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/* pminternal.h -- header for interface implementations */
/* this file is included by files that implement library internals */
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/types.h>
/* these are defined in system-specific file */
void *pm_alloc(size_t s);
void pm_free(void *ptr);
struct pm_internal_struct;
/* these do not use PmInternal because it is not defined yet... */
typedef PmError (*pm_write_fn)(struct pm_internal_struct *midi,
PmEvent *buffer, long length);
typedef PmError (*pm_open_fn)(struct pm_internal_struct *midi,
void *driverInfo);
typedef PmError (*pm_abort_fn)(struct pm_internal_struct *midi);
typedef PmError (*pm_close_fn)(struct pm_internal_struct *midi);
typedef struct {
pm_write_fn write;
pm_open_fn open;
pm_abort_fn abort;
pm_close_fn close;
} pm_fns_node, *pm_fns_type;
/* when open fails, the dictionary gets this set of functions: */
extern pm_fns_node pm_none_dictionary;
typedef struct {
PmDeviceInfo pub;
void *descriptor; /* system-specific data to open device */
pm_fns_type dictionary;
} descriptor_node, *descriptor_type;
#define pm_descriptor_max 32
extern descriptor_node descriptors[pm_descriptor_max];
extern int descriptor_index;
typedef unsigned long (*time_get_proc_type)(void *time_info);
typedef struct pm_internal_struct {
short write_flag; /* MIDI_IN, or MIDI_OUT */
int device_id; /* which device is open (index to descriptors) */
PmTimeProcPtr time_proc; /* where to get the time */
void *time_info; /* pass this to get_time() */
PmEvent *buffer; /* input or output buffer */
long buffer_len; /* how big is the buffer */
long latency; /* time delay in ms between timestamps and actual output */
/* set to zero to get immediate, simple blocking output */
/* if latency is zero, timestamps will be ignored */
int overflow; /* set to non-zero if input is dropped */
int flush; /* flag to drop incoming sysex data because of overflow */
int sysex_in_progress; /* use for overflow management */
struct pm_internal_struct *thru;
PmTimestamp last_msg_time; /* timestamp of last message */
long head;
long tail;
pm_fns_type dictionary; /* implementation functions */
void *descriptor; /* system-dependent state */
} PmInternal;
typedef struct {
long head;
long tail;
long len;
long msg_size;
long overflow;
char *buffer;
} PmQueueRep;
PmError pm_init(void); /* defined in a system-specific file */
PmError pm_term(void); /* defined in a system-specific file */
int pm_in_device(int n, char *interf, char *device);
int pm_out_device(int n, char *interf, char *device);
PmError none_write(PmInternal *midi, PmEvent *buffer, long length);
PmError pm_success_fn(PmInternal *midi);
PmError pm_fail_fn(PmInternal *midi);
long pm_in_poll(PmInternal *midi);
long pm_out_poll(PmInternal *midi);
PmError pm_add_device(char *interf, char *name, int input, void *descriptor,
pm_fns_type dictionary);
void pm_enqueue(PmInternal *midi, PmEvent *event);
#ifdef __cplusplus
}
#endif
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