mpegimdc.i

mp3解码源代码

 






 




















 




 





typedef struct {
	INT16	ID;
	INT16	layer;
	INT16	protection_bit;
	INT16	bitrate_index;
	INT16	sampling_frequency;
	BOOL	padding_bit;
	BOOL	private_bit;
	INT16	mode;
	INT16	mode_extension;
	BOOL	copyright;
	BOOL	original;
	INT16	emphasis;
	INT16	crc_check;
	BOOL	half_freq;  
	INT32	header_pos;
} MPA_HEADER;

 


typedef struct {
	UINT16	part2_3_length;         
	UINT16	big_values;             
	UINT16	global_gain;            
	UINT16	scalefac_compress;      
	BOOL	window_switching_flag;
	UINT16	block_type;             
	BOOL	mixed_block_flag;
	UINT16	table_select[ 3 ];      
	UINT16	subblock_gain[ 3 ];     
	UINT16	region0_count;          
	UINT16	region1_count;          
	BOOL	preflag;
	BOOL	scalefac_scale;         
	UINT16	count1table_select;     
} MPA_GRANULE_INFO;

 


typedef struct {
	UINT16	main_data_begin;        
	UINT16	private_bits;           
	struct {
		BOOL scfsi[4];
		MPA_GRANULE_INFO gr[2 ];
	} ch[2 ];
} MPA_SIDE_INFO;

 




typedef struct {
   UINT16	l[23];
   UINT16	s[3 ][13];
} MPA_SCALE_FAC3;












# 1 "mpegsub.h" 1
 

 






















 


 

# 1 "mpegtab.h" 1
 

 






















 


 

typedef struct {
	UINT16	treelen;
	UINT16	xlen;
	UINT16	ylen;
	UINT16	linbits;
	UINT16	linmax;
	const unsigned char (*val)[2];
} MPT_HUFF;








extern const INT32 	MPT_pow_4_3[8192];





extern const INT32 	MPT_multiple[64];
extern const INT16 	MPT_dewindow[512];

extern const UINT16	MPT_freq[2][4];
extern const INT16	MPT_bitrate[2][3][16];
extern const INT16	MPT_sblimit[5];
extern const INT16	MPT_jsbound[3][4];

 


extern const UINT8	MPT_alloc_0[][16];
extern const UINT8	MPT_alloc_1[][16];
extern const UINT8	MPT_alloc_2[][16];
extern const UINT8	MPT_alloc_3[][16];
extern const UINT8	MPT_alloc_4[][16];

 

# 31 "mpegsub.h" 2


typedef struct {
	INT16 	bb[2 ][2 * 512 ];
	INT16 	scaled_dewindow[512 ];

	INT32	scaled_shift;

	INT32	scale_percent;
	INT16	b_offset[ 2  ];
	INT16	freq_div;
	INT16	quality;
	INT16	w_begin;
	INT16	w_width;
	INT16	pcm_count;
} MPEGSUB;


extern int	MPEGSUB_reset(MPEGSUB *mpegsub);
extern MPEGSUB	*MPEGSUB_open(INT16 freq_div, INT16 quality);
extern void	MPEGSUB_close(MPEGSUB *mpegsub);
extern INT16	MPEGSUB_synthesis(MPEGSUB *mpegsub,
			INT16  *band_ptr,
			INT16 channel, INT16 *samples);
extern int	MPEGSUB_scale(MPEGSUB *mpegsub, INT32 scale_percent);

 

# 156 "mpegaud.h" 2

# 1 "mpegimdc.h" 1
 

 






















 


 



typedef struct {
	INT16  	prevblk[2][18*32];
} MPEGIMDCT;

extern MPEGIMDCT *MPEGIMDCT_open(void);
extern void	MPEGIMDCT_close(MPEGIMDCT *mpegimdct);
extern int	MPEGIMDCT_reset(MPEGIMDCT *mpegimdct);
extern int	MPEGIMDCT_hybrid(MPEGIMDCT *mpegimdct, INT16  *in,
			INT16  *out, INT16 block_type, BOOL mixed,
			INT16 ch, INT16 sb_max);

 

# 157 "mpegaud.h" 2


 



typedef struct {
	const UINT8	(*alloc)[16];  
	INT16		bit_alloc[2 ][32 ];
	INT32  scale[2 ][3 ][32 ];
	UINT16		sample[2 ][3 ][32 ];
	INT16  fraction[2 ][3 ][32 ];

	INT16		is[576 ];
	INT16  xr[2 ][576 ];
	INT16  lr[2 ][576 ];

