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 1994-2001 *
9 * by the XIPHOPHORUS Company http://www.xiph.org/ *
11 ********************************************************************
13 function: PCM data envelope analysis and manipulation
14 last mod: $Id: envelope.h,v 1.21 2002/03/24 21:04:00 xiphmont Exp $
16 ********************************************************************/
30 float delbuf[VE_CONV-1];
33 } envelope_filter_state;
51 envelope_band band[VE_BANDS];
52 envelope_filter_state *filter;
62 extern void _ve_envelope_init(envelope_lookup *e,vorbis_info *vi);
63 extern void _ve_envelope_clear(envelope_lookup *e);
64 extern long _ve_envelope_search(vorbis_dsp_state *v);
65 extern void _ve_envelope_shift(envelope_lookup *e,long shift);
66 extern int _ve_envelope_mark(vorbis_dsp_state *v);