* grab raw data from microphone and send it to the output @ 2021-02-07 12:33 Ivan Riabtsov 2021-02-07 12:50 ` Greg KH 2021-02-07 12:55 ` Pouya Abbassi 0 siblings, 2 replies; 6+ messages in thread From: Ivan Riabtsov @ 2021-02-07 12:33 UTC (permalink / raw) To: kernelnewbies Hello. There is a task to receive raw data from the microphone and, after some processing, send it to the output (headphones or speakers) to speed up the process, I want to do this at the kernel space, please tell me where to start (which way to look and what to read)? My sound device: "Family 17h (Models 10h-1fh) HD Audio Controller". Thanks Everyone _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: grab raw data from microphone and send it to the output 2021-02-07 12:33 grab raw data from microphone and send it to the output Ivan Riabtsov @ 2021-02-07 12:50 ` Greg KH 2021-02-07 13:38 ` Ivan Riabtsov 2021-02-07 12:55 ` Pouya Abbassi 1 sibling, 1 reply; 6+ messages in thread From: Greg KH @ 2021-02-07 12:50 UTC (permalink / raw) To: Ivan Riabtsov; +Cc: kernelnewbies On Sun, Feb 07, 2021 at 03:33:34PM +0300, Ivan Riabtsov wrote: > Hello. There is a task to receive raw data from the microphone and, > after some processing, send it to the output (headphones or speakers) > to speed up the process, I want to do this at the kernel space, please > tell me where to start (which way to look and what to read)? My sound > device: "Family 17h (Models 10h-1fh) HD Audio Controller". Who is asking you to do such a "task"? _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: grab raw data from microphone and send it to the output 2021-02-07 12:50 ` Greg KH @ 2021-02-07 13:38 ` Ivan Riabtsov 2021-02-07 13:45 ` Greg KH 0 siblings, 1 reply; 6+ messages in thread From: Ivan Riabtsov @ 2021-02-07 13:38 UTC (permalink / raw) To: Greg KH, kernelnewbies I want to experiment with active noise cancellation, i want to receive a wave from an input device (microphone), invert the wave and send it to the output device (headphone or speaker). Therefore, I need a minimum delay. вс, 7 февр. 2021 г. в 15:50, Greg KH <greg@kroah.com>: > > On Sun, Feb 07, 2021 at 03:33:34PM +0300, Ivan Riabtsov wrote: > > Hello. There is a task to receive raw data from the microphone and, > > after some processing, send it to the output (headphones or speakers) > > to speed up the process, I want to do this at the kernel space, please > > tell me where to start (which way to look and what to read)? My sound > > device: "Family 17h (Models 10h-1fh) HD Audio Controller". > > Who is asking you to do such a "task"? _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: grab raw data from microphone and send it to the output 2021-02-07 13:38 ` Ivan Riabtsov @ 2021-02-07 13:45 ` Greg KH 2021-02-07 15:51 ` Ivan Riabtsov 0 siblings, 1 reply; 6+ messages in thread From: Greg KH @ 2021-02-07 13:45 UTC (permalink / raw) To: Ivan Riabtsov; +Cc: kernelnewbies On Sun, Feb 07, 2021 at 04:38:08PM +0300, Ivan Riabtsov wrote: > I want to experiment with active noise cancellation, i want to receive > a wave from an input device (microphone), invert the wave and send it > to the output device (headphone or speaker). Therefore, I need a > minimum delay. Then I strongly suggest you look into a much smaller kernel, on a dedicated tiny microcontroller, as that's what systems that do this today use. But if you just want to try it with your laptop, good luck, latencies in your hardware itself are probably going to prevent this from being possible. greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: grab raw data from microphone and send it to the output 2021-02-07 13:45 ` Greg KH @ 2021-02-07 15:51 ` Ivan Riabtsov 0 siblings, 0 replies; 6+ messages in thread From: Ivan Riabtsov @ 2021-02-07 15:51 UTC (permalink / raw) To: Greg KH, kernelnewbies well, I have a portable microphone and the main source of noise a TV, which is a few meters behind my back, if i put a microphone (for example) in the middle, between a laptop and a TV, it may be possible to compensate for the delay, I repeat, this is all solely for the sake of experiment. вс, 7 февр. 2021 г. в 16:45, Greg KH <greg@kroah.com>: > > On Sun, Feb 07, 2021 at 04:38:08PM +0300, Ivan Riabtsov wrote: > > I want to experiment with active noise cancellation, i want to receive > > a wave from an input device (microphone), invert the wave and send it > > to the output device (headphone or speaker). Therefore, I need a > > minimum delay. > > Then I strongly suggest you look into a much smaller kernel, on a > dedicated tiny microcontroller, as that's what systems that do this > today use. > > But if you just want to try it with your laptop, good luck, latencies in > your hardware itself are probably going to prevent this from being > possible. > > greg k-h _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: grab raw data from microphone and send it to the output 2021-02-07 12:33 grab raw data from microphone and send it to the output Ivan Riabtsov 2021-02-07 12:50 ` Greg KH @ 2021-02-07 12:55 ` Pouya Abbassi 1 sibling, 0 replies; 6+ messages in thread From: Pouya Abbassi @ 2021-02-07 12:55 UTC (permalink / raw) To: Ivan Riabtsov; +Cc: kernelnewbies Hi Ivan. Please consider looking at this question and the comments below it: https://stackoverflow.com/questions/16360378/kernel-module-vs-user-space-application-which-one-is-faster If you need a big speed difference, running your code in kernel-space won't make a huge difference. In either way, you'll get the same CPU cycles. The only thing that I can think of, is using FPGA to do the job. Kernel-space won't do any magic for you. FPGA development is hard and totally different, but it's all magic! - Best regards Pouya On 2/7/21 16:03, Ivan Riabtsov wrote: > Hello. There is a task to receive raw data from the microphone and, > after some processing, send it to the output (headphones or speakers) > to speed up the process, I want to do this at the kernel space, please > tell me where to start (which way to look and what to read)? My sound > device: "Family 17h (Models 10h-1fh) HD Audio Controller". > Thanks Everyone > > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@kernelnewbies.org > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2021-02-07 15:52 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-02-07 12:33 grab raw data from microphone and send it to the output Ivan Riabtsov 2021-02-07 12:50 ` Greg KH 2021-02-07 13:38 ` Ivan Riabtsov 2021-02-07 13:45 ` Greg KH 2021-02-07 15:51 ` Ivan Riabtsov 2021-02-07 12:55 ` Pouya Abbassi
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