1 files changed, 179 insertions, 0 deletions
diff --git a/src/InputStream.cxx b/src/InputStream.cxx
new file mode 100644
index 000000000..8a9f6c66d
--- /dev/null
+++ b/src/InputStream.cxx
@@ -0,0 +1,179 @@
+/*
+ * Copyright (C) 2003-2011 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 "InputRegistry.hxx"
+#include "InputPlugin.hxx"
+#include "input/RewindInputPlugin.hxx"
+#include "util/UriUtil.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+
+#include <assert.h>
+
+static constexpr Domain input_domain("input");
+
+struct input_stream *
+input_stream::Open(const char *url,
+		   Mutex &mutex, Cond &cond,
+		   Error &error)
+{
+	input_plugins_for_each_enabled(plugin) {
+		struct input_stream *is;
+
+		is = plugin->open(url, mutex, cond, error);
+		if (is != NULL) {
+			assert(is->plugin.close != NULL);
+			assert(is->plugin.read != NULL);
+			assert(is->plugin.eof != NULL);
+			assert(!is->seekable || is->plugin.seek != NULL);
+
+			is = input_rewind_open(is);
+
+			return is;
+		} else if (error.IsDefined())
+			return NULL;
+	}
+
+	error.Set(input_domain, "Unrecognized URI");
+	return NULL;
+}
+
+bool
+input_stream::Check(Error &error)
+{
+	return plugin.check == nullptr || plugin.check(this, error);
+}
+
+void
+input_stream::Update()
+{
+	if (plugin.update != nullptr)
+		plugin.update(this);
+}
+
+void
+input_stream::WaitReady()
+{
+	while (true) {
+		Update();
+		if (ready)
+			break;
+
+		cond.wait(mutex);
+	}
+}
+
+void
+input_stream::LockWaitReady()
+{
+	const ScopeLock protect(mutex);
+	WaitReady();
+}
+
+bool
+input_stream::CheapSeeking() const
+{
+	return IsSeekable() && !uri_has_scheme(uri.c_str());
+}
+
+bool
+input_stream::Seek(goffset _offset, int whence, Error &error)
+{
+	if (plugin.seek == nullptr)
+		return false;
+
+	return plugin.seek(this, _offset, whence, error);
+}
+
+bool
+input_stream::LockSeek(goffset _offset, int whence, Error &error)
+{
+	if (plugin.seek == nullptr)
+		return false;
+
+	const ScopeLock protect(mutex);
+	return Seek(_offset, whence, error);
+}
+
+Tag *
+input_stream::ReadTag()
+{
+	return plugin.tag != nullptr
+		? plugin.tag(this)
+		: nullptr;
+}
+
+Tag *
+input_stream::LockReadTag()
+{
+	if (plugin.tag == nullptr)
+		return nullptr;
+
+	const ScopeLock protect(mutex);
+	return ReadTag();
+}
+
+bool
+input_stream::IsAvailable()
+{
+	return plugin.available != nullptr
+		? plugin.available(this)
+		: true;
+}
+
+size_t
+input_stream::Read(void *ptr, size_t _size, Error &error)
+{
+	assert(ptr != NULL);
+	assert(_size > 0);
+
+	return plugin.read(this, ptr, _size, error);
+}
+
+size_t
+input_stream::LockRead(void *ptr, size_t _size, Error &error)
+{
+	assert(ptr != NULL);
+	assert(_size > 0);
+
+	const ScopeLock protect(mutex);
+	return Read(ptr, _size, error);
+}
+
+void
+input_stream::Close()
+{
+	plugin.close(this);
+}
+
+bool
+input_stream::IsEOF()
+{
+	return plugin.eof(this);
+}
+
+bool
+input_stream::LockIsEOF()
+{
+	const ScopeLock protect(mutex);
+	return IsEOF();
+}
+