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Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/fixed/process_gains_FIX.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/fixed/process_gains_FIX.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/fixed/process_gains_FIX.c b/lib/rbcodec/codecs/libopus/silk/fixed/process_gains_FIX.c new file mode 100644 index 0000000000..05aba31788 --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/fixed/process_gains_FIX.c | |||
@@ -0,0 +1,117 @@ | |||
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 "tuning_parameters.h" | ||
34 | |||
35 | /* Processing of gains */ | ||
36 | void silk_process_gains_FIX( | ||
37 | silk_encoder_state_FIX *psEnc, /* I/O Encoder state */ | ||
38 | silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control */ | ||
39 | opus_int condCoding /* I The type of conditional coding to use */ | ||
40 | ) | ||
41 | { | ||
42 | silk_shape_state_FIX *psShapeSt = &psEnc->sShape; | ||
43 | opus_int k; | ||
44 | opus_int32 s_Q16, InvMaxSqrVal_Q16, gain, gain_squared, ResNrg, ResNrgPart, quant_offset_Q10; | ||
45 | |||
46 | /* Gain reduction when LTP coding gain is high */ | ||
47 | if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { | ||
48 | /*s = -0.5f * silk_sigmoid( 0.25f * ( psEncCtrl->LTPredCodGain - 12.0f ) ); */ | ||
49 | s_Q16 = -silk_sigm_Q15( silk_RSHIFT_ROUND( psEncCtrl->LTPredCodGain_Q7 - SILK_FIX_CONST( 12.0, 7 ), 4 ) ); | ||
50 | for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { | ||
51 | psEncCtrl->Gains_Q16[ k ] = silk_SMLAWB( psEncCtrl->Gains_Q16[ k ], psEncCtrl->Gains_Q16[ k ], s_Q16 ); | ||
52 | } | ||
53 | } | ||
54 | |||
55 | /* Limit the quantized signal */ | ||
56 | /* InvMaxSqrVal = pow( 2.0f, 0.33f * ( 21.0f - SNR_dB ) ) / subfr_length; */ | ||
57 | InvMaxSqrVal_Q16 = silk_DIV32_16( silk_log2lin( | ||
58 | silk_SMULWB( SILK_FIX_CONST( 21 + 16 / 0.33, 7 ) - psEnc->sCmn.SNR_dB_Q7, SILK_FIX_CONST( 0.33, 16 ) ) ), psEnc->sCmn.subfr_length ); | ||
59 | |||
60 | for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { | ||
61 | /* Soft limit on ratio residual energy and squared gains */ | ||
62 | ResNrg = psEncCtrl->ResNrg[ k ]; | ||
63 | ResNrgPart = silk_SMULWW( ResNrg, InvMaxSqrVal_Q16 ); | ||
64 | if( psEncCtrl->ResNrgQ[ k ] > 0 ) { | ||
65 | ResNrgPart = silk_RSHIFT_ROUND( ResNrgPart, psEncCtrl->ResNrgQ[ k ] ); | ||
66 | } else { | ||
67 | if( ResNrgPart >= silk_RSHIFT( silk_int32_MAX, -psEncCtrl->ResNrgQ[ k ] ) ) { | ||
68 | ResNrgPart = silk_int32_MAX; | ||
69 | } else { | ||
70 | ResNrgPart = silk_LSHIFT( ResNrgPart, -psEncCtrl->ResNrgQ[ k ] ); | ||
71 | } | ||
72 | } | ||
73 | gain = psEncCtrl->Gains_Q16[ k ]; | ||
74 | gain_squared = silk_ADD_SAT32( ResNrgPart, silk_SMMUL( gain, gain ) ); | ||
75 | if( gain_squared < silk_int16_MAX ) { | ||
76 | /* recalculate with higher precision */ | ||
77 | gain_squared = silk_SMLAWW( silk_LSHIFT( ResNrgPart, 16 ), gain, gain ); | ||
78 | silk_assert( gain_squared > 0 ); | ||
79 | gain = silk_SQRT_APPROX( gain_squared ); /* Q8 */ | ||
80 | gain = silk_min( gain, silk_int32_MAX >> 8 ); | ||
81 | psEncCtrl->Gains_Q16[ k ] = silk_LSHIFT_SAT32( gain, 8 ); /* Q16 */ | ||
82 | } else { | ||
83 | gain = silk_SQRT_APPROX( gain_squared ); /* Q0 */ | ||
84 | gain = silk_min( gain, silk_int32_MAX >> 16 ); | ||
85 | psEncCtrl->Gains_Q16[ k ] = silk_LSHIFT_SAT32( gain, 16 ); /* Q16 */ | ||
86 | } | ||
87 | } | ||
88 | |||
89 | /* Save unquantized gains and gain Index */ | ||
90 | silk_memcpy( psEncCtrl->GainsUnq_Q16, psEncCtrl->Gains_Q16, psEnc->sCmn.nb_subfr * sizeof( opus_int32 ) ); | ||
91 | psEncCtrl->lastGainIndexPrev = psShapeSt->LastGainIndex; | ||
92 | |||
93 | /* Quantize gains */ | ||
94 | silk_gains_quant( psEnc->sCmn.indices.GainsIndices, psEncCtrl->Gains_Q16, | ||
95 | &psShapeSt->LastGainIndex, condCoding == CODE_CONDITIONALLY, psEnc->sCmn.nb_subfr ); | ||
96 | |||
97 | /* Set quantizer offset for voiced signals. Larger offset when LTP coding gain is low or tilt is high (ie low-pass) */ | ||
98 | if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { | ||
99 | if( psEncCtrl->LTPredCodGain_Q7 + silk_RSHIFT( psEnc->sCmn.input_tilt_Q15, 8 ) > SILK_FIX_CONST( 1.0, 7 ) ) { | ||
100 | psEnc->sCmn.indices.quantOffsetType = 0; | ||
101 | } else { | ||
102 | psEnc->sCmn.indices.quantOffsetType = 1; | ||
103 | } | ||
104 | } | ||
105 | |||
106 | /* Quantizer boundary adjustment */ | ||
107 | quant_offset_Q10 = silk_Quantization_Offsets_Q10[ psEnc->sCmn.indices.signalType >> 1 ][ psEnc->sCmn.indices.quantOffsetType ]; | ||
108 | psEncCtrl->Lambda_Q10 = SILK_FIX_CONST( LAMBDA_OFFSET, 10 ) | ||
109 | + silk_SMULBB( SILK_FIX_CONST( LAMBDA_DELAYED_DECISIONS, 10 ), psEnc->sCmn.nStatesDelayedDecision ) | ||
110 | + silk_SMULWB( SILK_FIX_CONST( LAMBDA_SPEECH_ACT, 18 ), psEnc->sCmn.speech_activity_Q8 ) | ||
111 | + silk_SMULWB( SILK_FIX_CONST( LAMBDA_INPUT_QUALITY, 12 ), psEncCtrl->input_quality_Q14 ) | ||
112 | + silk_SMULWB( SILK_FIX_CONST( LAMBDA_CODING_QUALITY, 12 ), psEncCtrl->coding_quality_Q14 ) | ||
113 | + silk_SMULWB( SILK_FIX_CONST( LAMBDA_QUANT_OFFSET, 16 ), quant_offset_Q10 ); | ||
114 | |||
115 | silk_assert( psEncCtrl->Lambda_Q10 > 0 ); | ||
116 | silk_assert( psEncCtrl->Lambda_Q10 < SILK_FIX_CONST( 2, 10 ) ); | ||
117 | } | ||