ref: 06237d7b8cb26ad627fc9541e01f2437ef8b19b8
dir: /silk/silk_SigProc_FIX.h/
/***********************************************************************
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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***********************************************************************/
#ifndef _SILK_SIGPROC_FIX_H_
#define _SILK_SIGPROC_FIX_H_
#ifdef __cplusplus
extern "C"
{
#endif
/*#define SKP_MACRO_COUNT */ /* Used to enable WMOPS counting */
#define SILK_MAX_ORDER_LPC 16 /* max order of the LPC analysis in schur() and k2a() */
#include <stdlib.h> /* for abs() */
#include <string.h> /* for memset(), memcpy(), memmove() */
#include "silk_typedef.h"
#include "silk_resampler_structs.h"
#include "silk_macros.h"
/********************************************************************/
/* SIGNAL PROCESSING FUNCTIONS */
/********************************************************************/
/*!
* Initialize/reset the resampler state for a given pair of input/output sampling rates
*/
opus_int silk_resampler_init(
silk_resampler_state_struct *S, /* I/O: Resampler state */
opus_int32 Fs_Hz_in, /* I: Input sampling rate (Hz) */
opus_int32 Fs_Hz_out /* I: Output sampling rate (Hz) */
);
/*!
* Clear the states of all resampling filters, without resetting sampling rate ratio
*/
opus_int silk_resampler_clear(
silk_resampler_state_struct *S /* I/O: Resampler state */
);
/*!
* Resampler: convert from one sampling rate to another
*/
opus_int silk_resampler(
silk_resampler_state_struct *S, /* I/O: Resampler state */
opus_int16 out[], /* O: Output signal */
const opus_int16 in[], /* I: Input signal */
opus_int32 inLen /* I: Number of input samples */
);
/*!
Upsample 2x, low quality
*/
void silk_resampler_up2(
opus_int32 *S, /* I/O: State vector [ 2 ] */
opus_int16 *out, /* O: Output signal [ 2 * len ] */
const opus_int16 *in, /* I: Input signal [ len ] */
opus_int32 len /* I: Number of input samples */
);
/*!
* Downsample 2x, mediocre quality
*/
void silk_resampler_down2(
opus_int32 *S, /* I/O: State vector [ 2 ] */
opus_int16 *out, /* O: Output signal [ len ] */
const opus_int16 *in, /* I: Input signal [ floor(len/2) ] */
opus_int32 inLen /* I: Number of input samples */
);
/*!
* Downsample by a factor 2/3, low quality
*/
void silk_resampler_down2_3(
opus_int32 *S, /* I/O: State vector [ 6 ] */
opus_int16 *out, /* O: Output signal [ floor(2*inLen/3) ] */
const opus_int16 *in, /* I: Input signal [ inLen ] */
opus_int32 inLen /* I: Number of input samples */
);
/*!
* Downsample by a factor 3, low quality
*/
void silk_resampler_down3(
opus_int32 *S, /* I/O: State vector [ 8 ] */
opus_int16 *out, /* O: Output signal [ floor(inLen/3) ] */
const opus_int16 *in, /* I: Input signal [ inLen ] */
opus_int32 inLen /* I: Number of input samples */
);
/*!
