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'From Smalltalk/X, Version:2.6.3 on 25-Mar-1993 at 16:32:03'!
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FileStream subclass:#SoundStream
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instanceVariableNames:'sampleRate numberOfChannels bitsPerSample'
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classVariableNames:'rampOff'
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poolDictionaries:''
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category:'Streams-External'
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!
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SoundStream comment:'
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Interface to audio device.
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Currently works with PD sound-blaster driver and
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sun audio device. On iris default setup is 8 bit mono
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so I can play the standard sound files I have here.
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'!
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%{
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#ifdef IRIS
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# include <audio.h>
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#endif
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%}
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!SoundStream class methodsFor:'instance creation'!
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reading
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|newStream|
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newStream := (self basicNew) initialize.
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newStream openForReading isNil ifTrue:[^nil].
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^ newStream
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"SoundStream reading"
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!
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writing
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|newStream|
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OperatingSystem getCPUType = '386' ifTrue:[
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"soundblaster special kludge to avoid click"
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rampOff isNil ifTrue:[
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self generateRamp
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]
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].
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newStream := (self basicNew) initialize.
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newStream openForWriting isNil ifTrue:[^nil].
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^ newStream
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"SoundStream writing"
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!
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writing16BitStero
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"just an example, has never been tried (I also
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have no samples for this ... leave it as an exercise"
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|newStream|
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OperatingSystem getCPUType = 'irix' ifFalse:[
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self error:'unsupported audio mode'.
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^ nil
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].
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newStream := (self basicNew) initialize.
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newStream bitsPerSample:16.
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newStream numberOfChannels:2.
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newStream openForWriting isNil ifTrue:[^nil].
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^ newStream
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"SoundStream writing16BitStereo"
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! !
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!SoundStream class methodsFor:'default values'!
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defaultSampleRate
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"minimum, supported by all audio systems"
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^ 8000
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!
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defaultBitsPerSample
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"minimum, supported by all audio systems"
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^ 8
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!
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defaultNumberOfChannels
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"minimum, supported by all audio systems"
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^ 1
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!
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defaultMode
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^ #linear "planned is at least uLaw"
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!
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blockSize
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"a good chunk size to read soundstream.
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Some devices may force a specific size ..."
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^ 2048 "about 1/4 of a second"
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! !
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!SoundStream class methodsFor:'conversion tables'!
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uLawToLinear:uLawValue
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"currently unused - but will be"
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^ #(
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"0 " -32256
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"1 " -31228
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"2 " -30200
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"3 " -29172
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"4 " -28143
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"5 " -27115
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"6 " -26087
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"7 " -25059
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"8 " -24031
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"9 " -23002
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"10 " -21974
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"11 " -20946
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"12 " -19918
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"14 " -17861
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"15 " -16833
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"16 " -16062
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"17 " -15548
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"18 " -15033
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"20 " -14005
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"21 " -13491
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"22 " -12977
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"23 " -12463
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"24 " -11949
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"25 " -11435
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"26 " -10920
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"27 " -10406
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"28 " -9892
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"29 " -9378
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"30 " -8864
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"31 " -8350
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"32 " -7964
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"34 " -7450
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"35 " -7193
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"40 " -5908
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"41 " -5651
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"42 " -5394
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"43 " -5137
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"44 " -4880
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"63 " -1988
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"64 " -1891
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"65 " -1827
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"66 " -1763
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"68 " -1634
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"69 " -1570
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"70 " -1506
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"72 " -1377
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"75 " -1184
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"76 " -1120
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"77 " -1056
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"78 " -992
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"79 " -927
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"80 " -879
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"81 " -847
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"82 " -815
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"83 " -783
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"84 " -751
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"85 " -718
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"86 " -686
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"87 " -654
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"88 " -622
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"89 " -590
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"90 " -558
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"91 " -526
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"98 " -341
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"99 " -325
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"100" -309
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"101" -293
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"102" -277
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"103" -261
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"104" -245
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"105" -228
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"106" -212
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"107" -196
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"108" -180
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"109" -164
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"110" -148
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"111" -132
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"112" -120
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"113" -112
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"114" -104
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"115" -96
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"116" -88
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"117" -80
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"118" -72
