Re: Issues in ExtAudioFileSeek and ExtAudioFileTell

Subject: Re: Issues in ExtAudioFileSeek and ExtAudioFileTell

From: Abdul.Majeed <email@hidden>

Date: Fri, 6 Nov 2009 12:46:17 +0530

Delivered-to: email@hidden

Hi Bill,

Thanks a tone for your quick response.

Please here it is more information

1. for another .mp3 file result i got as

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

2. for another .m4a file result i got as

Sint64 theOffset = (primeOffset + 0); //it gives 2112

ExtAudioFileSeek(fileRef,theOffset);

ExtAudioFileTell(fileRef,&theOffset); /// theOffset gives 0

//read a sample frame of theNumPackets = 262144

ExtAudioFileRead(filRef,& theNumPackets,&BufferList);

ExtAudioFileTell(fileRef,&theOffset); /// theOffset gives 264320

3. for another .m4v file result i got as

Sint64 theOffset = (primeOffset + 0); //it gives 2112

ExtAudioFileSeek(fileRef,theOffset);

ExtAudioFileTell(fileRef,&theOffset); /// theOffset gives 0

//read a sample frame of theNumPackets = 262144

ExtAudioFileRead(filRef,& theNumPackets,&BufferList);

ExtAudioFileTell(fileRef,&theOffset); /// theOffset gives 264320

so in conclusion, if there primeOffset value from kAudioConverterPrimeInfo is greater than 0 then only this issues coming else it is fine.

Could you please help me by giving your valuable inputs.

Thanks for your time.

abdul

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References:
	>Issues in ExtAudioFileSeek and ExtAudioFileTell (From: "Abdul.Majeed" <email@hidden>)
	>Re: Issues in ExtAudioFileSeek and ExtAudioFileTell (From: William Stewart <email@hidden>)