mp3_options.h

本程序为ST公司开发的源代码

# ifndef __OPTIONS_H
# define __OPTIONS_H

   /*
    * $Copyright: 
    * ----------------------------------------------------------------
    * This confidential and proprietary software may be used only as
    * authorised by a licensing agreement from ARM Limited
    *   (C) COPYRIGHT 2001,2002,2004 ARM Limited
    *       ALL RIGHTS RESERVED
    * The entire notice above must be reproduced on all authorised
    * copies and copies may only be made to the extent permitted
    * by a licensing agreement from ARM Limited.
    * ----------------------------------------------------------------
    * File:     options.h,v
    * Revision: 1.13
    * ----------------------------------------------------------------
    * $
    */
  
   /* This file details which sections of code have been replaced  */
   /* by optimised ARM routines                                    */

   /* Each routine R is configured by the #define ARM_R, which can */
   /* take one of the following 3 values:                          */
   /*  0 = Original C code is used - ORIGINAL mode                 */
   /*  1 = Both C and ARM code are inlcuded and results compared   */
   /*      - TEST mode                                             */
   /*  2 = Just optimised ARM code is used - RELEASE mode          */

   /* define whether the CRC check is enabled or not */

# define ENABLECRC 1

   /* define whether MPEG2.5 is supported or not */

# define SUPPORT_MPEG2_5 1

   /* backward compatibility */
   /* if set to 1, decoder does not make optimal use 
    * of the common API; if set to 0, decoder is not 
    * compatible with code that predates the common API.
    * In particular, if set to 1,
    *  - the decoder does not attempt to identify buffers
    *    that can be reused between calls, instead treating
    *    all state as permanent
    *  - the decoder does not allow the final decode stage
    *    to be split or deferred - instead an entire frame
    *    is completely decoded and output for every call to
    *    MP3DecodeFrame, and MP3ProduceOutput is not provided.
    */


   /* old api compatibility veneer */
   /* if set to 1, it will provide a veneer to that presents
    * the old api built upon the new common api
    */

# define ENABLE_OLD_API_VENEER 1

   /* define whether to use the C library divide function */
   /* internally, or define our own                       */

# define USE_C_LIBRARY_DIVIDE 0

   /* C_MODE     -- original code                        */
   /* ARM_TEST   -- ARM tested against original code     */
   /* ARM_MODE   -- optimised ARM only                   */

# define C_MODE     0
# define ARM_TEST   1
# define ARM_MODE   2
# define NOT_YET_WRITTEN 3

   /* now define the mode for each individual routine. */
   /* Much of this is now obsolete...                  */

# define DEFAULT	ARM_TEST

# define ARM_DecodeInfo		ARM_MODE
# define ARM_CRC		ARM_MODE
# define ARM_UnpackBitStream	ARM_MODE
# define ARM_DequantizeI	NOT_YET_WRITTEN
# define ARM_DequantizeII	ARM_MODE
# define ARM_SubBandSynthesis	ARM_MODE
# define ARM_SeekSync		ARM_MODE
# define ARM_ANC_LEN		ARM_MODE
# define ARM_HuffmanIII		ARM_MODE
# define ARM_ScalingIII		ARM_MODE
# define ARM_AntiAlias		ARM_MODE
# define ARM_HybridIII		ARM_MODE
# define ARM_SubBandSynthIII	ARM_MODE
# define ARM_JointStereoIII	ARM_MODE
# define ARM_GetScaleFacIII	ARM_MODE


   /* Select type of final PCM */

# define PCM_TYPE_SHORT 2
# define PCM_TYPE_INT   4

# define PCM_TYPE PCM_TYPE_INT

 
   /* Select size of bit bucket buffer                  */
   /* 7680-bit buffer = 960 bytes. Allocate 1024 bytes, */
   /* which is the next higher power of two             */

# define BITBUCKET_POWER  11
# define BITBUCKET_SIZE 2048



# define REALTIME_PROFILE 0

   /* Define the 'key' used by the versioning scripts */
# define INCLUDE_LAYER 1

   /* end of file */
# endif