* second order ARMA filter;
* slower than biquad() but uses more precise coefficients
* can handle (slowly) varying coefficients
*/
void silk_biquad_alt(
const opus_int16 *in, /* I: input signal */
const opus_int32 *B_Q28, /* I: MA coefficients [3] */
const opus_int32 *A_Q28, /* I: AR coefficients [2] */
opus_int32 *S, /* I/O: State vector [2] */
opus_int16 *out, /* O: output signal */
const opus_int32 len /* I: signal length (must be even) */
);
/* Variable order MA prediction error filter. */
void silk_LPC_analysis_filter(
opus_int16 *out, /* O: Output signal */
const opus_int16 *in, /* I: Input signal */
const opus_int16 *B, /* I: MA prediction coefficients, Q12 [order] */
const opus_int32 len, /* I: Signal length */
const opus_int32 Order /* I: Filter order */
);
/* Chirp (bandwidth expand) LP AR filter */
void silk_bwexpander(
opus_int16 *ar, /* I/O AR filter to be expanded (without leading 1) */
const opus_int d, /* I Length of ar */
opus_int32 chirp_Q16 /* I Chirp factor (typically in the range 0 to 1) */
);
/* Chirp (bandwidth expand) LP AR filter */
void silk_bwexpander_32(
opus_int32 *ar, /* I/O AR filter to be expanded (without leading 1) */
const opus_int d, /* I Length of ar */
opus_int32 chirp_Q16 /* I Chirp factor in Q16 */
);
/* Compute inverse of LPC prediction gain, and */
/* test if LPC coefficients are stable (all poles within unit circle) */
opus_int silk_LPC_inverse_pred_gain( /* O: Returns 1 if unstable, otherwise 0 */
opus_int32 *invGain_Q30, /* O: Inverse prediction gain, Q30 energy domain */
const opus_int16 *A_Q12, /* I: Prediction coefficients, Q12 [order] */
const opus_int order /* I: Prediction order */
);
opus_int silk_LPC_inverse_pred_gain_Q24( /* O: Returns 1 if unstable, otherwise 0 */
opus_int32 *invGain_Q30, /* O: Inverse prediction gain, Q30 energy domain */
const opus_int32 *A_Q24, /* I: Prediction coefficients, Q24 [order] */
const opus_int order /* I: Prediction order */
);
/* split signal in two decimated bands using first-order allpass filters */
void silk_ana_filt_bank_1(
const opus_int16 *in, /* I: Input signal [N] */
opus_int32 *S, /* I/O: State vector [2] */
opus_int16 *outL, /* O: Low band [N/2] */
opus_int16 *outH, /* O: High band [N/2] */
const opus_int32 N /* I: Number of input samples */
);
/********************************************************************/
/* SCALAR FUNCTIONS */
/********************************************************************/
/* approximation of 128 * log2() (exact inverse of approx 2^() below) */
/* convert input to a log scale */
opus_int32 silk_lin2log(const opus_int32 inLin); /* I: input in linear scale */
/* Approximation of a sigmoid function */
opus_int silk_sigm_Q15(opus_int in_Q5);
/* approximation of 2^() (exact inverse of approx log2() above) */
/* convert input to a linear scale */
opus_int32 silk_log2lin(const opus_int32 inLog_Q7); /* I: input on log scale */
/* Function that returns the maximum absolut value of the input vector */
opus_int16 silk_int16_array_maxabs( /* O Maximum absolute value, max: 2^15-1 */
const opus_int16 *vec, /* I Input vector [len] */
const opus_int32 len /* I Length of input vector */
);
/* Compute number of bits to right shift the sum of squares of a vector */
/* of int16s to make it fit in an int32 */
void silk_sum_sqr_shift(
opus_int32 *energy, /* O Energy of x, after shifting to the right */
opus_int *shift, /* O Number of bits right shift applied to energy */
const opus_int16 *x, /* I Input vector */
