diff --git a/include/media/IMediaSource.h b/include/media/IMediaSource.h
new file mode 100644
index 0000000..1420120
--- /dev/null
+++ b/include/media/IMediaSource.h
@@ -0,0 +1,130 @@
+/*
+ * 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 IMEDIA_SOURCE_BASE_H_
+
+#define IMEDIA_SOURCE_BASE_H_
+
+#include <binder/IInterface.h>
+#include <media/stagefright/MediaErrors.h>
+
+namespace android {
+
+struct MediaSource;
+class MetaData;
+class MediaBuffer;
+
+class IMediaSource : public IInterface {
+public:
+    DECLARE_META_INTERFACE(MediaSource);
+
+    // To be called before any other methods on this object, except
+    // getFormat().
+    virtual status_t start(MetaData *params = NULL) = 0;
+
+    // Any blocking read call returns immediately with a result of NO_INIT.
+    // It is an error to call any methods other than start after this call
+    // returns. Any buffers the object may be holding onto at the time of
+    // the stop() call are released.
+    // Also, it is imperative that any buffers output by this object and
+    // held onto by callers be released before a call to stop() !!!
+    virtual status_t stop() = 0;
+
+    // Returns the format of the data output by this media source.
+    virtual sp<MetaData> getFormat() = 0;
+
+    // Options that modify read() behaviour. The default is to
+    // a) not request a seek
+    // b) not be late, i.e. lateness_us = 0
+    struct ReadOptions {
+        enum SeekMode {
+            SEEK_PREVIOUS_SYNC,
+            SEEK_NEXT_SYNC,
+            SEEK_CLOSEST_SYNC,
+            SEEK_CLOSEST,
+        };
+
+        ReadOptions();
+
+        // Reset everything back to defaults.
+        void reset();
+
+        void setSeekTo(int64_t time_us, SeekMode mode = SEEK_CLOSEST_SYNC);
+        void clearSeekTo();
+        bool getSeekTo(int64_t *time_us, SeekMode *mode) const;
+
+        void setLateBy(int64_t lateness_us);
+        int64_t getLateBy() const;
+
+        void setNonBlocking();
+        void clearNonBlocking();
+        bool getNonBlocking() const;
+
+    private:
+        enum Options {
+            kSeekTo_Option      = 1,
+        };
+
+        uint32_t mOptions;
+        int64_t mSeekTimeUs;
+        SeekMode mSeekMode;
+        int64_t mLatenessUs;
+        bool mNonBlocking;
+    };
+
+    // Returns a new buffer of data. Call blocks until a
+    // buffer is available, an error is encountered of the end of the stream
+    // is reached.
+    // End of stream is signalled by a result of ERROR_END_OF_STREAM.
+    // A result of INFO_FORMAT_CHANGED indicates that the format of this
+    // MediaSource has changed mid-stream, the client can continue reading
+    // but should be prepared for buffers of the new configuration.
+    virtual status_t read(
+            MediaBuffer **buffer, const ReadOptions *options = NULL) = 0;
+
+    // Causes this source to suspend pulling data from its upstream source
+    // until a subsequent read-with-seek. Currently only supported by
+    // OMXCodec.
+    virtual status_t pause()  = 0;
+
+    // The consumer of this media source requests that the given buffers
+    // are to be returned exclusively in response to read calls.
+    // This will be called after a successful start() and before the
+    // first read() call.
+    // Callee assumes ownership of the buffers if no error is returned.
+    virtual status_t setBuffers(const Vector<MediaBuffer *> & /* buffers */) = 0;
+
+};
+
+class BnMediaSource: public BnInterface<IMediaSource>
+{
+public:
+    virtual status_t    onTransact(uint32_t code, const Parcel& data, Parcel* reply,
+                                uint32_t flags = 0);
+
+    virtual status_t pause() {
+        return ERROR_UNSUPPORTED;
+    }
+
+    virtual status_t setBuffers(const Vector<MediaBuffer *> & /* buffers */) {
+        return ERROR_UNSUPPORTED;
+    }
+};
+
+
+}  // namespace android
+
+#endif  // IMEDIA_SOURCE_BASE_H_