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authorhairball <xhairball@gmail.com>2014-02-08 03:21:02 +0000
committerTim Angus <tim@ngus.net>2014-06-17 17:43:38 +0100
commit35064811c0ac104acddd7777e00bfd9e054c2db6 (patch)
tree4063389141542093ecc3de47e3999ed099520621 /src/opus-1.0.2/silk/fixed/apply_sine_window_FIX.c
parent1778f3fb8cabe7400011c84331018b0ebf6a44b1 (diff)
Upgrade opus 1.0.2 -> 1.1
Diffstat (limited to 'src/opus-1.0.2/silk/fixed/apply_sine_window_FIX.c')
-rw-r--r--src/opus-1.0.2/silk/fixed/apply_sine_window_FIX.c101
1 files changed, 0 insertions, 101 deletions
diff --git a/src/opus-1.0.2/silk/fixed/apply_sine_window_FIX.c b/src/opus-1.0.2/silk/fixed/apply_sine_window_FIX.c
deleted file mode 100644
index 897fdc30..00000000
--- a/src/opus-1.0.2/silk/fixed/apply_sine_window_FIX.c
+++ /dev/null
@@ -1,101 +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"
-
-/* Apply sine window to signal vector. */
-/* Window types: */
-/* 1 -> sine window from 0 to pi/2 */
-/* 2 -> sine window from pi/2 to pi */
-/* Every other sample is linearly interpolated, for speed. */
-/* Window length must be between 16 and 120 (incl) and a multiple of 4. */
-
-/* Matlab code for table:
- for k=16:9*4:16+2*9*4, fprintf(' %7.d,', -round(65536*pi ./ (k:4:k+8*4))); fprintf('\n'); end
-*/
-static const opus_int16 freq_table_Q16[ 27 ] = {
- 12111, 9804, 8235, 7100, 6239, 5565, 5022, 4575, 4202,
- 3885, 3612, 3375, 3167, 2984, 2820, 2674, 2542, 2422,
- 2313, 2214, 2123, 2038, 1961, 1889, 1822, 1760, 1702,
-};
-
-void silk_apply_sine_window(
- opus_int16 px_win[], /* O Pointer to windowed signal */
- const opus_int16 px[], /* I Pointer to input signal */
- const opus_int win_type, /* I Selects a window type */
- const opus_int length /* I Window length, multiple of 4 */
-)
-{
- opus_int k, f_Q16, c_Q16;
- opus_int32 S0_Q16, S1_Q16;
-
- silk_assert( win_type == 1 || win_type == 2 );
-
- /* Length must be in a range from 16 to 120 and a multiple of 4 */
- silk_assert( length >= 16 && length <= 120 );
- silk_assert( ( length & 3 ) == 0 );
-
- /* Frequency */
- k = ( length >> 2 ) - 4;
- silk_assert( k >= 0 && k <= 26 );
- f_Q16 = (opus_int)freq_table_Q16[ k ];
-
- /* Factor used for cosine approximation */
- c_Q16 = silk_SMULWB( (opus_int32)f_Q16, -f_Q16 );
- silk_assert( c_Q16 >= -32768 );
-
- /* initialize state */
- if( win_type == 1 ) {
- /* start from 0 */
- S0_Q16 = 0;
- /* approximation of sin(f) */
- S1_Q16 = f_Q16 + silk_RSHIFT( length, 3 );
- } else {
- /* start from 1 */
- S0_Q16 = ( (opus_int32)1 << 16 );
- /* approximation of cos(f) */
- S1_Q16 = ( (opus_int32)1 << 16 ) + silk_RSHIFT( c_Q16, 1 ) + silk_RSHIFT( length, 4 );
- }
-
- /* Uses the recursive equation: sin(n*f) = 2 * cos(f) * sin((n-1)*f) - sin((n-2)*f) */
- /* 4 samples at a time */
- for( k = 0; k < length; k += 4 ) {
- px_win[ k ] = (opus_int16)silk_SMULWB( silk_RSHIFT( S0_Q16 + S1_Q16, 1 ), px[ k ] );
- px_win[ k + 1 ] = (opus_int16)silk_SMULWB( S1_Q16, px[ k + 1] );
- S0_Q16 = silk_SMULWB( S1_Q16, c_Q16 ) + silk_LSHIFT( S1_Q16, 1 ) - S0_Q16 + 1;
- S0_Q16 = silk_min( S0_Q16, ( (opus_int32)1 << 16 ) );
-
- px_win[ k + 2 ] = (opus_int16)silk_SMULWB( silk_RSHIFT( S0_Q16 + S1_Q16, 1 ), px[ k + 2] );
- px_win[ k + 3 ] = (opus_int16)silk_SMULWB( S0_Q16, px[ k + 3 ] );
- S1_Q16 = silk_SMULWB( S0_Q16, c_Q16 ) + silk_LSHIFT( S0_Q16, 1 ) - S1_Q16;
- S1_Q16 = silk_min( S1_Q16, ( (opus_int32)1 << 16 ) );
- }
-}