Question about RBuf8

[birch01]

Hello everyone,

I have a problem that will probably be trivial to someone with more knowledge about Symbian.

I need to play an audio stream. I do it like this:

in .h
CMdaAudioOutputStream* iAudioStream;

in .cpp (I'm omitting if (err ==...))

TRAP(err, iAudioStream->SetDataTypeL(KMMFFourCCCodePCM16));
TRAP(err, iAudioStream->SetAudioPropertiesL(TMdaAudioDataSettings::ESampleRate11025Hz, TMdaAudioDataSettings::EChannelsMono));
TRAP(err, iAudioStream->WriteL(buffer));

I don't have a problem playing audio if I open a file. But I need to generate audio data on the fly. My problem lies with iAudioStream->WriteL(buffer) because buffer in iAudioStream->WriteL must be RBuf8 and the data that I need to play is located in TFixedArray<TInt16, 512> buffer.

Could someone please tell me how to go about transfering data from the fixed array to audio stram's RBuf8 buffer?

[wizard_hu_]

I do not think that it would have to be an RBuf8, it can be any kind of 8-bit descriptor.
If you have a pointer and a length, you can always create a 8-bit descriptor:

TPtrC8 ptr(reinterpret_cast<const TUint8 *>(pointer),length);

Note that WriteL expects the descriptor (so the TPtrC8 object in this case) reachable until you get MaoscBufferCopied, so the descriptor has to be a member variable too (you can use its Set method instead of its constructor).

[mdzahidul_haque]

as wizard has pointed out, it need not to be RBuf8, it can be any 8-bit descriptor.