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< title > Shaka Packager SDK: packager/media/codecs/nalu_reader.cc Source File< / title >
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< li class = "navelem" > < a class = "el" href = "../../dir_3f8eec2fc361645de4b1ec14c19fffc7.html" > packager< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_f99dae54fe7170f791f339b952d5067a.html" > media< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_64597db6ac7a9160e951a4226a03f10e.html" > codecs< / a > < / li > < / ul >
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< div class = "fragment" > < div class = "line" > < a name = "l00001" > < / a > < span class = "lineno" > 1< / span >   < span class = "comment" > // Copyright 2016 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/codecs/nalu_reader.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 < iostream> < / span > < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < span class = "preprocessor" > #include " packager/base/logging.h" < / span > < / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < span class = "preprocessor" > #include " packager/media/base/buffer_reader.h" < / span > < / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < span class = "preprocessor" > #include " packager/media/codecs/h264_parser.h" < / span > < / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < span class = "keyword" > namespace < / span > < a class = "code" href = "../../d8/daf/namespaceshaka.html" > shaka< / a > {< / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < span class = "keyword" > namespace < / span > media {< / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < span class = "keyword" > namespace < / span > {< / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < span class = "keyword" > inline< / span > < span class = "keywordtype" > bool< / span > IsStartCode(< span class = "keyword" > const< / span > uint8_t* data) {< / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < span class = "keywordflow" > return< / span > data[0] == 0x00 & & data[1] == 0x00 & & data[2] == 0x01;< / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   }< / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   < span class = "comment" > // Edits |subsamples| given the number of consumed bytes.< / span > < / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   < span class = "keywordtype" > void< / span > UpdateSubsamples(uint64_t consumed_bytes,< / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   std::vector< SubsampleEntry> * subsamples) {< / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   < span class = "keywordflow" > if< / span > (consumed_bytes == 0 || subsamples-> empty()) {< / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   }< / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   < span class = "keywordtype" > size_t< / span > num_entries_to_delete = 0;< / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   < span class = "keywordflow" > for< / span > (SubsampleEntry& subsample : *subsamples) {< / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   < span class = "keywordflow" > if< / span > (subsample.clear_bytes > consumed_bytes) {< / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   subsample.clear_bytes -= consumed_bytes;< / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   consumed_bytes = 0;< / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   }< / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   consumed_bytes -= subsample.clear_bytes;< / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   subsample.clear_bytes = 0;< / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   < / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   < span class = "keywordflow" > if< / span > (subsample.cipher_bytes > consumed_bytes) {< / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   subsample.cipher_bytes -= consumed_bytes;< / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   consumed_bytes = 0;< / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   < span class = "keywordflow" > break< / span > ;< / 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 >   consumed_bytes -= subsample.cipher_bytes;< / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   subsample.cipher_bytes = 0;< / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   ++num_entries_to_delete;< / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   }< / div >
< 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 >   subsamples-> erase(subsamples-> begin(),< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   subsamples-> begin() + num_entries_to_delete);< / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   }< / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   < / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < span class = "keywordtype" > bool< / span > IsNaluLengthEncrypted(< / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   uint8_t nalu_length_size,< / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   < span class = "keyword" > const< / span > std::vector< SubsampleEntry> & subsamples) {< / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   < span class = "keywordflow" > if< / span > (subsamples.empty())< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   < / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   < span class = "keywordflow" > for< / span > (< span class = "keyword" > const< / span > SubsampleEntry& subsample : subsamples) {< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   < span class = "keywordflow" > if< / span > (subsample.clear_bytes > = nalu_length_size) {< / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   }< / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   nalu_length_size -= subsample.clear_bytes;< / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   < span class = "keywordflow" > if< / span > (subsample.cipher_bytes > 0) {< / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   }< / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   }< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   < span class = "comment" > // Ran out of subsamples. Assume the rest is in the clear.< / span > < / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / 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 >   } < span class = "comment" > // namespace< / span > < / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   < / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   Nalu::Nalu() = < span class = "keywordflow" > default< / span > ;< / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   < span class = "keywordtype" > bool< / span > Nalu::Initialize(CodecType type,< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   < span class = "keyword" > const< / span > uint8_t* data,< / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   uint64_t size) {< / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   < span class = "keywordflow" > if< / span > (< a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a7a3b4358f56619fc63fe74525f4eb92b" > type< / a > == Nalu::kH264) {< / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   < span class = "keywordflow" > return< / span > InitializeFromH264(< a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a52dc6f445a09c36a64c634ccc2891489" > data< / a > , size);< / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   DCHECK_EQ(Nalu::kH265, < a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a7a3b4358f56619fc63fe74525f4eb92b" > type< / a > );< / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   < span class = "keywordflow" > return< / span > InitializeFromH265(< a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a52dc6f445a09c36a64c634ccc2891489" > data< / a > , size);< / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   }< / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   }< / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   < / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   < span class = "comment" > // ITU-T H.264 (02/2014) 7.4.1 NAL unit semantics< / span > < / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   < span class = "keywordtype" > bool< / span > Nalu::InitializeFromH264(< span class = "keyword" > const< / span > uint8_t* data, uint64_t size) {< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   DCHECK(< a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a52dc6f445a09c36a64c634ccc2891489" > data< / a > );< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   < span class = "keywordflow" > if< / span > (size == 0)< / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   < span class = "keyword" > const< / span > uint8_t header = < a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a52dc6f445a09c36a64c634ccc2891489" > data< / a > [0];< / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   < span class = "keywordflow" > if< / span > ((header & 0x80) != 0) {< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   LOG(WARNING) < < < span class = "stringliteral" > " forbidden_zero_bit shall be equal to 0 (header 0x" < / span > < / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   < < std::hex < < static_cast< int> (header) < < < span class = "stringliteral" > " )." < / span > ;< / div >
< div class = "line" > < a name = "l00095" > < / a > < span class = "lineno" > 95< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   }< / div >
< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   < / div >
< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   data_ = < a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a52dc6f445a09c36a64c634ccc2891489" > data< / a > ;< / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   header_size_ = 1;< / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   payload_size_ = size - header_size_;< / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   ref_idc_ = (header > > 5) & 0x3;< / div >
< div class = "line" > < a name = "l00102" > < / a > < span class = "lineno" > 102< / span >   type_ = header & 0x1F;< / div >
< div class = "line" > < a name = "l00103" > < / a > < span class = "lineno" > 103< / span >   < / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   < span class = "comment" > // Reserved NAL units are not treated as valid NAL units here.< / span > < / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   < span class = "keywordflow" > if< / span > (type_ == Nalu::H264_Unspecified || type_ == Nalu::H264_Reserved17 ||< / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   type_ == Nalu::H264_Reserved18 || type_ > = Nalu::H264_Reserved22) {< / div >
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   VLOG(1) < < < span class = "stringliteral" > " Unspecified or reserved nal_unit_type " < / span > < < type_< / div >
< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > 108< / span >   < < < span class = "stringliteral" > " (header 0x" < / span > < < std::hex < < static_cast< int> (header) < < < span class = "stringliteral" > " )." < / span > ;< / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   < span class = "comment" > // Allow reserved NAL units. Some encoders and extended codecs use the< / span > < / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   < span class = "comment" > // reserved NAL units to carry their private data.< / span > < / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (type_ == Nalu::H264_IDRSlice || type_ == Nalu::H264_SPS ||< / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   type_ == Nalu::H264_SPSExtension ||< / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   type_ == Nalu::H264_SubsetSPS || type_ == Nalu::H264_PPS) {< / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   < span class = "keywordflow" > if< / span > (ref_idc_ == 0) {< / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   LOG(WARNING) < < < span class = "stringliteral" > " nal_ref_idc shall not be equal to 0 for nalu type " < / span > < / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   < < type_ < < < span class = "stringliteral" > " (header 0x" < / span > < < std::hex< / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   < < < span class = "keyword" > static_cast< < / span > < span class = "keywordtype" > int< / span > < span class = "keyword" > > < / span > (header) < < < span class = "stringliteral" > " )." < / span > ;< / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > 119< / span >   }< / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (type_ == Nalu::H264_SEIMessage ||< / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   (type_ > = Nalu::H264_AUD & & type_ < = Nalu::H264_FillerData)) {< / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   < span class = "keywordflow" > if< / span > (ref_idc_ != 0) {< / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   LOG(WARNING) < < < span class = "stringliteral" > " nal_ref_idc shall be equal to 0 for nalu type " < / span > < < type_< / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   < < < span class = "stringliteral" > " (header 0x" < / span > < < std::hex < < static_cast< int> (header)< / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > 125< / span >   < < < span class = "stringliteral" > " )." < / span > ;< / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   }< / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > 128< / span >   }< / div >
< div class = "line" > < a name = "l00129" > < / a > < span class = "lineno" > 129< / span >   < / div >
< div class = "line" > < a name = "l00130" > < / a > < span class = "lineno" > 130< / span >   is_aud_ = type_ == H264_AUD;< / div >
< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > 131< / span >   is_vcl_ = (type_ > = Nalu::H264_NonIDRSlice & & type_ < = Nalu::H264_IDRSlice);< / div >
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   is_video_slice_ =< / div >
< div class = "line" > < a name = "l00133" > < / a > < span class = "lineno" > 133< / span >   (type_ == Nalu::H264_NonIDRSlice || type_ == Nalu::H264_IDRSlice);< / div >
< div class = "line" > < a name = "l00134" > < / a > < span class = "lineno" > 134< / span >   can_start_access_unit_ =< / div >
< div class = "line" > < a name = "l00135" > < / a > < span class = "lineno" > 135< / span >   (is_vcl_ || type_ == Nalu::H264_AUD || type_ == Nalu::H264_SPS ||< / div >
< div class = "line" > < a name = "l00136" > < / a > < span class = "lineno" > 136< / span >   type_ == Nalu::H264_PPS || type_ == Nalu::H264_SEIMessage ||< / div >
< div class = "line" > < a name = "l00137" > < / a > < span class = "lineno" > 137< / span >   (type_ > = Nalu::H264_PrefixNALUnit & & type_ < = Nalu::H264_Reserved18));< / div >
< div class = "line" > < a name = "l00138" > < / a > < span class = "lineno" > 138< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00139" > < / a > < span class = "lineno" > 139< / span >   }< / div >
< div class = "line" > < a name = "l00140" > < / a > < span class = "lineno" > 140< / span >   < / div >
< div class = "line" > < a name = "l00141" > < / a > < span class = "lineno" > 141< / span >   < span class = "comment" > // ITU-T H.265 (04/2015) 7.4.2.2 NAL unit header semantics< / span > < / div >
< div class = "line" > < a name = "l00142" > < / a > < span class = "lineno" > 142< / span >   < span class = "keywordtype" > bool< / span > Nalu::InitializeFromH265(< span class = "keyword" > const< / span > uint8_t* data, uint64_t size) {< / div >
< div class = "line" > < a name = "l00143" > < / a > < span class = "lineno" > 143< / span >   DCHECK(< a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a52dc6f445a09c36a64c634ccc2891489" > data< / a > );< / div >
< div class = "line" > < a name = "l00144" > < / a > < span class = "lineno" > 144< / span >   < span class = "keywordflow" > if< / span > (size < 2)< / div >
< div class = "line" > < a name = "l00145" > < / a > < span class = "lineno" > 145< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00146" > < / a > < span class = "lineno" > 146< / span >   < span class = "keyword" > const< / span > uint16_t header = (< a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a52dc6f445a09c36a64c634ccc2891489" > data< / a > [0] < < 8) | < a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a52dc6f445a09c36a64c634ccc2891489" > data< / a > [1];< / div >
< div class = "line" > < a name = "l00147" > < / a > < span class = "lineno" > 147< / span >   < span class = "keywordflow" > if< / span > ((header & 0x8000) != 0) {< / div >
< div class = "line" > < a name = "l00148" > < / a > < span class = "lineno" > 148< / span >   LOG(WARNING) < < < span class = "stringliteral" > " forbidden_zero_bit shall be equal to 0 (header 0x" < / span > < / div >
< div class = "line" > < a name = "l00149" > < / a > < span class = "lineno" > 149< / span >   < < std::hex < < header < < < span class = "stringliteral" > " )." < / span > ;< / div >
< div class = "line" > < a name = "l00150" > < / a > < span class = "lineno" > 150< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00151" > < / a > < span class = "lineno" > 151< / span >   }< / div >
< div class = "line" > < a name = "l00152" > < / a > < span class = "lineno" > 152< / span >   < / div >
< div class = "line" > < a name = "l00153" > < / a > < span class = "lineno" > 153< / span >   data_ = < a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a52dc6f445a09c36a64c634ccc2891489" > data< / a > ;< / div >
< div class = "line" > < a name = "l00154" > < / a > < span class = "lineno" > 154< / span >   header_size_ = 2;< / div >
< div class = "line" > < a name = "l00155" > < / a > < span class = "lineno" > 155< / span >   payload_size_ = size - header_size_;< / div >
< div class = "line" > < a name = "l00156" > < / a > < span class = "lineno" > 156< / span >   < / div >
< div class = "line" > < a name = "l00157" > < / a > < span class = "lineno" > 157< / span >   type_ = (header > > 9) & 0x3F;< / div >
< div class = "line" > < a name = "l00158" > < / a > < span class = "lineno" > 158< / span >   nuh_layer_id_ = (header > > 3) & 0x3F;< / div >
< div class = "line" > < a name = "l00159" > < / a > < span class = "lineno" > 159< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > int< / span > nuh_temporal_id_plus1 = header & 0x7;< / div >
< div class = "line" > < a name = "l00160" > < / a > < span class = "lineno" > 160< / span >   < span class = "keywordflow" > if< / span > (nuh_temporal_id_plus1 == 0) {< / div >
< div class = "line" > < a name = "l00161" > < / a > < span class = "lineno" > 161< / span >   LOG(WARNING) < < < span class = "stringliteral" > " nul_temporal_id_plus1 shall not be equal to 0 (header 0x" < / span > < / div >
< div class = "line" > < a name = "l00162" > < / a > < span class = "lineno" > 162< / span >   < < std::hex < < header < < < span class = "stringliteral" > " )." < / span > ;< / div >
