cannam@86: /********************************************************************
cannam@86:  *                                                                  *
cannam@86:  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
cannam@86:  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
cannam@86:  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
cannam@86:  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
cannam@86:  *                                                                  *
cannam@86:  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
cannam@86:  * by the Xiph.Org Foundation http://www.xiph.org/                  *
cannam@86:  *                                                                  *
cannam@86:  ********************************************************************
cannam@86: 
cannam@86:  function: bitrate tracking and management
cannam@86:  last mod: $Id: bitrate.h 13293 2007-07-24 00:09:47Z xiphmont $
cannam@86: 
cannam@86:  ********************************************************************/
cannam@86: 
cannam@86: #ifndef _V_BITRATE_H_
cannam@86: #define _V_BITRATE_H_
cannam@86: 
cannam@86: #include "vorbis/codec.h"
cannam@86: #include "codec_internal.h"
cannam@86: #include "os.h"
cannam@86: 
cannam@86: /* encode side bitrate tracking */
cannam@86: typedef struct bitrate_manager_state {
cannam@86:   int            managed;
cannam@86: 
cannam@86:   long           avg_reservoir;
cannam@86:   long           minmax_reservoir;
cannam@86:   long           avg_bitsper;
cannam@86:   long           min_bitsper;
cannam@86:   long           max_bitsper;
cannam@86: 
cannam@86:   long           short_per_long;
cannam@86:   double         avgfloat;
cannam@86: 
cannam@86:   vorbis_block  *vb;
cannam@86:   int            choice;
cannam@86: } bitrate_manager_state;
cannam@86: 
cannam@86: typedef struct bitrate_manager_info{
cannam@86:   long           avg_rate;
cannam@86:   long           min_rate;
cannam@86:   long           max_rate;
cannam@86:   long           reservoir_bits;
cannam@86:   double         reservoir_bias;
cannam@86: 
cannam@86:   double         slew_damp;
cannam@86: 
cannam@86: } bitrate_manager_info;
cannam@86: 
cannam@86: extern void vorbis_bitrate_init(vorbis_info *vi,bitrate_manager_state *bs);
cannam@86: extern void vorbis_bitrate_clear(bitrate_manager_state *bs);
cannam@86: extern int vorbis_bitrate_managed(vorbis_block *vb);
cannam@86: extern int vorbis_bitrate_addblock(vorbis_block *vb);
cannam@86: extern int vorbis_bitrate_flushpacket(vorbis_dsp_state *vd, ogg_packet *op);
cannam@86: 
cannam@86: #endif