/**********************************************************************MPEG-4 Audio VMaudio i/o streams (.au format)This software module was originally developed byHeiko Purnhagen (University of Hannover)and edited byin the course of development of the MPEG-2 NBC/MPEG-4 Audio standardISO/IEC 13818-7, 14496-1,2 and 3. This software module is animplementation of a part of one or more MPEG-2 NBC/MPEG-4 Audio toolsas specified by the MPEG-2 NBC/MPEG-4 Audio standard. ISO/IEC givesusers of the MPEG-2 NBC/MPEG-4 Audio standards free license to thissoftware module or modifications thereof for use in hardware orsoftware products claiming conformance to the MPEG-2 NBC/ MPEG-4 Audiostandards. Those intending to use this software module in hardware orsoftware products are advised that this use may infringe existingpatents. The original developer of this software module and his/hercompany, the subsequent editors and their companies, and ISO/IEC haveno liability for use of this software module or modifications thereofin an implementation. Copyright is not released for non MPEG-2NBC/MPEG-4 Audio conforming products. The original developer retainsfull right to use the code for his/her own purpose, assign or donatethe code to a third party and to inhibit third party from using thecode for non MPEG-2 NBC/MPEG-4 Audio conforming products. Thiscopyright notice must be included in all copies or derivative works.Copyright (c) 1999.Header file: austream.h$Id: austream.h,v 1.3 1999/04/19 11:13:55 purnhage Exp $Authors:HP    Heiko Purnhagen, Uni Hannover <purnhage@tnt.uni-hannover.de>NM    Nikolaus Meine, Uni Hannover <meine@tnt.uni-hannover.de>Changes:16-sep-98   HP/NM   born, based on au_io.c**********************************************************************//* Audio i/o streaming with stdin/stdout support. *//* Header format: .au (Sun audio file format, aka SND or AFsp) *//* Sample format: 16 bit twos complement, uniform quantisation *//* Data size set to -1 (=unknown) *//* Multi channel data is interleaved: l0 r0 l1 r1 ... *//* Total number of samples (over all channels) is used. */#ifndef _austream_h_#define _austream_h_/* ---------- declarations ---------- */typedef struct AuStreamStruct AuStream;	/* audio stream handle *//* ---------- functions ---------- */#ifdef __cplusplusextern "C" {#endif/* AuInit() *//* Init audio i/o streams. */void AuInit (  int debugLevel);		/* in: debug level */				/*     0=off  1=basic  2=full *//* AuOpenRead() *//* Open audio stream for reading. */AuStream *AuOpenRead (  char *streamName,		/* in: stream name, "-" for stdin */  int *numChannel,		/* out: number of channels */  float *fSample,		/* out: sampling frequency [Hz] */  long *numSample);		/* out: number of samples in stream */				/*      or -1 if not available */				/* returns: */				/*  audio stream (handle) */				/*  or NULL if error *//* AuOpenWrite() *//* Open audio stream for writing. */AuStream *AuOpenWrite (  char *streamName,		/* in: stream name, "-" for stdout */  int numChannel,		/* in: number of channels */  float fSample);		/* in: sampling frequency [Hz] */				/* returns: */				/*  audio stream (handle) */				/*  or NULL if error *//* AuReadData() *//* Read data from audio stream. */long AuReadData (  AuStream *stream,		/* in: audio stream (handle) */  short *data,			/* out: data[] */  long numSample);		/* in: number of samples to be read */				/* returns: */				/*  number of samples read *//* AuWriteData() *//* Write data to audio stream. */void AuWriteData (  AuStream *stream,		/* in: audio stream (handle) */  short *data,			/* in: data[] */  long numSample);		/* in: number of samples to be written *//* AuClose() *//* Close audio stream.*/void AuClose (  AuStream *stream);		/* in: audio stream (handle) */#ifdef __cplusplus}#endif#endif	/* #ifndef _austream_h_ *//* end of austream.h */