Add template class SingleStateQueue

Change-Id: If7e2bc9b2a216524ee9cbb68682e2634933b4973

1 files changed, 35 insertions, 0 deletions

diff --git a/include/private/media/StaticAudioTrackState.h b/include/private/media/StaticAudioTrackState.h
new file mode 100644
index 0000000..46a5946
--- /dev/null
+++ b/include/private/media/StaticAudioTrackState.h
@@ -0,0 +1,35 @@
+/*
+ * 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 STATIC_AUDIO_TRACK_STATE_H
+#define STATIC_AUDIO_TRACK_STATE_H
+
+namespace android {
+
+// Represents a single state of an AudioTrack that was created in static mode (shared memory buffer
+// supplied by the client).  This state needs to be communicated from the client to server.  As this
+// state is too large to be updated atomically without a mutex, and mutexes aren't allowed here, the
+// state is wrapped by a SingleStateQueue.
+struct StaticAudioTrackState {
+    // do not define constructors, destructors, or virtual methods
+    size_t  mLoopStart;
+    size_t  mLoopEnd;
+    int     mLoopCount;
+};
+
+}   // namespace android
+
+#endif  // STATIC_AUDIO_TRACK_STATE_H