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/*
* @(#) 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 <stdio.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
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.