JackAudio

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601 discussions

[Jack-Devel] Cannot access portbuffer memory from C++

by Frank Schäfer

Hello all, I have written a small oscillator application in C++ Fiddling with errors and producing output to see where I am brougt me to a question: I had only ``printf( "Processing ...\n" ); in my process callback. My program started to produce output the moment when ``jack_activate( client );'' is called. Isn't this a bit waste of CPU due to the fact that the process_audio callback copies plenty of data to a port which is not used yet? I'd expect to get output from this (nothing sounding yet) program at the moment when it calls ``jack_connect'' for now I have this in my oscillator constructor: ... code snippet ... make_wave(); jack_activate( client ); //FIXME: throw exception if an error with client activation //FIXME: this should be placed elsewhwere and replaced by: // jack_activate -> jack_connect for port connections // jack_deactivate for port disconnections // the process callback will be called for every activated client // even no port is connected consuming unnecesary CPU power } ... Is this intended behavior? I'll leave the workaround in the comments in my code snippet in place then. I am using JACK 1.9.10 on a Linux x86_64 machine # uname -a Linux frankies 3.13.0-79-lowlatency #123-Ubuntu SMP PREEMPT Cheers Frank

9 years, 1 month

[Jack-Devel] Help for compiling jack2

by JoergSorge

Hi, is it possible to help me building jack2, also for not so technical users? Perhaps, it could then be possible, to help others and complete this page: http://jackaudio.org/faq/build_info.html At first, it’s importend to inform the user about necessary libs for building. In other projects, it's find e.g. in a README. But here, I cannot find it on the page above and also not in the git repo. What I know is: build-essential But what’s are the exact libs for this, not all libs are called like in the error-messages, or we need the dev-variants: Checking for program 'doxygen' : not found Checking for 'alsa' >= 1.0.18 : not found --alsa requires the package alsa >= 1.0.18, but it cannot be found. Checking for 'libffado' >= 1.999.17 : not found --firewire requires the package libffado >= 1.999.17, but it cannot be found. Checking for 'libfreebob' >= 1.0.0 : not found Checking for 'gtkIOStream' >= 1.4.0 : not found Checking for 'eigen3' >= 3.1.2 : not found Checking for 'portaudio-2.0' >= 19 : not found Checking for header windows.h : not found Checking for header mmsystem.h : no Checking for 'celt' >= 0.11.0 : not found Checking for 'celt' >= 0.8.0 : not found Checking for 'celt' >= 0.7.0 : not found Checking for 'celt' >= 0.5.0 : not found Checking for 'opus' >= 0.9.0 : not found Checking for header opus/opus_custom.h : not found Checking for 'samplerate' >= 0 : not found Checking for 'sndfile' >= 0 : not found Thanks, Jörg

9 years, 1 month

[Jack-Devel] Netjack crashes, alignment broken recently

by Xavier Mendez

Just compiled the latest jackd2, and when using Netjack both manager and driver crash after sending parameters. I traced back to this change from 02f74a659, which modifies the network parameter struct: --- a/common/JackNetTool.h +++ b/common/JackNetTool.h @@ -94,9 +94,9 @@ namespace Jack - char fName[JACK_CLIENT_NAME_SIZE]; - char fMasterNetName[JACK_SERVER_NAME_SIZE]; - char fSlaveNetName[JACK_SERVER_NAME_SIZE]; + char fName[JACK_CLIENT_NAME_SIZE+1]; + char fMasterNetName[JACK_SERVER_NAME_SIZE+1]; + char fSlaveNetName[JACK_SERVER_NAME_SIZE+1]; That extra byte for the NUL terminator breaks the alignment, and somehow causes some ints to be sent as little-endian: Sample rate : 12288000 frames per second Period size : 131072 frames per period Reverting the three lines seems to resolve the problem. I don't really see the use for having the NUL terminator go through the network... What do you think? Xavi

9 years, 1 month

[Jack-Devel] JACK1 0.125.0rc1 now available

by Paul Davis

There's a new release candidate of JACK1 now available. Because of the magnitude of a couple of the changes, some wider testing would be appreciated before 0.125.0 can be released. http://jackaudio.org/downloads/jack-audio-connection-kit-0.125.0rc1.tar.gz (tagged in git as 0.125.0.rc1) Changes since 0.124.1, in rough order of significance: * use topological sort when ordering clients. Previous sorting implementation would generate incorrect ordering of clients in some (unusual, but not uncommon) conditions. * in the alsa_midi slave driver, fix hotpug device enumeration. JACK1 will now respond to MIDI devices being connected and disconnected while running. * increase maximum size of a single JACK MIDI event to 64 bytes * in the alsa_midi slave driver, fix thread start/stop handling when freewheeling * add support for jack_port_rename() * drop support for CPU cycle counting clock, use kernel clocksource instead * fix a double-fork that left zombie processes around * improve the validity and usability of the return value of jack_frame_time() * fix failing metadata look up by clearing UUID parsing buffer before use * support unescaped double quotes in $HOME/.jackdrc * fix memory leaks of metata key/value pairs * fix crash caused by incorrect jack_error() format string * remove option help from jackd and point user at documentation * fix problems with garbage keys in metadata * fix out-of-tree builds * update configure.ac to work with current-ish autotools with less errors * use gcc atomics and CLOCK_REALTIME for generic CPU builds * a handful of other minor bug fixes Contributors: Hans-Peter Portner, Fons Adriaensen, Erik de Castro Lopo, Filipe Coehlo, David Robillard, Adrian Knoth, Dominic Sacré, Peter Nelson, Rui Nuno Capela, Robin Gareus, Peter Nelson, Paul Davis

