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+#include "SKP_Silk_main.h"
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+
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+typedef struct {
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+ SKP_int RandState[ DECISION_DELAY ];
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+ SKP_int32 Q_Q10[ DECISION_DELAY ];
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+ SKP_int32 Xq_Q10[ DECISION_DELAY ];
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+ SKP_int32 Pred_Q16[ DECISION_DELAY ];
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+ SKP_int32 Shape_Q10[ DECISION_DELAY ];
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+ SKP_int32 Gain_Q16[ DECISION_DELAY ];
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+ SKP_int32 sLPC_Q14[ MAX_FRAME_LENGTH / NB_SUBFR + NSQ_LPC_BUF_LENGTH ];
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+ SKP_int32 LF_AR_Q12;
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+ SKP_int32 Seed;
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+ SKP_int32 SeedInit;
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+ SKP_int32 RD_Q10;
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+} NSQ_del_dec_struct;
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+
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+typedef struct {
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+ SKP_int32 Q_Q10;
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+ SKP_int32 RD_Q10;
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+ SKP_int32 xq_Q14;
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+ SKP_int32 LF_AR_Q12;
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+ SKP_int32 sLTP_shp_Q10;
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+ SKP_int32 LPC_exc_Q16;
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+} NSQ_sample_struct;
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+
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+SKP_INLINE void SKP_Silk_copy_del_dec_state(
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+ NSQ_del_dec_struct *DD_dst, /* I Dst del dec state */
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+ NSQ_del_dec_struct *DD_src, /* I Src del dec state */
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+ SKP_int LPC_state_idx /* I Index to LPC buffer */
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+);
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+
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+SKP_INLINE void SKP_Silk_nsq_del_dec_scale_states(
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+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
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+ NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */
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+ const SKP_int16 x[], /* I Input in Q0 */
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+ SKP_int32 x_sc_Q10[], /* O Input scaled with 1/Gain in Q10 */
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+ SKP_int length, /* I Length of input */
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+ SKP_int16 sLTP[], /* I Re-whitened LTP state in Q0 */
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+ SKP_int32 sLTP_Q16[], /* O LTP state matching scaled input */
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+ SKP_int subfr, /* I Subframe number */
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+ SKP_int nStatesDelayedDecision, /* I Number of del dec states */
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+ SKP_int smpl_buf_idx, /* I Index to newest samples in buffers */
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+ const SKP_int LTP_scale_Q14, /* I LTP state scaling */
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+ const SKP_int32 Gains_Q16[ NB_SUBFR ], /* I */
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+ const SKP_int pitchL[ NB_SUBFR ] /* I Pitch lag */
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+);
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+
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+/******************************************/
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+/* Noise shape quantizer for one subframe */
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+/******************************************/
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+SKP_INLINE void SKP_Silk_noise_shape_quantizer_del_dec(
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+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
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+ NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */
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+ SKP_int sigtype, /* I Signal type */
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+ const SKP_int32 x_Q10[], /* I */
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+ SKP_int q[], /* O */
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+ SKP_int16 xq[], /* O */
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+ SKP_int32 sLTP_Q16[], /* I/O LTP filter state */
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+ const SKP_int16 a_Q12[], /* I Short term prediction coefs */
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+ const SKP_int16 b_Q14[], /* I Long term prediction coefs */
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+ const SKP_int16 AR_shp_Q13[], /* I Noise shaping coefs */
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+ SKP_int lag, /* I Pitch lag */
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+ SKP_int32 HarmShapeFIRPacked_Q14, /* I */
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+ SKP_int Tilt_Q14, /* I Spectral tilt */
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+ SKP_int32 LF_shp_Q14, /* I */
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+ SKP_int32 Gain_Q16, /* I */
