fteqw/engine/client/snd_al.c

#include "quakedef.h"

/*
This is based on Jogi's OpenAL support.
Much of it is stripped, to try and get it clean/compliant.

Missing features:
FIXME: listener velocity calculations (currently ugly).
FIXME: does not track entity velocities, so no dopler (awkward, quake doesn't move playing sounds at all).
FIXME: no eax / efx (underwater reverb etc).
FIXME: a capture device would be useful (voice chat).
*/

#ifdef AVAIL_OPENAL

#ifdef FTE_TARGET_WEB
//our javascript port doesn't support dynamic linking.
#define OPENAL_STATIC
#endif

#ifdef OPENAL_STATIC
#include <AL/al.h>	//output
#include <AL/alc.h>	//input

#ifndef AL_API
#define AL_API
#endif
#ifndef AL_APIENTRY
#define AL_APIENTRY
#endif

#define palGetError		alGetError
#define palSourcef		alSourcef
#define palSourcei		alSourcei
#define palSourcePlayv	alSourcePlayv
#define palSourceStopv	alSourceStopv
#define palSourcePlay		alSourcePlay
#define palSourceStop		alSourceStop
#define palDopplerFactor	alDopplerFactor
#define palGenBuffers		alGenBuffers
#define palIsBuffer		alIsBuffer
#define palBufferData		alBufferData
#define palDeleteBuffers	alDeleteBuffers
#define palListenerfv		alListenerfv
#define palSourcefv		alSourcefv
#define palGetString		alGetString
#define palGenSources		alGenSources
#define palListenerf		alListenerf
#define palDeleteBuffers	alDeleteBuffers
#define palDeleteSources	alDeleteSources
#define palSpeedOfSound	alSpeedOfSound
#define palDistanceModel	alDistanceModel
#define palGetSourcei		alGetSourcei
#define palSourceQueueBuffers	alSourceQueueBuffers
#define palSourceUnqueueBuffers	alSourceUnqueueBuffers


#define palcOpenDevice		alcOpenDevice
#define palcCloseDevice		alcCloseDevice
#define palcCreateContext		alcCreateContext
#define palcDestroyContext		alcDestroyContext
#define palcMakeContextCurrent	alcMakeContextCurrent
#define palcProcessContext		alcProcessContext
#define palcGetString			alcGetString
#define palcIsExtensionPresent	alcIsExtensionPresent

#ifdef FTE_TARGET_WEB	//emscripten sucks.
AL_API void (AL_APIENTRY alSpeedOfSound)( ALfloat value ) {}
#define alGetError() alGetError(NULL)
#endif
#else

#if defined(_WIN32)
 #define AL_APIENTRY __cdecl
#else
 #define AL_APIENTRY
#endif
#define AL_API


typedef int ALint;
typedef unsigned int ALuint;
typedef float ALfloat;
typedef int ALenum;
typedef char ALchar;
typedef char ALboolean;
typedef int ALsizei;
typedef void ALvoid;

static dllhandle_t *openallib;
static qboolean openallib_tried;
static AL_API ALenum (AL_APIENTRY *palGetError)( void );
static AL_API void (AL_APIENTRY *palSourcef)( ALuint sid, ALenum param, ALfloat value ); 
static AL_API void (AL_APIENTRY *palSourcei)( ALuint sid, ALenum param, ALint value ); 

static AL_API void (AL_APIENTRY *palSourcePlayv)( ALsizei ns, const ALuint *sids );
static AL_API void (AL_APIENTRY *palSourceStopv)( ALsizei ns, const ALuint *sids );
static AL_API void (AL_APIENTRY *palSourcePlay)( ALuint sid );
static AL_API void (AL_APIENTRY *palSourceStop)( ALuint sid );

static AL_API void (AL_APIENTRY *palDopplerFactor)( ALfloat value );

static AL_API void (AL_APIENTRY *palGenBuffers)( ALsizei n, ALuint* buffers );
static AL_API ALboolean (AL_APIENTRY *palIsBuffer)( ALuint bid );
static AL_API void (AL_APIENTRY *palBufferData)( ALuint bid, ALenum format, const ALvoid* data, ALsizei size, ALsizei freq );
static AL_API void (AL_APIENTRY *palDeleteBuffers)( ALsizei n, const ALuint* buffers );

static AL_API void (AL_APIENTRY *palListenerfv)( ALenum param, const ALfloat* values ); 
static AL_API void (AL_APIENTRY *palSourcefv)( ALuint sid, ALenum param, const ALfloat* values ); 
static AL_API const ALchar* (AL_APIENTRY *palGetString)( ALenum param );
static AL_API void (AL_APIENTRY *palGenSources)( ALsizei n, ALuint* sources ); 
static AL_API void (AL_APIENTRY *palListenerf)( ALenum param, ALfloat value );
static AL_API void (AL_APIENTRY *palDeleteBuffers)( ALsizei n, const ALuint* buffers );
static AL_API void (AL_APIENTRY *palDeleteSources)( ALsizei n, const ALuint* sources );
static AL_API void (AL_APIENTRY *palSpeedOfSound)( ALfloat value );
static AL_API void (AL_APIENTRY *palDistanceModel)( ALenum distanceModel );

//needed for streaming
static AL_API void (AL_APIENTRY *palGetSourcei)(ALuint source, ALenum pname, ALint *value);
static AL_API void (AL_APIENTRY *palSourceQueueBuffers)(ALuint source, ALsizei n, ALuint* buffers);
static AL_API void (AL_APIENTRY *palSourceUnqueueBuffers)(ALuint source, ALsizei n, ALuint* buffers);

#define AL_NONE                                   0
#define AL_FALSE                                  0
#define AL_TRUE                                   1
#define AL_SOURCE_RELATIVE                        0x202
#define AL_PITCH                                  0x1003
#define AL_POSITION                               0x1004
#define AL_VELOCITY                               0x1006
#define AL_LOOPING                                0x1007
#define AL_BUFFER                                 0x1009
#define AL_GAIN                                   0x100A
#define AL_ORIENTATION                            0x100F
#define	AL_SOURCE_STATE							  0x1010
#define	AL_PLAYING								  0x1012	
#define	AL_BUFFERS_QUEUED						  0x1015
#define	AL_BUFFERS_PROCESSED					  0x1016
#define AL_REFERENCE_DISTANCE                     0x1020
#define AL_ROLLOFF_FACTOR                         0x1021
#define AL_MAX_DISTANCE                           0x1023
#define	AL_SOURCE_TYPE							  0x1027
#define	AL_STREAMING							  0x1029
#define AL_FORMAT_MONO8                           0x1100
#define AL_FORMAT_MONO16                          0x1101
#define AL_FORMAT_STEREO8                         0x1102
#define AL_FORMAT_STEREO16                        0x1103
#define AL_INVALID_NAME                           0xA001
#define AL_INVALID_ENUM                           0xA002
#define AL_INVALID_VALUE                          0xA003
#define AL_INVALID_OPERATION                      0xA004
#define AL_OUT_OF_MEMORY                          0xA005
#define AL_VENDOR                                 0xB001
#define AL_VERSION                                0xB002
#define AL_RENDERER                               0xB003
#define AL_EXTENSIONS                             0xB004
#define AL_DISTANCE_MODEL                         0xD000
#define AL_INVERSE_DISTANCE                       0xD001
#define AL_INVERSE_DISTANCE_CLAMPED               0xD002
#define AL_LINEAR_DISTANCE                        0xD003
#define AL_LINEAR_DISTANCE_CLAMPED                0xD004
#define AL_EXPONENT_DISTANCE                      0xD005
#define AL_EXPONENT_DISTANCE_CLAMPED              0xD006




