mirror of
https://github.com/signalwire/freeswitch.git
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5bb9d2062e
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@17026 d0543943-73ff-0310-b7d9-9358b9ac24b2
123 lines
4.9 KiB
C
123 lines
4.9 KiB
C
/***********************************************************************
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Copyright (c) 2006-2010, Skype Limited. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, (subject to the limitations in the disclaimer below)
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are permitted provided that the following conditions are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Skype Limited, nor the names of specific
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contributors, may be used to endorse or promote products derived from
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this software without specific prior written permission.
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NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
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BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#include "SKP_Silk_SigProc_FIX.h"
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/* Multiply a vector by a constant */
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void SKP_Silk_scale_vector16_Q14(
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SKP_int16 *data1,
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SKP_int gain_Q14, /* Gain in Q14 */
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SKP_int dataSize
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)
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{
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SKP_int i;
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SKP_int32 data32, gain_Q16;
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SKP_assert( gain_Q14 < 32768 );
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SKP_assert( gain_Q14 >= -32768 );
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gain_Q16 = SKP_LSHIFT( gain_Q14, 2 );
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if( (SKP_int32)( (SKP_int_ptr_size)data1 & 3 ) != 0 ) {
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/* Input is not 4-byte aligned */
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data1[ 0 ] = SKP_SMULWB( gain_Q16, data1[ 0 ] );
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i = 1;
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} else {
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i = 0;
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}
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dataSize--;
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for( ; i < dataSize; i += 2 ) {
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data32 = *( (SKP_int32 *)&data1[ i ] ); /* load two values at once */
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data1[ i ] = SKP_SMULWB( gain_Q16, data32 );
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data1[ i + 1 ] = SKP_SMULWT( gain_Q16, data32 );
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}
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if( i == dataSize ) {
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/* One sample left to process */
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data1[ i ] = SKP_SMULWB( gain_Q16, data1[ i ] );
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}
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}
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/* Multiply a vector by a constant */
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void SKP_Silk_scale_vector32_Q26_lshift_18(
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SKP_int32 *data1, /* (I/O): Q0/Q18 */
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SKP_int32 gain_Q26, /* (I): Q26 */
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SKP_int dataSize /* (I): length */
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)
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{
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SKP_int i;
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for( i = 0; i < dataSize; i++ ) {
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data1[ i ] = (SKP_int32)SKP_CHECK_FIT32( SKP_RSHIFT64( SKP_SMULL( data1[ i ], gain_Q26 ), 8 ) );// OUTPUT: Q18
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}
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}
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/* Multiply a vector by a constant */
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void SKP_Silk_scale_vector32_16_Q14(
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SKP_int32 *data1, /* (I/O): Q0/Q0 */
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SKP_int gain_Q14, /* (I): Q14 */
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SKP_int dataSize /* (I): length */
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)
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{
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SKP_int i, gain_Q16;
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if( gain_Q14 < ( SKP_int16_MAX >> 2 ) ) {
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gain_Q16 = SKP_LSHIFT( gain_Q14, 2 );
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for( i = 0; i < dataSize; i++ ) {
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data1[ i ] = SKP_SMULWB( data1[ i ], gain_Q16 );
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}
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} else {
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SKP_assert( gain_Q14 >= SKP_int16_MIN );
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for( i = 0; i < dataSize; i++ ) {
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data1[ i ] = SKP_LSHIFT( SKP_SMULWB( data1[ i ], gain_Q14 ), 2 );
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}
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}
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}
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/* Multiply a vector by a constant, does not saturate output data */
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void SKP_Silk_scale_vector32_Q16(
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SKP_int32 *data1, /* (I/O): Q0/Q0 */
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SKP_int32 gain_Q16, /* (I): gain in Q16 ( SKP_int16_MIN <= gain_Q16 <= SKP_int16_MAX + 65536 ) */
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const SKP_int dataSize /* (I): length */
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)
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{
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SKP_int i;
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SKP_assert( gain_Q16 <= SKP_int16_MAX + 65536 );
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SKP_assert( gain_Q16 >= SKP_int16_MIN );
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if( gain_Q16 > SKP_int16_MAX ) {
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gain_Q16 -= 65536;
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for( i = 0; i < dataSize; i++ ) {
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data1[ i ] = SKP_SMLAWB( data1[ i ], data1[ i ], gain_Q16 );
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}
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} else {
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for( i = 0; i < dataSize; i++ ) {
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data1[ i ] = SKP_SMULWB( data1[ i ], gain_Q16 );
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}
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}
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}
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