1 files changed, 138 insertions, 0 deletions
diff --git a/src/input/InputStream.cxx b/src/input/InputStream.cxx
new file mode 100644
index 000000000..f5efe8ef1
--- /dev/null
+++ b/src/input/InputStream.cxx
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "InputStream.hxx"
+#include "thread/Cond.hxx"
+#include "util/StringUtil.hxx"
+
+#include <assert.h>
+
+InputStream::~InputStream()
+{
+}
+
+bool
+InputStream::Check(gcc_unused Error &error)
+{
+	return true;
+}
+
+void
+InputStream::Update()
+{
+}
+
+void
+InputStream::SetReady()
+{
+	assert(!ready);
+
+	ready = true;
+	cond.broadcast();
+}
+
+void
+InputStream::WaitReady()
+{
+	while (true) {
+		Update();
+		if (ready)
+			break;
+
+		cond.wait(mutex);
+	}
+}
+
+void
+InputStream::LockWaitReady()
+{
+	const ScopeLock protect(mutex);
+	WaitReady();
+}
+
+/**
+ * Is seeking on resources behind this URI "expensive"?  For example,
+ * seeking in a HTTP file requires opening a new connection with a new
+ * HTTP request.
+ */
+gcc_pure
+static bool
+ExpensiveSeeking(const char *uri)
+{
+	return StringStartsWith(uri, "http://") ||
+		StringStartsWith(uri, "https://");
+}
+
+bool
+InputStream::CheapSeeking() const
+{
+	return IsSeekable() && !ExpensiveSeeking(uri.c_str());
+}
+
+bool
+InputStream::Seek(gcc_unused offset_type new_offset,
+		  gcc_unused Error &error)
+{
+	return false;
+}
+
+bool
+InputStream::LockSeek(offset_type _offset, Error &error)
+{
+	const ScopeLock protect(mutex);
+	return Seek(_offset, error);
+}
+
+Tag *
+InputStream::ReadTag()
+{
+	return nullptr;
+}
+
+Tag *
+InputStream::LockReadTag()
+{
+	const ScopeLock protect(mutex);
+	return ReadTag();
+}
+
+bool
+InputStream::IsAvailable()
+{
+	return true;
+}
+
+size_t
+InputStream::LockRead(void *ptr, size_t _size, Error &error)
+{
+	assert(ptr != nullptr);
+	assert(_size > 0);
+
+	const ScopeLock protect(mutex);
+	return Read(ptr, _size, error);
+}
+
+bool
+InputStream::LockIsEOF()
+{
+	const ScopeLock protect(mutex);
+	return IsEOF();
+}
+