ref: f7479653be7649267fd9e2096adf47862cea1a95
dir: /src_common/SKP_Silk_enc_API.c/
/***********************************************************************
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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
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documentation and/or other materials provided with the distribution.
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this software without specific prior written permission.
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BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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***********************************************************************/
#include "SKP_Silk_define.h"
#include "SKP_Silk_SDK_API.h"
#include "SKP_Silk_control.h"
#include "SKP_Silk_typedef.h"
#include "SKP_Silk_structs.h"
#if FIXED_POINT
#include "SKP_Silk_main_FIX.h"
#define SKP_Silk_encoder_state_Fxx SKP_Silk_encoder_state_FIX
#define SKP_Silk_init_encoder_Fxx SKP_Silk_init_encoder_FIX
#define SKP_Silk_control_encoder_Fxx SKP_Silk_control_encoder_FIX
#define SKP_Silk_encode_frame_Fxx SKP_Silk_encode_frame_FIX
#else
#include "SKP_Silk_main_FLP.h"
#define SKP_Silk_encoder_state_Fxx SKP_Silk_encoder_state_FLP
#define SKP_Silk_init_encoder_Fxx SKP_Silk_init_encoder_FLP
#define SKP_Silk_control_encoder_Fxx SKP_Silk_control_encoder_FLP
#define SKP_Silk_encode_frame_Fxx SKP_Silk_encode_frame_FLP
#endif
#define SKP_Silk_EncodeControlStruct SKP_SILK_SDK_EncControlStruct
/**************************/
/* Encode frame with Silk */
/**************************/
static SKP_int process_enc_control_struct(
SKP_Silk_encoder_state_Fxx *psEnc, /* I/O: State */
SKP_Silk_EncodeControlStruct *encControl /* I: Control structure */
)
{
SKP_int max_internal_fs_kHz, min_internal_fs_kHz, Complexity, PacketSize_ms, PacketLoss_perc, UseInBandFEC, ret = SKP_SILK_NO_ERROR;
SKP_int32 TargetRate_bps, API_fs_Hz;
SKP_assert( encControl != NULL );
/* Check sampling frequency first, to avoid divide by zero later */
if( ( ( encControl->API_sampleRate != 8000 ) &&
( encControl->API_sampleRate != 12000 ) &&
( encControl->API_sampleRate != 16000 ) &&
( encControl->API_sampleRate != 24000 ) &&
( encControl->API_sampleRate != 32000 ) &&
( encControl->API_sampleRate != 44100 ) &&
( encControl->API_sampleRate != 48000 ) ) ||
( ( encControl->maxInternalSampleRate != 8000 ) &&
( encControl->maxInternalSampleRate != 12000 ) &&
( encControl->maxInternalSampleRate != 16000 ) ) ||
( ( encControl->minInternalSampleRate != 8000 ) &&
( encControl->minInternalSampleRate != 12000 ) &&
( encControl->minInternalSampleRate != 16000 ) ) ||
( encControl->minInternalSampleRate > encControl->maxInternalSampleRate ) ) {
ret = SKP_SILK_ENC_FS_NOT_SUPPORTED;
SKP_assert( 0 );
return( ret );
}
if( encControl->useDTX < 0 || encControl->useDTX > 1 ) {
ret = SKP_SILK_ENC_INVALID_DTX_SETTING;
}
if( encControl->useCBR < 0 || encControl->useCBR > 1 ) {
ret = SKP_SILK_ENC_INVALID_CBR_SETTING;
}
/* Set encoder parameters from control structure */
API_fs_Hz = encControl->API_sampleRate;
max_internal_fs_kHz = (SKP_int)( encControl->maxInternalSampleRate >> 10 ) + 1; /* convert Hz -> kHz */
