void SKP_Silk_LBRR_embed(
SKP_Silk_encoder_state *psEncC, /* I/O Encoder state */
ec_enc *psRangeEnc /* I/O Compressor data structure */
)
{
SKP_int i;
SKP_int32 LBRR_symbol;
/* Encode LBRR flags */
LBRR_symbol = 0;
for( i = 0; i < psEncC->nFramesPerPacket; i++ ) {
LBRR_symbol |= SKP_LSHIFT( psEncC->LBRR_flags[ i ], i );
}
psEncC->LBRR_flag = LBRR_symbol > 0 ? 1 : 0;
if( LBRR_symbol && psEncC->nFramesPerPacket > 1 ) {
ec_enc_icdf( psRangeEnc, LBRR_symbol - 1, SKP_Silk_LBRR_flags_iCDF_ptr[ psEncC->nFramesPerPacket - 2 ], 8 );
}
/* Code indices and excitation signals */
for( i = 0; i < psEncC->nFramesPerPacket; i++ ) {
if( psEncC->LBRR_flags[ i ] ) {
SKP_Silk_encode_indices( psEncC, psRangeEnc, i, 1 );
SKP_Silk_encode_pulses( psRangeEnc, psEncC->indices_LBRR[i].signalType,
psEncC->indices_LBRR[i].quantOffsetType, psEncC->pulses_LBRR[ i ], psEncC->frame_length );
}
}
}
int SKP_Silk_encode_frame_FIX(SKP_Silk_encoder_state_FIX * psEnc, /* I/O Pointer to Silk FIX encoder state */
uint8_t * pCode, /* O Pointer to payload */
int16_t * pnBytesOut, /* I/O Pointer to number of payload bytes */
/* input: max length; output: used */
const int16_t * pIn /* I Pointer to input speech frame */
) {
SKP_Silk_encoder_control_FIX sEncCtrl;
int i, nBytes, ret = 0;
int16_t *x_frame, *res_pitch_frame;
int16_t xfw[MAX_FRAME_LENGTH];
int16_t pIn_HP[MAX_FRAME_LENGTH];
int16_t res_pitch[2 * MAX_FRAME_LENGTH + LA_PITCH_MAX];
int LBRR_idx, frame_terminator, SNR_dB_Q7;
const uint16_t *FrameTermination_CDF;
/* Low bitrate redundancy parameters */
uint8_t LBRRpayload[MAX_ARITHM_BYTES];
int16_t nBytesLBRR;
//int32_t Seed[ MAX_LAYERS ];
sEncCtrl.sCmn.Seed = psEnc->sCmn.frameCounter++ & 3;
/**************************************************************/
/* Setup Input Pointers, and insert frame in input buffer */
/*************************************************************/
x_frame = psEnc->x_buf + psEnc->sCmn.frame_length; /* start of frame to encode */
res_pitch_frame = res_pitch + psEnc->sCmn.frame_length; /* start of pitch LPC residual frame */
/****************************/
/* Voice Activity Detection */
/****************************/
ret =
SKP_Silk_VAD_GetSA_Q8(&psEnc->sCmn.sVAD, &psEnc->speech_activity_Q8,
&SNR_dB_Q7, sEncCtrl.input_quality_bands_Q15,
&sEncCtrl.input_tilt_Q15, pIn,
psEnc->sCmn.frame_length);
/*******************************************/
/* High-pass filtering of the input signal */
/*******************************************/
#if HIGH_PASS_INPUT
/* Variable high-pass filter */
SKP_Silk_HP_variable_cutoff_FIX(psEnc, &sEncCtrl, pIn_HP, pIn);
#else
SKP_memcpy(pIn_HP, pIn, psEnc->sCmn.frame_length * sizeof(int16_t));
#endif
#if SWITCH_TRANSITION_FILTERING
/* Ensure smooth bandwidth transitions */
SKP_Silk_LP_variable_cutoff(&psEnc->sCmn.sLP,
x_frame + psEnc->sCmn.la_shape, pIn_HP,
psEnc->sCmn.frame_length);
#else
SKP_memcpy(x_frame + psEnc->sCmn.la_shape, pIn_HP,
psEnc->sCmn.frame_length * sizeof(int16_t));
#endif
/*****************************************/
/* Find pitch lags, initial LPC analysis */
