博客
关于我
aec in speex利用Speex进行AEC(回声抑制)的代码实现
阅读量:482 次
发布时间:2019-03-07

本文共 1710 字,大约阅读时间需要 5 分钟。

#include <speex/speex_echo.h>

#include <speex/speex_preprocess.h>

static SpeexEchoState *echo_state = NULL;
static SpeexPreprocessState *denoise_state;
static pthread_mutex_t mutex_aec;
static char* rec_buffer = NULL;
static char* play_buffer = NULL;
static int sampleRate = 8000;
void aec_init(int frame_size)
{
    if(echo_state || denoise_state)
        return;
    rec_buffer = (char*)malloc(frame_size*2);
    play_buffer = (char*)malloc(frame_size*2);
    
    echo_state = speex_echo_state_init(frame_size, frame_size*10);
    denoise_state = speex_preprocess_state_init(frame_size, sampleRate);
    speex_echo_ctl(echo_state, SPEEX_ECHO_SET_SAMPLING_RATE, &sampleRate);
       speex_preprocess_ctl(denoise_state, SPEEX_PREPROCESS_SET_ECHO_STATE, echo_state);
    pthread_mutex_init(&mutex_aec, NULL);
}
void aec_uninit()
{
    if(echo_state)
        speex_echo_state_destroy(echo_state);
    if(denoise_state)
        speex_preprocess_state_destroy(denoise_state);
    echo_state = NULL;
    denoise_state = NULL;
    pthread_mutex_destroy(&mutex_aec);
    if(rec_buffer)
        free(rec_buffer);
    if(play_buffer)
        free(play_buffer);
    play_buffer = NULL;
    rec_buffer = NULL;
}
void aec_record_audio(void* audio_rec_buffer, unsigned int audio_data_len)
{
    if(echo_state == NULL || denoise_state == NULL || rec_buffer == NULL)
        return;
    memset(rec_buffer, 0, audio_data_len);
    speex_echo_capture(echo_state, (spx_int16_t*)audio_rec_buffer, (spx_int16_t*)rec_buffer);
    speex_preprocess_run(denoise_state, (spx_int16_t*)rec_buffer);
    memcpy(audio_rec_buffer, rec_buffer, audio_data_len);
}
void aec_play_audio(void* audio_play_buffer, unsigned int audio_data_len)
{
    if(echo_state == NULL || denoise_state == NULL|| play_buffer == NULL)
        return;
    speex_echo_playback(echo_state, (spx_int16_t*)audio_play_buffer); 
}

转载地址:http://kpedz.baihongyu.com/

你可能感兴趣的文章
mysql5.7示例数据库_Linux MySQL5.7多实例数据库配置
查看>>
Mysql8 数据库安装及主从配置 | Spring Cloud 2
查看>>
mysql8 配置文件配置group 问题 sql语句group不能使用报错解决 mysql8.X版本的my.cnf配置文件 my.cnf文件 能够使用的my.cnf配置文件
查看>>
MySQL8.0.29启动报错Different lower_case_table_names settings for server (‘0‘) and data dictionary (‘1‘)
查看>>
MYSQL8.0以上忘记root密码
查看>>
Mysql8.0以上重置初始密码的方法
查看>>
mysql8.0新特性-自增变量的持久化
查看>>
Mysql8.0注意url变更写法
查看>>
Mysql8.0的特性
查看>>
MySQL8修改密码报错ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
查看>>
MySQL8修改密码的方法
查看>>
Mysql8在Centos上安装后忘记root密码如何重新设置
查看>>
Mysql8在Windows上离线安装时忘记root密码
查看>>
MySQL8找不到my.ini配置文件以及报sql_mode=only_full_group_by解决方案
查看>>
mysql8的安装与卸载
查看>>
MySQL8,体验不一样的安装方式!
查看>>
MySQL: Host '127.0.0.1' is not allowed to connect to this MySQL server
查看>>
Mysql: 对换(替换)两条记录的同一个字段值
查看>>
mysql:Can‘t connect to local MySQL server through socket ‘/var/run/mysqld/mysqld.sock‘解决方法
查看>>
MYSQL:基础——3N范式的表结构设计
查看>>