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 */ 26 typedef 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 42 typedef 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 53 extern void vorbis_bitrate_init(vorbis_info *vi,bitrate_manager_state *bs); 54 extern void vorbis_bitrate_clear(bitrate_manager_state *bs); 55 extern int vorbis_bitrate_managed(vorbis_block *vb); 56 extern int vorbis_bitrate_addblock(vorbis_block *vb); 57 extern int vorbis_bitrate_flushpacket(vorbis_dsp_state *vd, ogg_packet *op); 58 59 #endif 60