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27 
28 #ifndef SILK_STRUCTS_FLP_H
29 #define SILK_STRUCTS_FLP_H
30 
31 #include "typedef.h"
32 #include "main.h"
33 #include "structs.h"
34 
35 #ifdef __cplusplus
36 extern "C"
37 {
38 #endif
39 
40 /********************************/
41 /* Noise shaping analysis state */
42 /********************************/
43 typedef struct {
44     opus_int8                   LastGainIndex;
45     silk_float                  HarmBoost_smth;
46     silk_float                  HarmShapeGain_smth;
47     silk_float                  Tilt_smth;
48 } silk_shape_state_FLP;
49 
50 /********************************/
51 /* Prefilter state              */
52 /********************************/
53 typedef struct {
54     silk_float                  sLTP_shp[ LTP_BUF_LENGTH ];
55     silk_float                  sAR_shp[ MAX_SHAPE_LPC_ORDER + 1 ];
56     opus_int                    sLTP_shp_buf_idx;
57     silk_float                  sLF_AR_shp;
58     silk_float                  sLF_MA_shp;
59     silk_float                  sHarmHP;
60     opus_int32                  rand_seed;
61     opus_int                    lagPrev;
62 } silk_prefilter_state_FLP;
63 
64 /********************************/
65 /* Encoder state FLP            */
66 /********************************/
67 typedef struct {
68     silk_encoder_state          sCmn;                               /* Common struct, shared with fixed-point code */
69     silk_shape_state_FLP        sShape;                             /* Noise shaping state */
70     silk_prefilter_state_FLP    sPrefilt;                           /* Prefilter State */
71 
72     /* Buffer for find pitch and noise shape analysis */
73     silk_float                  x_buf[ 2 * MAX_FRAME_LENGTH + LA_SHAPE_MAX ];/* Buffer for find pitch and noise shape analysis */
74     silk_float                  LTPCorr;                            /* Normalized correlation from pitch lag estimator */
75 } silk_encoder_state_FLP;
76 
77 /************************/
78 /* Encoder control FLP  */
79 /************************/
80 typedef struct {
81     /* Prediction and coding parameters */
82     silk_float                  Gains[ MAX_NB_SUBFR ];
83     silk_float                  PredCoef[ 2 ][ MAX_LPC_ORDER ];     /* holds interpolated and final coefficients */
84     silk_float                  LTPCoef[LTP_ORDER * MAX_NB_SUBFR];
85     silk_float                  LTP_scale;
86     opus_int                    pitchL[ MAX_NB_SUBFR ];
87 
88     /* Noise shaping parameters */
89     silk_float                  AR1[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
90     silk_float                  AR2[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
91     silk_float                  LF_MA_shp[     MAX_NB_SUBFR ];
92     silk_float                  LF_AR_shp[     MAX_NB_SUBFR ];
93     silk_float                  GainsPre[      MAX_NB_SUBFR ];
94     silk_float                  HarmBoost[     MAX_NB_SUBFR ];
95     silk_float                  Tilt[          MAX_NB_SUBFR ];
96     silk_float                  HarmShapeGain[ MAX_NB_SUBFR ];
97     silk_float                  Lambda;
98     silk_float                  input_quality;
99     silk_float                  coding_quality;
100 
101     /* Measures */
102     silk_float                  sparseness;
103     silk_float                  predGain;
104     silk_float                  LTPredCodGain;
105     silk_float                  ResNrg[ MAX_NB_SUBFR ];             /* Residual energy per subframe */
106 
107     /* Parameters for CBR mode */
108     opus_int32                  GainsUnq_Q16[ MAX_NB_SUBFR ];
109     opus_int8                   lastGainIndexPrev;
110 } silk_encoder_control_FLP;
111 
112 /************************/
113 /* Encoder Super Struct */
114 /************************/
115 typedef struct {
116     silk_encoder_state_FLP      state_Fxx[ ENCODER_NUM_CHANNELS ];
117     stereo_enc_state            sStereo;
118     opus_int32                  nBitsUsedLBRR;
119     opus_int32                  nBitsExceeded;
120     opus_int                    nChannelsAPI;
121     opus_int                    nChannelsInternal;
122     opus_int                    nPrevChannelsInternal;
123     opus_int                    timeSinceSwitchAllowed_ms;
124     opus_int                    allowBandwidthSwitch;
125     opus_int                    prev_decode_only_middle;
126 } silk_encoder;
127 
128 #ifdef __cplusplus
129 }
130 #endif
131 
132 #endif
133