FreeCalypso > hg > gsm-codec-lib
view libgsmefr/codec.h @ 556:18aca50d68df default tip
doc/Calypso-TCH-downlink: update for FR1 BFI-with-data
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 11 Oct 2024 01:54:00 +0000 |
parents | d80e9f12a1d1 |
children |
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void Init_Coder_12k2 (struct EFR_encoder_state *st); void Coder_12k2 ( struct EFR_encoder_state *st, Word16 ana[], /* output : Analysis parameters */ Word16 synth[] /* output : Local synthesis */ ); void Init_Decoder_12k2 (struct EFR_decoder_state *st); void Decoder_12k2 ( struct EFR_decoder_state *st, Word16 bfi, /* input : Bad Frame Indication */ const Word16 parm[], /* input : vector of synthesis parameters */ Word16 synth[], /* output: synthesis speech */ Word16 A_t[], /* output: decoded LP filter in 4 subframes */ Word16 TAF, Word16 SID_flag ); void Init_Post_Filter (struct EFR_decoder_state *st); void Post_Filter ( struct EFR_decoder_state *st, Word16 *syn, /* in/out: synthesis speech (postfiltered is output) */ Word16 *Az_4 /* input : interpolated LPC parameters in all subfr. */ ); void code_10i40_35bits ( Word16 x[], /* (i) : target vector */ Word16 cn[], /* (i) : residual after long term prediction */ Word16 h[], /* (i) : impulse response of weighted synthesis filter */ Word16 cod[], /* (o) : algebraic (fixed) codebook excitation */ Word16 y[], /* (o) : filtered fixed codebook excitation */ Word16 indx[] /* (o) : index of 10 pulses (sign + position) */ ); void dec_10i40_35bits ( const Word16 index[],/* (i) : index of 10 pulses (sign+position) */ Word16 cod[] /* (o) : algebraic (fixed) codebook excitation */ ); Word16 Dec_lag6 ( /* output: return integer pitch lag */ struct EFR_decoder_state *st, Word16 index, /* input : received pitch index */ Word16 pit_min, /* input : minimum pitch lag */ Word16 pit_max, /* input : maximum pitch lag */ Word16 i_subfr, /* input : subframe flag */ Word16 L_frame_by2,/* input : speech frame size divided by 2 */ Word16 *T0_frac, /* output: fractional part of pitch lag */ Word16 bfi, /* input : bad frame indicator */ Word16 *T0_min, /* var from one subframe to the next */ Word16 *T0_max /* ditto */ ); Word16 d_gain_pitch ( /* out : quantized pitch gain */ struct EFR_decoder_state *st, Word16 index, /* in : index of quantization */ Word16 bfi, /* in : bad frame indicator (good = 0) */ Word16 state, /* in : state of the state machine */ Word16 prev_bf, /* Previous bf */ Word16 rxdtx_ctrl ); void d_gain_code ( struct EFR_decoder_state *st, Word16 index, /* input : received quantization index */ Word16 code[], /* input : innovation codevector */ Word16 lcode, /* input : codevector length */ Word16 *gain_code, /* output: decoded innovation gain */ Word16 bfi, /* input : bad frame indicator */ Word16 state, /* in : state of the state machine */ Word16 prev_bf, /* Previous bf */ Word16 rxdtx_ctrl, Word16 i_subfr, Word16 rx_dtx_state ); void D_plsf_5 ( struct EFR_decoder_state *st, const Word16 *indice,/* input : quantization indices of 5 submatrices */ Word16 *lsp1_q, /* output: quantized 1st LSP vector */ Word16 *lsp2_q, /* output: quantized 2nd LSP vector */ Word16 bfi, /* input : bad frame indicator (set to 1 if a bad frame is received) */ Word16 rxdtx_ctrl, Word16 rx_dtx_state ); Word16 Enc_lag6 ( /* output: Return index of encoding */ Word16 T0, /* input : Pitch delay */ Word16 *T0_frac, /* in/out: Fractional pitch delay */ Word16 *T0_min, /* in/out: Minimum search delay */ Word16 *T0_max, /* in/out: Maximum search delay */ Word16 pit_min, /* input : Minimum pitch delay */ Word16 pit_max, /* input : Maximum pitch delay */ Word16 pit_flag /* input : Flag for 1st or 3rd subframe */ ); Word16 q_gain_pitch ( /* Return index of quantization */ Word16 *gain /* (i) : Pitch gain to quantize */ ); Word16 q_gain_code ( /* Return quantization index */ struct EFR_encoder_state *st, Word16 code[], /* (i) : fixed codebook excitation */ Word16 lcode, /* (i) : codevector size */ Word16 *gain, /* (i/o) : quantized fixed codebook gain */ Word16 txdtx_ctrl, Word16 i_subfr ); Word16 G_pitch ( /* (o) : Gain of pitch lag saturated to 1.2 */ Word16 xn[], /* (i) : Pitch target. */ Word16 y1[], /* (i) : Filtered adaptive codebook. */ Word16 L_subfr /* : Length of subframe. */ ); Word16 G_code ( /* out : Gain of innovation code. */ Word16 xn[], /* in : target vector */ Word16 y2[] /* in : filtered inovation vector */ ); Word16 Interpol_6 ( /* (o) : interpolated value */ Word16 *x, /* (i) : input vector */ Word16 frac /* (i) : fraction */ ); void Int_lpc ( Word16 lsp_old[], /* input: LSP vector at the 4th subfr. of past frame */ Word16 lsp_mid[], /* input: LSP vector at the 2nd subfr. of present frame */ Word16 lsp_new[], /* input: LSP vector at the 4th subfr. of present frame */ Word16 Az[] /* output: interpolated LP parameters in all subfr. */ ); void Int_lpc2 ( Word16 lsp_old[], /* input: LSP vector at the 4th subfr. of past frame */ Word16 lsp_mid[], /* input: LSP vector at the 2nd subframe of present frame */ Word16 lsp_new[], /* input: LSP vector at the 4th subframe of present frame */ Word16 Az[] /* output:interpolated LP parameters in subframes 1 and 3 */ ); Word16 Pitch_fr6 ( /* (o) : pitch period. */ Word16 exc[], /* (i) : excitation buffer */ Word16 xn[], /* (i) : target vector */ Word16 h[], /* (i) : impulse response of synthesis and weighting filters */ Word16 L_subfr, /* (i) : Length of subframe */ Word16 t0_min, /* (i) : minimum value in the searched range. */ Word16 t0_max, /* (i) : maximum value in the searched range. */ Word16 i_subfr, /* (i) : indicator for first subframe. */ Word16 *pit_frac /* (o) : chosen fraction. */ ); Word16 Pitch_ol ( /* output: open loop pitch lag */ Word16 signal[], /* input: signal used to compute the open loop pitch */ /* signal[-pit_max] to signal[-1] should be known */ Word16 pit_min, /* input : minimum pitch lag */ Word16 pit_max, /* input : maximum pitch lag */ Word16 L_frame /* input : length of frame to compute pitch */ ); void Pred_lt_6 ( Word16 exc[], /* in/out: excitation buffer */ Word16 T0, /* input : integer pitch lag */ Word16 frac, /* input : fraction of lag */ Word16 L_subfr /* input : subframe size */ ); void Q_plsf_5 ( struct EFR_encoder_state *st, Word16 *lsp1, /* input : 1st LSP vector */ Word16 *lsp2, /* input : 2nd LSP vector */ Word16 *lsp1_q, /* output: quantized 1st LSP vector */ Word16 *lsp2_q, /* output: quantized 2nd LSP vector */ Word16 *indice, /* output: quantization indices of 5 matrices */ Word16 txdtx_ctrl /* input : tx dtx control word */ );