aec_demo

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#include <stdio.h>

#include <stdlib.h>

#include <stdint.h>

#include <assert.h>

#include <string.h>

#include <stdbool.h>

#include <speex/speex_preprocess.h>

#include "speex/speex_echo.h"

#include <speex/speex.h>

#define NN 128//每次处理的帧长度，这个一般是从10ms(80) 到30ms(240) 的处理长度

#define TAIL 1024

int main(void) {

        int sampleRate = 16000;

        FILE *mic_fd, *speaker_fd, *out_fd;

        mic_fd = fopen("./audio/mic.wav", "rb");

        speaker_fd = fopen("./audio/spk.wav", "rb");

        out_fd = fopen("./audio/aec.wav", "wb");

        short mic_buf[NN], speaker_buf[NN], out_buf[NN];

        SpeexEchoState *echoState = speex_echo_state_init(NN, TAIL);

        SpeexPreprocessState *preprocessState = speex_preprocess_state_init(NN, sampleRate);

        speex_echo_ctl(echoState, SPEEX_ECHO_SET_SAMPLING_RATE, &sampleRate);

        speex_preprocess_ctl(preprocessState, SPEEX_PREPROCESS_SET_ECHO_STATE, echoState);

        while (!feof(speaker_fd) && !feof(mic_fd)) {

                fread(speaker_buf, sizeof(short), NN, speaker_fd);

                fread(mic_buf, sizeof(short), NN, mic_fd);

                speex_echo_cancellation(echoState, mic_buf, speaker_buf, out_buf);

                speex_preprocess_run(preprocessState, out_buf);

                fwrite(out_buf, sizeof(short), NN, out_fd);

        }

        speex_echo_state_destroy(echoState);

        speex_preprocess_state_destroy(preprocessState);

        fclose(out_fd);

        fclose(mic_fd);

        fclose(speaker_fd);

        printf("=====over\n");

        return 0;

}