1 /*****************************************************************
2 |
3 |    AP4 - stts Atoms
4 |
5 |    Copyright 2002-2008 Axiomatic Systems, LLC
6 |
7 |
8 |    This file is part of Bento4/AP4 (MP4 Atom Processing Library).
9 |
10 |    Unless you have obtained Bento4 under a difference license,
11 |    this version of Bento4 is Bento4|GPL.
12 |    Bento4|GPL is free software; you can redistribute it and/or modify
13 |    it under the terms of the GNU General Public License as published by
14 |    the Free Software Foundation; either version 2, or (at your option)
15 |    any later version.
16 |
17 |    Bento4|GPL is distributed in the hope that it will be useful,
18 |    but WITHOUT ANY WARRANTY; without even the implied warranty of
19 |    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20 |    GNU General Public License for more details.
21 |
22 |    You should have received a copy of the GNU General Public License
23 |    along with Bento4|GPL; see the file COPYING.  If not, write to the
24 |    Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 |    02111-1307, USA.
26 |
27  ****************************************************************/
28 
29 #ifndef _AP4_STTS_ATOM_H_
30 #define _AP4_STTS_ATOM_H_
31 
32 /*----------------------------------------------------------------------
33 |   includes
34 +---------------------------------------------------------------------*/
35 #include "Ap4Array.h"
36 #include "Ap4Atom.h"
37 
38 /*----------------------------------------------------------------------
39 |   AP4_SttsTableEntry
40 +---------------------------------------------------------------------*/
41 class AP4_SttsTableEntry {
42  public:
AP4_SttsTableEntry()43     AP4_SttsTableEntry() :
44         m_SampleCount(0),
45         m_SampleDuration(0) {}
AP4_SttsTableEntry(AP4_UI32 sample_count,AP4_UI32 sample_duration)46     AP4_SttsTableEntry(AP4_UI32 sample_count,
47                        AP4_UI32 sample_duration) :
48         m_SampleCount(sample_count),
49         m_SampleDuration(sample_duration) {}
50 
51     AP4_UI32 m_SampleCount;
52     AP4_UI32 m_SampleDuration;
53 };
54 
55 /*----------------------------------------------------------------------
56 |   AP4_SttsAtom
57 +---------------------------------------------------------------------*/
58 class AP4_SttsAtom : public AP4_Atom
59 {
60 public:
61     AP4_IMPLEMENT_DYNAMIC_CAST_D(AP4_SttsAtom, AP4_Atom)
62 
63     // class methods
64     static AP4_SttsAtom* Create(AP4_Size size, AP4_ByteStream& stream);
65 
66     // methods
67     AP4_SttsAtom();
68     virtual AP4_Result InspectFields(AP4_AtomInspector& inspector);
69     virtual AP4_Result GetDts(AP4_Ordinal sample, AP4_UI64& dts, AP4_UI32* duration = NULL);
70     virtual AP4_Result AddEntry(AP4_UI32 sample_count, AP4_UI32 sample_duration);
71     virtual AP4_Result GetSampleIndexForTimeStamp(AP4_UI64      ts,
72                                                   AP4_Ordinal&  sample_index);
73     virtual AP4_Result WriteFields(AP4_ByteStream& stream);
74 
75 private:
76     // methods
77     AP4_SttsAtom(AP4_UI32        size,
78                  AP4_UI08        version,
79                  AP4_UI32        flags,
80                  AP4_ByteStream& stream);
81 
82     // members
83     AP4_Array<AP4_SttsTableEntry> m_Entries;
84     struct {
85         AP4_Ordinal entry_index;
86         AP4_Ordinal sample;
87         AP4_UI64    dts;
88     } m_LookupCache;
89 };
90 
91 #endif // _AP4_STTS_ATOM_H_
92