< div class = "line" > < a name = "l00163" > < / a > < span class = "lineno" > 163< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00164" > < / a > < span class = "lineno" > 164< / span >   }< / div >
< div class = "line" > < a name = "l00165" > < / a > < span class = "lineno" > 165< / span >   nuh_temporal_id_ = nuh_temporal_id_plus1 - 1;< / div >
< div class = "line" > < a name = "l00166" > < / a > < span class = "lineno" > 166< / span >   < / div >
< div class = "line" > < a name = "l00167" > < / a > < span class = "lineno" > 167< / span >   < span class = "keywordflow" > if< / span > (type_ == Nalu::H265_EOB & & nuh_layer_id_ != 0) {< / div >
< div class = "line" > < a name = "l00168" > < / a > < span class = "lineno" > 168< / span >   LOG(WARNING) < < < span class = "stringliteral" > " nuh_layer_id shall be equal to 0 for nalu type " < / span > < < type_< / div >
< div class = "line" > < a name = "l00169" > < / a > < span class = "lineno" > 169< / span >   < < < span class = "stringliteral" > " (header 0x" < / span > < < std::hex < < header < < < span class = "stringliteral" > " )." < / span > ;< / div >
< div class = "line" > < a name = "l00170" > < / a > < span class = "lineno" > 170< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00171" > < / a > < span class = "lineno" > 171< / span >   }< / div >
< div class = "line" > < a name = "l00172" > < / a > < span class = "lineno" > 172< / span >   < / div >
< div class = "line" > < a name = "l00173" > < / a > < span class = "lineno" > 173< / span >   < span class = "comment" > // Reserved NAL units are not treated as valid NAL units here.< / span > < / div >
< div class = "line" > < a name = "l00174" > < / a > < span class = "lineno" > 174< / span >   < span class = "keywordflow" > if< / span > ((type_ > = Nalu::H265_RSV_VCL_N10 & & type_ < = Nalu::H265_RSV_VCL_R15) ||< / div >
< div class = "line" > < a name = "l00175" > < / a > < span class = "lineno" > 175< / span >   (type_ > = Nalu::H265_RSV_IRAP_VCL22 & & type_ < Nalu::H265_RSV_VCL31) ||< / div >
< div class = "line" > < a name = "l00176" > < / a > < span class = "lineno" > 176< / span >   (type_ > = Nalu::H265_RSV_NVCL41)) {< / div >
< div class = "line" > < a name = "l00177" > < / a > < span class = "lineno" > 177< / span >   VLOG(1) < < < span class = "stringliteral" > " Unspecified or reserved nal_unit_type " < / span > < < type_< / div >
< div class = "line" > < a name = "l00178" > < / a > < span class = "lineno" > 178< / span >   < < < span class = "stringliteral" > " (header 0x" < / span > < < std::hex < < header < < < span class = "stringliteral" > " )." < / span > ;< / div >
< div class = "line" > < a name = "l00179" > < / a > < span class = "lineno" > 179< / span >   < span class = "comment" > // Allow reserved NAL units. Some encoders and extended codecs use the< / span > < / div >
< div class = "line" > < a name = "l00180" > < / a > < span class = "lineno" > 180< / span >   < span class = "comment" > // reserved NAL units to carry their private data. For example, Dolby Vision< / span > < / div >
< div class = "line" > < a name = "l00181" > < / a > < span class = "lineno" > 181< / span >   < span class = "comment" > // uses NAL unit type 62.< / span > < / div >
< div class = "line" > < a name = "l00182" > < / a > < span class = "lineno" > 182< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > ((type_ > = Nalu::H265_BLA_W_LP & & < / div >
< div class = "line" > < a name = "l00183" > < / a > < span class = "lineno" > 183< / span >   type_ < = Nalu::H265_RSV_IRAP_VCL23) ||< / div >
< div class = "line" > < a name = "l00184" > < / a > < span class = "lineno" > 184< / span >   type_ == Nalu::H265_VPS || type_ == Nalu::H265_SPS ||< / div >
< div class = "line" > < a name = "l00185" > < / a > < span class = "lineno" > 185< / span >   type_ == Nalu::H265_EOS || type_ == Nalu::H265_EOB) {< / div >
< div class = "line" > < a name = "l00186" > < / a > < span class = "lineno" > 186< / span >   < span class = "keywordflow" > if< / span > (nuh_temporal_id_ != 0) {< / div >
< div class = "line" > < a name = "l00187" > < / a > < span class = "lineno" > 187< / span >   LOG(WARNING) < < < span class = "stringliteral" > " TemporalId shall be equal to 0 for nalu type " < / span > < < type_< / div >
< div class = "line" > < a name = "l00188" > < / a > < span class = "lineno" > 188< / span >   < < < span class = "stringliteral" > " (header 0x" < / span > < < std::hex < < header < < < span class = "stringliteral" > " )." < / span > ;< / div >
< div class = "line" > < a name = "l00189" > < / a > < span class = "lineno" > 189< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00190" > < / a > < span class = "lineno" > 190< / span >   }< / div >
< div class = "line" > < a name = "l00191" > < / a > < span class = "lineno" > 191< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (type_ == Nalu::H265_TSA_N || type_ == Nalu::H265_TSA_R ||< / div >
< div class = "line" > < a name = "l00192" > < / a > < span class = "lineno" > 192< / span >   (nuh_layer_id_ == 0 & & < / div >
< div class = "line" > < a name = "l00193" > < / a > < span class = "lineno" > 193< / span >   (type_ == Nalu::H265_STSA_N || type_ == Nalu::H265_STSA_R))) {< / div >
< div class = "line" > < a name = "l00194" > < / a > < span class = "lineno" > 194< / span >   < span class = "keywordflow" > if< / span > (nuh_temporal_id_ == 0) {< / div >
< div class = "line" > < a name = "l00195" > < / a > < span class = "lineno" > 195< / span >   LOG(WARNING) < < < span class = "stringliteral" > " TemporalId shall not be equal to 0 for nalu type " < / span > < / div >
< div class = "line" > < a name = "l00196" > < / a > < span class = "lineno" > 196< / span >   < < type_ < < < span class = "stringliteral" > " (header 0x" < / span > < < std::hex < < header < < < span class = "stringliteral" > " )." < / span > ;< / div >
< div class = "line" > < a name = "l00197" > < / a > < span class = "lineno" > 197< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00198" > < / a > < span class = "lineno" > 198< / span >   }< / div >
< div class = "line" > < a name = "l00199" > < / a > < span class = "lineno" > 199< / span >   }< / div >
< div class = "line" > < a name = "l00200" > < / a > < span class = "lineno" > 200< / span >   < / div >
< div class = "line" > < a name = "l00201" > < / a > < span class = "lineno" > 201< / span >   is_aud_ = type_ == H265_AUD;< / div >
< div class = "line" > < a name = "l00202" > < / a > < span class = "lineno" > 202< / span >   is_vcl_ = type_ > = Nalu::H265_TRAIL_N & & type_ < = Nalu::H265_RSV_VCL31;< / div >
< div class = "line" > < a name = "l00203" > < / a > < span class = "lineno" > 203< / span >   is_video_slice_ = is_vcl_;< / div >
< div class = "line" > < a name = "l00204" > < / a > < span class = "lineno" > 204< / span >   can_start_access_unit_ =< / div >
< div class = "line" > < a name = "l00205" > < / a > < span class = "lineno" > 205< / span >   nuh_layer_id_ == 0 & & < / div >
< div class = "line" > < a name = "l00206" > < / a > < span class = "lineno" > 206< / span >   (is_vcl_ || type_ == Nalu::H265_AUD || type_ == Nalu::H265_VPS ||< / div >
< div class = "line" > < a name = "l00207" > < / a > < span class = "lineno" > 207< / span >   type_ == Nalu::H265_SPS || type_ == Nalu::H265_PPS ||< / div >
< div class = "line" > < a name = "l00208" > < / a > < span class = "lineno" > 208< / span >   type_ == Nalu::H265_PREFIX_SEI ||< / div >
< div class = "line" > < a name = "l00209" > < / a > < span class = "lineno" > 209< / span >   (type_ > = Nalu::H265_RSV_NVCL41 & & type_ < = Nalu::H265_RSV_NVCL44) ||< / div >
< div class = "line" > < a name = "l00210" > < / a > < span class = "lineno" > 210< / span >   (type_ > = Nalu::H265_UNSPEC48 & & type_ < = Nalu::H265_UNSPEC55));< / div >
< div class = "line" > < a name = "l00211" > < / a > < span class = "lineno" > 211< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00212" > < / a > < span class = "lineno" > 212< / span >   }< / div >
< div class = "line" > < a name = "l00213" > < / a > < span class = "lineno" > 213< / span >   < / div >
< div class = "line" > < a name = "l00214" > < / a > < span class = "lineno" > < a class = "line" href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#a2d1611fe3e60fc6570fe0c21e13911b0" > 214< / a > < / span >   < a class = "code" href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#a2d1611fe3e60fc6570fe0c21e13911b0" > NaluReader::NaluReader< / a > (Nalu::CodecType type,< / div >
< div class = "line" > < a name = "l00215" > < / a > < span class = "lineno" > 215< / span >   uint8_t nal_length_size,< / div >
< div class = "line" > < a name = "l00216" > < / a > < span class = "lineno" > 216< / span >   < span class = "keyword" > const< / span > uint8_t* stream,< / div >
< div class = "line" > < a name = "l00217" > < / a > < span class = "lineno" > 217< / span >   uint64_t stream_size)< / div >
< div class = "line" > < a name = "l00218" > < / a > < span class = "lineno" > 218< / span >   : < a class = "code" href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html" > NaluReader< / a > (type,< / div >
< div class = "line" > < a name = "l00219" > < / a > < span class = "lineno" > 219< / span >   nal_length_size,< / div >
< div class = "line" > < a name = "l00220" > < / a > < span class = "lineno" > 220< / span >   stream,< / div >
