Adding ChunkDemuxer implementation.

media/webm/webm_parser.h

+// Copyright (c) 2011 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.
+
+#ifndef MEDIA_WEBM_WEBM_PARSER_H_
+#define MEDIA_WEBM_WEBM_PARSER_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+
+namespace media {
+
+// Interface for receiving WebM parser events.
+//
+// Each method is called when an element of the specified type is parsed.
+// The ID of the element that was parsed is given along with the value
+// stored in the element. List elements generate calls at the start and
+// end of the list. Any pointers passed to these methods are only guaranteed
+// to be valid for the life of that call. Each method returns a bool that
+// indicates whether the parsed data is valid. If false is returned
+// then the parse is immediately terminated and an error is reported by the
+// parser.
+class WebMParserClient {
+ public:
+  virtual ~WebMParserClient();
+
+  virtual bool OnListStart(int id) = 0;
+  virtual bool OnListEnd(int id) = 0;
+  virtual bool OnUInt(int id, int64 val) = 0;
+  virtual bool OnFloat(int id, double val) = 0;
+  virtual bool OnBinary(int id, const uint8* data, int size) = 0;
+  virtual bool OnString(int id, const std::string& str) = 0;
+  virtual bool OnSimpleBlock(int track_num, int timecode,
+                             int flags,
+                             const uint8* data, int size) = 0;
+};
+
+// Parses a buffer that contains INFO & TRACKS elements.
+//
+// If the headers were successfully parsed, this method will
+// return the number of bytes parsed. If an error occurs this
+// method returns -1.
+int ParseWebMHeaders(WebMParserClient* client,
+                     const uint8* buf, int size);
+
+// Parses a buffer that contains a CLUSTER element.
+//
+// If a cluster was successfully parsed, this method will
+// return the number of bytes parsed. If an error occurs this
+// method returns -1.
+int ParseWebMCluster(WebMParserClient* client,
+                     const uint8* buf, int size);
+
+}  // namespace media
+
+#endif  // MEDIA_WEBM_WEBM_PARSER_H_