demux: adaptive: use connection bytesRead instead of readsize

modules/demux/adaptive/http/Chunk.cpp

@@ -234,10 +234,11 @@ block_t * HTTPChunkSource::read(size_t readsize)
             eof = true;
             downloadEndTime = vlc_tick_now();
         }
-        if(ret && p_block->i_buffer &&
+        if(ret && connection->getBytesRead() &&
            downloadEndTime > requestStartTime && type == ChunkType::Segment)
         {
-            connManager->updateDownloadRate(sourceid, p_block->i_buffer,
+            connManager->updateDownloadRate(sourceid,
+                                            connection->getBytesRead(),
                                             downloadEndTime - requestStartTime,
                                             downloadEndTime - responseTime);
         }

modules/demux/adaptive/http/HTTPConnection.cpp

@@ -62,6 +62,11 @@ size_t AbstractConnection::getContentLength() const
     return contentLength;
 }
 
+size_t AbstractConnection::getBytesRead() const
+{
+    return bytesRead;
+}
+
 const std::string & AbstractConnection::getContentType() const
 {
     return contentType;

modules/demux/adaptive/http/HTTPConnection.hpp

@@ -51,6 +51,7 @@ namespace adaptive
                 virtual ssize_t read        (void *p_buffer, size_t len) = 0;
 
                 virtual size_t  getContentLength() const;
+                virtual size_t  getBytesRead() const;
                 virtual const std::string & getContentType() const;
                 virtual const ConnectionParams &getRedirection() const;
                 virtual void    setUsed( bool ) = 0;