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 1994-2002 *
9 * by the XIPHOPHORUS Company http://www.xiph.org/ *
11 ********************************************************************
13 function: bitrate tracking and management
14 last mod: $Id: bitrate.h,v 1.7 2002/07/11 06:40:48 xiphmont Exp $
16 ********************************************************************/
21 #include "vorbis/codec.h"
22 #include "codec_internal.h"
25 /* encode side bitrate tracking */
26 typedef struct bitrate_manager_state {
27 ogg_uint32_t *queue_binned;
28 ogg_uint32_t *queue_actual;
37 ogg_uint32_t avg_centeracc;
38 ogg_uint32_t avg_sampleacc;
39 ogg_uint32_t avg_sampledesired;
40 ogg_uint32_t avg_centerdesired;
42 long *minmax_binstack;
43 long *minmax_posstack;
44 long *minmax_limitstack;
49 ogg_uint32_t minmax_sampleacc;
50 ogg_uint32_t minmax_sampledesired;
57 /* unfortunately, we need to hold queued packet data somewhere */
58 oggpack_buffer *packetbuffers;
61 } bitrate_manager_state;
63 typedef struct bitrate_manager_info{
64 /* detailed bitrate management setup */
65 double queue_avg_time;
66 double queue_avg_center;
67 double queue_minmax_time;
73 double avgfloat_downslew_max;
74 double avgfloat_upslew_max;
76 } bitrate_manager_info;
78 extern void vorbis_bitrate_init(vorbis_info *vi,bitrate_manager_state *bs);
79 extern void vorbis_bitrate_clear(bitrate_manager_state *bs);
80 extern int vorbis_bitrate_managed(vorbis_block *vb);
81 extern int vorbis_bitrate_addblock(vorbis_block *vb);
82 extern int vorbis_bitrate_flushpacket(vorbis_dsp_state *vd, ogg_packet *op);