Chris Robinson
5736bbc3e4
With virtualization disabled, channels are mapped directly from input to output and any input channel that is missing an output is dropped. Any virtualization effects (such as HRTF filters) for positional cues are also skipped. The idea is to allow applications a way to play pre-filtered audio that channel vitualization effects could interfere with.
132 lines
3.1 KiB
C
132 lines
3.1 KiB
C
#ifndef _AL_SOURCE_H_
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#define _AL_SOURCE_H_
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#define MAX_SENDS 4
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#include "alFilter.h"
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#include "alu.h"
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#include "AL/al.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define SRC_HISTORY_BITS (6)
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#define SRC_HISTORY_LENGTH (1<<SRC_HISTORY_BITS)
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#define SRC_HISTORY_MASK (SRC_HISTORY_LENGTH-1)
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extern resampler_t DefaultResampler;
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extern const ALsizei ResamplerPadding[RESAMPLER_MAX];
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extern const ALsizei ResamplerPrePadding[RESAMPLER_MAX];
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typedef struct ALbufferlistitem
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{
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struct ALbuffer *buffer;
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struct ALbufferlistitem *next;
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struct ALbufferlistitem *prev;
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} ALbufferlistitem;
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typedef struct ALsource
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{
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ALfloat flPitch;
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ALfloat flGain;
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ALfloat flOuterGain;
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ALfloat flMinGain;
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ALfloat flMaxGain;
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ALfloat flInnerAngle;
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ALfloat flOuterAngle;
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ALfloat flRefDistance;
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ALfloat flMaxDistance;
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ALfloat flRollOffFactor;
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ALfloat vPosition[3];
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ALfloat vVelocity[3];
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ALfloat vOrientation[3];
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ALboolean bHeadRelative;
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ALboolean bLooping;
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ALenum DistanceModel;
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ALboolean VirtualChannels;
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resampler_t Resampler;
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ALenum state;
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ALuint position;
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ALuint position_fraction;
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struct ALbuffer *Buffer;
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ALbufferlistitem *queue; // Linked list of buffers in queue
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ALuint BuffersInQueue; // Number of buffers in queue
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ALuint BuffersPlayed; // Number of buffers played on this loop
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ALfilter DirectFilter;
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struct {
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struct ALeffectslot *Slot;
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ALfilter WetFilter;
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} Send[MAX_SENDS];
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ALboolean DryGainHFAuto;
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ALboolean WetGainAuto;
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ALboolean WetGainHFAuto;
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ALfloat OuterGainHF;
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ALfloat AirAbsorptionFactor;
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ALfloat RoomRolloffFactor;
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ALfloat DopplerFactor;
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ALint lOffset;
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ALint lOffsetType;
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// Source Type (Static, Streaming, or Undetermined)
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ALint lSourceType;
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ALuint NumChannels;
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ALuint SampleSize;
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/* HRTF info */
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ALfloat HrtfHistory[MAXCHANNELS][SRC_HISTORY_LENGTH];
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ALfloat HrtfValues[MAXCHANNELS][HRIR_LENGTH][2];
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ALuint HrtfOffset;
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/* Current target parameters used for mixing */
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struct {
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MixerFunc DoMix;
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ALint Step;
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ALfloat HrtfCoeffs[MAXCHANNELS][HRIR_LENGTH][2];
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ALuint HrtfDelay[MAXCHANNELS][2];
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/* A mixing matrix. First subscript is the channel number of the input
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* data (regardless of channel configuration) and the second is the
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* channel target (eg. FRONT_LEFT) */
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ALfloat DryGains[MAXCHANNELS][MAXCHANNELS];
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FILTER iirFilter;
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ALfloat history[MAXCHANNELS*2];
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struct {
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ALfloat WetGain;
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FILTER iirFilter;
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ALfloat history[MAXCHANNELS];
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} Send[MAX_SENDS];
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} Params;
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ALboolean NeedsUpdate;
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ALvoid (*Update)(struct ALsource *self, const ALCcontext *context);
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// Index to itself
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ALuint source;
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} ALsource;
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#define ALsource_Update(s,a) ((s)->Update(s,a))
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ALvoid ReleaseALSources(ALCcontext *Context);
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#ifdef __cplusplus
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}
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#endif
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#endif
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