2014/10/15 下午 10:04:11

iphone Programming Glossary: audiobuffer

iPhone: AudioBufferList init and release

http://stackoverflow.com/questions/3767527/iphone-audiobufferlist-init-and-release

AudioBufferList init and release What are the correct ways of initializing allocating memory and releasing freeing an AudioBufferList.. AudioBufferList init and release What are the correct ways of initializing allocating memory and releasing freeing an AudioBufferList with 3 AudioBuffers I'm aware that there might be more than one ways of doing this. I'd like to use those 3 buffers.. release What are the correct ways of initializing allocating memory and releasing freeing an AudioBufferList with 3 AudioBuffers I'm aware that there might be more than one ways of doing this. I'd like to use those 3 buffers to read sequential parts..

Audio Processing: Playing with volume level

http://stackoverflow.com/questions/3982723/audio-processing-playing-with-volume-level

audiofile kExtAudioFileProperty_FileLengthFrames size numFrames create the buffers for reading in data AudioBufferList bufferList malloc sizeof AudioBufferList sizeof AudioBuffer clientFormat.mChannelsPerFrame 1 bufferList mNumberBuffers.. size numFrames create the buffers for reading in data AudioBufferList bufferList malloc sizeof AudioBufferList sizeof AudioBuffer clientFormat.mChannelsPerFrame 1 bufferList mNumberBuffers clientFormat.mChannelsPerFrame for int.. size numFrames create the buffers for reading in data AudioBufferList bufferList malloc sizeof AudioBufferList sizeof AudioBuffer clientFormat.mChannelsPerFrame 1 bufferList mNumberBuffers clientFormat.mChannelsPerFrame for int ii 0 ii bufferList mNumberBuffers..

AVAssetReader and Audio Queue streaming problem

http://stackoverflow.com/questions/4763598/avassetreader-and-audio-queue-streaming-problem

status after null d pplayerState ar status AudioQueueStop pplayerState mQueue false pplayerState mIsRunning NO return AudioBufferList audioBufferList CMBlockBufferRef blockBuffer CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer sampBuffer NULL.. false pplayerState mIsRunning NO return AudioBufferList audioBufferList CMBlockBufferRef blockBuffer CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer sampBuffer NULL audioBufferList sizeof audioBufferList NULL NULL 0 blockBuffer AudioBuffer audioBuffer.. sampBuffer NULL audioBufferList sizeof audioBufferList NULL NULL 0 blockBuffer AudioBuffer audioBuffer audioBufferList.mBuffers 0 memcpy inData 2 offsetSample audioBuffer.mData audioBuffer.mDataByteSize bytesToRead..

How to copy songs from iPod Library to app and play with AVAudioPlayer?

http://stackoverflow.com/questions/7472141/how-to-copy-songs-from-ipod-library-to-app-and-play-with-avaudioplayer

0 while TRUE CMSampleBufferRef ref output copyNextSampleBuffer if ref NULL break copy data to file read next one AudioBufferList audioBufferList NSMutableData data NSMutableData alloc init CMBlockBufferRef blockBuffer CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer.. audioBufferList NSMutableData data NSMutableData alloc init CMBlockBufferRef blockBuffer CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer ref NULL audioBufferList sizeof audioBufferList NULL NULL 0 blockBuffer for int y 0 y audioBufferList.mNumberBuffers.. NULL audioBufferList sizeof audioBufferList NULL NULL 0 blockBuffer for int y 0 y audioBufferList.mNumberBuffers y AudioBuffer audioBuffer audioBufferList.mBuffers y Float32 frame audioBuffer.mData Float32 currentSample frame i data appendBytes..

iOS 5.0 crash when reading data from an AVAssetReaderOutput

http://stackoverflow.com/questions/7812394/ios-5-0-crash-when-reading-data-from-an-avassetreaderoutput

0 while TRUE CMSampleBufferRef ref output copyNextSampleBuffer if ref NULL break copy data to file read next one AudioBufferList audioBufferList NSMutableData data NSMutableData alloc init CMBlockBufferRef blockBuffer CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer.. audioBufferList NSMutableData data NSMutableData alloc init CMBlockBufferRef blockBuffer CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer ref NULL audioBufferList sizeof audioBufferList NULL NULL 0 blockBuffer for int y 0 y audioBufferList.mNumberBuffers.. ref NULL audioBufferList sizeof audioBufferList NULL NULL 0 blockBuffer for int y 0 y audioBufferList.mNumberBuffers y AudioBuffer audioBuffer audioBufferList.mBuffers y Float32 frame audioBuffer.mData NSLog @ Gonna write d audioBuffer.mDataByteSize crashes..

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

ioActionFlags const AudioTimeStamp inTimeStamp UInt32 inBusNumber UInt32 inNumberFrames AudioBufferList ioData NSLog @ callback if ioActionFlags kAudioUnitRenderAction_PostRender inBusNumber 0 AudioBufferList bufferList.. AudioBufferList ioData NSLog @ callback if ioActionFlags kAudioUnitRenderAction_PostRender inBusNumber 0 AudioBufferList bufferList Fill this up with buffers you will want to malloc it as it's a dynamic length list EffectState effectState.. bufferList if noErr status printf AudioUnitRender error ld status return noErr You just need to define an valid AudioBuffer and pass it to AudioUnitRender this is my working RenderCallback static OSStatus recordingCallback void inRefCon AudioUnitRenderActionFlags..

ExtAudioFileWrite to m4a/aac failing on dual-core devices (ipad 2, iphone 4s)

http://stackoverflow.com/questions/8719865/extaudiofilewrite-to-m4a-aac-failing-on-dual-core-devices-ipad-2-iphone-4s

sizeof AudioStreamBasicDescription localFormat prep AllRenderData allData allRenderData writeBuffer malloc sizeof AudioBufferList 2 sizeof AudioBuffer writeBuffer mNumberBuffers 2 writeBuffer mBuffers 0 .mNumberChannels 1 writeBuffer mBuffers 0 .mDataByteSize.. localFormat prep AllRenderData allData allRenderData writeBuffer malloc sizeof AudioBufferList 2 sizeof AudioBuffer writeBuffer mNumberBuffers 2 writeBuffer mBuffers 0 .mNumberChannels 1 writeBuffer mBuffers 0 .mDataByteSize bufferBytes..