media/mp2t/ts_section_psi.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_MP2T_TS_SECTION_PSI_H_
   6 #define MEDIA_MP2T_TS_SECTION_PSI_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "media/base/byte_queue.h"
  10 #include "media/mp2t/ts_section.h"
  11
  12 namespace media {
  13
  14 class BitReader;
  15
  16 namespace mp2t {
  17
  18 class TsSectionPsi : public TsSection {
  19  public:
  20   TsSectionPsi();
  21   virtual ~TsSectionPsi();
  22
  23   // TsSection implementation.
  24   virtual bool Parse(bool payload_unit_start_indicator,
  25                      const uint8* buf, int size) OVERRIDE;
  26   virtual void Flush() OVERRIDE;
  27   virtual void Reset() OVERRIDE;
  28
  29   // Parse the content of the PSI section.
  30   virtual bool ParsePsiSection(BitReader* bit_reader) = 0;
  31
  32   // Reset the state of the PSI section.
  33   virtual void ResetPsiSection() = 0;
  34
  35  private:
  36   void ResetPsiState();
  37
  38   // Bytes of the current PSI.
  39   ByteQueue psi_byte_queue_;
  40
  41   // Do not start parsing before getting a unit start indicator.
  42   bool wait_for_pusi_;
  43
  44   // Number of leading bytes to discard (pointer field).
  45   int leading_bytes_to_discard_;
  46
  47   DISALLOW_COPY_AND_ASSIGN(TsSectionPsi);
  48 };
  49
  50 }  // namespace mp2t
  51 }  // namespace media
  52
  53 #endif
  54