Getting wrong data format for stream
Getting wrong data format for stream
- Subject: Getting wrong data format for stream
- From: Tom Harrington <email@hidden>
- Date: Tue, 21 Jul 2009 15:03:11 -0600
I'm using Audio File Stream Services to play streaming audio from a web site.
The stream in question is MP3, 44100Hz, 112kbps, from a shoutcast
server (more details on request). When I create the stream I provide
a file type hint of kAudioFileMP3Type.
Periodically, maybe one out of 8 times, I get bogus data for
kAudioFileStreamProperty_DataFormat. It'll have an incorrect sample
rate (usually 32000Hz or 48000Hz) and a format of MP1
(kAudioFormatMPEGLayer1). Playback then fails-- since I'm on iPhone,
AudioQueueNewOutput() returns kAudioFormatUnknownFormatError.
I look up the format by waiting for
kAudioFileStreamProperty_ReadyToProducePackets and then doing:
AudioStreamBasicDescription dataFormat;
UInt32 propertySize = sizeof(AudioStreamBasicDescription);
OSStatus audioStatus = AudioFileStreamGetProperty(inAudioFileStream,
kAudioFileStreamProperty_DataFormat, &propertySize, &dataFormat);
When I get bogus data, audioStatus is 0, but the returned format is
bogus. What can I do to deal with this?
--
Tom Harrington
email@hidden
AIM: atomicbird1
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden