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Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/fixed/residual_energy_FIX.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/fixed/residual_energy_FIX.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/fixed/residual_energy_FIX.c b/lib/rbcodec/codecs/libopus/silk/fixed/residual_energy_FIX.c new file mode 100644 index 0000000000..6c7cade9a0 --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/fixed/residual_energy_FIX.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 "main_FIX.h" | ||
33 | #include "stack_alloc.h" | ||
34 | |||
35 | /* Calculates residual energies of input subframes where all subframes have LPC_order */ | ||
36 | /* of preceding samples */ | ||
37 | void silk_residual_energy_FIX( | ||
38 | opus_int32 nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */ | ||
39 | opus_int nrgsQ[ MAX_NB_SUBFR ], /* O Q value per subframe */ | ||
40 | const opus_int16 x[], /* I Input signal */ | ||
41 | opus_int16 a_Q12[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */ | ||
42 | const opus_int32 gains[ MAX_NB_SUBFR ], /* I Quantization gains */ | ||
43 | const opus_int subfr_length, /* I Subframe length */ | ||
44 | const opus_int nb_subfr, /* I Number of subframes */ | ||
45 | const opus_int LPC_order, /* I LPC order */ | ||
46 | int arch /* I Run-time architecture */ | ||
47 | ) | ||
48 | { | ||
49 | opus_int offset, i, j, rshift, lz1, lz2; | ||
50 | opus_int16 *LPC_res_ptr; | ||
51 | VARDECL( opus_int16, LPC_res ); | ||
52 | const opus_int16 *x_ptr; | ||
53 | opus_int32 tmp32; | ||
54 | SAVE_STACK; | ||
55 | |||
56 | x_ptr = x; | ||
57 | offset = LPC_order + subfr_length; | ||
58 | |||
59 | /* Filter input to create the LPC residual for each frame half, and measure subframe energies */ | ||
60 | ALLOC( LPC_res, ( MAX_NB_SUBFR >> 1 ) * offset, opus_int16 ); | ||
61 | celt_assert( ( nb_subfr >> 1 ) * ( MAX_NB_SUBFR >> 1 ) == nb_subfr ); | ||
62 | for( i = 0; i < nb_subfr >> 1; i++ ) { | ||
63 | /* Calculate half frame LPC residual signal including preceding samples */ | ||
64 | silk_LPC_analysis_filter( LPC_res, x_ptr, a_Q12[ i ], ( MAX_NB_SUBFR >> 1 ) * offset, LPC_order, arch ); | ||
65 | |||
66 | /* Point to first subframe of the just calculated LPC residual signal */ | ||
67 | LPC_res_ptr = LPC_res + LPC_order; | ||
68 | for( j = 0; j < ( MAX_NB_SUBFR >> 1 ); j++ ) { | ||
69 | /* Measure subframe energy */ | ||
70 | silk_sum_sqr_shift( &nrgs[ i * ( MAX_NB_SUBFR >> 1 ) + j ], &rshift, LPC_res_ptr, subfr_length ); | ||
71 | |||
72 | /* Set Q values for the measured energy */ | ||
73 | nrgsQ[ i * ( MAX_NB_SUBFR >> 1 ) + j ] = -rshift; | ||
74 | |||
75 | /* Move to next subframe */ | ||
76 | LPC_res_ptr += offset; | ||
77 | } | ||
78 | /* Move to next frame half */ | ||
79 | x_ptr += ( MAX_NB_SUBFR >> 1 ) * offset; | ||
80 | } | ||
81 | |||
82 | /* Apply the squared subframe gains */ | ||
83 | for( i = 0; i < nb_subfr; i++ ) { | ||
84 | /* Fully upscale gains and energies */ | ||
85 | lz1 = silk_CLZ32( nrgs[ i ] ) - 1; | ||
86 | lz2 = silk_CLZ32( gains[ i ] ) - 1; | ||
87 | |||
88 | tmp32 = silk_LSHIFT32( gains[ i ], lz2 ); | ||
89 | |||
90 | /* Find squared gains */ | ||
91 | tmp32 = silk_SMMUL( tmp32, tmp32 ); /* Q( 2 * lz2 - 32 )*/ | ||
92 | |||
93 | /* Scale energies */ | ||
94 | nrgs[ i ] = silk_SMMUL( tmp32, silk_LSHIFT32( nrgs[ i ], lz1 ) ); /* Q( nrgsQ[ i ] + lz1 + 2 * lz2 - 32 - 32 )*/ | ||
95 | nrgsQ[ i ] += lz1 + 2 * lz2 - 32 - 32; | ||
96 | } | ||
97 | RESTORE_STACK; | ||
98 | } | ||