Windows error 0x00000029, 41

gdb weird backtrace

My program is statically compiled with dietlibc. It is compiled on ubuntu x64 (compiled for x86 using the -m32 flag) and is run on a centos x86. The compiled size is only about 100KB. I compile it with -ggdb3 and no optimization flags. My program uses signal.h to handle a [...] read more

Silence when adding kAudioUnitSubType_MultiChannelMixer to AUGraph

I'm having trouble inserting a mixer unit into an AUGraph that otherwise works OK on both Mac OS and iOS. My working graph looks like this: (My Audio render callback) <- [Format converter] <- [DefaultOutput] In addition, I'm able to successfully insert an EQ unit like this: (My Audio render [...] read more

Linux heap structure and the behaviour with malloc() and free()

I have a Debian with a Linux 2.6 Kernel, and I try to understand how the heap works/behaves with malloc() and free(). I tried to search for malloc() and free() algorithm and heap structure, but I couldn't find anything helpful. And unfortunately, I know too less about Linux and how [...] read more

How to mount a fuse-sshfs file system inside a FreeBSD-12.0p10 jail

I wish to mount a remote data source locally as a fuse file system. This is listed as supported by lsvfs: lsvfs Filesystem Num Refs Flags -------------------------------- ---------- ----- --------------- devfs 0x00000071 4 synthetic, jail cd9660 0x000000bd 0 read-only procfs 0x00000002 4 synthetic, jail nfs 0x0000003a 0 network zfs 0x000000de [...] read more

AUGraph - reconfigure on the fly?

I am trying to rearrange the nodes in an AUGraph during playback (render). In particular, I am trying to switch between these two setups: 1. Multichannel Mixer -> Remote I/O 2. Multichannel Mixer -> Converter #0 -> Bandpass Filter -> Converter #1 -> Remote I/O (The stream converters are needed [...] read more

How should an AUMatrixMixer be configured in an AVAudioEngine graph?

I'm completely stuck on this and would appreciate any assistance... I have an AUMatrixMixer implemented in an AVAudioEngine graph and I cannot get any sound. If I swap out the AUMatrixMixer for an AUMultiChannelMixer I can get sound. I have installed a tap on the immediate upstream node (AUHighPassFilter) and [...] read more

Changing rate on audio unit NewTimePitch

I'm using AUGraph with different audio units in it, one of them is of type kAudioUnitType_FormatConverter, and subtype kAudioUnitSubType_NewTimePitch. I'm trying to change the kNewTimePitchParam_Rate parameter on it. It does work in some way, but when I reset the parameter to the value 1.0 (no change rate) I still get [...] read more

Using iOS Reverb effect

kAudioUnitSubType_Reverb2 effect doesn't work in my Audio Unit graph. When I exclude its node from graph everything works fine. I tried to add converters between previous node and reverb node and after reverb. I did set the stream format of the converter node input to the format of previous node [...] read more

NewTimePitch with Mixer

I have a graph working that is very similar to the example app provided by Apple. https://developer.apple.com/library/ios/samplecode/MixerHost/Listings/Classes_MixerHostAudio_m.html#//apple_ref/doc/uid/DTS40010210-Classes_MixerHostAudio_m-DontLinkElementID_6 My mixerNode is being fed by custom data (rather than guitar/beats) - but the setup is similar. Both buses are stereo on the mixer. I am trying to time shift the content, but [...] read more

Serial port reading in c, using WinApi functions; WaitCommEvent fails

I tried to write a small event-based application in C for serial port reading (sources below). My program is to use the WinApi functions. The comport.c has the functions written to handle COM-port (open, read, write), the utils.c has some helper functions. My program produces always the following output: > [...] read more

Linux syscall in vmlinux and virtual memory

I have find the sys_open code from vmlinux binary: c1143c20: 55 push ebp c1143c21: 89 e5 mov ebp,esp c1143c23: 83 ec 10 sub esp,0x10 c1143c26: 89 5d f4 mov DWORD PTR [ebp-0xc],ebx c1143c29: 89 75 f8 mov DWORD PTR [ebp-0x8],esi c1143c2c: 89 7d fc mov DWORD PTR [ebp-0x4],edi **c1143c2f: e8 [...] read more

Is GDB interpreting the memory address correctly?

