audio.engine initial code dump

db4
Joe Groff 2010-01-18 14:17:04 -08:00
parent 2b96f43929
commit ace167991d
1 changed files with 262 additions and 0 deletions
extra/audio/engine

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