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< li class = "navelem" > < a class = "el" href = "../../dir_39dc0668bd5a501998f94e8b4e546c71.html" > media< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_65f7acfa8cf3a5f1edc11faa2428b914.html" > formats< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_3e9291fd7a18fdecc763294cb2628910.html" > mp4< / a > < / li > < / ul >
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< div class = "title" > box.cc< / div > < / div >
< / div > <!-- header -->
< div class = "contents" >
< div class = "fragment" > < div class = "line" > < a name = "l00001" > < / a > < span class = "lineno" > 1< / span >   < span class = "comment" > // Copyright 2014 Google Inc. All rights reserved.< / span > < / div >
< div class = "line" > < a name = "l00002" > < / a > < span class = "lineno" > 2< / span >   < span class = "comment" > //< / span > < / div >
< div class = "line" > < a name = "l00003" > < / a > < span class = "lineno" > 3< / span >   < span class = "comment" > // Use of this source code is governed by a BSD-style< / span > < / div >
< div class = "line" > < a name = "l00004" > < / a > < span class = "lineno" > 4< / span >   < span class = "comment" > // license that can be found in the LICENSE file or at< / span > < / div >
< div class = "line" > < a name = "l00005" > < / a > < span class = "lineno" > 5< / span >   < span class = "comment" > // https://developers.google.com/open-source/licenses/bsd< / span > < / div >
< div class = "line" > < a name = "l00006" > < / a > < span class = "lineno" > 6< / span >   < / div >
< div class = "line" > < a name = "l00007" > < / a > < span class = "lineno" > 7< / span >   < span class = "preprocessor" > #include " packager/media/formats/mp4/box.h" < / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < span class = "preprocessor" > #include " packager/base/logging.h" < / span > < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < span class = "preprocessor" > #include " packager/media/formats/mp4/box_buffer.h" < / span > < / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < / div >
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< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < span class = "keyword" > namespace < / span > shaka {< / div >
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< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < span class = "keyword" > namespace < / span > media {< / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < span class = "keyword" > namespace < / span > mp4 {< / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < / div >
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< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   Box::Box() : box_size_(0) {}< / div >
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< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   Box::~Box() {}< / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < / div >
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< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > < a class = "line" href = "../../d1/d2d/structshaka_1_1media_1_1mp4_1_1Box.html#a209382fcd42e82a896c29e856627ca52" > 19< / a > < / span >   < span class = "keywordtype" > bool< / span > Box::Parse(< a class = "code" href = "../../d1/dee/classshaka_1_1media_1_1mp4_1_1BoxReader.html" > BoxReader< / a > * reader) {< / div >
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< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   DCHECK(reader);< / div >
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< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < a class = "code" href = "../../d1/da1/classshaka_1_1media_1_1mp4_1_1BoxBuffer.html" > BoxBuffer< / a > buffer(reader);< / div >
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< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < span class = "keywordflow" > return< / span > ReadWriteInternal(& buffer);< / div >
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< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   }< / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   < / div >
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< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > < a class = "line" href = "../../d1/d2d/structshaka_1_1media_1_1mp4_1_1Box.html#a15bd0622fdb129d921287e690f117bde" > 25< / a > < / span >   < span class = "keywordtype" > void< / span > Box::Write(< a class = "code" href = "../../dc/d41/classshaka_1_1media_1_1BufferWriter.html" > BufferWriter< / a > * writer) {< / div >
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< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   DCHECK(writer);< / div >
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< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < span class = "comment" > // Compute and update box size.< / span > < / div >
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< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   uint32_t size = ComputeSize();< / div >
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< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   DCHECK_EQ(size, box_size_);< / div >
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< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   < / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   < span class = "keywordtype" > size_t< / span > buffer_size_before_write = writer-> Size();< / div >
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< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   < a class = "code" href = "../../d1/da1/classshaka_1_1media_1_1mp4_1_1BoxBuffer.html" > BoxBuffer< / a > buffer(writer);< / div >
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< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   CHECK(ReadWriteInternal(& buffer));< / div >
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< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   DCHECK_EQ(box_size_, writer-> Size() - buffer_size_before_write)< / div >
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< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   < < FourCCToString(BoxType());< / div >
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< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   }< / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   < / div >