opus_int len /* I Length of input vector */
);
/* Calculates the reflection coefficients from the correlation sequence */
/* Faster than schur64(), but much less accurate. */
/* uses SMLAWB(), requiring armv5E and higher. */
opus_int32 silk_schur( /* O: Returns residual energy */
opus_int16 *rc_Q15, /* O: reflection coefficients [order] Q15 */
const opus_int32 *c, /* I: correlations [order+1] */
const opus_int32 order /* I: prediction order */
);
/* Calculates the reflection coefficients from the correlation sequence */
/* Slower than schur(), but more accurate. */
/* Uses SMULL(), available on armv4 */
opus_int32 silk_schur64( /* O: returns residual energy */
opus_int32 rc_Q16[], /* O: Reflection coefficients [order] Q16 */
const opus_int32 c[], /* I: Correlations [order+1] */
opus_int32 order /* I: Prediction order */
);
/* Step up function, converts reflection coefficients to prediction coefficients */
void silk_k2a(
opus_int32 *A_Q24, /* O: Prediction coefficients [order] Q24 */
const opus_int16 *rc_Q15, /* I: Reflection coefficients [order] Q15 */
const opus_int32 order /* I: Prediction order */
);
/* Step up function, converts reflection coefficients to prediction coefficients */
void silk_k2a_Q16(
opus_int32 *A_Q24, /* O: Prediction coefficients [order] Q24 */
const opus_int32 *rc_Q16, /* I: Reflection coefficients [order] Q16 */
const opus_int32 order /* I: Prediction order */
);
/* Apply sine window to signal vector. */
/* Window types: */
/* 1 -> sine window from 0 to pi/2 */
/* 2 -> sine window from pi/2 to pi */
/* every other sample of window is linearly interpolated, for speed */
void silk_apply_sine_window(
opus_int16 px_win[], /* O Pointer to windowed signal */
const opus_int16 px[], /* I Pointer to input signal */
const opus_int win_type, /* I Selects a window type */
const opus_int length /* I Window length, multiple of 4 */
);
/* Compute autocorrelation */
void silk_autocorr(
opus_int32 *results, /* O Result (length correlationCount) */
opus_int *scale, /* O Scaling of the correlation vector */
const opus_int16 *inputData, /* I Input data to correlate */
const opus_int inputDataSize, /* I Length of input */
const opus_int correlationCount /* I Number of correlation taps to compute */
);
/* Pitch estimator */
#define SILK_PE_MIN_COMPLEX 0
#define SILK_PE_MID_COMPLEX 1
#define SILK_PE_MAX_COMPLEX 2
void silk_decode_pitch(
opus_int16 lagIndex, /* I */
opus_int8 contourIndex, /* O */
opus_int pitch_lags[], /* O 4 pitch values */
const opus_int Fs_kHz, /* I sampling frequency (kHz) */
const opus_int nb_subfr /* I number of sub frames */
);
opus_int silk_pitch_analysis_core( /* O Voicing estimate: 0 voiced, 1 unvoiced */
const opus_int16 *signal, /* I Signal of length PE_FRAME_LENGTH_MS*Fs_kHz */
opus_int *pitch_out, /* O 4 pitch lag values */
opus_int16 *lagIndex, /* O Lag Index */
opus_int8 *contourIndex, /* O Pitch contour Index */
opus_int *LTPCorr_Q15, /* I/O Normalized correlation; input: value from previous frame */
opus_int prevLag, /* I Last lag of previous frame; set to zero is unvoiced */
const opus_int32 search_thres1_Q16, /* I First stage threshold for lag candidates 0 - 1 */
const opus_int search_thres2_Q15, /* I Final threshold for lag candidates 0 - 1 */
const opus_int Fs_kHz, /* I Sample frequency (kHz) */
const opus_int complexity, /* I Complexity setting, 0-2, where 2 is highest */
const opus_int nb_subfr /* I number of 5 ms subframes */
);
