Mpeg2 TS stream parser for media source.

media/mpeg2/mpeg2ts_crc.h

Index: media/mpeg2/mpeg2ts_crc.h
diff --git a/media/mpeg2/mpeg2ts_crc.h b/media/mpeg2/mpeg2ts_crc.h
new file mode 100644
index 0000000000000000000000000000000000000000..d1c9b74422d9dcac9d3f6387474f436ecb1997b7
--- /dev/null
+++ b/media/mpeg2/mpeg2ts_crc.h
@@ -0,0 +1,25 @@
+// Copyright (c) 2013 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 "base/basictypes.h"
+
+namespace media {
+namespace mpeg2ts {
+
+class Mpeg2TsCrc {
+ public:
+  Mpeg2TsCrc();
+
+  // Update the CRC using the LSB of |data|.

[acolwell GONE FROM CHROMIUM, 2013/09/05 18:29:10]

nit: s/LSB/LSb/ since you are referring to the least significant bits and not
bytes?

[damienv1, 2013/09/09 23:29:45]

I am referring to bits. Since the signature of this functions has changed, I
don't use LSb anymore ;)

+  void Update(uint32 data, int nbits);
+
+  bool IsValid();
+
+ private:
+  uint32 crc_;
+};
+
+}  // namespace mpeg2ts
+}  // namespace media
+