< div class = "line" > < a name = "l00221" > < / a > < span class = "lineno" > 221< / span >   stream_size,< / div >
< div class = "line" > < a name = "l00222" > < / a > < span class = "lineno" > 222< / span >   std::vector< < a class = "code" href = "../../d1/d34/structshaka_1_1media_1_1SubsampleEntry.html" > SubsampleEntry< / a > > ()) {}< / div >
< div class = "line" > < a name = "l00223" > < / a > < span class = "lineno" > 223< / span >   < / div >
< div class = "line" > < a name = "l00224" > < / a > < span class = "lineno" > < a class = "line" href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#a6890eb05c83bb540af84494ed0590c6b" > 224< / a > < / span >   < a class = "code" href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#a2d1611fe3e60fc6570fe0c21e13911b0" > NaluReader::NaluReader< / a > (Nalu::CodecType type,< / div >
< div class = "line" > < a name = "l00225" > < / a > < span class = "lineno" > 225< / span >   uint8_t nal_length_size,< / div >
< div class = "line" > < a name = "l00226" > < / a > < span class = "lineno" > 226< / span >   < span class = "keyword" > const< / span > uint8_t* stream,< / div >
< div class = "line" > < a name = "l00227" > < / a > < span class = "lineno" > 227< / span >   uint64_t stream_size,< / div >
< div class = "line" > < a name = "l00228" > < / a > < span class = "lineno" > 228< / span >   < span class = "keyword" > const< / span > std::vector< SubsampleEntry> & subsamples)< / div >
< div class = "line" > < a name = "l00229" > < / a > < span class = "lineno" > 229< / span >   : stream_(stream),< / div >
< div class = "line" > < a name = "l00230" > < / a > < span class = "lineno" > 230< / span >   stream_size_(stream_size),< / div >
< div class = "line" > < a name = "l00231" > < / a > < span class = "lineno" > 231< / span >   nalu_type_(type),< / div >
< div class = "line" > < a name = "l00232" > < / a > < span class = "lineno" > 232< / span >   nalu_length_size_(nal_length_size),< / div >
< div class = "line" > < a name = "l00233" > < / a > < span class = "lineno" > 233< / span >   format_(nal_length_size == 0 ? kAnnexbByteStreamFormat< / div >
< div class = "line" > < a name = "l00234" > < / a > < span class = "lineno" > 234< / span >   : kNalUnitStreamFormat),< / div >
< div class = "line" > < a name = "l00235" > < / a > < span class = "lineno" > 235< / span >   subsamples_(subsamples) {< / div >
< div class = "line" > < a name = "l00236" > < / a > < span class = "lineno" > 236< / span >   DCHECK(stream);< / div >
< div class = "line" > < a name = "l00237" > < / a > < span class = "lineno" > 237< / span >   }< / div >
< div class = "line" > < a name = "l00238" > < / a > < span class = "lineno" > 238< / span >   < / div >
< div class = "line" > < a name = "l00239" > < / a > < span class = "lineno" > 239< / span >   NaluReader::~NaluReader() {}< / div >
< div class = "line" > < a name = "l00240" > < / a > < span class = "lineno" > 240< / span >   < / div >
< div class = "line" > < a name = "l00241" > < / a > < span class = "lineno" > < a class = "line" href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#ae051f1f92d84acfcd4cc159d972d647a" > 241< / a > < / span >   NaluReader::Result < a class = "code" href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#ae051f1f92d84acfcd4cc159d972d647a" > NaluReader::Advance< / a > (< a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html" > Nalu< / a > * nalu) {< / div >
< div class = "line" > < a name = "l00242" > < / a > < span class = "lineno" > 242< / span >   < span class = "keywordflow" > if< / span > (stream_size_ < = 0)< / div >
< div class = "line" > < a name = "l00243" > < / a > < span class = "lineno" > 243< / span >   < span class = "keywordflow" > return< / span > NaluReader::kEOStream;< / div >
< div class = "line" > < a name = "l00244" > < / a > < span class = "lineno" > 244< / span >   < / div >
< div class = "line" > < a name = "l00245" > < / a > < span class = "lineno" > 245< / span >   uint8_t nalu_length_size_or_start_code_size;< / div >
< div class = "line" > < a name = "l00246" > < / a > < span class = "lineno" > 246< / span >   uint64_t nalu_length;< / div >
< div class = "line" > < a name = "l00247" > < / a > < span class = "lineno" > 247< / span >   < span class = "keywordflow" > if< / span > (format_ == kAnnexbByteStreamFormat) {< / div >
< div class = "line" > < a name = "l00248" > < / a > < span class = "lineno" > 248< / span >   < span class = "comment" > // This will move |stream_| to the start code.< / span > < / div >
< div class = "line" > < a name = "l00249" > < / a > < span class = "lineno" > 249< / span >   uint64_t nalu_length_with_header;< / div >
< div class = "line" > < a name = "l00250" > < / a > < span class = "lineno" > 250< / span >   < span class = "keywordflow" > if< / span > (!LocateNaluByStartCode(& nalu_length_with_header,< / div >
< div class = "line" > < a name = "l00251" > < / a > < span class = "lineno" > 251< / span >   & nalu_length_size_or_start_code_size)) {< / div >
< div class = "line" > < a name = "l00252" > < / a > < span class = "lineno" > 252< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Could not find next NALU, bytes left in stream: " < / span > < / div >
< div class = "line" > < a name = "l00253" > < / a > < span class = "lineno" > 253< / span >   < < stream_size_;< / div >
< div class = "line" > < a name = "l00254" > < / a > < span class = "lineno" > 254< / span >   < span class = "comment" > // This is actually an error. Since we always move to past the end of< / span > < / div >
< div class = "line" > < a name = "l00255" > < / a > < span class = "lineno" > 255< / span >   < span class = "comment" > // each NALU, if there is no next start code, then this is the first call< / span > < / div >
< div class = "line" > < a name = "l00256" > < / a > < span class = "lineno" > 256< / span >   < span class = "comment" > // and there are no start codes in the stream.< / span > < / div >
< div class = "line" > < a name = "l00257" > < / a > < span class = "lineno" > 257< / span >   < span class = "keywordflow" > return< / span > NaluReader::kInvalidStream;< / div >
< div class = "line" > < a name = "l00258" > < / a > < span class = "lineno" > 258< / span >   }< / div >
< div class = "line" > < a name = "l00259" > < / a > < span class = "lineno" > 259< / span >   nalu_length = nalu_length_with_header - nalu_length_size_or_start_code_size;< / div >
< div class = "line" > < a name = "l00260" > < / a > < span class = "lineno" > 260< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00261" > < / a > < span class = "lineno" > 261< / span >   < a class = "code" href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html" > BufferReader< / a > reader(stream_, stream_size_);< / div >
< div class = "line" > < a name = "l00262" > < / a > < span class = "lineno" > 262< / span >   < span class = "keywordflow" > if< / span > (IsNaluLengthEncrypted(nalu_length_size_, subsamples_)) {< / div >
< div class = "line" > < a name = "l00263" > < / a > < span class = "lineno" > 263< / span >   LOG(ERROR) < < < span class = "stringliteral" > " NALU length is encrypted." < / span > ;< / div >
< div class = "line" > < a name = "l00264" > < / a > < span class = "lineno" > 264< / span >   < span class = "keywordflow" > return< / span > NaluReader::kInvalidStream;< / div >
< div class = "line" > < a name = "l00265" > < / a > < span class = "lineno" > 265< / span >   }< / div >
< div class = "line" > < a name = "l00266" > < / a > < span class = "lineno" > 266< / span >   < span class = "keywordflow" > if< / span > (!reader.< a class = "code" href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#ac98c6631c07300a6b78ec58bfd4ced30" > ReadNBytesInto8< / a > (& nalu_length, nalu_length_size_))< / div >
< div class = "line" > < a name = "l00267" > < / a > < span class = "lineno" > 267< / span >   < span class = "keywordflow" > return< / span > NaluReader::kInvalidStream;< / div >
< div class = "line" > < a name = "l00268" > < / a > < span class = "lineno" > 268< / span >   nalu_length_size_or_start_code_size = nalu_length_size_;< / div >
< div class = "line" > < a name = "l00269" > < / a > < span class = "lineno" > 269< / span >   < / div >
< div class = "line" > < a name = "l00270" > < / a > < span class = "lineno" > 270< / span >   < span class = "keywordflow" > if< / span > (nalu_length + nalu_length_size_ > stream_size_) {< / div >
< div class = "line" > < a name = "l00271" > < / a > < span class = "lineno" > 271< / span >   LOG(ERROR) < < < span class = "stringliteral" > " NALU length exceeds stream size: " < / span > < / div >
< div class = "line" > < a name = "l00272" > < / a > < span class = "lineno" > 272< / span >   < < stream_size_ < < < span class = "stringliteral" > " < " < / span > < < nalu_length;< / div >
< div class = "line" > < a name = "l00273" > < / a > < span class = "lineno" > 273< / span >   < span class = "keywordflow" > return< / span > NaluReader::kInvalidStream;< / div >
< div class = "line" > < a name = "l00274" > < / a > < span class = "lineno" > 274< / span >   }< / div >
< div class = "line" > < a name = "l00275" > < / a > < span class = "lineno" > 275< / span >   < span class = "keywordflow" > if< / span > (nalu_length == 0) {< / div >
