Getting names and description of the "Source" devices.
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Getting names and description of the "Source" devices.
 
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Hello,
I am writing a small sound-recording application/applet in C. It will do approx. the same task as this command line. $ gst-launch-0.10 pulsesrc device="xxxx" ! queue ! audioconvert ! vorbisenc ! oggmux ! filesink location=test.oga My platform is GNOME on Ubuntu-Linux 10.04. In my GTK app, I would like to fill a listbox with names and description of the "Source" devices; such as "Audio card X" "Micro phone 1" so the user can select the source of the recording. See the devive= parameter in the above command line. How can I find the device names + description using c and GStreamer libraries? I have poked the "gstreamer-properties" application and it finds the device names like PulseAudio Audio Source (pulsesrc): Device name: alsa_output.pci-0000_04_02.0.analog-stereo.monitor Description: Unknown PulseAudio Audio Source (pulsesrc): Device name: device alsa_input.usb-046d_089d-01-U0x46d0x89d.analog-mono Description: Unknown The device name is ok, but the human readable description is empty/"Unknown". See this picture: http://www.futuredesktop.com/tmp/audio-recorder/picture1.png The device description for Source #0 and #1 are set to "Unknown". However the "pactl list" command shows the description right. http://www.futuredesktop.com/tmp/audio-recorder/picture2.png Source #0 State: RUNNING Name: alsa_output.pci-0000_04_02.0.analog-stereo.monitor <-- I WANT THIS Description: Monitor of SB0400 Audigy2 Value Analog Stereo <--- AND THIS Source #1 State: SUSPENDED Name: alsa_input.usb-046d_089d-01-U0x46d0x89d.analog-mono <- I WANT THIS Description: QuickCam E2500 series Analog Mono <--- AND THIS Test code: http://www.futuredesktop.com/tmp/audio-recorder/t1.c Kindly Gstreamer newbie. Moma Antero M (osmo) www.futuredesktop.org (com) ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Getting names and description of the "Source" devices.
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Re-hello,
This piece of PulseAudio code seems to list the input/output devices; their names and human readable _descriptions_. http://pulseaudio.org/wiki/SampleAsyncDeviceList Should GStreamer be able to do the same? On 07/19/2010 09:25 AM, Osmo Maatta wrote: Hello, ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Getting names and description of the "Source" devices.
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In reply to this post by Osmo Maatta
Osmo Maatta wrote:
> The device name is ok, but the human readable description is > empty/"Unknown". > First you set the device: g_object_set (G_OBJECT (element), "device", device, NULL); and after that you can read the device-name: g_object_get(G_OBJECT(element), "device-name", &devicename, NULL); Agostino ------------------------------------------------------------------------------ This SF.net email is sponsored by Sprint What will you do first with EVO, the first 4G phone? Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Getting names and description of the "Source" devices.
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In reply to this post by Osmo Maatta
Am 19.07.2010 10:25, schrieb Osmo Maatta:
> Hello, > > I am writing a small sound-recording application/applet in C. It will do > approx. the same task as this command line. > $ gst-launch-0.10 pulsesrc device="xxxx" ! queue ! audioconvert ! > vorbisenc ! oggmux ! filesink location=test.oga > > My platform is GNOME on Ubuntu-Linux 10.04. > > In my GTK app, I would like to fill a listbox with names and description > of the "Source" devices; such as > "Audio card X" > "Micro phone 1" > so the user can select the source of the recording. See the devive= > parameter in the above command line. > > How can I find the device names + description using c and GStreamer > libraries? You can use the GstPropertyProbe interface on the audiosrc element. > > I have poked the "gstreamer-properties" application and it finds the > device names like This is available audiosource element and that is retieved from the registry. Stefan > > PulseAudio Audio Source (pulsesrc): > Device name: alsa_output.pci-0000_04_02.0.analog-stereo.monitor > Description: Unknown > > PulseAudio Audio Source (pulsesrc): > Device name: device alsa_input.usb-046d_089d-01-U0x46d0x89d.analog-mono > Description: Unknown > > The device name is ok, but the human readable description is > empty/"Unknown". > > See this picture: > http://www.futuredesktop.com/tmp/audio-recorder/picture1.png > The device description for Source #0 and #1 are set to "Unknown". > > However the "pactl list" command shows the description right. > http://www.futuredesktop.com/tmp/audio-recorder/picture2.png > Source #0 > State: RUNNING > Name: alsa_output.pci-0000_04_02.0.analog-stereo.monitor <-- I WANT THIS > Description: Monitor of SB0400 Audigy2 Value Analog Stereo <--- AND THIS > > Source #1 > State: SUSPENDED > Name: alsa_input.usb-046d_089d-01-U0x46d0x89d.analog-mono <- I WANT THIS > Description: QuickCam E2500 series Analog Mono <--- AND THIS > > Test code: > http://www.futuredesktop.com/tmp/audio-recorder/t1.c > <http://www.futuredesktop.com/tmp/audio-recorder/> > Kindly > Gstreamer newbie. > Moma Antero M (osmo) > www.futuredesktop.org (com) > > > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > > > > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel ------------------------------------------------------------------------------ The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://p.sf.net/sfu/dev2dev-palm _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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