360 lines
10 KiB
C
360 lines
10 KiB
C
/*
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mpg123: main code of the program (not of the decoder...)
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copyright 1995-2006 by the mpg123 project - free software under the terms of the LGPL 2.1
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see COPYING and AUTHORS files in distribution or http://mpg123.de
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initially written by Michael Hipp
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mpg123 defines
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used source: musicout.h from mpegaudio package
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdio.h>
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#include <math.h>
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#ifndef _AUDIO_H_
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#define _AUDIO_H_
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typedef unsigned char byte;
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#define off_t long
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//#define I486_OPT 1
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#define SKIP_JUNK 1
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# define M_PI 3.14159265358979323846
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# define M_SQRT2 1.41421356237309504880
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# define REAL_IS_FLOAT
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# define NEW_DCT9
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#ifdef REAL_IS_FLOAT
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# define real float
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# define REAL_SCANF "%f"
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# define REAL_PRINTF "%f"
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#else
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# define real double
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# define REAL_SCANF "%lf"
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# define REAL_PRINTF "%f"
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#endif
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#ifndef DOUBLE_TO_REAL
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# define DOUBLE_TO_REAL(x) (x)
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#endif
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#ifndef REAL_TO_SHORT
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# define REAL_TO_SHORT(x) (x)
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#endif
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#ifndef REAL_PLUS_32767
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# define REAL_PLUS_32767 32767.0
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#endif
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#ifndef REAL_MINUS_32768
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# define REAL_MINUS_32768 -32768.0
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#endif
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#ifndef REAL_MUL
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# define REAL_MUL(x, y) ((x) * (y))
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#endif
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#define INLINE
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/* AUDIOBUFSIZE = n*64 with n=1,2,3 ... */
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#define AUDIOBUFSIZE 16384
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#define FALSE 0
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#define TRUE 1
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#define MAX_NAME_SIZE 81
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#define SBLIMIT 32
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#define SCALE_BLOCK 12
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#define SSLIMIT 18
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#define MPG_MD_STEREO 0
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#define MPG_MD_JOINT_STEREO 1
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#define MPG_MD_DUAL_CHANNEL 2
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#define MPG_MD_MONO 3
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/* I suspect that 32767 would be a better idea here, but Michael put this in... */
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#define MAXOUTBURST 32768
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/* Pre Shift fo 16 to 8 bit converter table */
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#define AUSHIFT (3)
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struct bitstream_info
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{ int bitindex;
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unsigned char *wordpointer;
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};
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extern struct bitstream_info bsi;
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struct reader
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{ char *hFile;
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unsigned char *buffer;
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unsigned char *stream;
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int strpos;
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int strremain;
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int filelen;
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int filepos;
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int (*head_read)(struct reader *,unsigned long *newhead);
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int (*read_frame_body)(struct reader *,unsigned char *,int size);
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};
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struct al_table
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{ short bits;
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short d;
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};
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struct frame {
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struct al_table *alloc;
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int (*synth)(real *,int,unsigned char *,int *);
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int (*synth_mono)(real *,unsigned char *,int *);
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int stereo; /* I _think_ 1 for mono and 2 for stereo */
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int jsbound;
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int single;
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int II_sblimit;
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int down_sample_sblimit;
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int lsf; /* 0: MPEG 1.0; 1: MPEG 2.0/2.5 -- both used as bool and array index! */
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int mpeg25;
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int down_sample;
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int header_change;
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int lay;
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int (*do_layer)(struct frame *fr,byte *pcm_out, int *pcm_size);
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int error_protection;
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int bitrate_index;
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int sampling_frequency;
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int padding;
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int extension;
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int mode;
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int mode_ext;
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int copyright;
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int original;
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int emphasis;
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int framesize; /* computed framesize */
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int vbr; /* 1 if variable bitrate was detected */
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unsigned long num; /* the nth frame in some stream... */
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};
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#if 0