/* Compute Normalized Line Spectral Frequencies (NLSFs) from whitening filter coefficients */
/* If not all roots are found, the a_Q16 coefficients are bandwidth expanded until convergence. */
void silk_A2NLSF(
opus_int16 *NLSF, /* O Normalized Line Spectral Frequencies, Q15 (0 - (2^15-1)), [d] */
opus_int32 *a_Q16, /* I/O Monic whitening filter coefficients in Q16 [d] */
const opus_int d /* I Filter order (must be even) */
);
/* compute whitening filter coefficients from normalized line spectral frequencies */
void silk_NLSF2A(
opus_int16 *a_Q12, /* O monic whitening filter coefficients in Q12, [ d ] */
const opus_int16 *NLSF, /* I normalized line spectral frequencies in Q15, [ d ] */
const opus_int d /* I filter order (should be even) */
);
void silk_insertion_sort_increasing(
opus_int32 *a, /* I/O Unsorted / Sorted vector */
opus_int *idx, /* O: Index vector for the sorted elements */
const opus_int L, /* I: Vector length */
const opus_int K /* I: Number of correctly sorted positions */
);
void silk_insertion_sort_decreasing_int16(
opus_int16 *a, /* I/O: Unsorted / Sorted vector */
opus_int *idx, /* O: Index vector for the sorted elements */
const opus_int L, /* I: Vector length */
const opus_int K /* I: Number of correctly sorted positions */
);
void silk_insertion_sort_increasing_all_values_int16(
opus_int16 *a, /* I/O: Unsorted / Sorted vector */
const opus_int L /* I: Vector length */
);
/* NLSF stabilizer, for a single input data vector */
void silk_NLSF_stabilize(
opus_int16 *NLSF_Q15, /* I/O: Unstable/stabilized normalized LSF vector in Q15 [L] */
const opus_int16 *NDeltaMin_Q15, /* I: Normalized delta min vector in Q15, NDeltaMin_Q15[L] must be >= 1 [L+1] */
const opus_int L /* I: Number of NLSF parameters in the input vector */
);
/* Laroia low complexity NLSF weights */
void silk_NLSF_VQ_weights_laroia(
opus_int16 *pNLSFW_Q_OUT, /* O: Pointer to input vector weights [D x 1] */
const opus_int16 *pNLSF_Q15, /* I: Pointer to input vector [D x 1] */
const opus_int D /* I: Input vector dimension (even) */
);
/* Compute reflection coefficients from input signal */
void silk_burg_modified(
opus_int32 *res_nrg, /* O residual energy */
opus_int *res_nrgQ, /* O residual energy Q value */
opus_int32 A_Q16[], /* O prediction coefficients (length order) */
const opus_int16 x[], /* I input signal, length: nb_subfr * ( D + subfr_length ) */
const opus_int subfr_length, /* I input signal subframe length (including D preceeding samples) */
const opus_int nb_subfr, /* I number of subframes stacked in x */
const opus_int32 WhiteNoiseFrac_Q32, /* I fraction added to zero-lag autocorrelation */
const opus_int D /* I order */
);
/* Copy and multiply a vector by a constant */
void silk_scale_copy_vector16(
opus_int16 *data_out,
const opus_int16 *data_in,
opus_int32 gain_Q16, /* I: gain in Q16 */
const opus_int dataSize /* I: length */
);
/* Some for the LTP related function requires Q26 to work.*/
void silk_scale_vector32_Q26_lshift_18(
opus_int32 *data1, /* I/O: Q0/Q18 */
opus_int32 gain_Q26, /* I: Q26 */
opus_int dataSize /* I: length */
);
/********************************************************************/
/* INLINE ARM MATH */
/********************************************************************/
/* return sum(inVec1[i]*inVec2[i]) */
opus_int32 silk_inner_prod_aligned(
const opus_int16 *const inVec1, /* I input vector 1 */
const opus_int16 *const inVec2, /* I input vector 2 */
const opus_int len /* I vector lengths */
);
opus_int32 silk_inner_prod_aligned_scale(
