142 lines
3.4 KiB
C
142 lines
3.4 KiB
C
|
/*******************************************************************************
|
||
|
/
|
||
|
/ File: TimeSource.h
|
||
|
/
|
||
|
/ Description: A BTimeSource is something to which others can slave timing information
|
||
|
/ using the Media Kit.
|
||
|
/
|
||
|
/ Copyright 1997-98, Be Incorporated, All Rights Reserved
|
||
|
/
|
||
|
*******************************************************************************/
|
||
|
|
||
|
#if !defined(_TIME_SOURCE_H)
|
||
|
#define _TIME_SOURCE_H
|
||
|
|
||
|
#include <MediaDefs.h>
|
||
|
#include <MediaNode.h>
|
||
|
|
||
|
|
||
|
class _BSlaveNodeStorageP;
|
||
|
struct _time_transmit_buf;
|
||
|
|
||
|
|
||
|
class BTimeSource :
|
||
|
public virtual BMediaNode
|
||
|
{
|
||
|
protected:
|
||
|
/* this has to be at the top to force a vtable */
|
||
|
virtual ~BTimeSource();
|
||
|
|
||
|
public:
|
||
|
|
||
|
virtual status_t SnoozeUntil( /* returns error if stopped */
|
||
|
bigtime_t performance_time,
|
||
|
bigtime_t with_latency = 0,
|
||
|
bool retry_signals = false);
|
||
|
|
||
|
bigtime_t Now(); /* convenience, less accurate */
|
||
|
bigtime_t PerformanceTimeFor( /* all three go through GetTime() */
|
||
|
bigtime_t real_time);
|
||
|
bigtime_t RealTimeFor(
|
||
|
bigtime_t performance_time,
|
||
|
bigtime_t with_latency);
|
||
|
bool IsRunning();
|
||
|
|
||
|
status_t GetTime( /* return B_OK if reading is usable */
|
||
|
bigtime_t * performance_time,
|
||
|
bigtime_t * real_time,
|
||
|
float * drift);
|
||
|
|
||
|
static bigtime_t RealTime(); /* this produces real time, nothing else is guaranteed to */
|
||
|
|
||
|
status_t GetStartLatency(
|
||
|
bigtime_t * out_latency);
|
||
|
|
||
|
protected:
|
||
|
|
||
|
BTimeSource();
|
||
|
|
||
|
virtual status_t HandleMessage(
|
||
|
int32 message,
|
||
|
const void * data,
|
||
|
size_t size);
|
||
|
|
||
|
void PublishTime( /* call this at convenient times to update approximation */
|
||
|
bigtime_t performance_time,
|
||
|
bigtime_t real_time,
|
||
|
float drift);
|
||
|
|
||
|
void BroadcastTimeWarp(
|
||
|
bigtime_t at_real_time,
|
||
|
bigtime_t new_performance_time); /* when running */
|
||
|
void SendRunMode(
|
||
|
run_mode mode);
|
||
|
|
||
|
virtual void SetRunMode(
|
||
|
run_mode mode); /* or, instead, SendRunMode() */
|
||
|
|
||
|
enum time_source_op {
|
||
|
B_TIMESOURCE_START = 1,
|
||
|
B_TIMESOURCE_STOP,
|
||
|
B_TIMESOURCE_STOP_IMMEDIATELY,
|
||
|
B_TIMESOURCE_SEEK
|
||
|
};
|
||
|
struct time_source_op_info {
|
||
|
time_source_op op;
|
||
|
int32 _reserved1;
|
||
|
bigtime_t real_time;
|
||
|
bigtime_t performance_time;
|
||
|
int32 _reserved2[6];
|
||
|
};
|
||
|
virtual status_t TimeSourceOp(
|
||
|
const time_source_op_info & op,
|
||
|
void * _reserved) = 0;
|
||
|
|
||
|
private:
|
||
|
|
||
|
friend class _BMediaRosterP;
|
||
|
friend class _BTimeSourceP;
|
||
|
friend class _SysTimeSource;
|
||
|
friend class BMediaNode;
|
||
|
friend class BMediaRoster;
|
||
|
friend class _ServerApp;
|
||
|
|
||
|
BTimeSource( /* private unimplemented */
|
||
|
const BTimeSource & clone);
|
||
|
BTimeSource & operator=(
|
||
|
const BTimeSource & clone);
|
||
|
|
||
|
/* Mmmh, stuffing! */
|
||
|
status_t _Reserved_TimeSource_0(void *); // TimeSourceOp()
|
||
|
virtual status_t _Reserved_TimeSource_1(void *);
|
||
|
virtual status_t _Reserved_TimeSource_2(void *);
|
||
|
virtual status_t _Reserved_TimeSource_3(void *);
|
||
|
virtual status_t _Reserved_TimeSource_4(void *);
|
||
|
virtual status_t _Reserved_TimeSource_5(void *);
|
||
|
|
||
|
bool fStopped;
|
||
|
|
||
|
area_id _mArea;
|
||
|
volatile _time_transmit_buf * _mBuf;
|
||
|
_BSlaveNodeStorageP * _mSlaveNodes;
|
||
|
|
||
|
area_id _mOrigArea;
|
||
|
uint32 _reserved_time_source_[11];
|
||
|
|
||
|
explicit BTimeSource(
|
||
|
media_node_id id);
|
||
|
void FinishCreate(); /* called by roster and/or server */
|
||
|
|
||
|
virtual status_t RemoveMe(BMediaNode * node);
|
||
|
virtual status_t AddMe(BMediaNode * node);
|
||
|
|
||
|
void DirectStart(bigtime_t at);
|
||
|
void DirectStop(bigtime_t at, bool immediate);
|
||
|
void DirectSeek(bigtime_t to, bigtime_t at);
|
||
|
void DirectSetRunMode(run_mode mode);
|
||
|
};
|
||
|
|
||
|
|
||
|
#endif /* _TIME_SOURCE_H */
|
||
|
|