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# Ap4HintTrackReader.h

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    00001 /*****************************************************************
    00002 |
    00003 |    AP4 - Hint Track Reader
    00004 |
    00005 |    Copyright 2002-2005 Gilles Boccon-Gibod & Julien Boeuf
    00006 |
    00007 |
    00008 |    This file is part of Bento4/AP4 (MP4 Atom Processing Library).
    00009 |
    00010 |    Unless you have obtained Bento4 under a difference license,
    00011 |    this version of Bento4 is Bento4|GPL.
    00012 |    Bento4|GPL is free software; you can redistribute it and/or modify
    00013 |    it under the terms of the GNU General Public License as published by
    00014 |    the Free Software Foundation; either version 2, or (at your option)
    00015 |    any later version.
    00016 |
    00017 |    Bento4|GPL is distributed in the hope that it will be useful,
    00018 |    but WITHOUT ANY WARRANTY; without even the implied warranty of
    00019 |    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00020 |    GNU General Public License for more details.
    00021 |
    00022 |    You should have received a copy of the GNU General Public License
    00023 |    along with Bento4|GPL; see the file COPYING.  If not, write to the
    00024 |    Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
    00025 |    02111-1307, USA.
    00026 |
    00027 ****************************************************************/
    00028
    00029 #ifndef _AP4_HINT_TRACK_READER_H_
    00030 #define _AP4_HINT_TRACK_READER_H_
    00031
    00032 /*----------------------------------------------------------------------
    00033 |   includes
    00034 +---------------------------------------------------------------------*/
    00035 #include "Ap4Types.h"
    00036 #include "Ap4Sample.h"
    00037
    00038 /*----------------------------------------------------------------------
    00039 |   class declarations
    00040 +---------------------------------------------------------------------*/
    00041 class AP4_DataBuffer;
    00042 class AP4_Movie;
    00043 class AP4_Track;
    00044 class AP4_RtpSampleData;
    00045 class AP4_RtpPacket;
    00046 class AP4_ImmediateRtpConstructor;
    00047 class AP4_SampleRtpConstructor;
    00048 class AP4_String;
    00049
    00050 /*----------------------------------------------------------------------
    00051 |   AP4_HintTrackReader
    00052 +---------------------------------------------------------------------*/
    00053 class AP4_HintTrackReader
    00054 {
    00055 public:
    00056     // constructor and destructor
    00057     AP4_HintTrackReader(AP4_Track& hint_track,
    00058                         AP4_Movie& movie,
    00059                         AP4_UI32   ssrc = 0); // if 0, random value is chosen
    00060     ~AP4_HintTrackReader();
    00061
    00062     // methods
    00063     AP4_Result      GetNextPacket(AP4_DataBuffer& packet,
    00064                                   AP4_TimeStamp&  ts_ms);
    00065     AP4_Result      SeekToTimeStampMs(AP4_TimeStamp  desired_ts,
    00066                                       AP4_TimeStamp& actual_ts);
    00067     AP4_TimeStamp   GetCurrentTimeStampMs();
    00068     AP4_Result      Rewind();
    00069     AP4_Result      GetSdpText(AP4_String& sdp);
    00070     AP4_Track*      GetMediaTrack() { return m_MediaTrack; }
    00071
    00072 private:
    00073     // methods
    00074     AP4_Result GetRtpSample(AP4_Ordinal index);
    00075     AP4_Result BuildRtpPacket(AP4_RtpPacket*  packet,
    00076                               AP4_DataBuffer& packet_data);
    00077     AP4_Result WriteImmediateRtpData(AP4_ImmediateRtpConstructor* constructor,
    00078                                      AP4_ByteStream*              data_stream);
    00079     AP4_Result WriteSampleRtpData(AP4_SampleRtpConstructor* constructor,
    00080                                   AP4_ByteStream*           data_stream);
    00081
    00082     // members
    00083     AP4_Track&          m_HintTrack;
    00084     AP4_Track*          m_MediaTrack;
    00085     AP4_UI32            m_MediaTimeScale;
    00086     AP4_Sample          m_CurrentHintSample;
    00087     AP4_RtpSampleData*  m_RtpSampleData;
    00088     AP4_UI32            m_Ssrc;
    00089     AP4_Ordinal         m_SampleIndex;
    00090     AP4_Ordinal         m_PacketIndex;
    00091     AP4_UI16            m_RtpSequenceStart;
    00092     AP4_TimeStamp       m_RtpTimeStampStart;
    00093     AP4_UI32            m_RtpTimeScale;
    00094 };
    00095
    00096 #endif // _AP4_HINT_TRACK_READER_H_