www.pudn.com > bladeenc-0.90.0-src.zip > samplein.h

/* 
 
			(c) Copyright 1998, 1999 - Tord Jansson 
			======================================= 
 
		This file is part of the BladeEnc MP3 Encoder, based on 
		ISO's reference code for MPEG Layer 3 compression. 
 
		This file doesn't contain any of the ISO reference code and 
		is copyright Tord Jansson (tord.jansson@swipnet.se). 
 
	BladeEnc is free software; you can redistribute this file 
	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. 
 
*/ 
 
typedef enum FileType 
{ 
	WAV, 
	AIFF, 
	RAW 
} FileType;  
 
typedef enum	SampleType 
{ 
	STEREO, 
	INVERSE_STEREO, 
	DOWNMIX_MONO, 
	LEFT_CHANNEL_MONO, 
	RIGHT_CHANNEL_MONO 
} SampleType; 
 
typedef struct SplInDef 
{ 
	/* These may be set from the outside after openInput */ 
 
	SampleType		outputType; 
	int				outputFreq; 
 
	/* These may NOT be set from the outside */	 
	 
	unsigned int	length;							/* Length in samples */ 
	int				errcode;					 
	FILE			* fp; 
	unsigned int	samplesLeft; 
 
	/* Input format. Output is always 16-bit signed. */ 
 
	int				freq;							/* Hz */ 
	int				fReadStereo;					/* TRUE = Read sample is in stereo */ 
	int				bits;							/* Bits/sample (8 or 16). */ 
	int				fSign;							/* Signed/unsigned */ 
	int				byteorder;						/* LITTLE_ENDIAN or BIG_ENDIAN */ 
	FileType		filetype;						/* WAV or AIFF */ 
 
	/* The following is only used by some formats */ 
 
	char			preReadBuffer[256]; 
	int				nPreReadBytes; 
	 
} SplIn; 
 
 
 
int	openInput( SplIn * psInfo, char	* pFileName ); 
int	readSamples( SplIn * psInfo, unsigned int nSamples, short * wpSamples ); 
int	closeInput( SplIn * psInfo );