[Gambas-user] reading files
Gianluigi
bagonergi at ...626...
Wed Jul 19 13:45:19 CEST 2017
You can take a look at our Italian wiki [0][1][2] using Google Translate.
You can also subscribe and ask a question in English, I do not understand
mp3, but there is someone who understands it.
Regards
Gianluigi
[0]
http://www.gambas-it.org/wiki/index.php?title=Estrarre_informazioni_e_TAG_da_un_file_MP3_con_le_sole_funzioni_di_Gambas
[1]
http://www.gambas-it.org/wiki/index.php?title=Guide_della_comunit%C3%A0#Gestione_dei_dati_audio_e_dei_file_audio
[2]
http://www.gambas-it.org/wiki/index.php?title=Guide_della_comunit%C3%A0#Struttur
2017-07-19 6:33 GMT+02:00 Shane <buster6seven at ...626...>:
> 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 <buster6seven at ...626...>:
>>
>> 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, nando_f at ...951... 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 <buster6seven at ...626...>
>>>> To: gambas-user at 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, nando_f at ...951... 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.davidson at ...626...>
>>>>>> To: gambas-user at 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
>>>>>>>
>>>>>>> ------------------------------------------------------------
>>>>>>> ------------------
>>>>>>> Check out the vibrant tech community on one of the world's most
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>>>>>>> https://lists.sourceforge.net/lists/listinfo/gambas-user
>>>>>>>
>>>>>>> ------- End of Original Message -------
>>>>>>
>>>>>>
>>>>>> ------------------------------------------------------------
>>>>>> ------------------
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>>>>>>
>>>>>> ------------------------------------------------------------
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>>>>>
>>>>> ------- End of Original Message -------
>>>>
>>>>
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>
>
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