/*****************************************/
SKP_Silk_find_pitch_lags_FIX(psEnc, &sEncCtrl, res_pitch, x_frame);
/************************/
/* Noise shape analysis */
/************************/
SKP_Silk_noise_shape_analysis_FIX(psEnc, &sEncCtrl, res_pitch_frame,
x_frame);
/*****************************************/
/* Prefiltering for noise shaper */
/*****************************************/
SKP_Silk_prefilter_FIX(psEnc, &sEncCtrl, xfw, x_frame);
/***************************************************/
/* Find linear prediction coefficients (LPC + LTP) */
/***************************************************/
SKP_Silk_find_pred_coefs_FIX(psEnc, &sEncCtrl, res_pitch);
/****************************************/
/* Process gains */
/****************************************/
SKP_Silk_process_gains_FIX(psEnc, &sEncCtrl);
psEnc->sCmn.sigtype[psEnc->sCmn.nFramesInPayloadBuf] =
sEncCtrl.sCmn.sigtype;
psEnc->sCmn.QuantOffsetType[psEnc->sCmn.nFramesInPayloadBuf] =
sEncCtrl.sCmn.QuantOffsetType;
/****************************************/
/* Low Bitrate Redundant Encoding */
/****************************************/
nBytesLBRR = MAX_ARITHM_BYTES;
SKP_Silk_LBRR_encode_FIX(psEnc, &sEncCtrl, LBRRpayload, &nBytesLBRR,
xfw);
/*****************************************/
/* Noise shaping quantization */
/*****************************************/
psEnc->NoiseShapingQuantizer(&psEnc->sCmn, &sEncCtrl.sCmn, &psEnc->sNSQ,
xfw,
&psEnc->sCmn.q[psEnc->sCmn.
nFramesInPayloadBuf *
psEnc->sCmn.frame_length],
sEncCtrl.sCmn.NLSFInterpCoef_Q2,
sEncCtrl.PredCoef_Q12[0],
sEncCtrl.LTPCoef_Q14, sEncCtrl.AR2_Q13,
sEncCtrl.HarmShapeGain_Q14,
sEncCtrl.Tilt_Q14, sEncCtrl.LF_shp_Q14,
sEncCtrl.Gains_Q16, sEncCtrl.Lambda_Q10,
sEncCtrl.LTP_scale_Q14);
/**************************************************/
/* Convert speech activity into VAD and DTX flags */
/**************************************************/
if (psEnc->speech_activity_Q8 < SPEECH_ACTIVITY_DTX_THRES_Q8) {
psEnc->sCmn.vadFlag = NO_VOICE_ACTIVITY;
psEnc->sCmn.noSpeechCounter++;
if (psEnc->sCmn.noSpeechCounter > NO_SPEECH_FRAMES_BEFORE_DTX) {
psEnc->sCmn.inDTX = 1;
}
if (psEnc->sCmn.noSpeechCounter > MAX_CONSECUTIVE_DTX) {
psEnc->sCmn.noSpeechCounter = 0;
psEnc->sCmn.inDTX = 0;
}
} else {
psEnc->sCmn.noSpeechCounter = 0;
psEnc->sCmn.inDTX = 0;
psEnc->sCmn.vadFlag = VOICE_ACTIVITY;
}
/****************************************/
/* Initialize arithmetic coder */
/****************************************/
if (psEnc->sCmn.nFramesInPayloadBuf == 0) {
SKP_Silk_range_enc_init(&psEnc->sCmn.sRC);
psEnc->sCmn.nBytesInPayloadBuf = 0;
}
/****************************************/
/* Encode Parameters */
/****************************************/
if (psEnc->sCmn.bitstream_v == BIT_STREAM_V4) {
SKP_Silk_encode_parameters_v4(&psEnc->sCmn, &sEncCtrl.sCmn,
&psEnc->sCmn.sRC);
FrameTermination_CDF = SKP_Silk_FrameTermination_v4_CDF;
} else {
SKP_Silk_encode_parameters(&psEnc->sCmn, &sEncCtrl.sCmn,
&psEnc->sCmn.sRC,
&psEnc->sCmn.q[psEnc->sCmn.
nFramesInPayloadBuf *
psEnc->sCmn.