min_internal_fs_kHz = (SKP_int)( encControl->minInternalSampleRate >> 10 ) + 1; /* convert Hz -> kHz */
PacketSize_ms = encControl->payloadSize_ms;
TargetRate_bps = encControl->bitRate;
PacketLoss_perc = encControl->packetLossPercentage;
UseInBandFEC = encControl->useInBandFEC;
Complexity = encControl->complexity;
psEnc->sCmn.useDTX = encControl->useDTX;
psEnc->sCmn.useCBR = encControl->useCBR;
/* Save values in state */
psEnc->sCmn.API_fs_Hz = API_fs_Hz;
psEnc->sCmn.maxInternal_fs_kHz = max_internal_fs_kHz;
psEnc->sCmn.minInternal_fs_kHz = min_internal_fs_kHz;
psEnc->sCmn.useInBandFEC = UseInBandFEC;
TargetRate_bps = SKP_LIMIT( TargetRate_bps, MIN_TARGET_RATE_BPS, MAX_TARGET_RATE_BPS );
if( ( ret = SKP_Silk_control_encoder_Fxx( psEnc, PacketSize_ms, TargetRate_bps,
PacketLoss_perc, Complexity) ) != 0 ) {
SKP_assert( 0 );
return( ret );
}
encControl->internalSampleRate = SKP_SMULBB( psEnc->sCmn.fs_kHz, 1000 );
return ret;
}
/****************************************/
/* Encoder functions */
/****************************************/
SKP_int SKP_Silk_SDK_Get_Encoder_Size( SKP_int32 *encSizeBytes )
{
SKP_int ret = SKP_SILK_NO_ERROR;
*encSizeBytes = sizeof( SKP_Silk_encoder_state_Fxx );
return ret;
}
/*************************/
/* Init or Reset encoder */
/*************************/
SKP_int SKP_Silk_SDK_InitEncoder(
void *encState, /* I/O: State */
SKP_Silk_EncodeControlStruct *encStatus /* O: Control structure */
)
{
SKP_Silk_encoder_state_Fxx *psEnc;
SKP_int ret = SKP_SILK_NO_ERROR;
psEnc = ( SKP_Silk_encoder_state_Fxx* )encState;
/* Reset Encoder */
if( ret += SKP_Silk_init_encoder_Fxx( psEnc ) ) {
SKP_assert( 0 );
}
/* Read control structure */
if( ret += SKP_Silk_SDK_QueryEncoder( encState, encStatus ) ) {
SKP_assert( 0 );
}
return ret;
}
/***************************************/
/* Read control structure from encoder */
/***************************************/
SKP_int SKP_Silk_SDK_QueryEncoder(
const void *encState, /* I: State Vector */
SKP_Silk_EncodeControlStruct *encStatus /* O: Control Structure */
)
{
SKP_Silk_encoder_state_Fxx *psEnc;
SKP_int ret = SKP_SILK_NO_ERROR;
psEnc = ( SKP_Silk_encoder_state_Fxx* )encState;
encStatus->API_sampleRate = psEnc->sCmn.API_fs_Hz;
encStatus->maxInternalSampleRate = SKP_SMULBB( psEnc->sCmn.maxInternal_fs_kHz, 1000 );
encStatus->minInternalSampleRate = SKP_SMULBB( psEnc->sCmn.minInternal_fs_kHz, 1000 );
encStatus->payloadSize_ms = psEnc->sCmn.PacketSize_ms;
encStatus->bitRate = psEnc->sCmn.TargetRate_bps;
encStatus->packetLossPercentage = psEnc->sCmn.PacketLoss_perc;
encStatus->complexity = psEnc->sCmn.Complexity;
encStatus->useInBandFEC = psEnc->sCmn.useInBandFEC;
encStatus->useDTX = psEnc->sCmn.useDTX;
encStatus->useCBR = psEnc->sCmn.useCBR;
encStatus->internalSampleRate = SKP_SMULBB( psEnc->sCmn.fs_kHz, 1000 );
return ret;
}
/**************************/
/* Encode frame with Silk */
/**************************/
SKP_int SKP_Silk_SDK_Encode(
void *encState, /* I/O: State */
SKP_Silk_EncodeControlStruct *encControl, /* I: Control structure */
const SKP_int16 *samplesIn, /* I: Speech sample input vector */
