lib/lame/lame_global_flags.h

   1
   2 #ifndef LAME_GLOBAL_FLAGS_H
   3 #define LAME_GLOBAL_FLAGS_H
   4
   5 struct lame_internal_flags;
   6 typedef struct lame_internal_flags lame_internal_flags;
   7
   8
   9 typedef enum short_block_e {
  10     short_block_not_set = -1,   /* allow LAME to decide */
  11     short_block_allowed = 0,    /* LAME may use them, even different block types for L/R */
  12     short_block_coupled,        /* LAME may use them, but always same block types in L/R */
  13     short_block_dispensed,      /* LAME will not use short blocks, long blocks only */
  14     short_block_forced          /* LAME will not use long blocks, short blocks only */
  15 } short_block_t;
  16
  17 /***********************************************************************
  18 *
  19 *  Control Parameters set by User.  These parameters are here for
  20 *  backwards compatibility with the old, non-shared lib API.
  21 *  Please use the lame_set_variablename() functions below
  22 *
  23 *
  24 ***********************************************************************/
  25 struct lame_global_struct {
  26   /* input description */
  27   unsigned long num_samples;  /* number of samples. default=2^32-1           */
  28   int num_channels;           /* input number of channels. default=2         */
  29   int in_samplerate;          /* input_samp_rate in Hz. default=44.1 kHz     */
  30   int out_samplerate;         /* output_samp_rate.
  31                                    default: LAME picks best value
  32                                    at least not used for MP3 decoding:
  33                                    Remember 44.1 kHz MP3s and AC97           */
  34   float scale;                /* scale input by this amount before encoding
  35                                  at least not used for MP3 decoding          */
  36   float scale_left;           /* scale input of channel 0 (left) by this
  37                                  amount before encoding                      */
  38   float scale_right;          /* scale input of channel 1 (right) by this
  39                                  amount before encoding                      */
  40
  41   /* general control params */
  42   int analysis;               /* collect data for a MP3 frame analyzer?      */
  43   int bWriteVbrTag;           /* add Xing VBR tag?                           */
  44   int decode_only;            /* use lame/mpglib to convert mp3/ogg to wav   */
  45   int ogg;                    /* encode to Vorbis .ogg file                  */
  46
  47   int quality;                /* quality setting 0=best,  9=worst  default=5 */
  48   MPEG_mode mode;             /* see enum in lame.h
  49                                  default = LAME picks best value             */
  50   int mode_fixed;             /* ignored                                     */
  51   int mode_automs;            /* use a m/s threshold based on compression
  52                                  ratio                                       */
  53   int force_ms;               /* force M/S mode.  requires mode=1            */
  54   int free_format;            /* use free format? default=0                  */
  55
  56   /*
  57    * set either brate>0  or compression_ratio>0, LAME will compute
  58    * the value of the variable not set.
  59    * Default is compression_ratio = 11.025
  60    */
  61   int brate;                  /* bitrate                                    */
  62   float compression_ratio;    /* sizeof(wav file)/sizeof(mp3 file)          */
  63
  64
  65   /* frame params */
  66   int copyright;                  /* mark as copyright. default=0           */
  67   int original;                   /* mark as original. default=1            */
  68   int error_protection;           /* use 2 bytes per frame for a CRC
  69                                      checksum. default=0                    */
  70   Padding_type padding_type;      /* PAD_NO = no padding,
  71                                      PAD_ALL = always pad,
  72                                      PAD_ADJUST = adjust padding,
  73                                      default=2                              */
  74   int extension;                  /* the MP3 'private extension' bit.