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struct parameter {
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int aggressive; /* renice to max. priority */
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int shuffle; /* shuffle/random play */
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int remote; /* remote operation */
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int remote_err; /* remote operation to stderr */
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int outmode; /* where to out the decoded sampels */
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int quiet; /* shut up! */
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int xterm_title; /* Change xterm title to song names? */
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long usebuffer; /* second level buffer size */
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int tryresync; /* resync stream after error */
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int verbose; /* verbose level */
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int force_mono;
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int force_stereo;
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int force_8bit;
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long force_rate;
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int down_sample;
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int checkrange;
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long doublespeed;
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long halfspeed;
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int force_reopen;
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long realtime;
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char filename[256];
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long listentry; /* possibility to choose playback of one entry in playlist (0: off, > 0 : select, < 0; just show list*/
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int rva; /* (which) rva to do: <0: nothing, 0: radio/mix/track 1: album/audiophile */
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char* listname; /* name of playlist */
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int long_id3;
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};
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#endif
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#if 0
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struct reader {
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int (*init)(struct reader *);
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void (*close)(struct reader *);
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int (*head_read)(struct reader *,unsigned long *newhead);
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int (*head_shift)(struct reader *,unsigned long *head);
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long (*skip_bytes)(struct reader *,off_t len);
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int (*read_frame_body)(struct reader *,unsigned char *,int size);
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int (*back_bytes)(struct reader *,off_t bytes);
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int (*back_frame)(struct reader *,struct frame *,long num);
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off_t (*tell)(struct reader *);
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void (*rewind)(struct reader *);
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off_t filelen;
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off_t filepos;
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int filept;
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int flags;
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unsigned char id3buf[128];
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};
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#endif
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#define READER_FD_OPENED 0x1
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#define READER_ID3TAG 0x2
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#define READER_SEEKABLE 0x4
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//extern void audio_flush(int, struct audio_info_struct *);
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//extern void print_header(struct frame *);
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//extern void print_header_compact(struct frame *);
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//extern void print_id3_tag(unsigned char *buf);
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//extern int split_dir_file(const char *path, char **dname, char **fname);
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extern unsigned int get1bit(void);
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extern unsigned int getbits(int);
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extern unsigned int getbits_fast(int);
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//extern void backbits(int);
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//extern int getbitoffset(void);
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//extern int getbyte(void);
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//extern void set_pointer(long);
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//extern unsigned char *pcm_sample;
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//extern int pcm_point;
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//extern int audiobufsize;
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//extern int OutputDescriptor;
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#ifdef VARMODESUPPORT
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extern int varmode;
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extern int playlimit;
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#endif
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struct gr_info_s {
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int scfsi;
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unsigned part2_3_length;
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unsigned big_values;
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unsigned scalefac_compress;
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unsigned block_type;
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unsigned mixed_block_flag;
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unsigned table_select[3];
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unsigned subblock_gain[3];
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unsigned maxband[3];
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unsigned maxbandl;
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unsigned maxb;
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unsigned region1start;
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unsigned region2start;
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unsigned preflag;
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unsigned scalefac_scale;
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unsigned count1table_select;
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real *full_gain[3];
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real *pow2gain;
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};
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struct III_sideinfo
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{
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unsigned main_data_begin;
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unsigned private_bits;
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struct {
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struct gr_info_s gr[2];
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} ch[2];
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};
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extern int open_stream(char *,int fd);
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extern void read_frame_init (struct frame* fr);
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int read_frame(struct reader *rd, struct frame *fr);
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/* why extern? */
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void prepare_audioinfo(struct frame *fr, struct audio_info_struct *nai);
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int play_frame(int init,struct frame *fr);
