2014/10/15 下午 10:04:11

iphone Programming Glossary: audiobufferlist

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 with.. 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 to read.. play them back using Audio Units. iphone ios core audio audiounit share improve this question Here is how I do it AudioBufferList AllocateABL UInt32 channelsPerFrame UInt32 bytesPerFrame bool interleaved UInt32 capacityFrames AudioBufferList bufferList..

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 clientFormat.mChannelsPerFrame.. 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..

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 audioBufferList.. false pplayerState mIsRunning NO return AudioBufferList audioBufferList CMBlockBufferRef blockBuffer CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer sampBuffer NULL audioBufferList sizeof audioBufferList NULL NULL 0 blockBuffer AudioBuffer audioBuffer..

Reading audio samples via AVAssetReader

http://stackoverflow.com/questions/4972677/reading-audio-samples-via-avassetreader

objective c cocoa touch avfoundation share improve this question To expand on @amrox's answer you can get an AudioBufferList from the CMBlockBufferRef e.g. CMItemCount numSamplesInBuffer CMSampleBufferGetNumSamples buffer AudioBufferList audioBufferList.. an AudioBufferList from the CMBlockBufferRef e.g. CMItemCount numSamplesInBuffer CMSampleBufferGetNumSamples buffer AudioBufferList audioBufferList CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer buffer NULL audioBufferList sizeof audioBufferList.. CMItemCount numSamplesInBuffer CMSampleBufferGetNumSamples buffer AudioBufferList audioBufferList CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer buffer NULL audioBufferList sizeof audioBufferList NULL NULL kCMSampleBufferFlag_AudioBufferList_Assure16ByteAlignment..

AudioUnits causing universal skipping after returning from Springboard

http://stackoverflow.com/questions/6130443/audiounits-causing-universal-skipping-after-returning-from-springboard

void pRefCon AudioUnitRenderActionFlags flags const AudioTimeStamp timeStamp UInt32 busNum UInt32 numFrames AudioBufferList pData OSStatus tErr noErr Do Nothing return tErr @implementation MySoundStream void dealloc self Unload super dealloc void..

Write Audio To Disk From IO Unit

http://stackoverflow.com/questions/6930609/write-audio-to-disk-from-io-unit

ioActionFlags const AudioTimeStamp inTimeStamp UInt32 inBusNumber UInt32 inNumberFrames AudioBufferList ioData ref.equnit AudioUnitRender engineDescribtion.channelMixers inBusNumber ioActionFlags inTimeStamp 0 inNumberFrames.. ioActionFlags const AudioTimeStamp inTimeStamp UInt32 inBusNumber UInt32 inNumberFrames AudioBufferList ioData AudioUnitRender engineDescribtion.equnit ioActionFlags inTimeStamp 0 inNumberFrames ioData if isrecording ExtAudioFileWriteAsync.. ioActionFlags const AudioTimeStamp inTimeStamp UInt32 inBusNumber UInt32 inNumberFrames AudioBufferList ioData AudioUnitRender engineDescribtion.masterChannelMixerUnit ioActionFlags inTimeStamp 0 inNumberFrames ioData process..

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

ioActionFlags const AudioTimeStamp inTimeStamp UInt32 inBusNumber UInt32 inNumberFrames AudioBufferList ioData if ioActionFlags kAudioUnitRenderAction_PostRender inBusNumber 0 EffectState effectState EffectState inRefCon ExtAudioFileWriteAsync..

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

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.. CMSampleBufferRef ref output copyNextSampleBuffer NSLog @ @ ref if ref NULL break copy data to file read next one AudioBufferList audioBufferList NSMutableData data NSMutableData alloc init CMBlockBufferRef blockBuffer CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer..

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 Fill.. 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 EffectState.. ioActionFlags const AudioTimeStamp inTimeStamp UInt32 inBusNumber UInt32 inNumberFrames AudioBufferList ioData double timeInSeconds inTimeStamp mSampleTime kSampleRate printf n fs inBusNumber lu inNumberFrames lu timeInSeconds..

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..

AVAssetReader and Audio Queue streaming problem

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

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

Reading audio samples via AVAssetReader

http://stackoverflow.com/questions/4972677/reading-audio-samples-via-avassetreader

from the CMBlockBufferRef e.g. CMItemCount numSamplesInBuffer CMSampleBufferGetNumSamples buffer AudioBufferList audioBufferList CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer buffer NULL audioBufferList sizeof audioBufferList NULL NULL kCMSampleBufferFlag_AudioBufferList_Assure16ByteAlignment.. buffer AudioBufferList audioBufferList CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer buffer NULL audioBufferList sizeof audioBufferList NULL NULL kCMSampleBufferFlag_AudioBufferList_Assure16ByteAlignment buffer for int bufferCount 0.. audioBufferList CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer buffer NULL audioBufferList sizeof audioBufferList NULL NULL kCMSampleBufferFlag_AudioBufferList_Assure16ByteAlignment buffer for int bufferCount 0 bufferCount audioBufferList.mNumberBuffers..

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

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.. NSMutableData alloc init CMBlockBufferRef blockBuffer CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer ref NULL audioBufferList sizeof audioBufferList NULL NULL 0 blockBuffer for int y 0 y audioBufferList.mNumberBuffers y AudioBuffer audioBuffer.. CMBlockBufferRef blockBuffer CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer ref NULL audioBufferList sizeof audioBufferList NULL NULL 0 blockBuffer for int y 0 y audioBufferList.mNumberBuffers y AudioBuffer audioBuffer audioBufferList.mBuffers..

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

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.. NSMutableData alloc init CMBlockBufferRef blockBuffer CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer ref NULL audioBufferList sizeof audioBufferList NULL NULL 0 blockBuffer for int y 0 y audioBufferList.mNumberBuffers y AudioBuffer audioBuffer audioBufferList.mBuffers.. CMBlockBufferRef blockBuffer CMSampleBufferGetAudioBufferListWithRetainedBlockBuffer ref NULL audioBufferList sizeof audioBufferList NULL NULL 0 blockBuffer for int y 0 y audioBufferList.mNumberBuffers y AudioBuffer audioBuffer audioBufferList.mBuffers..