audio.engine initial code dump
Joe Groff
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2b96f43929
commit
ace167991d
extra/audio/engine
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USING: accessors alien audio classes.struct
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combinators combinators.short-circuit destructors generalizations
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kernel locals math openal sequences specialized-arrays strings ;
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QUALIFIED-WITH: alien.c-types c
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SPECIALIZED-ARRAYS: c:float c:uchar c:uint ;
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IN: audio.engine
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TUPLE: audio-source
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{ position initial: { 0.0 0.0 0.0 } }
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{ gain float initial: 1.0 }
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{ velocity initial: { 0.0 0.0 0.0 } }
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{ relative? boolean initial: f } ;
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TUPLE: audio-orientation
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{ forward initial: { 0.0 0.0 -1.0 } }
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{ up initial: { 0.0 1.0 0.0 } } ;
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: orientation>float-array ( orientation -- float-array )
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[ forward>> first3 ]
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[ up>> first3 ] bi 6 float-array{ } nsequence ; inline
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TUPLE: audio-listener
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{ position initial: { 0.0 0.0 0.0 } }
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{ gain float initial: 1.0 }
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{ velocity initial: { 0.0 0.0 0.0 } }
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orientation ;
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TUPLE: audio-engine < disposable
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{ device-name string }
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{ voice-count integer }
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{ buffer-size integer }
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{ buffer-count integer }
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{ al-device c-ptr }
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{ al-context c-ptr }
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al-sources
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{ listener audio-listener }
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{ next-source integer }
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clips ;
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TUPLE: audio-clip < disposable
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{ audio-engine audio-engine }
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{ audio audio }
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{ source audio-source }
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{ loop? boolean }
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{ al-source integer }
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{ al-buffers uint-array }
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{ next-data-offset integer } ;
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ERROR: audio-device-not-found device-name ;
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ERROR: audio-context-not-available device-name ;
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:: <audio-engine> ( device-name voice-count buffer-size buffer-count -- engine )
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[
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device-name alcOpenDevice :> al-device
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al-device [ device-name audio-device-not-found ] unless
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al-device |alcCloseDevice* drop
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al-device f alcCreateContext :> al-context
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al-context [ device-name audio-context-not-available ] unless
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al-context |alcDestroyContext drop
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al-context alcSuspendContext
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audio-engine new
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device-name >>device-name
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voice-count >>voice-count
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al-device >>al-device
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al-context >>al-context
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] with-destructors ;
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: <standard-audio-engine> ( -- engine )
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f 16 4096 2 <audio-engine> ;
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<PRIVATE
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: make-engine-current ( audio-engine -- )
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al-context>> alcMakeContextCurrent drop ; inline
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: allocate-sources ( audio-engine -- sources )
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voice-count>> dup (uint-array) [ alGenSources ] keep ; inline
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:: flush-source ( source -- )
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source alSourceStop
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0 c:<uint> :> dummy-buffer
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source AL_BUFFERS_PROCESSED get-source-param [
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source 1 dummy-buffer alSourceUnqueueBuffers
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] times ;
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: free-sources ( sources -- )
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[ length ] keep alDeleteSources ; inline
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:: (get-available-source) ( sources source# stop-source# -- next-source# al-source/f )
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source# sources nth :> al-source
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source# 1 + sources length mod :> next-source#
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al-source {
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[ AL_BUFFERS_PROCESSED get-source-param 0 = ]
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[ AL_BUFFERS_QUEUED get-source-param 0 = ]
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[ AL_SOURCE_STATE get-source-param AL_STOPPED = ]
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} 1&&
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[ next-source# al-source ] [
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next-source# stop-source# =
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[ next-source# f ]
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[ sources next-source# stop-source# (get-available-source) ] if
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] if ;
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:: get-available-source ( audio-engine -- al-source/f )
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audio-engine [ al-sources>> ] [ next-source>> ] bi dup (get-available-source)
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:> ( next-source al-source )
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audio-engine next-source >>next-source drop
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al-source ;
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:: (queue-clip-buffer) ( audio-clip al-buffer audio data size -- )
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al-buffer audio openal-format data size audio sample-rate>> alBufferData
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audio-clip al-source>> 1 al-buffer c:<uint> alSourceQueueBuffers
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audio-clip [ size + ] change-next-data-offset drop ; inline
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:: queue-clip-buffer ( audio-clip al-buffer -- )
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audio-clip audio-engine>> :> audio-engine
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audio-engine buffer-size>> :> buffer-size
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audio-clip audio>> :> audio
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audio-clip next-data-offset>> :> next-data-offset
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audio size>> next-data-offset - :> remaining-audio
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{
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{ [ remaining-audio 0 <= ] [
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audio-clip loop?>> [
