libs/mpega/tag.h

   1 /*
   2  * madplay - MPEG audio decoder and player
   3  * Copyright (C) 2000-2004 Robert Leslie
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  * $Id$
  20  */
  21
  22 # ifndef TAG_H
  23 # define TAG_H
  24
  25 #include "fixed.h"
  26 #include "stream.h"
  27
  28 enum {
  29   TAG_XING = 0x0001,
  30   TAG_LAME = 0x0002,
  31   TAG_VBR  = 0x0100
  32 };
  33
  34 enum {
  35   TAG_XING_FRAMES = 0x00000001L,
  36   TAG_XING_BYTES  = 0x00000002L,
  37   TAG_XING_TOC    = 0x00000004L,
  38   TAG_XING_SCALE  = 0x00000008L
  39 };
  40
  41 enum {
  42   TAG_LAME_NSPSYTUNE   = 0x01,
  43   TAG_LAME_NSSAFEJOINT = 0x02,
  44   TAG_LAME_NOGAP_NEXT  = 0x04,
  45   TAG_LAME_NOGAP_PREV  = 0x08,
  46   TAG_LAME_UNWISE      = 0x10
  47 };
  48
  49 enum tag_lame_vbr {
  50   TAG_LAME_VBR_CONSTANT      = 1,
  51   TAG_LAME_VBR_ABR           = 2,
  52   TAG_LAME_VBR_METHOD1       = 3,
  53   TAG_LAME_VBR_METHOD2       = 4,
  54   TAG_LAME_VBR_METHOD3       = 5,
  55   TAG_LAME_VBR_METHOD4       = 6,
  56   TAG_LAME_VBR_CONSTANT2PASS = 8,
  57   TAG_LAME_VBR_ABR2PASS      = 9
  58 };
  59
  60 enum tag_lame_source {
  61   TAG_LAME_SOURCE_32LOWER  = 0x00,
  62   TAG_LAME_SOURCE_44_1     = 0x01,
  63   TAG_LAME_SOURCE_48       = 0x02,
  64   TAG_LAME_SOURCE_HIGHER48 = 0x03
  65 };
  66
  67 enum tag_lame_mode {
  68   TAG_LAME_MODE_MONO      = 0x00,
  69   TAG_LAME_MODE_STEREO    = 0x01,
  70   TAG_LAME_MODE_DUAL      = 0x02,
  71   TAG_LAME_MODE_JOINT     = 0x03,
  72   TAG_LAME_MODE_FORCE     = 0x04,
  73   TAG_LAME_MODE_AUTO      = 0x05,
  74   TAG_LAME_MODE_INTENSITY = 0x06,
  75   TAG_LAME_MODE_UNDEFINED = 0x07
  76 };
  77
  78 enum tag_lame_surround {
  79   TAG_LAME_SURROUND_NONE      = 0,
  80   TAG_LAME_SURROUND_DPL       = 1,
  81   TAG_LAME_SURROUND_DPL2      = 2,
  82   TAG_LAME_SURROUND_AMBISONIC = 3
  83 };
  84
  85 enum tag_lame_preset {
  86   TAG_LAME_PRESET_NONE          =    0,
  87   TAG_LAME_PRESET_V9            =  410,
  88   TAG_LAME_PRESET_V8            =  420,
  89   TAG_LAME_PRESET_V7            =  430,
  90   TAG_LAME_PRESET_V6            =  440,
  91   TAG_LAME_PRESET_V5            =  450,
  92   TAG_LAME_PRESET_V4            =  460,
  93   TAG_LAME_PRESET_V3            =  470,
  94   TAG_LAME_PRESET_V2            =  480,
  95   TAG_LAME_PRESET_V1            =  490,
  96   TAG_LAME_PRESET_V0            =  500,
  97   TAG_LAME_PRESET_R3MIX         = 1000,
  98   TAG_LAME_PRESET_STANDARD      = 1001,
  99   TAG_LAME_PRESET_EXTREME       = 1002,
 100   TAG_LAME_PRESET_INSANE        = 1003,
 101   TAG_LAME_PRESET_STANDARD_FAST = 1004,
 102   TAG_LAME_PRESET_EXTREME_FAST  = 1005,
 103   TAG_LAME_PRESET_MEDIUM        = 1006,
 104   TAG_LAME_PRESET_MEDIUM_FAST   = 1007
 105 };
 106
 107 struct tag_xing {
 108   long flags;              /* valid fields (see below) */
 109   unsigned long frames;    /* total number of frames */
 110   unsigned long bytes;     /* total number of bytes */
 111   unsigned char toc[100];  /* 100-point seek table */
 112   long scale;              /* VBR quality indicator (0 best - 100 worst) */
 113 };
 114
 115 enum tag_rgain_name {
 116   TAG_RGAIN_NAME_NOT_SET    = 0x0,
 117   TAG_RGAIN_NAME_RADIO      = 0x1,
 118   TAG_RGAIN_NAME_AUDIOPHILE = 0x2
 119 };
 120
 121 enum tag_rgain_originator {
 122   TAG_RGAIN_ORIGINATOR_UNSPECIFIED = 0x0,
 123   TAG_RGAIN_ORIGINATOR_PRESET      = 0x1,
 124   TAG_RGAIN_ORIGINATOR_USER        = 0x2,
 125   TAG_RGAIN_ORIGINATOR_AUTOMATIC   = 0x3
 126 };
 127
 128 struct tag_rgain {
 129   enum tag_rgain_name name;
 130   enum tag_rgain_originator originator;
 131   signed short adjustment;
 132 };
 133
 134 struct tag_lame {
 135   unsigned char revision;
 136   unsigned char flags;
 137
 138   enum tag_lame_vbr vbr_method;
 139   unsigned short lowpass_filter;
 140
 141   mad_fixed_t peak;
 142   struct tag_rgain replay_gain[2];
 143
 144   unsigned char ath_type;
 145   unsigned char bitrate;
 146
 147   unsigned short start_delay;
 148   unsigned short end_padding;
 149
 150   enum tag_lame_source source_samplerate;
 151   enum tag_lame_mode stereo_mode;
 152   unsigned char noise_shaping;
 153
 154   signed char gain;
 155   enum tag_lame_surround surround;
 156   enum tag_lame_preset preset;
 157
 158   unsigned long music_length;
 159   unsigned short music_crc;
 160 };
 161
 162 struct tag {
 163   int flags;
 164   struct tag_xing xing;
 165   struct tag_lame lame;
 166   char encoder[21];
 167 };
 168
 169 void tag_init(struct tag *);
 170
 171 # define tag_finish(tag)        /* nothing */
 172
 173 int tag_parse(struct tag *, struct mad_stream const *);
 174 void tag_parse_rgain(struct tag_rgain *, struct mad_bitptr *);
 175
 176 # endif