I am examining the contents of a memory address using GDB, but don't know if it is being displayed correctly. (gdb) p (char *)0x8182f40 $4 = 0x8182f40 "XYZ" (gdb) (gdb) x/40x 0x8182f40-16 0x8182f30: 0x00000000 0x00000000 0x000000a8 0x00000010 0x8182f40: 0x005a5958 0x00000000 0x00000000 0x00000029 0x8182f50: 0x00000000 0x00000000 0x00010000 0x082439d8 0x8182f60: 0x08199100 0x00000000 [...] read more

Default code from Cocos2d-V3 isn't working at all?

I ran the default code provided with the cocos2d template but doesn't seems to work. But a tutorial at Ray Wenderlich says it should be working. I Couldn't get any far from boilerplate code. when I ran the initial code provided by default. got crashed with the following out put [...] read more

Add kAudioUnitSubType_Varispeed to AUGraph in iOS5

I am trying to add a kAudioUnitSubType to an AUGraph in iOS 5 but when I add it and call AUGraphInitialize an error code -10868 is returned (kAudioUnitErr_FormatNotSupported). Here is my AudioComponentDescription: AudioComponentDescription varispeedDescription; varispeedDescription.componentType = kAudioUnitType_FormatConverter; varispeedDescription.componentSubType = kAudioUnitSubType_Varispeed; varispeedDescription.componentManufacturer = kAudioUnitManufacturer_Apple; varispeedDescription.componentFlags = 0; varispeedDescription.componentFlagsMask = 0; If [...] read more

AVAudioEngine: no sound

I'm trying to test AVAudioEngine, watched the WWDC conferences about it, and did everything by the book to try to play a simple file. Despite everything being exactly the same as in the samples that I found (WWDC and a few other places), despite everything seeming fine (no error, seems [...] read more

AudioKit AK3DPanner not working

I've been playing aroung with AudioKit v3.3 lately for a new project and am hitting a wall with the 3D spatialization node called AK3DPanner. At one point I got it to run, although it seemed extremely crude, either playing all sound in the left or the right ear. Not at [...] read more

AUGraphGetNodeInteractions returns no interactions on iphone 5c

I use AUNodeInteraction interaction; UInt32 ioNumInteractions; AUGraphGetNodeInteractions(graph, node, &ioNumInteractions, &interaction)); On all devices (iphone 5s, 6, 6s, 7) it returns interaction and connected nodes, but on iphone 5c and ipad mini it returns no interactions (ioNumInteractions = 0). Maybe the reason is a 32bit CPU. Any ideas how to solve [...] read more

Xcode: sigABRT in alcMakeContextCurrent

I was fiddling around trying to get Game Center Leaderboards to work. After becoming frustrated, I just removed the code that I added. However, I now am stuck with this error, even though I deleted it! It almost feels like I ruined a perfectly finished game. Specifically, here is when [...] read more

Can't connect converter Audio Unit to Reverb Effect

I am trying to reshape an AUGraph that looks like this: multichannel mixer -> remote I/O into something like this: callback -> converter1 -> bandpass -> reverb -> converter2 -> mixer(bus 0) -> remote I/O after the graph has been initialized and started (i.e., "on the fly"). To allow the [...] read more

AudioUnit kAudioUnitSubType_Reverb2 and kAudioUnitType_FormatConverter

I have this AUGraph configuration AudioUnitGraph 0x2505000: Member Nodes: node 1: 'aufx' 'ipeq' 'appl', instance 0x15599530 O node 2: 'aufx' 'rvb2' 'appl', instance 0x1566ffd0 O node 3: 'aufc' 'conv' 'appl', instance 0x15676900 O node 4: 'aumx' 'mcmx' 'appl', instance 0x15676a30 O node 5: 'aumx' 'mcmx' 'appl', instance 0x15677ac0 O node [...] read more

iOS - AudioFormat issue linking up mixer, remoteio and dynamics processor

I'm trying to link up my mixer -> remoteio -> dynamics processor Here is my AudioFormat // Describe format memset( &audioFormat, 0, sizeof(AudioStreamBasicDescription) ); audioFormat.mSampleRate = 44100.00; audioFormat.mFormatID = kAudioFormatLinearPCM; audioFormat.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked; audioFormat.mFramesPerPacket = 1; audioFormat.mChannelsPerFrame = 1; audioFormat.mBitsPerChannel = 16; audioFormat.mBytesPerPacket = 2; audioFormat.mBytesPerFrame = 2; [...] read more

