Line data Source code
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 : /* Encode side-information parameters to payload */
35 0 : void silk_encode_indices(
36 : silk_encoder_state *psEncC, /* I/O Encoder state */
37 : ec_enc *psRangeEnc, /* I/O Compressor data structure */
38 : opus_int FrameIndex, /* I Frame number */
39 : opus_int encode_LBRR, /* I Flag indicating LBRR data is being encoded */
40 : opus_int condCoding /* I The type of conditional coding to use */
41 : )
42 : {
43 : opus_int i, k, typeOffset;
44 : opus_int encode_absolute_lagIndex, delta_lagIndex;
45 : opus_int16 ec_ix[ MAX_LPC_ORDER ];
46 : opus_uint8 pred_Q8[ MAX_LPC_ORDER ];
47 : const SideInfoIndices *psIndices;
48 :
49 0 : if( encode_LBRR ) {
50 0 : psIndices = &psEncC->indices_LBRR[ FrameIndex ];
51 : } else {
52 0 : psIndices = &psEncC->indices;
53 : }
54 :
55 : /*******************************************/
56 : /* Encode signal type and quantizer offset */
57 : /*******************************************/
58 0 : typeOffset = 2 * psIndices->signalType + psIndices->quantOffsetType;
59 0 : silk_assert( typeOffset >= 0 && typeOffset < 6 );
60 0 : silk_assert( encode_LBRR == 0 || typeOffset >= 2 );
61 0 : if( encode_LBRR || typeOffset >= 2 ) {
62 0 : ec_enc_icdf( psRangeEnc, typeOffset - 2, silk_type_offset_VAD_iCDF, 8 );
63 : } else {
64 0 : ec_enc_icdf( psRangeEnc, typeOffset, silk_type_offset_no_VAD_iCDF, 8 );
65 : }
66 :
67 : /****************/
68 : /* Encode gains */
69 : /****************/
70 : /* first subframe */
71 0 : if( condCoding == CODE_CONDITIONALLY ) {
72 : /* conditional coding */
73 0 : silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 );
74 0 : ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ], silk_delta_gain_iCDF, 8 );
75 : } else {
76 : /* independent coding, in two stages: MSB bits followed by 3 LSBs */
77 0 : silk_assert( psIndices->GainsIndices[ 0 ] >= 0 && psIndices->GainsIndices[ 0 ] < N_LEVELS_QGAIN );
78 0 : ec_enc_icdf( psRangeEnc, silk_RSHIFT( psIndices->GainsIndices[ 0 ], 3 ), silk_gain_iCDF[ psIndices->signalType ], 8 );
79 0 : ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ 0 ] & 7, silk_uniform8_iCDF, 8 );
80 : }
81 :
82 : /* remaining subframes */
83 0 : for( i = 1; i < psEncC->nb_subfr; i++ ) {
84 0 : silk_assert( psIndices->GainsIndices[ i ] >= 0 && psIndices->GainsIndices[ i ] < MAX_DELTA_GAIN_QUANT - MIN_DELTA_GAIN_QUANT + 1 );
85 0 : ec_enc_icdf( psRangeEnc, psIndices->GainsIndices[ i ], silk_delta_gain_iCDF, 8 );
86 : }
87 :
88 : /****************/
89 : /* Encode NLSFs */
90 : /****************/
91 0 : ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ 0 ], &psEncC->psNLSF_CB->CB1_iCDF[ ( psIndices->signalType >> 1 ) * psEncC->psNLSF_CB->nVectors ], 8 );
92 0 : silk_NLSF_unpack( ec_ix, pred_Q8, psEncC->psNLSF_CB, psIndices->NLSFIndices[ 0 ] );
93 0 : silk_assert( psEncC->psNLSF_CB->order == psEncC->predictLPCOrder );
94 0 : for( i = 0; i < psEncC->psNLSF_CB->order; i++ ) {
95 0 : if( psIndices->NLSFIndices[ i+1 ] >= NLSF_QUANT_MAX_AMPLITUDE ) {
96 0 : ec_enc_icdf( psRangeEnc, 2 * NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
97 0 : ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 );
98 0 : } else if( psIndices->NLSFIndices[ i+1 ] <= -NLSF_QUANT_MAX_AMPLITUDE ) {
99 0 : ec_enc_icdf( psRangeEnc, 0, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
100 0 : ec_enc_icdf( psRangeEnc, -psIndices->NLSFIndices[ i+1 ] - NLSF_QUANT_MAX_AMPLITUDE, silk_NLSF_EXT_iCDF, 8 );
101 : } else {
102 0 : ec_enc_icdf( psRangeEnc, psIndices->NLSFIndices[ i+1 ] + NLSF_QUANT_MAX_AMPLITUDE, &psEncC->psNLSF_CB->ec_iCDF[ ec_ix[ i ] ], 8 );
103 : }
104 : }
105 :