< div class = "line" > < a name = "l00276" > < / a > < span class = "lineno" > 276< / span >   LOG(ERROR) < < < span class = "stringliteral" > " NALU size 0" < / span > ;< / div >
< div class = "line" > < a name = "l00277" > < / a > < span class = "lineno" > 277< / span >   < span class = "keywordflow" > return< / span > NaluReader::kInvalidStream;< / div >
< div class = "line" > < a name = "l00278" > < / a > < span class = "lineno" > 278< / span >   }< / div >
< div class = "line" > < a name = "l00279" > < / a > < span class = "lineno" > 279< / span >   }< / div >
< div class = "line" > < a name = "l00280" > < / a > < span class = "lineno" > 280< / span >   < / div >
< div class = "line" > < a name = "l00281" > < / a > < span class = "lineno" > 281< / span >   < span class = "keyword" > const< / span > uint8_t* nalu_data = stream_ + nalu_length_size_or_start_code_size;< / div >
< div class = "line" > < a name = "l00282" > < / a > < span class = "lineno" > 282< / span >   < span class = "keywordflow" > if< / span > (!nalu-> Initialize(nalu_type_, nalu_data, nalu_length))< / div >
< div class = "line" > < a name = "l00283" > < / a > < span class = "lineno" > 283< / span >   < span class = "keywordflow" > return< / span > NaluReader::kInvalidStream;< / div >
< div class = "line" > < a name = "l00284" > < / a > < span class = "lineno" > 284< / span >   < / div >
< div class = "line" > < a name = "l00285" > < / a > < span class = "lineno" > 285< / span >   < span class = "comment" > // Move parser state to after this NALU, so next time Advance< / span > < / div >
< div class = "line" > < a name = "l00286" > < / a > < span class = "lineno" > 286< / span >   < span class = "comment" > // is called, we will effectively be skipping it.< / span > < / div >
< div class = "line" > < a name = "l00287" > < / a > < span class = "lineno" > 287< / span >   stream_ += nalu_length_size_or_start_code_size + nalu_length;< / div >
< div class = "line" > < a name = "l00288" > < / a > < span class = "lineno" > 288< / span >   stream_size_ -= nalu_length_size_or_start_code_size + nalu_length;< / div >
< div class = "line" > < a name = "l00289" > < / a > < span class = "lineno" > 289< / span >   UpdateSubsamples(nalu_length_size_or_start_code_size + nalu_length,< / div >
< div class = "line" > < a name = "l00290" > < / a > < span class = "lineno" > 290< / span >   & subsamples_);< / div >
< div class = "line" > < a name = "l00291" > < / a > < span class = "lineno" > 291< / span >   < / div >
< div class = "line" > < a name = "l00292" > < / a > < span class = "lineno" > 292< / span >   DVLOG(4) < < < span class = "stringliteral" > " NALU type: " < / span > < < < span class = "keyword" > static_cast< < / span > < span class = "keywordtype" > int< / span > < span class = "keyword" > > < / span > (nalu-> < a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a7a3b4358f56619fc63fe74525f4eb92b" > type< / a > ())< / div >
< div class = "line" > < a name = "l00293" > < / a > < span class = "lineno" > 293< / span >   < < < span class = "stringliteral" > " at: " < / span > < < < span class = "keyword" > reinterpret_cast< < / span > < span class = "keyword" > const < / span > < span class = "keywordtype" > void< / span > *< span class = "keyword" > > < / span > (nalu-> < a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a52dc6f445a09c36a64c634ccc2891489" > data< / a > ())< / div >
< div class = "line" > < a name = "l00294" > < / a > < span class = "lineno" > 294< / span >   < < < span class = "stringliteral" > " data size: " < / span > < < nalu-> < a class = "code" href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#abe782e4298e7add8ce0a1c33e66cfcdb" > payload_size< / a > ();< / div >
< div class = "line" > < a name = "l00295" > < / a > < span class = "lineno" > 295< / span >   < / div >
< div class = "line" > < a name = "l00296" > < / a > < span class = "lineno" > 296< / span >   < span class = "keywordflow" > return< / span > NaluReader::kOk;< / div >
< div class = "line" > < a name = "l00297" > < / a > < span class = "lineno" > 297< / span >   }< / div >
< div class = "line" > < a name = "l00298" > < / a > < span class = "lineno" > 298< / span >   < / div >
< div class = "line" > < a name = "l00299" > < / a > < span class = "lineno" > < a class = "line" href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#a9ed9d56a06f43717cdb7035f86075975" > 299< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#a9ed9d56a06f43717cdb7035f86075975" > NaluReader::StartsWithStartCode< / a > () {< / div >
< div class = "line" > < a name = "l00300" > < / a > < span class = "lineno" > 300< / span >   < span class = "keywordflow" > if< / span > (stream_size_ > = 3) {< / div >
< div class = "line" > < a name = "l00301" > < / a > < span class = "lineno" > 301< / span >   < span class = "keywordflow" > if< / span > (IsStartCode(stream_))< / div >
< div class = "line" > < a name = "l00302" > < / a > < span class = "lineno" > 302< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00303" > < / a > < span class = "lineno" > 303< / span >   }< / div >
< div class = "line" > < a name = "l00304" > < / a > < span class = "lineno" > 304< / span >   < span class = "keywordflow" > if< / span > (stream_size_ > = 4) {< / div >
< div class = "line" > < a name = "l00305" > < / a > < span class = "lineno" > 305< / span >   < span class = "keywordflow" > if< / span > (stream_[0] == 0x00 & & IsStartCode(stream_ + 1))< / div >
< div class = "line" > < a name = "l00306" > < / a > < span class = "lineno" > 306< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00307" > < / a > < span class = "lineno" > 307< / span >   }< / div >
< div class = "line" > < a name = "l00308" > < / a > < span class = "lineno" > 308< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00309" > < / a > < span class = "lineno" > 309< / span >   }< / div >
< div class = "line" > < a name = "l00310" > < / a > < span class = "lineno" > 310< / span >   < / div >
< div class = "line" > < a name = "l00311" > < / a > < span class = "lineno" > 311< / span >   < span class = "comment" > // static< / span > < / div >
< div class = "line" > < a name = "l00312" > < / a > < span class = "lineno" > 312< / span >   < span class = "keywordtype" > bool< / span > NaluReader::FindStartCode(< span class = "keyword" > const< / span > uint8_t* data,< / div >
< div class = "line" > < a name = "l00313" > < / a > < span class = "lineno" > 313< / span >   uint64_t data_size,< / div >
< div class = "line" > < a name = "l00314" > < / a > < span class = "lineno" > 314< / span >   uint64_t* offset,< / div >
< div class = "line" > < a name = "l00315" > < / a > < span class = "lineno" > 315< / span >   uint8_t* start_code_size) {< / div >
< div class = "line" > < a name = "l00316" > < / a > < span class = "lineno" > 316< / span >   uint64_t bytes_left = data_size;< / div >
< div class = "line" > < a name = "l00317" > < / a > < span class = "lineno" > 317< / span >   < / div >
< div class = "line" > < a name = "l00318" > < / a > < span class = "lineno" > 318< / span >   < span class = "keywordflow" > while< / span > (bytes_left > = 3) {< / div >
< div class = "line" > < a name = "l00319" > < / a > < span class = "lineno" > 319< / span >   < span class = "keywordflow" > if< / span > (IsStartCode(data)) {< / div >
< div class = "line" > < a name = "l00320" > < / a > < span class = "lineno" > 320< / span >   < span class = "comment" > // Found three-byte start code, set pointer at its beginning.< / span > < / div >
< div class = "line" > < a name = "l00321" > < / a > < span class = "lineno" > 321< / span >   *offset = data_size - bytes_left;< / div >
< div class = "line" > < a name = "l00322" > < / a > < span class = "lineno" > 322< / span >   *start_code_size = 3;< / div >
< div class = "line" > < a name = "l00323" > < / a > < span class = "lineno" > 323< / span >   < / div >
< div class = "line" > < a name = "l00324" > < / a > < span class = "lineno" > 324< / span >   < span class = "comment" > // If there is a zero byte before this start code,< / span > < / div >
< div class = "line" > < a name = "l00325" > < / a > < span class = "lineno" > 325< / span >   < span class = "comment" > // then it' s actually a four-byte start code, so backtrack one byte.< / span > < / div >
< div class = "line" > < a name = "l00326" > < / a > < span class = "lineno" > 326< / span >   < span class = "keywordflow" > if< / span > (*offset > 0 & & *(data - 1) == 0x00) {< / div >
< div class = "line" > < a name = "l00327" > < / a > < span class = "lineno" > 327< / span >   --(*offset);< / div >
< div class = "line" > < a name = "l00328" > < / a > < span class = "lineno" > 328< / span >   ++(*start_code_size);< / div >
< div class = "line" > < a name = "l00329" > < / a > < span class = "lineno" > 329< / span >   }< / div >
< div class = "line" > < a name = "l00330" > < / a > < span class = "lineno" > 330< / span >   < / div >
< div class = "line" > < a name = "l00331" > < / a > < span class = "lineno" > 331< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00332" > < / a > < span class = "lineno" > 332< / span >   }< / div >
< div class = "line" > < a name = "l00333" > < / a > < span class = "lineno" > 333< / span >   < / div >
< div class = "line" > < a name = "l00334" > < / a > < span class = "lineno" > 334< / span >   ++data;< / div >
< div class = "line" > < a name = "l00335" > < / a > < span class = "lineno" > 335< / span >   --bytes_left;< / div >
