lib/bladeenc/formatbitstream2.h

   1 /*
   2                         (c) Copyright 1998-2000 - Tord Jansson
   3                         ======================================
   4
   5                 This file is part of the BladeEnc MP3 Encoder, based on
   6                 ISO's reference code for MPEG Layer 3 compression, and might
   7                 contain smaller or larger sections that are directly taken
   8                 from ISO's reference code.
   9
  10                 All changes to the ISO reference code herein are either
  11                 copyrighted by Tord Jansson (tord.jansson@swipnet.se)
  12                 or sublicensed to Tord Jansson by a third party.
  13
  14         BladeEnc is free software; you can redistribute this file
  15         and/or modify it under the terms of the GNU Lesser General Public
  16         License as published by the Free Software Foundation; either
  17         version 2.1 of the License, or (at your option) any later version.
  18
  19
  20
  21         ------------    Changes    ------------
  22
  23         2000-12-15  Andre Piotrowski
  24
  25         -       reformatted
  26 */
  27
  28 #ifndef         __FORMATBITSTREAM2__
  29 #define         __FORMATBITSTREAM2__
  30
  31
  32
  33
  34
  35 #define         MAX_CHANNELS                    2
  36 #define         MAX_GRANULES                    2
  37
  38
  39
  40
  41
  42
  43 /*____ Structure Definitions ________________________________________________*/
  44
  45 typedef         struct
  46                         {
  47                                 unsigned int                    value;
  48                                 int                                             length;
  49                         }                                       BitHolderElement;
  50
  51
  52 typedef         struct
  53                         {
  54                                 int                                             max_elements;
  55                                 int                                             nrEntries;
  56                                 BitHolderElement                *element;
  57                         }                                       BitHolder;
  58
  59
  60 typedef         struct BF_FrameData
  61                         {
  62                                 int                                             frameLength;
  63                                 int                                             nGranules;
  64                                 int                                             nChannels;
  65                                 BitHolder                               header;
  66                                 BitHolder                               frameSI;
  67                                 BitHolder                                  channelSI[MAX_CHANNELS];
  68                                 BitHolder                                 spectrumSI[MAX_GRANULES][MAX_CHANNELS];
  69                                 BitHolder                               scaleFactors[MAX_GRANULES][MAX_CHANNELS];
  70                                 BitHolder                                  codedData[MAX_GRANULES][MAX_CHANNELS];
  71                                 BitHolder                               userSpectrum[MAX_GRANULES][MAX_CHANNELS];
  72                                 BitHolder                               userFrameData;
  73                         }                                       BF_FrameData;
  74
  75
  76 typedef         struct BF_FrameResults
  77                         {
  78                                 int                                             SILength;
  79                                 int                                             mainDataLength;
  80                                 int                                             nextBackPtr;
  81                         }                                       BF_FrameResults;
  82
  83
  84
  85
  86
  87 /*____ Function Prototypes __________________________________________________*/
  88
  89 BitHolder                               *initBitHolder (BitHolder *wp, int elements);
  90 void                                    exitBitHolder (BitHolder *wp);
  91 void                                    addBits (BitHolder *wp, unsigned int value, int length);
  92 void                                    writeFrame (BF_FrameData *psFrame, BF_FrameResults *results);
  93 void                                    initFormatBitstream (void);
  94 void                                    exitFormatBitstream (void);
  95 void                                    flushFrame (void);
  96
  97
  98
  99
 100
 101 #endif   /* __FORMATBITSTREAM2__ */