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< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > < a class = "line" href = "../../d1/d2d/structshaka_1_1media_1_1mp4_1_1Box.html#a57b8837c93d51f5cf03d3862069d509a" > 38< / a > < / span >   < span class = "keywordtype" > void< / span > Box::WriteHeader(< a class = "code" href = "../../dc/d41/classshaka_1_1media_1_1BufferWriter.html" > BufferWriter< / a > * writer) {< / div >
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< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   DCHECK(writer);< / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   < span class = "comment" > // Compute and update box size.< / span > < / div >
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< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   uint32_t size = ComputeSize();< / div >
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< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   DCHECK_EQ(size, box_size_);< / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   < / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   < span class = "keywordtype" > size_t< / span > buffer_size_before_write = writer-> Size();< / div >
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< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   < a class = "code" href = "../../d1/da1/classshaka_1_1media_1_1mp4_1_1BoxBuffer.html" > BoxBuffer< / a > buffer(writer);< / div >
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< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   CHECK(ReadWriteHeaderInternal(& buffer));< / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   DCHECK_EQ(HeaderSize(), writer-> Size() - buffer_size_before_write);< / div >
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< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   }< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   < / div >
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< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > < a class = "line" href = "../../d1/d2d/structshaka_1_1media_1_1mp4_1_1Box.html#aa4e47d0ba81e234707c76ca36e32c1d5" > 50< / a > < / span >   uint32_t Box::ComputeSize() {< / div >
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< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   box_size_ = ComputeSizeInternal();< / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   < span class = "keywordflow" > return< / span > box_size_;< / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   }< / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   < / div >
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< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > < a class = "line" href = "../../d1/d2d/structshaka_1_1media_1_1mp4_1_1Box.html#a8dea1032b6875b763ec06a133933160a" > 55< / a > < / span >   uint32_t Box::HeaderSize()< span class = "keyword" > const < / span > {< / div >
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< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   < span class = "keyword" > const< / span > uint32_t kFourCCSize = 4;< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   < span class = "comment" > // We don' t support 64-bit size.< / span > < / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   < span class = "keywordflow" > return< / span > kFourCCSize + < span class = "keyword" > sizeof< / span > (uint32_t);< / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   }< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   < / div >
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< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > < a class = "line" href = "../../d1/d2d/structshaka_1_1media_1_1mp4_1_1Box.html#a160958fd4dd933f8b760bf61ec0f72c6" > 61< / a > < / span >   < span class = "keywordtype" > bool< / span > Box::ReadWriteHeaderInternal(< a class = "code" href = "../../d1/da1/classshaka_1_1media_1_1mp4_1_1BoxBuffer.html" > BoxBuffer< / a > * buffer) {< / div >
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< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   < span class = "keywordflow" > if< / span > (buffer-> < a class = "code" href = "../../d1/da1/classshaka_1_1media_1_1mp4_1_1BoxBuffer.html#a6f952858fff424e19a05d64f485d3952" > Reading< / a > ()) {< / div >
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< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   < span class = "comment" > // Skip for read mode, which is handled already in BoxReader.< / span > < / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   CHECK(buffer-> ReadWriteUInt32(& box_size_));< / div >
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< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   FourCC fourcc = BoxType();< / div >
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< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   CHECK(buffer-> ReadWriteFourCC(& fourcc));< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   }< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   }< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   < / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   FullBox::FullBox() : version(0), flags(0) {}< / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   FullBox::~FullBox() {}< / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < / div >
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< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > < a class = "line" href = "../../dd/dc1/structshaka_1_1media_1_1mp4_1_1FullBox.html#a21cc4d085f650dc18a20a4dd05cb6750" > 75< / a > < / span >   uint32_t < a class = "code" href = "../../dd/dc1/structshaka_1_1media_1_1mp4_1_1FullBox.html#a21cc4d085f650dc18a20a4dd05cb6750" > FullBox::HeaderSize< / a > ()< span class = "keyword" > const < / span > {< / div >
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< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   < span class = "comment" > // Additional 1-byte version and 3-byte flags.< / span > < / div >
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< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   < span class = "keywordflow" > return< / span > < a class = "code" href = "../../d1/d2d/structshaka_1_1media_1_1mp4_1_1Box.html#a8dea1032b6875b763ec06a133933160a" > Box::HeaderSize< / a > () + 1 + 3;< / div >
