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getbits.h
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C/C++ Source or Header
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1998-03-18
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2KB
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80 lines
/* this file is a part of amp software, (C) tomislav uzelac 1996,1997
*/
/* getbits.h
*
* Created by: tomislav uzelac Apr 1996
*/
/* gethdr() error codes
*/
#define GETHDR_ERR 0x1
#define GETHDR_NS 0x2
#define GETHDR_FL1 0x4
#define GETHDR_FL2 0x8
#define GETHDR_FF 0x10
#define GETHDR_SYN 0x20
#define GETHDR_EOF 0x30
/* buffer for the 'bit reservoir'
*/
#define BUFFER_SIZE 4096
#define BUFFER_AUX 2048
extern unsigned char buffer[];
extern int append,data,f_bdirty,bclean_bytes;
/* exports
*/
extern int fillbfr(unsigned int advance);
extern unsigned int getbits(int n);
extern int gethdr(struct AUDIO_HEADER *header);
extern void getcrc(void);
extern void getinfo(struct AUDIO_HEADER *header,struct SIDE_INFO *info);
extern int dummy_getinfo(int n);
extern int rewind_stream(int nbytes);
#ifdef GETBITS
/* buffer, AUX is used in case of input buffer "overflow", and its contents
* are copied to the beginning of the buffer
*/
unsigned char buffer[BUFFER_SIZE+BUFFER_AUX];
/* buffer pointers: append counts in bytes, data in bits
*/
int append,data;
/* bit reservoir stuff. f_bdirty must be set to TRUE when starting play!
*/
int f_bdirty,bclean_bytes;
/* internal buffer, _bptr holds the position in _bits_
*/
static unsigned char _buffer[32];
static int _bptr;
/* buffer and bit manipulation functions
*/
static int _fillbfr(unsigned int size);
static int readsync();
static int get_input(unsigned char* bp, unsigned int size);
static unsigned int _getbits(int n);
int fillbfr(unsigned int advance);
unsigned int getbits(int n);
int dummy_getinfo(int n);
int rewind_stream(int nbytes);
/* header and side info parsing stuff
*/
static void parse_header(struct AUDIO_HEADER *header);
static int header_sanity_check(struct AUDIO_HEADER *header);
int gethdr(struct AUDIO_HEADER *header);
void getcrc();
void getinfo(struct AUDIO_HEADER *header,struct SIDE_INFO *info);
#endif /* GETBITS */