Initial StateMatrix idea using composition and void*

BUG=none
TEST=media_unittests

Review URL: http://codereview.chromium.org/3416001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@65128 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 26 insertions, 0 deletions

diff --git a/media/base/state_matrix.cc b/media/base/state_matrix.cc
new file mode 100644
index 0000000..f0ef07b
--- /dev/null
+++ b/media/base/state_matrix.cc
@@ -0,0 +1,26 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "media/base/state_matrix.h"
+
+#include "base/stl_util-inl.h"
+
+namespace media {
+
+StateMatrix::StateMatrix() {
+}
+
+StateMatrix::~StateMatrix() {
+  STLDeleteValues(&states_);
+}
+
+bool StateMatrix::IsStateDefined(int state) {
+  return states_.find(state) != states_.end();
+}
+
+int StateMatrix::ExecuteHandler(void* instance, int state) {
+  return states_.find(state)->second->ExecuteHandler(instance);
+}
+
+}  // namespace media