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updated sndfile for racket & for newer version of sndfile & other similar stuff.

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This commit is contained in:
John Clements 2010-08-27 16:41:36 -07:00
parent 3b94602e2e
commit fbd4659260
2 changed files with 48 additions and 23 deletions
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69
collects/ffi/examples/sndfile.rkt
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@ -1,12 +1,17 @@
#lang scheme/base
#lang racket/base
(require mzlib/foreign) (unsafe!)
(require ffi/unsafe)
;; the constants in this file are pulled from version 1.0.21 of the libsndfile header file. However,
;; I think it would be a mistake to specify this in the call to ffi-lib; it appears that
;; this version is a conservative extension of the earlier version (1.0.17?), and I
;; think you'll get graceful failures if the version is wrong.
(define libsndfile (ffi-lib "libsndfile"))
;; ==================== Types etc ====================
;; This is the scheme represtenatation of the soundfile that is handeled by
;; This is the scheme representation of the soundfile that is handled by
;; libsndfile.
;; In libsndfile the sndfile object is represented as a pointer. When
@ -23,8 +28,8 @@
(error '_sndfile "got a NULL pointer (bad info?)")))))
;; sf_count_t is a count type that depends on the operating system however it
;; seems to be a long int for all the supported ones so in this scase we just
;; define it as two ints.
;; seems to be a long int for all the supported ones so in this case we just
;; define it as an int64.
(define _sf-count-t _int64)
(define _sf-mode
@ -37,24 +42,31 @@
(define _sf-format
(let ([majors ; Major formats
'((wav #x010000) ; Microsoft WAV format (little endian)
(aiff #x020000) ; Apple/SGI AIFF format (big endian)
(au #x030000) ; Sun/NeXT AU format (big endian)
(raw #x040000) ; RAW PCM data
(paf #x050000) ; Ensoniq PARIS file format
(svx #x060000) ; Amiga IFF / SVX8 / SV16 format
(nist #x070000) ; Sphere NIST format
(voc #x080000) ; VOC files
(ircam #x0A0000) ; Berkeley/IRCAM/CARL
(w64 #x0B0000) ; Sonic Foundry's 64 bit RIFF/WAV
(mat4 #x0C0000) ; Matlab (tm) V4.2 / GNU Octave 2.0
(mat5 #x0D0000) ; Matlab (tm) V5.0 / GNU Octave 2.1
(pvf #x0E0000) ; Portable Voice Format
(xi #x0F0000) ; Fasttracker 2 Extended Instrument
(htk #x100000) ; HMM Tool Kit format
(sds #x110000) ; Midi Sample Dump Standard
(avr #x120000) ; Audio Visual Research
(wavex #x130000) ; MS WAVE with WAVEFORMATEX
'((wav #x010000) ; Microsoft WAV format (little endian default).
(aiff #x020000) ; Apple/SGI AIFF format (big endian).
(au #x030000) ; Sun/NeXT AU format (big endian).
(raw #x040000) ; RAW PCM data.
(paf #x050000) ; Ensoniq PARIS file format.
(svx #x060000) ; Amiga IFF / SVX8 / SV16 format.
(nist #x070000) ; Sphere NIST format.
(voc #x080000) ; VOC files.
(ircam #x0A0000) ; Berkeley/IRCAM/CARL
(w64 #x0B0000) ; Sonic Foundry's 64 bit RIFF/WAV
(mat4 #x0C0000) ; Matlab (tm) V4.2 / GNU Octave 2.0
(mat5 #x0D0000) ; Matlab (tm) V5.0 / GNU Octave 2.1
(pvf #x0E0000) ; Portable Voice Format
(xi #x0F0000) ; Fasttracker 2 Extended Instrument
(htk #x100000) ; HMM Tool Kit format
(sds #x110000) ; Midi Sample Dump Standard
(avr #x120000) ; Audio Visual Research
(wavex #x130000) ; MS WAVE with WAVEFORMATEX
(sd2 #x160000) ; Sound Designer 2
(flac #x170000) ; FLAC lossless file format
(caf #x180000) ; Core Audio File format
(wve #x190000) ; Psion WVE format
(ogg #x200000) ; Xiph OGG container
(mpc2k #x210000) ; Akai MPC 2000 sampler
(rf64 #x220000) ; RF64 WAV file
)]
[subtypes ; Subtypes from here on
'((pcm-s8 #x0001) ; Signed 8 bit data
@ -64,21 +76,28 @@
(pcm-u8 #x0005) ; Unsigned 8 bit data (WAV and RAW only)
(float #x0006) ; 32 bit float data
(double #x0007) ; 64 bit float data
(ulaw #x0010) ; U-Law encoded
(alaw #x0011) ; A-Law encoded
(ima-adpcm #x0012) ; IMA ADPCM
(ms-adpcm #x0013) ; Microsoft ADPCM
(gsm610 #x0020) ; GSM 6.10 encoding
(vox-adpcm #x0021) ; OKI / Dialogix ADPCM
(g721-32 #x0030) ; 32kbs G721 ADPCM encoding
(g723-24 #x0031) ; 24kbs G723 ADPCM encoding
(g723-40 #x0032) ; 40kbs G723 ADPCM encoding
(dwvw-12 #x0040) ; 12 bit Delta Width Variable Word encoding
(dwvw-16 #x0041) ; 16 bit Delta Width Variable Word encoding
(dwvw-24 #x0042) ; 24 bit Delta Width Variable Word encoding
(dwvw-n #x0043) ; N bit Delta Width Variable Word encoding
(dpcm-8 #x0050) ; 8 bit differential PCM (XI only)
(dpcm-16 #x0051) ; 16 bit differential PCM (XI only)
(vorbis #x0060) ; Xiph Vorbis encoding.
)]
[endians ; Endian-ness options
'((file #x00000000) ; Default file endian-ness
@ -200,6 +219,9 @@
(lambda (x) (sf-set-string sndfile st (cadr x)))]))
str-types))
;; read-sound-internal : string bool -> (or/c (values/c ... wait a second...))
;; read the data from a file.
(define (read-sound-internal file meta?)
(let* ([sndfile (sf-open file 'sfm-read)]
[strings (and meta? (get-strings sndfile))]
@ -294,6 +316,7 @@
(#rx"\\.pvf" (pvf pcm-16 file))
(#rx"\\.sds" (sds pcm-16 file))
(#rx"\\.xi" (xi dpcm-16 file))))
(define (guess-format filename)
(let loop ([xs file-format-table])
(cond [(null? xs) (default-file-format)]

2
collects/ffi/examples/use-sndfile.rkt
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@ -13,6 +13,8 @@
(let loop ([n n] [r '()])
(if (zero? n) r (loop (sub1 n) (cons x r)))))
;; N.B.: this won't work unless you have a file in the current working directory called "x.wav".
;; (the error message could be better, though...)
(let-values ([(data meta) (read-sound* "x.wav")])
(printf ">>> data-length: ~s\n>>> meta: ~s\n" (length data) meta)
(let* ([data data #;