media/libopus/silk/float/scale_copy_vector_FLP.c

changeset 0
6474c204b198
     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/media/libopus/silk/float/scale_copy_vector_FLP.c	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,57 @@
     1.4 +/***********************************************************************
     1.5 +Copyright (c) 2006-2011, Skype Limited. All rights reserved.
     1.6 +Redistribution and use in source and binary forms, with or without
     1.7 +modification, are permitted provided that the following conditions
     1.8 +are met:
     1.9 +- Redistributions of source code must retain the above copyright notice,
    1.10 +this list of conditions and the following disclaimer.
    1.11 +- Redistributions in binary form must reproduce the above copyright
    1.12 +notice, this list of conditions and the following disclaimer in the
    1.13 +documentation and/or other materials provided with the distribution.
    1.14 +- Neither the name of Internet Society, IETF or IETF Trust, nor the
    1.15 +names of specific contributors, may be used to endorse or promote
    1.16 +products derived from this software without specific prior written
    1.17 +permission.
    1.18 +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    1.19 +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    1.20 +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    1.21 +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    1.22 +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    1.23 +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    1.24 +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    1.25 +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    1.26 +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    1.27 +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    1.28 +POSSIBILITY OF SUCH DAMAGE.
    1.29 +***********************************************************************/
    1.30 +
    1.31 +#ifdef HAVE_CONFIG_H
    1.32 +#include "config.h"
    1.33 +#endif
    1.34 +
    1.35 +#include "SigProc_FLP.h"
    1.36 +
    1.37 +/* copy and multiply a vector by a constant */
    1.38 +void silk_scale_copy_vector_FLP(
    1.39 +    silk_float          *data_out,
    1.40 +    const silk_float    *data_in,
    1.41 +    silk_float          gain,
    1.42 +    opus_int            dataSize
    1.43 +)
    1.44 +{
    1.45 +    opus_int  i, dataSize4;
    1.46 +
    1.47 +    /* 4x unrolled loop */
    1.48 +    dataSize4 = dataSize & 0xFFFC;
    1.49 +    for( i = 0; i < dataSize4; i += 4 ) {
    1.50 +        data_out[ i + 0 ] = gain * data_in[ i + 0 ];
    1.51 +        data_out[ i + 1 ] = gain * data_in[ i + 1 ];
    1.52 +        data_out[ i + 2 ] = gain * data_in[ i + 2 ];
    1.53 +        data_out[ i + 3 ] = gain * data_in[ i + 3 ];
    1.54 +    }
    1.55 +
    1.56 +    /* any remaining elements */
    1.57 +    for( ; i < dataSize; i++ ) {
    1.58 +        data_out[ i ] = gain * data_in[ i ];
    1.59 +    }
    1.60 +}

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