[Stk] rtaudio - priority and keyboard events
TJF
tjfoerster at web.de
Wed Aug 22 07:44:21 PDT 2012
Hi Gary,
I did this:
//------------------------------------------------
RtAudio::StreamOptions options;
options.flags = RTAUDIO_MINIMIZE_LATENCY;
options.flags = RTAUDIO_SCHEDULE_REALTIME;
options.flags = RTAUDIO_HOG_DEVICE;
options.flags = RTAUDIO_ALSA_USE_DEFAULT;
options.numberOfBuffers = 2;
options.priority = max;
std::cout << "\nPriority min: " << min << std::endl;
std::cout << "\nPriority max: " << max << std::endl;
// min and max are 1 and 99 ...
struct sched_param sched_p;
//std::cout << "\nPriority IST: " << sched_getparam(getpid(),
&sched_p) << std::endl;
std::cout << "\nPriority IST: " << sched_getparam(0, &sched_p) <<
std::endl;
//------------------------------------------------
For the last line I get always "0". I is in an Linux environment with
RT-Kernel (only command-line OS). The same with another "normal" Kernel
and XFCE... The task manager also shows "0".
Do you have any idea?
Regards
Thomas
Am 16.08.2012 06:57, schrieb Gary Scavone:
> Hi Tomas,
>
> The "priority" option is only used if you also set the RTAUDIO_SCHEDULE_REALTIME flag. The priority value (a number) corresponds to the linux realtime scheduling system … I can't remember the valid range of values, though whatever you provide is checked against:
>
> int min = sched_get_priority_min( SCHED_RR );
> int max = sched_get_priority_max( SCHED_RR );
>
> Regards,
>
> --gary
>
> On 2012-08-13, at 9:41 AM, TJF <tjfoerster at web.de> wrote:
>
>> Hi everybody,
>>
>> I am changing some things to bring my Windows application to Linux. I want to use the StreamOption "priority".
>>
>> Am I right to to use it this way (the second line)? May be also a second process - the process name of my application?
>>
>> RtAudio::StreamOptions options;
>> options.priority = ALSA;
>>
>> My other question: In Windows I used system keyboard events like this to control the command-line app from outside:
>>
>> (Ctrl+o)
>> if(GetAsyncKeyState(VK_CONTROL)&&GetAsyncKeyState(0x4F))
>> {
>> ...
>> }
>>
>> For Linux I couln't find something similar. What would be a "light-weight" solution: Using SDL (only keyboard-events)?
>>
>> Thanks a lot!
>> Regards
>> Thomas
>> _______________________________________________
>> Stk mailing list
>> Stk at ccrma.stanford.edu
>> http://ccrma-mail.stanford.edu/mailman/listinfo/stk
>
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