#if defined(_WIN32)
 #define ALC_APIENTRY __cdecl
#else
 #define ALC_APIENTRY
#endif
#define ALC_API

typedef char ALCboolean;
typedef char ALCchar;
typedef int ALCint;
typedef unsigned int ALCuint;
typedef int ALCenum;
typedef size_t ALCsizei;
typedef struct ALCdevice_struct ALCdevice;
typedef struct ALCcontext_struct ALCcontext;
typedef void ALCvoid;

static ALC_API ALCdevice *     (ALC_APIENTRY *palcOpenDevice)( const ALCchar *devicename );
static ALC_API ALCboolean      (ALC_APIENTRY *palcCloseDevice)( ALCdevice *device );

static ALC_API ALCcontext *    (ALC_APIENTRY *palcCreateContext)( ALCdevice *device, const ALCint* attrlist );
static ALC_API void            (ALC_APIENTRY *palcDestroyContext)( ALCcontext *context );
static ALC_API ALCboolean      (ALC_APIENTRY *palcMakeContextCurrent)( ALCcontext *context );
static ALC_API void            (ALC_APIENTRY *palcProcessContext)( ALCcontext *context );

static ALC_API const ALCchar * (ALC_APIENTRY *palcGetString)( ALCdevice *device, ALCenum param );
static ALC_API ALCboolean      (ALC_APIENTRY *palcIsExtensionPresent)( ALCdevice *device, const ALCchar *extname );

#define ALC_DEFAULT_DEVICE_SPECIFIER             0x1004
#define ALC_DEVICE_SPECIFIER                     0x1005
#define ALC_EXTENSIONS                           0x1006
#define ALC_ALL_DEVICES_SPECIFIER				 0x1013	//ALC_ENUMERATE_ALL_EXT

//#include "AL/alut.h"
//#include "AL/al.h"
//#include "AL/alext.h"

//capture-specific stuff
static ALC_API void           (ALC_APIENTRY *palcGetIntegerv)( ALCdevice *device, ALCenum param, ALCsizei size, ALCint *data );
static ALC_API ALCdevice *    (ALC_APIENTRY *palcCaptureOpenDevice)( const ALCchar *devicename, ALCuint frequency, ALCenum format, ALCsizei buffersize );
static ALC_API ALCboolean     (ALC_APIENTRY *palcCaptureCloseDevice)( ALCdevice *device );
static ALC_API void           (ALC_APIENTRY *palcCaptureStart)( ALCdevice *device );
static ALC_API void           (ALC_APIENTRY *palcCaptureStop)( ALCdevice *device );
static ALC_API void           (ALC_APIENTRY *palcCaptureSamples)( ALCdevice *device, ALCvoid *buffer, ALCsizei samples );
#define ALC_CAPTURE_DEVICE_SPECIFIER             0x310
#define ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER     0x311
#define ALC_CAPTURE_SAMPLES                      0x312

#endif



//efx
#ifdef USEEFX
#define AL_AUXILIARY_SEND_FILTER                 0x20006
#define AL_FILTER_NULL                           0x0000
#define AL_EFFECTSLOT_EFFECT                     0x0001
#define AL_EFFECT_TYPE                           0x8001
#define AL_EFFECT_REVERB                         0x0001
#define AL_EFFECT_EAXREVERB                      0x8000

#define AL_REVERB_DENSITY                        0x0001
#define AL_REVERB_DIFFUSION                      0x0002
#define AL_REVERB_GAIN                           0x0003
#define AL_REVERB_GAINHF                         0x0004
#define AL_REVERB_DECAY_TIME                     0x0005
#define AL_REVERB_DECAY_HFRATIO                  0x0006
#define AL_REVERB_REFLECTIONS_GAIN               0x0007
#define AL_REVERB_REFLECTIONS_DELAY              0x0008
#define AL_REVERB_LATE_REVERB_GAIN               0x0009
#define AL_REVERB_LATE_REVERB_DELAY              0x000A
#define AL_REVERB_AIR_ABSORPTION_GAINHF          0x000B
#define AL_REVERB_ROOM_ROLLOFF_FACTOR            0x000C
#define AL_REVERB_DECAY_HFLIMIT                  0x000D

/* EAX Reverb effect parameters */
#define AL_EAXREVERB_DENSITY                     0x0001
#define AL_EAXREVERB_DIFFUSION                   0x0002
#define AL_EAXREVERB_GAIN                        0x0003
#define AL_EAXREVERB_GAINHF                      0x0004
#define AL_EAXREVERB_GAINLF                      0x0005
#define AL_EAXREVERB_DECAY_TIME                  0x0006
#define AL_EAXREVERB_DECAY_HFRATIO               0x0007
#define AL_EAXREVERB_DECAY_LFRATIO               0x0008
#define AL_EAXREVERB_REFLECTIONS_GAIN            0x0009
#define AL_EAXREVERB_REFLECTIONS_DELAY           0x000A
#define AL_EAXREVERB_REFLECTIONS_PAN             0x000B
#define AL_EAXREVERB_LATE_REVERB_GAIN            0x000C
#define AL_EAXREVERB_LATE_REVERB_DELAY           0x000D
#define AL_EAXREVERB_LATE_REVERB_PAN             0x000E
#define AL_EAXREVERB_ECHO_TIME                   0x000F
#define AL_EAXREVERB_ECHO_DEPTH                  0x0010
#define AL_EAXREVERB_MODULATION_TIME             0x0011
#define AL_EAXREVERB_MODULATION_DEPTH            0x0012
#define AL_EAXREVERB_AIR_ABSORPTION_GAINHF       0x0013
#define AL_EAXREVERB_HFREFERENCE                 0x0014
#define AL_EAXREVERB_LFREFERENCE                 0x0015
#define AL_EAXREVERB_ROOM_ROLLOFF_FACTOR         0x0016
#define AL_EAXREVERB_DECAY_HFLIMIT               0x0017
static AL_API void*(AL_APIENTRY *palGetProcAddress)(const ALchar *fname);
static AL_API void (AL_APIENTRY *palSource3i)(ALuint source, ALenum param, ALint value1, ALint value2, ALint value3);

