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/*
Audio File Library
Copyright (C) 2000, Michael Pruett <michael@68k.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA
*/
/*
units.h
This file defines the internal Unit and CompressionUnit
structures for the Audio File Library.
*/
#ifndef UNIT_H
#define UNIT_H
#include "audiofile.h"
#include "afinternal.h"
struct AudioFormat;
class FileModule;
struct Unit
{
int fileFormat; /* AF_FILEFMT_... */
const char *name; /* a 2-3 word name of the file format */
const char *description; /* a more descriptive name for the format */
const char *label; /* a 4-character label for the format */
bool implemented; /* if implemented */
AFfilesetup (*completesetup) (AFfilesetup setup);
bool (*recognize) (File *fh);
int defaultSampleFormat;
int defaultSampleWidth;
int compressionTypeCount;
const int *compressionTypes;
int markerCount;
int instrumentCount;
int loopPerInstrumentCount;
int instrumentParameterCount;
const InstParamInfo *instrumentParameters;
};
struct CompressionUnit
{
int compressionID; /* AF_COMPRESSION_... */
bool implemented;
const char *label; /* 4-character (approximately) label */
const char *shortname; /* short name in English */
const char *name; /* long name in English */
double squishFactor; /* compression ratio */
int nativeSampleFormat; /* AF_SAMPFMT_... */
int nativeSampleWidth; /* sample width in bits */
bool needsRebuffer; /* if there are chunk boundary requirements */
bool multiple_of; /* can accept any multiple of chunksize */
bool (*fmtok) (AudioFormat *format);
FileModule *(*initcompress) (Track *track, File *fh,
bool seekok, bool headerless, AFframecount *chunkframes);
FileModule *(*initdecompress) (Track *track, File *fh,
bool seekok, bool headerless, AFframecount *chunkframes);
};
#define _AF_NUM_UNITS 17
#define _AF_NUM_COMPRESSION 7
extern const Unit _af_units[_AF_NUM_UNITS];
extern const CompressionUnit _af_compression[_AF_NUM_COMPRESSION];
#endif /* UNIT_H */
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