Mpeg2 TS stream parser for media source.

media/mpeg2/mpeg2ts_psi.h

+// 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.
+
+#ifndef MEDIA_MPEG2_MPEG2TS_PSI_PARSER_H_
+#define MEDIA_MPEG2_MPEG2TS_PSI_PARSER_H_
+
+#include <vector>
+
+#include "base/callback.h"
+#include "base/compiler_specific.h"
+#include "media/base/byte_queue.h"
+#include "media/mpeg2/mpeg2ts_section_parser.h"
+
+namespace media {
+
+class BitReader;
+
+namespace mpeg2ts {
+
+class Mpeg2TsPsiParser : public Mpeg2TsSectionParser {
+ public:
+  Mpeg2TsPsiParser();
+  virtual ~Mpeg2TsPsiParser();
+
+  // Mpeg2TsSectionParser implementation.
+  virtual bool Parse(bool payload_unit_start_indicator,
+                     const uint8* buf, int size) OVERRIDE;
+  virtual void Flush() OVERRIDE;
+
+  // Parse the content of the PSI section.
+  virtual bool ParsePsiSection(BitReader* bit_reader) = 0;
+
+ private:
+  bool ParseInternal(bool payload_unit_start_indicator,
+                     const uint8* buf, int size);
+  void ResetState();
+
+  // Bytes of the current PSI.
+  ByteQueue psi_byte_queue_;
+
+  // Do not start parsing before getting a unit start indicator.
+  bool wait_for_pusi_;
+
+  // Number of leading bytes to discard (pointer field).
+  int leading_bytes_to_discard_;
+
+  DISALLOW_COPY_AND_ASSIGN(Mpeg2TsPsiParser);
+};
+
+}  // namespace mpeg2ts
+}  // namespace media
+
+#endif