adin_file.c

julius version 4.12.about sound recognition.

    has_pre = TRUE;
  }

  gfp = fp;

  return(TRUE);
}

/** 
 * Close the input file
 * 
 * @return TRUE on success, FALSE on failure.
 */
static boolean
adin_file_close()
{
  FILE *fp;

  fp = gfp;
  if (fclose(fp) != 0) {
    jlog("Error: adin_file: failed to close file\n");
    return FALSE;
  }
 return TRUE; 
}

static boolean from_file;	///< TRUE if list file is used to read input filename
static FILE *fp_list;		///< File pointer used for the listfile

/** 
 * Initialization: if listfile is specified, open it here.
 * 
 * @param freq [in] required sampling frequency.
 * @param arg [in] file name of listfile, or NULL if not use
 * 
 * @return TRUE on success, FALSE on failure.
 */
boolean
adin_file_standby(int freq, void *arg)
{
  char *fname = arg;
  if (fname != NULL) {
    /* read input filename from file */
    if ((fp_list = fopen(fname, "r")) == NULL) {
      jlog("Error: adin_file: failed to open %s\n", fname);
      return(FALSE);
    }
    from_file = TRUE;
  } else {
    /* read filename from stdin */
    from_file = FALSE;
  }
  /* store sampling frequency */
  sfreq = freq;
  
  return(TRUE);
}

/** 
 * @brief  Begin reading audio data from a file.
 *
 * If listfile was specified in adin_file_standby(), the next filename
 * will be read from the listfile.  Otherwise, the
 * filename will be obtained from stdin.  Then the file will be opened here.
 * 
 * @return TRUE on success, FALSE on failure.
 */
boolean
adin_file_begin()
{
  boolean readp;

  /* ready to read next input */
  readp = FALSE;
  while(readp == FALSE) {
    if (from_file) {
      /* read file name from listfile */
      do {
	if (getl_fp(speechfilename, MAXPATHLEN, fp_list) == NULL) { /* end of input */
	  fclose(fp_list);
	  return(FALSE); /* end of input */
	}
      } while (speechfilename[0] == '#'); /* skip comment */
    } else {
      /* read file name from stdin */
      if (get_line_from_stdin(speechfilename, MAXPATHLEN, "enter filename->") == NULL) {
	return (FALSE);	/* end of input */
      }
    }
    /* open input file */
    if (adin_file_open(speechfilename) == FALSE) {
      jlog("Error: adin_file: failed to read speech data: \"%s\"\n", speechfilename);
    } else {
      jlog("Stat: adin_file: input speechfile: %s\n", speechfilename);
      readp = TRUE;
    }
  }
  return TRUE;
}

/** 
 * Try to read @a sampnum samples and returns actual sample num recorded.
 * 
 * @param buf [out] samples obtained in this function
 * @param sampnum [in] wanted number of samples to be read
 * 
 * @return actural number of read samples, -1 if EOF, -2 if error.
 */
int
adin_file_read(SP16 *buf, int sampnum)
{
  FILE *fp;
  int cnt;

  fp = gfp;
  
  if (wav_p) {
    cnt = fread(buf, sizeof(SP16), sampnum, fp);
    if (cnt == 0) {
      if (feof(fp)) return -1; /* EOF */
      if (ferror(fp)) {
	jlog("Error: adin_file: an error occured while reading file\n");
	adin_file_close();
	return -2; /* error */
      }
    }
    if (nowlen + cnt > maxlen) {
      cnt = maxlen - nowlen;
    }
    nowlen += cnt;
  } else {
    if (has_pre) {
      buf[0] = pre_data[0]; buf[1] = pre_data[1];
      has_pre = FALSE;
      cnt = fread(&(buf[2]), sizeof(SP16), sampnum - 2, fp);
      if (cnt == 0) {
	if (feof(fp)) return -1; /* EOF */
	if (ferror(fp)) {
	  jlog("Error: adin_file: an error occured file reading file\n");
	  adin_file_close();
	  return -2; /* error */
	}
      }
      cnt += 2;
    } else {
      cnt = fread(buf, sizeof(SP16), sampnum, fp);
      if (cnt == 0) {
	if (feof(fp)) return -1; /* EOF */
	if (ferror(fp)) {
	  jlog("Error: adin_file: an error occured file reading file\n");
	  adin_file_close();
	  return -2; /* error */
	}
      }
    }
  }
  /* all .wav data are in little endian */
  /* assume .raw data are in big endian */
#ifdef WORDS_BIGENDIAN
  if (wav_p) swap_sample_bytes(buf, cnt);
#else
  if (!wav_p) swap_sample_bytes(buf, cnt);
#endif
  return cnt;
}

