release/src/router/libvorbis/lib/bitrate.h

   1 /********************************************************************
   2  *                                                                  *
   3  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
   4  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
   5  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
   6  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
   7  *                                                                  *
   8  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
   9  * by the Xiph.Org Foundation http://www.xiph.org/                  *
  10  *                                                                  *
  11  ********************************************************************
  12
  13  function: bitrate tracking and management
  14  last mod: $Id: bitrate.h 13293 2007-07-24 00:09:47Z xiphmont $
  15
  16  ********************************************************************/
  17
  18 #ifndef _V_BITRATE_H_
  19 #define _V_BITRATE_H_
  20
  21 #include "vorbis/codec.h"
  22 #include "codec_internal.h"
  23 #include "os.h"
  24
  25 /* encode side bitrate tracking */
  26 typedef struct bitrate_manager_state {
  27   int            managed;
  28
  29   long           avg_reservoir;
  30   long           minmax_reservoir;
  31   long           avg_bitsper;
  32   long           min_bitsper;
  33   long           max_bitsper;
  34
  35   long           short_per_long;
  36   double         avgfloat;
  37
  38   vorbis_block  *vb;
  39   int            choice;
  40 } bitrate_manager_state;
  41
  42 typedef struct bitrate_manager_info{
  43   long           avg_rate;
  44   long           min_rate;
  45   long           max_rate;
  46   long           reservoir_bits;
  47   double         reservoir_bias;
  48
  49   double         slew_damp;
  50
  51 } bitrate_manager_info;
  52
  53 extern void vorbis_bitrate_init(vorbis_info *vi,bitrate_manager_state *bs);
  54 extern void vorbis_bitrate_clear(bitrate_manager_state *bs);
  55 extern int vorbis_bitrate_managed(vorbis_block *vb);
  56 extern int vorbis_bitrate_addblock(vorbis_block *vb);
  57 extern int vorbis_bitrate_flushpacket(vorbis_dsp_state *vd, ogg_packet *op);
  58
  59 #endif