Example #1
0
/*
 * Continuous recognition from a file
 */
static void
recognize_from_file()
{
    int16 adbuf[2048];
    const char *fname;
    const char *hyp;
    int32 k;
    uint8 utt_started, in_speech;
    int32 print_times = cmd_ln_boolean_r(config, "-time");

    fname = cmd_ln_str_r(config, "-infile");
    if ((rawfd = fopen(fname, "rb")) == NULL) {
        E_FATAL_SYSTEM("Failed to open file '%s' for reading",
                       fname);
    }
    
    if (strlen(fname) > 4 && strcmp(fname + strlen(fname) - 4, ".wav") == 0) {
        char waveheader[44];
	fread(waveheader, 1, 44, rawfd);
	if (!check_wav_header(waveheader, (int)cmd_ln_float32_r(config, "-samprate")))
    	    E_FATAL("Failed to process file '%s' due to format mismatch.\n", fname);
    }

    if (strlen(fname) > 4 && strcmp(fname + strlen(fname) - 4, ".mp3") == 0) {
	E_FATAL("Can not decode mp3 files, convert input file to WAV 16kHz 16-bit mono before decoding.\n");
    }
    
    ps_start_utt(ps);
    utt_started = FALSE;

    while ((k = fread(adbuf, sizeof(int16), 2048, rawfd)) > 0) {
        ps_process_raw(ps, adbuf, k, FALSE, FALSE);
        in_speech = ps_get_in_speech(ps);
        if (in_speech && !utt_started) {
            utt_started = TRUE;
        } 
        if (!in_speech && utt_started) {
            ps_end_utt(ps);
            hyp = ps_get_hyp(ps, NULL);
            if (hyp != NULL)
        	printf("%s\n", hyp);
            if (print_times)
        	print_word_times();
            fflush(stdout);

            ps_start_utt(ps);
            utt_started = FALSE;
        }
    }
    ps_end_utt(ps);
    if (utt_started) {
        hyp = ps_get_hyp(ps, NULL);
        if (hyp != NULL) {
    	    printf("%s\n", hyp);
    	    if (print_times) {
    		print_word_times();
	    }
	}
    }
    
    fclose(rawfd);
}
Example #2
0
/*
 * Continuous recognition from a file
 */
static void
recognize_from_file() {
    cont_ad_t *cont;
    ad_rec_t file_ad = {0};
    int16 adbuf[4096];
    const char* hyp;
    const char* uttid;
    int32 k, ts, start;

    char waveheader[44];
    if ((rawfd = fopen(cmd_ln_str_r(config, "-infile"), "rb")) == NULL) {
	E_FATAL_SYSTEM("Failed to open file '%s' for reading",
			cmd_ln_str_r(config, "-infile"));
    }

    fread(waveheader, 1, 44, rawfd);

    file_ad.sps = (int32)cmd_ln_float32_r(config, "-samprate");
    file_ad.bps = sizeof(int16);

    if ((cont = cont_ad_init(&file_ad, ad_file_read)) == NULL) {
        E_FATAL("Failed to initialize voice activity detection");
    }
    if (cont_ad_calib(cont) < 0)
        E_FATAL("Failed to calibrate voice activity detection\n");
    rewind (rawfd);

    for (;;) {

	while ((k = cont_ad_read(cont, adbuf, 4096)) == 0);

        if (k < 0) {
    	    break;
    	}

        if (ps_start_utt(ps, NULL) < 0)
            E_FATAL("ps_start_utt() failed\n");

        ps_process_raw(ps, adbuf, k, FALSE, FALSE);

        ts = cont->read_ts;
        start = ((ts - k) * 100.0) / file_ad.sps;

        for (;;) {
            if ((k = cont_ad_read(cont, adbuf, 4096)) < 0)
            	break;

            if (k == 0) {
                /*
                 * No speech data available; check current timestamp with most recent
                 * speech to see if more than 1 sec elapsed.  If so, end of utterance.
                 */
                if ((cont->read_ts - ts) > DEFAULT_SAMPLES_PER_SEC)
                    break;
            }
            else {
                /* New speech data received; note current timestamp */
                ts = cont->read_ts;
            }


            ps_process_raw(ps, adbuf, k, FALSE, FALSE);
        }

        ps_end_utt(ps);

        if (cmd_ln_boolean_r(config, "-time")) {
	    print_word_times(start);
	} else {
	    hyp = ps_get_hyp(ps, NULL, &uttid);
            fprintf(stderr, "%s: %s\n", uttid, hyp);
        }
        fflush(stdout);
    }

    cont_ad_close(cont);
    fclose(rawfd);
}