	INT16		*pcm[2 ];
	INT16		scfsi[2 ][32 ];
	MPA_SCALE_FAC3	scale_fac3[2 ];

	BITSTREAM	*bitstream;
	HUFFMAN		*huffman;
	MPEGSUB		*mpegsub;
	MPEGIMDCT	*mpegimdct;

	MPA_HEADER	header;
	MPA_SIDE_INFO	side_info;
	BOOL		stereo;
	INT16		channels;
	UINT16		sfreq;
	UINT32		stream_size;
	INT16		bitrate;
	INT16		jsbound;
	INT16		sblimit;
	INT16		current_table;
	UINT32		frame;

	INT16		freq_div;
	INT16		quality;
	INT16		sb_max;
	BOOL		force_mono;

	INT16		sfb_nul_l[2 ];
	INT16		sfb_nul_s[3 ][2 ];

	 
	INT16		is_max_l[21];
	INT16		is_max_s[3 ][12];

	BOOL		need_sync;
	INT16		imdct_max[2 ];
	INT16		sfb_nul_s_top[3 ];

	INT32		bitstream_start_pos;
	void		*keyp;
} MPA_STREAM;

 

# 29 "mpegimdc.c" 2


# 1 "/home/gerg/new-wave.5249/lib/libc/include/math.h" 1
# 1 "/home/gerg/new-wave.5249/lib/libc/include/machine/__math.h" 1
 





















 

# 450 "/home/gerg/new-wave.5249/lib/libc/include/machine/__math.h"


# 1 "/home/gerg/new-wave.5249/lib/libm/mathf.h" 1




typedef struct {
 float r;
 float i;
} cmplxf;

typedef struct {
 double r;
 double i;
} cmplx;








 














 














 
extern double fmod(double, double);
extern double modf(double, double *);