106 : /* Encode NLSF interpolation factor */
107 0 : if( psEncC->nb_subfr == MAX_NB_SUBFR ) {
108 0 : silk_assert( psIndices->NLSFInterpCoef_Q2 >= 0 && psIndices->NLSFInterpCoef_Q2 < 5 );
109 0 : ec_enc_icdf( psRangeEnc, psIndices->NLSFInterpCoef_Q2, silk_NLSF_interpolation_factor_iCDF, 8 );
110 : }
111 :
112 0 : if( psIndices->signalType == TYPE_VOICED )
113 : {
114 : /*********************/
115 : /* Encode pitch lags */
116 : /*********************/
117 : /* lag index */
118 0 : encode_absolute_lagIndex = 1;
119 0 : if( condCoding == CODE_CONDITIONALLY && psEncC->ec_prevSignalType == TYPE_VOICED ) {
120 : /* Delta Encoding */
121 0 : delta_lagIndex = psIndices->lagIndex - psEncC->ec_prevLagIndex;
122 0 : if( delta_lagIndex < -8 || delta_lagIndex > 11 ) {
123 0 : delta_lagIndex = 0;
124 : } else {
125 0 : delta_lagIndex = delta_lagIndex + 9;
126 0 : encode_absolute_lagIndex = 0; /* Only use delta */
127 : }
128 0 : silk_assert( delta_lagIndex >= 0 && delta_lagIndex < 21 );
129 0 : ec_enc_icdf( psRangeEnc, delta_lagIndex, silk_pitch_delta_iCDF, 8 );
130 : }
131 0 : if( encode_absolute_lagIndex ) {
132 : /* Absolute encoding */
133 : opus_int32 pitch_high_bits, pitch_low_bits;
134 0 : pitch_high_bits = silk_DIV32_16( psIndices->lagIndex, silk_RSHIFT( psEncC->fs_kHz, 1 ) );
135 0 : pitch_low_bits = psIndices->lagIndex - silk_SMULBB( pitch_high_bits, silk_RSHIFT( psEncC->fs_kHz, 1 ) );
136 0 : silk_assert( pitch_low_bits < psEncC->fs_kHz / 2 );
137 0 : silk_assert( pitch_high_bits < 32 );
138 0 : ec_enc_icdf( psRangeEnc, pitch_high_bits, silk_pitch_lag_iCDF, 8 );
139 0 : ec_enc_icdf( psRangeEnc, pitch_low_bits, psEncC->pitch_lag_low_bits_iCDF, 8 );
140 : }
141 0 : psEncC->ec_prevLagIndex = psIndices->lagIndex;
142 :
143 : /* Countour index */
144 0 : silk_assert( psIndices->contourIndex >= 0 );
145 0 : silk_assert( ( psIndices->contourIndex < 34 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 4 ) ||
146 : ( psIndices->contourIndex < 11 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 4 ) ||
147 : ( psIndices->contourIndex < 12 && psEncC->fs_kHz > 8 && psEncC->nb_subfr == 2 ) ||
148 : ( psIndices->contourIndex < 3 && psEncC->fs_kHz == 8 && psEncC->nb_subfr == 2 ) );
149 0 : ec_enc_icdf( psRangeEnc, psIndices->contourIndex, psEncC->pitch_contour_iCDF, 8 );
150 :
151 : /********************/
152 : /* Encode LTP gains */
153 : /********************/
154 : /* PERIndex value */
155 0 : silk_assert( psIndices->PERIndex >= 0 && psIndices->PERIndex < 3 );
156 0 : ec_enc_icdf( psRangeEnc, psIndices->PERIndex, silk_LTP_per_index_iCDF, 8 );
157 :
158 : /* Codebook Indices */
159 0 : for( k = 0; k < psEncC->nb_subfr; k++ ) {
160 0 : silk_assert( psIndices->LTPIndex[ k ] >= 0 && psIndices->LTPIndex[ k ] < ( 8 << psIndices->PERIndex ) );
161 0 : ec_enc_icdf( psRangeEnc, psIndices->LTPIndex[ k ], silk_LTP_gain_iCDF_ptrs[ psIndices->PERIndex ], 8 );
162 : }
163 :
164 : /**********************/
165 : /* Encode LTP scaling */
166 : /**********************/
167 0 : if( condCoding == CODE_INDEPENDENTLY ) {
168 0 : silk_assert( psIndices->LTP_scaleIndex >= 0 && psIndices->LTP_scaleIndex < 3 );
169 0 : ec_enc_icdf( psRangeEnc, psIndices->LTP_scaleIndex, silk_LTPscale_iCDF, 8 );
170 : }
171 0 : silk_assert( !condCoding || psIndices->LTP_scaleIndex == 0 );
172 : }
173 :
174 0 : psEncC->ec_prevSignalType = psIndices->signalType;
175 :
176 : /***************/
177 : /* Encode seed */
178 : /***************/
179 0 : silk_assert( psIndices->Seed >= 0 && psIndices->Seed < 4 );
180 0 : ec_enc_icdf( psRangeEnc, psIndices->Seed, silk_uniform4_iCDF, 8 );
181 0 : }
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