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audio-clip 0 >>next-data-offset
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al-buffer queue-clip-buffer
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] when
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] }
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{ [ remaining-audio buffer-size < ] [
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audio-clip loop?>> [
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audio data>>
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[ next-data-offset swap <displaced-alien> remaining-audio <direct-uchar-array> ]
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[ buffer-size remaining-audio - <direct-uchar-array> ] bi append :> data
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audio-clip al-buffer audio data remaining-audio (queue-clip-buffer)
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audio-clip [ audio size>> mod ] change-next-data-offset drop
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] [
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next-data-offset audio data>> <displaced-alien> :> data
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audio-clip al-buffer audio data remaining-audio (queue-clip-buffer)
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] if
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] }
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[
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next-data-offset audio data>> <displaced-alien> :> data
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audio-clip al-buffer audio data buffer-size (queue-clip-buffer)
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]
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} cond ;
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: update-listener ( audio-engine -- )
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listener>> {
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[ AL_POSITION swap position>> first3 alListener3f ]
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[ AL_GAIN swap gain>> alListenerf ]
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[ AL_VELOCITY swap velocity>> first3 alListener3f ]
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[ AL_ORIENTATION swap orientation>> orientation>float-array alListenerfv ]
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} cleave ;
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: update-source ( audio-clip -- )
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[ al-source>> ] [ source>> ] bi {
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[ AL_POSITION swap position>> first3 alSource3f ]
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[ AL_GAIN swap gain>> alSourcef ]
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[ AL_VELOCITY swap velocity>> first3 alSource3f ]
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[ AL_SOURCE_RELATIVE swap relative?>> c:>c-bool alSourcei ]
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} 2cleave ;
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:: update-audio-clip ( audio-clip -- )
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audio-clip update-source
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audio-clip al-source>> :> al-source
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0 c:<uint> :> buffer*
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al-source AL_SOURCE_STATE get-source-param AL_STOPPED =
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[ audio-clip dispose ] [
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al-source AL_BUFFERS_PROCESSED get-source-param [
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al-source 1 buffer* alSourceUnqueueBuffers
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audio-clip buffer* c:*uint queue-clip-buffer
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] times
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] if ;
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PRIVATE>
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DEFER: update-audio
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: start-audio ( audio-engine -- )
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dup al-sources>> [ drop ] [
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{
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[ make-engine-current ]
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[ al-context>> alcProcessContext ]
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[
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dup allocate-sources >>al-sources
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0 >>next-source
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V{ } clone >>clips
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drop
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]
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[ update-audio ]
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} cleave
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] if ;
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: stop-audio ( audio-engine -- )
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dup al-sources>> [
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{
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[ make-engine-current ]
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[ clips>> [ dispose ] each ]
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[ al-sources>> free-sources ]
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[
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f >>al-sources
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f >>clips
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drop
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]
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[ al-context>> alcSuspendContext ]
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} cleave
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] [ drop ] if ;
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M: audio-engine dispose*
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dup stop-audio
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[ [ alcDestroyContext ] when* f ] change-al-context
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[ [ alcCloseDevice* ] when* f ] change-al-device
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drop ;
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:: <audio-clip> ( audio-engine audio source loop? -- audio-clip/f )
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audio-engine get-available-source :> al-source
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al-source [
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audio-engine buffer-count>> :> buffer-count
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buffer-count dup (uint-array) [ alGenBuffers ] keep :> al-buffers
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audio-clip new
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audio-engine >>audio-engine
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audio >>audio
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source >>source
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loop? >>loop?
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al-source >>al-source
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al-buffers >>al-buffers
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0 >>next-data-offset :> clip
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al-buffers [ clip swap queue-clip-buffer ] each
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clip audio-engine clips>> push
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clip
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] [ f ] if ;
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M: audio-clip dispose*
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{
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[ al-source>> flush-source ]
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[ buffer-count>> [ length ] keep alDeleteBuffers ]
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[ dup audio-engine>> clips>> remove! drop ]
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} cleave ;
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: play-clip ( audio-clip -- )
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al-source>> alSourcePlay ;
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: pause-clip ( audio-clip -- )
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al-source>> alSourcePause ;
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: stop-clip ( audio-clip -- )
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dispose ;
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: update-audio ( audio-engine -- )
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{
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[ update-listener ]
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[ clips>> [ update-audio-clip ] each ]
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} cleave ;
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