如何找到Espeak是否结束了演讲

我想在程序中使用ESPEAK。我想知道何时停止讲话。是否有任何标志或功能可以检查？

让我们考虑一下这是我的程序：

Line 1
espeak
Line 2

当我执行此代码时，ESPEAK开始说"您好，这是Espeak"，但是在结束之前，执行了代码的第2行，我不喜欢这样。我正在寻找一种 pause的方法，直到Espeak结束讲话！

编辑：这是我的完整代码，我使用pocketsphinx识别用户说的话，然后将其保存在char* hyp中，然后通过speech函数将其通过ESPEAK。

static ps_decoder_t *ps;
static cmd_ln_t *config;
static FILE *rawfd;
espeak_POSITION_TYPE position_type;
espeak_AUDIO_OUTPUT output;
char *path=NULL;
int Buflength = 1000, Options=0;
void* user_data;
char Voice[] = {"English"};
char text2[30] = {"this is a english test"};
unsigned int Size,position=0, end_position=0, flags=espeakCHARS_AUTO, *unique_identifier;
t_espeak_callback *SynthCallback;
espeak_PARAMETER Parm;
//char* text;
static void initFuncs()
{
    output = AUDIO_OUTPUT_PLAYBACK;
    espeak_Initialize(output, Buflength, path, Options ); 
    espeak_SetVoiceByName(Voice);
    const char *langNativeString = "en";
    espeak_VOICE voice;
    memset(&voice, 0, sizeof(espeak_VOICE));
        voice.languages = langNativeString;
        voice.name = "US";
        voice.variant = 2;
        voice.gender = 1;
        espeak_SetVoiceByProperties(&voice);
}
static void sleep_msec(int32 ms)
{
    struct timeval tmo;
    tmo.tv_sec = 0;
    tmo.tv_usec = ms * 1000;
    select(0, NULL, NULL, NULL, &tmo);
}
static void speech(char* hyp)
{
    Size = strlen(hyp)+1;
    espeak_Synth( hyp, Size, position, position_type, end_position, flags,unique_identifier, user_data );
    espeak_Synchronize( );
}
static void recognize_from_microphone()
{
    ad_rec_t *ad;
    int16 adbuf[2048];
    uint8 utt_started, in_speech;
    int32 k;
    char  *hyp;
    if ((ad = ad_open_dev(cmd_ln_str_r(config, "-adcdev"),(int) cmd_ln_float32_r(config,"-samprate"))) == NULL)
        E_FATAL("Failed to open audio devicen");
    if (ad_start_rec(ad) < 0)
        E_FATAL("Failed to start recordingn");
    if (ps_start_utt(ps) < 0)
        E_FATAL("Failed to start utterancen");
    utt_started = FALSE;
    E_INFO("Ready....n");
    for (;;) {
        ad_start_rec(ad);
        if ((k = ad_read(ad, adbuf, 2048)) < 0)
            E_FATAL("Failed to read audion");
        ps_process_raw(ps, adbuf, k, FALSE, FALSE);
        in_speech = ps_get_in_speech(ps);
        if (in_speech && !utt_started) {
            utt_started = TRUE;
            E_INFO("Listening...n");
        }
        if (!in_speech && utt_started) {
            ps_end_utt(ps);
            hyp = (char*)ps_get_hyp(ps, NULL );
            if (hyp != NULL) {
                ad_stop_rec(ad);
                speech(hyp);
                printf("%sn", hyp); 
                fflush(stdout);
            }
            if (ps_start_utt(ps) < 0)
                E_FATAL("Failed to start utterancen");
            utt_started = FALSE;
            E_INFO("Ready....n");
        }
    }//for loop
    ad_close(ad);
}
int main(int argc, char *argv[])
{
    initFuncs();
    config = cmd_ln_init(NULL, ps_args(), TRUE,
                 "-hmm", MODELDIR "/en-us/en-us",
                     "-lm", MODELDIR "/en-us/en-us.lm.bin",
                     "-dict", MODELDIR "/en-us/cmudict-en-us.dict",
                     NULL);
    ps = ps_init(config);
        recognize_from_microphone();
    ps_free(ps);
    cmd_ln_free_r(config);
    return 0;
}