995dcb610c
Took the opportunity to undo the Godot changed made to the
opus source. The opus module should eventually be built in its
own environment to avoid polluting others with too many include
dirs and defines.
TODO: Fix the platform/ stuff for opus.
(cherry picked from commit d9a291f641)
speex module was only added while cherry-picking, as speex is removed
in the master branch but we don't want to break compatibility in 2.1.x.
Unbundling wasn't done as the module uses the internal speex_free,
so it would require some more work.
154 lines
6.1 KiB
C
154 lines
6.1 KiB
C
/***********************************************************************
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Copyright (c) 2006-2011, 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, are permitted provided that the following conditions
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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 Internet Society, IETF or IETF Trust, nor the
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names of specific contributors, may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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/* Insertion sort (fast for already almost sorted arrays): */
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/* Best case: O(n) for an already sorted array */
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/* Worst case: O(n^2) for an inversely sorted array */
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/* */
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/* Shell short: http://en.wikipedia.org/wiki/Shell_sort */
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#include "SigProc_FIX.h"
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void silk_insertion_sort_increasing(
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opus_int32 *a, /* I/O Unsorted / Sorted vector */
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opus_int *idx, /* O Index vector for the sorted elements */
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const opus_int L, /* I Vector length */
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const opus_int K /* I Number of correctly sorted positions */
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)
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{
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opus_int32 value;
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opus_int i, j;
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/* Safety checks */
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silk_assert( K > 0 );
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silk_assert( L > 0 );
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silk_assert( L >= K );
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/* Write start indices in index vector */
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for( i = 0; i < K; i++ ) {
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idx[ i ] = i;
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}
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/* Sort vector elements by value, increasing order */
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for( i = 1; i < K; i++ ) {
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value = a[ i ];
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for( j = i - 1; ( j >= 0 ) && ( value < a[ j ] ); j-- ) {
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a[ j + 1 ] = a[ j ]; /* Shift value */
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idx[ j + 1 ] = idx[ j ]; /* Shift index */
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}
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a[ j + 1 ] = value; /* Write value */
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idx[ j + 1 ] = i; /* Write index */
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}
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/* If less than L values are asked for, check the remaining values, */
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/* but only spend CPU to ensure that the K first values are correct */
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for( i = K; i < L; i++ ) {
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value = a[ i ];
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if( value < a[ K - 1 ] ) {
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for( j = K - 2; ( j >= 0 ) && ( value < a[ j ] ); j-- ) {
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a[ j + 1 ] = a[ j ]; /* Shift value */
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idx[ j + 1 ] = idx[ j ]; /* Shift index */
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}
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a[ j + 1 ] = value; /* Write value */
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idx[ j + 1 ] = i; /* Write index */
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}
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}
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}
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#ifdef FIXED_POINT
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/* This function is only used by the fixed-point build */
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void silk_insertion_sort_decreasing_int16(
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opus_int16 *a, /* I/O Unsorted / Sorted vector */
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opus_int *idx, /* O Index vector for the sorted elements */
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const opus_int L, /* I Vector length */
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const opus_int K /* I Number of correctly sorted positions */
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)
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{
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opus_int i, j;
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opus_int value;
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/* Safety checks */
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silk_assert( K > 0 );
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silk_assert( L > 0 );
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silk_assert( L >= K );
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/* Write start indices in index vector */
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for( i = 0; i < K; i++ ) {
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idx[ i ] = i;
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}
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/* Sort vector elements by value, decreasing order */
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for( i = 1; i < K; i++ ) {
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value = a[ i ];
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for( j = i - 1; ( j >= 0 ) && ( value > a[ j ] ); j-- ) {
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a[ j + 1 ] = a[ j ]; /* Shift value */
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idx[ j + 1 ] = idx[ j ]; /* Shift index */
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}
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a[ j + 1 ] = value; /* Write value */
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idx[ j + 1 ] = i; /* Write index */
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}
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/* If less than L values are asked for, check the remaining values, */
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/* but only spend CPU to ensure that the K first values are correct */
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for( i = K; i < L; i++ ) {
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value = a[ i ];
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if( value > a[ K - 1 ] ) {
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for( j = K - 2; ( j >= 0 ) && ( value > a[ j ] ); j-- ) {
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a[ j + 1 ] = a[ j ]; /* Shift value */
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idx[ j + 1 ] = idx[ j ]; /* Shift index */
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}
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a[ j + 1 ] = value; /* Write value */
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idx[ j + 1 ] = i; /* Write index */
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}
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}
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}
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#endif
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void silk_insertion_sort_increasing_all_values_int16(
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opus_int16 *a, /* I/O Unsorted / Sorted vector */
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const opus_int L /* I Vector length */
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)
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{
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opus_int value;
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opus_int i, j;
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/* Safety checks */
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silk_assert( L > 0 );
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/* Sort vector elements by value, increasing order */
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for( i = 1; i < L; i++ ) {
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value = a[ i ];
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for( j = i - 1; ( j >= 0 ) && ( value < a[ j ] ); j-- ) {
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a[ j + 1 ] = a[ j ]; /* Shift value */
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}
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a[ j + 1 ] = value; /* Write value */
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}
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}
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