1 /********************************************************************
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. *
8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 *
9 * by the XIPHOPHORUS Company http://www.xiph.org/ *
11 ********************************************************************
13 function: bitrate tracking and management
14 last mod: $Id: bitrate.h,v 1.4 2001/12/23 10:12:03 xiphmont Exp $
16 ********************************************************************/
21 #include "vorbis/codec.h"
22 #include "codec_internal.h"
25 /* encode side bitrate tracking */
26 #define BITTRACK_DIVISOR 16
27 #define BITTRACK_BPT 6
28 typedef struct bitrate_manager_state {
29 ogg_uint32_t *queue_binned;
30 ogg_uint32_t *queue_actual;
39 ogg_uint32_t avg_centeracc;
40 ogg_uint32_t avg_sampleacc;
41 ogg_uint32_t avg_sampledesired;
42 ogg_uint32_t avg_centerdesired;
44 long *minmax_binstack;
45 long *minmax_posstack;
46 long *minmax_limitstack;
51 ogg_uint32_t minmax_sampleacc;
52 ogg_uint32_t minmax_sampledesired;
59 long noisetrigger_postpone;
60 double noisetrigger_request;
62 /* unfortunately, we need to hold queued packet data somewhere */
63 oggpack_buffer *queue_packet_buffers;
64 ogg_packet *queue_packets;
66 } bitrate_manager_state;
68 typedef struct bitrate_manager_info{
69 /* detailed bitrate management setup */
70 double queue_avg_time;
71 double queue_avg_center;
72 double queue_minmax_time;
78 double avgfloat_initial; /* set by mode */
79 double avgfloat_minimum; /* set by mode */
80 double avgfloat_downslew_max;
81 double avgfloat_upslew_max;
82 double avgfloat_downhyst;
83 double avgfloat_uphyst;
84 double avgfloat_noise_lowtrigger;
85 double avgfloat_noise_hightrigger;
86 double avgfloat_noise_minval;
87 double avgfloat_noise_maxval;
88 } bitrate_manager_info;
90 extern void vorbis_bitrate_init(vorbis_info *vi,bitrate_manager_state *bs);
91 extern void vorbis_bitrate_clear(bitrate_manager_state *bs);
92 extern int vorbis_bitrate_managed(vorbis_block *vb);
93 extern int vorbis_bitrate_maxmarkers(void);
94 extern int vorbis_bitrate_addblock(vorbis_block *vb);
95 extern int vorbis_bitrate_flushpacket(vorbis_dsp_state *vd, ogg_packet *op);