Jack2
1.9.10
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00001 /* 00002 Copyright (C) 2004-2008 Grame 00003 00004 This program is free software; you can redistribute it and/or modify 00005 it under the terms of the GNU Lesser General Public License as published by 00006 the Free Software Foundation; either version 2.1 of the License, or 00007 (at your option) any later version. 00008 00009 This program is distributed in the hope that it will be useful, 00010 but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 GNU Lesser General Public License for more details. 00013 00014 You should have received a copy of the GNU Lesser General Public License 00015 along with this program; if not, write to the Free Software 00016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00017 00018 */ 00019 00020 #include "JackMMCSS.h" 00021 #include "JackError.h" 00022 #include <assert.h> 00023 #include <stdio.h> 00024 00025 namespace Jack 00026 { 00027 00028 avSetMmThreadCharacteristics JackMMCSS::ffMMCSSFun1 = NULL; 00029 avSetMmThreadPriority JackMMCSS::ffMMCSSFun2 = NULL; 00030 avRevertMmThreadCharacteristics JackMMCSS::ffMMCSSFun3 = NULL; 00031 JACK_HANDLE JackMMCSS::fAvrtDll; 00032 00033 std::map<jack_native_thread_t, HANDLE> JackMMCSS::fHandleTable; 00034 00035 JackMMCSS::JackMMCSS() 00036 { 00037 fAvrtDll = LoadJackModule("avrt.dll"); 00038 00039 if (fAvrtDll != NULL) { 00040 ffMMCSSFun1 = (avSetMmThreadCharacteristics)GetJackProc(fAvrtDll, "AvSetMmThreadCharacteristicsA"); 00041 ffMMCSSFun2 = (avSetMmThreadPriority)GetJackProc(fAvrtDll, "AvSetMmThreadPriority"); 00042 ffMMCSSFun3 = (avRevertMmThreadCharacteristics)GetJackProc(fAvrtDll, "AvRevertMmThreadCharacteristics"); 00043 } 00044 } 00045 00046 JackMMCSS::~JackMMCSS() 00047 {} 00048 00049 int JackMMCSS::MMCSSAcquireRealTime(jack_native_thread_t thread) 00050 { 00051 if (fHandleTable.find(thread) != fHandleTable.end()) { 00052 return 0; 00053 } 00054 00055 if (ffMMCSSFun1) { 00056 DWORD dummy = 0; 00057 HANDLE task = ffMMCSSFun1("Pro Audio", &dummy); 00058 if (task == NULL) { 00059 jack_error("AvSetMmThreadCharacteristics error : %d", GetLastError()); 00060 } else if (ffMMCSSFun2(task, AVRT_PRIORITY_CRITICAL)) { 00061 fHandleTable[thread] = task; 00062 jack_log("AvSetMmThreadPriority success"); 00063 return 0; 00064 } else { 00065 jack_error("AvSetMmThreadPriority error : %d", GetLastError()); 00066 } 00067 } 00068 00069 return -1; 00070 } 00071 00072 int JackMMCSS::MMCSSDropRealTime(jack_native_thread_t thread) 00073 { 00074 if (fHandleTable.find(thread) != fHandleTable.end()) { 00075 HANDLE task = fHandleTable[thread]; 00076 if (ffMMCSSFun3(task) == 0) { 00077 jack_error("AvRevertMmThreadCharacteristics error : %d", GetLastError()); 00078 } else { 00079 jack_log("AvRevertMmThreadCharacteristics success"); 00080 } 00081 return 0; 00082 } else { 00083 return -1; 00084 } 00085 } 00086 00087 }