9 years, 1 month

[Jack-Devel] [jackaudio/jack1] 79c1cd: manually-updated version of Tim Real's fix for cli...

by Paul Davis

Branch: refs/heads/master Home: https://github.com/jackaudio/jack1 Commit: 79c1cd035164c637e6056406d341713f3424fee0 https://github.com/jackaudio/jack1/commit/79c1cd035164c637e6056406d341713f3… Author: Paul Davis <paul(a)linuxaudiosystems.com> Date: 2016-03-02 (Wed, 02 Mar 2016) Changed paths: M include/internal.h M libjack/port.c Log Message: ----------- manually-updated version of Tim Real's fix for client-side port object management Commit: ea78c7e06e768a02d6129c43c51473a7f94cfd73 https://github.com/jackaudio/jack1/commit/ea78c7e06e768a02d6129c43c51473a7f… Author: Paul Davis <paul(a)linuxaudiosystems.com> Date: 2016-03-02 (Wed, 02 Mar 2016) Changed paths: M include/engine.h M include/internal.h M jackd/clientengine.c M jackd/engine.c Log Message: ----------- Revert "use topological sort for client ordering (fons adriaensen)" This reverts commit 423931219dd3e3b669fde97786cadae92c066dc1. Compare: https://github.com/jackaudio/jack1/compare/735a3e9b7739...ea78c7e06e76

9 years, 1 month

[Jack-Devel] Windows build audioconnecter

by mark winger

I have been working on a mixer project using Juce, and wish to network the audio using Jack. Simple application would be like a digital snake with the eventual implantation of personal mixes. Running this on unix I can use alsa2jack or zita-a2j. But the audioadapter and netadapter is not part of the windows install package. So I was going to attempt building it myself. According to the readme on github, to build with Microsoft compiler requires vc6. I have serveral versions of visual studio but non that old. The readme also says you can build with gcc, and mingw with sjlj is required but it appears that is it is no longer available with sljl (never used gcc on windws so this is new to me). Is there a current “how to” for building jack for windows? And/Or is there a location I could download the audioadapter and netadapter for the current jack2 version? Thanks. Mark Winger

9 years, 1 month

[Jack-Devel] JackSharp and NAudio.Jack 0.1.0 released

by Thomas Mayer

Hello there, I have just released JackSharp and NAudio.Jack 0.1.0. JackSharp is a C# wrapper around the Jack API for .NET and Mono. NAudio.Jack is a pair of implementations of IWavePlayer and IWaveIn to use JackSharp with the .NET audio framework NAudio. I have tested it on Windows 8.1 and Debian sid (i386 and amd64). These are available on NuGet: https://www.nuget.org/packages/JackSharp/ https://www.nuget.org/packages/Naudio.Jack/ Development is done on Github: https://github.com/residuum/JackSharp Best regards, Thomas -- "Ich komme aus dem Staunen nicht heraus." "Dann bleib halt drin, du Seppel" (Dietmar Dath - Die Abschaffung der Arten) http://www.residuum.org/

9 years, 1 month

[Jack-Devel] [jackaudio/jack1] 735a3e: alsa_midi: stop using duplicated client name as pa...

by Paul Davis

Branch: refs/heads/master Home: https://github.com/jackaudio/jack1 Commit: 735a3e9b77396d1a685b41e310416148c52cadda https://github.com/jackaudio/jack1/commit/735a3e9b77396d1a685b41e310416148c… Author: Paul Davis <paul(a)linuxaudiosystems.com> Date: 2016-02-23 (Tue, 23 Feb 2016) Changed paths: M drivers/alsa_midi/port.c Log Message: ----------- alsa_midi: stop using duplicated client name as part of port name for ALSA MIDI bridge ports

9 years, 1 month

[Jack-Devel] [jackaudio/jack1]

by pauldavisthefirst

Branch: refs/tags/0.125.0rc1 Home: https://github.com/jackaudio/jack1

9 years, 1 month

[Jack-Devel] [jackaudio/jack1]

by pauldavisthefirst

Branch: refs/tags/0.124 Home: https://github.com/jackaudio/jack1

9 years, 1 month

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