Re: Ogg File
Re: Ogg File
- Subject: Re: Ogg File
- From: John Stiles <email@hidden>
- Date: Sat, 7 Feb 2004 13:39:38 -0800
You need to explain your "trouble."
I have used Ogg Vorbis and Tremor in OS X and both are fine.
Do NOT call them from your format converter callback; they do too much
work (i.e. allocations) that ruin the latency equation and can make
CoreAudio skip.
Decode your Ogg from the main thread or from a separate feeder thread.
On Feb 7, 2004, at 7:36 AM, Beth Meyer wrote:
Hello everyone,
I already send this mail to the email@hidden
-> So far, I do not get any replies... .
Perhaps one of you does have a clue.
has anyone experience with "CoreAudio" and "Vorbis" ?
I try to decode a file with ov_read(...).
It works for some (mili)seconds and then the Output get into
trouble... .
You need some infos?
char buffer[4096];
OSStatus Render(...) {
bytes_read = ov_read(&vf, buffer, sizeof(buffer), 0, 2, 1,
¤t_section);
memcpy(ioData->mBuffers[0].mData, buffer, bytes_read);
ioData->mBuffers[0].mDataByteSize = bytes_read;
return noErr;
}
SomewhereThePlay Function(...){
...
AURenderCallbackStruct in;
in.inputProc = Render;
in.inputProcRefCon = NULL;
...
AudioStreamBasicDescription sFormat;
sFormat.mSampleRate = 44100;
sFormat.mFormatID = kAudioFormatLinearPCM;
sFormat.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
sFormat.mBytesPerPacket = 4;
sFormat.mFramesPerPacket = 1;
sFormat.mBytesPerFrame = 4;
sFormat.mChannelsPerFrame = 2;
s.mBitsPerChannel = 16;
...
}
You need more info's, please ask....
Thank you in advance,
Beth.
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| References: | |
| | >Ogg File (From: "Beth Meyer" <email@hidden>) |