AUGraph variSpeed didn't accept StreamFormat on iOS 5.x

I have a AUGraph to Play and Record Audio with this Setup: RemoteIO -> -> RemoteIO Mulichannel Mixer -> variSpeed Read Callback -> -> Write Callback My Problem is that the kAudioUnitSubType_Varispeed didn't accept the StreamFormat on iOS 5.x. On iOS 6 is works. Without the correct StreamFormat the AUGraph [...] read more

iPad app crash on launch : Help me analyze this crash log

Some user's of our iPad application are reporting a crash on launch of the application. Though I have the same device (and the same OS version 4.2.1) I am unable to replicate the crash on my device. I managed to get this crash log from ITC but unsure if this [...] read more

Get AVAudioEngineGraph programmatically

In my app I created an AVAudioEngine and attached AVAudioNodes on it. * Is it possible to get the attached nodes programmatically? * Is it possible to get the nodes connected to a given AVAudioNode? When I log the engine's description I can see all the AVAudioEngineGraph, but I cannot [...] read more

Is it Possible To Play Back Two or More FilePlayer Audio Units in an AUGraph?

Targeting iOS, I want to playback two .caf audio files simultaneously. I've created a simple AUGraph comprised of two "Generator" Audio Units (subtype kAudioUnitSubType_AudioFilePlayer) connected to a multichannel mixer AU which is connected to the remote IO (output scope). I can successfully play back one of the files with just [...] read more

Cannot set input volume of MultiChanelMixer AudioUnit bus

I am trying to use CoreAudio/AudioToolbox to play multiple MIDI files using different MIDISynth nodes. I have the samplers wired into a MultiChanelMixer which is in turn wired into the IO unit. I want to be able to change the different input volumes independently of one another. I'm attempting this [...] read more

Format error setting up AudioQueue for recording, but only happens once in a while

So oddly, this error happens only once in a while, when we are setting up the audio queue (even though I'm doing everything the same way). Device iPhone 5, iOS8.3: mediaserverd[37] <Error>: 15:14:24.594 ERROR: [0x2883000] >aq> 323: AudioConverterNew from AudioQueueNew returned 'fmt?' io: 0 ch, 44100 Hz, 'lpcm' (0x00000029) 32-bit [...] read more

using AudioUnit Reverb2 - error at AUGraphInitialize

I use Apple's example code iPhoneMixerEQGraphTest https://developer.apple.com/library/ios/samplecode/iPhoneMixerEQGraphTest/Introduction/Intro.html and simply exchanged the AudioUnit iPodEQ by a Reverb2 (same error when using a Delay instead) I found the hint to insert a converter unit before the reverb, what I did. Whatever I tried so far, AUGraphInitialze returns error FFFFD58C This is the [...] read more

iOS AUGraph connecting kAudioUnitSubType_Reverb2 unit between Mixer and kAudioUnitSubType_RemoteIO

In my AuGraph I have following situation: sampler ---------> mixer ----> remoteIO 6 callbacks -----> AudioUnitGraph 0x311E02A: Member Nodes: node 1: 'auou' 'rioc' 'appl', instance 0xc66c020 O node 2: 'aumx' 'mcmx' 'appl', instance 0x598f20 O node 3: 'aumu' 'samp' 'appl', instance 0x59ba40 O Connections: node 3 bus 0 => node [...] read more

How to write Output of AUGraph to an External AudioFile of WAV or AIF formats?

In my iOS app i am playing a MIDI file using Music Player & Music Sequence. And i'm getting AUGraph here by calling "MusicSequenceGetAUGraph" method of the Music Sequence. Now i want to save the same Output of this AUGraph to an External File. How can i do that? Can [...] read more

Audio Unit to capture sound from mic, add reverb ,then send to speaker

Sorry to bother again. I used the audio graph processing method to play the mic-in and add effect to the sound to the speaker. When I use the AUGraph_1 : RIO_input->Converter-> AUiPodE->RIO_output, it works fine and I can hear the sound play back. But when I use the AUGraph_2 : [...] read more