API.h

/***********************************************************************
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***********************************************************************/

#ifndef SILK_API_H
#define SILK_API_H

#include "control.h"
#include "typedef.h"
#include "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 */
 opus_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 */
 int arch, /* I Run-time architecture */
 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_int32 *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 */
 opus_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 */
 int arch /* I Run-time architecture */
);

#if 0
/**************************************/
/* 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 */
);
#endif

#ifdef __cplusplus
}
#endif

#endif