ref: a01b0ab22bcadf3ac89efc82cdae90db66cba14d
dir: /silk/fixed/mips/warped_autocorrelation_FIX_mipsr1.h/
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#ifndef __WARPED_AUTOCORRELATION_FIX_MIPSR1_H__
#define __WARPED_AUTOCORRELATION_FIX_MIPSR1_H__
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "main_FIX.h"
#undef QC
#define QC 10
#undef QS
#define QS 14
/* Autocorrelations for a warped frequency axis */
#define OVERRIDE_silk_warped_autocorrelation_FIX
void silk_warped_autocorrelation_FIX(
opus_int32 *corr, /* O Result [order + 1] */
opus_int *scale, /* O Scaling of the correlation vector */
const opus_int16 *input, /* I Input data to correlate */
const opus_int warping_Q16, /* I Warping coefficient */
const opus_int length, /* I Length of input */
const opus_int order /* I Correlation order (even) */
)
{
opus_int n, i, lsh;
opus_int32 tmp1_QS=0, tmp2_QS=0, tmp3_QS=0, tmp4_QS=0, tmp5_QS=0, tmp6_QS=0, tmp7_QS=0, tmp8_QS=0, start_1=0, start_2=0, start_3=0;
opus_int32 state_QS[ MAX_SHAPE_LPC_ORDER + 1 ] = { 0 };
opus_int64 corr_QC[ MAX_SHAPE_LPC_ORDER + 1 ] = { 0 };
opus_int64 temp64;
opus_int32 val;
val = 2 * QS - QC;
/* Order must be even */
silk_assert( ( order & 1 ) == 0 );
silk_assert( 2 * QS - QC >= 0 );
/* Loop over samples */
for( n = 0; n < length; n=n+4 ) {
tmp1_QS = silk_LSHIFT32( (opus_int32)input[ n ], QS );
start_1 = tmp1_QS;
tmp3_QS = silk_LSHIFT32( (opus_int32)input[ n+1], QS );
start_2 = tmp3_QS;
tmp5_QS = silk_LSHIFT32( (opus_int32)input[ n+2], QS );
start_3 = tmp5_QS;
tmp7_QS = silk_LSHIFT32( (opus_int32)input[ n+3], QS );
/* Loop over allpass sections */
for( i = 0; i < order; i += 2 ) {
/* Output of allpass section */
tmp2_QS = silk_SMLAWB( state_QS[ i ], state_QS[ i + 1 ] - tmp1_QS, warping_Q16 );
corr_QC[ i ] = __builtin_mips_madd( corr_QC[ i ], tmp1_QS, start_1);
tmp4_QS = silk_SMLAWB( tmp1_QS, tmp2_QS - tmp3_QS, warping_Q16 );
corr_QC[ i ] = __builtin_mips_madd( corr_QC[ i ], tmp3_QS, start_2);
tmp6_QS = silk_SMLAWB( tmp3_QS, tmp4_QS - tmp5_QS, warping_Q16 );
corr_QC[ i ] = __builtin_mips_madd( corr_QC[ i ], tmp5_QS, start_3);
tmp8_QS = silk_SMLAWB( tmp5_QS, tmp6_QS - tmp7_QS, warping_Q16 );
state_QS[ i ] = tmp7_QS;
corr_QC[ i ] = __builtin_mips_madd( corr_QC[ i ], tmp7_QS, state_QS[0]);
/* Output of allpass section */
tmp1_QS = silk_SMLAWB( state_QS[ i + 1 ], state_QS[ i + 2 ] - tmp2_QS, warping_Q16 );
corr_QC[ i+1 ] = __builtin_mips_madd( corr_QC[ i+1 ], tmp2_QS, start_1);
tmp3_QS = silk_SMLAWB( tmp2_QS, tmp1_QS - tmp4_QS, warping_Q16 );
corr_QC[ i+1 ] = __builtin_mips_madd( corr_QC[ i+1 ], tmp4_QS, start_2);
tmp5_QS = silk_SMLAWB( tmp4_QS, tmp3_QS - tmp6_QS, warping_Q16 );
corr_QC[ i+1 ] = __builtin_mips_madd( corr_QC[ i+1 ], tmp6_QS, start_3);
tmp7_QS = silk_SMLAWB( tmp6_QS, tmp5_QS - tmp8_QS, warping_Q16 );
state_QS[ i + 1 ] = tmp8_QS;
corr_QC[ i+1 ] = __builtin_mips_madd( corr_QC[ i+1 ], tmp8_QS, state_QS[ 0 ]);
}
state_QS[ order ] = tmp7_QS;
corr_QC[ order ] = __builtin_mips_madd( corr_QC[ order ], tmp1_QS, start_1);
corr_QC[ order ] = __builtin_mips_madd( corr_QC[ order ], tmp3_QS, start_2);
corr_QC[ order ] = __builtin_mips_madd( corr_QC[ order ], tmp5_QS, start_3);
corr_QC[ order ] = __builtin_mips_madd( corr_QC[ order ], tmp7_QS, state_QS[ 0 ]);
}
for(;n< length; n++ ) {
tmp1_QS = silk_LSHIFT32( (opus_int32)input[ n ], QS );
/* Loop over allpass sections */
for( i = 0; i < order; i += 2 ) {
/* Output of allpass section */
tmp2_QS = silk_SMLAWB( state_QS[ i ], state_QS[ i + 1 ] - tmp1_QS, warping_Q16 );
state_QS[ i ] = tmp1_QS;
corr_QC[ i ] = __builtin_mips_madd( corr_QC[ i ], tmp1_QS, state_QS[ 0 ]);
/* Output of allpass section */
tmp1_QS = silk_SMLAWB( state_QS[ i + 1 ], state_QS[ i + 2 ] - tmp2_QS, warping_Q16 );
state_QS[ i + 1 ] = tmp2_QS;
corr_QC[ i+1 ] = __builtin_mips_madd( corr_QC[ i+1 ], tmp2_QS, state_QS[ 0 ]);
}
state_QS[ order ] = tmp1_QS;
corr_QC[ order ] = __builtin_mips_madd( corr_QC[ order ], tmp1_QS, state_QS[ 0 ]);
}
temp64 = corr_QC[ 0 ];
temp64 = __builtin_mips_shilo(temp64, val);
lsh = silk_CLZ64( temp64 ) - 35;
lsh = silk_LIMIT( lsh, -12 - QC, 30 - QC );
*scale = -( QC + lsh );
silk_assert( *scale >= -30 && *scale <= 12 );
if( lsh >= 0 ) {
for( i = 0; i < order + 1; i++ ) {
temp64 = corr_QC[ i ];
//temp64 = __builtin_mips_shilo(temp64, val);
temp64 = (val >= 0) ? (temp64 >> val) : (temp64 << -val);
corr[ i ] = (opus_int32)silk_CHECK_FIT32( __builtin_mips_shilo( temp64, -lsh ) );
}
} else {
for( i = 0; i < order + 1; i++ ) {
temp64 = corr_QC[ i ];
//temp64 = __builtin_mips_shilo(temp64, val);
temp64 = (val >= 0) ? (temp64 >> val) : (temp64 << -val);
corr[ i ] = (opus_int32)silk_CHECK_FIT32( __builtin_mips_shilo( temp64, -lsh ) );
}
}
corr_QC[ 0 ] = __builtin_mips_shilo(corr_QC[ 0 ], val);
silk_assert( corr_QC[ 0 ] >= 0 ); /* If breaking, decrease QC*/
}
#endif /* __WARPED_AUTOCORRELATION_FIX_MIPSR1_H__ */