const opus_int16 *const inVec1, /* I input vector 1 */
const opus_int16 *const inVec2, /* I input vector 2 */
const opus_int scale, /* I number of bits to shift */
const opus_int len /* I vector lengths */
);
opus_int64 silk_inner_prod16_aligned_64(
const opus_int16 *inVec1, /* I input vector 1 */
const opus_int16 *inVec2, /* I input vector 2 */
const opus_int len /* I vector lengths */
);
/********************************************************************/
/* MACROS */
/********************************************************************/
/* Rotate a32 right by 'rot' bits. Negative rot values result in rotating
left. Output is 32bit int.
Note: contemporary compilers recognize the C expression below and
compile it into a 'ror' instruction if available. No need for inline ASM! */
static inline opus_int32 silk_ROR32( opus_int32 a32, opus_int rot )
{
opus_uint32 x = (opus_uint32) a32;
opus_uint32 r = (opus_uint32) rot;
opus_uint32 m = (opus_uint32) -rot;
if(rot <= 0)
return (opus_int32) ((x << m) | (x >> (32 - m)));
else
return (opus_int32) ((x << (32 - r)) | (x >> r));
}
/* Allocate opus_int16 alligned to 4-byte memory address */
#if EMBEDDED_ARM
#define SKP_DWORD_ALIGN __attribute__((aligned(4)))
#else
#define SKP_DWORD_ALIGN
#endif
/* Useful Macros that can be adjusted to other platforms */
#define SKP_memcpy(a, b, c) memcpy((a), (b), (c)) /* Dest, Src, ByteCount */
#define SKP_memset(a, b, c) memset((a), (b), (c)) /* Dest, value, ByteCount */
#define SKP_memmove(a, b, c) memmove((a), (b), (c)) /* Dest, Src, ByteCount */
/* fixed point macros */
/* (a32 * b32) output have to be 32bit int */
#define SKP_MUL(a32, b32) ((a32) * (b32))
/* (a32 * b32) output have to be 32bit uint */
#define SKP_MUL_uint(a32, b32) SKP_MUL(a32, b32)
/* a32 + (b32 * c32) output have to be 32bit int */
#define SKP_MLA(a32, b32, c32) SKP_ADD32((a32),((b32) * (c32)))
/* a32 + (b32 * c32) output have to be 32bit uint */
#define SKP_MLA_uint(a32, b32, c32) SKP_MLA(a32, b32, c32)
/* ((a32 >> 16) * (b32 >> 16)) output have to be 32bit int */
#define SKP_SMULTT(a32, b32) (((a32) >> 16) * ((b32) >> 16))
/* a32 + ((a32 >> 16) * (b32 >> 16)) output have to be 32bit int */
#define SKP_SMLATT(a32, b32, c32) SKP_ADD32((a32),((b32) >> 16) * ((c32) >> 16))
#define SKP_SMLALBB(a64, b16, c16) SKP_ADD64((a64),(opus_int64)((opus_int32)(b16) * (opus_int32)(c16)))
/* (a32 * b32) */
#define SKP_SMULL(a32, b32) ((opus_int64)(a32) * /*(opus_int64)*/(b32))
/* multiply-accumulate macros that allow overflow in the addition (ie, no asserts in debug mode)*/
#define SKP_MLA_ovflw(a32, b32, c32) SKP_MLA(a32, b32, c32)
#ifndef SKP_SMLABB_ovflw
# define SKP_SMLABB_ovflw(a32, b32, c32) SKP_SMLABB(a32, b32, c32)
#endif
#define SKP_SMLABT_ovflw(a32, b32, c32) SKP_SMLABT(a32, b32, c32)
#define SKP_SMLATT_ovflw(a32, b32, c32) SKP_SMLATT(a32, b32, c32)
#define SKP_SMLAWB_ovflw(a32, b32, c32) SKP_SMLAWB(a32, b32, c32)
#define SKP_SMLAWT_ovflw(a32, b32, c32) SKP_SMLAWT(a32, b32, c32)
#define SKP_DIV32_16(a32, b16) ((opus_int32)((a32) / (b16)))
#define SKP_DIV32(a32, b32) ((opus_int32)((a32) / (b32)))
/* These macros enables checking for overflow in silk_API_Debug.h*/
#define SKP_ADD16(a, b) ((a) + (b))
#define SKP_ADD32(a, b) ((a) + (b))
#define SKP_ADD64(a, b) ((a) + (b))
#define SKP_SUB16(a, b) ((a) - (b))
#define SKP_SUB32(a, b) ((a) - (b))
#define SKP_SUB64(a, b) ((a) - (b))
#define SKP_SAT8(a) ((a) > SKP_int8_MAX ? SKP_int8_MAX : \
((a) < SKP_int8_MIN ? SKP_int8_MIN : (a)))
