diff options
Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/float/find_LTP_FLP.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/float/find_LTP_FLP.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/float/find_LTP_FLP.c b/lib/rbcodec/codecs/libopus/silk/float/find_LTP_FLP.c new file mode 100644 index 0000000000..f97064930e --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/float/find_LTP_FLP.c | |||
@@ -0,0 +1,64 @@ | |||
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 "main_FLP.h" | ||
33 | #include "tuning_parameters.h" | ||
34 | |||
35 | void silk_find_LTP_FLP( | ||
36 | silk_float XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */ | ||
37 | silk_float xX[ MAX_NB_SUBFR * LTP_ORDER ], /* O Weight for LTP quantization */ | ||
38 | const silk_float r_ptr[], /* I LPC residual */ | ||
39 | const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */ | ||
40 | const opus_int subfr_length, /* I Subframe length */ | ||
41 | const opus_int nb_subfr /* I number of subframes */ | ||
42 | ) | ||
43 | { | ||
44 | opus_int k; | ||
45 | silk_float *xX_ptr, *XX_ptr; | ||
46 | const silk_float *lag_ptr; | ||
47 | silk_float xx, temp; | ||
48 | |||
49 | xX_ptr = xX; | ||
50 | XX_ptr = XX; | ||
51 | for( k = 0; k < nb_subfr; k++ ) { | ||
52 | lag_ptr = r_ptr - ( lag[ k ] + LTP_ORDER / 2 ); | ||
53 | silk_corrMatrix_FLP( lag_ptr, subfr_length, LTP_ORDER, XX_ptr ); | ||
54 | silk_corrVector_FLP( lag_ptr, r_ptr, subfr_length, LTP_ORDER, xX_ptr ); | ||
55 | xx = ( silk_float )silk_energy_FLP( r_ptr, subfr_length + LTP_ORDER ); | ||
56 | temp = 1.0f / silk_max( xx, LTP_CORR_INV_MAX * 0.5f * ( XX_ptr[ 0 ] + XX_ptr[ 24 ] ) + 1.0f ); | ||
57 | silk_scale_vector_FLP( XX_ptr, temp, LTP_ORDER * LTP_ORDER ); | ||
58 | silk_scale_vector_FLP( xX_ptr, temp, LTP_ORDER ); | ||
59 | |||
60 | r_ptr += subfr_length; | ||
61 | XX_ptr += LTP_ORDER * LTP_ORDER; | ||
62 | xX_ptr += LTP_ORDER; | ||
63 | } | ||
64 | } | ||