diff options
Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/fixed/find_pitch_lags_FIX.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/fixed/find_pitch_lags_FIX.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/fixed/find_pitch_lags_FIX.c b/lib/rbcodec/codecs/libopus/silk/fixed/find_pitch_lags_FIX.c new file mode 100644 index 0000000000..6c3379f2bb --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/fixed/find_pitch_lags_FIX.c | |||
@@ -0,0 +1,143 @@ | |||
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 | #include "tuning_parameters.h" | ||
35 | |||
36 | /* Find pitch lags */ | ||
37 | void silk_find_pitch_lags_FIX( | ||
38 | silk_encoder_state_FIX *psEnc, /* I/O encoder state */ | ||
39 | silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */ | ||
40 | opus_int16 res[], /* O residual */ | ||
41 | const opus_int16 x[], /* I Speech signal */ | ||
42 | int arch /* I Run-time architecture */ | ||
43 | ) | ||
44 | { | ||
45 | opus_int buf_len, i, scale; | ||
46 | opus_int32 thrhld_Q13, res_nrg; | ||
47 | const opus_int16 *x_ptr; | ||
48 | VARDECL( opus_int16, Wsig ); | ||
49 | opus_int16 *Wsig_ptr; | ||
50 | opus_int32 auto_corr[ MAX_FIND_PITCH_LPC_ORDER + 1 ]; | ||
51 | opus_int16 rc_Q15[ MAX_FIND_PITCH_LPC_ORDER ]; | ||
52 | opus_int32 A_Q24[ MAX_FIND_PITCH_LPC_ORDER ]; | ||
53 | opus_int16 A_Q12[ MAX_FIND_PITCH_LPC_ORDER ]; | ||
54 | SAVE_STACK; | ||
55 | |||
56 | /******************************************/ | ||
57 | /* Set up buffer lengths etc based on Fs */ | ||
58 | /******************************************/ | ||
59 | buf_len = psEnc->sCmn.la_pitch + psEnc->sCmn.frame_length + psEnc->sCmn.ltp_mem_length; | ||
60 | |||
61 | /* Safety check */ | ||
62 | celt_assert( buf_len >= psEnc->sCmn.pitch_LPC_win_length ); | ||
63 | |||
64 | /*************************************/ | ||
65 | /* Estimate LPC AR coefficients */ | ||
66 | /*************************************/ | ||
67 | |||
68 | /* Calculate windowed signal */ | ||
69 | |||
70 | ALLOC( Wsig, psEnc->sCmn.pitch_LPC_win_length, opus_int16 ); | ||
71 | |||
72 | /* First LA_LTP samples */ | ||
73 | x_ptr = x + buf_len - psEnc->sCmn.pitch_LPC_win_length; | ||
74 | Wsig_ptr = Wsig; | ||
75 | silk_apply_sine_window( Wsig_ptr, x_ptr, 1, psEnc->sCmn.la_pitch ); | ||
76 | |||
77 | /* Middle un - windowed samples */ | ||
78 | Wsig_ptr += psEnc->sCmn.la_pitch; | ||
79 | x_ptr += psEnc->sCmn.la_pitch; | ||
80 | silk_memcpy( Wsig_ptr, x_ptr, ( psEnc->sCmn.pitch_LPC_win_length - silk_LSHIFT( psEnc->sCmn.la_pitch, 1 ) ) * sizeof( opus_int16 ) ); | ||
81 | |||
82 | /* Last LA_LTP samples */ | ||
83 | Wsig_ptr += psEnc->sCmn.pitch_LPC_win_length - silk_LSHIFT( psEnc->sCmn.la_pitch, 1 ); | ||
84 | x_ptr += psEnc->sCmn.pitch_LPC_win_length - silk_LSHIFT( psEnc->sCmn.la_pitch, 1 ); | ||
85 | silk_apply_sine_window( Wsig_ptr, x_ptr, 2, psEnc->sCmn.la_pitch ); | ||
86 | |||
87 | /* Calculate autocorrelation sequence */ | ||
88 | silk_autocorr( auto_corr, &scale, Wsig, psEnc->sCmn.pitch_LPC_win_length, psEnc->sCmn.pitchEstimationLPCOrder + 1, arch ); | ||