< div class = "line" > < a name = "l00336" > < / a > < span class = "lineno" > 336< / span >   }< / div >
< div class = "line" > < a name = "l00337" > < / a > < span class = "lineno" > 337< / span >   < / div >
< div class = "line" > < a name = "l00338" > < / a > < span class = "lineno" > 338< / span >   < span class = "comment" > // End of data: offset is pointing to the first byte that was not considered< / span > < / div >
< div class = "line" > < a name = "l00339" > < / a > < span class = "lineno" > 339< / span >   < span class = "comment" > // as a possible start of a start code.< / span > < / div >
< div class = "line" > < a name = "l00340" > < / a > < span class = "lineno" > 340< / span >   *offset = data_size - bytes_left;< / div >
< div class = "line" > < a name = "l00341" > < / a > < span class = "lineno" > 341< / span >   *start_code_size = 0;< / div >
< div class = "line" > < a name = "l00342" > < / a > < span class = "lineno" > 342< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00343" > < / a > < span class = "lineno" > 343< / span >   }< / div >
< div class = "line" > < a name = "l00344" > < / a > < span class = "lineno" > 344< / span >   < / div >
< div class = "line" > < a name = "l00345" > < / a > < span class = "lineno" > 345< / span >   < span class = "comment" > // static< / span > < / div >
< div class = "line" > < a name = "l00346" > < / a > < span class = "lineno" > < a class = "line" href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#aa14b3cd5da5657d8a3d0ecfdf301a184" > 346< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#aa14b3cd5da5657d8a3d0ecfdf301a184" > NaluReader::FindStartCodeInClearRange< / a > (< / div >
< div class = "line" > < a name = "l00347" > < / a > < span class = "lineno" > 347< / span >   < span class = "keyword" > const< / span > uint8_t* data,< / div >
< div class = "line" > < a name = "l00348" > < / a > < span class = "lineno" > 348< / span >   uint64_t data_size,< / div >
< div class = "line" > < a name = "l00349" > < / a > < span class = "lineno" > 349< / span >   uint64_t* offset,< / div >
< div class = "line" > < a name = "l00350" > < / a > < span class = "lineno" > 350< / span >   uint8_t* start_code_size,< / div >
< div class = "line" > < a name = "l00351" > < / a > < span class = "lineno" > 351< / span >   < span class = "keyword" > const< / span > std::vector< SubsampleEntry> & subsamples) {< / div >
< div class = "line" > < a name = "l00352" > < / a > < span class = "lineno" > 352< / span >   < span class = "keywordflow" > if< / span > (subsamples.empty()) {< / div >
< div class = "line" > < a name = "l00353" > < / a > < span class = "lineno" > 353< / span >   < span class = "keywordflow" > return< / span > FindStartCode(data, data_size, offset, start_code_size);< / div >
< div class = "line" > < a name = "l00354" > < / a > < span class = "lineno" > 354< / span >   }< / div >
< div class = "line" > < a name = "l00355" > < / a > < span class = "lineno" > 355< / span >   < / div >
< div class = "line" > < a name = "l00356" > < / a > < span class = "lineno" > 356< / span >   uint64_t current_offset = 0;< / div >
< div class = "line" > < a name = "l00357" > < / a > < span class = "lineno" > 357< / span >   < span class = "keywordflow" > for< / span > (< span class = "keyword" > const< / span > < a class = "code" href = "../../d1/d34/structshaka_1_1media_1_1SubsampleEntry.html" > SubsampleEntry< / a > & subsample : subsamples) {< / div >
< div class = "line" > < a name = "l00358" > < / a > < span class = "lineno" > 358< / span >   uint16_t clear_bytes = subsample.clear_bytes;< / div >
< div class = "line" > < a name = "l00359" > < / a > < span class = "lineno" > 359< / span >   < span class = "keywordflow" > if< / span > (current_offset + clear_bytes > data_size) {< / div >
< div class = "line" > < a name = "l00360" > < / a > < span class = "lineno" > 360< / span >   LOG(WARNING) < < < span class = "stringliteral" > " The sum of subsample sizes is greater than data_size." < / span > ;< / div >
< div class = "line" > < a name = "l00361" > < / a > < span class = "lineno" > 361< / span >   clear_bytes = data_size - current_offset;< / div >
< div class = "line" > < a name = "l00362" > < / a > < span class = "lineno" > 362< / span >   }< / div >
< div class = "line" > < a name = "l00363" > < / a > < span class = "lineno" > 363< / span >   < / div >
< div class = "line" > < a name = "l00364" > < / a > < span class = "lineno" > 364< / span >   < span class = "comment" > // Note that calling FindStartCode() here should get the correct< / span > < / div >
< div class = "line" > < a name = "l00365" > < / a > < span class = "lineno" > 365< / span >   < span class = "comment" > // start_code_size, even tho data + current_offset may be in the middle of< / span > < / div >
< div class = "line" > < a name = "l00366" > < / a > < span class = "lineno" > 366< / span >   < span class = "comment" > // the buffer because data + current_offset - 1 is either it shouldn' t be< / span > < / div >
< div class = "line" > < a name = "l00367" > < / a > < span class = "lineno" > 367< / span >   < span class = "comment" > // accessed because it' s data - 1 or it is encrypted.< / span > < / div >
< div class = "line" > < a name = "l00368" > < / a > < span class = "lineno" > 368< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > bool< / span > found_start_code = FindStartCode(< / div >
< div class = "line" > < a name = "l00369" > < / a > < span class = "lineno" > 369< / span >   data + current_offset, clear_bytes, offset, start_code_size);< / div >
< div class = "line" > < a name = "l00370" > < / a > < span class = "lineno" > 370< / span >   < span class = "keywordflow" > if< / span > (found_start_code) {< / div >
< div class = "line" > < a name = "l00371" > < / a > < span class = "lineno" > 371< / span >   *offset += current_offset;< / div >
< div class = "line" > < a name = "l00372" > < / a > < span class = "lineno" > 372< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00373" > < / a > < span class = "lineno" > 373< / span >   }< / div >
< div class = "line" > < a name = "l00374" > < / a > < span class = "lineno" > 374< / span >   < span class = "keyword" > const< / span > uint64_t subsample_size =< / div >
< div class = "line" > < a name = "l00375" > < / a > < span class = "lineno" > 375< / span >   subsample.clear_bytes + subsample.cipher_bytes;< / div >
< div class = "line" > < a name = "l00376" > < / a > < span class = "lineno" > 376< / span >   current_offset += subsample_size;< / div >
< div class = "line" > < a name = "l00377" > < / a > < span class = "lineno" > 377< / span >   < span class = "keywordflow" > if< / span > (current_offset > data_size) {< / div >
< div class = "line" > < a name = "l00378" > < / a > < span class = "lineno" > 378< / span >   < span class = "comment" > // Assign data_size here so that the returned offset points to the end of< / span > < / div >
< div class = "line" > < a name = "l00379" > < / a > < span class = "lineno" > 379< / span >   < span class = "comment" > // the data.< / span > < / div >
< div class = "line" > < a name = "l00380" > < / a > < span class = "lineno" > 380< / span >   current_offset = data_size;< / div >
< div class = "line" > < a name = "l00381" > < / a > < span class = "lineno" > 381< / span >   LOG(WARNING) < < < span class = "stringliteral" > " The sum of subsamples is greater than data_size." < / span > ;< / div >
< div class = "line" > < a name = "l00382" > < / a > < span class = "lineno" > 382< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00383" > < / a > < span class = "lineno" > 383< / span >   }< / div >
< div class = "line" > < a name = "l00384" > < / a > < span class = "lineno" > 384< / span >   }< / div >
< div class = "line" > < a name = "l00385" > < / a > < span class = "lineno" > 385< / span >   < / div >
< div class = "line" > < a name = "l00386" > < / a > < span class = "lineno" > 386< / span >   < span class = "comment" > // If there is more that' s not specified by the subsample entries, assume it< / span > < / div >
< div class = "line" > < a name = "l00387" > < / a > < span class = "lineno" > 387< / span >   < span class = "comment" > // is in the clear.< / span > < / div >
< div class = "line" > < a name = "l00388" > < / a > < span class = "lineno" > 388< / span >   < span class = "keywordflow" > if< / span > (current_offset < data_size) {< / div >
< div class = "line" > < a name = "l00389" > < / a > < span class = "lineno" > 389< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > bool< / span > found_start_code =< / div >
< div class = "line" > < a name = "l00390" > < / a > < span class = "lineno" > 390< / span >   FindStartCode(data + current_offset, data_size - current_offset, offset,< / div >
< div class = "line" > < a name = "l00391" > < / a > < span class = "lineno" > 391< / span >   start_code_size);< / div >
< div class = "line" > < a name = "l00392" > < / a > < span class = "lineno" > 392< / span >   *offset += current_offset;< / div >
< div class = "line" > < a name = "l00393" > < / a > < span class = "lineno" > 393< / span >   < span class = "keywordflow" > return< / span > found_start_code;< / div >
< div class = "line" > < a name = "l00394" > < / a > < span class = "lineno" > 394< / span >   }< / div >
< div class = "line" > < a name = "l00395" > < / a > < span class = "lineno" > 395< / span >   < / div >
