options.h

本程序为ST公司开发的源代码

# ifndef _OPTIONS_H_
# define _OPTIONS_H_

  COMMENT  /*
  COMMENT   * $Copyright: 
  COMMENT   * ----------------------------------------------------------------
  COMMENT   * This confidential and proprietary software may be used only as
  COMMENT   * authorised by a licensing agreement from ARM Limited
  COMMENT   *   (C) COPYRIGHT 2001 ARM Limited
  COMMENT   *       ALL RIGHTS RESERVED
  COMMENT   * The entire notice above must be reproduced on all authorised
  COMMENT   * copies and copies may only be made to the extent permitted
  COMMENT   * by a licensing agreement from ARM Limited.
  COMMENT   * ----------------------------------------------------------------
  COMMENT   * File:     options.h,v
  COMMENT   * Revision: 1.1
  COMMENT   * ----------------------------------------------------------------
  COMMENT   * $
  COMMENT   *
  COMMENT   * Options relating to ARM-specific parts of the decoder
  COMMENT   */


  COMMENT /* The following ASM defines shoule be 1 for release mode */
# define ASM_POST_FFT  1
# define ASM_PRE_FFT   1
# define ASM_OUT_SAMP  1
# define ASM_STEREO    1
# define ASM_TNS       1
# define ASM_PNS       1
# define ASM_INTENSITY 1

  COMMENT /* define the following to include MPEG4 tools */
# define AAC_LC_MP4    1
# define M4A           1
# define MINIMIZE      1

  COMMENT /* define the following for reduced quality products */
  COMMENT /* NOT FULLY tested yet */
# define AAC_REDUCED_QUALITY_TNS 0

  COMMENT /* constants */
# define DOLBY_MDCT 1  /* necessary for reference code to compile */
# define DOUBLE_WIN 1  /* necessary for reference code to compile */

# define Chans      2  /* 48 */ /* number of main channels: max 48 */
# define CChans     1  /* number of coupling channels: max 1 */

# define ICChans    0  /* set to support independent coupling */

# define BLOCK_LENGTH        1024    /* length of block of data */
# define SHORT_WINDOW_LENGTH  128    /* length of short window */

# define SPECTRUM_QSHIFT 3
# define IDCT_QGAIN (10-4) /* 10=1024 point IDCT and -4 for DCT twiddle stages */
# define WINDOW_COEF_SIZE 16 /* 16 or 32 bit window coeficients */
# define TNS_COEFF_QSHIFT 27
# define DCChans 0

# define PNS_RAND_MULT   1664525
# define PNS_RAND_ADD 1013904223

  COMMENT /* constant derivatives */

# define OUTPUT_QSHIFT (SPECTRUM_QSHIFT+IDCT_QGAIN)
# define OUTPUT_ROUND  (1<<(OUTPUT_QSHIFT-1))

  END
# endif