Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

1 participants
7518 discussions

by Tim Blechmann

hi all ... another jack newbie question ... sometimes jacks kicks out my application, since the subgraph times out ... basically i have two questions about that: - is there an api function, that tells jack not to kick the application or a callback that tells the application that it has been kicked out? - is it possible to query the time out so that i can adapt the callback that it finished before this time out? thanks ... tim -- mailto:TimBlechmann@gmx.de ICQ: 96771783 http://www.mokabar.tk latest mp3: kMW.mp3 http://mattin.org/mp3.html latest cd: Goh Lee Kwang & Tim Blechmann: Drone http://www.geocities.com/gohleekwangtimblechmannduo/ After one look at this planet any visitor from outer space would say "I want to see the manager." William S. Burroughs

20 years, 8 months

[linux-audio-dev] RE:HELP:porting linux audio driver to RTLinux(rtlinux core driver)

by nobin matthew

Dear friends, The Real problem is, i need dma to fill codec controller FIFO in every 600us(8 samples still in codec FIFO and codec controller is half full, at that time it will generate interrupts), this will generate a sin wave which is used to controll another device. If codec controller did not get data in this period it sents last available sample again and again, thus producing a straight line. In Normal linux (2.4 kernel) interrupts and process scheduling may cause problem. This is the reason for porting linux audio driver to RTlinux and it is not possible to access normal linux driver from RTLinux threads. Nobin Mathew __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 8 months

[linux-audio-dev] XITEL INPORT

by Charles A. Crayne

I have recently acquired a XITEL INPORT device, to capture music from my stereo system, and although [as shown below] it seems to be supported by the FC3 kernel, I have not yet managed to find any way to access the USB data stream. Any clues on how I should proceed? arecord -l **** List of CAPTURE Hardware Devices **** card 0: Solo1 [ESS ES1938 (Solo-1)], device 0: es-1938-1946 [ESS Solo-1] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: Audio [USB Audio], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 /proc/asound/card1 total 0 -r--r--r-- 1 root root 0 Mar 29 17:00 id -rw-r--r-- 1 root root 0 Mar 29 17:00 oss_mixer dr-xr-xr-x 3 root root 0 Mar 29 17:00 pcm0c dr-xr-xr-x 3 root root 0 Mar 29 17:00 pcm0p -r--r--r-- 1 root root 0 Mar 29 17:00 stream0 -r--r--r-- 1 root root 0 Mar 29 17:00 usbbus -r--r--r-- 1 root root 0 Mar 29 17:00 usbid

20 years, 8 months

[linux-audio-dev] HELP:porting linux audio driver to RTLinux(rtlinux core driver)

by nobin matthew

Dear friends, I am porting pxa audio driver to rtlinux (rtlinux pro). I am mainly using pxa-ac97.c & pxa-audio.c(eliminated sound_core.c). I will try to register to two devices /dev/dsp and /dev/mixer in that. Since RTlinux kernel api are not much documented it seems very difficult to port dma and synchronization. Is it possible to use dma in rtlinux(since it needs dynamic memory allocation). I am sending the source code. can anybody tell me how to port this. Nobin Mathew __________________________________ Do you Yahoo!? Yahoo! Personals - Better first dates. More second dates. http://personals.yahoo.com

20 years, 8 months

[linux-audio-dev] ZynAddSubFX 2.2.0 release

by Paul

Hi. I released version 2.2.0 of ZynAddSubFX News: - the VST version of ZynAddSubFX is removed from the instalation until it will be more stable (hope soon :) ) - now, the instrument banks contains over 300 high quality instruments - added "Apply" a button from OscilGen window for PADsynth - added another parameter to ADsynth that controls the amount of all detunes of voices - adaptive harmonics postprocess - improved the VU-meter and added a RMS plot - Dvorak support for Virtual Keyboard - many bugs fixed and code cleanups ZynAddSubFX is a open-source software synthesizer for linux and windows. You can download it from http://zynaddsubfx.sourceforge.net Paul __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

