/*  Copyright (C) 1996  Byron Stanoszek
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 **************************************************************************/

/* sound.h */


#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <termio.h>
#include <stdio.h>
#include <fcntl.h>
#include <signal.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/errno.h>
#include <sys/soundcard.h>
#include <math.h>
#include "pcm.h"


/* header for WAV-Files */
typedef struct {
  char main_chunk[4];	/* 'RIFF' */
  long length;		/* length of file */
  char chunk_type[4];	/* 'WAVE' */
  char sub_chunk[4];	/* 'fmt ' */
  long length_chunk;	/* length sub_chunk, always 16 bytes */
  short format;		/* always 1 = PCM-Code */
  short modus;		/* 1 = Mono, 2 = Stereo */
  long sample_fq;	/* Sample Freq */
  long byte_p_sec;	/* Data per sec */
  short byte_p_spl;	/* bytes per sample:
					1=8 bit, 2=16 bit (mono)
					2=8 bit, 4=16 bit (stereo) */
  short bit_p_spl;	/* bits per sample, 8, 12, 16 */
  char data_chunk[4];	/* 'data' */
  long data_length;	/* length of data */
} wave_header;

typedef struct {
  char main_chunk[3];	/* 'PCM' */
  char version;		/* 1 */
  char modus;		/* 1 = Mono, 2 = Stereo, 4 = Quad */
  char byte_p_spl;	/* bytes per sample:
					1=8 bit, 2=16 bit (mono)
					2=8 bit, 4=16 bit (stereo) */
  long sample_fq;	/* Sample Freq */
  long byte_p_sec;	/* Data per sec */
} pcm_header;

typedef struct song_chain_struct song_chain;
struct song_chain_struct {
  song_chain *next;

  int tune;		/* tune number */
  int c;		/* play counter */
  int fd;		/* file descriptor */
  double count;		/* time counter */
  char title[32];	/* title of song, 30 chars max */

  int stereo;		/* 0 = Mono, 1 = Stereo */
  int speed;		/* Data per sec */
  int sample_size;	/* bits per sample */
  int bytesize;		/* bytes per sample (1, 2, or 4) */
  int headsize;		/* size of header in file */
  int length;		/* length of file */
  int repeat;		/* location of file which repeats */
  int bartime;		/* notes per time segment */
  int barlength;	/* samples per note */

  int default_speed;	/* default speed of tune */
  int repeat_mode;	/* 0 = Single, 1 = Repeat, 2 = Full, 3 = Middle */
  int repeat_num;	/* how many times still to repeat */
  int fpause;		/* halt data codes until song finishes playing */
  int scale;		/* final scale speed */

  int volume;		/* current volume */
  int volspeed;		/* speed of volume scaling */
  int volume_scale;	/* final volume scale speed */
  int scale_toggle;	/* 0 = do not scale volume changes, 1 = scale */
};

/* global declarations */
int atoi();
int read();
int ioctl();
void *malloc();
void free();
int write();
void read_song();
void set_audio();
int unlink();
void read_input();
void send_data();
int fork();
int setpgrp();
int speed_to_scale();
void fix_tty();
char *getenv();
void input_volume();
int select();
void update_display();
void set_status();
int strncmp();
int strncpy();
unsigned int soundbar();
void process_music();
void output_sound();