SKP_int nSamplesIn, /* I: Number of samples in input vector */
ec_enc *psRangeEnc, /* I/O Compressor data structure */
SKP_int32 *nBytesOut, /* I/O: Number of bytes in payload (input: Max bytes) */
const SKP_int prefillFlag /* I: Flag to indicate prefilling buffers no coding */
)
{
SKP_int tmp_payloadSize_ms, tmp_complexity, ret = 0;
SKP_int nSamplesToBuffer, nBlocksOf10ms, nSamplesFromInput = 0;
SKP_Silk_encoder_state_Fxx *psEnc = ( SKP_Silk_encoder_state_Fxx* )encState;
ret = process_enc_control_struct( psEnc, encControl );
nBlocksOf10ms = SKP_DIV32( 100 * nSamplesIn, psEnc->sCmn.API_fs_Hz );
if( prefillFlag ) {
/* Only accept input length of 10 ms */
if( nBlocksOf10ms != 1 ) {
ret = SKP_SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES;
SKP_assert( 0 );
return( ret );
}
/* Reset Encoder */
if( ret = SKP_Silk_init_encoder_Fxx( psEnc ) ) {
SKP_assert( 0 );
}
tmp_payloadSize_ms = encControl->payloadSize_ms;
encControl->payloadSize_ms = 10;
tmp_complexity = encControl->complexity;
encControl->complexity = 0;
ret = process_enc_control_struct( psEnc, encControl );
psEnc->sCmn.prefillFlag = 1;
} else {
/* Only accept input lengths that are a multiple of 10 ms */
if( nBlocksOf10ms * psEnc->sCmn.API_fs_Hz != 100 * nSamplesIn || nSamplesIn < 0 ) {
ret = SKP_SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES;
SKP_assert( 0 );
return( ret );
}
/* Make sure no more than one packet can be produced */
if( 1000 * (SKP_int32)nSamplesIn > psEnc->sCmn.PacketSize_ms * psEnc->sCmn.API_fs_Hz ) {
ret = SKP_SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES;
SKP_assert( 0 );
return( ret );
}
}
/* Input buffering/resampling and encoding */
while( 1 ) {
nSamplesToBuffer = psEnc->sCmn.frame_length - psEnc->sCmn.inputBufIx;
if( psEnc->sCmn.API_fs_Hz == SKP_SMULBB( 1000, psEnc->sCmn.fs_kHz ) ) {
nSamplesToBuffer = SKP_min_int( nSamplesToBuffer, nSamplesIn );
nSamplesFromInput = nSamplesToBuffer;
/* Copy to buffer */
SKP_memcpy( &psEnc->sCmn.inputBuf[ psEnc->sCmn.inputBufIx ], samplesIn, nSamplesFromInput * sizeof( SKP_int16 ) );
} else {
nSamplesToBuffer = SKP_min( nSamplesToBuffer, 10 * nBlocksOf10ms * psEnc->sCmn.fs_kHz );
nSamplesFromInput = SKP_DIV32_16( nSamplesToBuffer * psEnc->sCmn.API_fs_Hz, psEnc->sCmn.fs_kHz * 1000 );
/* Resample and write to buffer */
ret += SKP_Silk_resampler( &psEnc->sCmn.resampler_state, &psEnc->sCmn.inputBuf[ psEnc->sCmn.inputBufIx ], samplesIn, nSamplesFromInput );
}
samplesIn += nSamplesFromInput;
nSamplesIn -= nSamplesFromInput;
psEnc->sCmn.inputBufIx += nSamplesToBuffer;
/* Silk encoder */
if( psEnc->sCmn.inputBufIx >= psEnc->sCmn.frame_length ) {
SKP_assert( psEnc->sCmn.inputBufIx == psEnc->sCmn.frame_length );
/* Enough data in input buffer, so encode */
if( ( ret = SKP_Silk_encode_frame_Fxx( psEnc, nBytesOut, psRangeEnc ) ) != 0 ) {
SKP_assert( 0 );
}
psEnc->sCmn.inputBufIx = 0;
psEnc->sCmn.controlled_since_last_payload = 0;
if( nSamplesIn == 0 ) {
break;
}
} else {
break;
}
}
if( prefillFlag ) {
encControl->payloadSize_ms = tmp_payloadSize_ms;
encControl->complexity = tmp_complexity;
ret = process_enc_control_struct( psEnc, encControl );
psEnc->sCmn.prefillFlag = 0;
}
return ret;
}