diff options
Diffstat (limited to 'src/opus-1.0.2/silk/fixed/autocorr_FIX.c')
-rw-r--r-- | src/opus-1.0.2/silk/fixed/autocorr_FIX.c | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/src/opus-1.0.2/silk/fixed/autocorr_FIX.c b/src/opus-1.0.2/silk/fixed/autocorr_FIX.c deleted file mode 100644 index c2ebb6a9..00000000 --- a/src/opus-1.0.2/silk/fixed/autocorr_FIX.c +++ /dev/null @@ -1,76 +0,0 @@ -/*********************************************************************** -Copyright (c) 2006-2011, Skype Limited. All rights reserved. -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions -are met: -- Redistributions of source code must retain the above copyright notice, -this list of conditions and the following disclaimer. -- Redistributions in binary form must reproduce the above copyright -notice, this list of conditions and the following disclaimer in the -documentation and/or other materials provided with the distribution. -- Neither the name of Internet Society, IETF or IETF Trust, nor the -names of specific contributors, may be used to endorse or promote -products derived from this software without specific prior written -permission. -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” -AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE -LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR -CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -POSSIBILITY OF SUCH DAMAGE. -***********************************************************************/ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "SigProc_FIX.h" - -/* 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 */ -) -{ - opus_int i, lz, nRightShifts, corrCount; - opus_int64 corr64; - - corrCount = silk_min_int( inputDataSize, correlationCount ); - - /* compute energy (zero-lag correlation) */ - corr64 = silk_inner_prod16_aligned_64( inputData, inputData, inputDataSize ); - - /* deal with all-zero input data */ - corr64 += 1; - - /* number of leading zeros */ - lz = silk_CLZ64( corr64 ); - - /* scaling: number of right shifts applied to correlations */ - nRightShifts = 35 - lz; - *scale = nRightShifts; - - if( nRightShifts <= 0 ) { - results[ 0 ] = silk_LSHIFT( (opus_int32)silk_CHECK_FIT32( corr64 ), -nRightShifts ); - - /* compute remaining correlations based on int32 inner product */ - for( i = 1; i < corrCount; i++ ) { - results[ i ] = silk_LSHIFT( silk_inner_prod_aligned( inputData, inputData + i, inputDataSize - i ), -nRightShifts ); - } - } else { - results[ 0 ] = (opus_int32)silk_CHECK_FIT32( silk_RSHIFT64( corr64, nRightShifts ) ); - - /* compute remaining correlations based on int64 inner product */ - for( i = 1; i < corrCount; i++ ) { - results[ i ] = (opus_int32)silk_CHECK_FIT32( silk_RSHIFT64( silk_inner_prod16_aligned_64( inputData, inputData + i, inputDataSize - i ), nRightShifts ) ); - } - } -} |