1 /* 2 *=================================================================== 3 * 3GPP AMR Wideband Floating-point Speech Codec 4 *=================================================================== 5 */ 6 #ifndef ENC_MAIN_H 7 #define ENC_MAIN_H 8 9 #include "typedef.h" 10 #include "enc_dtx.h" 11 12 #define L_FRAME 256 /* Frame size */ 13 #define L_TOTAL 384 /* Total size of speech buffer. */ 14 #define L_FILT16k 15 /* Delay of down-sampling filter */ 15 #define PIT_MAX 231 /* Maximum pitch lag */ 16 #define OPL_DECIM 2 /* Decimation in open-loop pitch analysis */ 17 #define L_INTERPOL (16+1) /* Length of filter for interpolation */ 18 19 typedef struct 20 { 21 /* Float32 */ 22 Float32 mem_speech[L_TOTAL]; /* old speech vector at 12.8kHz */ 23 Float32 mem_wsp[L_FRAME + PIT_MAX / OPL_DECIM]; /* old decimated weighted */ 24 /* speech vector */ 25 Float32 mem_hp_wsp[L_FRAME / OPL_DECIM + (PIT_MAX / OPL_DECIM)]; 26 Float32 mem_decim[2 * L_FILT16k]; /* speech decimated filter memory */ 27 Float32 mem_hf[2 * L_FILT16k]; /* HF band-pass filter memory */ 28 Float32 mem_hf2[2 * L_FILT16k]; /* HF band-pass filter memory */ 29 Float32 mem_hf3[2 * L_FILT16k]; /* HF band-pass filter memory */ 30 Float32 mem_isp[M]; /* old isp (immittance spectral pairs)*/ 31 Float32 mem_syn[M]; /* synthesis memory */ 32 Float32 mem_syn2[M]; /* modified synthesis memory */ 33 Float32 mem_syn_hf[M]; /* HF synthesis memory */ 34 Float32 mem_isf[M]; /* old isf (frequency domain) */ 35 Float32 mem_hf_wsp[9]; /* Open-loop lag gain filter memory */ 36 Float32 mem_sig_in[4]; /* hp50 filter memory */ 37 Float32 mem_sig_out[4]; /* hp50 filter memory for synthesis */ 38 Float32 mem_hp400[4]; /* hp400 filter memory for synthesis */ 39 Float32 mem_decim2[3]; /* wsp decimation filter memory */ 40 Float32 mem_gp_clip[2]; /* gain of pitch clipping memory */ 41 Float32 mem_preemph; /* speech preemph filter memory */ 42 Float32 mem_deemph; /* speech deemph filter memory */ 43 Float32 mem_wsp_df; /* Open-loop LTP deemph filter memory */ 44 Float32 mem_w0; /* target vector memory */ 45 Float32 mem_ol_gain; /* Open-loop gain */ 46 Float32 mem_ada_w; /* weighting level */ 47 Float32 mem_gc_threshold; /* threshold for noise enhancer */ 48 Float32 mem_gain_alpha; /* Higher band gain weighting factor */ 49 50 /* Word32 */ 51 Word32 mem_ol_lag[5]; /* Open loop lag history */ 52 Word32 mem_T0_med; /* weighted open loop pitch lag */ 53 54 /* Word16 */ 55 Word16 mem_exc[(L_FRAME + 1) + PIT_MAX + L_INTERPOL]; 56 /* old excitation vector */ 57 Word16 mem_isp_q[M]; /* quantized old isp */ 58 Word16 mem_isf_q[M]; /* past isf quantizer */ 59 Word16 mem_gain_q[4]; /* gain quantizer memory */ 60 Word16 mem_subfr_q[4]; /* old maximum scaling factor */ 61 Word16 mem_tilt_code; /* tilt of code */ 62 Word16 mem_q; /* old scaling factor */ 63 Word16 mem_seed; /* random memory for HF generation */ 64 65 /* other */ 66 E_DTX_Vad_State *vadSt; 67 E_DTX_State *dtx_encSt; 68 UWord8 mem_first_frame; /* First frame indicator */ 69 UWord8 mem_ol_wght_flg; /* switches lag weighting on and off */ 70 UWord8 mem_vad_hist; /* VAD history */ 71 72 } Coder_State; 73 74 #endif 75 76