sublay1.h
上传用户:tuheem
上传日期:2007-05-01
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文件大小:3k
- /* sublay1.h
- Declarations for Layer I subband objects */
- /*
- * @(#) subband_layer_1.h 1.6, last edit: 6/15/94 16:51:58
- * @(#) 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_1_H
- #define SUBBAND_LAYER_1_H
- #include "all.h"
- #include "subband.h"
- #include "crc.h"
- // class for layer I subbands in single channel mode:
- class SubbandLayer1 : public Subband
- {
- protected:
- uint32 subbandnumber;
- uint32 samplenumber;
- uint32 allocation;
- real scalefactor;
- uint32 samplelength;
- real sample;
- real factor, offset;
- public:
- SubbandLayer1 (uint32 subbandnumber);
- void read_allocation (Ibitstream *, Header *, Crc16 *);
- void read_scalefactor (Ibitstream *, Header *);
- bool read_sampledata (Ibitstream *);
- bool put_next_sample (e_channels, SynthesisFilter *, SynthesisFilter *);
- };
- // class for layer I subbands in joint stereo mode:
- class SubbandLayer1IntensityStereo : public SubbandLayer1
- {
- protected:
- real channel2_scalefactor;
- public:
- SubbandLayer1IntensityStereo (uint32 subbandnumber);
- void read_allocation (Ibitstream *stream, Header *header, Crc16 *crc)
- {
- SubbandLayer1::read_allocation (stream, header, crc);
- }
- void read_scalefactor (Ibitstream *, Header *);
- bool read_sampledata (Ibitstream *stream)
- {
- return SubbandLayer1::read_sampledata (stream);
- }
- bool put_next_sample (e_channels, SynthesisFilter *, SynthesisFilter *);
- };
- // class for layer I subbands in stereo mode:
- class SubbandLayer1Stereo : public SubbandLayer1
- {
- protected:
- uint32 channel2_allocation;
- real channel2_scalefactor;
- uint32 channel2_samplelength;
- real channel2_sample;
- real channel2_factor, channel2_offset;
- public:
- SubbandLayer1Stereo (uint32 subbandnumber);
- void read_allocation (Ibitstream *, Header *, Crc16 *);
- void read_scalefactor (Ibitstream *, Header *);
- bool read_sampledata (Ibitstream *);
- bool put_next_sample (e_channels, SynthesisFilter *, SynthesisFilter *);
- };
- #endif