Normalize()

[kooBH]

정규화를 내부에서 버퍼 단위로 하려고 했는데

void WAV::Normalize() {
  short max=0;
  int cnt;
  int length = 0;
  int cur_idx = 0;
  float rate = 0;

  if (fmt_type != 1) {
    printf("SORRY::Currently, I do not support Normalize() for other than short type.");
    return;
  }
  short* temp_buf = new short[channels * 128];
  fclose(fp);
  printf("%s\n",file_name);
  fp = fopen(file_name, "rb+");

  Rewind();

  while (!this->IsEOF()) {
    cnt = ReadUnit(temp_buf, channels * 128);
    length += cnt;

    for (int i = 0; i < channels * 128; i++) {
      if (std::abs(temp_buf[i]) > max)
        max = std::abs(temp_buf[i]);
    }
  }
  printf("max : %d\n",max);
  Rewind();
  while (length >= cur_idx) {
   printf("read at : %d\n",ftell(fp));
    cnt = ReadUnit(temp_buf, channels * 128);
    cur_idx += cnt;
  // printf("read : %d | %d | %d\n", cnt,ftell(fp),size_unit);
   printf("read done : %d\n",ftell(fp));
    for (int i = 0; i < cnt; i++) {
      printf("%d ", temp_buf[i]);
      rate = (float)((32767.0 / max));
      temp_buf[i] = (short)(temp_buf[i] * rate);
      //printf("%d\n", temp_buf[i]);
    }
    printf("\n");
    fseek(fp, -size_unit*cnt, SEEK_CUR);
    printf("rollback : %d\n",ftell(fp));
    printf("write at %d\n",ftell(fp));
    fwrite(temp_buf, size_unit, cnt, fp);
    printf("wrote %d\n------------------------------------\n",ftell(fp));
  }

  delete[] temp_buf;
}

잘 안되네,
그냥 내부에 파일 통째로 버퍼로 해서 해야겠다.