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< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   }< / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   < / div >
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< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > < a class = "line" href = "../../dd/dc1/structshaka_1_1media_1_1mp4_1_1FullBox.html#ad72e5a2d0def5bbba75b440d060ef1cf" > 80< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../dd/dc1/structshaka_1_1media_1_1mp4_1_1FullBox.html#ad72e5a2d0def5bbba75b440d060ef1cf" > FullBox::ReadWriteHeaderInternal< / a > (< a class = "code" href = "../../d1/da1/classshaka_1_1media_1_1mp4_1_1BoxBuffer.html" > BoxBuffer< / a > * buffer) {< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   RCHECK(< a class = "code" href = "../../d1/d2d/structshaka_1_1media_1_1mp4_1_1Box.html#a160958fd4dd933f8b760bf61ec0f72c6" > Box::ReadWriteHeaderInternal< / a > (buffer));< / div >
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< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   < / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   uint32_t vflags;< / div >
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< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   < span class = "keywordflow" > if< / span > (buffer-> < a class = "code" href = "../../d1/da1/classshaka_1_1media_1_1mp4_1_1BoxBuffer.html#a6f952858fff424e19a05d64f485d3952" > Reading< / a > ()) {< / div >
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< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   RCHECK(buffer-> ReadWriteUInt32(& vflags));< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   this-> version = vflags > > 24;< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   this-> flags = vflags & 0x00FFFFFF;< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   vflags = (this-> version < < 24) | this-> flags;< / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   RCHECK(buffer-> ReadWriteUInt32(& vflags));< / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   }< / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   }< / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   < / div >
< div class = "line" > < a name = "l00095" > < / a > < span class = "lineno" > 95< / span >   } < span class = "comment" > // namespace mp4< / span > < / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   } < span class = "comment" > // namespace media< / span > < / div >
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< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   } < span class = "comment" > // namespace shaka< / span > < / div >
< div class = "ttc" id = "structshaka_1_1media_1_1mp4_1_1FullBox_html_a21cc4d085f650dc18a20a4dd05cb6750" > < div class = "ttname" > < a href = "../../dd/dc1/structshaka_1_1media_1_1mp4_1_1FullBox.html#a21cc4d085f650dc18a20a4dd05cb6750" > shaka::media::mp4::FullBox::HeaderSize< / a > < / div > < div class = "ttdeci" > uint32_t HeaderSize() const final< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/d4d/box_8cc_source.html#l00075" > box.cc:75< / a > < / div > < / div >
< div class = "ttc" id = "structshaka_1_1media_1_1mp4_1_1FullBox_html_ad72e5a2d0def5bbba75b440d060ef1cf" > < div class = "ttname" > < a href = "../../dd/dc1/structshaka_1_1media_1_1mp4_1_1FullBox.html#ad72e5a2d0def5bbba75b440d060ef1cf" > shaka::media::mp4::FullBox::ReadWriteHeaderInternal< / a > < / div > < div class = "ttdeci" > bool ReadWriteHeaderInternal(BoxBuffer *buffer) final< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/d4d/box_8cc_source.html#l00080" > box.cc:80< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1mp4_1_1BoxBuffer_html" > < div class = "ttname" > < a href = "../../d1/da1/classshaka_1_1media_1_1mp4_1_1BoxBuffer.html" > shaka::media::mp4::BoxBuffer< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dc/dbf/box__buffer_8h_source.html#l00025" > box_buffer.h:25< / a > < / div > < / div >
< div class = "ttc" id = "structshaka_1_1media_1_1mp4_1_1Box_html_a160958fd4dd933f8b760bf61ec0f72c6" > < div class = "ttname" > < a href = "../../d1/d2d/structshaka_1_1media_1_1mp4_1_1Box.html#a160958fd4dd933f8b760bf61ec0f72c6" > shaka::media::mp4::Box::ReadWriteHeaderInternal< / a > < / div > < div class = "ttdeci" > virtual bool ReadWriteHeaderInternal(BoxBuffer *buffer)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/d4d/box_8cc_source.html#l00061" > box.cc:61< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1mp4_1_1BoxBuffer_html_a6f952858fff424e19a05d64f485d3952" > < div class = "ttname" > < a href = "../../d1/da1/classshaka_1_1media_1_1mp4_1_1BoxBuffer.html#a6f952858fff424e19a05d64f485d3952" > shaka::media::mp4::BoxBuffer::Reading< / a > < / div > < div class = "ttdeci" > bool Reading() const < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dc/dbf/box__buffer_8h_source.html#l00040" > box_buffer.h:40< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1BufferWriter_html" > < div class = "ttname" > < a href = "../../dc/d41/classshaka_1_1media_1_1BufferWriter.html" > shaka::media::BufferWriter< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/dd2/buffer__writer_8h_source.html#l00022" > buffer_writer.h:22< / a > < / div > < / div >
< div class = "ttc" id = "structshaka_1_1media_1_1mp4_1_1Box_html_a8dea1032b6875b763ec06a133933160a" > < div class = "ttname" > < a href = "../../d1/d2d/structshaka_1_1media_1_1mp4_1_1Box.html#a8dea1032b6875b763ec06a133933160a" > shaka::media::mp4::Box::HeaderSize< / a > < / div > < div class = "ttdeci" > virtual uint32_t HeaderSize() const < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/d4d/box_8cc_source.html#l00055" > box.cc:55< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1mp4_1_1BoxReader_html" > < div class = "ttname" > < a href = "../../d1/dee/classshaka_1_1media_1_1mp4_1_1BoxReader.html" > shaka::media::mp4::BoxReader< / a > < / div > < div class = "ttdoc" > Class for reading MP4 boxes. < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d2/d92/box__reader_8h_source.html#l00024" > box_reader.h:24< / a > < / div > < / div >
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