NewLC - reading file header into a descriptor - Comments

Re: reading file header into a descriptor

miranda2112 — Fri, 05 Aug 2005 07:36:05 +0200

Ok, I've got it working with a .wav file like this:

Code:

_LIT8(KRIFF, "RIFF");

TBuf8<4> header;
fRead.ReadL(header);

if(header.Compare(KRIFF) == 0) {
RDebug::Print(_L("RIFF header"));
} else {
RDebug::Print(_L("not RIFF header"));
}

and for an AMR file like this:

Code:

_LIT8(KAMR, "#!AMR\n");

TBuf8<6> header;
fRead.ReadL(header);

if(header.Compare(KAMR) == 0) {
RDebug::Print(_L("AMR header"));
} else {
RDebug::Print(_L("not AMR header"));
}

Thanks for your help!

Re: reading file header into a descriptor

miranda2112 — Fri, 05 Aug 2005 05:57:28 +0200

thanks for the response yucca!

I have tried a number of different ways but they mainly look something liek this:

Code:

_LIT(KAMR, "#!AMR\n");

RFileReadStream fRead;

TInt err = fRead.Open(aFs, KFileName, EFileRead);
if(err == KErrNone) {
RDebug::Print(_L("!!! file open successful!"));
}

CleanupClosePushL(fRead);

HBufC* header = HBufC::NewL(fRead, 6);

if(header->Compare(KAMR) == 0) {
RDebug::Print(_L("AMR header"));
} else {
RDebug::Print(_L("not AMR header"));
}

I think the problem with this is the max length (6) in the NewL...

How would I do it using TBuf8<6>?

Thanks again,
Miranda

Re: reading file header into a descriptor

yucca — Fri, 05 Aug 2005 05:45:12 +0200

you could just use TBuf8<6> as a buffer and use RFile to read the bytes into it. Which approach are you currently using, and what is the excat problem you are facing with it ?

yucca

reading file header into a descriptor

miranda2112 — Fri, 05 Aug 2005 05:33:12 +0200