enc_main.h
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上传日期：2013-07-19
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- /*
- *===================================================================
- * 3GPP AMR Wideband Floating-point Speech Codec
- *===================================================================
- */
- #ifndef ENC_MAIN_H
- #define ENC_MAIN_H
- #include "typedef.h"
- #include "enc_dtx.h"
- #define L_FRAME 256 /* Frame size */
- #define L_TOTAL 384 /* Total size of speech buffer. */
- #define L_FILT16k 15 /* Delay of down-sampling filter */
- #define PIT_MAX 231 /* Maximum pitch lag */
- #define OPL_DECIM 2 /* Decimation in open-loop pitch analysis */
- #define L_INTERPOL (16+1) /* Length of filter for interpolation */
- typedef struct
- {
- /* Float32 */
- Float32 mem_speech[L_TOTAL]; /* old speech vector at 12.8kHz */
- Float32 mem_wsp[L_FRAME + PIT_MAX / OPL_DECIM]; /* old decimated weighted */
- /* speech vector */
- Float32 mem_hp_wsp[L_FRAME / OPL_DECIM + (PIT_MAX / OPL_DECIM)];
- Float32 mem_decim[2 * L_FILT16k]; /* speech decimated filter memory */
- Float32 mem_hf[2 * L_FILT16k]; /* HF band-pass filter memory */
- Float32 mem_hf2[2 * L_FILT16k]; /* HF band-pass filter memory */
- Float32 mem_hf3[2 * L_FILT16k]; /* HF band-pass filter memory */
- Float32 mem_isp[M]; /* old isp (immittance spectral pairs)*/
- Float32 mem_syn[M]; /* synthesis memory */
- Float32 mem_syn2[M]; /* modified synthesis memory */
- Float32 mem_syn_hf[M]; /* HF synthesis memory */
- Float32 mem_isf[M]; /* old isf (frequency domain) */
- Float32 mem_hf_wsp[9]; /* Open-loop lag gain filter memory */
- Float32 mem_sig_in[4]; /* hp50 filter memory */
- Float32 mem_sig_out[4]; /* hp50 filter memory for synthesis */
- Float32 mem_hp400[4]; /* hp400 filter memory for synthesis */
- Float32 mem_decim2[3]; /* wsp decimation filter memory */
- Float32 mem_gp_clip[2]; /* gain of pitch clipping memory */
- Float32 mem_preemph; /* speech preemph filter memory */
- Float32 mem_deemph; /* speech deemph filter memory */
- Float32 mem_wsp_df; /* Open-loop LTP deemph filter memory */
- Float32 mem_w0; /* target vector memory */
- Float32 mem_ol_gain; /* Open-loop gain */
- Float32 mem_ada_w; /* weighting level */
- Float32 mem_gc_threshold; /* threshold for noise enhancer */
- Float32 mem_gain_alpha; /* Higher band gain weighting factor */
- /* Word32 */
- Word32 mem_ol_lag[5]; /* Open loop lag history */
- Word32 mem_T0_med; /* weighted open loop pitch lag */
- /* Word16 */
- Word16 mem_exc[(L_FRAME + 1) + PIT_MAX + L_INTERPOL];
- /* old excitation vector */
- Word16 mem_isp_q[M]; /* quantized old isp */
- Word16 mem_isf_q[M]; /* past isf quantizer */
- Word16 mem_gain_q[4]; /* gain quantizer memory */
- Word16 mem_subfr_q[4]; /* old maximum scaling factor */
- Word16 mem_tilt_code; /* tilt of code */
- Word16 mem_q; /* old scaling factor */
- Word16 mem_seed; /* random memory for HF generation */
- /* other */
- E_DTX_Vad_State *vadSt;
- E_DTX_State *dtx_encSt;
- UWord8 mem_first_frame; /* First frame indicator */
- UWord8 mem_ol_wght_flg; /* switches lag weighting on and off */
- UWord8 mem_vad_hist; /* VAD history */
- } Coder_State;
- #endif
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