20 years, 8 months

[linux-audio-dev] OSSRI Conference Agenda and Registration Information - most recent

by Susan Cragin

The Open-Source Speech Recognition Initiative is holding its first annual conference, to focus on the state of speech recognition geared toward Linux and the open-source community. DATES: Thursday evening, April 28, to Saturday noon, April 30, 2005. LOCATION: The Old Salt Inn / Lamie's Tavern, 490 Lafayette Road Hampton, NH 03842 USA. http://www.oldsaltnh.com Toll Free: 1.800.805.5050 Direct: 1.603.926.0330 Fax: 1.603.929.0017 Pre-registration not required for day sessions. However, room reservations are due by April 15th to get OSSRI rate ($89) and DSL in-room. CONFERENCE SCHEDULE: THURSDAY, APRIL 28 6:00 - 8:00 PM Registration, cheeses and crackers, socializing.(Cash bar.) FRIDAY, APRIL 29 8:00 - 9:00 Continental Breakfast 9:00 - 9:15 Opening Announcements and Welcome. (Susan Cragin.) 10:00 - 11:00 Discussion of the State of Speech Recognition today, and the issues developing a Linux model. (Led by Eric Johansson.) 11:00 - 12:00 Discussion of Small-Dialogue Applications. (Led by Turner Rentz.) 12:00 - 1:00 Lunch (Included in $55 fee.) 1:00 - 2:00 Demo / Video - NASA's Uses of Speech Recognition. (John Dowding, NASA.) 2:00 - 3:00 Breakout Session - Creating a Tool That Prompts for Speech. 3:00 - 4:00 Probablistic Grammar-Based Language Models for the Open-Microphone Task. (John Dowding.) 4:00 - 5:00 Breakout Session - Quality Problems in Speech-Gathering. SATURDAY, APRIL 30 8:00 - 9:00 Continental Breakfast 9:00 - 10:00 Sphinx as an engine - Current Status and Future Developments. (Willie Walker, Sun Microsystems / Sphinx 4 Developer.) 10:00 - 11:00 Deaf-Voiced Communication Using a Phoenetic Text Display. (Tristram Metcalf.) 11:00 - 11:15 Check-out. Bring luggage to conference room. 11:15 - 12:00 Open. COST: $55 per person includes entire conference and lunch on Saturday. $15 to attend each half-day (no lunch). ABOUT THE LOCATION: Hampton, New Hampshire is located about 1 hour north of Boston, right off Route 95. It is a 5-minute drive to Hampton Beach, a summertime resort, and about 15 minutes to Portsmouth NH, a charming seacoast village with many restaurants and shops. Swimmers should bring wetsuits. Questions, please feel free to contact me directly: Susan Cragin, Clerk, OSSRI susancragin(a)earthlink.net 781-416-1987 home 781-801-6829 cell

20 years, 8 months

[linux-audio-dev] jack and alsa design issue

by Hans Fugal

I'm writing an application that will use alsa in the common case, but be jack-capable. I'm faced with the following design question: Do I wrap the jack part to emulate the read/write of alsa, or do I wrap the alsa part to emulate the callback style of jack? In other words, do I push or pull from the audio segment of the program? As I understand it, alsa can be asynchronous but it requires using SIGIO which doesn't excite me. So I'd have to create another thread that selects and fills a ringbuffer. To adapt jack, I'd have a ringbuffer which is drained when the program pulls the audio. Adapting Jack seems the easier thing to do, but what do you think? -- .O. Hans Fugal | De gustibus non disputandum est. ..O http://hans.fugal.net | Debian, vim, mutt, ruby, text, gpg OOO | WindowMaker, gaim, UTF-8, RISC, JS Bach --------------------------------------------------------------------- GnuPG Fingerprint: 6940 87C5 6610 567F 1E95 CB5E FC98 E8CD E0AA D460