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+ SKP_int Lambda_Q10, /* I */
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+ SKP_int offset_Q10, /* I */
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+ SKP_int length, /* I Input length */
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+ SKP_int subfr, /* I Subframe number */
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+ SKP_int shapingLPCOrder, /* I Shaping LPC filter order */
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+ SKP_int predictLPCOrder, /* I Prediction LPC filter order */
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+ SKP_int nStatesDelayedDecision, /* I Number of states in decision tree */
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+ SKP_int *smpl_buf_idx, /* I Index to newest samples in buffers */
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+ SKP_int decisionDelay /* I */
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+);
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+
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+void SKP_Silk_NSQ_del_dec(
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+ SKP_Silk_encoder_state *psEncC, /* I/O Encoder State */
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+ SKP_Silk_encoder_control *psEncCtrlC, /* I Encoder Control */
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+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
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+ const SKP_int16 x[], /* I Prefiltered input signal */
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+ SKP_int q[], /* O Quantized pulse signal */
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+ const SKP_int LSFInterpFactor_Q2, /* I LSF interpolation factor in Q2 */
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+ const SKP_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Prediction coefs */
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+ const SKP_int16 LTPCoef_Q14[ LTP_ORDER * NB_SUBFR ], /* I LT prediction coefs */
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+ const SKP_int16 AR2_Q13[ NB_SUBFR * SHAPE_LPC_ORDER_MAX ], /* I */
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+ const SKP_int HarmShapeGain_Q14[ NB_SUBFR ], /* I */
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+ const SKP_int Tilt_Q14[ NB_SUBFR ], /* I Spectral tilt */
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+ const SKP_int32 LF_shp_Q14[ NB_SUBFR ], /* I */
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+ const SKP_int32 Gains_Q16[ NB_SUBFR ], /* I */
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+ const SKP_int Lambda_Q10, /* I */
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+ const SKP_int LTP_scale_Q14 /* I LTP state scaling */
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+)
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+{
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+ SKP_int i, k, lag, start_idx, LSF_interpolation_flag, Winner_ind, subfr;
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+ SKP_int last_smple_idx, smpl_buf_idx, decisionDelay, subfr_length;
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+ const SKP_int16 *A_Q12, *B_Q14, *AR_shp_Q13;
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+ SKP_int16 *pxq;
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+ SKP_int32 sLTP_Q16[ 2 * MAX_FRAME_LENGTH ];
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+ SKP_int16 sLTP[ 2 * MAX_FRAME_LENGTH ];
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+ SKP_int32 HarmShapeFIRPacked_Q14;
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+ SKP_int offset_Q10;
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+ SKP_int32 FiltState[ MAX_LPC_ORDER ], RDmin_Q10;
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+ SKP_int32 x_sc_Q10[ MAX_FRAME_LENGTH / NB_SUBFR ];
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+ NSQ_del_dec_struct psDelDec[ DEL_DEC_STATES_MAX ];
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+ NSQ_del_dec_struct *psDD;
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+
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+ subfr_length = psEncC->frame_length / NB_SUBFR;
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+
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+ /* Set unvoiced lag to the previous one, overwrite later for voiced */
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+ lag = NSQ->lagPrev;
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+
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+ SKP_assert( NSQ->prev_inv_gain_Q16 != 0 );
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+
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+ /* Initialize delayed decision states */
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+ SKP_memset( psDelDec, 0, psEncC->nStatesDelayedDecision * sizeof( NSQ_del_dec_struct ) );
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+ for( k = 0; k < psEncC->nStatesDelayedDecision; k++ ) {
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+ psDD = &psDelDec[ k ];
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+ psDD->Seed = ( k + psEncCtrlC->Seed ) & 3;
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+ psDD->SeedInit = psDD->Seed;
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+ psDD->RD_Q10 = 0;
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+ psDD->LF_AR_Q12 = NSQ->sLF_AR_shp_Q12;
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+ psDD->Shape_Q10[ 0 ] = NSQ->sLTP_shp_Q10[ psEncC->frame_length - 1 ];
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+ SKP_memcpy( psDD->sLPC_Q14, NSQ->sLPC_Q14, NSQ_LPC_BUF_LENGTH * sizeof( SKP_int32 ) );
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+ }
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+