< div class = "line" > < a name = "l00396" > < / a > < span class = "lineno" > 396< / span >   < span class = "comment" > // End of data: offset is pointing to the first byte that was not considered< / span > < / div >
< div class = "line" > < a name = "l00397" > < / a > < span class = "lineno" > 397< / span >   < span class = "comment" > // as a possible start of a start code.< / span > < / div >
< div class = "line" > < a name = "l00398" > < / a > < span class = "lineno" > 398< / span >   *offset = current_offset;< / div >
< div class = "line" > < a name = "l00399" > < / a > < span class = "lineno" > 399< / span >   *start_code_size = 0;< / div >
< div class = "line" > < a name = "l00400" > < / a > < span class = "lineno" > 400< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00401" > < / a > < span class = "lineno" > 401< / span >   }< / div >
< div class = "line" > < a name = "l00402" > < / a > < span class = "lineno" > 402< / span >   < / div >
< div class = "line" > < a name = "l00403" > < / a > < span class = "lineno" > 403< / span >   < span class = "keywordtype" > bool< / span > NaluReader::LocateNaluByStartCode(uint64_t* nalu_size,< / div >
< div class = "line" > < a name = "l00404" > < / a > < span class = "lineno" > 404< / span >   uint8_t* start_code_size) {< / div >
< div class = "line" > < a name = "l00405" > < / a > < span class = "lineno" > 405< / span >   < span class = "comment" > // Find the start code of next NALU.< / span > < / div >
< div class = "line" > < a name = "l00406" > < / a > < span class = "lineno" > 406< / span >   uint64_t nalu_start_off = 0;< / div >
< div class = "line" > < a name = "l00407" > < / a > < span class = "lineno" > 407< / span >   uint8_t annexb_start_code_size = 0;< / div >
< div class = "line" > < a name = "l00408" > < / a > < span class = "lineno" > 408< / span >   < span class = "keywordflow" > if< / span > (!< a class = "code" href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#aa14b3cd5da5657d8a3d0ecfdf301a184" > FindStartCodeInClearRange< / a > (< / div >
< div class = "line" > < a name = "l00409" > < / a > < span class = "lineno" > 409< / span >   stream_, stream_size_,< / div >
< div class = "line" > < a name = "l00410" > < / a > < span class = "lineno" > 410< / span >   & nalu_start_off, & annexb_start_code_size, subsamples_)) {< / div >
< div class = "line" > < a name = "l00411" > < / a > < span class = "lineno" > 411< / span >   DVLOG(4) < < < span class = "stringliteral" > " Could not find start code, end of stream?" < / span > ;< / div >
< div class = "line" > < a name = "l00412" > < / a > < span class = "lineno" > 412< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00413" > < / a > < span class = "lineno" > 413< / span >   }< / div >
< div class = "line" > < a name = "l00414" > < / a > < span class = "lineno" > 414< / span >   < / div >
< div class = "line" > < a name = "l00415" > < / a > < span class = "lineno" > 415< / span >   < span class = "comment" > // Move the stream to the beginning of the NALU (pointing at the start code).< / span > < / div >
< div class = "line" > < a name = "l00416" > < / a > < span class = "lineno" > 416< / span >   stream_ += nalu_start_off;< / div >
< div class = "line" > < a name = "l00417" > < / a > < span class = "lineno" > 417< / span >   stream_size_ -= nalu_start_off;< / div >
< div class = "line" > < a name = "l00418" > < / a > < span class = "lineno" > 418< / span >   < span class = "comment" > // Shift the subsamples so that next call to FindStartCode() takes the updated< / span > < / div >
< div class = "line" > < a name = "l00419" > < / a > < span class = "lineno" > 419< / span >   < span class = "comment" > // subsample info.< / span > < / div >
< div class = "line" > < a name = "l00420" > < / a > < span class = "lineno" > 420< / span >   UpdateSubsamples(nalu_start_off, & subsamples_);< / div >
< div class = "line" > < a name = "l00421" > < / a > < span class = "lineno" > 421< / span >   < / div >
< div class = "line" > < a name = "l00422" > < / a > < span class = "lineno" > 422< / span >   < span class = "keyword" > const< / span > uint8_t* nalu_data = stream_ + annexb_start_code_size;< / div >
< div class = "line" > < a name = "l00423" > < / a > < span class = "lineno" > 423< / span >   < span class = "comment" > // This is a temporary subsample entries for finding next nalu. subsamples_< / span > < / div >
< div class = "line" > < a name = "l00424" > < / a > < span class = "lineno" > 424< / span >   < span class = "comment" > // should not be updated below.< / span > < / div >
< div class = "line" > < a name = "l00425" > < / a > < span class = "lineno" > 425< / span >   std::vector< SubsampleEntry> subsamples_for_finding_next_nalu;< / div >
< div class = "line" > < a name = "l00426" > < / a > < span class = "lineno" > 426< / span >   < span class = "keywordflow" > if< / span > (!subsamples_.empty()) {< / div >
< div class = "line" > < a name = "l00427" > < / a > < span class = "lineno" > 427< / span >   subsamples_for_finding_next_nalu = subsamples_;< / div >
< div class = "line" > < a name = "l00428" > < / a > < span class = "lineno" > 428< / span >   UpdateSubsamples(annexb_start_code_size, & subsamples_for_finding_next_nalu);< / div >
< div class = "line" > < a name = "l00429" > < / a > < span class = "lineno" > 429< / span >   }< / div >
< div class = "line" > < a name = "l00430" > < / a > < span class = "lineno" > 430< / span >   uint64_t max_nalu_data_size = stream_size_ - annexb_start_code_size;< / div >
< div class = "line" > < a name = "l00431" > < / a > < span class = "lineno" > 431< / span >   < span class = "keywordflow" > if< / span > (max_nalu_data_size < = 0) {< / div >
< div class = "line" > < a name = "l00432" > < / a > < span class = "lineno" > 432< / span >   DVLOG(3) < < < span class = "stringliteral" > " End of stream" < / span > ;< / div >
< div class = "line" > < a name = "l00433" > < / a > < span class = "lineno" > 433< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00434" > < / a > < span class = "lineno" > 434< / span >   }< / div >
< div class = "line" > < a name = "l00435" > < / a > < span class = "lineno" > 435< / span >   < / div >
< div class = "line" > < a name = "l00436" > < / a > < span class = "lineno" > 436< / span >   < span class = "comment" > // Find the start code of next NALU;< / span > < / div >
< div class = "line" > < a name = "l00437" > < / a > < span class = "lineno" > 437< / span >   < span class = "comment" > // if successful, |nalu_size_without_start_code| is the number of bytes from< / span > < / div >
< div class = "line" > < a name = "l00438" > < / a > < span class = "lineno" > 438< / span >   < span class = "comment" > // after previous start code to before this one;< / span > < / div >
< div class = "line" > < a name = "l00439" > < / a > < span class = "lineno" > 439< / span >   < span class = "comment" > // if next start code is not found, it is still a valid NALU since there< / span > < / div >
< div class = "line" > < a name = "l00440" > < / a > < span class = "lineno" > 440< / span >   < span class = "comment" > // are some bytes left after the first start code: all the remaining bytes< / span > < / div >
< div class = "line" > < a name = "l00441" > < / a > < span class = "lineno" > 441< / span >   < span class = "comment" > // belong to the current NALU.< / span > < / div >
< div class = "line" > < a name = "l00442" > < / a > < span class = "lineno" > 442< / span >   uint64_t nalu_size_without_start_code = 0;< / div >
< div class = "line" > < a name = "l00443" > < / a > < span class = "lineno" > 443< / span >   uint8_t next_start_code_size = 0;< / div >
< div class = "line" > < a name = "l00444" > < / a > < span class = "lineno" > 444< / span >   < span class = "keywordflow" > while< / span > (< span class = "keyword" > true< / span > ) {< / div >
< div class = "line" > < a name = "l00445" > < / a > < span class = "lineno" > 445< / span >   < span class = "keywordflow" > if< / span > (!< a class = "code" href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#aa14b3cd5da5657d8a3d0ecfdf301a184" > FindStartCodeInClearRange< / a > (< / div >
< div class = "line" > < a name = "l00446" > < / a > < span class = "lineno" > 446< / span >   nalu_data, max_nalu_data_size,< / div >
< div class = "line" > < a name = "l00447" > < / a > < span class = "lineno" > 447< / span >   & nalu_size_without_start_code, & next_start_code_size,< / div >
< div class = "line" > < a name = "l00448" > < / a > < span class = "lineno" > 448< / span >   subsamples_for_finding_next_nalu)) {< / div >
< div class = "line" > < a name = "l00449" > < / a > < span class = "lineno" > 449< / span >   nalu_data += max_nalu_data_size;< / div >
< div class = "line" > < a name = "l00450" > < / a > < span class = "lineno" > 450< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00451" > < / a > < span class = "lineno" > 451< / span >   }< / div >
< div class = "line" > < a name = "l00452" > < / a > < span class = "lineno" > 452< / span >   < / div >
< div class = "line" > < a name = "l00453" > < / a > < span class = "lineno" > 453< / span >   nalu_data += nalu_size_without_start_code + next_start_code_size;< / div >
< div class = "line" > < a name = "l00454" > < / a > < span class = "lineno" > 454< / span >   max_nalu_data_size -= nalu_size_without_start_code + next_start_code_size;< / div >