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int do_layer1(struct frame *fr,byte *pcm_sample, int *pcm_point);
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int do_layer2(struct frame *fr,byte *pcm_sample, int *pcm_point);
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int do_layer3(struct frame *fr,byte *pcm_sample, int *pcm_point);
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extern void do_equalizer(real *bandPtr,int channel);
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#ifdef PENTIUM_OPT
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extern int synth_1to1_pent (real *,int,unsigned char *);
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#endif
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extern int synth_1to1 (real *,int,unsigned char *,int *);
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extern int synth_1to1_8bit (real *,int,unsigned char *,int *);
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extern int synth_1to1_mono (real *,unsigned char *,int *);
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extern int synth_1to1_mono2stereo (real *,unsigned char *,int *);
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extern int synth_1to1_8bit_mono (real *,unsigned char *,int *);
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extern int synth_1to1_8bit_mono2stereo (real *,unsigned char *,int *);
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extern int synth_2to1 (real *,int,unsigned char *,int *);
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extern int synth_2to1_8bit (real *,int,unsigned char *,int *);
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extern int synth_2to1_mono (real *,unsigned char *,int *);
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extern int synth_2to1_mono2stereo (real *,unsigned char *,int *);
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extern int synth_2to1_8bit_mono (real *,unsigned char *,int *);
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extern int synth_2to1_8bit_mono2stereo (real *,unsigned char *,int *);
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extern int synth_4to1 (real *,int,unsigned char *,int *);
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extern int synth_4to1_8bit (real *,int,unsigned char *,int *);
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extern int synth_4to1_mono (real *,unsigned char *,int *);
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extern int synth_4to1_mono2stereo (real *,unsigned char *,int *);
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extern int synth_4to1_8bit_mono (real *,unsigned char *,int *);
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extern int synth_4to1_8bit_mono2stereo (real *,unsigned char *,int *);
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extern int synth_ntom (real *,int,unsigned char *,int *);
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extern int synth_ntom_8bit (real *,int,unsigned char *,int *);
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extern int synth_ntom_mono (real *,unsigned char *,int *);
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extern int synth_ntom_mono2stereo (real *,unsigned char *,int *);
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extern int synth_ntom_8bit_mono (real *,unsigned char *,int *);
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extern int synth_ntom_8bit_mono2stereo (real *,unsigned char *,int *);
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extern void rewindNbits(int bits);
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extern int hsstell(void);
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extern void set_pointer(long);
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extern void huffman_decoder(int ,int *);
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extern void huffman_count1(int,int *);
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extern void print_stat(struct frame *fr,unsigned long no,long buffsize,struct audio_info_struct *ai);
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extern int get_songlen(struct frame *fr,int no);
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extern void init_layer3(int);
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extern void init_layer2(void);
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extern void make_decode_tables(long scale);
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extern int make_conv16to8_table(int);
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extern void dct64(real *,real *,real *);
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#ifdef USE_MMX
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extern void dct64_MMX(short *a,short *b,real *c);
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extern int synth_1to1_MMX(real *, int, short *, short *, int *);
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#endif
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extern int synth_ntom_set_step(long,long);
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extern unsigned char *conv16to8;
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extern long freqs[9];
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extern real muls[27][64];
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extern real decwin[512+32];
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#ifndef USE_MMX
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extern real *pnts[5];
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#endif
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extern real equalizer[2][32];
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extern real equalizer_sum[2][32];
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extern int equalizer_cnt;
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extern struct audio_name audio_val2name[];
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//extern struct parameter param;
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/* 486 optimizations */
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#define FIR_BUFFER_SIZE 128
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extern void dct64_486(int *a,int *b,real *c);
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extern int synth_1to1_486(real *bandPtr,int channel,unsigned char *out,int nb_blocks);
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/* 3DNow! optimizations */
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#ifdef USE_3DNOW
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extern int getcpuflags(void);
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extern void dct36(real *,real *,real *,real *,real *);
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extern void dct36_3dnow(real *,real *,real *,real *,real *);
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extern int synth_1to1_3dnow(real *,int,unsigned char *,int *);
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#endif
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/* avoid the SIGINT in terminal control */
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void next_track(void);
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extern long outscale;
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#endif
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void set_pointer(long backstep);
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int __stdcall create_reader(struct reader *rd,byte *buffer, int buffsize);
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int __stdcall init_reader(struct reader *rd, char *file);
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int __stdcall decode_header(struct frame *fr,unsigned long newhead);
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int __stdcall set_reader(struct reader *rd, unsigned int filepos);
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double pow_test(double, double);
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void * __cdecl mem_cpy(void * dst,const void * src,size_t count);
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void init_dct();
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void reset_mpg();
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#ifdef __cplusplus
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}
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#endif
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