haiku/src/kits/media/Controllable.cpp

/***********************************************************************
 * AUTHOR: Marcus Overhagen
 *   FILE: Controllable.cpp
 *  DESCR: 
 ***********************************************************************/
#include <OS.h>
#include <Controllable.h>
#include "debug.h"
#include "Notifications.h"

/*************************************************************
 * protected BControllable
 *************************************************************/

BControllable::~BControllable()
{
	CALLED();
	if (fSem > 0)
		delete_sem(fSem);
}

/*************************************************************
 * public BControllable
 *************************************************************/

BParameterWeb *
BControllable::Web()
{
	CALLED();
	BParameterWeb *temp;
	LockParameterWeb();
	temp = fWeb;
	UnlockParameterWeb();
	return temp;
}


bool
BControllable::LockParameterWeb()
{
	CALLED();
	status_t rv;
	if (fSem <= 0)
		return false;
	if (atomic_add(&fBen, 1) > 0) {
		while (B_INTERRUPTED == (rv = acquire_sem(fSem)))
			;
		return rv == B_OK;
	}
	return true;
}

/*************************************************************
 * protected BControllable
 *************************************************************/

void
BControllable::UnlockParameterWeb()
{
	CALLED();
	if (fSem <= 0)
		return;
	if (atomic_add(&fBen, -1) > 1)
		release_sem(fSem);
}


BControllable::BControllable() :
	BMediaNode("XXX fixme"),
	fWeb(0),
	fSem(create_sem(0, "BControllable lock")),
	fBen(0)
{
	CALLED();

	AddNodeKind(B_CONTROLLABLE);
}


status_t
BControllable::SetParameterWeb(BParameterWeb *web)
{
	CALLED();
	BParameterWeb *old;
	LockParameterWeb();
	old = fWeb;
	fWeb = web;
	UnlockParameterWeb();
	if (old != web && web != 0)
		BPrivate::media::notifications::WebChanged(Node());

	return B_OK;
}


status_t
BControllable::HandleMessage(int32 message,
							 const void *data,
							 size_t size)
{
	TRACE("BControllable::HandleMessage %#lx, node %ld\n", message, ID());

	return B_ERROR;
}


status_t
BControllable::BroadcastChangedParameter(int32 id)
{
	CALLED();
	return BPrivate::media::notifications::ParameterChanged(Node(), id);
}


status_t
BControllable::BroadcastNewParameterValue(bigtime_t when,
										  int32 id,
										  void *newValue,
										  size_t valueSize)
{
	CALLED();
	return BPrivate::media::notifications::NewParameterValue(Node(), id, when, newValue, valueSize);
}


status_t
BControllable::StartControlPanel(BMessenger *out_messenger)
{
	UNIMPLEMENTED();

	return B_ERROR;
}


status_t
BControllable::ApplyParameterData(const void *value,
								  size_t size)
{
	UNIMPLEMENTED();

	return B_ERROR;
}


status_t
BControllable::MakeParameterData(const int32 *controls,
								 int32 count,
								 void *buf,
								 size_t *ioSize)
{
	UNIMPLEMENTED();

	return B_ERROR;
}

/*************************************************************
 * private BControllable
 *************************************************************/

/*
private unimplemented 
BControllable::BControllable(const BControllable &clone)
BControllable & BControllable::operator=(const BControllable &clone)
*/

status_t BControllable::_Reserved_Controllable_0(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_1(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_2(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_3(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_4(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_5(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_6(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_7(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_8(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_9(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_10(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_11(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_12(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_13(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_14(void *) { return B_ERROR; }
status_t BControllable::_Reserved_Controllable_15(void *) { return B_ERROR; }