static AL_API void (AL_APIENTRY *palAuxiliaryEffectSloti)(ALuint effectslot, ALenum param, ALint iValue);
static AL_API ALvoid (AL_APIENTRY *palGenAuxiliaryEffectSlots)(ALsizei n, ALuint *effectslots);
static AL_API ALvoid (AL_APIENTRY *palDeleteAuxiliaryEffectSlots)(ALsizei n, const ALuint *effectslots);
static AL_API ALvoid (AL_APIENTRY *palDeleteEffects)(ALsizei n, const ALuint *effects);

static AL_API ALvoid (AL_APIENTRY *palGenEffects)(ALsizei n, ALuint *effects);
static AL_API ALvoid (AL_APIENTRY *palEffecti)(ALuint effect, ALenum param, ALint iValue);
static AL_API ALvoid (AL_APIENTRY *palEffectiv)(ALuint effect, ALenum param, const ALint *piValues);
static AL_API ALvoid (AL_APIENTRY *palEffectf)(ALuint effect, ALenum param, ALfloat flValue);
static AL_API ALvoid (AL_APIENTRY *palEffectfv)(ALuint effect, ALenum param, const ALfloat *pflValues);
#endif

#define SOUNDVARS "OpenAL variables"


extern sfx_t *known_sfx;
extern int loaded_sfx;
extern int num_sfx;


static void QDECL OnChangeALMaxDistance (cvar_t *var, char *value);
static void QDECL OnChangeALSpeedOfSound (cvar_t *var, char *value);
static void QDECL OnChangeALDopplerFactor (cvar_t *var, char *value);
static void QDECL OnChangeALDistanceModel (cvar_t *var, char *value);
/*
static void S_Init_f(void);
static void S_Info(void);

static void S_Shutdown_f(void);
*/
static cvar_t s_al_debug = CVAR("s_al_debug", "0");
static cvar_t s_al_max_distance = CVARFC("s_al_max_distance", "1000",0,OnChangeALMaxDistance);
static cvar_t s_al_speedofsound = CVARFC("s_al_speedofsound", "343.3",0,OnChangeALSpeedOfSound);
static cvar_t s_al_dopplerfactor = CVARFC("s_al_dopplerfactor", "3.0",0,OnChangeALDopplerFactor);
static cvar_t s_al_distancemodel = CVARFC("s_al_distancemodel", "2",0,OnChangeALDistanceModel);
static cvar_t s_al_rolloff_factor = CVAR("s_al_rolloff_factor", "1");
static cvar_t s_al_reference_distance = CVAR("s_al_reference_distance", "120");
static cvar_t s_al_velocityscale = CVAR("s_al_velocityscale", "1");
static cvar_t s_al_static_listener = CVAR("s_al_static_listener", "0");	//cheat

typedef struct
{
	#define NUM_SOURCES MAX_CHANNELS
	ALuint source[NUM_SOURCES];

	ALCdevice *OpenAL_Device;
	ALCcontext *OpenAL_Context;

	ALfloat ListenPos[3];// = { 0.0, 0.0, 0.0 };

	// Velocity of the listener.
	ALfloat ListenVel[3];// = { 0.0, 0.0, 0.0 };

	// Orientation of the listener. (first 3 elements are "at", second 3 are "up")
	ALfloat ListenOri[6];// = { 0.0, 0.0, -1.0, 0.0, 1.0, 0.0 };

	int cureffect;
	ALuint effectslot;			//the global reverb slot
	ALuint effecttype[2];	//effect used when underwater
} oalinfo_t;
static void PrintALError(char *string)
{
	ALenum err;
	char *text = NULL;
	if (!s_al_debug.value)
		return;
	err = palGetError();
	switch(err)
	{
	case 0:
		return;
	case AL_INVALID_NAME:
		text = "invalid name";
		break;
	case AL_INVALID_ENUM:
		text = "invalid enum";
		break;
	case AL_INVALID_VALUE:
		text = "invalid value";
		break;
	case AL_INVALID_OPERATION:
		text = "invalid operation";
		break;
	case AL_OUT_OF_MEMORY:
		text = "out of memory";
		break;
	default:
		text = "unknown";
		break;
	}
	Con_Printf("OpenAL - %s: %x: %s\n",string,err,text);
}

qboolean OpenAL_LoadCache(unsigned int *bufptr, sfxcache_t *sc, float volume)
{
	unsigned int fmt;
	unsigned int size;
	switch(sc->width)
	{
#ifdef FTE_TARGET_WEB
	case 0:
		palGenBuffers(1, bufptr);
		emscriptenfte_al_loadaudiofile(*bufptr, sc->data, sc->length);
		//not allowed to play it yet, because it (probably) doesn't exist yet.
		return false;
#endif
	case 1:
		if (sc->numchannels == 2)
		{
			fmt = AL_FORMAT_STEREO8;
			size = sc->length*2;
		}
		else
		{
			fmt = AL_FORMAT_MONO8;
			size = sc->length*1;
		}
		break;
	case 2:
		if (sc->numchannels == 2)
		{
			fmt = AL_FORMAT_STEREO16;
			size = sc->length*4;
		}
		else
		{
			fmt = AL_FORMAT_MONO16;
			size = sc->length*2;
		}
		break;
	default:
		return false;
	}
	PrintALError("pre Buffer Data");
	palGenBuffers(1, bufptr);
	/*openal is inconsistant and supports only 8bit unsigned or 16bit signed*/
	if (volume != 1)
	{
		if (sc->width == 1)
		{
			unsigned char *tmp = malloc(size);
			char *src = sc->data;
			int i;
			for (i = 0; i < size; i++)
			{
				tmp[i] = src[i]*volume+128;	//signed->unsigned
			}
			palBufferData(*bufptr, fmt, tmp, size, sc->speed);
			free(tmp);
		}
		else
		{
			short *tmp = malloc(size);
			short *src = (short*)sc->data;
			int i;
			for (i = 0; i < (size>>1); i++)
			{
				tmp[i] = bound(-32767, src[i]*volume, 32767);	//signed.
			}
			palBufferData(*bufptr, fmt, tmp, size, sc->speed);
			free(tmp);
		}
	}
	else
	{
		if (sc->width == 1)
		{
			unsigned char *tmp = malloc(size);
			char *src = sc->data;
			int i;
			for (i = 0; i < size; i++)
			{
				tmp[i] = src[i]+128;
			}
			palBufferData(*bufptr, fmt, tmp, size, sc->speed);
			free(tmp);
		}
		else
		{
#if 0
			short *tmp = malloc(size);
			memcpy(tmp, sc->data, size);
			palBufferData(*bufptr, fmt, tmp, size, sc->speed);
			free(tmp);
#else
			palBufferData(*bufptr, fmt, sc->data, size, sc->speed);
#endif
		}
	}

