/**
 * OpenAL cross platform audio library
 * Copyright (C) 1999-2000 by authors.
 * This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 *  Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 *  License along with this library; if not, write to the
 *  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 *  Boston, MA  02111-1307, USA.
 * Or go to http://www.gnu.org/copyleft/lgpl.html
 */

#include "Include/alMain.h"
#include "AL/alc.h"
#include "Include/alError.h"
#include "Include/alListener.h"

ALAPI ALvoid ALAPIENTRY alListenerf(ALenum pname,ALfloat value)
{
	ALCcontext *Context;

	Context=alcGetCurrentContext();
	if (Context)
	{
		SuspendContext(Context);
		
		switch(pname) 
		{
		case AL_GAIN:
			if (value >= 0.0f)
			{
				if (value != Context->Listener.Gain)
				{
					Context->Listener.Gain = value;
					Context->Listener.update1 |= LVOLUME;
					UpdateContext(Context, ALLISTENER, 0);
				}
			}
			else
			{
				alSetError(AL_INVALID_VALUE);
			}
			break;

		default:
			alSetError(AL_INVALID_ENUM);
			break;
		}

		ProcessContext(Context);
	}
	else
	{
		// No Context
		alSetError(AL_INVALID_OPERATION);
	}

	return;
}


ALAPI ALvoid ALAPIENTRY alListener3f(ALenum pname,ALfloat v1,ALfloat v2,ALfloat v3)
{
	ALCcontext *Context;
	
	Context=alcGetCurrentContext();
	if (Context)
	{
		SuspendContext(Context);
		switch(pname) 
		{
		case AL_POSITION:
			if ((v1 != Context->Listener.Position[0])||
				(v2 != Context->Listener.Position[1])||
				(v3 != Context->Listener.Position[2]))
			{
				Context->Listener.Position[0] = v1;
				Context->Listener.Position[1] = v2;
				Context->Listener.Position[2] = v3;
				Context->Listener.update1 |= LPOSITION;
				UpdateContext(Context, ALLISTENER, 0);
			}
			break;

		case AL_VELOCITY:
			if ((v1 != Context->Listener.Velocity[0])||
				(v2 != Context->Listener.Velocity[1])||
				(v3 != Context->Listener.Velocity[2]))
			{
				Context->Listener.Velocity[0] = v1;
				Context->Listener.Velocity[1] = v2;
				Context->Listener.Velocity[2] = v3;
				Context->Listener.update1 |= LVELOCITY;
				UpdateContext(Context, ALLISTENER, 0);
			}
			break;

		default:
			alSetError(AL_INVALID_ENUM);
			break;
		}
	
		ProcessContext(Context);
	}
	else
	{
		// No Context
		alSetError(AL_INVALID_OPERATION);
	}

	return;
}


ALAPI ALvoid ALAPIENTRY alListenerfv(ALenum pname, const ALfloat *values)
{
	ALCcontext *Context;
	
	Context=alcGetCurrentContext();
	if (Context)
	{
		SuspendContext(Context);

		if (values)
		{
			switch(pname) 
			{
			case AL_POSITION:
				if ((values[0] != Context->Listener.Position[0])||
					(values[1] != Context->Listener.Position[1])||
					(values[2] != Context->Listener.Position[2]))
				{
					Context->Listener.Position[0] = values[0];
					Context->Listener.Position[1] = values[1];
					Context->Listener.Position[2] = values[2];
					Context->Listener.update1 |= LPOSITION;
					UpdateContext(Context, ALLISTENER, 0);
				}
				break;

			case AL_VELOCITY:
				if ((values[0] != Context->Listener.Velocity[0])||
					(values[1] != Context->Listener.Velocity[1])||
					(values[2] != Context->Listener.Velocity[2]))
				{
					Context->Listener.Velocity[0] = values[0];
					Context->Listener.Velocity[1] = values[1];
					Context->Listener.Velocity[2] = values[2];
					Context->Listener.update1 |= LVELOCITY;
					UpdateContext(Context, ALLISTENER, 0);
				}
				break;

			case AL_ORIENTATION:
				if ((values[0] != Context->Listener.Forward[0])||
					(values[1] != Context->Listener.Forward[1])||
					(values[2] != Context->Listener.Forward[2])||
					(values[3] != Context->Listener.Up[0])||
					(values[4] != Context->Listener.Up[1])||
					(values[5] != Context->Listener.Up[2]))
				{
					// AT then UP
					Context->Listener.Forward[0] = values[0];
					Context->Listener.Forward[1] = values[1];
					Context->Listener.Forward[2] = values[2];
					Context->Listener.Up[0] = values[3]; 
					Context->Listener.Up[1] = values[4];
					Context->Listener.Up[2] = values[5];
					Context->Listener.update1 |= LORIENTATION;
					UpdateContext(Context, ALLISTENER, 0);
				}
				break;

			default:
				alSetError(AL_INVALID_ENUM);
				break;
			}
		}
		else
		{
			// values is a NULL pointer
			alSetError(AL_INVALID_VALUE);
		}

