OpenAL32/Include/alSource.h

   1 #ifndef _AL_SOURCE_H_
   2 #define _AL_SOURCE_H_
   3
   4 #define MAX_SENDS                 4
   5
   6 #include "alMain.h"
   7 #include "alu.h"
   8 #include "hrtf.h"
   9
  10 #ifdef __cplusplus
  11 extern "C" {
  12 #endif
  13
  14 extern enum Resampler DefaultResampler;
  15
  16 extern const ALsizei ResamplerPadding[ResamplerMax];
  17 extern const ALsizei ResamplerPrePadding[ResamplerMax];
  18
  19
  20 typedef struct ALbufferlistitem {
  21     struct ALbuffer         *buffer;
  22     struct ALbufferlistitem *next;
  23     struct ALbufferlistitem *prev;
  24 } ALbufferlistitem;
  25
  26
  27 typedef struct ALactivesource {
  28     struct ALsource *Source;
  29
  30     /** Method to update mixing parameters. */
  31     ALvoid (*Update)(struct ALactivesource *self, const ALCcontext *context);
  32
  33     /** Current target parameters used for mixing. */
  34     ResamplerFunc Resample;
  35     MixerFunc Mix;
  36     HrtfMixerFunc HrtfMix;
  37
  38     ALboolean IsHrtf;
  39     ALint Step;
  40
  41     ALuint Offset; /* Number of output samples mixed since starting. */
  42
  43     DirectParams Direct;
  44     SendParams Send[MAX_SENDS];
  45 } ALactivesource;
  46
  47
  48 typedef struct ALsource {
  49     /** Source properties. */
  50     volatile ALfloat   Pitch;
  51     volatile ALfloat   Gain;
  52     volatile ALfloat   OuterGain;
  53     volatile ALfloat   MinGain;
  54     volatile ALfloat   MaxGain;
  55     volatile ALfloat   InnerAngle;
  56     volatile ALfloat   OuterAngle;
  57     volatile ALfloat   RefDistance;
  58     volatile ALfloat   MaxDistance;
  59     volatile ALfloat   RollOffFactor;
  60     volatile ALfloat   Position[3];
  61     volatile ALfloat   Velocity[3];
  62     volatile ALfloat   Orientation[3];
  63     volatile ALboolean HeadRelative;
  64     volatile ALboolean Looping;
  65     volatile enum DistanceModel DistanceModel;
  66     volatile ALboolean DirectChannels;
  67
  68     volatile ALboolean DryGainHFAuto;
  69     volatile ALboolean WetGainAuto;
  70     volatile ALboolean WetGainHFAuto;
  71     volatile ALfloat   OuterGainHF;
  72
  73     volatile ALfloat AirAbsorptionFactor;
  74     volatile ALfloat RoomRolloffFactor;
  75     volatile ALfloat DopplerFactor;
  76
  77     enum Resampler Resampler;
  78
  79     /**
  80      * Last user-specified offset, and the offset type (bytes, samples, or
  81      * seconds).
  82      */
  83     ALdouble Offset;
  84     ALenum   OffsetType;
  85
  86     /** Source type (static, streaming, or undetermined) */
  87     volatile ALint SourceType;
  88
  89     /** Source state (initial, playing, paused, or stopped) */
  90     volatile ALenum state;
  91     ALenum new_state;
  92
  93     /**
  94      * Source offset in samples, relative to the currently playing buffer, NOT
  95      * the whole queue, and the fractional (fixed-point) offset to the next
  96      * sample.
  97      */
  98     ALuint position;
  99     ALuint position_fraction;
 100
 101     /** Source Buffer Queue info. */
 102     ALbufferlistitem *volatile queue;
 103     ALbufferlistitem *volatile current_buffer;
 104     RWLock queue_lock;
 105
 106     /** Current buffer sample info. */
 107     ALuint NumChannels;
 108     ALuint SampleSize;
 109
 110     /** Direct filter and auxiliary send info. */
 111     struct {
 112         ALfloat Gain;
 113         ALfloat GainHF;
 114         ALfloat HFReference;
 115         ALfloat GainLF;
 116         ALfloat LFReference;
 117     } Direct;
 118     struct {
 119         struct ALeffectslot *Slot;
 120         ALfloat Gain;
 121         ALfloat GainHF;
 122         ALfloat HFReference;
 123         ALfloat GainLF;
 124         ALfloat LFReference;
 125     } Send[MAX_SENDS];
 126
 127     /** Source needs to update its mixing parameters. */
 128     volatile ALenum NeedsUpdate;
 129
 130     /** Self ID */
 131     ALuint id;
 132 } ALsource;
 133
 134 inline struct ALsource *LookupSource(ALCcontext *context, ALuint id)
 135 { return (struct ALsource*)LookupUIntMapKey(&context->SourceMap, id); }
 136 inline struct ALsource *RemoveSource(ALCcontext *context, ALuint id)
 137 { return (struct ALsource*)RemoveUIntMapKey(&context->SourceMap, id); }
 138
 139 ALvoid SetSourceState(ALsource *Source, ALCcontext *Context, ALenum state);
 140 ALboolean ApplyOffset(ALsource *Source);
 141
 142 ALvoid ReleaseALSources(ALCcontext *Context);
 143
 144 #ifdef __cplusplus
 145 }
 146 #endif
 147
 148 #endif