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Side by Side Diff: silk/NLSF_decode.c

Issue 107243004: Updating Opus to release 1.1 (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/deps/third_party/opus
Patch Set: Created 7 years ago
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1 /*********************************************************************** 1 /***********************************************************************
2 Copyright (c) 2006-2011, Skype Limited. All rights reserved. 2 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
3 Redistribution and use in source and binary forms, with or without 3 Redistribution and use in source and binary forms, with or without
4 modification, are permitted provided that the following conditions 4 modification, are permitted provided that the following conditions
5 are met: 5 are met:
6 - Redistributions of source code must retain the above copyright notice, 6 - Redistributions of source code must retain the above copyright notice,
7 this list of conditions and the following disclaimer. 7 this list of conditions and the following disclaimer.
8 - Redistributions in binary form must reproduce the above copyright 8 - Redistributions in binary form must reproduce the above copyright
9 notice, this list of conditions and the following disclaimer in the 9 notice, this list of conditions and the following disclaimer in the
10 documentation and/or other materials provided with the distribution. 10 documentation and/or other materials provided with the distribution.
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25 POSSIBILITY OF SUCH DAMAGE. 25 POSSIBILITY OF SUCH DAMAGE.
26 ***********************************************************************/ 26 ***********************************************************************/
27 27
28 #ifdef HAVE_CONFIG_H 28 #ifdef HAVE_CONFIG_H
29 #include "config.h" 29 #include "config.h"
30 #endif 30 #endif
31 31
32 #include "main.h" 32 #include "main.h"
33 33
34 /* Predictive dequantizer for NLSF residuals */ 34 /* Predictive dequantizer for NLSF residuals */
35 static inline void silk_NLSF_residual_dequant( /* O Returns RD value in Q30 */ 35 static OPUS_INLINE void silk_NLSF_residual_dequant( /* O Return s RD value in Q30 */
36 opus_int16 x_Q10[], /* O Output [ or der ] */ 36 opus_int16 x_Q10[], /* O Output [ or der ] */
37 const opus_int8 indices[], /* I Quantizatio n indices [ order ] */ 37 const opus_int8 indices[], /* I Quantizatio n indices [ order ] */
38 const opus_uint8 pred_coef_Q8[], /* I Backward pr edictor coefs [ order ] */ 38 const opus_uint8 pred_coef_Q8[], /* I Backward pr edictor coefs [ order ] */
39 const opus_int quant_step_size_Q16, /* I Quantizatio n step size */ 39 const opus_int quant_step_size_Q16, /* I Quantizatio n step size */
40 const opus_int16 order /* I Number of i nput values */ 40 const opus_int16 order /* I Number of i nput values */
41 ) 41 )
42 { 42 {
43 opus_int i, out_Q10, pred_Q10; 43 opus_int i, out_Q10, pred_Q10;
44 44
45 out_Q10 = 0; 45 out_Q10 = 0;
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92 /* Apply inverse square-rooted weights and add to output */ 92 /* Apply inverse square-rooted weights and add to output */
93 for( i = 0; i < psNLSF_CB->order; i++ ) { 93 for( i = 0; i < psNLSF_CB->order; i++ ) {
94 W_tmp_Q9 = silk_SQRT_APPROX( silk_LSHIFT( (opus_int32)W_tmp_QW[ i ], 18 - NLSF_W_Q ) ); 94 W_tmp_Q9 = silk_SQRT_APPROX( silk_LSHIFT( (opus_int32)W_tmp_QW[ i ], 18 - NLSF_W_Q ) );
95 NLSF_Q15_tmp = silk_ADD32( pNLSF_Q15[ i ], silk_DIV32_16( silk_LSHIFT( ( opus_int32)res_Q10[ i ], 14 ), W_tmp_Q9 ) ); 95 NLSF_Q15_tmp = silk_ADD32( pNLSF_Q15[ i ], silk_DIV32_16( silk_LSHIFT( ( opus_int32)res_Q10[ i ], 14 ), W_tmp_Q9 ) );
96 pNLSF_Q15[ i ] = (opus_int16)silk_LIMIT( NLSF_Q15_tmp, 0, 32767 ); 96 pNLSF_Q15[ i ] = (opus_int16)silk_LIMIT( NLSF_Q15_tmp, 0, 32767 );
97 } 97 }
98 98
99 /* NLSF stabilization */ 99 /* NLSF stabilization */
100 silk_NLSF_stabilize( pNLSF_Q15, psNLSF_CB->deltaMin_Q15, psNLSF_CB->order ); 100 silk_NLSF_stabilize( pNLSF_Q15, psNLSF_CB->deltaMin_Q15, psNLSF_CB->order );
101 } 101 }
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