| /******************************************************************** |
| * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * |
| * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * |
| * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * |
| * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * |
| * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009 * |
| * by the Xiph.Org Foundation http://www.xiph.org/ * |
| ******************************************************************** |
| function: PCM data envelope analysis and manipulation |
| last mod: $Id: envelope.h 16227 2009-07-08 06:58:46Z xiphmont $ |
| ********************************************************************/ |
| #define VE_AMP (VE_PRE+VE_POST-1) |
| #define VE_MINSTRETCH 2 /* a bit less than short block */ |
| #define VE_MAXSTRETCH 12 /* one-third full block */ |
| envelope_band band[VE_BANDS]; |
| envelope_filter_state *filter; |
| extern void _ve_envelope_init(envelope_lookup *e,vorbis_info *vi); |
| extern void _ve_envelope_clear(envelope_lookup *e); |
| extern long _ve_envelope_search(vorbis_dsp_state *v); |
| extern void _ve_envelope_shift(envelope_lookup *e,long shift); |
| extern int _ve_envelope_mark(vorbis_dsp_state *v); |