diff options
Diffstat (limited to 'silk/fixed/find_LTP_FIX.c')
| -rw-r--r-- | silk/fixed/find_LTP_FIX.c | 78 |
1 files changed, 39 insertions, 39 deletions
diff --git a/silk/fixed/find_LTP_FIX.c b/silk/fixed/find_LTP_FIX.c index 4eadd134..aea6fc01 100644 --- a/silk/fixed/find_LTP_FIX.c +++ b/silk/fixed/find_LTP_FIX.c @@ -33,9 +33,9 @@ POSSIBILITY OF SUCH DAMAGE. #include "tuning_parameters.h" void silk_find_LTP_FIX( - opus_int32 XXLTP_Q17[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Correlation matrix */ - opus_int32 xXLTP_Q17[ MAX_NB_SUBFR * LTP_ORDER ], /* O Correlation vector */ - const opus_int16 r_ptr[], /* I Residual signal after LPC */ + opus_int32 XXLTP_Q17[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Correlation matrix */ + opus_int32 xXLTP_Q17[ MAX_NB_SUBFR * LTP_ORDER ], /* O Correlation vector */ + const opus_int16 r_ptr[], /* I Residual signal after LPC */ const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */ const opus_int subfr_length, /* I Subframe length */ const opus_int nb_subfr, /* I Number of subframes */ @@ -43,56 +43,56 @@ void silk_find_LTP_FIX( ) { opus_int i, k, extra_shifts; - opus_int xx_shifts, xX_shifts, XX_shifts; + opus_int xx_shifts, xX_shifts, XX_shifts; const opus_int16 *lag_ptr; opus_int32 *XXLTP_Q17_ptr, *xXLTP_Q17_ptr; - opus_int32 xx, nrg, temp; + opus_int32 xx, nrg, temp; xXLTP_Q17_ptr = xXLTP_Q17; XXLTP_Q17_ptr = XXLTP_Q17; for( k = 0; k < nb_subfr; k++ ) { lag_ptr = r_ptr - ( lag[ k ] + LTP_ORDER / 2 ); - silk_sum_sqr_shift( &xx, &xx_shifts, r_ptr, subfr_length ); /* xx in Q( -xx_shifts ) */ - silk_corrMatrix_FIX( lag_ptr, subfr_length, LTP_ORDER, XXLTP_Q17_ptr, &nrg, &XX_shifts, arch ); /* XXLTP_Q17_ptr and nrg in Q( -XX_shifts ) */ - extra_shifts = xx_shifts - XX_shifts; - if( extra_shifts > 0 ) { - /* Shift XX */ - xX_shifts = xx_shifts; - for( i = 0; i < LTP_ORDER * LTP_ORDER; i++ ) { - XXLTP_Q17_ptr[ i ] = silk_RSHIFT32( XXLTP_Q17_ptr[ i ], extra_shifts ); /* Q( -xX_shifts ) */ - } - nrg = silk_RSHIFT32( nrg, extra_shifts ); /* Q( -xX_shifts ) */ - } else if( extra_shifts < 0 ) { - /* Shift xx */ - xX_shifts = XX_shifts; - xx = silk_RSHIFT32( xx, -extra_shifts ); /* Q( -xX_shifts ) */ - } else { - xX_shifts = xx_shifts; - } - silk_corrVector_FIX( lag_ptr, r_ptr, subfr_length, LTP_ORDER, xXLTP_Q17_ptr, xX_shifts, arch ); /* xXLTP_Q17_ptr in Q( -xX_shifts ) */ + silk_sum_sqr_shift( &xx, &xx_shifts, r_ptr, subfr_length ); /* xx in Q( -xx_shifts ) */ + silk_corrMatrix_FIX( lag_ptr, subfr_length, LTP_ORDER, XXLTP_Q17_ptr, &nrg, &XX_shifts, arch ); /* XXLTP_Q17_ptr and nrg in Q( -XX_shifts ) */ + extra_shifts = xx_shifts - XX_shifts; + if( extra_shifts > 0 ) { + /* Shift XX */ + xX_shifts = xx_shifts; + for( i = 0; i < LTP_ORDER * LTP_ORDER; i++ ) { + XXLTP_Q17_ptr[ i ] = silk_RSHIFT32( XXLTP_Q17_ptr[ i ], extra_shifts ); /* Q( -xX_shifts ) */ + } + nrg = silk_RSHIFT32( nrg, extra_shifts ); /* Q( -xX_shifts ) */ + } else if( extra_shifts < 0 ) { + /* Shift xx */ + xX_shifts = XX_shifts; + xx = silk_RSHIFT32( xx, -extra_shifts ); /* Q( -xX_shifts ) */ + } else { + xX_shifts = xx_shifts; + } + silk_corrVector_FIX( lag_ptr, r_ptr, subfr_length, LTP_ORDER, xXLTP_Q17_ptr, xX_shifts, arch ); /* xXLTP_Q17_ptr in Q( -xX_shifts ) */ - /* At this point all correlations are in Q(-xX_shifts) */ - temp = silk_SMLAWB( 1, nrg, SILK_FIX_CONST( LTP_CORR_INV_MAX, 16 ) ); - temp = silk_max( temp, xx ); + /* At this point all correlations are in Q(-xX_shifts) */ + temp = silk_SMLAWB( 1, nrg, SILK_FIX_CONST( LTP_CORR_INV_MAX, 16 ) ); + temp = silk_max( temp, xx ); TIC(div) #if 0 - for( i = 0; i < LTP_ORDER * LTP_ORDER; i++ ) { - XXLTP_Q17_ptr[ i ] = silk_DIV32_varQ( XXLTP_Q17_ptr[ i ], temp, 17 ); - } - for( i = 0; i < LTP_ORDER; i++ ) { - xXLTP_Q17_ptr[ i ] = silk_DIV32_varQ( xXLTP_Q17_ptr[ i ], temp, 17 ); - } + for( i = 0; i < LTP_ORDER * LTP_ORDER; i++ ) { + XXLTP_Q17_ptr[ i ] = silk_DIV32_varQ( XXLTP_Q17_ptr[ i ], temp, 17 ); + } + for( i = 0; i < LTP_ORDER; i++ ) { + xXLTP_Q17_ptr[ i ] = silk_DIV32_varQ( xXLTP_Q17_ptr[ i ], temp, 17 ); + } #else - for( i = 0; i < LTP_ORDER * LTP_ORDER; i++ ) { - XXLTP_Q17_ptr[ i ] = (opus_int32)( ( ((opus_int64)XXLTP_Q17_ptr[ i ]) << 17 ) / temp ); - } - for( i = 0; i < LTP_ORDER; i++ ) { - xXLTP_Q17_ptr[ i ] = (opus_int32)( ( ((opus_int64)xXLTP_Q17_ptr[ i ]) << 17 ) / temp ); - } + for( i = 0; i < LTP_ORDER * LTP_ORDER; i++ ) { + XXLTP_Q17_ptr[ i ] = (opus_int32)( ( ((opus_int64)XXLTP_Q17_ptr[ i ]) << 17 ) / temp ); + } + for( i = 0; i < LTP_ORDER; i++ ) { + xXLTP_Q17_ptr[ i ] = (opus_int32)( ( ((opus_int64)xXLTP_Q17_ptr[ i ]) << 17 ) / temp ); + } #endif TOC(div) - r_ptr += subfr_length; + r_ptr += subfr_length; XXLTP_Q17_ptr += LTP_ORDER * LTP_ORDER; xXLTP_Q17_ptr += LTP_ORDER; } |