blob: a033a89af885b8949ccc938c5681fa4b94d42a58
| 1 | /* |
| 2 | *=================================================================== |
| 3 | * 3GPP AMR Wideband Floating-point Speech Codec |
| 4 | *=================================================================== |
| 5 | */ |
| 6 | #ifndef DEC_MAIN_H |
| 7 | #define DEC_MAIN_H |
| 8 | |
| 9 | #include "typedef.h" |
| 10 | #include "dec_dtx.h" |
| 11 | |
| 12 | #define L_FRAME 256 /* Frame size */ |
| 13 | #define PIT_MAX 231 /* Maximum pitch lag */ |
| 14 | #define L_INTERPOL (16 + 1) /* Length of filter for interpolation */ |
| 15 | #define L_MEANBUF 3 |
| 16 | #define L_FILT 12 /* Delay of up-sampling filter */ |
| 17 | #define L_FILT16k 15 /* Delay of down-sampling filter */ |
| 18 | #define M16k 20 /* Order of LP filter */ |
| 19 | |
| 20 | typedef struct { |
| 21 | Word32 mem_gc_thres; /* threshold for noise enhancer */ |
| 22 | Word16 mem_exc[(L_FRAME + 1) + PIT_MAX + L_INTERPOL];/* old excitation vector */ |
| 23 | Word16 mem_isf_buf[L_MEANBUF * M];/* isf buffer(frequency domain) */ |
| 24 | Word16 mem_hf[2 * L_FILT16k]; /* HF band-pass filter memory */ |
| 25 | Word16 mem_hf2[2 * L_FILT16k]; /* HF band-pass filter memory */ |
| 26 | Word16 mem_hf3[2 * L_FILT16k]; /* HF band-pass filter memory */ |
| 27 | Word16 mem_oversamp[2 * L_FILT]; /* synthesis oversampled filter memory */ |
| 28 | Word16 mem_gain[23]; /* gain decoder memory */ |
| 29 | Word16 mem_syn_hf[M16k]; /* HF synthesis memory */ |
| 30 | Word16 mem_isp[M]; /* old isp (immittance spectral pairs) */ |
| 31 | Word16 mem_isf[M]; /* old isf (frequency domain) */ |
| 32 | Word16 mem_isf_q[M]; /* past isf quantizer */ |
| 33 | Word16 mem_syn_hi[M]; /* modified synthesis memory (MSB) */ |
| 34 | Word16 mem_syn_lo[M]; /* modified synthesis memory (LSB) */ |
| 35 | Word16 mem_ph_disp[8]; /* phase dispersion memory */ |
| 36 | Word16 mem_sig_out[6]; /* hp50 filter memory for synthesis */ |
| 37 | Word16 mem_hp400[6]; /* hp400 filter memory for synthesis */ |
| 38 | Word16 mem_lag[5]; /* LTP lag history */ |
| 39 | Word16 mem_subfr_q[4]; /* old maximum scaling factor */ |
| 40 | Word16 mem_tilt_code; /* tilt of code */ |
| 41 | Word16 mem_q; /* old scaling factor */ |
| 42 | Word16 mem_deemph; /* speech deemph filter memory */ |
| 43 | Word16 mem_seed; /* random memory for frame erasure */ |
| 44 | Word16 mem_seed2; /* random memory for HF generation */ |
| 45 | Word16 mem_seed3; /* random memory for lag concealment */ |
| 46 | Word16 mem_T0; /* old pitch lag */ |
| 47 | Word16 mem_T0_frac; /* old pitch fraction lag */ |
| 48 | UWord16 mem_vad_hist; /* VAD history */ |
| 49 | D_DTX_State *dtx_decSt; |
| 50 | UWord8 mem_bfi; /* Previous BFI */ |
| 51 | UWord8 mem_state; /* BGH state machine memory */ |
| 52 | UWord8 mem_first_frame; /* First frame indicator */ |
| 53 | |
| 54 | } Decoder_State; |
| 55 | |
| 56 | #endif |
| 57 | |
| 58 |