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Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/float/LPC_analysis_filter_FLP.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/float/LPC_analysis_filter_FLP.c | 249 |
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diff --git a/lib/rbcodec/codecs/libopus/silk/float/LPC_analysis_filter_FLP.c b/lib/rbcodec/codecs/libopus/silk/float/LPC_analysis_filter_FLP.c new file mode 100644 index 0000000000..0e1a1fed0f --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/float/LPC_analysis_filter_FLP.c | |||
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1 | /*********************************************************************** | ||
2 | Copyright (c) 2006-2011, Skype Limited. All rights reserved. | ||
3 | Redistribution and use in source and binary forms, with or without | ||
4 | modification, are permitted provided that the following conditions | ||
5 | are met: | ||
6 | - Redistributions of source code must retain the above copyright notice, | ||
7 | this list of conditions and the following disclaimer. | ||
8 | - Redistributions in binary form must reproduce the above copyright | ||
9 | notice, this list of conditions and the following disclaimer in the | ||
10 | documentation and/or other materials provided with the distribution. | ||
11 | - Neither the name of Internet Society, IETF or IETF Trust, nor the | ||
12 | names of specific contributors, may be used to endorse or promote | ||
13 | products derived from this software without specific prior written | ||
14 | permission. | ||
15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | ||
16 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
17 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
18 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | ||
19 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
20 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
21 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
22 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
25 | POSSIBILITY OF SUCH DAMAGE. | ||
26 | ***********************************************************************/ | ||
27 | |||
28 | #ifdef HAVE_CONFIG_H | ||
29 | #include "config.h" | ||
30 | #endif | ||
31 | |||
32 | #include <stdlib.h> | ||
33 | #include "main_FLP.h" | ||
34 | |||
35 | /************************************************/ | ||
36 | /* LPC analysis filter */ | ||
37 | /* NB! State is kept internally and the */ | ||
38 | /* filter always starts with zero state */ | ||
39 | /* first Order output samples are set to zero */ | ||
40 | /************************************************/ | ||
41 | |||
42 | /* 16th order LPC analysis filter, does not write first 16 samples */ | ||
43 | static OPUS_INLINE void silk_LPC_analysis_filter16_FLP( | ||
44 | silk_float r_LPC[], /* O LPC residual signal */ | ||
45 | const silk_float PredCoef[], /* I LPC coefficients */ | ||
46 | const silk_float s[], /* I Input signal */ | ||
47 | const opus_int length /* I Length of input signal */ | ||
48 | ) | ||
49 | { | ||
50 | opus_int ix; | ||
51 | silk_float LPC_pred; | ||
52 | const silk_float *s_ptr; | ||
53 | |||
54 | for( ix = 16; ix < length; ix++ ) { | ||
55 | s_ptr = &s[ix - 1]; | ||
56 | |||
57 | /* short-term prediction */ | ||
58 | LPC_pred = s_ptr[ 0 ] * PredCoef[ 0 ] + | ||
59 | s_ptr[ -1 ] * PredCoef[ 1 ] + | ||
60 | s_ptr[ -2 ] * PredCoef[ 2 ] + | ||