#define SKP_SAT16(a) ((a) > SKP_int16_MAX ? SKP_int16_MAX : \
((a) < SKP_int16_MIN ? SKP_int16_MIN : (a)))
#define SKP_SAT32(a) ((a) > SKP_int32_MAX ? SKP_int32_MAX : \
((a) < SKP_int32_MIN ? SKP_int32_MIN : (a)))
#define SKP_CHECK_FIT8(a) (a)
#define SKP_CHECK_FIT16(a) (a)
#define SKP_CHECK_FIT32(a) (a)
#define SKP_ADD_SAT16(a, b) (opus_int16)SKP_SAT16( SKP_ADD32( (opus_int32)(a), (b) ) )
#define SKP_ADD_SAT64(a, b) ((((a) + (b)) & 0x8000000000000000LL) == 0 ? \
((((a) & (b)) & 0x8000000000000000LL) != 0 ? SKP_int64_MIN : (a)+(b)) : \
((((a) | (b)) & 0x8000000000000000LL) == 0 ? SKP_int64_MAX : (a)+(b)) )
#define SKP_SUB_SAT16(a, b) (opus_int16)SKP_SAT16( SKP_SUB32( (opus_int32)(a), (b) ) )
#define SKP_SUB_SAT64(a, b) ((((a)-(b)) & 0x8000000000000000LL) == 0 ? \
(( (a) & ((b)^0x8000000000000000LL) & 0x8000000000000000LL) ? SKP_int64_MIN : (a)-(b)) : \
((((a)^0x8000000000000000LL) & (b) & 0x8000000000000000LL) ? SKP_int64_MAX : (a)-(b)) )
/* Saturation for positive input values */
#define SKP_POS_SAT32(a) ((a) > SKP_int32_MAX ? SKP_int32_MAX : (a))
/* Add with saturation for positive input values */
#define SKP_ADD_POS_SAT8(a, b) ((((a)+(b)) & 0x80) ? SKP_int8_MAX : ((a)+(b)))
#define SKP_ADD_POS_SAT16(a, b) ((((a)+(b)) & 0x8000) ? SKP_int16_MAX : ((a)+(b)))
#define SKP_ADD_POS_SAT32(a, b) ((((a)+(b)) & 0x80000000) ? SKP_int32_MAX : ((a)+(b)))
#define SKP_ADD_POS_SAT64(a, b) ((((a)+(b)) & 0x8000000000000000LL) ? SKP_int64_MAX : ((a)+(b)))
#define SKP_LSHIFT8(a, shift) ((a)<<(shift)) /* shift >= 0, shift < 8 */
#define SKP_LSHIFT16(a, shift) ((a)<<(shift)) /* shift >= 0, shift < 16 */
#define SKP_LSHIFT32(a, shift) ((a)<<(shift)) /* shift >= 0, shift < 32 */
#define SKP_LSHIFT64(a, shift) ((a)<<(shift)) /* shift >= 0, shift < 64 */
#define SKP_LSHIFT(a, shift) SKP_LSHIFT32(a, shift) /* shift >= 0, shift < 32 */
#define SKP_RSHIFT8(a, shift) ((a)>>(shift)) /* shift >= 0, shift < 8 */
#define SKP_RSHIFT16(a, shift) ((a)>>(shift)) /* shift >= 0, shift < 16 */
#define SKP_RSHIFT32(a, shift) ((a)>>(shift)) /* shift >= 0, shift < 32 */
#define SKP_RSHIFT64(a, shift) ((a)>>(shift)) /* shift >= 0, shift < 64 */
#define SKP_RSHIFT(a, shift) SKP_RSHIFT32(a, shift) /* shift >= 0, shift < 32 */
/* saturates before shifting */
#define SKP_LSHIFT_SAT16(a, shift) (SKP_LSHIFT16( SKP_LIMIT( (a), SKP_RSHIFT16( SKP_int16_MIN, (shift) ), \
SKP_RSHIFT16( SKP_int16_MAX, (shift) ) ), (shift) ))
#define SKP_LSHIFT_SAT32(a, shift) (SKP_LSHIFT32( SKP_LIMIT( (a), SKP_RSHIFT32( SKP_int32_MIN, (shift) ), \
SKP_RSHIFT32( SKP_int32_MAX, (shift) ) ), (shift) ))
#define SKP_LSHIFT_ovflw(a, shift) ((a)<<(shift)) /* shift >= 0, allowed to overflow */
#define SKP_LSHIFT_uint(a, shift) ((a)<<(shift)) /* shift >= 0 */
#define SKP_RSHIFT_uint(a, shift) ((a)>>(shift)) /* shift >= 0 */
#define SKP_ADD_LSHIFT(a, b, shift) ((a) + SKP_LSHIFT((b), (shift))) /* shift >= 0 */
#define SKP_ADD_LSHIFT32(a, b, shift) SKP_ADD32((a), SKP_LSHIFT32((b), (shift))) /* shift >= 0 */
#define SKP_ADD_LSHIFT_uint(a, b, shift) ((a) + SKP_LSHIFT_uint((b), (shift))) /* shift >= 0 */
#define SKP_ADD_RSHIFT(a, b, shift) ((a) + SKP_RSHIFT((b), (shift))) /* shift >= 0 */
#define SKP_ADD_RSHIFT32(a, b, shift) SKP_ADD32((a), SKP_RSHIFT32((b), (shift))) /* shift >= 0 */
#define SKP_ADD_RSHIFT_uint(a, b, shift) ((a) + SKP_RSHIFT_uint((b), (shift))) /* shift >= 0 */
#define SKP_SUB_LSHIFT32(a, b, shift) SKP_SUB32((a), SKP_LSHIFT32((b), (shift))) /* shift >= 0 */