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"119" -64
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"120" -56
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"121" -48
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"122" -40
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"123" -32
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"124" -24
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"125" -16
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"126" -8
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"127" 0
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"128" 32256
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"129" 31228
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"130" 30200
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"131" 29172
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"132" 28143
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"133" 27115
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"134" 26087
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"135" 25059
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"136" 24031
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"137" 23002
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"138" 21974
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"139" 20946
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"140" 19918
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"141" 18889
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"142" 17861
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"143" 16833
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"144" 16062
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"145" 15548
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"146" 15033
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"147" 14519
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"148" 14005
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"149" 13491
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"150" 12977
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"151" 12463
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"152" 11949
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"153" 11435
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"154" 10920
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"155" 10406
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"156" 9892
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"157" 9378
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"158" 8864
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"159" 8350
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"160" 7964
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"161" 7707
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"162" 7450
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"163" 7193
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"164" 6936
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"165" 6679
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"166" 6422
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"167" 6165
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"168" 5908
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"169" 5651
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"170" 5394
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"171" 5137
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"172" 4880
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"173" 4623
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"174" 4365
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"175" 4108
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"176" 3916
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"177" 3787
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"178" 3659
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"179" 3530
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"180" 3402
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"181" 3273
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"182" 3144
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"183" 3016
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"184" 2887
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"185" 2759
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"186" 2630
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"187" 2502
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"188" 2373
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"189" 2245
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"190" 2116
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"191" 1988
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"192" 1891
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"193" 1827
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"194" 1763
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"195" 1698
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"196" 1634
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"197" 1570
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"198" 1506
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"199" 1441
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"200" 1377
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"201" 1313
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"202" 1249
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"203" 1184
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"204" 1120
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"205" 1056
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"206" 992
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"207" 927
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"208" 879
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"209" 847
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"210" 815
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"211" 783
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"212" 751
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"213" 718
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"214" 686
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"215" 654
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"216" 622
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"217" 590
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"218" 558
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"219" 526
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"220" 494
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"221" 461
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"222" 429
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"223" 397
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"224" 373
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"225" 357
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"226" 341
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"227" 325
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"228" 309
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"229" 293
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"230" 277
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"231" 261
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"232" 245
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"233" 228
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"234" 212
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"235" 196
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"236" 180
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"237" 164
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"238" 148
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"239" 132
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"240" 120
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"241" 112
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"242" 104
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"243" 96
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"244" 88
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"245" 80
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"246" 72
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"247" 64
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"248" 56
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"249" 48
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"250" 40
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"251" 32
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"252" 24
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"253" 16
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"254" 8
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"255" 0
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362 |
) at:(uLawValue + 1)
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363 |
! !
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364 |
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365 |
!SoundStream class methodsFor:'private'!
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366 |
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367 |
generateRamp
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368 |
"create ramp data (need to be played on soundblaster
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369 |
before closing device to prevent audible click-on/off).
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370 |
This method just fills a buffer with ramp data."
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371 |
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|size div|
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373 |
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374 |
size := 256.
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375 |
div := size // 128.
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376 |
rampOff := ByteArray new:size.
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377 |
1 to:size do:[:index |
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378 |
rampOff at:index put:(size - index // div)
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]
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380 |
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381 |
"SoundStream generateRamp"
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382 |
! !
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383 |
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384 |
!SoundStream methodsFor:'mode setting'!
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385 |
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|
386 |
sampleRate:aNumber
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|
387 |
"set the sample rate in hertz - on some
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|
388 |
devices, this is a nop"
|
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|
389 |
|
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|
390 |
OperatingSystem getCPUType = '386' ifTrue:[
|
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|
391 |
"assume sound-blaster device"
|
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|
392 |
"set sound blasters sample rate"
|
|
|
393 |
|
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|
394 |
sampleRate := aNumber.
|
|
|
395 |
self ioctl:1 "DSP_IOCTL_SPEED" with:aNumber
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|
396 |
].
|
|
|
397 |
OperatingSystem getOSType = 'sunos' ifTrue:[
|
|
|
398 |
"audio sample rate is fix"
|
|
|
399 |
^ self "cannot change"
|
|
|
400 |
].
