Split datasource out of libstagefright

into libdatasource, which contains:
  DataSourceFactory
  (Clear)FileSource
  (Clear)MediaHTTP
  DataURISource
  HTTPBase
  NuCachedSource2

This is needed to break a circular dependency in an upcoming CL.

Test: build, boot

Change-Id: I34d9937235c78f18f51b18945342a0743e209577
Merged-In: I34d9937235c78f18f51b18945342a0743e209577
diff --git a/media/libdatasource/include/datasource/ClearMediaHTTP.h b/media/libdatasource/include/datasource/ClearMediaHTTP.h
new file mode 100644
index 0000000..5440a3a
--- /dev/null
+++ b/media/libdatasource/include/datasource/ClearMediaHTTP.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2018 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 CLEAR_MEDIA_HTTP_H_
+
+#define CLEAR_MEDIA_HTTP_H_
+
+#include <media/stagefright/foundation/AString.h>
+
+#include "HTTPBase.h"
+
+namespace android {
+
+struct MediaHTTPConnection;
+
+struct ClearMediaHTTP : public HTTPBase {
+    ClearMediaHTTP(const sp<MediaHTTPConnection> &conn);
+
+    virtual status_t connect(
+            const char *uri,
+            const KeyedVector<String8, String8> *headers,
+            off64_t offset);
+
+    virtual void close();
+
+    virtual void disconnect();
+
+    virtual status_t initCheck() const;
+
+    virtual ssize_t readAt(off64_t offset, void *data, size_t size);
+
+    virtual status_t getSize(off64_t *size);
+
+    virtual uint32_t flags();
+
+    virtual status_t reconnectAtOffset(off64_t offset);
+
+protected:
+    virtual ~ClearMediaHTTP();
+
+    virtual String8 getUri();
+    virtual String8 getMIMEType() const;
+
+    AString mLastURI;
+
+private:
+    status_t mInitCheck;
+    sp<MediaHTTPConnection> mHTTPConnection;
+
+    KeyedVector<String8, String8> mLastHeaders;
+
+    bool mCachedSizeValid;
+    off64_t mCachedSize;
+
+    DISALLOW_EVIL_CONSTRUCTORS(ClearMediaHTTP);
+};
+
+}  // namespace android
+
+#endif  // CLEAR_MEDIA_HTTP_H_