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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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