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POAudioQueue callback in simulator but not on device
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5218335
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0
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1
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2
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CreationDate
2011-03-07T10:10:53.937
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0
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2012-04-10T09:49:03.070
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1
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1083
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I am currently working on an audio processing app on iPhone. it is based on Apple's SpeakHere sample code, aims at real-time audio processing and playback. The code works well in simulator, but not callback when tested on device. The callback function is like this: <pre><code>void AQPlayer::AQBufferCallback(void * inUserData, AudioQueueRef inAQ, AudioQueueBufferRef inCompleteAQBuffer) { AQPlayer *THIS = (AQPlayer *)inUserData; if (THIS->mIsDone) return; UInt32 numBytes; UInt32 nPackets = THIS->GetNumPacketsToRead(); OSStatus result = AudioFileReadPackets(THIS->GetAudioFileID(), false, &numBytes, inCompleteAQBuffer->mPacketDescriptions, THIS->GetCurrentPacket(), &nPackets, inCompleteAQBuffer->mAudioData); if (result) printf("AudioFileReadPackets failed: %d", (int)result); if (nPackets > 0) { inCompleteAQBuffer->mAudioDataByteSize = numBytes; inCompleteAQBuffer->mPacketDescriptionCount = nPackets; //Buffer Modification SInt16 *testBuffer = (SInt16*)inCompleteAQBuffer->mAudioData; for (int i = inCompleteAQBuffer->mAudioDataByteSize/sizeof(SInt16); i > 0; i --) { //printf("before modification %d", (int)*testBuffer); *testBuffer = *testBuffer/2; //Simplest processing //printf("after modification %d", (int)*testBuffer); testBuffer++; } //Enqueue Buffer AudioQueueEnqueueBuffer(inAQ, inCompleteAQBuffer, 0, NULL); THIS->mCurrentPacket = (THIS->GetCurrentPacket() + nPackets); } </code></pre> Other parts remains same as in SpeakHere sample code. So what is the problem related to this strange behavior? Any insight will be appreciated. And kindly let me know if more information is needed. Thank you very much. Cheers, Manca
Tags
<iphone><objective-c><ios><core-audio><audioqueueservices>
Title
AudioQueue callback in simulator but not on device
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1. PTQuestion
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1. USManca
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 POAudioQueue callback in simulator but not on device
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CommentsPostId
1. COAre you initializing your audio session and configuring it for play and record?
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 POAudioQueue callback in simulator but not on device
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 UShotpaw2
2. COYes the AudioSessionSetActive() is set to true, just as the sample code.
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 POAudioQueue callback in simulator but not on device
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 USManca

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