ref: a57a6e511f15c02b4fd2690197b6f1333b171193
dir: /sys/src/cmd/audio/libvorbis/bitrate.h/
/********************************************************************
* *
* 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 1994-2002 *
* by the XIPHOPHORUS Company http://www.xiph.org/ *
* *
********************************************************************
function: bitrate tracking and management
last mod: $Id: bitrate.h,v 1.7 2002/07/11 06:40:48 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 */
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;
/* unfortunately, we need to hold queued packet data somewhere */
oggpack_buffer *packetbuffers;
ogg_packet *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_downslew_max;
double avgfloat_upslew_max;
} 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_addblock(vorbis_block *vb);
extern int vorbis_bitrate_flushpacket(vorbis_dsp_state *vd, ogg_packet *op);
#endif