units.h
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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 Library General Public
License as published by the Free Software Foundation; either
version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307 USA.
*/
/*
units.h
This file defines the internal _Unit and _CompressionUnit
structures for the Audio File Library.
*/
#ifndef UNIT_H
#define UNIT_H
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "audiofile.h"
#include "afinternal.h"
typedef struct _Unit
{
int fileFormat; /* AF_FILEFMT_... */
char *name; /* a 2-3 word name of the file format */
char *description; /* a more descriptive name for the format */
char *label; /* a 4-character label for the format */
bool implemented; /* if implemented */
int (*getversion) (AFfilehandle handle);
AFfilesetup (*completesetup) (AFfilesetup setup);
struct
{
bool (*recognize) (AFvirtualfile *fh);
status (*init) (AFfilesetup, AFfilehandle);
} read;
struct
{
status (*init) (AFfilesetup, AFfilehandle);
bool (*instparamvalid) (AFfilehandle, AUpvlist, int);
status (*update) (AFfilehandle);
} write;
int defaultSampleFormat;
int defaultSampleWidth;
int compressionTypeCount;
int *compressionTypes;
int markerCount;
int instrumentCount;
int loopPerInstrumentCount;
int instrumentParameterCount;
_InstParamInfo *instrumentParameters;
} _Unit;
typedef struct _CompressionUnit
{
int compressionID; /* AF_COMPRESSION_... */
bool implemented;
char *label; /* 4-character (approximately) label */
char *shortname; /* short name in English */
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);
_AFmoduleinst (*initcompress) (_Track *track, AFvirtualfile *fh,
bool seekok, bool headerless, AFframecount *chunkframes);
_AFmoduleinst (*initdecompress) (_Track *track, AFvirtualfile *fh,
bool seekok, bool headerless, AFframecount *chunkframes);
} _CompressionUnit;
#define _AF_NUM_UNITS 6
#define _AF_NUM_COMPRESSION 5
#endif /* UNIT_H */