	    ProcessContext(Context);
	}
	else
	{
		// Invalid Context
		alSetError(AL_INVALID_OPERATION);
	}

	return;

}


ALAPI ALvoid ALAPIENTRY alListeneri(ALenum pname,ALint value)
{
	ALCcontext *Context;

	Context=alcGetCurrentContext();
	if (Context)
	{
		SuspendContext(Context);
		
		switch(pname) 
		{
		default:
			alSetError(AL_INVALID_ENUM);
			break;
		}

		ProcessContext(Context);
	}
	else
	{
		// Invalid context
		alSetError(AL_INVALID_OPERATION);
	}

	return;
}


ALAPI ALvoid ALAPIENTRY alGetListenerf(ALenum pname,ALfloat *value)
{
	ALCcontext *Context;

	Context=alcGetCurrentContext();
	if (Context)
	{
		SuspendContext(Context);
	
		if (value)
		{
			switch(pname)
			{
				case AL_GAIN:
					*value = Context->Listener.Gain;
					break;
				default:
					alSetError(AL_INVALID_ENUM);
					break;
			}
		}
		else
		{
			// value is a NULL pointer
			alSetError(AL_INVALID_VALUE);
		}

		ProcessContext(Context);
	}
	else
	{ 
		// Invalid Context
		alSetError(AL_INVALID_OPERATION);
	}

	return;
}


ALAPI ALvoid ALAPIENTRY alGetListener3f(ALenum pname,ALfloat *v1,ALfloat *v2,ALfloat *v3)
{
	ALCcontext *Context;

	Context = alcGetCurrentContext();
	if (Context)
	{
		SuspendContext(Context);
	
		if ((v1) && (v2) && (v3))
		{
			switch(pname) 
			{
			case AL_POSITION:
				*v1=Context->Listener.Position[0];
				*v2=Context->Listener.Position[1];
				*v3=Context->Listener.Position[2];
				break;

			case AL_VELOCITY:
				*v1=Context->Listener.Velocity[0];
				*v2=Context->Listener.Velocity[1];
				*v3=Context->Listener.Velocity[2];
				break;

			default:
				alSetError(AL_INVALID_ENUM);
				break;
			}
		}
		else
		{
			alSetError(AL_INVALID_VALUE);
		}

		ProcessContext(Context);
	}
	else
	{
		// Invalid context
		alSetError(AL_INVALID_OPERATION);
	}
	
	return;
}


ALAPI ALvoid ALAPIENTRY alGetListenerfv(ALenum pname,ALfloat *values)
{
	ALCcontext *Context;
	
	Context = alcGetCurrentContext();
	if (Context)
	{
		SuspendContext(Context);

		if (values)
		{
			switch(pname) 
			{
			case AL_POSITION:
				values[0] = Context->Listener.Position[0];
				values[1] = Context->Listener.Position[1];
				values[2] = Context->Listener.Position[2];
				break;
			case AL_VELOCITY:
				values[0] = Context->Listener.Velocity[0];
				values[1] = Context->Listener.Velocity[1];
				values[2] = Context->Listener.Velocity[2];
				break;
			case AL_ORIENTATION:
				// AT then UP
				values[3] = Context->Listener.Up[0]; 
				values[4] = Context->Listener.Up[1];
				values[5] = Context->Listener.Up[2];
				values[0] = Context->Listener.Forward[0];
				values[1] = Context->Listener.Forward[1];
				values[2] = Context->Listener.Forward[2];
				break;
			default:
				alSetError(AL_INVALID_ENUM);
				break;
			}
		}
		else
		{
			// values is a NULL pointer
			alSetError(AL_INVALID_VALUE);
		}

		ProcessContext(Context);
	}
	else
	{
		// Invalid context
		alSetError(AL_INVALID_OPERATION);
	}

	return;
}


ALAPI ALvoid ALAPIENTRY alGetListeneri(ALenum pname,ALint *value)
{
	ALCcontext *Context;

	Context=alcGetCurrentContext();
	if (Context)
	{
		SuspendContext(Context);

		if (value)
		{
			switch(pname) 
			{
			default:
				alSetError(AL_INVALID_ENUM);
				break;
			}
		}
		else
		{
			// value is a NULL pointer
			alSetError(AL_INVALID_VALUE);
		}

		ProcessContext(Context);
	}
	else
	{
		// Invalid Context
		alSetError(AL_INVALID_OPERATION);

	}

	return;
}