20 years, 8 months

[linux-audio-dev] Oggz 0.9.1 Release

by Conrad Parker

Oggz 0.9.1 Release ------------------ Oggz comprises liboggz and the command-line tools oggzinfo, oggzdump, oggzdiff, oggzmerge, oggzrip and oggz-validate. liboggz is a C library providing a simple programming interface for reading and writing Ogg files and streams. Ogg is an interleaving data container developed by Monty at Xiph.Org, originally to support the Ogg Vorbis audio format. This release is available as a source tarball at: http://www.annodex.net/software/liboggz/download/liboggz-0.9.1.tar.gz New in this release: * Added new oggzinfo tool ------------------------- oggzinfo displays information about the contents of Ogg files. By default it displays basic information such as audio samplerate and video dimensions: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - $ oggzinfo 2004-12-04-cc-theora.ogg Content-Duration: 00:01:54.748 Theora: serialno 1648191042 3442 packets in 251 pages, 13.7 packets/page Video-Framerate: 29.970 fps Video-Width: 160 Video-Height: 128 Vorbis: serialno 0317964026 4935 packets in 138 pages, 35.8 packets/page Audio-Samplerate: 22000 Hz Audio-Channels: 2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - oggzinfo also has options to display the following information for the entire file, and also for each logical bitstream: - length in bytes, kB, MB, GB - average bitrate in bps, kbps, Mbps, Gbps - statistics on page lengths (maximum and standard deviation) - statistics on packet lengths (maximum and standard deviation) The man page for oggzinfo(1) can be read online at: http://www.annodex.net/cgi-bin/man/man2html?query=oggzinfo * Added new oggz-validate tool ------------------------------ oggz-validate checks the ordering of packets within an Ogg file, and also checks that it complies with the Ogg bitstream mapping restrictions. The man page for oggz-validate(1) can be read online at: http://www.annodex.net/cgi-bin/man/man2html?query=oggz-validate * improved oggzdump tool ------------------------ oggzdump now displays packet lengths (in bytes, kB, MB, GB ;-) and timestamps (rather than just byte offsets). It now interprets theora granulepos as a split of keyframe|pframe: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 00:00:07.733: serialno 0539503247, granulepos 89|27, packetno 119: 277 bytes 0000: 506c a908 120e 3d0b 88d7 73e9 7227 227c Pl....= ..s.r'"| 0010: 9f40 7463 f789 87c1 8b79 043b 183c 946f .@tc.....y.;.<.o 0020: d1e3 3e47 0798 9fcd 61a9 f113 e261 d1ec ..>G....a....a.. ... - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - oggzdump now also has a --content-type (or -c) option for specifying the name of a particular bitstream to dump: oggzdump --content-type theora file.ogg will dump only the packets in the theora logical bitstream. The man page for oggzdump(1) can be read online at: http://www.annodex.net/cgi-bin/man/man2html?query=oggzdump * bugfix in oggzdiff tool ------------------------- r1176: fix some typos in oggzdiff which prevented multiple hide options from being specified The man page for oggzdiff(1) can be read online at: http://www.annodex.net/cgi-bin/man/man2html?query=oggzdiff * liboggz: bugfix in raw seeking -------------------------------- liboggz provides seeking by time or byte offsets in multitrack Ogg files. It automatically handles time offsets for files containing Theora, Speex, Vorbis, FLAC and CMML. r1092: fix a bug in raw seeking, where doing a raw seek by bytes and back again by time (to the original time point) hadn't invalidated the cached time offset, hence the second seek was considered unnecessary and skipped. This change correctly invalidates the cached time offset when doing a raw byte seek. * unnecessary optimisations in oggzrip tool ------------------------------------------- Optimised packet filtering: filtering decisions are now made at the start of each logical bitstream, not at every packet. Additionally, the hardcoded limit of extracting no more than 64 logical bitstreams from the input file was removed. The man page for oggzrip(1) can be read online at: http://www.annodex.net/cgi-bin/man/man2html?query=oggzrip About Oggz ---------- Oggz comprises liboggz and the command-line tools oggzinfo, oggzdump, oggzdiff, oggzmerge, oggzrip and oggz-validate. liboggz supports the flexibility afforded by the Ogg file format while presenting the following API niceties: * Full API documentation * Comprehensive test suite of read, write and seeking behavior. The entire test suite can be run under valgrind if available. * Developed and tested on GNU/Linux, Darwin/MacOSX, Win32 and Symbian OS. May work on other Unix-like systems via GNU autoconf. For Win32: nmake Makefiles, Visual Studio .NET 2003 solution files and Visual C++ 6.0 workspace files are provided in the source distribution. * Strict adherence to the formatting requirements of Ogg bitstreams, to ensure that only valid bitstreams are generated; writes can fail if you try to write illegally structured packets. * A simple, callback based open/read/close or open/write/close interface to raw Ogg files. * Writing automatically interleaves with packet queuing, and provides callback based notification when this queue is empty * A customisable seeking abstraction for seeking on multitrack Ogg data. Seeking works easily and reliably on multitrack and multi-codec streams, and can transparently parse Theora, Speex, Vorbis, FLAC, CMML and Ogg Skeleton headers without requiring linking to those libraries. This allows efficient use on servers and other devices that need to parse and seek within Ogg files, but do not need to do a full media decode. Full documentation of the liboggz API, customization and installation, and mux and demux examples can be read online at: http://www.annodex.net/software/liboggz/html/ Tools ----- The Oggz source tarball also contains the following command-line tools, which are useful for debugging and testing Ogg bitstreams: * oggzinfo: Display information about one or more Ogg files and their bitstreams. * oggzdump: Hexdump packets of an Ogg file, or revert an Ogg file from such a hexdump. * oggzdiff: Hexdump the packets of two Ogg files and output differences Oggz is Free Software, available under a BSD-style license. * oggzmerge: Merge Ogg files together, interleaving pages in order of presentation time. * oggzrip: Extract one or more logical bitstreams from an Ogg file. * oggz-validate: Validate the Ogg framing of one or more files. License ------- Oggz is Free Software, available under a BSD style license. More information is available online at the Oggz homepage: http://www.annodex.net/software/liboggz/ enjoy :) -- Conrad Parker Senior Software Engineer, Continuous Media Web, CSIRO Australia http://www.annodex.net/ http://www.ict.csiro.au/cmweb/

