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      1 /* ------------------------------------------------------------------
      2  * Copyright (C) 1998-2009 PacketVideo
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
     13  * express or implied.
     14  * See the License for the specific language governing permissions
     15  * and limitations under the License.
     16  * -------------------------------------------------------------------
     17  */
     18 #define IMPLEMENT_TrackExtendsAtom
     19 
     20 #include "trackextendsatom.h"
     21 
     22 // constructor
     23 PVA_FF_TrackExtendsAtom::PVA_FF_TrackExtendsAtom(uint32 mediaType,
     24         int32 codecType,
     25         uint32 trackId)
     26         : PVA_FF_FullAtom(TRACK_EXTENDS_ATOM, (uint8)0, (uint32)0)
     27 {
     28     _mediaType = mediaType;
     29 
     30     _codecType = codecType;
     31 
     32     _trackId  = trackId;
     33 
     34     _defaultSampleDescriptionIndex = 0;     // all flags are kept 0
     35     _defaultSampleDuration = 0;
     36     _defaultSampleSize = 0;
     37     _defaultSampleFlags = 0;
     38 
     39     recomputeSize();
     40 }
     41 
     42 //destructor
     43 PVA_FF_TrackExtendsAtom::~PVA_FF_TrackExtendsAtom()
     44 {
     45     // do nothing
     46 }
     47 
     48 // return trackId
     49 uint32
     50 PVA_FF_TrackExtendsAtom::getTrackId()
     51 {
     52     return _trackId;
     53 }
     54 
     55 //set value of trackId
     56 void
     57 PVA_FF_TrackExtendsAtom::setTrackId(uint32 trackId)
     58 {
     59     _trackId = trackId;
     60 }
     61 
     62 
     63 // recompute size of atom
     64 void
     65 PVA_FF_TrackExtendsAtom::recomputeSize()
     66 {
     67     int32 size = getDefaultSize();
     68 
     69     size += 4; // For trackId
     70     size += 4; // For sample description
     71     size += 4; // For sample duration
     72     size += 4; // For sample size
     73     size += 4; // For sample flags
     74 
     75     _size = size;
     76 
     77     // Update the parent atom size
     78     if (_pparent != NULL)
     79     {
     80         _pparent->recomputeSize();
     81     }
     82 }
     83 
     84 
     85 // write atom in target file
     86 bool
     87 PVA_FF_TrackExtendsAtom::renderToFileStream(MP4_AUTHOR_FF_FILE_IO_WRAP* fp)
     88 {
     89 
     90     uint32 rendered = 0;
     91 
     92     if (!renderAtomBaseMembers(fp))
     93     {
     94         return false;
     95     }
     96     rendered += getDefaultSize();
     97 
     98     if (!PVA_FF_AtomUtils::render32(fp, _trackId))
     99     {
    100         return false;
    101     }
    102     rendered += 4;
    103 
    104     if (!PVA_FF_AtomUtils::render32(fp, _defaultSampleDescriptionIndex))
    105     {
    106         return false;
    107     }
    108     rendered += 4;
    109 
    110     if (!PVA_FF_AtomUtils::render32(fp, _defaultSampleDuration))
    111     {
    112         return false;
    113     }
    114     rendered += 4;
    115 
    116     if (!PVA_FF_AtomUtils::render32(fp, _defaultSampleSize))
    117     {
    118         return false;
    119     }
    120     rendered += 4;
    121 
    122     if (!PVA_FF_AtomUtils::render32(fp, _defaultSampleFlags))
    123     {
    124         return false;
    125     }
    126     rendered += 4;
    127 
    128     return true;
    129 }
    130