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diff --git a/audio_codec/libamr/dec_main.h b/audio_codec/libamr/dec_main.h new file mode 100644 index 0000000..a033a89 --- a/dev/null +++ b/audio_codec/libamr/dec_main.h @@ -0,0 +1,57 @@ +/* + *=================================================================== + * 3GPP AMR Wideband Floating-point Speech Codec + *=================================================================== + */ +#ifndef DEC_MAIN_H +#define DEC_MAIN_H + +#include "typedef.h" +#include "dec_dtx.h" + +#define L_FRAME 256 /* Frame size */ +#define PIT_MAX 231 /* Maximum pitch lag */ +#define L_INTERPOL (16 + 1) /* Length of filter for interpolation */ +#define L_MEANBUF 3 +#define L_FILT 12 /* Delay of up-sampling filter */ +#define L_FILT16k 15 /* Delay of down-sampling filter */ +#define M16k 20 /* Order of LP filter */ + +typedef struct { + Word32 mem_gc_thres; /* threshold for noise enhancer */ + Word16 mem_exc[(L_FRAME + 1) + PIT_MAX + L_INTERPOL];/* old excitation vector */ + Word16 mem_isf_buf[L_MEANBUF * M];/* isf buffer(frequency domain) */ + Word16 mem_hf[2 * L_FILT16k]; /* HF band-pass filter memory */ + Word16 mem_hf2[2 * L_FILT16k]; /* HF band-pass filter memory */ + Word16 mem_hf3[2 * L_FILT16k]; /* HF band-pass filter memory */ + Word16 mem_oversamp[2 * L_FILT]; /* synthesis oversampled filter memory */ + Word16 mem_gain[23]; /* gain decoder memory */ + Word16 mem_syn_hf[M16k]; /* HF synthesis memory */ + Word16 mem_isp[M]; /* old isp (immittance spectral pairs) */ + Word16 mem_isf[M]; /* old isf (frequency domain) */ + Word16 mem_isf_q[M]; /* past isf quantizer */ + Word16 mem_syn_hi[M]; /* modified synthesis memory (MSB) */ + Word16 mem_syn_lo[M]; /* modified synthesis memory (LSB) */ + Word16 mem_ph_disp[8]; /* phase dispersion memory */ + Word16 mem_sig_out[6]; /* hp50 filter memory for synthesis */ + Word16 mem_hp400[6]; /* hp400 filter memory for synthesis */ + Word16 mem_lag[5]; /* LTP lag history */ + Word16 mem_subfr_q[4]; /* old maximum scaling factor */ + Word16 mem_tilt_code; /* tilt of code */ + Word16 mem_q; /* old scaling factor */ + Word16 mem_deemph; /* speech deemph filter memory */ + Word16 mem_seed; /* random memory for frame erasure */ + Word16 mem_seed2; /* random memory for HF generation */ + Word16 mem_seed3; /* random memory for lag concealment */ + Word16 mem_T0; /* old pitch lag */ + Word16 mem_T0_frac; /* old pitch fraction lag */ + UWord16 mem_vad_hist; /* VAD history */ + D_DTX_State *dtx_decSt; + UWord8 mem_bfi; /* Previous BFI */ + UWord8 mem_state; /* BGH state machine memory */ + UWord8 mem_first_frame; /* First frame indicator */ + +} Decoder_State; + +#endif + |