|
|
|
401 |
OperatingSystem getOSType = 'irix' ifTrue:[
|
|
|
402 |
"could change using ALibrary ...for now, it is fix"
|
|
|
403 |
sampleRate := aNumber.
|
|
|
404 |
].
|
|
|
405 |
!
|
|
|
406 |
|
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|
407 |
sampleRate
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|
|
408 |
"return the sample rate"
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|
409 |
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|
410 |
^ sampleRate
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|
|
411 |
!
|
|
|
412 |
|
|
|
413 |
numberOfChannels
|
|
|
414 |
"return the number of channels (1 or 2; usually 1)"
|
|
|
415 |
|
|
|
416 |
^ numberOfChannels
|
|
|
417 |
!
|
|
|
418 |
|
|
|
419 |
numberOfChannels:aNumber
|
|
|
420 |
"set the number of channels"
|
|
|
421 |
|
|
|
422 |
numberOfChannels := aNumber
|
|
|
423 |
!
|
|
|
424 |
|
|
|
425 |
bitsPerSample
|
|
|
426 |
"return the number of bits per sample - usually 8"
|
|
|
427 |
|
|
|
428 |
^ bitsPerSample
|
|
|
429 |
!
|
|
|
430 |
|
|
|
431 |
bitsPerSample:aNumber
|
|
|
432 |
"set the number of bits per sample"
|
|
|
433 |
|
|
|
434 |
bitsPerSample := aNumber
|
|
|
435 |
! !
|
|
|
436 |
|
|
|
437 |
!SoundStream methodsFor:'catching invalid methods'!
|
|
|
438 |
|
|
|
439 |
pathName:filename
|
|
|
440 |
"catch pathname access - its fixed here"
|
|
|
441 |
|
|
|
442 |
self shouldNotImplement
|
|
|
443 |
!
|
|
|
444 |
|
|
|
445 |
pathName:filename in:aDirectory
|
|
|
446 |
"catch pathname access - its fixed here"
|
|
|
447 |
|
|
|
448 |
self shouldNotImplement
|
|
|
449 |
! !
|
|
|
450 |
|
|
|
451 |
!SoundStream methodsFor:'private'!
|
|
|
452 |
|
|
|
453 |
initialize
|
|
|
454 |
"initialize for least common mode"
|
|
|
455 |
|
|
|
456 |
unBuffered := true.
|
|
|
457 |
bitsPerSample := 8.
|
|
|
458 |
numberOfChannels := 1.
|
|
|
459 |
sampleRate := 8000.
|
|
|
460 |
|
|
|
461 |
OperatingSystem getOSType = 'sunos' ifTrue:[
|
|
|
462 |
pathName := '/dev/audio'.
|
|
|
463 |
].
|
|
|
464 |
|
|
|
465 |
OperatingSystem getOSType = 'irix' ifTrue:[
|
|
|
466 |
"no device, use special library calls"
|
|
|
467 |
pathName := nil.
|
|
|
468 |
].
|
|
|
469 |
|
|
|
470 |
OperatingSystem getCPUType = '386' ifTrue:[
|
|
|
471 |
"this code assumes a PD sound-blaster driver .."
|
|
|
472 |
pathName := '/dev/sbdsp'
|
|
|
473 |
]
|
|
|
474 |
! !
|
|
|
475 |
|
|
|
476 |
!SoundStream methodsFor:'redefined'!
|
|
|
477 |
|
|
|
478 |
openWithMode:aMode
|
|
|
479 |
OperatingSystem getOSType = 'irix' ifFalse:[
|
|
|
480 |
"its a regular file open"
|
|
|
481 |
^ super openWithMode:aMode
|
|
|
482 |
].
|
|
|
483 |
|
|
|
484 |
((aMode = 'r') or:[aMode = 'w']) ifFalse:[
|
|
|
485 |
self error:'invalid mode'.
|
|
|
486 |
^ nil
|
|
|
487 |
].
