It is my code. It started off life as part of a cd ripper program I
wrote in 2010 in vb6. It was inspired by code provided by Steve McMahon
(st...@vbaccelerator.com) under an Apache style licence. The code has
since been heavily rewritten, translated to vb.net and finally
translated to gambas.
On 2017-07-20 07:16 AM, Shane wrote:
with the code i was trying to adapt you can't
i was getting strange values eg.
a struct size of 208 when it was meant to be 128 and for some strange
reason get end of file
when seeking to eof less header even if i backed up more than the 208
bytes
i can see that tony didn't right it i should of said did he convert it
to gambas ?
i think this should be in the farm ?
On 20/07/17 21:04, Gianluigi wrote:
2017-07-20 12:09 GMT+02:00 Shane <buster6se...@gmail.com>:
yep can't use structs have to do like tony's code works perfect thanks
again tony
mmmmh are you sure?
p.s is this your code ?
No, but you can easily see who wrote it :)
On 20/07/17 19:56, Gianluigi wrote:
Right ... and a look here too [0]
Ciao :)
Gianluigi
[0]
http://www.gambas-it.org/smf/index.php?topic=5794.msg41793#msg41793
2017-07-20 3:15 GMT+02:00 Shane <buster6se...@gmail.com>:
thanks tony sounds like just what i needed i will take a look
cheers
On 19/07/17 22:34, Tony Morehen wrote:
I've attached an archive containing the code I use to read v1 and
v2 MP3
tags and other MP3 info including bitrates (fixed and VBR), sampling
rates
and number of channels. v1 tags are pretty staightforward to
read if
you
don't try to read the structure directly, but by each element of the
structure at a time. Some tips:
1) Numeric elements (bytes, bytearrays, shorts, integers, longs)
can be
read directly from the stream. ie (4 byte Integer) = Read
#Stream As
Integer. Gambas can handle little endian/big endian issues.
2) Fixed length strings must be handled in a two stage process.
First,
the required string length number of bytes is read into a byte
array.
This
byte array is then converted to a string. Sample code:
Dim Bytes As New Byte[StringLength]
Bytes.Read(Stream)
FixedString = Bytes.ToString()
Note: Bytes.ToString stops the string conversion at the first
null or at
the end of the array. Therfore, you don't have to worry about
null-terminated strings.
v2 tags are more complicated, particularly since the tags can be
ascii,
either kind of utf16, or utf8 encoding. The code I sent has been
tested
with over 10,000 mp3 files has seems to have no issues.
On 2017-07-19 12:33 AM, Shane wrote:
thank you Gian i did take a rest and read but alas it did not help
as far as i see it he is saying don't use binary file for fixed
length
strings
but as this is an mp3 file tag witch i have no control i am doomed
On 18/07/17 19:22, Gianluigi wrote:
Why do not you take a moment of rest and read what Tobias Boege
recommend
me in the discussion [0] I told you here [1]?
[0]
http://gambas.8142.n7.nabble.com/Random-access-files-with-fi
xed-length-string-td50880.html
[1] http://gambas.8142.n7.nabble.com/vb-code-td59764.html
2017-07-18 9:04 GMT+02:00 Shane <buster6se...@gmail.com>:
I am very confused from the docs
_Variable_ *= READ* [ *#* _Stream_ ] *AS* _Datatype_
_Variable_ *= READ* [ *#* _Stream_ *,* ] _Length_
so wouldn't it be_
_
IDtag = read #hfile as ID3v1_TAG ?
with doesn't work by the way
On 18/07/17 12:44, nand...@nothingsimple.com wrote:
I think
Read #hfile, IDtag, ID3v1_TAG
should be
Read #hfile, IDtag as ID3v1_TAG
--
Open WebMail Project (http://openwebmail.org)
---------- Original Message -----------
From: Shane <buster6se...@gmail.com>
To: gambas-user@lists.sourceforge.net
Sent: Tue, 18 Jul 2017 10:50:43 +1000
Subject: Re: [Gambas-user] reading files
i don't know what i am doing wrong
Public Struct ID3v1_TAG '(128 bytes)
Tag[3] As String 'always TAG
Title[30] As String 'title, 30 characters
Artist[30] As String 'artist, 30 characters
Album[30] As String 'album, 30 characters
Year[4] As String 'year, 4 characters
Comment[30] As String 'comment, 30 characters (or
28 if
track# included)
Genre As Byte 'genre, 255 for none
defined
End Struct
Private Sub GetID3v1(File As String)
Dim IDtag As ID3v1_TAG
Dim hfile As File
hfile = Open File For Read
'
'read the tag
' seek to end of less tag size
Read #hfile, IDtag, ID3v1_TAG
here i get IDtag is NULL
On 18/07/17 05:05, nand...@nothingsimple.com wrote:
Yes it is possible, I do it. here is some code (incomplete)
-Nando (Canada)
' top of class file
Public Struct recstruc
_a as integer
_b as integer
_c as integer
end struct
' a function
public function openAfile(filename as string) as file
dim hfile as file
dim arec as recstruc
hfile = open filename for read write create
with arec 'some values to write.
._a = 1
._b = 22
._c = 333
end with
write #hfile, arec as recstruc
'if you position the hfile pointer back to zero, you can...
read #hfile, arec as recstruc
close #hfile
end
--
Open WebMail Project (http://openwebmail.org)
---------- Original Message -----------
From: T Lee Davidson <t.lee.david...@gmail.com>
To: gambas-user@lists.sourceforge.net
Sent: Sun, 16 Jul 2017 12:42:35 -0400
Subject: Re: [Gambas-user] reading files
On 07/16/2017 06:57 AM, Shane wrote:
given this example
PRIVATE SUB BinaryRead(FilePath AS String)
DIM binaryFile AS File
DIM i AS Integer
DIM b AS Byte
DIM s AS Short
DIM s1 AS String
DIM s2 AS String
' Read binary file
binaryFile = OPEN FilePath FOR READ
READ #binaryFile, i
READ #binaryFile, b
READ #binaryFile, s
READ #binaryFile, s1
READ #binaryFile, s2
CLOSE #binaryFile
' Display results
PRINT i
PRINT b
PRINT s
PRINT s1
PRINT s2
END
is there a way for gambas to read a struct of all these
variables
in one read ?
You may have hinted at the solution within your question.
Have
you
considered
using a Structure?
http://gambaswiki.org/wiki/lang/read :
"... reads the stream Stream as binary data whose type is
specified by
the
Datatype argument."
"The returned datatype can be one of the following: NULL,
Boolean,
Byte, Short,
Integer, Long, Pointer, Single, Float, Date, String,
Variant,
any
Array,
Collection or structure."
http://gambaswiki.org/wiki/lang/structdecl
--
Lee
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