Re: Streaming Audio - AudioFileStream, CFReadStreamRead and AudioQueue
Re: Streaming Audio - AudioFileStream, CFReadStreamRead and AudioQueue
- Subject: Re: Streaming Audio - AudioFileStream, CFReadStreamRead and AudioQueue
- From: Jens Alfke <email@hidden>
- Date: Wed, 30 Jul 2008 22:35:20 -0700
On 30 Jul '08, at 4:34 AM, Adam Fox wrote: I then open a data stream to a URL of an MP3 stream..
[code]
NSURL *url = "" URLWithString:@"http://mp3stream.com"];
CFHTTPMessageRef message = CFHTTPMessageCreateRequest(kCFAllocatorDefault,
CFSTR("GET"),
(CFURLRef)url,
kCFHTTPVersion1_1);
It would be better to use NSURLConnection instead. It's a higher-level (and OOP) API, and it also handles things like redirects and authentication for you.
..here I try and allocate the stream packets into the an
AudioQueueBuffer and force that buffer into the AudioQueue callback..
Hm, that's not the approach I use. I have a fixed ring of buffers for my queue, and I fill the next buffer with packets when the queue calls me back. I have a secondary buffer where I store the packets read from the stream until they go into the queue.
Your approach might work; but you need to be careful to dispose all the buffers you create after they've been played, else you're leaking memory. I think you can dispose each buffer that the queue's callback gives you, since that callback occurs after the queue has finished playing that buffer.
—Jens |
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