#if (G_BYTE_ORDER == G_LITTLE_ENDIAN)
#define get_unaligned_u24(_x) ( (((guint8*)_x)[0]) | ((((guint8*)_x)[1]) << 8) | ((((guint8*)_x)[2]) << 16) )
#define write_unaligned_u24(_x,samp) do { *(_x)++ = samp & 0xFF; *(_x)++ = (samp >> 8) & 0xFF; *(_x)++ = (samp >> 16) & 0xFF; } while (0)
#else /* BIG ENDIAN */
#define get_unaligned_u24(_x) ( (((guint8*)_x)[2]) | ((((guint8*)_x)[1]) << 8) | ((((guint8*)_x)[0]) << 16) )
#define write_unaligned_u24(_x,samp) do { *(_x)++ = (samp >> 16) & 0xFF; *(_x)++ = (samp >> 8) & 0xFF; *(_x)++ = samp & 0xFF; } while (0)
#endif

static void
volume_process_int24 (GstVolume * this, gpointer bytes, guint n_bytes)
{ 
  gint8 *data = (gint8 *) bytes; /* treat the data as a byte stream */
  guint i, num_samples;
  guint32 samp;
  gint64 val; 

  num_samples = n_bytes / (sizeof (gint8) * 3);
  for (i = 0; i < num_samples; i++) {
    samp = get_unaligned_u24 (data);

    if (samp & 0x800000) samp |= 0xFF000000; /* make signed */
    
    val = (gint32) samp;
    val = (((gint64) this->real_vol_i24 * val) >> VOLUME_UNITY_INT24_BIT_SHIFT);
    samp = (guint32) val;

    /* write the value back into the stream */
    // *data++ = samp & 0xFF; *data++ = (samp >> 8) & 0xFF; *data++ = (samp >> 16) & 0xFF;
    write_unaligned_u24 (data, samp);
  }
}