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

1 files changed, 31 insertions, 0 deletions

diff --git a/media/utils/include/mediautils/SchedulingPolicyService.h b/media/utils/include/mediautils/SchedulingPolicyService.h
new file mode 100644
index 0000000..a9870d4
--- /dev/null
+++ b/media/utils/include/mediautils/SchedulingPolicyService.h
@@ -0,0 +1,31 @@
+/*
+ * 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.
+ */
+
+#ifndef _ANDROID_SCHEDULING_POLICY_SERVICE_H
+#define _ANDROID_SCHEDULING_POLICY_SERVICE_H
+
+namespace android {
+
+// Request elevated priority for thread tid, whose thread group leader must be pid.
+// The priority parameter is currently restricted to either 1 or 2.
+// The asynchronous parameter should be 'true' to return immediately,
+// after the request is enqueued but not necessarily executed.
+// The default value 'false' means to return after request has been enqueued and executed.
+int requestPriority(pid_t pid, pid_t tid, int32_t prio, bool asynchronous = false);
+
+}   // namespace android
+
+#endif  // _ANDROID_SCHEDULING_POLICY_SERVICE_H