Add Piece::seek().

[dcpomatic.git] / src / lib / piece.cc

diff --git a/src/lib/piece.cc b/src/lib/piece.cc
index 2a3adcd408ef32acdeacf506d7ebe744450be0ce..2cdc20a5032395a259891a32f20aa733c89166bd 100644 (file)
--- a/src/lib/piece.cc
+++ b/src/lib/piece.cc
@@ -224,3 +224,25 @@ Piece::has_text () const
        return !decoder->text.empty();
 }
 
+
+void
+Piece::seek (shared_ptr<const Film> film, DCPTime time, bool accurate)
+{
+       if (time < position()) {
+               /* Before; seek to the start of the content.  Even if this request is for an inaccurate seek
+                  we must seek this (following) content accurately, otherwise when we come to the end of the current
+                  content we may not start right at the beginning of the next, causing a gap (if the next content has
+                  been trimmed to a point between keyframes, or something).
+                  */
+               decoder->seek (dcp_to_content_time(position(), film), true);
+               done = false;
+       } else if (position() <= time && time < end(film)) {
+               /* During; seek to position */
+               decoder->seek (dcp_to_content_time(time, film), accurate);
+               done = false;
+       } else {
+               /* After; this piece is done */
+               done = true;
+       }
+}
+