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#ifndef _AL_SOURCE_H_
#define _AL_SOURCE_H_
#define MAX_SENDS 4
#include "alFilter.h"
#include "alu.h"
#include "AL/al.h"
#ifdef __cplusplus
extern "C" {
#endif
#define SRC_HISTORY_BITS (6)
#define SRC_HISTORY_LENGTH (1<<SRC_HISTORY_BITS)
#define SRC_HISTORY_MASK (SRC_HISTORY_LENGTH-1)
extern enum Resampler DefaultResampler;
extern const ALsizei ResamplerPadding[ResamplerMax];
extern const ALsizei ResamplerPrePadding[ResamplerMax];
typedef struct ALbufferlistitem
{
struct ALbuffer *buffer;
struct ALbufferlistitem *next;
struct ALbufferlistitem *prev;
} ALbufferlistitem;
typedef struct HrtfState {
ALboolean Moving;
ALuint Counter;
ALIGN(16) ALfloat History[MaxChannels][SRC_HISTORY_LENGTH];
ALIGN(16) ALfloat Values[MaxChannels][HRIR_LENGTH][2];
ALuint Offset;
} HrtfState;
typedef struct HrtfParams {
ALfloat Gain;
ALfloat Dir[3];
ALIGN(16) ALfloat Coeffs[MaxChannels][HRIR_LENGTH][2];
ALIGN(16) ALfloat CoeffStep[HRIR_LENGTH][2];
ALuint Delay[MaxChannels][2];
ALint DelayStep[2];
} HrtfParams;
typedef struct DirectParams {
HrtfParams Hrtf;
/* A mixing matrix. First subscript is the channel number of the input data
* (regardless of channel configuration) and the second is the channel
* target (eg. FrontLeft). Not used with HRTF. */
ALfloat Gains[MaxChannels][MaxChannels];
/* A low-pass filter, using 2 chained one-pole filters. */
FILTER iirFilter;
ALfloat history[MaxChannels*2];
} DirectParams;
typedef struct SendParams {
/* Gain control, which applies to all input channels to a single (mono)
* output buffer. */
ALfloat Gain;
/* A low-pass filter, using 2 chained one-pole filters. */
FILTER iirFilter;
ALfloat history[MaxChannels*2];
} SendParams;
typedef struct ALsource
{
/** Source properties. */
volatile ALfloat Pitch;
volatile ALfloat Gain;
volatile ALfloat OuterGain;
volatile ALfloat MinGain;
volatile ALfloat MaxGain;
volatile ALfloat InnerAngle;
volatile ALfloat OuterAngle;
volatile ALfloat RefDistance;
volatile ALfloat MaxDistance;
volatile ALfloat RollOffFactor;
volatile ALfloat Position[3];
volatile ALfloat Velocity[3];
volatile ALfloat Orientation[3];
volatile ALboolean HeadRelative;
volatile ALboolean Looping;
volatile enum DistanceModel DistanceModel;
volatile ALboolean DirectChannels;
volatile ALboolean DryGainHFAuto;
volatile ALboolean WetGainAuto;
volatile ALboolean WetGainHFAuto;
volatile ALfloat OuterGainHF;
volatile ALfloat AirAbsorptionFactor;
volatile ALfloat RoomRolloffFactor;
volatile ALfloat DopplerFactor;
enum Resampler Resampler;
/**
* Last user-specified offset, and the offset type (bytes, samples, or
* seconds).
*/
ALdouble Offset;
ALenum OffsetType;
/** Source type (static, streaming, or undetermined) */
volatile ALint SourceType;
/** Source state (initial, playing, paused, or stopped) */
volatile ALenum state;
ALenum new_state;
/**
* Source offset in samples, relative to the currently playing buffer, NOT
* the whole queue, and the fractional (fixed-point) offset to the next
* sample.
*/
ALuint position;
ALuint position_fraction;
/** Source Buffer Queue info. */
ALbufferlistitem *queue;
ALuint BuffersInQueue;
ALuint BuffersPlayed;
/** Current buffer sample info. */
ALuint NumChannels;
ALuint SampleSize;
/** Direct filter and auxiliary send info. */
ALfloat DirectGain;
ALfloat DirectGainHF;
struct {
struct ALeffectslot *Slot;
ALfloat Gain;
ALfloat GainHF;
} Send[MAX_SENDS];
/** HRTF info. */
HrtfState Hrtf;
/** Current target parameters used for mixing. */
struct {
DryMixerFunc DryMix;
WetMixerFunc WetMix;
ALint Step;
DirectParams Direct;
struct ALeffectslot *Slot[MAX_SENDS];
SendParams Send[MAX_SENDS];
} Params;
/** Source needs to update its mixing parameters. */
volatile ALenum NeedsUpdate;
/** Method to update mixing parameters. */
ALvoid (*Update)(struct ALsource *self, const ALCcontext *context);
/** Self ID */
ALuint id;
} ALsource;
#define ALsource_Update(s,a) ((s)->Update(s,a))
ALvoid SetSourceState(ALsource *Source, ALCcontext *Context, ALenum state);
ALboolean ApplyOffset(ALsource *Source);
ALvoid ReleaseALSources(ALCcontext *Context);
#ifdef __cplusplus
}
#endif
#endif
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