Re: Quicktime support for Core Audio AudioFileFormat components.
Re: Quicktime support for Core Audio AudioFileFormat components.
- Subject: Re: Quicktime support for Core Audio AudioFileFormat components.
- From: William Stewart <email@hidden>
- Date: Thu, 15 Sep 2005 14:27:22 -0700
On 14/09/2005, at 6:27 PM, Nathaniel Gray wrote:
On 9/14/05, Brad Ford <email@hidden> wrote:
We definitely do want to support AudioFileComponents generically. In
QT 7 we already do provide partial support for AFC's (we can, for
instance, import .caf, .aac, and .adts files). But again, you don't
need to worry about AFC's. The Ogg project already has working eat
and spit components. So you can already read and write Ogg files.
You just need an 'adec' to decode vorbis properly in an
AudioConverter world, and perhaps an 'aenc' to encode vorbis --
likewise using the AudioConverter API's. CoreAudio provides
excellent soup starter code for AudioCodec writing -- providing a
sample codec (IMA) implementation in their SDK. Check it out.
I would like to amend Brad's comment slightly here. If you are
interested and want to do the extra work, having an AFC for ogg files
would be a very good addition and feature of the platform. We are
actively encouraging many audio developers to move or adopt these
APIs in general as they interface with just audio content. Already
for instance, Digital Performer has a pretty comprehensive UI to use
these services as an export option for DP projects. This to me seems
like a great feature to support, and one that you might want to give
some thought to.
Bill
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