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Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/NLSF_VQ.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/NLSF_VQ.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/NLSF_VQ.c b/lib/rbcodec/codecs/libopus/silk/NLSF_VQ.c new file mode 100644 index 0000000000..b83182a79c --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/NLSF_VQ.c | |||
@@ -0,0 +1,76 @@ | |||
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.h" | ||
33 | |||
34 | /* Compute quantization errors for an LPC_order element input vector for a VQ codebook */ | ||
35 | void silk_NLSF_VQ( | ||
36 | opus_int32 err_Q24[], /* O Quantization errors [K] */ | ||
37 | const opus_int16 in_Q15[], /* I Input vectors to be quantized [LPC_order] */ | ||
38 | const opus_uint8 pCB_Q8[], /* I Codebook vectors [K*LPC_order] */ | ||
39 | const opus_int16 pWght_Q9[], /* I Codebook weights [K*LPC_order] */ | ||
40 | const opus_int K, /* I Number of codebook vectors */ | ||
41 | const opus_int LPC_order /* I Number of LPCs */ | ||
42 | ) | ||
43 | { | ||
44 | opus_int i, m; | ||
45 | opus_int32 diff_Q15, diffw_Q24, sum_error_Q24, pred_Q24; | ||
46 | const opus_int16 *w_Q9_ptr; | ||
47 | const opus_uint8 *cb_Q8_ptr; | ||
48 | |||
49 | celt_assert( ( LPC_order & 1 ) == 0 ); | ||
50 | |||
51 | /* Loop over codebook */ | ||
52 | cb_Q8_ptr = pCB_Q8; | ||
53 | w_Q9_ptr = pWght_Q9; | ||
54 | for( i = 0; i < K; i++ ) { | ||
55 | sum_error_Q24 = 0; | ||
56 | pred_Q24 = 0; | ||
57 | for( m = LPC_order-2; m >= 0; m -= 2 ) { | ||
58 | /* Compute weighted absolute predictive quantization error for index m + 1 */ | ||
59 | diff_Q15 = silk_SUB_LSHIFT32( in_Q15[ m + 1 ], (opus_int32)cb_Q8_ptr[ m + 1 ], 7 ); /* range: [ -32767 : 32767 ]*/ | ||
60 | diffw_Q24 = silk_SMULBB( diff_Q15, w_Q9_ptr[ m + 1 ] ); | ||
61 | sum_error_Q24 = silk_ADD32( sum_error_Q24, silk_abs( silk_SUB_RSHIFT32( diffw_Q24, pred_Q24, 1 ) ) ); | ||
62 | pred_Q24 = diffw_Q24; | ||
63 | |||
64 | /* Compute weighted absolute predictive quantization error for index m */ | ||
65 | diff_Q15 = silk_SUB_LSHIFT32( in_Q15[ m ], (opus_int32)cb_Q8_ptr[ m ], 7 ); /* range: [ -32767 : 32767 ]*/ | ||
66 | diffw_Q24 = silk_SMULBB( diff_Q15, w_Q9_ptr[ m ] ); | ||
67 | sum_error_Q24 = silk_ADD32( sum_error_Q24, silk_abs( silk_SUB_RSHIFT32( diffw_Q24, pred_Q24, 1 ) ) ); | ||
68 | pred_Q24 = diffw_Q24; | ||
69 | |||
70 | silk_assert( sum_error_Q24 >= 0 ); | ||
71 | } | ||
72 | err_Q24[ i ] = sum_error_Q24; | ||
73 | cb_Q8_ptr += LPC_order; | ||
74 | w_Q9_ptr += LPC_order; | ||
75 | } | ||
76 | } | ||