61 | s_ptr[ -3 ] * PredCoef[ 3 ] + | ||
62 | s_ptr[ -4 ] * PredCoef[ 4 ] + | ||
63 | s_ptr[ -5 ] * PredCoef[ 5 ] + | ||
64 | s_ptr[ -6 ] * PredCoef[ 6 ] + | ||
65 | s_ptr[ -7 ] * PredCoef[ 7 ] + | ||
66 | s_ptr[ -8 ] * PredCoef[ 8 ] + | ||
67 | s_ptr[ -9 ] * PredCoef[ 9 ] + | ||
68 | s_ptr[ -10 ] * PredCoef[ 10 ] + | ||
69 | s_ptr[ -11 ] * PredCoef[ 11 ] + | ||
70 | s_ptr[ -12 ] * PredCoef[ 12 ] + | ||
71 | s_ptr[ -13 ] * PredCoef[ 13 ] + | ||
72 | s_ptr[ -14 ] * PredCoef[ 14 ] + | ||
73 | s_ptr[ -15 ] * PredCoef[ 15 ]; | ||
74 | |||
75 | /* prediction error */ | ||
76 | r_LPC[ix] = s_ptr[ 1 ] - LPC_pred; | ||
77 | } | ||
78 | } | ||
79 | |||
80 | /* 12th order LPC analysis filter, does not write first 12 samples */ | ||
81 | static OPUS_INLINE void silk_LPC_analysis_filter12_FLP( | ||
82 | silk_float r_LPC[], /* O LPC residual signal */ | ||
83 | const silk_float PredCoef[], /* I LPC coefficients */ | ||
84 | const silk_float s[], /* I Input signal */ | ||
85 | const opus_int length /* I Length of input signal */ | ||
86 | ) | ||
87 | { | ||
88 | opus_int ix; | ||
89 | silk_float LPC_pred; | ||
90 | const silk_float *s_ptr; | ||
91 | |||
92 | for( ix = 12; ix < length; ix++ ) { | ||
93 | s_ptr = &s[ix - 1]; | ||
94 | |||
95 | /* short-term prediction */ | ||
96 | LPC_pred = s_ptr[ 0 ] * PredCoef[ 0 ] + | ||
97 | s_ptr[ -1 ] * PredCoef[ 1 ] + | ||
98 | s_ptr[ -2 ] * PredCoef[ 2 ] + | ||
99 | s_ptr[ -3 ] * PredCoef[ 3 ] + | ||
100 | s_ptr[ -4 ] * PredCoef[ 4 ] + | ||
101 | s_ptr[ -5 ] * PredCoef[ 5 ] + | ||
102 | s_ptr[ -6 ] * PredCoef[ 6 ] + | ||
103 | s_ptr[ -7 ] * PredCoef[ 7 ] + | ||
104 | s_ptr[ -8 ] * PredCoef[ 8 ] + | ||
105 | s_ptr[ -9 ] * PredCoef[ 9 ] + | ||
106 | s_ptr[ -10 ] * PredCoef[ 10 ] + | ||
107 | s_ptr[ -11 ] * PredCoef[ 11 ]; | ||
108 | |||
109 | /* prediction error */ | ||
110 | r_LPC[ix] = s_ptr[ 1 ] - LPC_pred; | ||
111 | } | ||
112 | } | ||
113 | |||
114 | /* 10th order LPC analysis filter, does not write first 10 samples */ | ||
115 | static OPUS_INLINE void silk_LPC_analysis_filter10_FLP( | ||
116 | silk_float r_LPC[], /* O LPC residual signal */ | ||
117 | const silk_float PredCoef[], /* I LPC coefficients */ | ||
118 | const silk_float s[], /* I Input signal */ | ||
119 | const opus_int length /* I Length of input signal */ | ||
120 | ) | ||
121 | { | ||
122 | opus_int ix; | ||
123 | silk_float LPC_pred; | ||
124 | const silk_float *s_ptr; | ||
125 | |||
126 | for( ix = 10; ix < length; ix++ ) { | ||
127 | s_ptr = &s[ix - 1]; | ||
128 | |||
129 | /* short-term prediction */ | ||
130 | LPC_pred = s_ptr[ 0 ] * PredCoef[ 0 ] + | ||
131 | s_ptr[ -1 ] * PredCoef[ 1 ] + | ||
132 | s_ptr[ -2 ] * PredCoef[ 2 ] + | ||
133 | s_ptr[ -3 ] * PredCoef[ 3 ] + | ||
134 | s_ptr[ -4 ] * PredCoef[ 4 ] + | ||
135 | s_ptr[ -5 ] * PredCoef[ 5 ] + | ||
136 | s_ptr[ -6 ] * PredCoef[ 6 ] + | ||
137 | s_ptr[ -7 ] * PredCoef[ 7 ] + | ||
138 | s_ptr[ -8 ] * PredCoef[ 8 ] + | ||
139 | s_ptr[ -9 ] * PredCoef[ 9 ]; | ||
140 | |||
141 | /* prediction error */ | ||
142 | r_LPC[ix] = s_ptr[ 1 ] - LPC_pred; | ||
143 | } | ||
144 | } | ||
145 | |||
146 | /* 8th order LPC analysis filter, does not write first 8 samples */ | ||
147 | static OPUS_INLINE void silk_LPC_analysis_filter8_FLP( | ||
148 | silk_float r_LPC[], /* O LPC residual signal */ | ||
149 | const silk_float PredCoef[], /* I LPC coefficients */ | ||
150 | const silk_float s[], /* I Input signal */ | ||