frame_length]);
FrameTermination_CDF = SKP_Silk_FrameTermination_CDF;
}
/****************************************/
/* Update Buffers and State */
/****************************************/
/* Update Input buffer */
SKP_memmove(psEnc->x_buf, &psEnc->x_buf[psEnc->sCmn.frame_length],
(psEnc->sCmn.frame_length +
psEnc->sCmn.la_shape) * sizeof(int16_t));
/* parameters needed for next frame */
psEnc->sCmn.prev_sigtype = sEncCtrl.sCmn.sigtype;
psEnc->sCmn.prevLag = sEncCtrl.sCmn.pitchL[NB_SUBFR - 1];
psEnc->sCmn.first_frame_after_reset = 0;
if (psEnc->sCmn.sRC.error) {
/* encoder returned error: clear payload buffer */
psEnc->sCmn.nFramesInPayloadBuf = 0;
} else {
psEnc->sCmn.nFramesInPayloadBuf++;
}
/****************************************/
/* finalize payload and copy to output */
/****************************************/
if (psEnc->sCmn.nFramesInPayloadBuf * FRAME_LENGTH_MS >=
psEnc->sCmn.PacketSize_ms) {
LBRR_idx = (psEnc->sCmn.oldest_LBRR_idx + 1) & LBRR_IDX_MASK;
/* Check if FEC information should be added */
frame_terminator = SKP_SILK_LAST_FRAME;
if (psEnc->sCmn.LBRR_buffer[LBRR_idx].usage ==
SKP_SILK_ADD_LBRR_TO_PLUS1) {
frame_terminator = SKP_SILK_LBRR_VER1;
}
if (psEnc->sCmn.LBRR_buffer[psEnc->sCmn.oldest_LBRR_idx].
usage == SKP_SILK_ADD_LBRR_TO_PLUS2) {
frame_terminator = SKP_SILK_LBRR_VER2;
LBRR_idx = psEnc->sCmn.oldest_LBRR_idx;
}
/* Add the frame termination info to stream */
SKP_Silk_range_encoder(&psEnc->sCmn.sRC, frame_terminator,
FrameTermination_CDF);
if (psEnc->sCmn.bitstream_v == BIT_STREAM_V4) {
/* Code excitation signal */
for (i = 0; i < psEnc->sCmn.nFramesInPayloadBuf; i++) {
SKP_Silk_encode_pulses(&psEnc->sCmn.sRC,
psEnc->sCmn.sigtype[i],
psEnc->sCmn.
QuantOffsetType[i],
&psEnc->sCmn.q[i *
psEnc->
sCmn.
frame_length],
psEnc->sCmn.
frame_length);
}
}
/* payload length so far */
SKP_Silk_range_coder_get_length(&psEnc->sCmn.sRC, &nBytes);
/* check that there is enough space in external output buffer, and move data */
if (*pnBytesOut >= nBytes) {
SKP_Silk_range_enc_wrap_up(&psEnc->sCmn.sRC);
SKP_memcpy(pCode, psEnc->sCmn.sRC.buffer,
nBytes * sizeof(uint8_t));
if (frame_terminator > SKP_SILK_MORE_FRAMES &&
*pnBytesOut >=
nBytes + psEnc->sCmn.LBRR_buffer[LBRR_idx].nBytes) {
/* Get old packet and add to payload. */
SKP_memcpy(&pCode[nBytes],
psEnc->sCmn.LBRR_buffer[LBRR_idx].
payload,
psEnc->sCmn.LBRR_buffer[LBRR_idx].
nBytes * sizeof(uint8_t));
nBytes +=
psEnc->sCmn.LBRR_buffer[LBRR_idx].nBytes;
}
*pnBytesOut = nBytes;
/* Update FEC buffer */
SKP_memcpy(psEnc->sCmn.
