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author | William Wilgus <me.theuser@yahoo.com> | 2019-01-04 02:01:18 -0600 |
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committer | Solomon Peachy <pizza@shaftnet.org> | 2021-04-23 14:23:04 +0000 |
commit | 14c6bb798d6bebc80f07e863236adbaf8d156a9c (patch) | |
tree | 551a4b641906c2626af844fa3239c1b2b1ff0ad3 /lib/rbcodec/codecs/libopus/silk/float/process_gains_FLP.c | |
parent | 75d93937965ec4df70d37df6d4feea04577c996b (diff) | |
download | rockbox-14c6bb798d6bebc80f07e863236adbaf8d156a9c.tar.gz rockbox-14c6bb798d6bebc80f07e863236adbaf8d156a9c.zip |
Sync opus codec to upstream git
Change-Id: I0cfcc0005c4ad7bfbb1aaf454188ce70fb043dc1
Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/float/process_gains_FLP.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/float/process_gains_FLP.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/float/process_gains_FLP.c b/lib/rbcodec/codecs/libopus/silk/float/process_gains_FLP.c new file mode 100644 index 0000000000..c0da0dae44 --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/float/process_gains_FLP.c | |||
@@ -0,0 +1,103 @@ | |||
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 | /* Processing of gains */ | ||
36 | void silk_process_gains_FLP( | ||
37 | silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */ | ||
38 | silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */ | ||
39 | opus_int condCoding /* I The type of conditional coding to use */ | ||
40 | ) | ||
41 | { | ||
42 | silk_shape_state_FLP *psShapeSt = &psEnc->sShape; | ||
43 | opus_int k; | ||
44 | opus_int32 pGains_Q16[ MAX_NB_SUBFR ]; | ||
45 | silk_float s, InvMaxSqrVal, gain, quant_offset; | ||
46 | |||
47 | /* Gain reduction when LTP coding gain is high */ | ||
48 | if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { | ||
49 | s = 1.0f - 0.5f * silk_sigmoid( 0.25f * ( psEncCtrl->LTPredCodGain - 12.0f ) ); | ||
50 | for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { | ||
51 | psEncCtrl->Gains[ k ] *= s; | ||
52 | } | ||
53 | } | ||
54 | |||
55 | /* Limit the quantized signal */ | ||
56 | InvMaxSqrVal = ( silk_float )( pow( 2.0f, 0.33f * ( 21.0f - psEnc->sCmn.SNR_dB_Q7 * ( 1 / 128.0f ) ) ) / psEnc->sCmn.subfr_length ); | ||
57 | |||
58 | for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { | ||
59 | /* Soft limit on ratio residual energy and squared gains */ | ||
60 | gain = psEncCtrl->Gains[ k ]; | ||
61 | gain = ( silk_float )sqrt( gain * gain + psEncCtrl->ResNrg[ k ] * InvMaxSqrVal ); | ||
62 | psEncCtrl->Gains[ k ] = silk_min_float( gain, 32767.0f ); | ||
63 | } | ||
64 | |||
65 | /* Prepare gains for noise shaping quantization */ | ||
66 | for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { | ||
67 | pGains_Q16[ k ] = (opus_int32)( psEncCtrl->Gains[ k ] * 65536.0f ); | ||
68 | } | ||
69 | |||
70 | /* Save unquantized gains and gain Index */ | ||
71 | silk_memcpy( psEncCtrl->GainsUnq_Q16, pGains_Q16, psEnc->sCmn.nb_subfr * sizeof( opus_int32 ) ); | ||
72 | psEncCtrl->lastGainIndexPrev = psShapeSt->LastGainIndex; | ||
73 | |||
74 | /* Quantize gains */ | ||
75 | silk_gains_quant( psEnc->sCmn.indices.GainsIndices, pGains_Q16, | ||
76 | &psShapeSt->LastGainIndex, condCoding == CODE_CONDITIONALLY, psEnc->sCmn.nb_subfr ); | ||
77 | |||
78 | /* Overwrite unquantized gains with quantized gains and convert back to Q0 from Q16 */ | ||
79 | for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { | ||
80 | psEncCtrl->Gains[ k ] = pGains_Q16[ k ] / 65536.0f; | ||
81 | } | ||
82 | |||
83 | /* Set quantizer offset for voiced signals. Larger offset when LTP coding gain is low or tilt is high (ie low-pass) */ | ||
84 | if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { | ||
85 | if( psEncCtrl->LTPredCodGain + psEnc->sCmn.input_tilt_Q15 * ( 1.0f / 32768.0f ) > 1.0f ) { | ||
86 | psEnc->sCmn.indices.quantOffsetType = 0; | ||
87 | } else { | ||
88 | psEnc->sCmn.indices.quantOffsetType = 1; | ||
89 | } | ||
90 | } | ||
91 | |||
92 | /* Quantizer boundary adjustment */ | ||
93 | quant_offset = silk_Quantization_Offsets_Q10[ psEnc->sCmn.indices.signalType >> 1 ][ psEnc->sCmn.indices.quantOffsetType ] / 1024.0f; | ||
94 | psEncCtrl->Lambda = LAMBDA_OFFSET | ||
95 | + LAMBDA_DELAYED_DECISIONS * psEnc->sCmn.nStatesDelayedDecision | ||
96 | + LAMBDA_SPEECH_ACT * psEnc->sCmn.speech_activity_Q8 * ( 1.0f / 256.0f ) | ||
97 | + LAMBDA_INPUT_QUALITY * psEncCtrl->input_quality | ||
98 | + LAMBDA_CODING_QUALITY * psEncCtrl->coding_quality | ||
99 | + LAMBDA_QUANT_OFFSET * quant_offset; | ||
100 | |||
101 | silk_assert( psEncCtrl->Lambda > 0.0f ); | ||
102 | silk_assert( psEncCtrl->Lambda < 2.0f ); | ||
103 | } | ||