59 lines
3.2 KiB
C
59 lines
3.2 KiB
C
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/*
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*===================================================================
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* 3GPP AMR Wideband Floating-point Speech Codec
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*===================================================================
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*/
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#ifndef DEC_MAIN_H
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#define DEC_MAIN_H
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#include "typedef.h"
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#include "dec_dtx.h"
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#define L_FRAME 256 /* Frame size */
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#define PIT_MAX 231 /* Maximum pitch lag */
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#define L_INTERPOL (16 + 1) /* Length of filter for interpolation */
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#define L_MEANBUF 3
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#define L_FILT 12 /* Delay of up-sampling filter */
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#define L_FILT16k 15 /* Delay of down-sampling filter */
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#define M16k 20 /* Order of LP filter */
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typedef struct
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{
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Word32 mem_gc_thres; /* threshold for noise enhancer */
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Word16 mem_exc[(L_FRAME + 1) + PIT_MAX + L_INTERPOL];/* old excitation vector */
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Word16 mem_isf_buf[L_MEANBUF * M];/* isf buffer(frequency domain) */
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Word16 mem_hf[2 * L_FILT16k]; /* HF band-pass filter memory */
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Word16 mem_hf2[2 * L_FILT16k]; /* HF band-pass filter memory */
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Word16 mem_hf3[2 * L_FILT16k]; /* HF band-pass filter memory */
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Word16 mem_oversamp[2 * L_FILT]; /* synthesis oversampled filter memory */
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Word16 mem_gain[23]; /* gain decoder memory */
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Word16 mem_syn_hf[M16k]; /* HF synthesis memory */
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Word16 mem_isp[M]; /* old isp (immittance spectral pairs) */
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Word16 mem_isf[M]; /* old isf (frequency domain) */
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Word16 mem_isf_q[M]; /* past isf quantizer */
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Word16 mem_syn_hi[M]; /* modified synthesis memory (MSB) */
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Word16 mem_syn_lo[M]; /* modified synthesis memory (LSB) */
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Word16 mem_ph_disp[8]; /* phase dispersion memory */
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Word16 mem_sig_out[6]; /* hp50 filter memory for synthesis */
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Word16 mem_hp400[6]; /* hp400 filter memory for synthesis */
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Word16 mem_lag[5]; /* LTP lag history */
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Word16 mem_subfr_q[4]; /* old maximum scaling factor */
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Word16 mem_tilt_code; /* tilt of code */
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Word16 mem_q; /* old scaling factor */
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Word16 mem_deemph; /* speech deemph filter memory */
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Word16 mem_seed; /* random memory for frame erasure */
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Word16 mem_seed2; /* random memory for HF generation */
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Word16 mem_seed3; /* random memory for lag concealment */
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Word16 mem_T0; /* old pitch lag */
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Word16 mem_T0_frac; /* old pitch fraction lag */
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UWord16 mem_vad_hist; /* VAD history */
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D_DTX_State *dtx_decSt;
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UWord8 mem_bfi; /* Previous BFI */
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UWord8 mem_state; /* BGH state machine memory */
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UWord8 mem_first_frame; /* First frame indicator */
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} Decoder_State;
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#endif
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