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2014/10/15 ¤U¤È 10:08:41
iphone Programming Glossary: extaudiofilewriteasyncWrite Audio To Disk From IO Unit http://stackoverflow.com/questions/6930609/write-audio-to-disk-from-io-unit and bears some audiable resemblance to the original mp3 but it sounds very distorted. I'm not sure if the problem is A ExtAudioFileWriteAsync cant write the samples as fast as the io unit callback provides them. or B I have set up the ASBD for the extaudiofile refeference.. AudioUnitRender engineDescribtion.equnit ioActionFlags inTimeStamp 0 inNumberFrames ioData if engine isrecording ExtAudioFileWriteAsync engine recordingfileref inNumberFrames ioData return 0 the recording setup void startrecording NSArray paths NSSearchPathForDirectoriesInDomains.. ioData AudioUnitRender engineDescribtion.equnit ioActionFlags inTimeStamp 0 inNumberFrames ioData if isrecording ExtAudioFileWriteAsync engine recordingfileref inNumberFrames ioData return 0 In this callback I'm pulling audio data from another audio unit that..
How to record sound produced by mixer unit output (iOS Core Audio & Audio Graph) http://stackoverflow.com/questions/7118429/how-to-record-sound-produced-by-mixer-unit-output-ios-core-audio-audio-graph AudioStreamBasicDescription stereoStreamFormat NSAssert setupErr noErr @ Couldn't create file for format setupErr ExtAudioFileWriteAsync effectState.audioFileRef 0 NULL NSAssert setupErr noErr @ Couldn't initialize write buffers for audio file And the recording.. ioData if ioActionFlags kAudioUnitRenderAction_PostRender inBusNumber 0 EffectState effectState EffectState inRefCon ExtAudioFileWriteAsync effectState audioFileRef inNumberFrames ioData return noErr There is something missing in the output file output.caf . I'm..
Can anybody help me in recording iPhone output sound through Audio Unit http://stackoverflow.com/questions/8615358/can-anybody-help-me-in-recording-iphone-output-sound-through-audio-unit sizeof AudioStreamBasicDescription audioFormat NSAssert setupErr noErr @ Couldn't create file for format setupErr ExtAudioFileWriteAsync effectState.audioFileRef 0 NULL NSAssert setupErr noErr @ Couldn't initialize write buffers for audio file the recording.. NSLog @ AudioUnitRender error return noErr Now we have the samples we just read sitting in buffers in bufferList ExtAudioFileWriteAsync effectState audioFileRef inNumberFrames bufferList return noErr then stop Recording void stopRecord AudioOutputUnitStop.. effectState.audioFileRef by passing 0 frames and NULL audiobuffer is just for init internal buffers setupErr ExtAudioFileWriteAsync effectState.audioFileRef 0 NULL That's what's going wrong in recordingCallback 1 ioActionFlags are always 0 and inBusNumber..
iPhone: NSData representation of Audio file for Editing http://stackoverflow.com/questions/9385705/iphone-nsdata-representation-of-audio-file-for-editing can freely mix the samples together to and from whatever position you like and save the new mixed file to disk using ExtAudioFileWriteAsync. For example Extract sound 1 into buffer A. Extract sound 2 into buffer B. Create buffer C whose size is A's length plus..
http://stackoverflow.com/questions/9569466/nscoding-vs-core-data
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