speex SpeexPreprocessState: 宏定义
// 降噪
#define SPEEX_PREPROCESS_SET_DENOISE 0
#define SPEEX_PREPROCESS_GET_DENOISE 1
// 增益
#define SPEEX_PREPROCESS_SET_AGC 2
#define SPEEX_PREPROCESS_GET_AGC 3
// 静音检测
#define SPEEX_PREPROCESS_SET_VAD 4
#define SPEEX_PREPROCESS_GET_VAD 5
// 增益级别
#define SPEEX_PREPROCESS_SET_AGC_LEVEL 6
#define SPEEX_PREPROCESS_GET_AGC_LEVEL 7
#define SPEEX_PREPROCESS_SET_DEREVERB 8
#define SPEEX_PREPROCESS_GET_DEREVERB 9
#define SPEEX_PREPROCESS_SET_DEREVERB_LEVEL 10
#define SPEEX_PREPROCESS_GET_DEREVERB_LEVEL 11
#define SPEEX_PREPROCESS_SET_DEREVERB_DECAY 12
#define SPEEX_PREPROCESS_GET_DEREVERB_DECAY 13
// 静音检测的静音概率
#define SPEEX_PREPROCESS_SET_PROB_START 14
#define SPEEX_PREPROCESS_GET_PROB_START 15
// 静音检测的??????设置
#define SPEEX_PREPROCESS_SET_PROB_CONTINUE 16
#define SPEEX_PREPROCESS_GET_PROB_CONTINUE 17
// 得到最大程度的噪音衰减的分贝(负数)
#define SPEEX_PREPROCESS_SET_NOISE_SUPPRESS 18
#define SPEEX_PREPROCESS_GET_NOISE_SUPPRESS 19
// 获得最大限度的残留回声衰减在值(负数)
#define SPEEX_PREPROCESS_SET_ECHO_SUPPRESS 20
#define SPEEX_PREPROCESS_GET_ECHO_SUPPRESS 21
// 获得接近末尾处最大限度的残留回声衰减值(负数)
#define SPEEX_PREPROCESS_SET_ECHO_SUPPRESS_ACTIVE 22
#define SPEEX_PREPROCESS_GET_ECHO_SUPPRESS_ACTIVE 23
// 回声消除状态
#define SPEEX_PREPROCESS_SET_ECHO_STATE 24
#define SPEEX_PREPROCESS_GET_ECHO_STATE 25
// 增益增量
#define SPEEX_PREPROCESS_SET_AGC_INCREMENT 26
#define SPEEX_PREPROCESS_GET_AGC_INCREMENT 27
// 增益减量
#define SPEEX_PREPROCESS_SET_AGC_DECREMENT 28
#define SPEEX_PREPROCESS_GET_AGC_DECREMENT 29
// 增益最大值
#define SPEEX_PREPROCESS_SET_AGC_MAX_GAIN 30
#define SPEEX_PREPROCESS_SET_DENOISE 0
#define SPEEX_PREPROCESS_GET_DENOISE 1
// 增益
#define SPEEX_PREPROCESS_SET_AGC 2
#define SPEEX_PREPROCESS_GET_AGC 3
// 静音检测
#define SPEEX_PREPROCESS_SET_VAD 4
#define SPEEX_PREPROCESS_GET_VAD 5
// 增益级别
#define SPEEX_PREPROCESS_SET_AGC_LEVEL 6
#define SPEEX_PREPROCESS_GET_AGC_LEVEL 7
#define SPEEX_PREPROCESS_SET_DEREVERB 8
#define SPEEX_PREPROCESS_GET_DEREVERB 9
#define SPEEX_PREPROCESS_SET_DEREVERB_LEVEL 10
#define SPEEX_PREPROCESS_GET_DEREVERB_LEVEL 11
#define SPEEX_PREPROCESS_SET_DEREVERB_DECAY 12
#define SPEEX_PREPROCESS_GET_DEREVERB_DECAY 13
// 静音检测的静音概率
#define SPEEX_PREPROCESS_SET_PROB_START 14
#define SPEEX_PREPROCESS_GET_PROB_START 15
// 静音检测的??????设置
#define SPEEX_PREPROCESS_SET_PROB_CONTINUE 16
#define SPEEX_PREPROCESS_GET_PROB_CONTINUE 17
// 得到最大程度的噪音衰减的分贝(负数)
#define SPEEX_PREPROCESS_SET_NOISE_SUPPRESS 18
#define SPEEX_PREPROCESS_GET_NOISE_SUPPRESS 19
// 获得最大限度的残留回声衰减在值(负数)
#define SPEEX_PREPROCESS_SET_ECHO_SUPPRESS 20
#define SPEEX_PREPROCESS_GET_ECHO_SUPPRESS 21
// 获得接近末尾处最大限度的残留回声衰减值(负数)
#define SPEEX_PREPROCESS_SET_ECHO_SUPPRESS_ACTIVE 22
#define SPEEX_PREPROCESS_GET_ECHO_SUPPRESS_ACTIVE 23
// 回声消除状态
#define SPEEX_PREPROCESS_SET_ECHO_STATE 24
#define SPEEX_PREPROCESS_GET_ECHO_STATE 25
// 增益增量
#define SPEEX_PREPROCESS_SET_AGC_INCREMENT 26
#define SPEEX_PREPROCESS_GET_AGC_INCREMENT 27
// 增益减量
#define SPEEX_PREPROCESS_SET_AGC_DECREMENT 28
#define SPEEX_PREPROCESS_GET_AGC_DECREMENT 29
// 增益最大值
#define SPEEX_PREPROCESS_SET_AGC_MAX_GAIN 30
#define SPEEX_PREPROCESS_GET_AGC_MAX_GAIN 31
