Re: Issues in ExtAudioFileSeek and ExtAudioFileTell
Re: Issues in ExtAudioFileSeek and ExtAudioFileTell
- Subject: Re: Issues in ExtAudioFileSeek and ExtAudioFileTell
- From: William Stewart <email@hidden>
- Date: Thu, 5 Nov 2009 10:27:37 -0800
Abdul
Do you have this issue with other files, or just a particular MP3 file?
Bill
On Nov 5, 2009, at 5:49 AM, Abdul.Majeed wrote:
Hi All,
I would like to get some inputs on the issues that I am facing
currently. Please correct me if I am doing something wrong as I am
not expertise in this area.
I was trying to read mp3 audio data in chunk by chunk manner, for
that I uses ExtAudioFileRead as I want the data in uncompressed
format (16 bit, linear PCM).
For a specific .mp3 file (as of my test) i could see that following
results for the ExtAudioFileSeek and ExtAudioFileTell apis.
Sint64 theOffset = (primeOffset + 0); //it gives 576
ExtAudioFileSeek(fileRef,theOffset);
ExtAudioFileTell(fileRef,&theOffset); /// theOffset gives 0
//read a sample frame of theNumPackets = 4096
ExtAudioFileRead(filRef,& theNumPackets,&BufferList);
ExtAudioFileTell(fileRef,&theOffset); /// theOffset gives 4672
Could anybody please tell me ,why first call to ExtAudioFileTell
returns 0 and after reading it gives 4672 (i was expecting 4096)?
Also any more info about the behavior of ExtAudioFileSeek and
ExtAudioFileTell apis are highly appreciated.
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