-------- WAV HEADER INFOMATION of [ ../s.wav ] ----------
riff_id        : RIFF
riff_size      : 311332
wave_id        : WAVE
fmt_id         : fmt
fmt_size       : 16
fmt_type       : 1 - PCM
channels       : 2
sample_rate    : 16000
byte_rate      : 64000
block_align    : 4
bit_per_sample : 16
data_id        : data
data_size      : 311296
duration       : 4.865 sec
../s.wav
INFO::Rewind
max : 1034
INFO::Rewind
read at : 44
read done : 556
1 4 1 2 0 1 1 1 2 9 3 5 1 10 4 6 -1 4 2 -1 -1 -3 -3 -2 1 -5 -3 -1 2 0 1 3 1 7 0 -3 -4 -8 -2 -12 -4 -8 -1 -6 -2 -5 -2 -3 1 -6 -6 -7 0 -11 -9 -22 -6 -21 -5 -17 -1 1 7 15 3 17 3 4 -1 -3 -2 -4 0 -3 -2 -3 2 4 1 6 2 2 0 4 1 1 2 5 -2 -1 0 -5 -1 1 2 1 0 2 3 12 4 12 5 14 3 10 2 4 2 7 1 7 4 9 3 10 1 8 4 2 -3 4 3 -4 -6 -8 1 -4 -2 1 2 1 0 0 3 11 1 0 0 7 4 5 -2 -1 2 3 -1 -2 -2 -5 -5 -19 -9 -24 -5 -17 -4 -12 -1 -6 -2 -3 0 -6 -6 -7 0 -13 -7 -11 -2 -14 0 3 0 1 7 19 2 10 5 18 7 13 1 15 2 -3 -1 -2 -1 6 5 3 -1 5 -1 -2 2 -3 -3 2 3 2 0 3 1 4 4 7 2 13 5 11 1 7 -1 -6 -4 -13 -2 -7 0 5 3 1 -3 -2 -2 -11 -4 -13 -4 -7 -2 -13 -3 -4 1 -5 -5 -6 -1 -14 -7 -10 3 -1 0 7 5 11 5 17 1 4
rollback : 44
write at 44
wrote 556
------------------------------------
read at : 556
read done : 1068
-2 -13 -3 -4 1 -5 -5 -6 -1 -14 -7 -10 3 -1 0 7 5 11 5 17 1 4 0 -2 -2 -3 1 2 0 -2 -7 -22 -5 -14 -1 -6 -2 -2 1 -1 -2 -3 2 4 1 3 2 7 2 8 -2 -8 -2 -7 -4 -8 0 -7 -3 -4 3 7 6 16 0 8 3 1 -1 3 1 1 1 2 -1 -1 2 4 0 3 -1 -4 -1 -3 -1 -1 -1 -8 -2 -1 2 0 0 8 4 6 -3 -3 2 0 -1 2 2 3 7 20 6 25 4 10 0 3 -2 -11 -3 -5 2 -3 -4 3 7 7 1 14 4 4 0 5 2 1 -2 2 2 -1 0 6 1 -4 -4 -5 2 -1 1 9 8 22 6 20 0 1 -5 -16 -2 -8 0 2 5 14 -1 0 0 -6 -6 -11 0 -5 -1 -1 -1 -3 0 0 0 -5 -3 -1 -3 -15 -6 -18 -5 -11 0 -6 -3 -9 1 9 5 7 4 20 4 9 -1 -4 -6 -16 -3 -9 -1 -8 2 12 8 17 3 17 3 8 0 -6 -7 -11 0 -14 -6 -6 2 -3 0 5 -1 -8 -2 1 2 -3 -2 4 0 -10 -7 -15 -3 -15 -3 -4 2 0 -6 -13 -5 -21 -11 -31 -6 -21 -6 -20 -9 -27 -5 -14 -1 -6
rollback : 556
write at 556
wrote 1068
------------------------------------
read at : 1068
read done : 1580
-2 -13 -3 -4 1 -5 -5 -6 -1 -14 -7 -10 3 -1 0 7 5 11 5 17 1 4 0 -2 -2 -3 1 2 0 -2 -7 -22 -5 -14 -1 -6 -2 -2 1 -1 -2 -3 2 4 1 3 2 7 2 8 -2 -8 -2 -7 -4 -8 0 -7 -3 -4 3 7 6 16 0 8 3 1 -1 3 1 1 1 2 -1 -1 2 4 0 3 -1 -4 -1 -3 -1 -1 -1 -8 -2 -1 2 0 0 8 4 6 -3 -3 2 0 -1 2 2 3 7 20 6 25 4 10 0 3 -2 -11 -3 -5 2 -3 -4 3 7 7 1 14 4 4 0 5 2 1 -2 2 2 -1 0 6 1 -4 -4 -5 2 -1 1 9 8 22 6 20 0 1 -5 -16 -2 -8 0 2 5 14 -1 0 0 -6 -6 -11 0 -5 -1 -1 -1 -3 0 0 0 -5 -3 -1 -3 -15 -6 -18 -5 -11 0 -6 -3 -9 1 9 5 7 4 20 4 9 -1 -4 -6 -16 -3 -9 -1 -8 2 12 8 17 3 17 3 8 0 -6 -7 -11 0 -14 -6 -6 2 -3 0 5 -1 -8 -2 1 2 -3 -2 4 0 -10 -7 -15 -3 -15 -3 -4 2 0 -6 -13 -5 -21 -11 -31 -6 -21 -6 -20 -9 -27 -5 -14 -1 -6
rollback : 1068
write at 1068
wrote 1580
------------------------------------
read at : 1580
read done : 2092
-2 -13 -3 -4 1 -5 -5 -6 -1 -14 -7 -10 3 -1 0 7 5 11 5 17 1 4 0 -2 -2 -3 1 2 0 -2 -7 -22 -5 -14 -1 -6 -2 -2 1 -1 -2 -3 2 4 1 3 2 7 2 8 -2 -8 -2 -7 -4 -8 0 -7 -3 -4 3 7 6 16 0 8 3 1 -1 3 1 1 1 2 -1 -1 2 4 0 3 -1 -4 -1 -3 -1 -1 -1 -8 -2 -1 2 0 0 8 4 6 -3 -3 2 0 -1 2 2 3 7 20 6 25 4 10 0 3 -2 -11 -3 -5 2 -3 -4 3 7 7 1 14 4 4 0 5 2 1 -2 2 2 -1 0 6 1 -4 -4 -5 2 -1 1 9 8 22 6 20 0 1 -5 -16 -2 -8 0 2 5 14 -1 0 0 -6 -6 -11 0 -5 -1 -1 -1 -3 0 0 0 -5 -3 -1 -3 -15 -6 -18 -5 -11 0 -6 -3 -9 1 9 5 7 4 20 4 9 -1 -4 -6 -16 -3 -9 -1 -8 2 12 8 17 3 17 3 8 0 -6 -7 -11 0 -14 -6 -6 2 -3 0 5 -1 -8 -2 1 2 -3 -2 4 0 -10 -7 -15 -3 -15 -3 -4 2 0 -6 -13 -5 -21 -11 -31 -6 -21 -6 -20 -9 -27 -5 -14 -1 -6
rollback : 1580
write at 1580
wrote 2092

[kooBH]

There are 12 sample gap.
Might be caused by HEADER issue.