< div class = "line" > < a name = "l00455" > < / a > < span class = "lineno" > 455< / span >   UpdateSubsamples(nalu_size_without_start_code + next_start_code_size,< / div >
< div class = "line" > < a name = "l00456" > < / a > < span class = "lineno" > 456< / span >   & subsamples_for_finding_next_nalu);< / div >
< div class = "line" > < a name = "l00457" > < / a > < span class = "lineno" > 457< / span >   < span class = "comment" > // If it is not a valid NAL unit, we will continue searching. This is to< / span > < / div >
< div class = "line" > < a name = "l00458" > < / a > < span class = "lineno" > 458< / span >   < span class = "comment" > // handle the case where emulation prevention are not applied.< / span > < / div >
< div class = "line" > < a name = "l00459" > < / a > < span class = "lineno" > 459< / span >   Nalu nalu;< / div >
< div class = "line" > < a name = "l00460" > < / a > < span class = "lineno" > 460< / span >   < span class = "keywordflow" > if< / span > (nalu.Initialize(nalu_type_, nalu_data, max_nalu_data_size)) {< / div >
< div class = "line" > < a name = "l00461" > < / a > < span class = "lineno" > 461< / span >   nalu_data -= next_start_code_size;< / div >
< div class = "line" > < a name = "l00462" > < / a > < span class = "lineno" > 462< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00463" > < / a > < span class = "lineno" > 463< / span >   }< / div >
< div class = "line" > < a name = "l00464" > < / a > < span class = "lineno" > 464< / span >   LOG(WARNING) < < < span class = "stringliteral" > " Seeing invalid NAL unit. Emulation prevention may not " < / span > < / div >
< div class = "line" > < a name = "l00465" > < / a > < span class = "lineno" > 465< / span >   < span class = "stringliteral" > " have been applied properly. Assuming it is part of the " < / span > < / div >
< div class = "line" > < a name = "l00466" > < / a > < span class = "lineno" > 466< / span >   < span class = "stringliteral" > " previous NAL unit." < / span > ;< / div >
< div class = "line" > < a name = "l00467" > < / a > < span class = "lineno" > 467< / span >   }< / div >
< div class = "line" > < a name = "l00468" > < / a > < span class = "lineno" > 468< / span >   *nalu_size = nalu_data - stream_;< / div >
< div class = "line" > < a name = "l00469" > < / a > < span class = "lineno" > 469< / span >   *start_code_size = annexb_start_code_size;< / div >
< div class = "line" > < a name = "l00470" > < / a > < span class = "lineno" > 470< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00471" > < / a > < span class = "lineno" > 471< / span >   }< / div >
< div class = "line" > < a name = "l00472" > < / a > < span class = "lineno" > 472< / span >   < / div >
< div class = "line" > < a name = "l00473" > < / a > < span class = "lineno" > 473< / span >   } < span class = "comment" > // namespace media< / span > < / div >
< div class = "line" > < a name = "l00474" > < / a > < span class = "lineno" > 474< / span >   } < span class = "comment" > // namespace shaka< / span > < / div >
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< / div > <!-- fragment --> < / div > <!-- contents -->
< div class = "ttc" id = "aclassshaka_1_1media_1_1Nalu_html" > < div class = "ttname" > < a href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html" > shaka::media::Nalu< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/d87/nalu__reader_8h_source.html#l00027" > nalu_reader.h:27< / a > < / div > < / div >
< div class = "ttc" id = "astructshaka_1_1media_1_1SubsampleEntry_html" > < div class = "ttname" > < a href = "../../d1/d34/structshaka_1_1media_1_1SubsampleEntry.html" > shaka::media::SubsampleEntry< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../df/dad/decrypt__config_8h_source.html#l00028" > decrypt_config.h:28< / a > < / div > < / div >
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< div class = "ttc" id = "aclassshaka_1_1media_1_1NaluReader_html_a2d1611fe3e60fc6570fe0c21e13911b0" > < div class = "ttname" > < a href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#a2d1611fe3e60fc6570fe0c21e13911b0" > shaka::media::NaluReader::NaluReader< / a > < / div > < div class = "ttdeci" > NaluReader(Nalu::CodecType type, uint8_t nal_length_size, const uint8_t *stream, uint64_t stream_size)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d1/df5/nalu__reader_8cc_source.html#l00214" > nalu_reader.cc:214< / a > < / div > < / div >
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< div class = "ttc" id = "anamespaceshaka_html" > < div class = "ttname" > < a href = "../../d8/daf/namespaceshaka.html" > shaka< / a > < / div > < div class = "ttdoc" > All the methods that are virtual are virtual for mocking.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/d15/gflags__hex__bytes_8cc_source.html#l00011" > gflags_hex_bytes.cc:11< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1Nalu_html_abe782e4298e7add8ce0a1c33e66cfcdb" > < div class = "ttname" > < a href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#abe782e4298e7add8ce0a1c33e66cfcdb" > shaka::media::Nalu::payload_size< / a > < / div > < div class = "ttdeci" > uint64_t payload_size() const< / div > < div class = "ttdoc" > Size of this Nalu minus header_size().< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/d87/nalu__reader_8h_source.html#l00102" > nalu_reader.h:102< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1NaluReader_html_ae051f1f92d84acfcd4cc159d972d647a" > < div class = "ttname" > < a href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#ae051f1f92d84acfcd4cc159d972d647a" > shaka::media::NaluReader::Advance< / a > < / div > < div class = "ttdeci" > Result Advance(Nalu *nalu)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d1/df5/nalu__reader_8cc_source.html#l00241" > nalu_reader.cc:241< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1BufferReader_html_ac98c6631c07300a6b78ec58bfd4ced30" > < div class = "ttname" > < a href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html#ac98c6631c07300a6b78ec58bfd4ced30" > shaka::media::BufferReader::ReadNBytesInto8< / a > < / div > < div class = "ttdeci" > bool ReadNBytesInto8(uint64_t *v, size_t num_bytes) WARN_UNUSED_RESULT< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/dbc/buffer__reader_8cc_source.html#l00040" > buffer_reader.cc:40< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1Nalu_html_a7a3b4358f56619fc63fe74525f4eb92b" > < div class = "ttname" > < a href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a7a3b4358f56619fc63fe74525f4eb92b" > shaka::media::Nalu::type< / a > < / div > < div class = "ttdeci" > int type() const< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/d87/nalu__reader_8h_source.html#l00113" > nalu_reader.h:113< / a > < / div > < / div >
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< div class = "ttc" id = "aclassshaka_1_1media_1_1NaluReader_html_a9ed9d56a06f43717cdb7035f86075975" > < div class = "ttname" > < a href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#a9ed9d56a06f43717cdb7035f86075975" > shaka::media::NaluReader::StartsWithStartCode< / a > < / div > < div class = "ttdeci" > bool StartsWithStartCode()< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d1/df5/nalu__reader_8cc_source.html#l00299" > nalu_reader.cc:299< / a > < / div > < / div >
2021-06-22 00:16:40 +00:00
< div class = "ttc" id = "aclassshaka_1_1media_1_1BufferReader_html" > < div class = "ttname" > < a href = "../../d9/d13/classshaka_1_1media_1_1BufferReader.html" > shaka::media::BufferReader< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../de/d3e/buffer__reader_8h_source.html#l00023" > buffer_reader.h:23< / a > < / div > < / div >
2021-04-10 04:00:37 +00:00
< div class = "ttc" id = "aclassshaka_1_1media_1_1NaluReader_html_aa14b3cd5da5657d8a3d0ecfdf301a184" > < div class = "ttname" > < a href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html#aa14b3cd5da5657d8a3d0ecfdf301a184" > shaka::media::NaluReader::FindStartCodeInClearRange< / a > < / div > < div class = "ttdeci" > static bool FindStartCodeInClearRange(const uint8_t *data, uint64_t data_size, uint64_t *offset, uint8_t *start_code_size, const std::vector< SubsampleEntry > & subsamples)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d1/df5/nalu__reader_8cc_source.html#l00346" > nalu_reader.cc:346< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1Nalu_html_a52dc6f445a09c36a64c634ccc2891489" > < div class = "ttname" > < a href = "../../d6/dff/classshaka_1_1media_1_1Nalu.html#a52dc6f445a09c36a64c634ccc2891489" > shaka::media::Nalu::data< / a > < / div > < div class = "ttdeci" > const uint8_t * data() const< / div > < div class = "ttdoc" > This is the pointer to the Nalu data, pointing to the header.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/d87/nalu__reader_8h_source.html#l00097" > nalu_reader.h:97< / a > < / div > < / div >
2021-06-22 00:16:40 +00:00
< div class = "ttc" id = "aclassshaka_1_1media_1_1NaluReader_html" > < div class = "ttname" > < a href = "../../db/d86/classshaka_1_1media_1_1NaluReader.html" > shaka::media::NaluReader< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/d87/nalu__reader_8h_source.html#l00149" > nalu_reader.h:149< / a > < / div > < / div >
2016-02-17 01:09:50 +00:00
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2016-02-17 01:09:50 +00:00
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