LBRR_buffer[psEnc->sCmn.oldest_LBRR_idx].
payload, LBRRpayload,
nBytesLBRR * sizeof(uint8_t));
psEnc->sCmn.LBRR_buffer[psEnc->sCmn.oldest_LBRR_idx].
nBytes = nBytesLBRR;
/* This line tells describes how FEC should be used */
psEnc->sCmn.LBRR_buffer[psEnc->sCmn.oldest_LBRR_idx].
usage = sEncCtrl.sCmn.LBRR_usage;
psEnc->sCmn.oldest_LBRR_idx =
(psEnc->sCmn.oldest_LBRR_idx + 1) & LBRR_IDX_MASK;
/* Reset number of frames in payload buffer */
psEnc->sCmn.nFramesInPayloadBuf = 0;
} else {
/* Not enough space: Payload will be discarded */
*pnBytesOut = 0;
nBytes = 0;
psEnc->sCmn.nFramesInPayloadBuf = 0;
ret = SKP_SILK_ENC_PAYLOAD_BUF_TOO_SHORT;
}
} else {
/* no payload for you this time */
*pnBytesOut = 0;
/* Encode that more frames follows */
frame_terminator = SKP_SILK_MORE_FRAMES;
SKP_Silk_range_encoder(&psEnc->sCmn.sRC, frame_terminator,
FrameTermination_CDF);
/* payload length so far */
SKP_Silk_range_coder_get_length(&psEnc->sCmn.sRC, &nBytes);
if (psEnc->sCmn.bitstream_v == BIT_STREAM_V4) {
/* Take into account the q signal that isnt in the bitstream yet */
nBytes += SKP_Silk_pulses_to_bytes(&psEnc->sCmn,
&psEnc->sCmn.
q[(psEnc->sCmn.
nFramesInPayloadBuf
-
1) *
psEnc->sCmn.
frame_length]);
}
}
/* Check for arithmetic coder errors */
if (psEnc->sCmn.sRC.error) {
ret = SKP_SILK_ENC_INTERNAL_ERROR;
}
/* simulate number of ms buffered in channel because of exceeding TargetRate */
assert((8 * 1000 *
((int64_t) nBytes -
(int64_t) psEnc->sCmn.nBytesInPayloadBuf)) ==
SKP_SAT32(8 * 1000 *
((int64_t) nBytes -
(int64_t) psEnc->sCmn.nBytesInPayloadBuf)));
assert(psEnc->sCmn.TargetRate_bps > 0);
psEnc->BufferedInChannel_ms +=
SKP_DIV32(8 * 1000 * (nBytes - psEnc->sCmn.nBytesInPayloadBuf),
psEnc->sCmn.TargetRate_bps);
psEnc->BufferedInChannel_ms -= FRAME_LENGTH_MS;
psEnc->BufferedInChannel_ms =
SKP_LIMIT(psEnc->BufferedInChannel_ms, 0, 100);
psEnc->sCmn.nBytesInPayloadBuf = nBytes;
if (psEnc->speech_activity_Q8 > WB_DETECT_ACTIVE_SPEECH_LEVEL_THRES_Q8) {
psEnc->sCmn.sSWBdetect.ActiveSpeech_ms =
SKP_ADD_POS_SAT32(psEnc->sCmn.sSWBdetect.ActiveSpeech_ms,
FRAME_LENGTH_MS);
}
return (ret);
}
/* Low BitRate Redundancy encoding functionality. Reuse all parameters but encode residual with lower bitrate */
void SKP_Silk_LBRR_encode_FIX(SKP_Silk_encoder_state_FIX * psEnc, /* I/O Pointer to Silk encoder state */
SKP_Silk_encoder_control_FIX * psEncCtrl, /* I/O Pointer to Silk encoder control struct */
uint8_t * pCode, /* O Pointer to payload */
int16_t * pnBytesOut, /* I/O Pointer to number of payload bytes */
int16_t xfw[] /* I Input signal */
)
{
int i, TempGainsIndices[NB_SUBFR], frame_terminator;
int nBytes, nFramesInPayloadBuf;
int32_t TempGains_Q16[NB_SUBFR];
int typeOffset, LTP_scaleIndex, Rate_only_parameters = 0;
/*******************************************/
/* Control use of inband LBRR */
/*******************************************/
SKP_Silk_LBRR_ctrl_FIX(psEnc, psEncCtrl);