20 years, 8 months

[linux-audio-dev] LAC 2005 streaming: please test!

by Joern Nettingsmeier

hi everyone! we are currently setting up a stream network for lac2005 (http://lac.zkm.de) since we are trying to provide video streams for the first time, i would welcome testers to shake out any problems beforehand. our master server is currently open for public testing at http://lac2005.zkm.de:8000. in order to conserve bandwidth, the number of clients is limited. there is one video (un chien andalou by salvador dali) and one audio stream (the jazz tune "melancia" played by a friend of mine) streamed in two different bitrates each. please test them (especially the video stream). since theora streaming is quite bleeding-edge, few distros will support it out-of-the-box. in order to generate some documentation for stream users, we have borrowed frank barknechts wiki, please go to http://footils.org/cms/pydiddy/wiki/LinuxAudioConference2005 and add hints for your own distro. ! note that after this initial test period, the master server will be closed to the public again. during the conference, only relays will be given access. you can tune to one of the relays instead. urls will be posted real soon now. anticipating some bug reports: * yes, the video is black-and-white. * yes, there is some (intentional) distortion in the audio stream. * yes, there is currently no metadata displayed. * yes, the streams are not continous, i.e. your player will quit after the piece ends. * yes, you will see greenish garbage at the beginning. that's your player waiting for a theora keyframe. like last year, there will be irc channels: #lac2005 @ irc.freenode.net for general conference issues and feedback from remote conference participants #lac2005-tech @ irc.freenode.net for stream-related technical issues if you have problems or success stories, share them on the lists or on irc. best, jörn

20 years, 8 months

[linux-audio-dev] jack ports & alignment

by Tim Blechmann

hi all, just a short question about jack ... the pointer that void *jack_port_get_buffer (jack_port_t *, jack_nframes_t); returns, is that 128 bit aligned (for simd use)? thanks ... tim -- mailto:TimBlechmann@gmx.de ICQ: 96771783 http://www.mokabar.tk latest mp3: kMW.mp3 http://mattin.org/mp3.html latest cd: Goh Lee Kwang & Tim Blechmann: Drone http://www.geocities.com/gohleekwangtimblechmannduo/ After one look at this planet any visitor from outer space would say "I want to see the manager." William S. Burroughs

20 years, 8 months

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Linux-audio-dev