/* Copyright (c) 1997-1999 Miller Puckette.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */

/* Audio and MIDI I/O, and other scheduling and system stuff. */

/* NOTE: this file describes Pd implementation details which may change
in future releases.  The public (stable) API is in m_pd.h. */  

/* in s_file.c */
typedef struct _namelist
{
    struct _namelist *nl_next;
    char *nl_string;
} t_namelist;

t_namelist *namelist_append(t_namelist *listwas, const char *s);
void namelist_free(t_namelist *listwas);

/* s_main.c */
extern int sys_debuglevel;
extern int sys_verbose;
extern int sys_noloadbang;
extern int sys_nogui;
extern char *sys_guicmd;

EXTERN int sys_nearestfontsize(int fontsize);
EXTERN int sys_hostfontsize(int fontsize);

extern int sys_defaultfont;
extern t_symbol *sys_libdir;	/* library directory for auxilliary files */

/* s_loader.c */
int sys_load_lib(char *dirname, char *filename);

/* s_audio.c */

#define SENDDACS_NO 0	    	/* return values for sys_send_dacs() */
#define SENDDACS_YES 1 
#define SENDDACS_SLEPT 2

#define DEFDACBLKSIZE 64
extern int sys_schedblocksize;	/* audio block size for scheduler */
extern int sys_hipriority;   	/* real-time flag, true if priority boosted */
extern t_sample *sys_soundout;
extern t_sample *sys_soundin;
extern int sys_inchannels;
extern int sys_outchannels;
extern int sys_advance_samples; /* scheduler advance in samples */
extern int sys_blocksize;   	/* audio I/O block size in sample frames */
extern float sys_dacsr;
extern int sys_schedadvance;
extern int sys_sleepgrain;
void sys_open_audio(int naudioindev, int *audioindev,
    int nchindev, int *chindev,
    int naudiooutdev, int *audiooutdev, int nchoutdev, int *choutdev,
    int srate); /* IOhannes */
void sys_close_audio(void);

void sys_open_midi(int nmidiin, int *midiinvec,
    int nmidiout, int *midioutvec);
void sys_close_midi(void);

int sys_send_dacs(void);
void sys_reportidle(void);
void sys_set_priority(int higher);
void sys_audiobuf(int nbufs);
void sys_getmeters(float *inmax, float *outmax);
void sys_listdevs(void);
void sys_setblocksize(int n);

/* s_midi.c */
#define MAXMIDIINDEV 16    	/* max. number of input ports */
#define MAXMIDIOUTDEV 16    	/* max. number of output ports */
extern int sys_nmidiin;
extern int sys_nmidiout;
extern int sys_midiindevlist[];
extern int sys_midioutdevlist[];

EXTERN void sys_putmidimess(int portno, int a, int b, int c);
EXTERN void sys_putmidibyte(int portno, int a);
EXTERN void sys_poll_midi(void);
EXTERN void sys_setmiditimediff(double inbuftime, double outbuftime);
EXTERN void sys_midibytein(int portno, int byte);

/* m_sched.c */
EXTERN void sys_log_error(int type);
#define ERR_NOTHING 0
#define ERR_ADCSLEPT 1
#define ERR_DACSLEPT 2
#define ERR_RESYNC 3
#define ERR_DATALATE 4

/* s_inter.c */

EXTERN void sys_microsleep(int microsec);

EXTERN void sys_bail(int exitcode);
EXTERN int sys_pollgui(void);

EXTERN_STRUCT _socketreceiver;
#define t_socketreceiver struct _socketreceiver

typedef void (*t_socketnotifier)(void *x);
typedef void (*t_socketreceivefn)(void *x, t_binbuf *b);

EXTERN t_socketreceiver *socketreceiver_new(void *owner,
    t_socketnotifier notifier, t_socketreceivefn socketreceivefn, int udp);
EXTERN void socketreceiver_read(t_socketreceiver *x, int fd);
EXTERN void sys_sockerror(char *s);
EXTERN void sys_closesocket(int fd);

typedef void (*t_fdpollfn)(void *ptr, int fd);
EXTERN void sys_addpollfn(int fd, t_fdpollfn fn, void *ptr);
EXTERN void sys_rmpollfn(int fd);
#ifdef UNIX
void sys_setalarm(int microsec);
void sys_setvirtualalarm( void);
#endif

#define API_ALSA 1
#define API_OSS 2
#define API_MMIO 3
#define API_PORTAUDIO 4

#ifdef __linux__
#define API_DEFAULT API_OSS
#define API_DEFSTRING "OSS"
#endif
#ifdef MSW
#define API_DEFAULT API_MMIO
#define API_DEFSTRING "MMIO"
#endif
#ifdef MACOSX
#define API_DEFAULT API_PORTAUDIO
#define API_DEFSTRING "portaudio"
#endif
#define DEFAULTAUDIODEV -1

#define DEFMIDIDEV -1

int pa_open_audio(int inchans, int outchans, int rate, t_sample *soundin,
    t_sample *soundout, int framesperbuf, int nbuffers,
    int indeviceno, int outdeviceno);
void pa_close_audio(void);
int pa_send_dacs(void);
void sys_reportidle(void);
void pa_listdevs(void);

int oss_open_audio(int naudioindev, int *audioindev, int nchindev,
    int *chindev, int naudiooutdev, int *audiooutdev, int nchoutdev,
    int *choutdev, int rate); /* IOhannes */
void oss_close_audio(void);
int oss_send_dacs(void);
void oss_reportidle(void);
void oss_listdevs(void);

int alsa_open_audio(int wantinchans, int wantoutchans, int srate);
void alsa_close_audio(void);
int alsa_send_dacs(void);
void alsa_reportidle(void);
void alsa_listdevs(void);

void mmio_open_audio(int naudioindev, int *audioindev,
    int nchindev, int *chindev, int naudiooutdev, int *audiooutdev,
    int nchoutdev, int *choutdev, int rate);
void mmio_close_audio( void);
void mmio_reportidle(void);
int mmio_send_dacs(void);
void mmio_listdevs(void);

void sys_listmididevs(void);
void sys_set_sound_api(int whichapi);
extern int sys_audioapi;

/* API dependent audio flags and settings */
void oss_set32bit( void);
void linux_alsa_devname(char *devname);