|
|
|
488 |
%{
|
|
|
489 |
#ifdef IRIS
|
|
|
490 |
{
|
|
|
491 |
ALconfig config;
|
|
|
492 |
ALport p;
|
|
|
493 |
long params[] = {
|
|
|
494 |
AL_INPUT_SOURCE, AL_INPUT_MIC,
|
|
|
495 |
AL_INPUT_RATE, 8000,
|
|
|
496 |
AL_OUTPUT_RATE, 8000,
|
|
|
497 |
};
|
|
|
498 |
|
|
|
499 |
config = ALnewconfig();
|
|
|
500 |
if (_INST(numberOfChannels) == _MKSMALLINT(2))
|
|
|
501 |
ALsetchannels(config, AL_STEREO);
|
|
|
502 |
else
|
|
|
503 |
ALsetchannels(config, AL_MONO);
|
|
|
504 |
if (_INST(bitsPerSample) == _MKSMALLINT(16))
|
|
|
505 |
ALsetwidth(config, AL_SAMPLE_16);
|
|
|
506 |
else
|
|
|
507 |
ALsetwidth(config, AL_SAMPLE_8);
|
|
|
508 |
|
|
|
509 |
if (_isSmallInteger(_INST(sampleRate)))
|
|
|
510 |
params[3] = params[5] = _intVal(_INST(sampleRate));
|
|
|
511 |
|
|
|
512 |
ALsetparams(AL_DEFAULT_DEVICE, params, 6);
|
|
|
513 |
p = ALopenport("smallchat", (char *)_stringVal(aMode), config);
|
|
|
514 |
if (p) {
|
|
|
515 |
_INST(filePointer) = _MKSMALLINT((int) p);
|
|
|
516 |
} else {
|
|
|
517 |
_INST(filePointer) = nil;
|
|
|
518 |
RETURN (nil);
|
|
|
519 |
}
|
|
|
520 |
_INST(binary) = true;
|
|
|
521 |
|
|
|
522 |
ALfreeconfig(config);
|
|
|
523 |
/*
|
|
|
524 |
* get the parameters actually installed
|
|
|
525 |
*/
|
|
|
526 |
config = ALgetconfig(p);
|
|
|
527 |
switch (ALgetchannels(config)) {
|
|
|
528 |
default:
|
|
|
529 |
/* cannot happen */
|
|
|
530 |
case AL_MONO:
|
|
|
531 |
_INST(numberOfChannels) = _MKSMALLINT(1);
|
|
|
532 |
break;
|
|
|
533 |
case AL_STEREO:
|
|
|
534 |
_INST(numberOfChannels) = _MKSMALLINT(2);
|
|
|
535 |
break;
|
|
|
536 |
}
|
|
|
537 |
switch (ALgetwidth(config)) {
|
|
|
538 |
default:
|
|
|
539 |
/* cannot happen */
|
|
|
540 |
case AL_SAMPLE_8:
|
|
|
541 |
_INST(bitsPerSample) = _MKSMALLINT(8);
|
|
|
542 |
break;
|
|
|
543 |
case AL_SAMPLE_16:
|
|
|
544 |
_INST(bitsPerSample) = _MKSMALLINT(16);
|
|
|
545 |
break;
|
|
|
546 |
case AL_SAMPLE_24:
|
|
|
547 |
_INST(bitsPerSample) = _MKSMALLINT(24);
|
|
|
548 |
break;
|
|
|
549 |
}
|
|
|
550 |
ALgetparams(AL_DEFAULT_DEVICE, params, 6);
|
|
|
551 |
_INST(sampleRate) = _MKSMALLINT(params[3]);
|
|
|
552 |
|
|
|
553 |
ALfreeconfig(config);
|
|
|
554 |
}
|
|
|
555 |
#endif
|
|
|
556 |
%}
|
|
|
557 |
.
|
|
|
558 |
^ self
|
|
|
559 |
!
|
|
|
560 |
|
|
|
561 |
close
|
|
|
562 |
OperatingSystem getOSType = 'irix' ifTrue:[
|
|
|
563 |
^ self closeFile
|
|
|
564 |
].
|
|
|
565 |
|
|
|
566 |
(mode == #writeonly) ifTrue:[
|
|
|
567 |
"special handling of close on sound blaster,
|
|
|
568 |
turn off voice but continue playing a ramp
|
|
|
569 |
to avoid audible click"
|
|
|
570 |
|
|
|
571 |
OperatingSystem getCPUType = '386' ifTrue:[
|
|
|
572 |
"assume sound-blaster device"
|
|
|
573 |
self ioctl:2 "DSP_IOCTL_VOICE" with:0.
