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// JL_vad.h
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// Test
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//
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// Created by DFung on 2018/2/28.
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// Copyright © 2018年 DFung. All rights reserved.
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//
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#ifndef JL_vad_h
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#define JL_vad_h
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#define CONT_AD_ADFRMSIZE 16
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#define DEFAULT_RADIX 12
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#define SMOOTH_WINDOW 4
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#define MIN_FIXLOG -2829416
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#define KWSNUM 1 //¥˝ ∂±¥ ∏ˆ ˝
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//typedef long long __int64;
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typedef int int32;
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typedef short int16;
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typedef signed char int8;
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typedef unsigned int uint32;
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typedef unsigned short uint16;
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typedef unsigned char uint8;
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typedef long long int64;
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typedef int32 fixed32;
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typedef float float32;
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struct noise_stats_s {
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/* Smoothed power */
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int power[40];
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int max_power[40];
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/* Noise estimate */
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int noise[40];
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int max_noise[40];
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/* Signal floor estimate */
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int floor[40];
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int max_floor[40];
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/* Peak for temporal masking */
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int peak[40];
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int max_peak[40];
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int signal[40];
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int gain[40];
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char remove_noi;
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/* Initialize it next time */
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uint8 undefined;
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/* Number of items to process */
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uint32 num_filters;
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/* Sum of slow peaks for VAD */
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int64 slow_peak_sum;
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int64 max_slow_peak_sum;
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/* Precomputed constants */
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int lambda_power;
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int comp_lambda_power;
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int lambda_a;
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int comp_lambda_a;
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int lambda_b;
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int comp_lambda_b;
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int lambda_t;
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int mu_t;
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int max_gain;
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int inv_max_gain;
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int smooth_scaling[2 * 4 + 3];
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};
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typedef struct noise_stats_s noise_stats_t;
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struct htk_fe_s
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{
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unsigned short pow_hist[98];
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noise_stats_t *noise_stats;
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int fe_prior;
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uint32 int_frame;
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char int_flag;
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unsigned char sum_cnt;
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uint8 voice_state;
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uint8 in_speech;
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int16 pre_speech_frames;
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int16 post_speech_frames;
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int16 inout_spch[410];
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int fe_tmp_spch[250];
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int fe_fft_buf[512];
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int fe_mfspec[40];
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int cmn_sum[13];
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int mfcc_fifo[9][13];
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int *cmn_mfcc_fifo[9];
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//int fe_prior;
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char speech_fifo[16];
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char init_speech_n;
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char vad_cnt;
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int buf_cep[21][13];
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int buf_pow[21];
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uint8 speech_indexw;
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uint8 speech_indexr;
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uint8 speech_cnt;
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int16 sp_threshold;
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int16 nsp_threshold;
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};
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typedef struct htk_fe_s htk_fe_t;
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/*
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* How to use? See follow...
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*
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* 1、开启录音前：
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* /--- 开启Vad ---/
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* int need_buf_size = vad_get_need_buf_size();
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* vad_hdl = malloc(need_buf_size);
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* vad_init(vad_hdl, 10, 51);
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*
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* 2、结束录音后：
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* /--- 关闭Vad ---/
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* free(vad_hdl);
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*
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* 3、录音数据回调：
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* buf：录音数据 ，需要320Bytes！
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* ret：0->静音状态 1->正在说话 2->结束说话
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* int ret = vad_main(vad_hdl, (int*)buf);
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*/
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int vad_get_need_buf_size(void);
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int vad_init(void *p, short sp_threshold, short nsp_threshold);
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int vad_main(void *p,int *inout_spch);
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fixed32 fe_log_add(fixed32 x, fixed32 y);
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fixed32 fe_log_sub(fixed32 x, fixed32 y);
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int32 fixlog2(uint32 x);
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int fixlog(uint32 x);
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#endif /* JL_vad_h */
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