ascd/libworkman/include/wm_cdda.h

   1 #ifndef WM_CDDA_H
   2 #define WM_CDDA_H
   3 /*
   4  * $Id: wm_cdda.h,v 1.2 1999/02/14 09:50:46 dirk Exp $
   5  *
   6  * This file is part of WorkMan, the civilized CD player library
   7  * (c) 1991-1997 by Steven Grimm (original author)
   8  * (c) by Dirk Försterling (current 'author' = maintainer)
   9  * The maintainer can be contacted by his e-mail address:
  10  * milliByte@DeathsDoor.com
  11  *
  12  * This library is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU Library General Public
  14  * License as published by the Free Software Foundation; either
  15  * version 2 of the License, or (at your option) any later version.
  16  *
  17  * This library is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * Library General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Library General Public
  23  * License along with this library; if not, write to the Free
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  *
  26  */
  27
  28 /*
  29  * Information about a particular block of CDDA data.
  30  */
  31 struct cdda_block {
  32         unsigned char   status;         /* see below */
  33         unsigned char   track;
  34         unsigned char   index;
  35         unsigned char   minute;
  36         unsigned char   second;
  37         unsigned char   frame;
  38
  39         /* Average volume levels, for level meters */
  40         unsigned char   lev_chan0;
  41         unsigned char   lev_chan1;
  42
  43         /* Current volume setting (0-255) */
  44         unsigned char   volume;
  45
  46         /* Current balance setting (0-255, 128 = balanced) */
  47         unsigned char   balance;
  48 };
  49
  50 /*
  51  * cdda_block status codes.
  52  */
  53 #define WMCDDA_ERROR    0       /* Couldn't read CDDA from disc */
  54 #define WMCDDA_OK       1       /* Read this block successfully (raw data) */
  55 #define WMCDDA_PLAYED   2       /* Just played the block in question */
  56 #define WMCDDA_STOPPED  3       /* Block data invalid; we've just stopped */
  57 #define WMCDDA_ACK      4       /* Acknowledgement of command from parent */
  58 #define WMCDDA_DONE     5       /* Chunk of data is done playing */
  59 #define WMCDDA_EJECTED  6       /* Disc ejected or offline */
  60
  61 /*
  62  * Enable or disable CDDA building depending on platform capabilities, and
  63  * determine endianness based on architecture.  (Gross!)
  64  *
  65  * For header-comfort, the macros LITTLE_ENDIAN and BIG_ENDIAN had to be
  66  * renamed. At least Linux does have bytesex.h and endian.h for easy
  67  * byte-order examination.
  68  */
  69
  70 #ifdef sun
  71 # ifdef SYSV
  72 #  include <sys/types.h>
  73 #  include <sys/cdio.h>
  74 #  ifndef CDROMCDDA
  75 #   undef BUILD_CDDA
  76 #  endif
  77 #  ifdef i386
  78 #   define WM_LITTLE_ENDIAN 1
  79 #   define WM_BIG_ENDIAN 0
  80 #  else
  81 #   define WM_BIG_ENDIAN 1
  82 #   define WM_LITTLE_ENDIAN 0
  83 #  endif
  84 # else
  85 #  undef BUILD_CDDA
  86 # endif
  87 #endif
  88
  89 /* Linux only allows definition of endianness, because there's no
  90  * standard interface for CDROM CDDA functions that aren't available
  91  * if there is no support.
  92  */
  93 #ifdef linux
  94 # include <bytesex.h>
  95 # include <endian.h>
  96 /*
  97  * XXX could this be a problem? The results are only 0 and 1 because
  98  * of the ! operator. How about other linux compilers than gcc ?
  99  */
 100 # define WM_LITTLE_ENDIAN !(__BYTE_ORDER - __LITTLE_ENDIAN)
 101 # define WM_BIG_ENDIAN !(__BYTE_ORDER - __BIG_ENDIAN)
 102 #endif
 103
 104 /*
 105  * The following code shouldn't take effect now.
 106  * In 1998, the WorkMan platforms don't support __PDP_ENDIAN
 107  * architectures.
 108  *
 109  */
 110
 111 #if !WM_LITTLE_ENDIAN
 112 #  if !WM_BIG_ENDIAN
 113 #    error yet unsupported architecture
 114         foo bar this is to stop the compiler.
 115 #  endif
 116 #endif
 117 #endif /* WM_CDDA_H */