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
60