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comparison src/codec.h @ 0:56410792419a

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src: original EFR source from ETSI
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 03 Apr 2024 05:31:37 +0000
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-1:000000000000 0:56410792419a
1 void Init_Coder_12k2 (void);
2
3 void Coder_12k2 (
4 Word16 ana[], /* output : Analysis parameters */
5 Word16 synth[] /* output : Local synthesis */
6 );
7
8 void Init_Decoder_12k2 (void);
9
10 void Decoder_12k2 (
11 Word16 parm[], /* input : vector of synthesis parameters
12 parm[0] = bad frame indicator (bfi) */
13 Word16 synth[], /* output: synthesis speech */
14 Word16 A_t[], /* output: decoded LP filter in 4 subframes */
15 Word16 TAF,
16 Word16 SID_flag
17 );
18
19 void Init_Post_Filter (void);
20
21 void Post_Filter (
22 Word16 *syn, /* in/out: synthesis speech (postfiltered is output) */
23 Word16 *Az_4 /* input : interpolated LPC parameters in all subfr. */
24 );
25
26 void code_10i40_35bits (
27 Word16 x[], /* (i) : target vector */
28 Word16 cn[], /* (i) : residual after long term prediction */
29 Word16 h[], /* (i) : impulse response of weighted synthesis
30 filter */
31 Word16 cod[], /* (o) : algebraic (fixed) codebook excitation */
32 Word16 y[], /* (o) : filtered fixed codebook excitation */
33 Word16 indx[] /* (o) : index of 10 pulses (sign + position) */
34 );
35 void dec_10i40_35bits (
36 Word16 index[], /* (i) : index of 10 pulses (sign+position) */
37 Word16 cod[] /* (o) : algebraic (fixed) codebook excitation */
38 );
39 Word16 Dec_lag6 ( /* output: return integer pitch lag */
40 Word16 index, /* input : received pitch index */
41 Word16 pit_min, /* input : minimum pitch lag */
42 Word16 pit_max, /* input : maximum pitch lag */
43 Word16 i_subfr, /* input : subframe flag */
44 Word16 L_frame_by2,/* input : speech frame size divided by 2 */
45 Word16 *T0_frac, /* output: fractional part of pitch lag */
46 Word16 bfi /* input : bad frame indicator */
47 );
48 Word16 d_gain_pitch ( /* out : quantized pitch gain */
49 Word16 index, /* in : index of quantization */
50 Word16 bfi, /* in : bad frame indicator (good = 0) */
51 Word16 state, /* in : state of the state machine */
52 Word16 prev_bf, /* Previous bf */
53 Word16 rxdtx_ctrl
54
55 );
56 void d_gain_code (
57 Word16 index, /* input : received quantization index */
58 Word16 code[], /* input : innovation codevector */
59 Word16 lcode, /* input : codevector length */
60 Word16 *gain_code, /* output: decoded innovation gain */
61 Word16 bfi, /* input : bad frame indicator */
62 Word16 state, /* in : state of the state machine */
63 Word16 prev_bf, /* Previous bf */
64 Word16 rxdtx_ctrl,
65 Word16 i_subfr,
66 Word16 rx_dtx_state
67
68 );
69 void D_plsf_5 (
70 Word16 *indice, /* input : quantization indices of 5 submatrices */
71 Word16 *lsp1_q, /* output: quantized 1st LSP vector */
72 Word16 *lsp2_q, /* output: quantized 2nd LSP vector */
73 Word16 bfi, /* input : bad frame indicator (set to 1 if a bad
74 frame is received) */
75 Word16 rxdtx_ctrl,
76 Word16 rx_dtx_state
77 );
78 Word16 Enc_lag6 ( /* output: Return index of encoding */
79 Word16 T0, /* input : Pitch delay */
80 Word16 *T0_frac, /* in/out: Fractional pitch delay */
81 Word16 *T0_min, /* in/out: Minimum search delay */
82 Word16 *T0_max, /* in/out: Maximum search delay */
83 Word16 pit_min, /* input : Minimum pitch delay */
