1 files changed, 58 insertions, 0 deletions
diff --git a/src/libdash/include/IDownloadObserver.h b/src/libdash/include/IDownloadObserver.h
new file mode 100644
index 00000000..b78198d4
--- /dev/null
+++ b/src/libdash/include/IDownloadObserver.h
@@ -0,0 +1,58 @@
+/**
+ *  @class      dash::network::IDownloadObserver
+ *  @brief      This interface is needed for informing the application of the state of the download process.
+ *  @details    Informs the application about the download rate and the state of the download.
+ *
+ *  @author     bitmovin Softwareentwicklung OG \n
+ *              Email: libdash-dev@vicky.bitmovin.net
+ *  @version    2.1
+ *  @date       2013
+ *  @copyright  bitmovin Softwareentwicklung OG, All Rights Reserved \n\n
+ *              This source code and its use and distribution, is subject to the terms
+ *              and conditions of the applicable license agreement.
+ */
+
+#ifndef IDOWNLOADOBSERVER_H_
+#define IDOWNLOADOBSERVER_H_
+
+#include "config.h"
+
+namespace dash
+{
+    namespace network
+    {
+        enum DownloadState
+        {
+            NOT_STARTED     = 0,
+            IN_PROGRESS     = 1,
+            REQUEST_ABORT   = 2,
+            ABORTED         = 3,
+            COMPLETED       = 4
+        };
+        class IDownloadObserver
+        {
+            public:
+                virtual ~IDownloadObserver(){}
+
+                /**
+                 *  Informs the dash::network::IDownloadObserver object that the download rate has changed.
+                 *  @param      bytesDownloaded     the number of downloaded bytes
+                 */
+                virtual void OnDownloadRateChanged  (uint64_t bytesDownloaded)  = 0;
+
+                /**
+                 *  Informs the dash::network::IDownloadObserver object that the downloading time has changed.
+                 *  @param      downloadingTime     the time taken for the downloading of this segment in seconds
+                 */
+                virtual void OnDownloadTimeChanged  (double downloadingTime)  = 0;
+
+                /**
+                 *  Informs the dash::network::IDownloadObserver object that the download state has changed.
+                 *  @param      state               the download state
+                 */
+                virtual void OnDownloadStateChanged (DownloadState state)       = 0;
+        };
+    }
+}
+
+#endif /* IDOWNLOADOBSERVER_H_ */