b9e192b78a
This is essentially a 12-point sinc resampler, unless it's resampling to a rate higher than the output, at which point it will vary between 12 and 24 points and do anti-aliasing to avoid/reduce frequencies going over nyquist. Code provided by Christopher Fitzgerald.
149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
#ifndef _AL_SOURCE_H_
|
|
#define _AL_SOURCE_H_
|
|
|
|
#define MAX_SENDS 4
|
|
|
|
#include "alMain.h"
|
|
#include "alu.h"
|
|
#include "hrtf.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
struct ALbuffer;
|
|
struct ALsource;
|
|
|
|
|
|
typedef struct ALbufferlistitem {
|
|
struct ALbuffer *buffer;
|
|
struct ALbufferlistitem *volatile next;
|
|
struct ALbufferlistitem *volatile prev;
|
|
} ALbufferlistitem;
|
|
|
|
|
|
typedef struct ALvoice {
|
|
struct ALsource *volatile Source;
|
|
|
|
/** Method to update mixing parameters. */
|
|
ALvoid (*Update)(struct ALvoice *self, const struct ALsource *source, const ALCcontext *context);
|
|
|
|
/** Current target parameters used for mixing. */
|
|
ALint Step;
|
|
|
|
ALboolean IsHrtf;
|
|
|
|
ALuint Offset; /* Number of output samples mixed since starting. */
|
|
|
|
alignas(16) ALfloat PrevSamples[MAX_INPUT_CHANNELS][MAX_PRE_SAMPLES];
|
|
|
|
BsincState SincState;
|
|
|
|
DirectParams Direct;
|
|
SendParams Send[MAX_SENDS];
|
|
} ALvoice;
|
|
|
|
|
|
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;
|
|
aluVector Position;
|
|
aluVector Velocity;
|
|
aluVector Direction;
|
|
volatile ALfloat Orientation[2][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;
|
|
|
|
volatile ALfloat Radius;
|
|
|
|
/**
|
|
* 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. */
|
|
ATOMIC(ALbufferlistitem*) queue;
|
|
ATOMIC(ALbufferlistitem*) current_buffer;
|
|
RWLock queue_lock;
|
|
|
|
/** Current buffer sample info. */
|
|
ALuint NumChannels;
|
|
ALuint SampleSize;
|
|
|
|
/** Direct filter and auxiliary send info. */
|
|
struct {
|
|
ALfloat Gain;
|
|
ALfloat GainHF;
|
|
ALfloat HFReference;
|
|
ALfloat GainLF;
|
|
ALfloat LFReference;
|
|
} Direct;
|
|
struct {
|
|
struct ALeffectslot *Slot;
|
|
ALfloat Gain;
|
|
ALfloat GainHF;
|
|
ALfloat HFReference;
|
|
ALfloat GainLF;
|
|
ALfloat LFReference;
|
|
} Send[MAX_SENDS];
|
|
|
|
/** Source needs to update its mixing parameters. */
|
|
ATOMIC(ALenum) NeedsUpdate;
|
|
|
|
/** Self ID */
|
|
ALuint id;
|
|
} ALsource;
|
|
|
|
inline struct ALsource *LookupSource(ALCcontext *context, ALuint id)
|
|
{ return (struct ALsource*)LookupUIntMapKey(&context->SourceMap, id); }
|
|
inline struct ALsource *RemoveSource(ALCcontext *context, ALuint id)
|
|
{ return (struct ALsource*)RemoveUIntMapKey(&context->SourceMap, id); }
|
|
|
|
ALvoid SetSourceState(ALsource *Source, ALCcontext *Context, ALenum state);
|
|
ALboolean ApplyOffset(ALsource *Source);
|
|
|
|
ALvoid ReleaseALSources(ALCcontext *Context);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|