From 92c85bd20dc4f55b53cc18887d4a6b9b165447ca Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Thu, 24 Oct 2013 20:33:12 +0200
Subject: decoder/opus: move SeekFindEOS() to OggFind.cxx

---
 src/decoder/OggFind.cxx | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'src/decoder/OggFind.cxx')

diff --git a/src/decoder/OggFind.cxx b/src/decoder/OggFind.cxx
index 9df4c6455..297d925e7 100644
--- a/src/decoder/OggFind.cxx
+++ b/src/decoder/OggFind.cxx
@@ -20,6 +20,8 @@
 #include "config.h"
 #include "OggFind.hxx"
 #include "OggSyncState.hxx"
+#include "InputStream.hxx"
+#include "util/Error.hxx"
 
 bool
 OggFindEOS(OggSyncState &oy, ogg_stream_state &os, ogg_packet &packet)
@@ -35,3 +37,20 @@ OggFindEOS(OggSyncState &oy, ogg_stream_state &os, ogg_packet &packet)
 			return true;
 	}
 }
+
+bool
+OggSeekFindEOS(OggSyncState &oy, ogg_stream_state &os, ogg_packet &packet,
+	       InputStream &is)
+{
+	if (is.size > 0 && is.size - is.offset < 65536)
+		return OggFindEOS(oy, os, packet);
+
+	if (!is.CheapSeeking())
+		return false;
+
+	oy.Reset();
+
+	return is.LockSeek(-65536, SEEK_END, IgnoreError()) &&
+		oy.ExpectPageSeekIn(os) &&
+		OggFindEOS(oy, os, packet);
+}
-- 
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