/** 
 * End recording.
 * 
 * @return TRUE on success, FALSE on failure.
 */
boolean
adin_file_end()
{
  /* nothing needed */
  adin_file_close();
  return TRUE;
}

/** 
 * Initialization for speech input via stdin.
 * 
 * @param freq [in] required sampling frequency.
 * @param arg dummy, ignored
 * 
 * @return TRUE on success, FALSE on failure.
 */
boolean
adin_stdin_standby(int freq, void *arg)
{
  /* store sampling frequency */
  sfreq = freq;
  return(TRUE);
}

/** 
 * @brief  Begin reading audio data from stdin
 *
 * @return TRUE on success, FALSE on failure.
 */
boolean
adin_stdin_begin()
{
  if (feof(stdin)) {		/* already reached the end of input stream */
    jlog("Error: adin_stdin: stdin reached EOF\n");
    return FALSE;		/* terminate search here */
  } else {
    /* open input stream */
    if (adin_file_open(NULL) == FALSE) {
      jlog("Error: adin_stdin: failed to read speech data from stdin\n");
      return FALSE;
    }
    jlog("Stat: adin_stdin: reading wavedata from stdin...\n");
  }
  return TRUE;
}

/** 
 * Try to read @a sampnum samples and returns actual sample num recorded.
 * 
 * @param buf [out] samples obtained in this function
 * @param sampnum [in] wanted number of samples to be read
 * 
 * @return actural number of read samples, -1 if EOF, -2 if error.
 */
int
adin_stdin_read(SP16 *buf, int sampnum)
{
  int cnt;

  if (wav_p) {
    cnt = myfread(buf, sizeof(SP16), sampnum, stdin);
    if (cnt == 0) {
      if (feof(stdin)) return -1; /* EOF */
      if (ferror(stdin)) {
	jlog("Error: adin_stdin: an error occured while reading stdin\n");
	return -2; /* error */
      }
    }
  } else {
    if (has_pre) {
      buf[0] = pre_data[0]; buf[1] = pre_data[1];
      has_pre = FALSE;
      cnt = fread(&(buf[2]), sizeof(SP16), sampnum - 2, stdin);
      if (cnt == 0) {
	if (feof(stdin)) return -1; /* EOF */
	if (ferror(stdin)) {
	  jlog("Error: adin_stdin: an error occured while reading stdin\n");
	  return -2; /* error */
	}
      }
      cnt += 2;
    } else {
      cnt = fread(buf, sizeof(SP16), sampnum, stdin);
      if (cnt == 0) {
	if (feof(stdin)) return -1; /* EOF */
	if (ferror(stdin)) {
	  jlog("Error: adin_stdin: an error occured while reading stdin\n");
	  return -2; /* error */
	}
      }
    }
  }

  /* all .wav data are in little endian */
  /* assume .raw data are in big endian */
#ifdef WORDS_BIGENDIAN
  if (wav_p) swap_sample_bytes(buf, cnt);
#else
  if (!wav_p) swap_sample_bytes(buf, cnt);
#endif
  return cnt;
}

/** 
 * 
 * A tiny function to get current input raw speech file name.
 * 
 * @return string of current input speech file.
 * 
 */
char *
adin_file_get_current_filename()
{
  return(speechfilename);
}