84 Word16 pit_max, /* input : Maximum pitch delay */
85 Word16 pit_flag /* input : Flag for 1st or 3rd subframe */
86 );
87
88 Word16 q_gain_pitch ( /* Return index of quantization */
89 Word16 *gain /* (i) : Pitch gain to quantize */
90 );
91
92 Word16 q_gain_code ( /* Return quantization index */
93 Word16 code[], /* (i) : fixed codebook excitation */
94 Word16 lcode, /* (i) : codevector size */
95 Word16 *gain, /* (i/o) : quantized fixed codebook gain */
96 Word16 txdtx_ctrl,
97 Word16 i_subfr
98 );
99
100 Word16 G_pitch ( /* (o) : Gain of pitch lag saturated to 1.2 */
101 Word16 xn[], /* (i) : Pitch target. */
102 Word16 y1[], /* (i) : Filtered adaptive codebook. */
103 Word16 L_subfr /* : Length of subframe. */
104 );
105 Word16 G_code ( /* out : Gain of innovation code. */
106 Word16 xn[], /* in : target vector */
107 Word16 y2[] /* in : filtered inovation vector */
108 );
109
110 Word16 Interpol_6 ( /* (o) : interpolated value */
111 Word16 *x, /* (i) : input vector */
112 Word16 frac /* (i) : fraction */
113 );
114 void Int_lpc (
115 Word16 lsp_old[], /* input: LSP vector at the 4th subfr. of past frame */
116 Word16 lsp_mid[], /* input: LSP vector at the 2nd subfr. of
117 present frame */
118 Word16 lsp_new[], /* input: LSP vector at the 4th subfr. of
119 present frame */
120 Word16 Az[] /* output: interpolated LP parameters in all subfr. */
121 );
122 void Int_lpc2 (
123 Word16 lsp_old[], /* input: LSP vector at the 4th subfr. of past frame */
124 Word16 lsp_mid[], /* input: LSP vector at the 2nd subframe of
125 present frame */
126 Word16 lsp_new[], /* input: LSP vector at the 4th subframe of
127 present frame */
128 Word16 Az[] /* output:interpolated LP parameters
129 in subframes 1 and 3 */
130 );
131 Word16 Pitch_fr6 ( /* (o) : pitch period. */
132 Word16 exc[], /* (i) : excitation buffer */
133 Word16 xn[], /* (i) : target vector */
134 Word16 h[], /* (i) : impulse response of synthesis and
135 weighting filters */
136 Word16 L_subfr, /* (i) : Length of subframe */
137 Word16 t0_min, /* (i) : minimum value in the searched range. */
138 Word16 t0_max, /* (i) : maximum value in the searched range. */
139 Word16 i_subfr, /* (i) : indicator for first subframe. */
140 Word16 *pit_frac /* (o) : chosen fraction. */
141 );
142 Word16 Pitch_ol ( /* output: open loop pitch lag */
143 Word16 signal[], /* input: signal used to compute the open loop pitch */
144 /* signal[-pit_max] to signal[-1] should be known */
145 Word16 pit_min, /* input : minimum pitch lag */
146 Word16 pit_max, /* input : maximum pitch lag */
147 Word16 L_frame /* input : length of frame to compute pitch */
148 );
149 void Pred_lt_6 (
150 Word16 exc[], /* in/out: excitation buffer */
151 Word16 T0, /* input : integer pitch lag */
152 Word16 frac, /* input : fraction of lag */
153 Word16 L_subfr /* input : subframe size */
154 );
155 void Q_plsf_5 (
156 Word16 *lsp1, /* input : 1st LSP vector */
157 Word16 *lsp2, /* input : 2nd LSP vector */
158 Word16 *lsp1_q, /* output: quantized 1st LSP vector */
159 Word16 *lsp2_q, /* output: quantized 2nd LSP vector */
160 Word16 *indice, /* output: quantization indices of 5 matrices */
161 Word16 txdtx_ctrl /* input : tx dtx control word */
162 );
163 void Bits2prm_12k2 (
164 Word16 bits[], /* input : serial bits */
165 Word16 prm[] /* output: analysis parameters */
166 );
167 void Prm2bits_12k2 (
168 Word16 prm[], /* input : analysis parameters */
169 Word16 bits[] /* output: serial bits */
170 );