Squashed commit of the following:

commit 543e192bf2ae13f573dc4c4e53b239ed4ea00e81
Author: Andreas Huber <andih@google.com>
Date:   Thu Dec 3 11:33:57 2009 -0800

    stagefright now acts as the OMX Master, vendors supply their own plugins through libstagefrighthw. In OpenCore-enabled builds we now sit on top of PVMaster...

commit 3cbfdbd9cecadbb77b63125c62883bf1065884fe
Author: Andreas Huber <andih@google.com>
Date:   Wed Dec 2 12:39:07 2009 -0800

    More OMX infrastructure, stagefright is now taking over the OMX Master, multiplexing all contributing OMX implementations under a common interface.

1 files changed, 61 insertions, 0 deletions

diff --git a/media/libstagefright/omx/OMXMaster.h b/media/libstagefright/omx/OMXMaster.h
new file mode 100644
index 0000000..63cd664
--- /dev/null
+++ b/media/libstagefright/omx/OMXMaster.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2009 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 OMX_MASTER_H_
+
+#define OMX_MASTER_H_
+
+#include <media/stagefright/OMXPluginBase.h>
+
+#include <utils/threads.h>
+#include <utils/KeyedVector.h>
+#include <utils/List.h>
+#include <utils/String8.h>
+
+namespace android {
+
+struct OMXMaster : public OMXPluginBase {
+    OMXMaster();
+    virtual ~OMXMaster();
+
+    virtual OMX_ERRORTYPE makeComponentInstance(
+            const char *name,
+            const OMX_CALLBACKTYPE *callbacks,
+            OMX_PTR appData,
+            OMX_COMPONENTTYPE **component);
+
+    virtual OMX_ERRORTYPE enumerateComponents(
+            OMX_STRING name,
+            size_t size,
+            OMX_U32 index);
+
+private:
+    Mutex mLock;
+    List<OMXPluginBase *> mPlugins;
+    KeyedVector<String8, OMXPluginBase *> mPluginByComponentName;
+    void *mVendorLibHandle;
+
+    void addVendorPlugin();
+    void addPlugin(OMXPluginBase *plugin);
+    void clearPlugins();
+
+    OMXMaster(const OMXMaster &);
+    OMXMaster &operator=(const OMXMaster &);
+};
+
+}  // namespace android
+
+#endif  // OMX_MASTER_H_