#define SKP_SUB_RSHIFT32(a, b, shift) SKP_SUB32((a), SKP_RSHIFT32((b), (shift))) /* shift >= 0 */
/* Requires that shift > 0 */
#define SKP_RSHIFT_ROUND(a, shift) ((shift) == 1 ? ((a) >> 1) + ((a) & 1) : (((a) >> ((shift) - 1)) + 1) >> 1)
#define SKP_RSHIFT_ROUND64(a, shift) ((shift) == 1 ? ((a) >> 1) + ((a) & 1) : (((a) >> ((shift) - 1)) + 1) >> 1)
/* Number of rightshift required to fit the multiplication */
#define SKP_NSHIFT_MUL_32_32(a, b) ( -(31- (32-silk_CLZ32(SKP_abs(a)) + (32-silk_CLZ32(SKP_abs(b))))) )
#define SKP_NSHIFT_MUL_16_16(a, b) ( -(15- (16-silk_CLZ16(SKP_abs(a)) + (16-silk_CLZ16(SKP_abs(b))))) )
#define SKP_min(a, b) (((a) < (b)) ? (a) : (b))
#define SKP_max(a, b) (((a) > (b)) ? (a) : (b))
/* Macro to convert floating-point constants to fixed-point */
#define SILK_FIX_CONST( C, Q ) ((opus_int32)((C) * ((opus_int64)1 << (Q)) + 0.5))
/* SKP_min() versions with typecast in the function call */
static inline opus_int SKP_min_int(opus_int a, opus_int b)
{
return (((a) < (b)) ? (a) : (b));
}
static inline opus_int16 SKP_min_16(opus_int16 a, opus_int16 b)
{
return (((a) < (b)) ? (a) : (b));
}
static inline opus_int32 SKP_min_32(opus_int32 a, opus_int32 b)
{
return (((a) < (b)) ? (a) : (b));
}
static inline opus_int64 SKP_min_64(opus_int64 a, opus_int64 b)
{
return (((a) < (b)) ? (a) : (b));
}
/* SKP_min() versions with typecast in the function call */
static inline opus_int SKP_max_int(opus_int a, opus_int b)
{
return (((a) > (b)) ? (a) : (b));
}
static inline opus_int16 SKP_max_16(opus_int16 a, opus_int16 b)
{
return (((a) > (b)) ? (a) : (b));
}
static inline opus_int32 SKP_max_32(opus_int32 a, opus_int32 b)
{
return (((a) > (b)) ? (a) : (b));
}
static inline opus_int64 SKP_max_64(opus_int64 a, opus_int64 b)
{
return (((a) > (b)) ? (a) : (b));
}
#define SKP_LIMIT( a, limit1, limit2) ((limit1) > (limit2) ? ((a) > (limit1) ? (limit1) : ((a) < (limit2) ? (limit2) : (a))) \
: ((a) > (limit2) ? (limit2) : ((a) < (limit1) ? (limit1) : (a))))
#define SKP_LIMIT_int SKP_LIMIT
#define SKP_LIMIT_16 SKP_LIMIT
#define SKP_LIMIT_32 SKP_LIMIT
/*#define SKP_non_neg(a) ((a) & ((-(a)) >> (8 * sizeof(a) - 1)))*/ /* doesn't seem faster than SKP_max(0, a);*/
#define SKP_abs(a) (((a) > 0) ? (a) : -(a)) /* Be careful, SKP_abs returns wrong when input equals to SKP_intXX_MIN */
#define SKP_abs_int(a) (((a) ^ ((a) >> (8 * sizeof(a) - 1))) - ((a) >> (8 * sizeof(a) - 1)))
#define SKP_abs_int32(a) (((a) ^ ((a) >> 31)) - ((a) >> 31))
#define SKP_abs_int64(a) (((a) > 0) ? (a) : -(a))
#define SKP_sign(a) ((a) > 0 ? 1 : ( (a) < 0 ? -1 : 0 ))
#define SKP_sqrt(a) (sqrt(a))
/* PSEUDO-RANDOM GENERATOR */
/* Make sure to store the result as the seed for the next call (also in between */
/* frames), otherwise result won't be random at all. When only using some of the */
/* bits, take the most significant bits by right-shifting. */
#define SKP_RAND(seed) (SKP_MLA_ovflw(907633515, (seed), 196314165))
/* Add some multiplication functions that can be easily mapped to ARM. */
/* SKP_SMMUL: Signed top word multiply.
ARMv6 2 instruction cycles.
ARMv3M+ 3 instruction cycles. use SMULL and ignore LSB registers.(except xM)*/
/*#define SKP_SMMUL(a32, b32) (opus_int32)SKP_RSHIFT(SKP_SMLAL(SKP_SMULWB((a32), (b32)), (a32), SKP_RSHIFT_ROUND((b32), 16)), 16)*/
/* the following seems faster on x86 */
#define SKP_SMMUL(a32, b32) (opus_int32)SKP_RSHIFT64(SKP_SMULL((a32), (b32)), 32)
#include "silk_Inlines.h"
#include "silk_MacroCount.h"
#include "silk_MacroDebug.h"
#ifdef __cplusplus
}
#endif
#endif