ifdef __cplusplus
}
#endif
#endif