	//FIXME: we need to handle oal-oom error codes

	PrintALError("Buffer Data");
	return true;
}

void OpenAL_CvarInit(void)
{
	Cvar_Register(&s_al_debug, SOUNDVARS);
	Cvar_Register(&s_al_max_distance, SOUNDVARS);
	Cvar_Register(&s_al_dopplerfactor, SOUNDVARS);
	Cvar_Register(&s_al_distancemodel, SOUNDVARS);
	Cvar_Register(&s_al_reference_distance, SOUNDVARS);
	Cvar_Register(&s_al_rolloff_factor, SOUNDVARS);
	Cvar_Register(&s_al_velocityscale, SOUNDVARS);
	Cvar_Register(&s_al_static_listener, SOUNDVARS);
	Cvar_Register(&s_al_speedofsound, SOUNDVARS);
}

extern float voicevolumemod;
static void OpenAL_ListenerUpdate(soundcardinfo_t *sc, vec3_t origin, vec3_t forward, vec3_t right, vec3_t up, vec3_t velocity)
{
	oalinfo_t *oali = sc->handle;

	VectorScale(velocity, s_al_velocityscale.value, oali->ListenVel);
	VectorCopy(origin, oali->ListenPos);

	oali->ListenOri[0] = forward[0];
	oali->ListenOri[1] = forward[1];
	oali->ListenOri[2] = forward[2];
	oali->ListenOri[3] = up[0];
	oali->ListenOri[4] = up[1];
	oali->ListenOri[5] = up[2];


	if (!s_al_static_listener.value)
	{
		palListenerf(AL_GAIN, 1);
		palListenerfv(AL_POSITION, oali->ListenPos);
		palListenerfv(AL_VELOCITY, oali->ListenVel);
		palListenerfv(AL_ORIENTATION, oali->ListenOri);
	}
}

//schanged says the sample has changed, otherwise its merely moved around a little, maybe changed in volume, but nothing that will restart it.
static void OpenAL_ChannelUpdate(soundcardinfo_t *sc, channel_t *chan, unsigned int schanged)
{
	oalinfo_t *oali = sc->handle;
	ALuint src;
	sfx_t *sfx = chan->sfx;
	float pitch, cvolume;
	int chnum = chan - sc->channel;
	ALuint buf;

	if (chnum >= NUM_SOURCES)
		return;

	src = oali->source[chnum];
	if (!src)
	{
		//not currently playing. be prepared to create one
		if (!sfx || chan->master_vol == 0)
			return;
		palGenSources(1, &src);
		//unable to start a new sound source, give up.
		if (!src)
		{
			//FIXME: find one which has already stopped and steal it.
			Con_Printf("Out of OpenAL sources!\n");
			return;
		}
		oali->source[chnum] = src;
		schanged = true;	//should normally be true anyway, but hey
	}

	PrintALError("pre start sound");

	if (schanged && src)
		palSourceStop(src);

	//reclaim any queued buffers
	if (src)
	{
		palGetSourcei(src, AL_SOURCE_TYPE, &buf);
		if (buf == AL_STREAMING)
		{
			for(;;)
			{
				palGetSourcei(src, AL_BUFFERS_PROCESSED, &buf);
				if (!buf)
					break;
				palSourceUnqueueBuffers(src, 1, &buf);
				palDeleteBuffers(1, &buf);
			}
		}
	}
	if (!schanged && sfx)	//if we don't figure out when they've finished, they'll not get replaced properly.
	{
		palGetSourcei(src, AL_SOURCE_STATE, &buf);
		if (buf != AL_PLAYING)
		{
			schanged = true;
			if (chan->flags & CF_FORCELOOP)
				chan->pos = 0;
			else
				sfx = chan->sfx = NULL;
		}
	}

	/*just wanted to stop it?*/
	if (!sfx || chan->master_vol == 0)
	{
		if (src)
		{
#ifdef FTE_TARGET_WEB
			//emscripten's webaudio wrapper spams error messages after alDeleteSources has been called, if the context isn't also killed.
			if (!schanged)
				palSourceStop(src);
#else
			palDeleteSources(1, &src);
			oali->source[chnum] = 0;
#endif
		}
		return;
	}

	cvolume = chan->master_vol/255.0f;
	if (!(chan->flags & CF_ABSVOLUME))
		cvolume *= volume.value*voicevolumemod;

	if (schanged || sfx->decoder.decodedata)
	{
		if (!sfx->openal_buffer)
		{
			if (!S_LoadSound(sfx))
				return;	//can't load it
			if (sfx->loadstate != SLS_LOADED)
			{
				if (sfx->loadstate == SLS_LOADING)
				{
					palDeleteSources(1, &src);
					oali->source[chnum] = 0;
				}
				return;	//not available yet
			}
			if (sfx->decoder.decodedata)
			{
				int offset;
				sfxcache_t sbuf, *sc;
				palGetSourcei(src, AL_BUFFERS_QUEUED, &buf);
				if (buf <= 2)
				{	//decode periodically instead of all at the start.
					sc = sfx->decoder.decodedata(sfx, &sbuf, chan->pos>>PITCHSHIFT, 65536);
					if (sc)
					{
						memcpy(&sbuf, sc, sizeof(sbuf));

						//hack up the sound to offset it correctly
						offset = (chan->pos>>PITCHSHIFT) - sbuf.soundoffset;
						sbuf.data += offset * sc->width*sc->numchannels;
						sbuf.length -= offset;


						sbuf.soundoffset = 0;

						//build a buffer with it and queue it up.
						//buffer will be purged later on when its unqueued
						OpenAL_LoadCache(&buf, &sbuf, max(1,cvolume));
						palSourceQueueBuffers(src, 1, &buf);

