vpx_mem/memory_manager/hmm_true.c

   1 /*
   2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11
  12 /* This code is in the public domain.
  13 ** Version: 1.1  Author: Walt Karas
  14 */
  15
  16 #include "hmm_intrnl.h"
  17
  18 U(size_aau) U(true_size)(void *payload_ptr)
  19 {
  20     register  head_record *head_ptr = PTR_REC_TO_HEAD(payload_ptr);
  21
  22 #ifdef HMM_AUDIT_FAIL
  23     AUDIT_BLOCK(head_ptr)
  24 #endif
  25
  26     /* Convert block size from BAUs to AAUs.  Subtract head size, leaving
  27     ** payload size.
  28     */
  29     return(
  30               (BLOCK_BAUS(head_ptr) * ((U(size_aau)) HMM_BLOCK_ALIGN_UNIT)) -
  31               HEAD_AAUS);
  32 }