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     ALint Step;
  35
  36     ALboolean IsHrtf;
  37
  38     ALuint Offset; /* Number of output samples mixed since starting. */
  39
  40     DirectParams Direct;
  41     SendParams Send[MAX_SENDS];
  42 } ALactivesource;
  43
  44
  45 typedef struct ALsource {
  46     /** Source properties. */
  47     volatile ALfloat   Pitch;
  48     volatile ALfloat   Gain;
  49     volatile ALfloat   OuterGain;
  50     volatile ALfloat   MinGain;
  51     volatile ALfloat   MaxGain;
  52     volatile ALfloat   InnerAngle;
  53     volatile ALfloat   OuterAngle;
  54     volatile ALfloat   RefDistance;
  55     volatile ALfloat   MaxDistance;
  56     volatile ALfloat   RollOffFactor;
  57     volatile ALfloat   Position[3];
  58     volatile ALfloat   Velocity[3];
  59     volatile ALfloat   Orientation[3];
  60     volatile ALboolean HeadRelative;
  61     volatile ALboolean Looping;
  62     volatile enum DistanceModel DistanceModel;
  63     volatile ALboolean DirectChannels;
  64
  65     volatile ALboolean DryGainHFAuto;
  66     volatile ALboolean WetGainAuto;
  67     volatile ALboolean WetGainHFAuto;
  68     volatile ALfloat   OuterGainHF;
  69
  70     volatile ALfloat AirAbsorptionFactor;
  71     volatile ALfloat RoomRolloffFactor;
  72     volatile ALfloat DopplerFactor;
  73
  74     enum Resampler Resampler;
  75
  76     /**
  77      * Last user-specified offset, and the offset type (bytes, samples, or
  78      * seconds).
  79      */
  80     ALdouble Offset;
  81     ALenum   OffsetType;
  82
  83     /** Source type (static, streaming, or undetermined) */
  84     volatile ALint SourceType;
  85
  86     /** Source state (initial, playing, paused, or stopped) */
  87     volatile ALenum state;
  88     ALenum new_state;
  89
  90     /**
  91      * Source offset in samples, relative to the currently playing buffer, NOT
  92      * the whole queue, and the fractional (fixed-point) offset to the next
  93      * sample.
  94      */
  95     ALuint position;
  96     ALuint position_fraction;
  97
  98     /** Source Buffer Queue info. */
  99     ALbufferlistitem *volatile queue;
 100     ALbufferlistitem *volatile current_buffer;
 101     RWLock queue_lock;
 102
 103     /** Current buffer sample info. */
 104     ALuint NumChannels;
 105     ALuint SampleSize;
 106
 107     /** Direct filter and auxiliary send info. */
 108     struct {
 109         ALfloat Gain;
 110         ALfloat GainHF;
 111         ALfloat HFReference;
 112         ALfloat GainLF;
 113         ALfloat LFReference;
 114     } Direct;
 115     struct {
 116         struct ALeffectslot *Slot;
 117         ALfloat Gain;
 118         ALfloat GainHF;
 119         ALfloat HFReference;
 120         ALfloat GainLF;
 121         ALfloat LFReference;
 122     } Send[MAX_SENDS];
 123
 124     /** Source needs to update its mixing parameters. */
 125     volatile ALenum NeedsUpdate;
 126
 127     /** Self ID */
 128     ALuint id;
 129 } ALsource;
 130
 131 inline struct ALsource *LookupSource(ALCcontext *context, ALuint id)
 132 { return (struct ALsource*)LookupUIntMapKey(&context->SourceMap, id); }
 133 inline struct ALsource *RemoveSource(ALCcontext *context, ALuint id)
 134 { return (struct ALsource*)RemoveUIntMapKey(&context->SourceMap, id); }
 135
 136 ALvoid SetSourceState(ALsource *Source, ALCcontext *Context, ALenum state);
 137 ALboolean ApplyOffset(ALsource *Source);
 138
 139 ALvoid ReleaseALSources(ALCcontext *Context);
 140
 141 #ifdef __cplusplus
 142 }
 143 #endif
 144
 145 #endif