						//yay
						chan->pos += sbuf.length<<PITCHSHIFT;

						palGetSourcei(src, AL_SOURCE_STATE, &buf);
						if (buf != AL_PLAYING)
							schanged = true;
					}
					else
					{
						palGetSourcei(src, AL_SOURCE_STATE, &buf);
						if (buf != AL_PLAYING)
						{
							if (chan->flags & CF_FORCELOOP)
								chan->pos = 0;
//							else if(sbuf.loopstart != -1)
//								chan->pos = sbuf.loopstart<<PITCHSHIFT;
							else
							{
								chan->sfx = NULL;
								if (sfx->decoder.ended)
								{
									if (!S_IsPlayingSomewhere(sfx))
										sfx->decoder.ended(sfx);
								}
							}
							return;
						}
					}
				}
			}
			else
			{
				if (!sfx->decoder.buf)
					return;
				if (!OpenAL_LoadCache(&sfx->openal_buffer, sfx->decoder.buf, 1))
					return;
				palSourcei(src, AL_BUFFER, sfx->openal_buffer);
			}
		}
#ifdef FTE_TARGET_WEB
		//loading an ogg is async, so we must wait until its valid.
		else if (!palIsBuffer(sfx->openal_buffer))
			return;
#endif
		else
			palSourcei(src, AL_BUFFER, sfx->openal_buffer);
	}

	palSourcef(src, AL_GAIN, min(cvolume, 1));	//openal only supports a max volume of 1. anything above is an error and will be clamped.
	if ((chan->flags & CF_NOSPACIALISE) || chan->entnum == cl.playerview[0].viewentity || !chan->dist_mult)
	{
		palSourcefv(src, AL_POSITION, vec3_origin);
		palSourcefv(src, AL_VELOCITY, vec3_origin);
	}
	else
	{
		palSourcefv(src, AL_POSITION, chan->origin);
		palSourcefv(src, AL_VELOCITY, vec3_origin);	//FIXME
	}

	if (schanged)
	{
		pitch = (float)chan->rate/(1<<PITCHSHIFT);
		palSourcef(src, AL_PITCH, pitch);

#ifdef USEEFX
		if (chan->entnum == -2)	//don't do the underwater thing on static sounds. it sounds like arse with all those sources.
			palSource3i(src, AL_AUXILIARY_SEND_FILTER, 0, 0, AL_FILTER_NULL);
		else
			palSource3i(src, AL_AUXILIARY_SEND_FILTER, oali->effectslot, 0, AL_FILTER_NULL);
#endif

		palSourcei(src, AL_LOOPING, (chan->flags & CF_FORCELOOP)?AL_TRUE:AL_FALSE);
		if ((chan->flags & CF_NOSPACIALISE) || chan->entnum == cl.playerview[0].viewentity || !chan->dist_mult)
		{
			palSourcei(src, AL_SOURCE_RELATIVE, AL_TRUE);
//			palSourcef(src, AL_ROLLOFF_FACTOR, 0.0f);
		}
		else
		{
			palSourcei(src, AL_SOURCE_RELATIVE, AL_FALSE);
//			palSourcef(src, AL_ROLLOFF_FACTOR, s_al_rolloff_factor.value*chan->dist_mult);
		}

		//this is disgustingly shit.
		//logically we want to set the distance divisor to 1 and the rolloff factor to dist_mult.
		//but openal clamps in an annoying order (probably to keep things signed in hardware) and webaudio refuses infinity, so we need to special case no attenuation to get around the issue
		if (chan->dist_mult < 0.000001)
		{
			palSourcef(src, AL_ROLLOFF_FACTOR, 0);
			palSourcef(src, AL_REFERENCE_DISTANCE, 0);
			palSourcef(src, AL_MAX_DISTANCE, 1);	//doesn't matter, so long as its not a nan
		}
		else
		{
			switch(s_al_distancemodel.ival)
			{
			default:
				palSourcef(src, AL_ROLLOFF_FACTOR, s_al_reference_distance.value);
				palSourcef(src, AL_REFERENCE_DISTANCE, 1);
				palSourcef(src, AL_MAX_DISTANCE, 1/chan->dist_mult);	//clamp to the maximum distance you'd normally be allowed to hear... this is probably going to be annoying.
				break;
			case 2:	//linear, mimic quake.
				palSourcef(src, AL_ROLLOFF_FACTOR, 1);
				palSourcef(src, AL_REFERENCE_DISTANCE, 0);
				palSourcef(src, AL_MAX_DISTANCE, 1/chan->dist_mult);
				break;
			}
		}

	/*and start it up again*/
		palSourcePlay(src);
	}

	PrintALError("post start sound");
}

/*
static void S_Info (void)
{
	if (OpenAL_Device == NULL)
		return;

	Con_Printf("OpenAL Version        : %s\n",palGetString(AL_VERSION));
	Con_Printf("OpenAL Vendor         : %s\n",palGetString(AL_VENDOR));
	Con_Printf("OpenAL Renderer       : %s\n",palGetString(AL_RENDERER));
	if(palcIsExtensionPresent(NULL, (const ALCchar*)"ALC_ENUMERATION_EXT")==AL_TRUE)
	{
		Con_Printf("OpenAL Device         : %s\n",palcGetString(OpenAL_Device,ALC_DEVICE_SPECIFIER));
	}
	Con_Printf("OpenAL Default Device : %s\n",palcGetString(OpenAL_Device,ALC_DEFAULT_DEVICE_SPECIFIER));
	Con_Printf("OpenAL AL Extension   : %s\n",palGetString(AL_EXTENSIONS));
	Con_Printf("OpenAL ALC Extension  : %s\n",palcGetString(NULL,ALC_EXTENSIONS));
}
*/

static qboolean OpenAL_InitLibrary(void)
{
#ifdef OPENAL_STATIC
	return true;
#else
	static dllfunction_t openalfuncs[] =
	{
		{(void*)&palGetError, "alGetError"},
		{(void*)&palSourcef, "alSourcef"},
		{(void*)&palSourcei, "alSourcei"},
		{(void*)&palSourcePlayv, "alSourcePlayv"},
		{(void*)&palSourceStopv, "alSourceStopv"},
		{(void*)&palSourcePlay, "alSourcePlay"},
		{(void*)&palSourceStop, "alSourceStop"},
		{(void*)&palDopplerFactor, "alDopplerFactor"},
		{(void*)&palGenBuffers, "alGenBuffers"},
		{(void*)&palIsBuffer, "alIsBuffer"},
		{(void*)&palBufferData, "alBufferData"},
		{(void*)&palDeleteBuffers, "alDeleteBuffers"},
		{(void*)&palListenerfv, "alListenerfv"},
		{(void*)&palSourcefv, "alSourcefv"},
		{(void*)&palGetString, "alGetString"},
		{(void*)&palGenSources, "alGenSources"},
		{(void*)&palListenerf, "alListenerf"},
		{(void*)&palDeleteSources, "alDeleteSources"},
		{(void*)&palSpeedOfSound, "alSpeedOfSound"},
		{(void*)&palDistanceModel, "alDistanceModel"},

#ifdef USEEFX
		{(void*)&palGetProcAddress, "alGetProcAddress"},
#endif
		{(void*)&palGetSourcei, "alGetSourcei"},
		{(void*)&palSourceQueueBuffers, "alSourceQueueBuffers"},
		{(void*)&palSourceUnqueueBuffers, "alSourceUnqueueBuffers"},

