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Add popup dialog when MMCSS threads are exhausted

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Robin Gareus 2025-08-16 22:57:03 +02:00
parent 92bcddb437
commit d35faf052e
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2 changed files with 39 additions and 0 deletions
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37
gtk2_ardour/ardour_ui.cc
View file

@ -111,6 +111,10 @@
#include "LuaBridge/LuaBridge.h"
#ifdef PLATFORM_WINDOWS
#include "pbd/windows_mmcss.h"
#endif
#ifdef WINDOWS_VST_SUPPORT
#include <fst.h>
#endif
@ -335,6 +339,7 @@ ARDOUR_UI::ARDOUR_UI (int *argcp, char **argvp[], const char* localedir)
, last_configure_time (0)
, last_peak_grab (0)
, have_disk_speed_dialog_displayed (false)
, have_mmcss_error_dialog_displayed (false)
, _status_bar_visibility (X_("status-bar"))
, _log_not_acknowledged (LogLevelNone)
, duplicate_routes_dialog (0)
@ -421,6 +426,10 @@ ARDOUR_UI::ARDOUR_UI (int *argcp, char **argvp[], const char* localedir)
ARDOUR::Session::VersionMismatch.connect (forever_connections, MISSING_INVALIDATOR, std::bind (&ARDOUR_UI::session_format_mismatch, this, _1, _2), gui_context());
#ifdef PLATFORM_WINDOWS
PBD::MMCSS::MMCSSError.connect (forever_connections, MISSING_INVALIDATOR, std::bind (&ARDOUR_UI::mmcss_error_handler, this), gui_context());
#endif
/* handle dialog requests */
ARDOUR::Session::Dialog.connect (forever_connections, MISSING_INVALIDATOR, std::bind (&ARDOUR_UI::session_dialog, this, _1), gui_context());
@ -575,6 +584,7 @@ ARDOUR_UI::engine_stopped ()
ActionManager::set_sensitive (ActionManager::engine_opposite_sensitive_actions, true);
update_sample_rate ();
update_cpu_load ();
have_mmcss_error_dialog_displayed = false;
}
void
@ -2963,6 +2973,33 @@ ARDOUR_UI::disk_speed_dialog_gone (int /*ignored_response*/, MessageDialog* msg)
delete msg;
}
void
ARDOUR_UI::mmcss_error_handler ()
{
ENSURE_GUI_THREAD (*this, &ARDOUR_UI::mmcss_error_handler)
if (!have_mmcss_error_dialog_displayed) {
have_mmcss_error_dialog_displayed = true;
ArdourMessageDialog msg (_("<b>MMCSS priority can not be set!</b>\n\n"
"Windows Multimedia Class Scheduler Service (MCSS) is used for time-critical audio processing. "
"By default, Microsoft has limited the number of MMCSS threads to 32, and this limit has been reached.\n\n"
"You can reduce the number of process threads in Preferences &gt; Performance, but that may be insufficient, "
"because MCSS threads are also used for Audio and MIDI I/O.\n"
"One solution is to increase the number of available MCSS threads by modifying the windows registry. "
"A tool to do that conveniently can be found <a href=\"https://helpcenter.steinberg.de/hc/en-us/articles/13338094735762-Error-message-on-Windows-MMCSS-priority-cannot-be-set\">here</a>."),
true, MESSAGE_ERROR);
for (auto const& w: msg.get_message_area ()->get_children ()) {
Gtk::Label* l = dynamic_cast<Gtk::Label*> (w);
if (l) {
l->property_track_visited_links() = false;
l->signal_activate_link().connect ([](std::string const& url) { std::cout << url << "\n"; return PBD::open_uri (url); }, false);
}
}
msg.run ();
}
}
void
ARDOUR_UI::session_dialog (std::string msg)
{

2
gtk2_ardour/ardour_ui.h
View file

@ -765,6 +765,8 @@ private:
void disk_speed_dialog_gone (int ignored_response, Gtk::MessageDialog*);
void disk_overrun_handler ();
void disk_underrun_handler ();
bool have_mmcss_error_dialog_displayed;
void mmcss_error_handler ();
void session_format_mismatch (std::string, std::string);