if (psEnc->sCmn.LBRR_enabled) {
/* Save original Gains */
SKP_memcpy(TempGainsIndices, psEncCtrl->sCmn.GainsIndices,
NB_SUBFR * sizeof(int));
SKP_memcpy(TempGains_Q16, psEncCtrl->Gains_Q16,
NB_SUBFR * sizeof(int32_t));
typeOffset = psEnc->sCmn.typeOffsetPrev; // Temp save as cannot be overwritten
LTP_scaleIndex = psEncCtrl->sCmn.LTP_scaleIndex;
/* Set max rate where quant signal is encoded */
if (psEnc->sCmn.fs_kHz == 8) {
Rate_only_parameters = 13500;
} else if (psEnc->sCmn.fs_kHz == 12) {
Rate_only_parameters = 15500;
} else if (psEnc->sCmn.fs_kHz == 16) {
Rate_only_parameters = 17500;
} else if (psEnc->sCmn.fs_kHz == 24) {
Rate_only_parameters = 19500;
} else {
assert(0);
}
if (psEnc->sCmn.Complexity > 0
&& psEnc->sCmn.TargetRate_bps > Rate_only_parameters) {
if (psEnc->sCmn.nFramesInPayloadBuf == 0) {
/* First frame in packet copy Everything */
SKP_memcpy(&psEnc->sNSQ_LBRR, &psEnc->sNSQ,
sizeof(SKP_Silk_nsq_state));
psEnc->sCmn.LBRRprevLastGainIndex =
psEnc->sShape.LastGainIndex;
/* Increase Gains to get target LBRR rate */
psEncCtrl->sCmn.GainsIndices[0] =
psEncCtrl->sCmn.GainsIndices[0] +
psEnc->sCmn.LBRR_GainIncreases;
psEncCtrl->sCmn.GainsIndices[0] =
SKP_LIMIT(psEncCtrl->sCmn.GainsIndices[0],
0, N_LEVELS_QGAIN - 1);
}
/* Decode to get Gains in sync with decoder */
/* Overwrite unquantized gains with quantized gains */
SKP_Silk_gains_dequant(psEncCtrl->Gains_Q16,
psEncCtrl->sCmn.GainsIndices,
&psEnc->sCmn.
LBRRprevLastGainIndex,
psEnc->sCmn.nFramesInPayloadBuf);
/*****************************************/
/* Noise shaping quantization */
/*****************************************/
psEnc->NoiseShapingQuantizer(&psEnc->sCmn,
&psEncCtrl->sCmn,
&psEnc->sNSQ_LBRR, xfw,
&psEnc->sCmn.q_LBRR[psEnc->
sCmn.
nFramesInPayloadBuf
*
psEnc->
sCmn.
frame_length],
psEncCtrl->sCmn.
NLSFInterpCoef_Q2,
psEncCtrl->PredCoef_Q12[0],
psEncCtrl->LTPCoef_Q14,
psEncCtrl->AR2_Q13,
psEncCtrl->
HarmShapeGain_Q14,
psEncCtrl->Tilt_Q14,
psEncCtrl->LF_shp_Q14,
psEncCtrl->Gains_Q16,
psEncCtrl->Lambda_Q10,
psEncCtrl->LTP_scale_Q14);
} else {
SKP_memset(&psEnc->sCmn.
q_LBRR[psEnc->sCmn.nFramesInPayloadBuf *
psEnc->sCmn.frame_length], 0,
psEnc->sCmn.frame_length * sizeof(int));
psEncCtrl->sCmn.LTP_scaleIndex = 0;
}
/****************************************/
/* Initialize arithmetic coder */
/****************************************/
if (psEnc->sCmn.nFramesInPayloadBuf == 0) {
SKP_Silk_range_enc_init(&psEnc->sCmn.sRC_LBRR);
psEnc->sCmn.nBytesInPayloadBuf = 0;
}
/****************************************/
/* Encode Parameters */
/****************************************/
if (psEnc->sCmn.bitstream_v == BIT_STREAM_V4) {
SKP_Silk_encode_parameters_v4(&psEnc->sCmn,
&psEncCtrl->sCmn,
&psEnc->sCmn.sRC_LBRR);
} else {
SKP_Silk_encode_parameters(&psEnc->sCmn,
&psEncCtrl->sCmn,
&psEnc->sCmn.sRC_LBRR,
&psEnc->sCmn.q_LBRR[psEnc->
sCmn.
nFramesInPayloadBuf
*
psEnc->
sCmn.