		{(void*)&palcOpenDevice, "alcOpenDevice"},
		{(void*)&palcCloseDevice, "alcCloseDevice"},
		{(void*)&palcCreateContext, "alcCreateContext"},
		{(void*)&palcDestroyContext, "alcDestroyContext"},
		{(void*)&palcMakeContextCurrent, "alcMakeContextCurrent"},
		{(void*)&palcProcessContext, "alcProcessContext"},
		{(void*)&palcGetString, "alcGetString"},
		{(void*)&palcIsExtensionPresent, "alcIsExtensionPresent"},
		{NULL}
	};

	if (!openallib_tried)
	{
		openallib_tried = true;
#ifdef _WIN32
		openallib = Sys_LoadLibrary("OpenAL32", openalfuncs);
#else
		openallib = Sys_LoadLibrary("libopenal.so.1", openalfuncs);
		if (!openallib)
			openallib = Sys_LoadLibrary("libopenal", openalfuncs);
#endif
	}
	return !!openallib;
#endif
}

static qboolean OpenAL_Init(soundcardinfo_t *sc, const char *devname)
{
	oalinfo_t *oali = Z_Malloc(sizeof(oalinfo_t));
	sc->handle = oali;

	if (!OpenAL_InitLibrary())
	{
		Con_Printf("OpenAL is not installed\n");
		return false;
	}

	if (oali->OpenAL_Context)
	{
		Con_Printf("OpenAL: only able to load one device at a time\n");
		return false;
	}

	oali->OpenAL_Device = palcOpenDevice(devname);
	if (oali->OpenAL_Device == NULL)
	{
		PrintALError("Could not init a sound device\n");
		return false;
	}

	oali->OpenAL_Context = palcCreateContext(oali->OpenAL_Device, NULL);
	if (!oali->OpenAL_Context)
		return false;

	palcMakeContextCurrent(oali->OpenAL_Context);
//	palcProcessContext(oali->OpenAL_Context);

	//S_Info();

	//fixme...
	memset(oali->source, 0, sizeof(oali->source));
	PrintALError("alGensources for normal sources");


	palListenerfv(AL_POSITION, oali->ListenPos);
	palListenerfv(AL_VELOCITY, oali->ListenVel);
	palListenerfv(AL_ORIENTATION, oali->ListenOri);

	return true;
}

static void QDECL OnChangeALMaxDistance (cvar_t *var, char *oldvalue)
{
}
static void QDECL OnChangeALSpeedOfSound (cvar_t *var, char *value)
{
	if (palSpeedOfSound)
		palSpeedOfSound(var->value);
}
static void QDECL OnChangeALDopplerFactor (cvar_t *var, char *oldvalue)
{
	if (palDopplerFactor)
		palDopplerFactor(var->value);
}
static void QDECL OnChangeALDistanceModel (cvar_t *var, char *oldvalue)
{
	if (!palDistanceModel)
		return;

	switch (var->ival)
	{
		case 0:
			palDistanceModel(AL_INVERSE_DISTANCE);
			break;
		case 1:
			palDistanceModel(AL_INVERSE_DISTANCE_CLAMPED);
			break;
		case 2:
			palDistanceModel(AL_LINEAR_DISTANCE);
			break;
		case 3:
			palDistanceModel(AL_LINEAR_DISTANCE_CLAMPED);
			break;
		case 4:
			palDistanceModel(AL_EXPONENT_DISTANCE);
			break;
		case 5:
			palDistanceModel(AL_EXPONENT_DISTANCE_CLAMPED);
			break;
		case 6:
			palDistanceModel(AL_NONE);
			break;
		default:
			Cvar_ForceSet(var, "0");
	}	
}

/*stub should not be called*/
static void *OpenAL_LockBuffer (soundcardinfo_t *sc, unsigned int *sampidx)
{
	//Con_Printf("OpenAL: LockBuffer\n");
	return NULL;
}

/*stub should not be called*/
static void OpenAL_UnlockBuffer (soundcardinfo_t *sc, void *buffer)
{
	//Con_Printf("OpenAL: UnlockBuffer\n");
}

static void OpenAL_SetUnderWater (soundcardinfo_t *sc, qboolean underwater)
{
#ifdef USEEFX
	oalinfo_t *oali = sc->handle;

	if (!oali->effectslot)
		return;
	//don't spam it
	if (oali->cureffect == underwater)
		return;
	oali->cureffect = underwater;
	PrintALError("preunderwater");
	palAuxiliaryEffectSloti(oali->effectslot, AL_EFFECTSLOT_EFFECT, oali->effecttype[oali->cureffect]);
	PrintALError("postunderwater");
	//Con_Printf("OpenAL: SetUnderWater %i\n", underwater);
#endif
}

/*stub should not be called*/
static void OpenAL_Submit (soundcardinfo_t *sc, int start, int end)
{
	//Con_Printf("OpenAL: Submit\n");
}

/*stub should not be called*/
static unsigned int OpenAL_GetDMAPos (soundcardinfo_t *sc)
{
	//Con_Printf("OpenAL: GetDMAPos\n");
	return 0;
}

static void OpenAL_Shutdown (soundcardinfo_t *sc)
{
	oalinfo_t *oali = sc->handle;
	int i;

	palDeleteSources(NUM_SOURCES, oali->source);

	/*make sure the buffers are cleared from the sound effects*/
	for (i=0;i<num_sfx;i++)
	{
		if (known_sfx[i].openal_buffer)
		{
			palDeleteBuffers(1,&known_sfx[i].openal_buffer);
			known_sfx[i].openal_buffer = 0;
		}
	}

#ifdef USEEFX
	palDeleteAuxiliaryEffectSlots(1, &oali->effectslot);
	palDeleteEffects(1, &oali->effecttype[1]);
#endif

	palcDestroyContext(oali->OpenAL_Context);
	palcCloseDevice(oali->OpenAL_Device);
	Z_Free(oali);
}