|
|
|
574 |
|
|
|
575 |
"OperatingSystem sleep:3. "
|
|
|
576 |
"add a ramp to zero to prevent click-off"
|
|
|
577 |
super nextPutBytes:(rampOff size) from:rampOff
|
|
|
578 |
]
|
|
|
579 |
].
|
|
|
580 |
super close
|
|
|
581 |
!
|
|
|
582 |
|
|
|
583 |
nextPutBytes:count from:anObject startingAt:start
|
|
|
584 |
"write count bytes from an object starting at index start.
|
|
|
585 |
return the number of bytes written or nil on error.
|
|
|
586 |
Redefined, since IRIS audio library cannot be used with stdio.
|
|
|
587 |
(at least I dont know). Use with ByteArrays only."
|
|
|
588 |
|
|
|
589 |
%{
|
|
|
590 |
#ifdef IRIS
|
|
|
591 |
{
|
|
|
592 |
ALport p;
|
|
|
593 |
int cnt, offs;
|
|
|
594 |
int objSize;
|
|
|
595 |
char *cp;
|
|
|
596 |
|
|
|
597 |
if (_INST(filePointer) != nil) {
|
|
|
598 |
if (_INST(mode) != _readonly) {
|
|
|
599 |
if (_isSmallInteger(count) && _isSmallInteger(start)) {
|
|
|
600 |
cnt = _intVal(count);
|
|
|
601 |
offs = _intVal(start) - 1;
|
|
|
602 |
p = (ALport)(_intVal(_INST(filePointer)));
|
|
|
603 |
|
|
|
604 |
/*
|
|
|
605 |
* compute number of samples
|
|
|
606 |
*/
|
|
|
607 |
objSize = _Size(anObject) - OHDR_SIZE;
|
|
|
608 |
if ( (offs >= 0) && (cnt >= 0) && (objSize >= (cnt + offs)) ) {
|
|
|
609 |
cp = (char *)_InstPtr(anObject) + OHDR_SIZE + offs;
|
|
|
610 |
if (_INST(bitsPerSample) == _MKSMALLINT(16))
|
|
|
611 |
ALwritesamps(p, cp, cnt / 2);
|
|
|
612 |
else
|
|
|
613 |
ALwritesamps(p, cp, cnt);
|
|
|
614 |
RETURN ( _MKSMALLINT(cnt) );
|
|
|
615 |
}
|
|
|
616 |
}
|
|
|
617 |
}
|
|
|
618 |
}
|
|
|
619 |
}
|
|
|
620 |
#endif
|
|
|
621 |
%}
|
|
|
622 |
.
|
|
|
623 |
OperatingSystem getOSType = 'irix' ifFalse:[
|
|
|
624 |
^ super nextPutBytes:count from:anObject startingAt:start
|
|
|
625 |
].
|
|
|
626 |
filePointer isNil ifTrue:[^ self errorNotOpen].
|
|
|
627 |
(mode == #readonly) ifTrue:[^ self errorReadOnly].
|
|
|
628 |
self primitiveFailed
|
|
|
629 |
!
|
|
|
630 |
|
|
|
631 |
nextBytes:count into:anObject startingAt:start
|
|
|
632 |
"read the next count bytes into an object and return the number of
|
|
|
633 |
bytes read or nil on error.
|
|
|
634 |
Use with ByteArrays only."
