Re: AudioHardwarePlugIn question
Re: AudioHardwarePlugIn question
- Subject: Re: AudioHardwarePlugIn question
- From: Dirk Musfeldt <email@hidden>
- Date: Mon, 18 Oct 2004 15:08:26 +0200
Jeff,
OK, thanks for that basic answer. I implemented the float format now and do
not support hog mode.
I ran the ComplexPlayThru sample and it did not catch any errors. But I
didn't hear anything, though. :-(
What is the easiest way to determine the problem with this implementation?
> There are two formats that you have to maintain, the virtual format
> (the format that IOProcs see) and the physical format (the format that
> your device does IO in). In the non-linear PCM case or the non-mixable
> linear PCM case, these two formats are the same. In the case of mixable
> linear PCM, the virtual format will always be native endian 32 bit
> floats, regardless of what the physical format is. Your plug-in is
> responsible for doing any necessary conversions.
>
> Note that the non-mixable formats imply single client access, so you
> will need to manage hog mode properly as well. Note also that most apps
> won't work with non-mixable formats.
>
> On Oct 14, 2004, at 8:45 AM, Dirk Musfeldt wrote:
>
>> Hi all,
>>
>> I'm doing an AudioHardwarePlugIn.
>>
>> Which stream formats do i need to support to be of any use?
>>
>> I tried with
>>
>> 48000.0,
>> kAudioFormatLinearPCM,
>> kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsBigEndian |
>> kAudioFormatFlagIsPacked,
>> 4,
>> 1,
>> 4,
>> 2,
>> 16 // the number of bits in each channel
>>
>> but this does not give any success. This is the 'natural' format of our
>> data.
>>
>> Any advice?
>>
>>
>>
>> Regards
>>
>> Dirk
>>
>>
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Regards
Dirk
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