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+ offset_Q10 = SKP_Silk_Quantization_Offsets_Q10[ psEncCtrlC->sigtype ][ psEncCtrlC->QuantOffsetType ];
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+ smpl_buf_idx = 0; /* index of oldest samples */
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+
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+ decisionDelay = SKP_min_int( DECISION_DELAY, subfr_length );
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+ /* For voiced frames limit the decision delay to lower than the pitch lag */
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+ if( psEncCtrlC->sigtype == SIG_TYPE_VOICED ) {
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+ for( k = 0; k < NB_SUBFR; k++ ) {
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+ decisionDelay = SKP_min_int( decisionDelay, psEncCtrlC->pitchL[ k ] - LTP_ORDER / 2 - 1 );
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+ }
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+ }
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+
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+ if( LSFInterpFactor_Q2 == ( 1 << 2 ) ) {
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+ LSF_interpolation_flag = 0;
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+ } else {
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+ LSF_interpolation_flag = 1;
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+ }
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+
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+ /* Setup pointers to start of sub frame */
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+ pxq = &NSQ->xq[ psEncC->frame_length ];
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+ NSQ->sLTP_shp_buf_idx = psEncC->frame_length;
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+ NSQ->sLTP_buf_idx = psEncC->frame_length;
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+ subfr = 0;
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+ for( k = 0; k < NB_SUBFR; k++ ) {
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+ A_Q12 = &PredCoef_Q12[ ( ( k >> 1 ) | ( 1 - LSF_interpolation_flag ) ) * MAX_LPC_ORDER ];
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+ B_Q14 = <PCoef_Q14[ k * LTP_ORDER ];
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+ AR_shp_Q13 = &AR2_Q13[ k * SHAPE_LPC_ORDER_MAX ];
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+
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+ NSQ->rewhite_flag = 0;
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+ if( psEncCtrlC->sigtype == SIG_TYPE_VOICED ) {
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+ /* Voiced */
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+ lag = psEncCtrlC->pitchL[ k ];
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+
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+ /* Re-whitening */
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+ if( ( k & ( 3 - SKP_LSHIFT( LSF_interpolation_flag, 1 ) ) ) == 0 ) {
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+ if( k == 2 ) {
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+ /* RESET DELAYED DECISIONS */
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+ /* Find winner */
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+ RDmin_Q10 = psDelDec[ 0 ].RD_Q10;
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+ Winner_ind = 0;
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+ for( i = 1; i < psEncC->nStatesDelayedDecision; i++ ) {
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+ if( psDelDec[ i ].RD_Q10 < RDmin_Q10 ) {
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+ RDmin_Q10 = psDelDec[ i ].RD_Q10;
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+ Winner_ind = i;
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+ }
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+ }
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+ for( i = 0; i < psEncC->nStatesDelayedDecision; i++ ) {
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+ if( i != Winner_ind ) {
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+ psDelDec[ i ].RD_Q10 += ( SKP_int32_MAX >> 4 );
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+ SKP_assert( psDelDec[ i ].RD_Q10 >= 0 );
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+ }
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+ }
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+
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+ /* Copy final part of signals from winner state to output and long-term filter states */
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+ psDD = &psDelDec[ Winner_ind ];
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+ last_smple_idx = smpl_buf_idx + decisionDelay;
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+ for( i = 0; i < decisionDelay; i++ ) {
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+ last_smple_idx = ( last_smple_idx - 1 ) & DECISION_DELAY_MASK;
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+ q[ i - decisionDelay ] = ( SKP_int )SKP_RSHIFT( psDD->Q_Q10[ last_smple_idx ], 10 );
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+ pxq[ i - decisionDelay ] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT_ROUND(
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+ SKP_SMULWW( psDD->Xq_Q10[ last_smple_idx ],
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+ psDD->Gain_Q16[ last_smple_idx ] ), 10 ) );
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+ NSQ->sLTP_shp_Q10[ NSQ->sLTP_shp_buf_idx - decisionDelay + i ] = psDD->Shape_Q10[ last_smple_idx ];
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+ }
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+
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+ subfr = 0;
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+ }
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+
