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 1.19 2002/03/17 19:50:47 xiphmont Exp $
16 ********************************************************************/
30 float delbuf[VE_CONV-1];
32 } envelope_filter_state;
49 envelope_band band[VE_BANDS];
50 envelope_filter_state *filter;
60 extern void _ve_envelope_init(envelope_lookup *e,vorbis_info *vi);
61 extern void _ve_envelope_clear(envelope_lookup *e);
62 extern long _ve_envelope_search(vorbis_dsp_state *v);
63 extern void _ve_envelope_shift(envelope_lookup *e,long shift);
64 extern int _ve_envelope_mark(vorbis_dsp_state *v);