Mpeg2 TS stream parser for media source.

media/mp2t/ts_section_pes.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_MP2T_TS_SECTION_PES_H_
+#define MEDIA_MP2T_TS_SECTION_PES_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "media/base/byte_queue.h"
+#include "media/mp2t/ts_section.h"
+
+namespace media {
+namespace mp2t {
+
+class EsParser;
+
+class TsSectionPes : public TsSection {
+ public:
+  explicit TsSectionPes(scoped_ptr<EsParser> es_parser);
+  virtual ~TsSectionPes();
+
+  // TsSection implementation.
+  virtual bool Parse(bool payload_unit_start_indicator,
+                     const uint8* buf, int size) OVERRIDE;
+  virtual void Flush() OVERRIDE;
+  virtual void Reset() OVERRIDE;
+
+ private:
+  // Emit a reassembled PES packet.
+  // Return true if successful.
+  // |emit_for_unknown_size| is used to force emission for PES packets
+  // whose size is unknown.
+  bool Emit(bool emit_for_unknown_size);
+
+  // Parse a PES packet, return true if successful.
+  bool ParseInternal(const uint8* raw_pes, int raw_pes_size);
+
+  void ResetPesState();
+
+  // Bytes of the current PES.
+  ByteQueue pes_byte_queue_;
+
+  // ES parser.
+  scoped_ptr<EsParser> es_parser_;
+
+  // Do not start parsing before getting a unit start indicator.
+  bool wait_for_pusi_;
+
+  // Used to unroll PTS and DTS.
+  bool previous_pts_valid_;
+  int64 previous_pts_;
+  bool previous_dts_valid_;
+  int64 previous_dts_;
+
+  DISALLOW_COPY_AND_ASSIGN(TsSectionPes);
+};
+
+}  // namespace mp2t
+}  // namespace media
+
+#endif
+