old mtcoreaudio code doesn't work now

Subject: old mtcoreaudio code doesn't work now
From: Robert Ackerman <email@hidden>
Date: Thu, 20 Dec 2007 23:11:21 -0800
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my old code did an 'allocNewConverter' with calls that don't exist in the lastest version. any hints on how to adapt this code. probably other issues after that, so any example code would help.

this is my current code that doesn't work:

- (void) allocNewConverter { NSLog(@"allocNewConverter"); Float64 inScale = ([self sampleRate] / [outputDevice nominalSampleRate]); unsigned inBufferSize = ceil ( inScale * [outputDevice deviceMaxVariableBufferSizeInFrames] * SR_ERROR_ALLOWANCE ); if (inBuffer) MTAudioBufferListDispose(inBuffer); inBuffer = MTAudioBufferListNew(1, inBufferSize, NO);

AudioStreamBasicDescription shtoomDescription; shtoomDescription.mSampleRate = [self sampleRate]; shtoomDescription.mFormatID = kAudioFormatLinearPCM; shtoomDescription.mFormatFlags = kLinearPCMFormatFlagIsPacked | kLinearPCMFormatFlagIsSignedInteger | kLinearPCMFormatFlagIsBigEndian | kAudioFormatFlagIsNonInterleaved; shtoomDescription.mBytesPerFrame = sizeof(SInt16); shtoomDescription.mFramesPerPacket = 1; shtoomDescription.mBytesPerPacket = sizeof(SInt16); shtoomDescription.mChannelsPerFrame = 1; shtoomDescription.mBitsPerChannel = 16; shtoomDescription.mReserved = 0;

[inConverter release]; inConverter = [[MTConversionBuffer alloc] initWithSourceDescription:shtoomDescription bufferFrames:inBufferSize destinationDescription:[MTConversionBuffer descriptionForDevice:outputDevice forDirection:kMTCoreAudioDevicePlaybackDirection] bufferFrames:ceil ( [outputDevice deviceMaxVariableBufferSizeInFrames] * SR_ERROR_ALLOWANCE )];

Float64 outScale = ([self sampleRate] / [inputDevice nominalSampleRate]); unsigned outBufferSize = ceil ( outScale * [inputDevice deviceMaxVariableBufferSizeInFrames] * SR_ERROR_ALLOWANCE ); if (outBuffer) MTAudioBufferListDispose(outBuffer); outBuffer = MTAudioBufferListNew(1, outBufferSize, NO);

[outConverter release]; outConverter = [[MTConversionBuffer alloc] initWithSourceDescription:[MTConversionBuffer descriptionForDevice:inputDevice forDirection:kMTCoreAudioDeviceRecordDirection] bufferFrames:outBufferSize destinationDescription:shtoomDescription bufferFrames:ceil ( [outputDevice deviceMaxVariableBufferSizeInFrames] * SR_ERROR_ALLOWANCE )];

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Re: old mtcoreaudio code doesn't work now
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