CameraService: Use SCHED_FIFO for request queue thread in HFR
- Move SchedulingPolicyService from audioservice to mediautils
- When starting up a high speed stream config, set request queue thread
to SCHED_FIFO using SchedulingPolicyService
Bug: 24227252
Change-Id: I224b59142bd111caf563779f55cddd62385b9bac
diff --git a/media/utils/SchedulingPolicyService.cpp b/media/utils/SchedulingPolicyService.cpp
new file mode 100644
index 0000000..17ee9bc
--- /dev/null
+++ b/media/utils/SchedulingPolicyService.cpp
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "SchedulingPolicyService"
+//#define LOG_NDEBUG 0
+
+#include <binder/IServiceManager.h>
+#include <utils/Mutex.h>
+#include "ISchedulingPolicyService.h"
+#include "mediautils/SchedulingPolicyService.h"
+
+namespace android {
+
+static sp<ISchedulingPolicyService> sSchedulingPolicyService;
+static const String16 _scheduling_policy("scheduling_policy");
+static Mutex sMutex;
+
+int requestPriority(pid_t pid, pid_t tid, int32_t prio, bool asynchronous)
+{
+ // FIXME merge duplicated code related to service lookup, caching, and error recovery
+ int ret;
+ for (;;) {
+ sMutex.lock();
+ sp<ISchedulingPolicyService> sps = sSchedulingPolicyService;
+ sMutex.unlock();
+ if (sps == 0) {
+ sp<IBinder> binder = defaultServiceManager()->checkService(_scheduling_policy);
+ if (binder == 0) {
+ sleep(1);
+ continue;
+ }
+ sps = interface_cast<ISchedulingPolicyService>(binder);
+ sMutex.lock();
+ sSchedulingPolicyService = sps;
+ sMutex.unlock();
+ }
+ ret = sps->requestPriority(pid, tid, prio, asynchronous);
+ if (ret != DEAD_OBJECT) {
+ break;
+ }
+ ALOGW("SchedulingPolicyService died");
+ sMutex.lock();
+ sSchedulingPolicyService.clear();
+ sMutex.unlock();
+ }
+ return ret;
+}
+
+} // namespace android