typedef struct {
    float flDensity;
    float flDiffusion;
    float flGain;
    float flGainHF;
    float flGainLF;
    float flDecayTime;
    float flDecayHFRatio;
    float flDecayLFRatio;
    float flReflectionsGain;
    float flReflectionsDelay;
    float flReflectionsPan[3];
    float flLateReverbGain;
    float flLateReverbDelay;
    float flLateReverbPan[3];
    float flEchoTime;
    float flEchoDepth;
    float flModulationTime;
    float flModulationDepth;
    float flAirAbsorptionGainHF;
    float flHFReference;
    float flLFReference;
    float flRoomRolloffFactor;
    int   iDecayHFLimit;
} EFXEAXREVERBPROPERTIES, *LPEFXEAXREVERBPROPERTIES;
#define EFX_REVERB_PRESET_PSYCHOTIC \
    { 0.0625f, 0.5000f, 0.3162f, 0.8404f, 1.0000f, 7.5600f, 0.9100f, 1.0000f, 0.4864f, 0.0200f, { 0.0000f, 0.0000f, 0.0000f }, 2.4378f, 0.0300f, { 0.0000f, 0.0000f, 0.0000f }, 0.2500f, 0.0000f, 4.0000f, 1.0000f, 0.9943f, 5000.0000f, 250.0000f, 0.0000f, 0x0 }
#define EFX_REVERB_PRESET_UNDERWATER \
    { 0.3645f, 1.0000f, 0.3162f, 0.0100f, 1.0000f, 1.4900f, 0.1000f, 1.0000f, 0.5963f, 0.0070f, { 0.0000f, 0.0000f, 0.0000f }, 7.0795f, 0.0110f, { 0.0000f, 0.0000f, 0.0000f }, 0.2500f, 0.0000f, 1.1800f, 0.3480f, 0.9943f, 5000.0000f, 250.0000f, 0.0000f, 0x1 }
ALuint OpenAL_LoadEffect(const EFXEAXREVERBPROPERTIES *reverb)
{
	ALuint effect = 0;
#ifdef AL_EFFECT_EAXREVERB
	palGenEffects(1, &effect);
	if(alGetEnumValue("AL_EFFECT_EAXREVERB") != 0)
	{
		/* EAX Reverb is available. Set the EAX effect type then load the
		 * reverb properties. */
		palEffecti(effect, AL_EFFECT_TYPE, AL_EFFECT_EAXREVERB);

		palEffectf(effect, AL_EAXREVERB_DENSITY, reverb->flDensity);
		palEffectf(effect, AL_EAXREVERB_DIFFUSION, reverb->flDiffusion);
		palEffectf(effect, AL_EAXREVERB_GAIN, reverb->flGain);
		palEffectf(effect, AL_EAXREVERB_GAINHF, reverb->flGainHF);
		palEffectf(effect, AL_EAXREVERB_GAINLF, reverb->flGainLF);
		palEffectf(effect, AL_EAXREVERB_DECAY_TIME, reverb->flDecayTime);
		palEffectf(effect, AL_EAXREVERB_DECAY_HFRATIO, reverb->flDecayHFRatio);
		palEffectf(effect, AL_EAXREVERB_DECAY_LFRATIO, reverb->flDecayLFRatio);
		palEffectf(effect, AL_EAXREVERB_REFLECTIONS_GAIN, reverb->flReflectionsGain);
		palEffectf(effect, AL_EAXREVERB_REFLECTIONS_DELAY, reverb->flReflectionsDelay);
		palEffectfv(effect, AL_EAXREVERB_REFLECTIONS_PAN, reverb->flReflectionsPan);
		palEffectf(effect, AL_EAXREVERB_LATE_REVERB_GAIN, reverb->flLateReverbGain);
		palEffectf(effect, AL_EAXREVERB_LATE_REVERB_DELAY, reverb->flLateReverbDelay);
		palEffectfv(effect, AL_EAXREVERB_LATE_REVERB_PAN, reverb->flLateReverbPan);
		palEffectf(effect, AL_EAXREVERB_ECHO_TIME, reverb->flEchoTime);
		palEffectf(effect, AL_EAXREVERB_ECHO_DEPTH, reverb->flEchoDepth);
		palEffectf(effect, AL_EAXREVERB_MODULATION_TIME, reverb->flModulationTime);
		palEffectf(effect, AL_EAXREVERB_MODULATION_DEPTH, reverb->flModulationDepth);
		palEffectf(effect, AL_EAXREVERB_AIR_ABSORPTION_GAINHF, reverb->flAirAbsorptionGainHF);
		palEffectf(effect, AL_EAXREVERB_HFREFERENCE, reverb->flHFReference);
		palEffectf(effect, AL_EAXREVERB_LFREFERENCE, reverb->flLFReference);
		palEffectf(effect, AL_EAXREVERB_ROOM_ROLLOFF_FACTOR, reverb->flRoomRolloffFactor);
		palEffecti(effect, AL_EAXREVERB_DECAY_HFLIMIT, reverb->iDecayHFLimit);
	}
	else
	{
		/* No EAX Reverb. Set the standard reverb effect type then load the
		 * available reverb properties. */
		palEffecti(effect, AL_EFFECT_TYPE, AL_EFFECT_REVERB);

		palEffectf(effect, AL_REVERB_DENSITY, reverb->flDensity);
		palEffectf(effect, AL_REVERB_DIFFUSION, reverb->flDiffusion);
		palEffectf(effect, AL_REVERB_GAIN, reverb->flGain);
		palEffectf(effect, AL_REVERB_GAINHF, reverb->flGainHF);
		palEffectf(effect, AL_REVERB_DECAY_TIME, reverb->flDecayTime);
		palEffectf(effect, AL_REVERB_DECAY_HFRATIO, reverb->flDecayHFRatio);
		palEffectf(effect, AL_REVERB_REFLECTIONS_GAIN, reverb->flReflectionsGain);
		palEffectf(effect, AL_REVERB_REFLECTIONS_DELAY, reverb->flReflectionsDelay);
		palEffectf(effect, AL_REVERB_LATE_REVERB_GAIN, reverb->flLateReverbGain);
		palEffectf(effect, AL_REVERB_LATE_REVERB_DELAY, reverb->flLateReverbDelay);
		palEffectf(effect, AL_REVERB_AIR_ABSORPTION_GAINHF, reverb->flAirAbsorptionGainHF);
		palEffectf(effect, AL_REVERB_ROOM_ROLLOFF_FACTOR, reverb->flRoomRolloffFactor);
		palEffecti(effect, AL_REVERB_DECAY_HFLIMIT, reverb->iDecayHFLimit);
	}
#endif
	return effect;
}

static qboolean QDECL OpenAL_InitCard(soundcardinfo_t *sc, const char *devname)
{
	oalinfo_t *oali;
#ifndef OPENAL_STATIC
	//no default support, because we're buggy as fuck
	if (!devname)
		return false;
#endif

	if (!devname || !*devname)
		devname = palcGetString(NULL, ALC_DEFAULT_DEVICE_SPECIFIER);

	Con_Printf("Initiating OpenAL: %s.\n", devname);

	if (OpenAL_Init(sc, devname) == false)
	{
		Con_Printf(CON_ERROR "OpenAL init failed\n");
		return false;
	}
	oali = sc->handle;

