88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
/*
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Copyright (C) 2004-2008 Grame
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "JackMMCSS.h"
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#include "JackError.h"
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#include <assert.h>
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#include <stdio.h>
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namespace Jack
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{
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avSetMmThreadCharacteristics JackMMCSS::ffMMCSSFun1 = NULL;
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avSetMmThreadPriority JackMMCSS::ffMMCSSFun2 = NULL;
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avRevertMmThreadCharacteristics JackMMCSS::ffMMCSSFun3 = NULL;
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JACK_HANDLE JackMMCSS::fAvrtDll;
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std::map<jack_native_thread_t, HANDLE> JackMMCSS::fHandleTable;
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JackMMCSS::JackMMCSS()
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{
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fAvrtDll = LoadJackModule("avrt.dll");
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if (fAvrtDll != NULL) {
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ffMMCSSFun1 = (avSetMmThreadCharacteristics)GetJackProc(fAvrtDll, "AvSetMmThreadCharacteristicsA");
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ffMMCSSFun2 = (avSetMmThreadPriority)GetJackProc(fAvrtDll, "AvSetMmThreadPriority");
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ffMMCSSFun3 = (avRevertMmThreadCharacteristics)GetJackProc(fAvrtDll, "AvRevertMmThreadCharacteristics");
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}
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}
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JackMMCSS::~JackMMCSS()
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{}
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int JackMMCSS::MMCSSAcquireRealTime(jack_native_thread_t thread, int priority)
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{
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if (fHandleTable.find(thread) != fHandleTable.end()) {
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return 0;
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}
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if (ffMMCSSFun1) {
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DWORD dummy = 0;
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HANDLE task = ffMMCSSFun1("Pro Audio", &dummy);
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if (task == NULL) {
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jack_error("AvSetMmThreadCharacteristics error : %d", GetLastError());
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} else if (ffMMCSSFun2(task, Jack::AVRT_PRIORITY(priority - BASE_REALTIME_PRIORITY))) {
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fHandleTable[thread] = task;
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jack_log("AvSetMmThreadPriority success");
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return 0;
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} else {
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jack_error("AvSetMmThreadPriority error : %d", GetLastError());
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}
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}
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return -1;
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}
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int JackMMCSS::MMCSSDropRealTime(jack_native_thread_t thread)
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{
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if (fHandleTable.find(thread) != fHandleTable.end()) {
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HANDLE task = fHandleTable[thread];
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if (ffMMCSSFun3(task) == 0) {
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jack_error("AvRevertMmThreadCharacteristics error : %d", GetLastError());
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} else {
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jack_log("AvRevertMmThreadCharacteristics success");
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}
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return 0;
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} else {
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return -1;
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}
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}
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}
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