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+ /* Rewhiten with new A coefs */
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+ start_idx = psEncC->frame_length - lag - psEncC->predictLPCOrder - LTP_ORDER / 2;
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+ start_idx = SKP_LIMIT( start_idx, 0, psEncC->frame_length - psEncC->predictLPCOrder );
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+
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+ SKP_memset( FiltState, 0, psEncC->predictLPCOrder * sizeof( SKP_int32 ) );
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+ SKP_Silk_MA_Prediction( &NSQ->xq[ start_idx + k * psEncC->subfr_length ],
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+ A_Q12, FiltState, sLTP + start_idx, psEncC->frame_length - start_idx, psEncC->predictLPCOrder );
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+
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+ NSQ->sLTP_buf_idx = psEncC->frame_length;
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+ NSQ->rewhite_flag = 1;
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+ }
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+ }
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+
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+ /* Noise shape parameters */
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+ SKP_assert( HarmShapeGain_Q14[ k ] >= 0 );
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+ HarmShapeFIRPacked_Q14 = SKP_RSHIFT( HarmShapeGain_Q14[ k ], 2 );
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+ HarmShapeFIRPacked_Q14 |= SKP_LSHIFT( ( SKP_int32 )SKP_RSHIFT( HarmShapeGain_Q14[ k ], 1 ), 16 );
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+
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+ SKP_Silk_nsq_del_dec_scale_states( NSQ, psDelDec, x, x_sc_Q10,
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+ subfr_length, sLTP, sLTP_Q16, k, psEncC->nStatesDelayedDecision, smpl_buf_idx,
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+ LTP_scale_Q14, Gains_Q16, psEncCtrlC->pitchL );
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+
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+ SKP_Silk_noise_shape_quantizer_del_dec( NSQ, psDelDec, psEncCtrlC->sigtype, x_sc_Q10, q, pxq, sLTP_Q16,
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+ A_Q12, B_Q14, AR_shp_Q13, lag, HarmShapeFIRPacked_Q14, Tilt_Q14[ k ], LF_shp_Q14[ k ], Gains_Q16[ k ],
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+ Lambda_Q10, offset_Q10, psEncC->subfr_length, subfr++, psEncC->shapingLPCOrder, psEncC->predictLPCOrder,
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+ psEncC->nStatesDelayedDecision, &smpl_buf_idx, decisionDelay
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+ );
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+
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+ x += psEncC->subfr_length;
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+ q += psEncC->subfr_length;
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+ pxq += psEncC->subfr_length;
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+ }
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+
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+ /* Find winner */
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+ RDmin_Q10 = psDelDec[ 0 ].RD_Q10;
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+ Winner_ind = 0;
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+ for( k = 1; k < psEncC->nStatesDelayedDecision; k++ ) {
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+ if( psDelDec[ k ].RD_Q10 < RDmin_Q10 ) {
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+ RDmin_Q10 = psDelDec[ k ].RD_Q10;
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+ Winner_ind = k;
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+ }
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+ }
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+
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+ /* Copy final part of signals from winner state to output and long-term filter states */
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+ psDD = &psDelDec[ Winner_ind ];
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+ psEncCtrlC->Seed = psDD->SeedInit;
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+ last_smple_idx = smpl_buf_idx + decisionDelay;
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+ for( i = 0; i < decisionDelay; i++ ) {
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+ last_smple_idx = ( last_smple_idx - 1 ) & DECISION_DELAY_MASK;
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+ q[ i - decisionDelay ] = ( SKP_int )SKP_RSHIFT( psDD->Q_Q10[ last_smple_idx ], 10 );
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+ pxq[ i - decisionDelay ] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT_ROUND(
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246
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+ SKP_SMULWW( psDD->Xq_Q10[ last_smple_idx ], psDD->Gain_Q16[ last_smple_idx ] ), 10 ) );
|
|
|
247
|
+ NSQ->sLTP_shp_Q10[ NSQ->sLTP_shp_buf_idx - decisionDelay + i ] = psDD->Shape_Q10[ last_smple_idx ];
|
|
|
248
|
+ sLTP_Q16[ NSQ->sLTP_buf_idx - decisionDelay + i ] = psDD->Pred_Q16[ last_smple_idx ];
|
|
|
249
|
+
|
|
|
250
|
+ }
|
|
|
251
|
+ SKP_memcpy( NSQ->sLPC_Q14, &psDD->sLPC_Q14[ psEncC->subfr_length ], NSQ_LPC_BUF_LENGTH * sizeof( SKP_int32 ) );
|
|
|
252
|
+
|
|
|
253
|
+ /* Update states */
|
|
|
254
|
+ NSQ->sLF_AR_shp_Q12 = psDD->LF_AR_Q12;
|
|
|
255
|
+ NSQ->prev_inv_gain_Q16 = NSQ->prev_inv_gain_Q16;
|
|
|
256
|
+ NSQ->lagPrev = psEncCtrlC->pitchL[ NB_SUBFR - 1 ];
|
|
|
257
|
+
|
|
|
258
|
+ /* Save quantized speech and noise shaping signals */
|
|
|
259
|
+ SKP_memcpy( NSQ->xq, &NSQ->xq[ psEncC->frame_length ], psEncC->frame_length * sizeof( SKP_int16 ) );
|
|
|
260
|
+ SKP_memcpy( NSQ->sLTP_shp_Q10, &NSQ->sLTP_shp_Q10[ psEncC->frame_length ], psEncC->frame_length * sizeof( SKP_int32 ) );
