1 ! Copyright (C) 2008 Alex Chapman
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: accessors alien.c-types combinators kernel locals math
4 math.ranges openal sequences sequences.merged specialized-arrays ;
5 SPECIALIZED-ARRAY: uchar
6 SPECIALIZED-ARRAY: short
9 TUPLE: buffer sample-freq 8bit? id ;
11 : <buffer> ( sample-freq 8bit? -- buffer )
14 TUPLE: mono-buffer < buffer data ;
16 : <mono-buffer> ( sample-freq 8bit? -- buffer )
19 : <8bit-mono-buffer> ( sample-freq -- buffer ) t <mono-buffer> ;
20 : <16bit-mono-buffer> ( sample-freq -- buffer ) f <mono-buffer> ;
22 TUPLE: stereo-buffer < buffer left-data right-data ;
24 : <stereo-buffer> ( sample-freq 8bit? -- buffer )
25 f f f stereo-buffer boa ;
27 : <8bit-stereo-buffer> ( sample-freq -- buffer ) t <stereo-buffer> ;
28 : <16bit-stereo-buffer> ( sample-freq -- buffer ) f <stereo-buffer> ;
30 PREDICATE: 8bit-buffer < buffer 8bit?>> ;
31 PREDICATE: 16bit-buffer < buffer 8bit?>> not ;
32 INTERSECTION: 8bit-mono-buffer 8bit-buffer mono-buffer ;
33 INTERSECTION: 16bit-mono-buffer 16bit-buffer mono-buffer ;
34 INTERSECTION: 8bit-stereo-buffer 8bit-buffer stereo-buffer ;
35 INTERSECTION: 16bit-stereo-buffer 16bit-buffer stereo-buffer ;
37 GENERIC: buffer-format ( buffer -- format )
38 M: 8bit-mono-buffer buffer-format drop AL_FORMAT_MONO8 ;
39 M: 16bit-mono-buffer buffer-format drop AL_FORMAT_MONO16 ;
40 M: 8bit-stereo-buffer buffer-format drop AL_FORMAT_STEREO8 ;
41 M: 16bit-stereo-buffer buffer-format drop AL_FORMAT_STEREO16 ;
43 : 8bit-buffer-data ( seq -- data size )
44 [ 128 * >integer 128 + ] uchar-array{ } map-as [ underlying>> ] [ length ] bi ;
46 : 16bit-buffer-data ( seq -- data size )
47 [ 32768 * >integer ] short-array{ } map-as [ underlying>> ] [ byte-length ] bi ;
49 : stereo-data ( stereo-buffer -- left right )
50 [ left-data>> ] [ right-data>> ] bi@ ;
52 : interleaved-stereo-data ( stereo-buffer -- data )
53 stereo-data <2merged> ;
55 GENERIC: buffer-data ( buffer -- data size )
56 M: 8bit-mono-buffer buffer-data data>> 8bit-buffer-data ;
57 M: 16bit-mono-buffer buffer-data data>> 16bit-buffer-data ;
58 M: 8bit-stereo-buffer buffer-data
59 interleaved-stereo-data 8bit-buffer-data ;
60 M: 16bit-stereo-buffer buffer-data
61 interleaved-stereo-data 16bit-buffer-data ;
63 CONSTANT: telephone-sample-freq 8000
64 CONSTANT: half-sample-freq 22050
65 CONSTANT: cd-sample-freq 44100
66 CONSTANT: digital-sample-freq 48000
67 CONSTANT: professional-sample-freq 88200
69 : send-buffer ( buffer -- buffer )
71 [ gen-buffer dup [ >>id ] dip ]
74 [ sample-freq>> alBufferData ]
77 : ?send-buffer ( buffer -- buffer )
78 dup id>> [ send-buffer ] unless ;