|
|
|
635 |
|
|
|
636 |
%{
|
|
|
637 |
#ifdef IRIS
|
|
|
638 |
{
|
|
|
639 |
ALport p;
|
|
|
640 |
int cnt, offs;
|
|
|
641 |
int objSize;
|
|
|
642 |
char *cp;
|
|
|
643 |
|
|
|
644 |
if (_INST(filePointer) != nil) {
|
|
|
645 |
if (_INST(mode) != _writeonly) {
|
|
|
646 |
if (_isSmallInteger(count) && _isSmallInteger(start)) {
|
|
|
647 |
cnt = _intVal(count);
|
|
|
648 |
offs = _intVal(start) - 1;
|
|
|
649 |
p = (ALport)(_intVal(_INST(filePointer)));
|
|
|
650 |
objSize = _Size(anObject) - OHDR_SIZE;
|
|
|
651 |
if ((offs >= 0) && (cnt >= 0) && (objSize >= (cnt + offs))) {
|
|
|
652 |
cp = (char *)_InstPtr(anObject) + OHDR_SIZE + offs;
|
|
|
653 |
if (_INST(bitsPerSample) == _MKSMALLINT(16))
|
|
|
654 |
ALreadsamps(p, cp, cnt / 2);
|
|
|
655 |
else
|
|
|
656 |
ALreadsamps(p, cp, cnt);
|
|
|
657 |
RETURN ( _MKSMALLINT(cnt) );
|
|
|
658 |
}
|
|
|
659 |
}
|
|
|
660 |
}
|
|
|
661 |
}
|
|
|
662 |
}
|
|
|
663 |
#endif
|
|
|
664 |
%}
|
|
|
665 |
.
|
|
|
666 |
OperatingSystem getOSType = 'irix' ifFalse:[
|
|
|
667 |
^ super nextPutBytes:count from:anObject startingAt:start
|
|
|
668 |
].
|
|
|
669 |
filePointer isNil ifTrue:[^ self errorNotOpen].
|
|
|
670 |
(mode == #writeonly) ifTrue:[^ self errorWriteOnly].
|
|
|
671 |
self primitiveFailed
|
|
|
672 |
!
|
|
|
673 |
|
|
|
674 |
synchronizeOutput
|
|
|
675 |
"wait until all sound has been played"
|
|
|
676 |
|
|
|
677 |
%{
|
|
|
678 |
#ifdef IRIS
|
|
|
679 |
ALport p;
|
|
|
680 |
|
|
|
681 |
if (_INST(filePointer) != nil) {
|
|
|
682 |
p = (ALport)(_intVal(_INST(filePointer)));
|
|
|
683 |
while (ALgetfilled(p) > 0) {
|
|
|
684 |
sginap(1);
|
|
|
685 |
}
|
|
|
686 |
}
|
|
|
687 |
#endif
|
|
|
688 |
%}
|
|
|
689 |
.
|
|
|
690 |
OperatingSystem getOSType = 'irix' ifFalse:[
|
|
|
691 |
"dont know how to wait"
|
|
|
692 |
].
|
|
|
693 |
^ self
|
|
|
694 |
! !
|
|
|
695 |
|
|
|
696 |
!SoundStream methodsFor:'instance release'!
|
|
|
697 |
|
|
|
698 |
closeFile
|
|
|
699 |
"a stream has been collected - close the file"
|
|
|
700 |
|
|
|
701 |
OperatingSystem getOSType = 'irix' ifFalse:[
|
|
|
702 |
^ super closeFile
|
|
|
703 |
].
|
|
|
704 |
%{
|
|
|
705 |
#ifdef IRIS
|
|
|
706 |
ALcloseport( (ALport) (_intVal(_INST(filePointer))) );
|
|
|
707 |
#endif
|
|
|
708 |
%}
|
|
|
709 |
! !
|
|
|
710 |
|
|
|
711 |
!SoundStream methodsFor:'sine wave generation'!
|
|
|
712 |
|
|
|
713 |
tuneTone
|
|
|
714 |
|buffer numSamples val|
|
|
|
715 |
|
|
|
716 |
"allocate memory for 1sec playing time"
|
|
|
717 |
numSamples := self sampleRate.
|
|
|
718 |
buffer := ByteArray new:numSamples.
|
|
|
719 |
|
|
|
720 |
"fill it with a sine wave"
|
|
|
721 |
|
|
|
722 |
1 to:numSamples do:[:i |
|
|
|
723 |
val := (440 * 2 * (Float pi) * i / numSamples) sin.
|
|
|
724 |
val := val * 127 + 128.
|
|
|
725 |
buffer at:i put:val rounded
|
|
|
726 |
].
|
|
|
727 |
|
|
|
728 |
"play 3 seconds"
|
|
|
729 |
1 to:3 do:[:s |
|
|
|
730 |
self nextPutBytes:numSamples from:buffer
|
|
|
731 |
]
|
|
|
732 |
|
|
|
733 |
"SoundStream writing tuneTone synchronizeOutput close"
|
|
|
734 |
! !
|