89 | |||
90 | /* Add white noise, as fraction of energy */ | ||
91 | auto_corr[ 0 ] = silk_SMLAWB( auto_corr[ 0 ], auto_corr[ 0 ], SILK_FIX_CONST( FIND_PITCH_WHITE_NOISE_FRACTION, 16 ) ) + 1; | ||
92 | |||
93 | /* Calculate the reflection coefficients using schur */ | ||
94 | res_nrg = silk_schur( rc_Q15, auto_corr, psEnc->sCmn.pitchEstimationLPCOrder ); | ||
95 | |||
96 | /* Prediction gain */ | ||
97 | psEncCtrl->predGain_Q16 = silk_DIV32_varQ( auto_corr[ 0 ], silk_max_int( res_nrg, 1 ), 16 ); | ||
98 | |||
99 | /* Convert reflection coefficients to prediction coefficients */ | ||
100 | silk_k2a( A_Q24, rc_Q15, psEnc->sCmn.pitchEstimationLPCOrder ); | ||
101 | |||
102 | /* Convert From 32 bit Q24 to 16 bit Q12 coefs */ | ||
103 | for( i = 0; i < psEnc->sCmn.pitchEstimationLPCOrder; i++ ) { | ||
104 | A_Q12[ i ] = (opus_int16)silk_SAT16( silk_RSHIFT( A_Q24[ i ], 12 ) ); | ||
105 | } | ||
106 | |||
107 | /* Do BWE */ | ||
108 | silk_bwexpander( A_Q12, psEnc->sCmn.pitchEstimationLPCOrder, SILK_FIX_CONST( FIND_PITCH_BANDWIDTH_EXPANSION, 16 ) ); | ||
109 | |||
110 | /*****************************************/ | ||
111 | /* LPC analysis filtering */ | ||
112 | /*****************************************/ | ||
113 | silk_LPC_analysis_filter( res, x, A_Q12, buf_len, psEnc->sCmn.pitchEstimationLPCOrder, psEnc->sCmn.arch ); | ||
114 | |||
115 | if( psEnc->sCmn.indices.signalType != TYPE_NO_VOICE_ACTIVITY && psEnc->sCmn.first_frame_after_reset == 0 ) { | ||
116 | /* Threshold for pitch estimator */ | ||
117 | thrhld_Q13 = SILK_FIX_CONST( 0.6, 13 ); | ||
118 | thrhld_Q13 = silk_SMLABB( thrhld_Q13, SILK_FIX_CONST( -0.004, 13 ), psEnc->sCmn.pitchEstimationLPCOrder ); | ||
119 | thrhld_Q13 = silk_SMLAWB( thrhld_Q13, SILK_FIX_CONST( -0.1, 21 ), psEnc->sCmn.speech_activity_Q8 ); | ||
120 | thrhld_Q13 = silk_SMLABB( thrhld_Q13, SILK_FIX_CONST( -0.15, 13 ), silk_RSHIFT( psEnc->sCmn.prevSignalType, 1 ) ); | ||
121 | thrhld_Q13 = silk_SMLAWB( thrhld_Q13, SILK_FIX_CONST( -0.1, 14 ), psEnc->sCmn.input_tilt_Q15 ); | ||
122 | thrhld_Q13 = silk_SAT16( thrhld_Q13 ); | ||
123 | |||
124 | /*****************************************/ | ||
125 | /* Call pitch estimator */ | ||
126 | /*****************************************/ | ||
127 | if( silk_pitch_analysis_core( res, psEncCtrl->pitchL, &psEnc->sCmn.indices.lagIndex, &psEnc->sCmn.indices.contourIndex, | ||
128 | &psEnc->LTPCorr_Q15, psEnc->sCmn.prevLag, psEnc->sCmn.pitchEstimationThreshold_Q16, | ||
129 | (opus_int)thrhld_Q13, psEnc->sCmn.fs_kHz, psEnc->sCmn.pitchEstimationComplexity, psEnc->sCmn.nb_subfr, | ||
130 | psEnc->sCmn.arch) == 0 ) | ||
131 | { | ||
132 | psEnc->sCmn.indices.signalType = TYPE_VOICED; | ||
133 | } else { | ||
134 | psEnc->sCmn.indices.signalType = TYPE_UNVOICED; | ||
135 | } | ||
136 | } else { | ||
137 | silk_memset( psEncCtrl->pitchL, 0, sizeof( psEncCtrl->pitchL ) ); | ||
138 | psEnc->sCmn.indices.lagIndex = 0; | ||
139 | psEnc->sCmn.indices.contourIndex = 0; | ||
140 | psEnc->LTPCorr_Q15 = 0; | ||
141 | } | ||
142 | RESTORE_STACK; | ||
143 | } | ||