frame_length]);
}
if (psEnc->sCmn.sRC_LBRR.error) {
/* encoder returned error: clear payload buffer */
nFramesInPayloadBuf = 0;
} else {
nFramesInPayloadBuf =
psEnc->sCmn.nFramesInPayloadBuf + 1;
}
/****************************************/
/* finalize payload and copy to output */
/****************************************/
if (SKP_SMULBB(nFramesInPayloadBuf, FRAME_LENGTH_MS) >=
psEnc->sCmn.PacketSize_ms) {
/* Check if FEC information should be added */
frame_terminator = SKP_SILK_LAST_FRAME;
/* Add the frame termination info to stream */
SKP_Silk_range_encoder(&psEnc->sCmn.sRC_LBRR,
frame_terminator,
SKP_Silk_FrameTermination_CDF);
if (psEnc->sCmn.bitstream_v == BIT_STREAM_V4) {
/*********************************************/
/* Encode quantization indices of excitation */
/*********************************************/
for (i = 0; i < nFramesInPayloadBuf; i++) {
SKP_Silk_encode_pulses(&psEnc->sCmn.
sRC_LBRR,
psEnc->sCmn.
sigtype[i],
psEnc->sCmn.
QuantOffsetType
[i],
&psEnc->sCmn.
q_LBRR[i *
psEnc->
sCmn.
frame_length],
psEnc->sCmn.
frame_length);
}
}
/* payload length so far */
SKP_Silk_range_coder_get_length(&psEnc->sCmn.sRC_LBRR,
&nBytes);
/* check that there is enough space in external output buffer, and move data */
if (*pnBytesOut >= nBytes) {
SKP_Silk_range_enc_wrap_up(&psEnc->sCmn.
sRC_LBRR);
SKP_memcpy(pCode, psEnc->sCmn.sRC_LBRR.buffer,
nBytes * sizeof(uint8_t));
*pnBytesOut = nBytes;
} else {
/* not enough space: payload will be discarded */
*pnBytesOut = 0;
assert(0);
}
} else {
/* no payload for you this time */
*pnBytesOut = 0;
/* Encode that more frames follows */
frame_terminator = SKP_SILK_MORE_FRAMES;
SKP_Silk_range_encoder(&psEnc->sCmn.sRC_LBRR,
frame_terminator,
SKP_Silk_FrameTermination_CDF);
}
/* Restore original Gains */
SKP_memcpy(psEncCtrl->sCmn.GainsIndices, TempGainsIndices,
NB_SUBFR * sizeof(int));
SKP_memcpy(psEncCtrl->Gains_Q16, TempGains_Q16,
NB_SUBFR * sizeof(int32_t));
/* Restore LTP scale index and typeoffset */
psEncCtrl->sCmn.LTP_scaleIndex = LTP_scaleIndex;
psEnc->sCmn.typeOffsetPrev = typeOffset;
}
}
void SKP_Silk_encode_parameters(
SKP_Silk_encoder_state *psEncC, /* I/O Encoder state */
SKP_Silk_encoder_control *psEncCtrlC, /* I/O Encoder control */
SKP_Silk_range_coder_state *psRC, /* I/O Range encoder state */
const SKP_int8 *q /* I Quantization indices */
)
{
SKP_int i, k, typeOffset;
const SKP_Silk_NLSF_CB_struct *psNLSF_CB;
/************************/
/* Encode sampling rate */
/************************/
/* only done for first frame in packet */
if( psEncC->nFramesInPayloadBuf == 0 ) {
/* get sampling rate index */
for( i = 0; i < 3; i++ ) {
if( SKP_Silk_SamplingRates_table[ i ] == psEncC->fs_kHz ) {
break;
}
}
SKP_Silk_range_encoder( psRC, i, SKP_Silk_SamplingRates_CDF );
}
/*******************************************/
/* Encode signal type and quantizer offset */
/*******************************************/
typeOffset = 2 * psEncCtrlC->sigtype + psEncCtrlC->QuantOffsetType;
if( psEncC->nFramesInPayloadBuf == 0 ) {
/* first frame in packet: independent coding */
SKP_Silk_range_encoder( psRC, typeOffset, SKP_Silk_type_offset_CDF );
} else {