extern double acosh ( double x );
extern int airy ( double x, double *ai, double *aip, double *bi, double *bip );
extern double asin ( double x );
extern double acos ( double x );
extern double asinh ( double xx );
extern double atan ( double x );
extern double atan2 ( double y, double x );
extern double atanh ( double x );
extern double bdtrc ( int k, int n, double p );
extern double bdtr ( int k, int n, double p );
extern double bdtri ( int k, int n, double y );
extern double beta ( double a, double b );
extern double lbeta ( double a, double b );
extern double btdtr ( double a, double b, double x );
extern double cbrt ( double x );
extern double chbevl ( double x, double array[], int n );
extern double chdtrc ( double df, double x );
extern double chdtr ( double df, double x );
extern double chdtri ( double df, double y );
extern void clog ( cmplx *z, cmplx *w );
extern void cexp ( cmplx *z, cmplx *w );
extern void csin ( cmplx *z, cmplx *w );
extern void ccos ( cmplx *z, cmplx *w );
extern void ctan ( cmplx *z, cmplx *w );
extern void ccot ( cmplx *z, cmplx *w );
extern void casin ( cmplx *z, cmplx *w );
extern void cacos ( cmplx *z, cmplx *w );
extern void catan ( cmplx *z, cmplx *w );
extern void csinh ( cmplx *z, cmplx *w );
extern void casinh ( cmplx *z, cmplx *w );
extern void ccosh ( cmplx *z, cmplx *w );
extern void cacosh ( cmplx *z, cmplx *w );
extern void ctanh ( cmplx *z, cmplx *w );
extern void catanh ( cmplx *z, cmplx *w );
extern void cpow ( cmplx *a, cmplx *z, cmplx *w );
extern void cadd ( cmplx *a, cmplx *b, cmplx *c );
extern void csub ( cmplx *a, cmplx *b, cmplx *c );
extern void cmul ( cmplx *a, cmplx *b, cmplx *c );
extern void cdiv ( cmplx *a, cmplx *b, cmplx *c );
extern void cmov ( void *a, void *b );
extern void cneg ( cmplx *a );
extern double cabs ( cmplx *z );
extern void csqrt ( cmplx *z, cmplx *w );
extern double hypot ( double x, double y );
extern double cosh ( double x );
extern double dawsn ( double xx );
extern int drand ( double *a );
extern double ei ( double x );
extern double ellie ( double phi, double m );
extern double ellik ( double phi, double m );
extern double ellpe ( double x );
extern int ellpj ( double u, double m, double *sn, double *cn, double *dn, double *ph );
extern double ellpk ( double x );
extern double exp ( double x );
extern double exp10 ( double x );
extern double exp2 ( double x );
extern double expn ( int n, double x );
extern double expx2 ( double x, int sign );
extern double fabs ( double x );
extern double fac ( int i );
extern double fdtrc ( int ia, int ib, double x );
extern double fdtr ( int ia, int ib, double x );
extern double fdtri ( int ia, int ib, double y );
extern int fresnl ( double xxa, double *ssa, double *cca );
extern double gamma ( double x );
extern double lgam ( double x );
extern double gdtr ( double a, double b, double x );
extern double gdtrc ( double a, double b, double x );
extern double hyp2f1 ( double a, double b, double c, double x );
extern double hyperg ( double a, double b, double x );
extern double hyp2f0 ( double a, double b, double x, int type, double *err );
extern double i0 ( double x );
extern double i0e ( double x );
extern double i1 ( double x );
extern double i1e ( double x );
extern double igami ( double, double );
extern double incbet ( double aa, double bb, double xx );
extern double incbi ( double aa, double bb, double yy0 );
extern double igamc ( double a, double x );
extern double igam ( double a, double x );
extern int signbit ( double x );
extern int isnan ( double x );
extern int isfinite ( double x );
extern double iv ( double v, double x );
extern double j0 ( double x );
extern double y0 ( double x );
extern double j1 ( double x );
extern double y1 ( double x );
extern double jn ( int n, double x );
extern double jv ( double n, double x );
extern double k0 ( double x );
extern double k0e ( double x );
extern double k1 ( double x );
extern double k1e ( double x );
extern double kn ( int nn, double x );
extern double smirnov ( int n, double e );
extern double kolmogorov ( double y );
extern double smirnovi ( int n, double p );
extern double kolmogi ( double p );
extern double log ( double x );
extern double log2 ( double x );
extern double log10 ( double x );
extern long lrand ( void );
extern double nbdtrc ( int k, int n, double p );
extern double nbdtr ( int k, int n, double p );
extern double nbdtri ( int k, int n, double p );
extern double ndtr ( double a );
extern double erfc ( double a );
extern double erf ( double x );
extern double ndtri ( double );
extern double pdtrc ( int k, double m );
extern double pdtr ( int k, double m );
extern double pdtri ( int k, double y );
extern double plancki ( double w, double T );
extern double planckc ( double w, double T );
extern double planckd ( double w, double T );
extern double planckw ( double T );
extern double polevl ( double x, double coef[], int N );
extern double p1evl ( double x, double coef[], int N );
extern void polatn ( double num[], double den[], double ans[], int nn );
extern void polsqt ( double pol[], double ans[], int nn );
extern void polsin ( double x[], double y[], int nn );
extern void polcos ( double x[], double y[], int nn );
extern double polylog ( int n, double x );
extern void polini ( int maxdeg );
extern void polprt ( double a[], int na, int d );
extern void polclr ( double *a, int n );
extern void polmov ( double *a, int na, double *b );
extern void polmul ( double a[], int na, double b[], int nb, double c[] );
extern void poladd ( double a[], int na, double b[], int nb, double c[] );
extern void polsub ( double a[], int na, double b[], int nb, double c[] );
extern int poldiv ( double a[], int na, double b[], int nb, double c[] );
extern void polsbt ( double a[], int na, double b[], int nb, double c[] );
extern double poleva ( double a[], int na, double x );
extern double pow ( double x, double y );
extern double powi ( double x, int nn );
extern double psi ( double x );
extern double rgamma ( double x );
extern double round ( double x );
extern int shichi ( double x, double *si, double *ci );
extern int sici ( double x, double *si, double *ci );
extern double sin ( double x );
extern double cos ( double x );
extern double radian ( double d, double m, double s );
extern double sindg ( double x );
extern double cosdg ( double x );
extern double sinh ( double x );
extern double spence ( double x );
extern double stdtr ( int k, double t );
extern double stdtri ( int k, double p );
extern double onef2 ( double a, double b, double c, double x, double *err );
extern double threef0 ( double a, double b, double c, double x, double *err );
extern double struve ( double v, double x );
extern double yv ( double v, double x );
extern double tan ( double x );
extern double cot ( double x );
extern double tandg ( double x );
extern double cotdg ( double x );
extern double tanh ( double x );
extern double log1p ( double x );
extern double expm1 ( double x );
extern double cosm1 ( double x );
extern double yn ( int n, double x );
extern double zeta ( double x, double q );
extern double zetac ( double x );
extern double sqrt ( double x );
extern double ceil ( double x );
extern double floor ( double x );
extern double frexp ( double x, int *pw2 );
extern double ldexp ( double x, int pw2 );
extern int sprec ( void );
extern int dprec ( void );
extern int ldprec ( void );
extern int mtherr ( char *name, int code );