|
|
|
261
|
+
|
|
|
262
|
+}
|
|
|
263
|
+
|
|
|
264
|
+/******************************************/
|
|
|
265
|
+/* Noise shape quantizer for one subframe */
|
|
|
266
|
+/******************************************/
|
|
|
267
|
+SKP_INLINE void SKP_Silk_noise_shape_quantizer_del_dec(
|
|
|
268
|
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
|
|
|
269
|
+ NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */
|
|
|
270
|
+ SKP_int sigtype, /* I Signal type */
|
|
|
271
|
+ const SKP_int32 x_Q10[], /* I */
|
|
|
272
|
+ SKP_int q[], /* O */
|
|
|
273
|
+ SKP_int16 xq[], /* O */
|
|
|
274
|
+ SKP_int32 sLTP_Q16[], /* I/O LTP filter state */
|
|
|
275
|
+ const SKP_int16 a_Q12[], /* I Short term prediction coefs */
|
|
|
276
|
+ const SKP_int16 b_Q14[], /* I Long term prediction coefs */
|
|
|
277
|
+ const SKP_int16 AR_shp_Q13[], /* I Noise shaping coefs */
|
|
|
278
|
+ SKP_int lag, /* I Pitch lag */
|
|
|
279
|
+ SKP_int32 HarmShapeFIRPacked_Q14, /* I */
|
|
|
280
|
+ SKP_int Tilt_Q14, /* I Spectral tilt */
|
|
|
281
|
+ SKP_int32 LF_shp_Q14, /* I */
|
|
|
282
|
+ SKP_int32 Gain_Q16, /* I */
|
|
|
283
|
+ SKP_int Lambda_Q10, /* I */
|
|
|
284
|
+ SKP_int offset_Q10, /* I */
|
|
|
285
|
+ SKP_int length, /* I Input length */
|
|
|
286
|
+ SKP_int subfr, /* I Subframe number */
|
|
|
287
|
+ SKP_int shapingLPCOrder, /* I Shaping LPC filter order */
|
|
|
288
|
+ SKP_int predictLPCOrder, /* I Prediction LPC filter order */
|
|
|
289
|
+ SKP_int nStatesDelayedDecision, /* I Number of states in decision tree */
|
|
|
290
|
+ SKP_int *smpl_buf_idx, /* I Index to newest samples in buffers */
|
|
|
291
|
+ SKP_int decisionDelay /* I */
|
|
|
292
|
+)
|
|
|
293
|
+{
|
|
|
294
|
+ SKP_int i, j, k, Winner_ind, RDmin_ind, RDmax_ind, last_smple_idx;
|
|
|
295
|
+ SKP_int32 Winner_rand_state;
|
|
|
296
|
+ SKP_int32 LTP_pred_Q14, LPC_pred_Q10, n_AR_Q10, n_LTP_Q14;
|
|
|
297
|
+ SKP_int32 n_LF_Q10;
|
|
|
298
|
+ SKP_int32 r_Q10, rr_Q20, rd1_Q10, rd2_Q10, RDmin_Q10, RDmax_Q10;
|
|
|
299
|
+ SKP_int32 q1_Q10, q2_Q10;
|
|
|
300
|
+ SKP_int32 Atmp, dither;
|
|
|
301
|
+ SKP_int32 exc_Q10, LPC_exc_Q10, xq_Q10;
|
|
|
302
|
+ SKP_int32 tmp, sLF_AR_shp_Q10;
|
|
|
303
|
+ SKP_int32 *pred_lag_ptr, *shp_lag_ptr;
|
|
|
304
|
+ SKP_int32 *psLPC_Q14;
|
|
|
305
|
+ SKP_int32 a_Q12_tmp[ MAX_LPC_ORDER / 2 ], AR_shp_Q13_tmp[ MAX_LPC_ORDER / 2 ];
|
|
|
306
|
+ NSQ_sample_struct psSampleState[ DEL_DEC_STATES_MAX ][ 2 ];
|
|
|
307
|
+ NSQ_del_dec_struct *psDD;
|
|
|
308
|
+ NSQ_sample_struct *psSS;
|
|
|
309
|
+
|
|
|
310
|
+ shp_lag_ptr = &NSQ->sLTP_shp_Q10[ NSQ->sLTP_shp_buf_idx - lag + HARM_SHAPE_FIR_TAPS / 2 ];
|
|
|
311
|
+ pred_lag_ptr = &sLTP_Q16[ NSQ->sLTP_buf_idx - lag + LTP_ORDER / 2 ];
|
|
|
312
|
+
|
|
|
313
|
+ /* Preload LPC coeficients to array on stack. Gives small performance gain */
|
|
|
314
|
+ SKP_memcpy( a_Q12_tmp, a_Q12, predictLPCOrder * sizeof( SKP_int16 ) );
|
|
|
315
|
+ SKP_memcpy( AR_shp_Q13_tmp, AR_shp_Q13, shapingLPCOrder * sizeof( SKP_int16 ) );
|
|
|
316
|
+
|
|
|
317
|
+ for( i = 0; i < length; i++ ) {
|
|
|
318
|
+ /* Perform common calculations used in all states */
|
|
|
319
|
+
|
|
|
320
|
+ /* Long-term prediction */
|
|
|
321
|
+ if( sigtype == SIG_TYPE_VOICED ) {
|
|
|
322
|
+ /* Unrolled loop */
|
|
|
323
|
+ LTP_pred_Q14 = SKP_SMULWB( pred_lag_ptr[ 0 ], b_Q14[ 0 ] );
|
|
|
324
|
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -1 ], b_Q14[ 1 ] );
|
|
|
325
|
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -2 ], b_Q14[ 2 ] );
|
|
|
326
|
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -3 ], b_Q14[ 3 ] );
|
|
|
327
|
+ LTP_pred_Q14 = SKP_SMLAWB( LTP_pred_Q14, pred_lag_ptr[ -4 ], b_Q14[ 4 ] );
|
|
|
328
|
+ pred_lag_ptr++;
|
|
|
329
|
+ } else {
|
|
|
330
|
+ LTP_pred_Q14 = 0;
|
|
|
331
|
+ }
|
|
|
332
|
+
|
|
|
333
|
+ /* Long-term shaping */
|
|
|
334
|
+ if( lag > 0 ) {
|
|
|
335
|
+ /* Symmetric, packed FIR coefficients */
|
|
|
336
|
+ n_LTP_Q14 = SKP_SMULWB( SKP_ADD32( shp_lag_ptr[ 0 ], shp_lag_ptr[ -2 ] ), HarmShapeFIRPacked_Q14 );
|
|
|
337
|
+ n_LTP_Q14 = SKP_SMLAWT( n_LTP_Q14, shp_lag_ptr[ -1 ], HarmShapeFIRPacked_Q14 );
|
|
|
338
|
+ n_LTP_Q14 = SKP_LSHIFT( n_LTP_Q14, 6 );
|
|
|
339
|
+ shp_lag_ptr++;
|
|
|
340
|
+ } else {
|
|
|
341
|
+ n_LTP_Q14 = 0;
|
|
|
342
|
+ }
|
|
|
343
|
+
|
|
|
344
|
+ for( k = 0; k < nStatesDelayedDecision; k++ ) {
|
|
|
345
|
+ /* Delayed decision state */
|
|
|
346
|
+ psDD = &psDelDec[ k ];
|
|
|
347
|
+
|
|
|
348
|
+ /* Sample state */
|
|
|
349
|
+ psSS = psSampleState[ k ];
|
|
|
350
|
+
|
|
|
351
|
+ /* Generate dither */
|
|
|
352
|
+ psDD->Seed = SKP_RAND( psDD->Seed );
|
|
|
353
|
+
|
|
|
354
|
+ /* dither = rand_seed < 0 ? 0xFFFFFFFF : 0; */
|
|
|
355
|
+ dither = SKP_RSHIFT( psDD->Seed, 31 );
|
|
|
356
|
+
|
|
|
357
|
+ /* Pointer used in short term prediction and shaping */
|
|
|
358
|
+ psLPC_Q14 = &psDD->sLPC_Q14[ NSQ_LPC_BUF_LENGTH - 1 + i ];
|
|
|
359
|
+ /* Short-term prediction */
|
|
|
360
|
+ SKP_assert( ( predictLPCOrder & 1 ) == 0 ); /* check that order is even */
|
|
|
361
|
+ SKP_assert( ( (SKP_int64)a_Q12 & 3 ) == 0 ); /* check that array starts at 4-byte aligned address */
|
|
|
362
|
+ SKP_assert( predictLPCOrder >= 10 ); /* check that unrolling works */
|
|
|
363
|
+
|
|
|
364
|
+ /* Partially unrolled */
|
|
|
365
|
+ Atmp = a_Q12_tmp[ 0 ]; /* read two coefficients at once */
|
|
|
366
|
+ LPC_pred_Q10 = SKP_SMULWB( psLPC_Q14[ 0 ], Atmp );
|
|
|
367
|
+ LPC_pred_Q10 = SKP_SMLAWT( LPC_pred_Q10, psLPC_Q14[ -1 ], Atmp );
|
|
|
368
|
+ Atmp = a_Q12_tmp[ 1 ];
|
|
|
369
|
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -2 ], Atmp );
|
|
|
370
|
+ LPC_pred_Q10 = SKP_SMLAWT( LPC_pred_Q10, psLPC_Q14[ -3 ], Atmp );
|
|
|
371
|
+ Atmp = a_Q12_tmp[ 2 ];
|
|
|
372
|
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -4 ], Atmp );
|
|
|
373
|
+ LPC_pred_Q10 = SKP_SMLAWT( LPC_pred_Q10, psLPC_Q14[ -5 ], Atmp );
