Re: Getting PCM data from MP3/AAC/ALAC File
Re: Getting PCM data from MP3/AAC/ALAC File
- Subject: Re: Getting PCM data from MP3/AAC/ALAC File
- From: Daniel Staudigel <email@hidden>
- Date: Wed, 24 Dec 2008 00:39:57 -0800
Well, I think this may be time to quit:
https://devforums.apple.com/message/18257#18257
"Currently hardware assisted compression formats are not supported for
decode on iPhone OS. These formats are AAC, MP3 and ALAC."
Says "Rincewind".
Anybody have any counterexamples?
Daniel
On Dec 21, 2008, at 6:33 AM, Hamish Allan wrote:
On Sun, Dec 21, 2008 at 4:03 AM, Brian Willoughby <email@hidden
> wrote:
The iPhone is quite the newcomer to the CoreAudio family.
CoreAudio has
been around for almost a decade, I think, and it has been 32-bit
Linear PCM
float during all of that time. The iPhone is probably the first OSX
platform which cannot support high MIPS rates with 32-bit floats,
so the
recent change to CoreAudio to have an additional platform-specific
default
of 8.24 integers is for performance reasons. AudioUnits are also
quite
limited with the current iPhone system.
If you're not working on the iPhone, then William's comments are
dead-on.
Quite so. I wouldn't have brought it up, but for that the OP is
working on the iPhone.
Hamish
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