Added --stream-piece-selector option.

This option specifies piece selection algorithm used in HTTP/FTP
download. Piece means fixed length segment which is downloaded in
parallel in segmented download. If 'default' is given, aria2 selects
piece so that it reduces the number of establishing connection. This
is reasonable default behaviour because establishing connection is an
expensive operation.  If 'inorder' is given, aria2 selects piece which
has minimum index. Index=0 means first of the file. This will be
useful to view movie while downloading it. --enable-http-pipelining
option may be useful to reduce reconnection overhead.  Please note
that aria2 honors --min-split-size option, so it will be necessary to
specify a reasonable value to --min-split-size option.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/BitfieldMan.h b/src/BitfieldMan.h
index 8fb9de86..817b9ae8 100644
--- a/src/BitfieldMan.h
+++ b/src/BitfieldMan.h
@@ -135,6 +135,16 @@ public:
    const unsigned char* ignoreBitfield,
    size_t ignoreBitfieldLength) const;
 
+  // Stores missing bit index to index. This function selects smallest
+  // index of missing piece, considering minSplitSize.  Set bits in
+  // ignoreBitfield are excluded. Returns true if such bit index is
+  // found. Otherwise returns false.
+  bool getInorderMissingUnusedIndex
+  (size_t& index,
+   size_t minSplitSize,
+   const unsigned char* ignoreBitfield,
+   size_t ignoreBitfieldLength) const;
+
   // affected by filter
   bool getAllMissingIndexes(unsigned char* misbitfield, size_t mislen) const;