|
|
|
374
|
+ Atmp = a_Q12_tmp[ 3 ];
|
|
|
375
|
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -6 ], Atmp );
|
|
|
376
|
+ LPC_pred_Q10 = SKP_SMLAWT( LPC_pred_Q10, psLPC_Q14[ -7 ], Atmp );
|
|
|
377
|
+ Atmp = a_Q12_tmp[ 4 ];
|
|
|
378
|
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -8 ], Atmp );
|
|
|
379
|
+ LPC_pred_Q10 = SKP_SMLAWT( LPC_pred_Q10, psLPC_Q14[ -9 ], Atmp );
|
|
|
380
|
+ for( j = 10; j < predictLPCOrder; j += 2 ) {
|
|
|
381
|
+ Atmp = a_Q12_tmp[ j >> 1 ]; /* read two coefficients at once */
|
|
|
382
|
+ LPC_pred_Q10 = SKP_SMLAWB( LPC_pred_Q10, psLPC_Q14[ -j ], Atmp );
|
|
|
383
|
+ LPC_pred_Q10 = SKP_SMLAWT( LPC_pred_Q10, psLPC_Q14[ -j - 1 ], Atmp );
|
|
|
384
|
+ }
|
|
|
385
|
+
|
|
|
386
|
+ /* Noise shape feedback */
|
|
|
387
|
+ SKP_assert( ( shapingLPCOrder & 1 ) == 0 ); /* check that order is even */
|
|
|
388
|
+ SKP_assert( ( (SKP_int64)AR_shp_Q13 & 3 ) == 0 ); /* check that array starts at 4-byte aligned address */
|
|
|
389
|
+ SKP_assert( shapingLPCOrder >= 12 ); /* check that unrolling works */
|
|
|
390
|
+ /* NOTE: the code below loads two int16 values in an int32, and multiplies each using the */
|
|
|
391
|
+ /* SMLAWB and SMLAWT instructions. On a big-endian CPU the two int16 variables would be */
|
|
|
392
|
+ /* loaded in reverse order and the code will give the wrong result. In that case swapping */
|
|
|
393
|
+ /* the SMLAWB and SMLAWT instructions should solve the problem. */
|
|
|
394
|
+
|
|
|
395
|
+ /* Partially unrolled */
|
|
|
396
|
+ Atmp = AR_shp_Q13_tmp[ 0 ]; /* read two coefficients at once */
|
|
|
397
|
+ n_AR_Q10 = SKP_SMULWB( psLPC_Q14[ 0 ], Atmp );
|
|
|
398
|
+ n_AR_Q10 = SKP_SMLAWT( n_AR_Q10, psLPC_Q14[ -1 ], Atmp );
|
|
|
399
|
+ Atmp = AR_shp_Q13_tmp[ 1 ];
|
|
|
400
|
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, psLPC_Q14[ -2 ], Atmp );
|
|
|
401
|
+ n_AR_Q10 = SKP_SMLAWT( n_AR_Q10, psLPC_Q14[ -3 ], Atmp );
|
|
|
402
|
+ Atmp = AR_shp_Q13_tmp[ 2 ];
|
|
|
403
|
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, psLPC_Q14[ -4 ], Atmp );
|
|
|
404
|
+ n_AR_Q10 = SKP_SMLAWT( n_AR_Q10, psLPC_Q14[ -5 ], Atmp );
|
|
|
405
|
+ Atmp = AR_shp_Q13_tmp[ 3 ];
|
|
|
406
|
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, psLPC_Q14[ -6 ], Atmp );
|
|
|
407
|
+ n_AR_Q10 = SKP_SMLAWT( n_AR_Q10, psLPC_Q14[ -7 ], Atmp );
|
|
|
408
|
+ Atmp = AR_shp_Q13_tmp[ 4 ];
|
|
|
409
|
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, psLPC_Q14[ -8 ], Atmp );
|
|
|
410
|
+ n_AR_Q10 = SKP_SMLAWT( n_AR_Q10, psLPC_Q14[ -9 ], Atmp );
|
|
|
411
|
+ Atmp = AR_shp_Q13_tmp[ 5 ];
|
|
|
412
|
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, psLPC_Q14[ -10 ], Atmp );
|
|
|
413
|
+ n_AR_Q10 = SKP_SMLAWT( n_AR_Q10, psLPC_Q14[ -11 ], Atmp );
|
|
|
414
|
+ for( j = 12; j < shapingLPCOrder; j += 2 ) {
|
|
|
415
|
+ Atmp = AR_shp_Q13_tmp[ j >> 1 ]; /* read two coefficients at once */
|
|
|
416
|
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, psLPC_Q14[ -j ], Atmp );
|
|
|
417
|
+ n_AR_Q10 = SKP_SMLAWT( n_AR_Q10, psLPC_Q14[ -j - 1 ], Atmp );
|
|
|
418
|
+ }
|
|
|
419
|
+ n_AR_Q10 = SKP_RSHIFT( n_AR_Q10, 1 ); /* Q11 -> Q10 */
|
|
|
420
|
+ n_AR_Q10 = SKP_SMLAWB( n_AR_Q10, psDD->LF_AR_Q12, Tilt_Q14 );
|
|
|
421
|
+
|
|
|
422
|
+ n_LF_Q10 = SKP_LSHIFT( SKP_SMULWB( psDD->Shape_Q10[ *smpl_buf_idx ], LF_shp_Q14 ), 2 );
|
|
|
423
|
+ n_LF_Q10 = SKP_SMLAWT( n_LF_Q10, psDD->LF_AR_Q12, LF_shp_Q14 );
|
|
|
424
|
+
|
|
|
425
|
+ /* Input minus prediction plus noise feedback */
|
|
|
426
|
+ /* r = x[ i ] - LTP_pred - LPC_pred + n_AR + n_Tilt + n_LF + n_LTP */
|
|
|
427
|
+ tmp = SKP_SUB32( LTP_pred_Q14, n_LTP_Q14 ); /* Add Q14 stuff */
|
|
|
428
|
+ tmp = SKP_RSHIFT_ROUND( tmp, 4 ); /* round to Q10 */
|
|
|
429
|
+ tmp = SKP_ADD32( tmp, LPC_pred_Q10 ); /* add Q10 stuff */
|
|
|
430
|
+ tmp = SKP_SUB32( tmp, n_AR_Q10 ); /* subtract Q10 stuff */
|
|
|
431
|
+ tmp = SKP_SUB32( tmp, n_LF_Q10 ); /* subtract Q10 stuff */
|
|
|
432
|
+ r_Q10 = SKP_SUB32( x_Q10[ i ], tmp ); /* residual error Q10 */
|
|
|
433
|
+
|
|
|
434
|
+
|
|
|
435
|
+ /* Flip sign depending on dither */
|
|
|
436
|
+ r_Q10 = ( r_Q10 ^ dither ) - dither;
|
|
|
437
|
+ r_Q10 = SKP_SUB32( r_Q10, offset_Q10 );
|
|
|
438
|
+ r_Q10 = SKP_LIMIT( r_Q10, -64 << 10, 64 << 10 );
|
|
|
439
|
+
|
|
|
440
|
+ /* Find two quantization level candidates and measure their rate-distortion */
|
|
|
441
|
+ if( r_Q10 < -1536 ) {
|
|
|
442
|
+ q1_Q10 = SKP_LSHIFT( SKP_RSHIFT_ROUND( r_Q10, 10 ), 10 );
|
|
|
443
|
+ r_Q10 = SKP_SUB32( r_Q10, q1_Q10 );
|
|
|
444
|
+ rd1_Q10 = SKP_RSHIFT( SKP_SMLABB( SKP_MUL( -SKP_ADD32( q1_Q10, offset_Q10 ), Lambda_Q10 ), r_Q10, r_Q10 ), 10 );
|
|
|
445
|
+ rd2_Q10 = SKP_ADD32( rd1_Q10, 1024 );
|
|
|
446
|
+ rd2_Q10 = SKP_SUB32( rd2_Q10, SKP_ADD_LSHIFT32( Lambda_Q10, r_Q10, 1 ) );
|
|
|
447
|
+ q2_Q10 = SKP_ADD32( q1_Q10, 1024 );
|
|
|
448
|
+ } else if( r_Q10 > 512 ) {
|
|
|
449
|
+ q1_Q10 = SKP_LSHIFT( SKP_RSHIFT_ROUND( r_Q10, 10 ), 10 );
|
|
|
450
|
+ r_Q10 = SKP_SUB32( r_Q10, q1_Q10 );
|
|
|
451
|
+ rd1_Q10 = SKP_RSHIFT( SKP_SMLABB( SKP_MUL( SKP_ADD32( q1_Q10, offset_Q10 ), Lambda_Q10 ), r_Q10, r_Q10 ), 10 );
|
|
|
452
|
+ rd2_Q10 = SKP_ADD32( rd1_Q10, 1024 );
|
|
|
453
|
+ rd2_Q10 = SKP_SUB32( rd2_Q10, SKP_SUB_LSHIFT32( Lambda_Q10, r_Q10, 1 ) );
|
|
|
454
|
+ q2_Q10 = SKP_SUB32( q1_Q10, 1024 );
|
|
|
455
|
+ } else { /* r_Q10 >= -1536 && q1_Q10 <= 512 */
|
|
|
456
|
+ rr_Q20 = SKP_SMULBB( offset_Q10, Lambda_Q10 );
|
|
|
457
|
+ rd2_Q10 = SKP_RSHIFT( SKP_SMLABB( rr_Q20, r_Q10, r_Q10 ), 10 );
|
|
|
458
|
+ rd1_Q10 = SKP_ADD32( rd2_Q10, 1024 );
|
|
|
459
|
+ rd1_Q10 = SKP_ADD32( rd1_Q10, SKP_SUB_RSHIFT32( SKP_ADD_LSHIFT32( Lambda_Q10, r_Q10, 1 ), rr_Q20, 9 ) );
|
|
|
460
|
+ q1_Q10 = -1024;
|
|
|
461
|
+ q2_Q10 = 0;
|
|
|
462
|
+ }
|
|
|
463
|
+
|
|
|
464
|
+ if( rd1_Q10 < rd2_Q10 ) {
|
|
|
465
|
+ psSS[ 0 ].RD_Q10 = SKP_ADD32( psDD->RD_Q10, rd1_Q10 );
|
|
|
466
|
