mirror of
https://github.com/mpv-player/mpv
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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
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#define DECODE144_H
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/* internal globals */
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typedef struct {
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unsigned int resetflag, val, oldval;
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unsigned int unpacked[28]; /* buffer for unpacked input */
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unsigned int *iptr; /* pointer to current input (from unpacked) */
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unsigned int gval;
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unsigned short *gsp;
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unsigned int gbuf1[8];
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unsigned short gbuf2[120];
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signed short output_buffer[40];
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unsigned int *decptr; /* decoder ptr */
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signed short *decsp;
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/* the swapped buffers */
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unsigned int swapb1a[10];
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unsigned int swapb2a[10];
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unsigned int swapb1b[10];
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unsigned int swapb2b[10];
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unsigned int *swapbuf1;
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unsigned int *swapbuf2;
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unsigned int *swapbuf1alt;
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unsigned int *swapbuf2alt;
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unsigned int buffer[5];
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unsigned short int buffer_2[148];
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unsigned short int buffer_a[40];
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unsigned short int buffer_b[40];
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unsigned short int buffer_c[40];
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unsigned short int buffer_d[40];
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unsigned short int work[50];
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unsigned short *sptr;
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int buffer1[10];
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int buffer2[10];
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signed short wavtable1[2304];
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unsigned short wavtable2[2304];
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} Real_internal;
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/* consts */
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#define NBLOCKS 4 /* number of segments within a block */
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#define BLOCKSIZE 40 /* (quarter) block size in 16-bit words (80 bytes) */
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#define HALFBLOCK 20 /* BLOCKSIZE/2 */
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#define BUFFERSIZE 146 /* for do_output */
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/* prototypes */
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static int t_sqrt (unsigned int x);
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static void do_voice (int *a1, int *a2);
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static void do_output_subblock (Real_internal *glob, int x);
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static void rotate_block (short *source, short *target, int offset);
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static int irms (short *data, int factor);
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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);
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static void final (Real_internal *glob, short *i1, short *i2, void *out, int *statbuf, int len);
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static void unpack_input (unsigned char *input, unsigned int *output);
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static unsigned int rms (int *data, int f);
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static void dec1 (Real_internal *glob, int *data, int *inp, int n, int f);
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static void dec2 (Real_internal *glob, int *data, int *inp, int n, int f, int *inp2, int l);
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static int eq (Real_internal *glob, short *in, int *target);
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#endif /* !DECODE144_H */
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