  75                                      Meaningless                            */
  76   int strict_ISO;                 /* enforce ISO spec as much as possible   */
  77
  78   /* quantization/noise shaping */
  79   int disable_reservoir;          /* use bit reservoir?                     */
  80   int experimentalX;
  81   int experimentalY;
  82   int experimentalZ;
  83   int exp_nspsytune;
  84
  85   double newmsfix;
  86   int preset_expopts;
  87
  88   /* VBR control */
  89   vbr_mode VBR;
  90   int VBR_q;
  91   int VBR_mean_bitrate_kbps;
  92   int VBR_min_bitrate_kbps;
  93   int VBR_max_bitrate_kbps;
  94   int VBR_hard_min;             /* strictly enforce VBR_min_bitrate
  95                                    normaly, it will be violated for analog
  96                                    silence                                 */
  97
  98
  99   /* resampling and filtering */
 100   int lowpassfreq;                /* freq in Hz. 0=lame choses.
 101                                      -1=no filter                          */
 102   int highpassfreq;               /* freq in Hz. 0=lame choses.
 103                                      -1=no filter                          */
 104   int lowpasswidth;               /* freq width of filter, in Hz
 105                                      (default=15%)                         */
 106   int highpasswidth;              /* freq width of filter, in Hz
 107                                      (default=15%)                         */
 108
 109
 110
 111   /*
 112    * psycho acoustics and other arguments which you should not change
 113    * unless you know what you are doing
 114    */
 115   int ATHonly;                    /* only use ATH                         */
 116   int ATHshort;                   /* only use ATH for short blocks        */
 117   int noATH;                      /* disable ATH                          */
 118   int ATHtype;                    /* select ATH formula                   */
 119   float ATHlower;                 /* lower ATH by this many db            */
 120   int athaa_type;                 /* select ATH auto-adjust scheme        */
 121   int athaa_loudapprox;           /* select ATH auto-adjust loudness calc */
 122   float athaa_sensitivity;        /* dB, tune active region of auto-level */
 123   int cwlimit;                    /* predictability limit                 */
 124   short_block_t short_blocks;
 125 /*  int allow_diff_short;            allow blocktypes to differ between
 126                                      channels?                            */
 127   int useTemporal;                /* use temporal masking effect          */
 128 /*  int no_short_blocks;             disable short blocks                 */
 129   int emphasis;                   /* Input PCM is emphased PCM (for
 130                                      instance from one of the rarely
 131                                      emphased CDs), it is STRONGLY not
 132                                      recommended to use this, because
 133                                      psycho does not take it into account,
 134                                      and last but not least many decoders
 135                                      don't care about these bits          */
 136   float msfix;              /* Naoki's adjustment of Mid/Side maskings */
 137
 138   int   tune;               /* 0 off, 1 on */
 139   float tune_value_a;       /* used to pass values for debugging and stuff */
 140
 141
 142   struct {
 143     void (*msgf)  (const char *format, va_list ap);
 144     void (*debugf)(const char *format, va_list ap);
 145     void (*errorf)(const char *format, va_list ap);
 146   } report;
 147
 148   /************************************************************************/
 149   /* internal variables, do not set...                                    */
 150   /* provided because they may be of use to calling application           */
 151   /************************************************************************/
 152
 153   int version;                    /* 0=MPEG-2/2.5  1=MPEG-1               */
 154   int encoder_delay;
 155   int encoder_padding;  /* number of samples of padding appended to input */
 156   int framesize;
 157   int frameNum;                   /* number of frames encoded             */
 158   int lame_allocated_gfp;         /* is this struct owned by calling
 159                                      program or lame?                     */
 160
 161
 162
 163   /****************************************************************************/
 164   /* more internal variables, which will not exist after lame_encode_finish() */
 165   /****************************************************************************/
 166   lame_internal_flags *internal_flags;
 167
 168   /* VBR tags.  This data is here because VBR header is writen after
 169    * input file is closed and *internal_flags struct is free'd */
 170   int TotalFrameSize;
 171   //int* pVbrFrames;
 172   int nVbrNumFrames;
 173   int nVbrFrameBufferSize;
 174
 175
 176 } ;
 177
 178 #endif /* LAME_GLOBAL_FLAGS_H */