+ psSS[ 1 ].RD_Q10 = SKP_ADD32( psDD->RD_Q10, rd2_Q10 );
|
|
|
467
|
+ psSS[ 0 ].Q_Q10 = q1_Q10;
|
|
|
468
|
+ psSS[ 1 ].Q_Q10 = q2_Q10;
|
|
|
469
|
+ } else {
|
|
|
470
|
+ psSS[ 0 ].RD_Q10 = SKP_ADD32( psDD->RD_Q10, rd2_Q10 );
|
|
|
471
|
+ psSS[ 1 ].RD_Q10 = SKP_ADD32( psDD->RD_Q10, rd1_Q10 );
|
|
|
472
|
+ psSS[ 0 ].Q_Q10 = q2_Q10;
|
|
|
473
|
+ psSS[ 1 ].Q_Q10 = q1_Q10;
|
|
|
474
|
+ }
|
|
|
475
|
+
|
|
|
476
|
+ /* Update states for best quantization */
|
|
|
477
|
+
|
|
|
478
|
+ /* Quantized excitation */
|
|
|
479
|
+ exc_Q10 = SKP_ADD32( offset_Q10, psSS[ 0 ].Q_Q10 );
|
|
|
480
|
+ exc_Q10 = ( exc_Q10 ^ dither ) - dither;
|
|
|
481
|
+
|
|
|
482
|
+ /* Add predictions */
|
|
|
483
|
+ LPC_exc_Q10 = exc_Q10 + SKP_RSHIFT_ROUND( LTP_pred_Q14, 4 );
|
|
|
484
|
+ xq_Q10 = SKP_ADD32( LPC_exc_Q10, LPC_pred_Q10 );
|
|
|
485
|
+
|
|
|
486
|
+ /* Update states */
|
|
|
487
|
+ sLF_AR_shp_Q10 = SKP_SUB32( xq_Q10, n_AR_Q10 );
|
|
|
488
|
+ psSS[ 0 ].sLTP_shp_Q10 = SKP_SUB32( sLF_AR_shp_Q10, n_LF_Q10 );
|
|
|
489
|
+ psSS[ 0 ].LF_AR_Q12 = SKP_LSHIFT( sLF_AR_shp_Q10, 2 );
|
|
|
490
|
+ psSS[ 0 ].xq_Q14 = SKP_LSHIFT( xq_Q10, 4 );
|
|
|
491
|
+ psSS[ 0 ].LPC_exc_Q16 = SKP_LSHIFT( LPC_exc_Q10, 6 );
|
|
|
492
|
+
|
|
|
493
|
+ /* Update states for second best quantization */
|
|
|
494
|
+
|
|
|
495
|
+ /* Quantized excitation */
|
|
|
496
|
+ exc_Q10 = SKP_ADD32( offset_Q10, psSS[ 1 ].Q_Q10 );
|
|
|
497
|
+ exc_Q10 = ( exc_Q10 ^ dither ) - dither;
|
|
|
498
|
+
|
|
|
499
|
+ /* Add predictions */
|
|
|
500
|
+ LPC_exc_Q10 = exc_Q10 + SKP_RSHIFT_ROUND( LTP_pred_Q14, 4 );
|
|
|
501
|
+ xq_Q10 = SKP_ADD32( LPC_exc_Q10, LPC_pred_Q10 );
|
|
|
502
|
+
|
|
|
503
|
+ /* Update states */
|
|
|
504
|
+ sLF_AR_shp_Q10 = SKP_SUB32( xq_Q10, n_AR_Q10 );
|
|
|
505
|
+ psSS[ 1 ].sLTP_shp_Q10 = SKP_SUB32( sLF_AR_shp_Q10, n_LF_Q10 );
|
|
|
506
|
+ psSS[ 1 ].LF_AR_Q12 = SKP_LSHIFT( sLF_AR_shp_Q10, 2 );
|
|
|
507
|
+ psSS[ 1 ].xq_Q14 = SKP_LSHIFT( xq_Q10, 4 );
|
|
|
508
|
+ psSS[ 1 ].LPC_exc_Q16 = SKP_LSHIFT( LPC_exc_Q10, 6 );
|
|
|
509
|
+ }
|
|
|
510
|
+
|
|
|
511
|
+ *smpl_buf_idx = ( *smpl_buf_idx - 1 ) & DECISION_DELAY_MASK; /* Index to newest samples */
|
|
|
512
|
+ last_smple_idx = ( *smpl_buf_idx + decisionDelay ) & DECISION_DELAY_MASK; /* Index to decisionDelay old samples */
|
|
|
513
|
+
|
|
|
514
|
+ /* Find winner */
|
|
|
515
|
+ RDmin_Q10 = psSampleState[ 0 ][ 0 ].RD_Q10;
|
|
|
516
|
+ Winner_ind = 0;
|
|
|
517
|
+ for( k = 1; k < nStatesDelayedDecision; k++ ) {
|
|
|
518
|
+ if( psSampleState[ k ][ 0 ].RD_Q10 < RDmin_Q10 ) {
|
|
|
519
|
+ RDmin_Q10 = psSampleState[ k ][ 0 ].RD_Q10;
|
|
|
520
|
+ Winner_ind = k;
|
|
|
521
|
+ }
|
|
|
522
|
+ }
|
|
|
523
|
+
|
|
|
524
|
+ /* Increase RD values of expired states */
|
|
|
525
|
+ Winner_rand_state = psDelDec[ Winner_ind ].RandState[ last_smple_idx ];
|
|
|
526
|
+ for( k = 0; k < nStatesDelayedDecision; k++ ) {
|
|
|
527
|
+ if( psDelDec[ k ].RandState[ last_smple_idx ] != Winner_rand_state ) {
|
|
|
528
|
+ psSampleState[ k ][ 0 ].RD_Q10 = SKP_ADD32( psSampleState[ k ][ 0 ].RD_Q10, ( SKP_int32_MAX >> 4 ) );
|
|
|
529
|
+ psSampleState[ k ][ 1 ].RD_Q10 = SKP_ADD32( psSampleState[ k ][ 1 ].RD_Q10, ( SKP_int32_MAX >> 4 ) );
|
|
|
530
|
+ SKP_assert( psSampleState[ k ][ 0 ].RD_Q10 >= 0 );
|
|
|
531
|
+ }
|
|
|
532
|
+ }
|
|
|
533
|
+
|
|
|
534
|
+ /* Find worst in first set and best in second set */
|
|
|
535
|
+ RDmax_Q10 = psSampleState[ 0 ][ 0 ].RD_Q10;
|
|
|
536
|
+ RDmin_Q10 = psSampleState[ 0 ][ 1 ].RD_Q10;
|
|
|
537
|
+ RDmax_ind = 0;
|
|
|
538
|
+ RDmin_ind = 0;
|
|
|
539
|
+ for( k = 1; k < nStatesDelayedDecision; k++ ) {
|
|
|
540
|
+ /* find worst in first set */
|
|
|
541
|
+ if( psSampleState[ k ][ 0 ].RD_Q10 > RDmax_Q10 ) {
|
|
|
542
|
+ RDmax_Q10 = psSampleState[ k ][ 0 ].RD_Q10;
|
|
|
543
|
+ RDmax_ind = k;
|
|
|
544
|
+ }
|
|
|
545
|
+ /* find best in second set */
|
|
|
546
|
+ if( psSampleState[ k ][ 1 ].RD_Q10 < RDmin_Q10 ) {
|
|
|
547
|
+ RDmin_Q10 = psSampleState[ k ][ 1 ].RD_Q10;
|
|
|
548
|
+ RDmin_ind = k;
|
|
|
549
|
+ }
|
|
|
550
|
+ }
|
|
|
551
|
+
|
|
|
552
|
+ /* Replace a state if best from second set outperforms worst in first set */
|
|
|
553
|
+ if( RDmin_Q10 < RDmax_Q10 ) {
|
|
|
554
|
+ SKP_Silk_copy_del_dec_state( &psDelDec[ RDmax_ind ], &psDelDec[ RDmin_ind ], i );
|
|
|
555
|
+ SKP_memcpy( &psSampleState[ RDmax_ind ][ 0 ], &psSampleState[ RDmin_ind ][ 1 ], sizeof( NSQ_sample_struct ) );
|
|
|
556
|
+ }
|
|
|
557
|
+
|
|
|
558
|
+ /* Write samples from winner to output and long-term filter states */
|
|
|
559
|
+ psDD = &psDelDec[ Winner_ind ];
|
|
|
560
|
+ if( subfr > 0 || i >= decisionDelay ) {
|
|
|
561
|
+ q[ i - decisionDelay ] = ( SKP_int )SKP_RSHIFT( psDD->Q_Q10[ last_smple_idx ], 10 );
|
|
|
562
|
+ xq[ i - decisionDelay ] = ( SKP_int16 )SKP_SAT16( SKP_RSHIFT_ROUND(
|
|
|
563
|
+ SKP_SMULWW( psDD->Xq_Q10[ last_smple_idx ], psDD->Gain_Q16[ last_smple_idx ] ), 10 ) );
|
|
|
564
|
+ NSQ->sLTP_shp_Q10[ NSQ->sLTP_shp_buf_idx - decisionDelay ] = psDD->Shape_Q10[ last_smple_idx ];
|
|
|
565
|
+ sLTP_Q16[ NSQ->sLTP_buf_idx - decisionDelay ] = psDD->Pred_Q16[ last_smple_idx ];
|
|
|
566
|
+ }
|
|
|
567
|
+ NSQ->sLTP_shp_buf_idx++;
|
|
|
568
|
+ NSQ->sLTP_buf_idx++;
|
|
|
569
|
+
|
|
|
570
|
+ /* Update states */
|
|
|
571
|
+ for( k = 0; k < nStatesDelayedDecision; k++ ) {
|
|
|
572
|
+ psDD = &psDelDec[ k ];
|
|
|
573
|
+ psSS = &psSampleState[ k ][ 0 ];
|
|
|
574
|
+ psDD->LF_AR_Q12 = psSS->LF_AR_Q12;
|
|
|
575
|
+ psDD->sLPC_Q14[ NSQ_LPC_BUF_LENGTH + i ] = psSS->xq_Q14;
|
|
|
576
|
+ psDD->Xq_Q10[ *smpl_buf_idx ] = SKP_RSHIFT( psSS->xq_Q14, 4 );
|
|
|
577
|
+ psDD->Q_Q10[ *smpl_buf_idx ] = psSS->Q_Q10;
|
|
|
578
|
+ psDD->Pred_Q16[ *smpl_buf_idx ] = psSS->LPC_exc_Q16;
|
|
|
579
|
+ psDD->Shape_Q10[ *smpl_buf_idx ] = psSS->sLTP_shp_Q10;
|
|
|
580
|
+ psDD->Seed = SKP_ADD_RSHIFT32( psDD->Seed, psSS->Q_Q10, 10 );
|
|
|
581
|
+ psDD->RandState[ *smpl_buf_idx ] = psDD->Seed;
