shithub: opus

ref: 2ca6c5d2c6e68ca4c0302a352d717857fc1bc65d
dir: /silk/silk_API.h/

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/***********************************************************************
Copyright (c) 2006-2011, Skype Limited. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, (subject to the limitations in the disclaimer below)
are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of Skype Limited, nor the names of specific
contributors, may be used to endorse or promote products derived from
this software without specific prior written permission.
NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
***********************************************************************/

#ifndef SILK_API_H
#define SILK_API_H

#include "silk_control.h"
#include "silk_typedef.h"
#include "silk_errors.h"
#include "entenc.h"
#include "entdec.h"

#ifdef __cplusplus
extern "C"
{
#endif

#define SILK_MAX_FRAMES_PER_PACKET  3

/* Struct for TOC (Table of Contents) */
typedef struct {
    opus_int     VADFlag;                                /* Voice activity for packet                            */
    opus_int     VADFlags[ SILK_MAX_FRAMES_PER_PACKET ]; /* Voice activity for each frame in packet              */
    opus_int     inbandFECFlag;                          /* Flag indicating if packet contains in-band FEC       */
} silk_TOC_struct;

/****************************************/
/* Encoder functions                    */
/****************************************/

/***********************************************/
/* Get size in bytes of the Silk encoder state */
/***********************************************/
opus_int silk_Get_Encoder_Size(                          /* O:   Returns error code                              */
    int                                  *encSizeBytes   /* O:   Number of bytes in SILK encoder state           */
);

/*************************/
/* Init or reset encoder */
/*************************/
opus_int silk_InitEncoder(                               /* O:   Returns error code                              */
    void                                *encState,      /* I/O: State                                           */
    silk_EncControlStruct               *encStatus      /* O:   Encoder Status                                  */
);

/***************************************/
/* Read control structure from encoder */
/***************************************/
opus_int silk_QueryEncoder(                              /* O:   Returns error code                              */
    const void                          *encState,      /* I:   State                                           */
    silk_EncControlStruct               *encStatus      /* O:   Encoder Status                                  */
);

/**************************/
/* Encode frame with Silk */
/**************************/
/* Note: if prefillFlag is set, the input must contain 10 ms of audio, irrespective of what                     */
/* encControl->payloadSize_ms is set to                                                                         */
opus_int silk_Encode(                                    /* O:   Returns error code                              */
    void                                *encState,      /* I/O: State                                           */
    silk_EncControlStruct               *encControl,    /* I:   Control status                                  */
    const opus_int16                     *samplesIn,     /* I:   Speech sample input vector                      */
    opus_int                             nSamplesIn,     /* I:   Number of samples in input vector               */
    ec_enc                              *psRangeEnc,    /* I/O  Compressor data structure                       */
    opus_int                             *nBytesOut,     /* I/O: Number of bytes in payload (input: Max bytes)   */
    const opus_int                       prefillFlag     /* I:   Flag to indicate prefilling buffers no coding   */
);

/****************************************/
/* Decoder functions                    */
/****************************************/

/***********************************************/
/* Get size in bytes of the Silk decoder state */
/***********************************************/
opus_int silk_Get_Decoder_Size(                          /* O:   Returns error code                              */
    int                                  *decSizeBytes   /* O:   Number of bytes in SILK decoder state           */
);

/*************************/
/* Init or Reset decoder */
/*************************/
opus_int silk_InitDecoder(                               /* O:   Returns error code                              */
    void                                *decState       /* I/O: State                                           */
);

/******************/
/* Decode a frame */
/******************/
opus_int silk_Decode(                                    /* O:   Returns error code                              */
    void*                               decState,       /* I/O: State                                           */
    silk_DecControlStruct*              decControl,     /* I/O: Control Structure                               */
    opus_int                             lostFlag,       /* I:   0: no loss, 1 loss, 2 decode fec                */
    opus_int                             newPacketFlag,  /* I:   Indicates first decoder call for this packet    */
    ec_dec                              *psRangeDec,    /* I/O  Compressor data structure                       */
    opus_int16                           *samplesOut,    /* O:   Decoded output speech vector                    */
    opus_int32                           *nSamplesOut    /* O:   Number of samples decoded                       */
);

/**************************************/
/* Get table of contents for a packet */
/**************************************/
opus_int silk_get_TOC(
    const opus_uint8                     *payload,           /* I    Payload data                                */
    const opus_int                       nBytesIn,           /* I:   Number of input bytes                       */
    const opus_int                       nFramesPerPayload,  /* I:   Number of SILK frames per payload           */
    silk_TOC_struct                     *Silk_TOC           /* O:   Type of content                             */
);

#ifdef __cplusplus
}
#endif

#endif