/* condidtional coding */
SKP_Silk_range_encoder( psRC, typeOffset, SKP_Silk_type_offset_joint_CDF[ psEncC->typeOffsetPrev ] );
}
psEncC->typeOffsetPrev = typeOffset;
/****************/
/* Encode gains */
/****************/
/* first subframe */
if( psEncC->nFramesInPayloadBuf == 0 ) {
/* first frame in packet: independent coding */
SKP_Silk_range_encoder( psRC, psEncCtrlC->GainsIndices[ 0 ], SKP_Silk_gain_CDF[ psEncCtrlC->sigtype ] );
} else {
/* condidtional coding */
SKP_Silk_range_encoder( psRC, psEncCtrlC->GainsIndices[ 0 ], SKP_Silk_delta_gain_CDF );
}
/* remaining subframes */
for( i = 1; i < NB_SUBFR; i++ ) {
SKP_Silk_range_encoder( psRC, psEncCtrlC->GainsIndices[ i ], SKP_Silk_delta_gain_CDF );
}
/****************/
/* Encode NLSFs */
/****************/
/* Range encoding of the NLSF path */
psNLSF_CB = psEncC->psNLSF_CB[ psEncCtrlC->sigtype ];
SKP_Silk_range_encoder_multi( psRC, psEncCtrlC->NLSFIndices, psNLSF_CB->StartPtr, psNLSF_CB->nStages );
/* Encode NLSF interpolation factor */
SKP_assert( psEncC->useInterpolatedNLSFs == 1 || psEncCtrlC->NLSFInterpCoef_Q2 == ( 1 << 2 ) );
SKP_Silk_range_encoder( psRC, psEncCtrlC->NLSFInterpCoef_Q2, SKP_Silk_NLSF_interpolation_factor_CDF );
if( psEncCtrlC->sigtype == SIG_TYPE_VOICED ) {
/*********************/
/* Encode pitch lags */
/*********************/
/* lag index */
if( psEncC->fs_kHz == 8 ) {
SKP_Silk_range_encoder( psRC, psEncCtrlC->lagIndex, SKP_Silk_pitch_lag_NB_CDF );
} else if( psEncC->fs_kHz == 12 ) {
SKP_Silk_range_encoder( psRC, psEncCtrlC->lagIndex, SKP_Silk_pitch_lag_MB_CDF );
} else if( psEncC->fs_kHz == 16 ) {
SKP_Silk_range_encoder( psRC, psEncCtrlC->lagIndex, SKP_Silk_pitch_lag_WB_CDF );
} else {
SKP_Silk_range_encoder( psRC, psEncCtrlC->lagIndex, SKP_Silk_pitch_lag_SWB_CDF );
}
/* countour index */
if( psEncC->fs_kHz == 8 ) {
/* Less codevectors used in 8 khz mode */
SKP_Silk_range_encoder( psRC, psEncCtrlC->contourIndex, SKP_Silk_pitch_contour_NB_CDF );
} else {
/* Joint for 12, 16, 24 khz */
SKP_Silk_range_encoder( psRC, psEncCtrlC->contourIndex, SKP_Silk_pitch_contour_CDF );
}
/********************/
/* Encode LTP gains */
/********************/
/* PERIndex value */
SKP_Silk_range_encoder( psRC, psEncCtrlC->PERIndex, SKP_Silk_LTP_per_index_CDF );
/* Codebook Indices */
for( k = 0; k < NB_SUBFR; k++ ) {
SKP_Silk_range_encoder( psRC, psEncCtrlC->LTPIndex[ k ], SKP_Silk_LTP_gain_CDF_ptrs[ psEncCtrlC->PERIndex ] );
}
/**********************/
/* Encode LTP scaling */
/**********************/
SKP_Silk_range_encoder( psRC, psEncCtrlC->LTP_scaleIndex, SKP_Silk_LTPscale_CDF );
}
/***************/
/* Encode seed */
/***************/
SKP_Silk_range_encoder( psRC, psEncCtrlC->Seed, SKP_Silk_Seed_CDF );
/*********************************************/
/* Encode quantization indices of excitation */
/*********************************************/
SKP_Silk_encode_pulses( psRC, psEncCtrlC->sigtype, psEncCtrlC->QuantOffsetType, q, psEncC->frame_length );
/*********************************************/
/* Encode VAD flag */
/*********************************************/
SKP_Silk_range_encoder( psRC, psEncC->vadFlag, SKP_Silk_vadflag_CDF );
}