|
|
|
582
|
+ psDD->RD_Q10 = psSS->RD_Q10;
|
|
|
583
|
+ psDD->Gain_Q16[ *smpl_buf_idx ] = Gain_Q16;
|
|
|
584
|
+ }
|
|
|
585
|
+ }
|
|
|
586
|
+ /* Update LPC states */
|
|
|
587
|
+ for( k = 0; k < nStatesDelayedDecision; k++ ) {
|
|
|
588
|
+ psDD = &psDelDec[ k ];
|
|
|
589
|
+ SKP_memcpy( psDD->sLPC_Q14, &psDD->sLPC_Q14[ length ], NSQ_LPC_BUF_LENGTH * sizeof( SKP_int32 ) );
|
|
|
590
|
+ }
|
|
|
591
|
+}
|
|
|
592
|
+
|
|
|
593
|
+SKP_INLINE void SKP_Silk_nsq_del_dec_scale_states(
|
|
|
594
|
+ SKP_Silk_nsq_state *NSQ, /* I/O NSQ state */
|
|
|
595
|
+ NSQ_del_dec_struct psDelDec[], /* I/O Delayed decision states */
|
|
|
596
|
+ const SKP_int16 x[], /* I Input in Q0 */
|
|
|
597
|
+ SKP_int32 x_sc_Q10[], /* O Input scaled with 1/Gain in Q10 */
|
|
|
598
|
+ SKP_int length, /* I Length of input */
|
|
|
599
|
+ SKP_int16 sLTP[], /* I Re-whitened LTP state in Q0 */
|
|
|
600
|
+ SKP_int32 sLTP_Q16[], /* O LTP state matching scaled input */
|
|
|
601
|
+ SKP_int subfr, /* I Subframe number */
|
|
|
602
|
+ SKP_int nStatesDelayedDecision, /* I Number of del dec states */
|
|
|
603
|
+ SKP_int smpl_buf_idx, /* I Index to newest samples in buffers */
|
|
|
604
|
+ const SKP_int LTP_scale_Q14, /* I LTP state scaling */
|
|
|
605
|
+ const SKP_int32 Gains_Q16[ NB_SUBFR ], /* I */
|
|
|
606
|
+ const SKP_int pitchL[ NB_SUBFR ] /* I Pitch lag */
|
|
|
607
|
+)
|
|
|
608
|
+{
|
|
|
609
|
+ SKP_int i, k, scale_length, lag;
|
|
|
610
|
+ SKP_int32 inv_gain_Q16, gain_adj_Q16, inv_gain_Q32;
|
|
|
611
|
+ NSQ_del_dec_struct *psDD;
|
|
|
612
|
+
|
|
|
613
|
+ inv_gain_Q16 = SKP_DIV32( SKP_int32_MAX, SKP_RSHIFT( Gains_Q16[ subfr ], 1 ) );
|
|
|
614
|
+ inv_gain_Q16 = SKP_min( inv_gain_Q16, SKP_int16_MAX );
|
|
|
615
|
+ lag = pitchL[ subfr ];
|
|
|
616
|
+ /* After rewhitening the LTP state is un-scaled. So scale with inv_gain_Q16 */
|
|
|
617
|
+ if( NSQ->rewhite_flag ) {
|
|
|
618
|
+ inv_gain_Q32 = SKP_LSHIFT( inv_gain_Q16, 16 );
|
|
|
619
|
+ if( subfr == 0 ) {
|
|
|
620
|
+ /* Do LTP downscaling */
|
|
|
621
|
+ inv_gain_Q32 = SKP_LSHIFT( SKP_SMULWB( inv_gain_Q32, LTP_scale_Q14 ), 2 );
|
|
|
622
|
+ }
|
|
|
623
|
+ for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) {
|
|
|
624
|
+ SKP_assert( i < MAX_FRAME_LENGTH );
|
|
|
625
|
+ sLTP_Q16[ i ] = SKP_SMULWB( inv_gain_Q32, sLTP[ i ] );
|
|
|
626
|
+ }
|
|
|
627
|
+ }
|
|
|
628
|
+
|
|
|
629
|
+ /* Adjust for changing gain */
|
|
|
630
|
+ if( inv_gain_Q16 != NSQ->prev_inv_gain_Q16 ) {
|
|
|
631
|
+ gain_adj_Q16 = SKP_DIV32_varQ( inv_gain_Q16, NSQ->prev_inv_gain_Q16, 16 );
|
|
|
632
|
+
|
|
|
633
|
+ for( k = 0; k < nStatesDelayedDecision; k++ ) {
|
|
|
634
|
+ psDD = &psDelDec[ k ];
|
|
|
635
|
+
|
|
|
636
|
+ /* Scale scalar states */
|
|
|
637
|
+ psDD->LF_AR_Q12 = SKP_SMULWW( gain_adj_Q16, psDD->LF_AR_Q12 );
|
|
|
638
|
+
|
|
|
639
|
+ /* scale short term state */
|
|
|
640
|
+ for( i = 0; i < NSQ_LPC_BUF_LENGTH; i++ ) {
|
|
|
641
|
+ psDD->sLPC_Q14[ NSQ_LPC_BUF_LENGTH - i - 1 ] = SKP_SMULWW( gain_adj_Q16, psDD->sLPC_Q14[ NSQ_LPC_BUF_LENGTH - i - 1 ] );
|
|
|
642
|
+ }
|
|
|
643
|
+ for( i = 0; i < DECISION_DELAY; i++ ) {
|
|
|
644
|
+ psDD->Pred_Q16[ i ] = SKP_SMULWW( gain_adj_Q16, psDD->Pred_Q16[ i ] );
|
|
|
645
|
+ psDD->Shape_Q10[ i ] = SKP_SMULWW( gain_adj_Q16, psDD->Shape_Q10[ i ] );
|
|
|
646
|
+ }
|
|
|
647
|
+ }
|
|
|
648
|
+
|
|
|
649
|
+ /* Scale long term shaping state */
|
|
|
650
|
+
|
|
|
651
|
+ /* Calculate length to be scaled, Worst case: Next frame is voiced with max lag */
|
|
|
652
|
+ scale_length = length * NB_SUBFR; /* aprox max lag */
|
|
|
653
|
+ scale_length = scale_length - SKP_SMULBB( NB_SUBFR - ( subfr + 1 ), length ); /* subtract samples that will be too old in next frame */
|
|
|
654
|
+ scale_length = SKP_max_int( scale_length, lag + LTP_ORDER ); /* make sure to scale whole pitch period if voiced */
|
|
|
655
|
+
|
|
|
656
|
+ for( i = NSQ->sLTP_shp_buf_idx - scale_length; i < NSQ->sLTP_shp_buf_idx; i++ ) {
|
|
|
657
|
+ NSQ->sLTP_shp_Q10[ i ] = SKP_SMULWW( gain_adj_Q16, NSQ->sLTP_shp_Q10[ i ] );
|
|
|
658
|
+ }
|
|
|
659
|
+
|
|
|
660
|
+ /* Scale LTP predict state */
|
|
|
661
|
+ if( NSQ->rewhite_flag == 0 ) {
|
|
|
662
|
+ for( i = NSQ->sLTP_buf_idx - lag - LTP_ORDER / 2; i < NSQ->sLTP_buf_idx; i++ ) {
|
|
|
663
|
+ sLTP_Q16[ i ] = SKP_SMULWW( gain_adj_Q16, sLTP_Q16[ i ] );
|
|
|
664
|
+ }
|
|
|
665
|
+ }
|
|
|
666
|
+ }
|
|
|
667
|
+
|
|
|
668
|
+ /* Scale input */
|
|
|
669
|
+ for( i = 0; i < length; i++ ) {
|
|
|
670
|
+ x_sc_Q10[ i ] = SKP_RSHIFT( SKP_SMULBB( x[ i ], ( SKP_int16 )inv_gain_Q16 ), 6 );
|
|
|
671
|
+ }
|
|
|
672
|
+
|
|
|
673
|
+ /* save inv_gain */
|
|
|
674
|
+ SKP_assert( inv_gain_Q16 != 0 );
|
|
|
675
|
+ NSQ->prev_inv_gain_Q16 = inv_gain_Q16;
|
|
|
676
|
+}
|
|
|
677
|
+
|
|
|
678
|
+SKP_INLINE void SKP_Silk_copy_del_dec_state(
|
|
|
679
|
+ NSQ_del_dec_struct *DD_dst, /* I Dst del dec state */
|
|
|
680
|
+ NSQ_del_dec_struct *DD_src, /* I Src del dec state */
|
|
|
681
|
+ SKP_int LPC_state_idx /* I Index to LPC buffer */
|
|
|
682
|
+)
|
|
|
683
|
+{
|
|
|
684
|
+ SKP_memcpy( DD_dst->RandState, DD_src->RandState, DECISION_DELAY * sizeof( SKP_int ) );
|
|
|
685
|
+ SKP_memcpy( DD_dst->Q_Q10, DD_src->Q_Q10, DECISION_DELAY * sizeof( SKP_int32 ) );
|
|
|
686
|
+ SKP_memcpy( DD_dst->Pred_Q16, DD_src->Pred_Q16, DECISION_DELAY * sizeof( SKP_int32 ) );
|
|
|
687
|
+ SKP_memcpy( DD_dst->Shape_Q10, DD_src->Shape_Q10, DECISION_DELAY * sizeof( SKP_int32 ) );
|
|
|
688
|
+ SKP_memcpy( DD_dst->Xq_Q10, DD_src->Xq_Q10, DECISION_DELAY * sizeof( SKP_int32 ) );
|
|
|
689
|
+
|
|
|
690
|
+ SKP_memcpy( &DD_dst->sLPC_Q14[ LPC_state_idx ], &DD_src->sLPC_Q14[ LPC_state_idx ], NSQ_LPC_BUF_LENGTH * sizeof( SKP_int32 ) );
|
|
|
691
|
+ DD_dst->LF_AR_Q12 = DD_src->LF_AR_Q12;
|
|
|
692
|
+ DD_dst->Seed = DD_src->Seed;
|
|
|
693
|
+ DD_dst->SeedInit = DD_src->SeedInit;
|
|
|
694
|
+ DD_dst->RD_Q10 = DD_src->RD_Q10;
|
|
|
695
|
+}
|
chenzubin