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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 *
* by the XIPHOPHORUS Company http://www.xiph.org/ *
* *
********************************************************************
function: bitrate tracking and management
last mod: $Id: bitrate.h,v 1.5 2001/12/23 11:53:52 xiphmont Exp $
********************************************************************/
#ifndef _V_BITRATE_H_
#define _V_BITRATE_H_
#include "vorbis/codec.h"
#include "codec_internal.h"
#include "os.h"
/* encode side bitrate tracking */
#define BITTRACK_DIVISOR 16
#define BITTRACK_BPT 6
typedef struct bitrate_manager_state {
ogg_uint32_t *queue_binned;
ogg_uint32_t *queue_actual;
int queue_size;
int queue_head;
int queue_bins;
long *avg_binacc;
int avg_center;
int avg_tail;
ogg_uint32_t avg_centeracc;
ogg_uint32_t avg_sampleacc;
ogg_uint32_t avg_sampledesired;
ogg_uint32_t avg_centerdesired;
long *minmax_binstack;
long *minmax_posstack;
long *minmax_limitstack;
long minmax_stackptr;
long minmax_acctotal;
int minmax_tail;
ogg_uint32_t minmax_sampleacc;
ogg_uint32_t minmax_sampledesired;
int next_to_flush;
int last_to_flush;
double avgfloat;
double avgnoise;
long noisetrigger_postpone;
double noisetrigger_request;
/* unfortunately, we need to hold queued packet data somewhere */
oggpack_buffer *queue_packet_buffers;
ogg_packet *queue_packets;
} bitrate_manager_state;
typedef struct bitrate_manager_info{
/* detailed bitrate management setup */
double queue_avg_time;
double queue_avg_center;
double queue_minmax_time;
double queue_hardmin;
double queue_hardmax;
double queue_avgmin;
double queue_avgmax;
double avgfloat_initial; /* set by mode */
double avgfloat_minimum; /* set by mode */
double avgfloat_downslew_max;
double avgfloat_upslew_max;
double avgfloat_noise_lowtrigger;
double avgfloat_noise_hightrigger;
double avgfloat_noise_minval;
double avgfloat_noise_maxval;
} bitrate_manager_info;
extern void vorbis_bitrate_init(vorbis_info *vi,bitrate_manager_state *bs);
extern void vorbis_bitrate_clear(bitrate_manager_state *bs);
extern int vorbis_bitrate_managed(vorbis_block *vb);
extern int vorbis_bitrate_maxmarkers(void);
extern int vorbis_bitrate_addblock(vorbis_block *vb);
extern int vorbis_bitrate_flushpacket(vorbis_dsp_state *vd, ogg_packet *op);
#endif
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