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/media/libvorbis/lib/bitrate.h

http://github.com/zpao/v8monkey
C Header | 59 lines | 31 code | 11 blank | 17 comment | 0 complexity | 962ecce43653707bfab7f6fb36bf80ae MD5 | raw file
 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 */
26typedef 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
42typedef 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
53extern void vorbis_bitrate_init(vorbis_info *vi,bitrate_manager_state *bs);
54extern void vorbis_bitrate_clear(bitrate_manager_state *bs);
55extern int vorbis_bitrate_managed(vorbis_block *vb);
56extern int vorbis_bitrate_addblock(vorbis_block *vb);
57extern int vorbis_bitrate_flushpacket(vorbis_dsp_state *vd, ogg_packet *op);
58
59#endif