diff --git a/include/media/MediaExtractorPluginApi.h b/include/media/MediaExtractorPluginApi.h
index 30c2b05..930b6e2 100644
--- a/include/media/MediaExtractorPluginApi.h
+++ b/include/media/MediaExtractorPluginApi.h
@@ -23,10 +23,17 @@
 
 struct MediaTrack;
 class MetaDataBase;
-class DataSourceBase;
 
 extern "C" {
 
+struct CDataSource {
+    ssize_t (*readAt)(void *handle, off64_t offset, void *data, size_t size);
+    status_t (*getSize)(void *handle, off64_t *size);
+    uint32_t (*flags)(void *handle );
+    bool (*getUri)(void *handle, char *uriString, size_t bufferSize);
+    void *handle;
+};
+
 struct CMediaExtractor {
     void *data;
 
@@ -44,7 +51,7 @@
     const char * (*name)(void *data);
 };
 
-typedef CMediaExtractor* (*CreatorFunc)(DataSourceBase *source, void *meta);
+typedef CMediaExtractor* (*CreatorFunc)(CDataSource *source, void *meta);
 typedef void (*FreeMetaFunc)(void *meta);
 
 // The sniffer can optionally fill in an opaque object, "meta", that helps
@@ -52,7 +59,7 @@
 // effort already exerted by the sniffer. If "freeMeta" is given, it will be
 // called against the opaque object when it is no longer used.
 typedef CreatorFunc (*SnifferFunc)(
-        DataSourceBase *source, float *confidence,
+        CDataSource *source, float *confidence,
         void **meta, FreeMetaFunc *freeMeta);
 
 typedef struct {
diff --git a/include/media/MediaExtractorPluginHelper.h b/include/media/MediaExtractorPluginHelper.h
index 465f76a..c817b30 100644
--- a/include/media/MediaExtractorPluginHelper.h
+++ b/include/media/MediaExtractorPluginHelper.h
@@ -18,6 +18,7 @@
 
 #define MEDIA_EXTRACTOR_PLUGIN_HELPER_H_
 
+#include <arpa/inet.h>
 #include <stdio.h>
 #include <vector>
 
@@ -117,6 +118,136 @@
     return wrapper;
 }
 
+/* adds some convience methods */
+class DataSourceHelper {
+public:
+    explicit DataSourceHelper(CDataSource *csource) {
+        mSource = csource;
+    }
+
+    explicit DataSourceHelper(DataSourceHelper *source) {
+        mSource = source->mSource;
+    }
+
+    ssize_t readAt(off64_t offset, void *data, size_t size) {
+        return mSource->readAt(mSource->handle, offset, data, size);
+    }
+
+    status_t getSize(off64_t *size) {
+        return mSource->getSize(mSource->handle, size);
+    }
+
+    bool getUri(char *uriString, size_t bufferSize) {
+        return mSource->getUri(mSource->handle, uriString, bufferSize);
+    }
+
+    uint32_t flags() {
+        return mSource->flags(mSource->handle);
+    }
+
+    // Convenience methods:
+    bool getUInt16(off64_t offset, uint16_t *x) {
+        *x = 0;
+
+        uint8_t byte[2];
+        if (readAt(offset, byte, 2) != 2) {
+            return false;
+        }
+
+        *x = (byte[0] << 8) | byte[1];
+
+        return true;
+    }
+
+    // 3 byte int, returned as a 32-bit int
+    bool getUInt24(off64_t offset, uint32_t *x) {
+        *x = 0;
+
+        uint8_t byte[3];
+        if (readAt(offset, byte, 3) != 3) {
+            return false;
+        }
+
+        *x = (byte[0] << 16) | (byte[1] << 8) | byte[2];
+
+        return true;
+    }
+
+    bool getUInt32(off64_t offset, uint32_t *x) {
+        *x = 0;
+
+        uint32_t tmp;
+        if (readAt(offset, &tmp, 4) != 4) {
+            return false;
+        }
+
+        *x = ntohl(tmp);
+
+        return true;
+    }
+
+    bool getUInt64(off64_t offset, uint64_t *x) {
+        *x = 0;
+
+        uint64_t tmp;
+        if (readAt(offset, &tmp, 8) != 8) {
+            return false;
+        }
+
+        *x = ((uint64_t)ntohl(tmp & 0xffffffff) << 32) | ntohl(tmp >> 32);
+
+        return true;
+    }
+
+    // read either int<N> or int<2N> into a uint<2N>_t, size is the int size in bytes.
+    bool getUInt16Var(off64_t offset, uint16_t *x, size_t size) {
+        if (size == 2) {
+            return getUInt16(offset, x);
+        }
+        if (size == 1) {
+            uint8_t tmp;
+            if (readAt(offset, &tmp, 1) == 1) {
+                *x = tmp;
+                return true;
+            }
+        }
+        return false;
+    }
+
+    bool getUInt32Var(off64_t offset, uint32_t *x, size_t size) {
+        if (size == 4) {
+            return getUInt32(offset, x);
+        }
+        if (size == 2) {
+            uint16_t tmp;
+            if (getUInt16(offset, &tmp)) {
+                *x = tmp;
+                return true;
+            }
+        }
+        return false;
+    }
+
+    bool getUInt64Var(off64_t offset, uint64_t *x, size_t size) {
+        if (size == 8) {
+            return getUInt64(offset, x);
+        }
+        if (size == 4) {
+            uint32_t tmp;
+            if (getUInt32(offset, &tmp)) {
+                *x = tmp;
+                return true;
+            }
+        }
+        return false;
+    }
+
+protected:
+    CDataSource *mSource;
+};
+
+
+
 // helpers to create a media_uuid_t from a string literal
 
 // purposely not defined anywhere so that this will fail to link if