 
extern float acosf ( float x );
extern float acoshf ( float xx );
extern int airyf ( float xx, float *ai, float *aip, float *bi, float *bip );
extern float asinf ( float xx );
extern float asinhf ( float xx );
extern float atan2f ( float y, float x );
extern float atanf ( float xx );
extern float atanhf ( float xx );
extern float bdtrcf ( int k, int n, float pp );
extern float bdtrf ( int k, int n, float pp );
extern float bdtrif ( int k, int n, float yy );
extern float betaf ( float aa, float bb );
extern float cabsf ( cmplxf *z );
extern void cacosf ( cmplxf *z, cmplxf *w );
extern void caddf ( cmplxf *a, cmplxf *b, cmplxf *c );
extern void casinf ( cmplxf *z, cmplxf *w );
extern void catanf ( cmplxf *z, cmplxf *w );
extern float cbrtf ( float xx );
extern void cchshf ( float xx, float *c, float *s );
extern void ccosf ( cmplxf *z, cmplxf *w );
extern void ccotf ( cmplxf *z, cmplxf *w );
extern void cdivf ( cmplxf *a, cmplxf *b, cmplxf *c );
extern float ceilf ( float x );
extern void cexpf ( cmplxf *z, cmplxf *w );
extern float chbevlf ( float x, float *array, int n );
extern float chdtrcf ( float dff, float xx );
extern float chdtrf ( float dff, float xx );
extern float chdtrif ( float dff, float yy );
extern void clogf ( cmplxf *z, cmplxf *w );
extern void cmovf ( short *a, short *b );
extern void cmulf ( cmplxf *a, cmplxf *b, cmplxf *c );
extern void cnegf ( cmplxf *a );
extern float cosdgf ( float xx );
extern float cosf ( float xx );
extern float coshf ( float xx );
extern float cotdgf ( float x );
extern float cotf ( float x );
extern void csinf ( cmplxf *z, cmplxf *w );
extern void csqrtf ( cmplxf *z, cmplxf *w );
extern void csubf ( cmplxf *a, cmplxf *b, cmplxf *c );
extern void ctanf ( cmplxf *z, cmplxf *w );
extern float ctansf ( cmplxf *z );
extern float dawsnf ( float xxx );
extern int dprec ( void );
extern float ellief ( float phia, float ma );
extern float ellikf ( float phia, float ma );
extern float ellpef ( float xx );
extern int ellpjf ( float uu, float mm, float *sn, float *cn, float *dn, float *ph );
extern float ellpkf ( float xx );
extern float erfcf ( float aa );
extern float erff ( float xx );
extern float exp10f ( float xx );
extern float exp2f ( float xx );
extern float expf ( float xx );
extern float expnf ( int n, float xx );
extern float facf ( int i );
extern float fdtrcf ( int ia, int ib, float xx );
extern float fdtrf ( int ia, int ib, int xx );
extern float fdtrif ( int ia, int ib, float yy );
extern float floorf ( float x );
extern void fresnlf ( float xxa, float *ssa, float *cca );
extern float frexpf ( float x, int *pw2 );
extern float gammaf ( float xx );
extern float gdtrcf ( float aa, float bb, float xx );
extern float gdtrf ( float aa, float bb, float xx );
extern float hyp2f0f ( float aa, float bb, float xx, int type, float *err );
extern float hyp2f1f ( float aa, float bb, float cc, float xx );
extern float hypergf ( float aa, float bb, float xx );
extern float i0ef ( float x );
extern float i0f ( float x );
extern float i1ef ( float xx );
extern float i1f ( float xx );
extern float igamcf ( float aa, float xx );
extern float igamf ( float aa, float xx );
extern float igamif ( float aa, float yy0 );
extern float incbetf ( float aaa, float bbb, float xxx );
extern float incbif ( float aaa, float bbb, float yyy0 );
extern float incbpsf ( float aa, float bb, float xx );
extern float ivf ( float v, float x );
extern float j0f ( float xx );
extern float j1f ( float xx );
extern float jnf ( int n, float xx );
extern float jvf ( float nn, float xx );
extern float k0ef ( float xx );
extern float k0f ( float xx );
extern float k1ef ( float xx );
extern float k1f ( float xx );
extern float knf ( int nnn, float xx );
extern float ldexpf ( float x, int pw2 );
extern int ldprec ( void );
extern float lgamf ( float xx );
extern float log10f ( float xx );