sublay2.h
上传用户:tuheem
上传日期:2007-05-01
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文件大小:3k
- /* sublay2.cpp
- Layer II subband object declarations */
- /*
- * @(#) subband_layer_2.h 1.8, last edit: 6/15/94 16:51:59
- * @(#) Copyright (C) 1993, 1994 Tobias Bading (bading@cs.tu-berlin.de)
- * @(#) Berlin University of Technology
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #ifndef SUBBAND_LAYER_2_H
- #define SUBBAND_LAYER_2_H
- #include "all.h"
- #include "subband.h"
- #include "header.h"
- #include "crc.h"
- // class for layer II subbands in single channel mode:
- class SubbandLayer2 : public Subband
- {
- protected:
- uint32 subbandnumber;
- uint32 allocation;
- uint32 scfsi;
- real scalefactor1, scalefactor2, scalefactor3;
- uint32 codelength;
- const real *groupingtable;
- real factor;
- uint32 groupnumber;
- uint32 samplenumber;
- real samples[3];
- real c, d;
- uint32 get_allocationlength (Header *);
- void prepare_sample_reading (Header *, uint32, const real **, real *,
- uint32 *, real *, real *);
- public:
- SubbandLayer2 (uint32 subbandnumber);
- void read_allocation (Ibitstream *, Header *, Crc16 *);
- virtual void read_scalefactor_selection (Ibitstream *, Crc16 *);
- void read_scalefactor (Ibitstream *, Header *);
- bool read_sampledata (Ibitstream *);
- bool put_next_sample (e_channels, SynthesisFilter *, SynthesisFilter * = NULL);
- };
- // class for layer II subbands in joint stereo mode:
- class SubbandLayer2IntensityStereo : public SubbandLayer2
- {
- protected:
- uint32 channel2_scfsi;
- real channel2_scalefactor1, channel2_scalefactor2, channel2_scalefactor3;
- public:
- SubbandLayer2IntensityStereo (uint32 subbandnumber);
- void read_allocation (Ibitstream *stream, Header *header, Crc16 *crc)
- {
- SubbandLayer2::read_allocation (stream, header, crc);
- }
- void read_scalefactor_selection (Ibitstream *, Crc16 *);
- void read_scalefactor (Ibitstream *, Header *);
- bool read_sampledata (Ibitstream *stream)
- {
- return SubbandLayer2::read_sampledata (stream);
- }
- bool put_next_sample (e_channels, SynthesisFilter *, SynthesisFilter *);
- };
- // class for layer II subbands in stereo mode:
- class SubbandLayer2Stereo : public SubbandLayer2
- {
- protected:
- uint32 channel2_allocation;
- uint32 channel2_scfsi;
- real channel2_scalefactor1, channel2_scalefactor2, channel2_scalefactor3;
- bool channel2_grouping;
- uint32 channel2_codelength;
- const real *channel2_groupingtable;
- real channel2_factor;
- real channel2_samples[3];
- real channel2_c, channel2_d;
- public:
- SubbandLayer2Stereo (uint32 subbandnumber);
- void read_allocation (Ibitstream *, Header *, Crc16 *);
- void read_scalefactor_selection (Ibitstream *, Crc16 *);
- void read_scalefactor (Ibitstream *, Header *);
- bool read_sampledata (Ibitstream *);
- bool put_next_sample (e_channels, SynthesisFilter *, SynthesisFilter *);
- };
- #endif