RE: AudioConverterFillBuffer failure
RE: AudioConverterFillBuffer failure
- Subject: RE: AudioConverterFillBuffer failure
- From: "Patzer, Curtis" <email@hidden>
- Date: Fri, 27 Feb 2004 11:16:06 -0800
- Thread-topic: AudioConverterFillBuffer failure
Hi Bill,
It's all working now, thank for you help.
What I learned:
- I was using old example code which had deprecated functions,
and loaded an older version (v1) audio unit. I based my new code on
PlayAudioFileLite.
- You're right about not needing the converter. The
DefaultAudioOutputUnit handles all format conversions, resampling and
channel mapping. That simplified things somewhat.
Curtis
-----Original Message-----
From: William Stewart [
mailto:email@hidden]
Sent: Monday, February 23, 2004 1:59 PM
To: Patzer, Curtis
Cc: email@hidden
Subject: Re: AudioConverterFillBuffer failure
The output unit already embeds a converter within it, so you can just
set the format from your source to the output unit, and it will do the
work that needs to be done
Bill
On 23/02/2004, at 10:48 AM, Patzer, Curtis wrote:
Hi Bill,
I was under the impression that I need to use a converter
because I'm
also resampling and remapping channels. Can I do all this
without a
converter?
I've realized that I need to use
AudioConverterFillComplexBuffer, since
AudioConverterFillBuffer is deprecated. I have the callbacks
working
now, but it crashes after a few rounds.
Thanks,
Curtis
-----Original Message-----
From: William Stewart [
mailto:email@hidden]
Sent: Friday, February 20, 2004 5:34 PM
To: Patzer, Curtis
Cc: email@hidden
Subject: Re: AudioConverterFillBuffer failure
You should let the output unit do the conversion for you... just
tell
it what format you are going to give it and it will take care of
the
details - no need or benefit to adding your own converter here.
Bill
On 19/02/2004, at 10:53 AM, Patzer, Curtis wrote:
I've connected a cross-platform audio mixer to the
Default Output
Unit,
using an Audio Converter to convert the mixer's output
format to the
Default Output Unit's format. This seems to work for
devices with
interleaved output formats, including the built-in audio
device. I
interleave the mixer's output before passing it to the
converter.
However, if I use a Digidesign output device,
AudioConverterFillBuffer
fails with -50 (invalid parameter). The Digidesign
device has a
non-interleaved output stream, but it defaults to an
interleaved input
stream.
I'm using Panther (OS10.3.2) with Digidesign Core Audio
driver version
6.2.3.
Curtis Patzer
Audio Software Engineer II, Electronic Arts Canada
(604)456-3910, email@hidden
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