151 | const opus_int length /* I Length of input signal */ | ||
152 | ) | ||
153 | { | ||
154 | opus_int ix; | ||
155 | silk_float LPC_pred; | ||
156 | const silk_float *s_ptr; | ||
157 | |||
158 | for( ix = 8; ix < length; ix++ ) { | ||
159 | s_ptr = &s[ix - 1]; | ||
160 | |||
161 | /* short-term prediction */ | ||
162 | LPC_pred = s_ptr[ 0 ] * PredCoef[ 0 ] + | ||
163 | s_ptr[ -1 ] * PredCoef[ 1 ] + | ||
164 | s_ptr[ -2 ] * PredCoef[ 2 ] + | ||
165 | s_ptr[ -3 ] * PredCoef[ 3 ] + | ||
166 | s_ptr[ -4 ] * PredCoef[ 4 ] + | ||
167 | s_ptr[ -5 ] * PredCoef[ 5 ] + | ||
168 | s_ptr[ -6 ] * PredCoef[ 6 ] + | ||
169 | s_ptr[ -7 ] * PredCoef[ 7 ]; | ||
170 | |||
171 | /* prediction error */ | ||
172 | r_LPC[ix] = s_ptr[ 1 ] - LPC_pred; | ||
173 | } | ||
174 | } | ||
175 | |||
176 | /* 6th order LPC analysis filter, does not write first 6 samples */ | ||
177 | static OPUS_INLINE void silk_LPC_analysis_filter6_FLP( | ||
178 | silk_float r_LPC[], /* O LPC residual signal */ | ||
179 | const silk_float PredCoef[], /* I LPC coefficients */ | ||
180 | const silk_float s[], /* I Input signal */ | ||
181 | const opus_int length /* I Length of input signal */ | ||
182 | ) | ||
183 | { | ||
184 | opus_int ix; | ||
185 | silk_float LPC_pred; | ||
186 | const silk_float *s_ptr; | ||
187 | |||
188 | for( ix = 6; ix < length; ix++ ) { | ||
189 | s_ptr = &s[ix - 1]; | ||
190 | |||
191 | /* short-term prediction */ | ||
192 | LPC_pred = s_ptr[ 0 ] * PredCoef[ 0 ] + | ||
193 | s_ptr[ -1 ] * PredCoef[ 1 ] + | ||
194 | s_ptr[ -2 ] * PredCoef[ 2 ] + | ||
195 | s_ptr[ -3 ] * PredCoef[ 3 ] + | ||
196 | s_ptr[ -4 ] * PredCoef[ 4 ] + | ||
197 | s_ptr[ -5 ] * PredCoef[ 5 ]; | ||
198 | |||
199 | /* prediction error */ | ||
200 | r_LPC[ix] = s_ptr[ 1 ] - LPC_pred; | ||
201 | } | ||
202 | } | ||
203 | |||
204 | /************************************************/ | ||
205 | /* LPC analysis filter */ | ||
206 | /* NB! State is kept internally and the */ | ||
207 | /* filter always starts with zero state */ | ||
208 | /* first Order output samples are set to zero */ | ||
209 | /************************************************/ | ||
210 | void silk_LPC_analysis_filter_FLP( | ||
211 | silk_float r_LPC[], /* O LPC residual signal */ | ||
212 | const silk_float PredCoef[], /* I LPC coefficients */ | ||
213 | const silk_float s[], /* I Input signal */ | ||
214 | const opus_int length, /* I Length of input signal */ | ||
215 | const opus_int Order /* I LPC order */ | ||
216 | ) | ||
217 | { | ||
218 | celt_assert( Order <= length ); | ||
219 | |||
220 | switch( Order ) { | ||
221 | case 6: | ||
222 | silk_LPC_analysis_filter6_FLP( r_LPC, PredCoef, s, length ); | ||
223 | break; | ||
224 | |||
225 | case 8: | ||
226 | silk_LPC_analysis_filter8_FLP( r_LPC, PredCoef, s, length ); | ||
227 | break; | ||
228 | |||
229 | case 10: | ||
230 | silk_LPC_analysis_filter10_FLP( r_LPC, PredCoef, s, length ); | ||
231 | break; | ||
232 | |||
233 | case 12: | ||
234 | silk_LPC_analysis_filter12_FLP( r_LPC, PredCoef, s, length ); | ||
235 | break; | ||
236 | |||
237 | case 16: | ||
238 | silk_LPC_analysis_filter16_FLP( r_LPC, PredCoef, s, length ); | ||
239 | break; | ||
240 | |||
241 | default: | ||
242 | celt_assert( 0 ); | ||
243 | break; | ||
244 | } | ||
245 | |||
246 | /* Set first Order output samples to zero */ | ||
247 | silk_memset( r_LPC, 0, Order * sizeof( silk_float ) ); | ||
248 | } | ||
249 | |||