	Con_DPrintf("OpenAL AL Extension   : %s\n",palGetString(AL_EXTENSIONS));
	Con_DPrintf("OpenAL ALC Extension  : %s\n",palcGetString(oali->OpenAL_Device,ALC_EXTENSIONS));

	sc->Lock = OpenAL_LockBuffer;
	sc->Unlock = OpenAL_UnlockBuffer;
	sc->SetWaterDistortion = OpenAL_SetUnderWater;
	sc->Submit = OpenAL_Submit;
	sc->Shutdown = OpenAL_Shutdown;
	sc->GetDMAPos = OpenAL_GetDMAPos;
	sc->ChannelUpdate = OpenAL_ChannelUpdate;
	sc->ListenerUpdate = OpenAL_ListenerUpdate;

	Q_snprintfz(sc->name, sizeof(sc->name), "%s", devname);

	sc->inactive_sound = true;
	sc->selfpainting = true;

	Cvar_ForceCallback(&s_al_distancemodel);
	Cvar_ForceCallback(&s_al_speedofsound);
	Cvar_ForceCallback(&s_al_dopplerfactor);
	Cvar_ForceCallback(&s_al_max_distance);

#ifdef USEEFX
	PrintALError("preeffects");
	palSource3i = palGetProcAddress("alSource3i");
	palAuxiliaryEffectSloti = palGetProcAddress("alAuxiliaryEffectSloti");
	palGenAuxiliaryEffectSlots = palGetProcAddress("alGenAuxiliaryEffectSlots");
	palDeleteAuxiliaryEffectSlots = palGetProcAddress("alDeleteAuxiliaryEffectSlots");
	palDeleteEffects = palGetProcAddress("alDeleteEffects");
	palGenEffects = palGetProcAddress("alGenEffects");
	palEffecti = palGetProcAddress("alEffecti");
	palEffectiv = palGetProcAddress("alEffectiv");
	palEffectf = palGetProcAddress("alEffectf");
	palEffectfv = palGetProcAddress("alEffectfv");

	palGenAuxiliaryEffectSlots(1, &oali->effectslot);

	oali->cureffect = 0;
	oali->effecttype[0] = 0;
	{
		EFXEAXREVERBPROPERTIES uw = EFX_REVERB_PRESET_UNDERWATER;
		oali->effecttype[1] = OpenAL_LoadEffect(&uw);
	}
	PrintALError("posteffects");
#endif
	return true;
}

#define SDRVNAME "OpenAL"
static qboolean QDECL OpenAL_Enumerate(void (QDECL *callback)(const char *driver, const char *devicecode, const char *readabledevice))
{
	const char *devnames;
	if (!OpenAL_InitLibrary())
		return true; //enumerate nothing if al is disabled

	devnames = palcGetString(NULL, ALC_ALL_DEVICES_SPECIFIER);
	if (!devnames)
		devnames = palcGetString(NULL, ALC_DEVICE_SPECIFIER);
	while(*devnames)
	{
		callback(SDRVNAME, devnames, va("OAL:%s", devnames));
		devnames += strlen(devnames)+1;
	}
	return true;
}

sounddriver_t OPENAL_Output =
{
	SDRVNAME,
	OpenAL_InitCard,
	OpenAL_Enumerate
};


#if defined(VOICECHAT)

qboolean OpenAL_InitCapture(void)
{
	if (!OpenAL_InitLibrary())
		return false;

	//is there really much point checking for the name when the functions should exist or not regardless?
	//if its not really supported, I would trust the open+enumerate operations to reliably fail. the functions are exported as actual symbols after all, not some hidden driver feature.
	//it doesn't really matter if the default driver supports it, so long as one does, I guess.
	//if (!palcIsExtensionPresent(NULL, "ALC_EXT_capture"))
	//	return false;

	if(!palcCaptureOpenDevice)
	{
		palcGetIntegerv = Sys_GetAddressForName(openallib, "alcGetIntegerv");

		palcCaptureOpenDevice = Sys_GetAddressForName(openallib, "alcCaptureOpenDevice");
		palcCaptureStart = Sys_GetAddressForName(openallib, "alcCaptureStart");
		palcCaptureSamples = Sys_GetAddressForName(openallib, "alcCaptureSamples");
		palcCaptureStop = Sys_GetAddressForName(openallib, "alcCaptureStop");
		palcCaptureCloseDevice = Sys_GetAddressForName(openallib, "alcCaptureCloseDevice");
	}

	return palcGetIntegerv&&palcCaptureOpenDevice&&palcCaptureStart&&palcCaptureSamples&&palcCaptureStop&&palcCaptureCloseDevice;
}
qboolean QDECL OPENAL_Capture_Enumerate (void (QDECL *callback) (const char *drivername, const char *devicecode, const char *readablename))
{
	const char *devnames;
	if (!OpenAL_InitCapture())
		return true; //enumerate nothing if al is disabled

	devnames = palcGetString(NULL, ALC_CAPTURE_DEVICE_SPECIFIER);
	while(*devnames)
	{
		callback(SDRVNAME, devnames, va("OAL:%s", devnames));
		devnames += strlen(devnames)+1;
	}
	return true;
}
//fte's capture api specifies mono 16.
void *QDECL OPENAL_Capture_Init (int samplerate, const char *device)
{
#ifndef OPENAL_STATIC
	if (!device)	//no default devices please, too buggy for that.
		return NULL;
#endif

	if (!OpenAL_InitCapture())
		return NULL; //enumerate nothing if al is disabled

	if (!device || !*device)
		device = palcGetString(NULL, ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER);

	return palcCaptureOpenDevice(device, samplerate, AL_FORMAT_MONO16, 0.5*samplerate);
}
void QDECL OPENAL_Capture_Start (void *ctx)
{
	ALCdevice *device = ctx;
	palcCaptureStart(device);
}
unsigned int QDECL OPENAL_Capture_Update (void *ctx, unsigned char *buffer, unsigned int minbytes, unsigned int maxbytes)
{
#define samplesize sizeof(short)
	ALCdevice *device = ctx;
	int avail = 0;
	palcGetIntegerv(device, ALC_CAPTURE_SAMPLES, sizeof(ALint), &avail);
	if (avail*samplesize < minbytes)
		return 0;	//don't bother grabbing it if its below the threshold.
	palcCaptureSamples(device, (ALCvoid *)buffer, avail);
	return avail * samplesize;
}
void QDECL OPENAL_Capture_Stop (void *ctx)
{
	ALCdevice *device = ctx;
	palcCaptureStop(device);
}
void QDECL OPENAL_Capture_Shutdown (void *ctx)
{
	ALCdevice *device = ctx;
	palcCaptureCloseDevice(device);
}

snd_capture_driver_t OPENAL_Capture =
{
	1,
	SDRVNAME,
	OPENAL_Capture_Enumerate,
	OPENAL_Capture_Init,
	OPENAL_Capture_Start,
	OPENAL_Capture_Update,
	OPENAL_Capture_Stop,
	OPENAL_Capture_Shutdown
};
#endif

#endif