mirror of
https://github.com/mpv-player/mpv
synced 2024-12-12 01:46:16 +00:00
7b0c242d34
Author unknown, code from a public domain player for Amiga at http://www.honeypot.net/audio git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10261 b3059339-0415-0410-9bf9-f77b7e298cf2
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
#ifndef DECODE144_H
|
|
#define DECODE144_H
|
|
|
|
/* internal globals */
|
|
typedef struct {
|
|
unsigned int resetflag, val, oldval;
|
|
unsigned int unpacked[28]; /* buffer for unpacked input */
|
|
unsigned int *iptr; /* pointer to current input (from unpacked) */
|
|
unsigned int gval;
|
|
unsigned short *gsp;
|
|
unsigned int gbuf1[8];
|
|
unsigned short gbuf2[120];
|
|
signed short output_buffer[40];
|
|
unsigned int *decptr; /* decoder ptr */
|
|
signed short *decsp;
|
|
|
|
/* the swapped buffers */
|
|
unsigned int swapb1a[10];
|
|
unsigned int swapb2a[10];
|
|
unsigned int swapb1b[10];
|
|
unsigned int swapb2b[10];
|
|
unsigned int *swapbuf1;
|
|
unsigned int *swapbuf2;
|
|
unsigned int *swapbuf1alt;
|
|
unsigned int *swapbuf2alt;
|
|
|
|
unsigned int buffer[5];
|
|
unsigned short int buffer_2[148];
|
|
unsigned short int buffer_a[40];
|
|
unsigned short int buffer_b[40];
|
|
unsigned short int buffer_c[40];
|
|
unsigned short int buffer_d[40];
|
|
|
|
unsigned short int work[50];
|
|
unsigned short *sptr;
|
|
|
|
int buffer1[10];
|
|
int buffer2[10];
|
|
|
|
signed short wavtable1[2304];
|
|
unsigned short wavtable2[2304];
|
|
} Real_internal;
|
|
|
|
/* consts */
|
|
#define NBLOCKS 4 /* number of segments within a block */
|
|
#define BLOCKSIZE 40 /* (quarter) block size in 16-bit words (80 bytes) */
|
|
#define HALFBLOCK 20 /* BLOCKSIZE/2 */
|
|
#define BUFFERSIZE 146 /* for do_output */
|
|
|
|
/* prototypes */
|
|
static int t_sqrt (unsigned int x);
|
|
static void do_voice (int *a1, int *a2);
|
|
static void do_output_subblock (Real_internal *glob, int x);
|
|
static void rotate_block (short *source, short *target, int offset);
|
|
static int irms (short *data, int factor);
|
|
static void add_wav (Real_internal *glob, int n, int f, int m1, int m2, int m3, short *s1, short *s2, short *s3, short *dest);
|
|
static void final (Real_internal *glob, short *i1, short *i2, void *out, int *statbuf, int len);
|
|
static void unpack_input (unsigned char *input, unsigned int *output);
|
|
static unsigned int rms (int *data, int f);
|
|
static void dec1 (Real_internal *glob, int *data, int *inp, int n, int f);
|
|
static void dec2 (Real_internal *glob, int *data, int *inp, int n, int f, int *inp2, int l);
|
|
static int eq (Real_internal *glob, short *in, int *target);
|
|
|
|
#endif /* !DECODE144_H */
|