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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_aa847bee70cdde822696c7e33a504139.html" > crypto< / 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 2018 Google LLC. 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/crypto/subsample_generator.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 < algorithm> < / span > < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < span class = "preprocessor" > #include < limits> < / span > < / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < span class = "preprocessor" > #include " packager/media/base/decrypt_config.h" < / span > < / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < span class = "preprocessor" > #include " packager/media/base/video_stream_info.h" < / span > < / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < span class = "preprocessor" > #include " packager/media/codecs/av1_parser.h" < / span > < / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < span class = "preprocessor" > #include " packager/media/codecs/video_slice_header_parser.h" < / span > < / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < span class = "preprocessor" > #include " packager/media/codecs/vp8_parser.h" < / span > < / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < span class = "preprocessor" > #include " packager/media/codecs/vp9_parser.h" < / span > < / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < span class = "keyword" > namespace < / span > < a class = "code" href = "../../d8/daf/namespaceshaka.html" > shaka< / a > {< / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < span class = "keyword" > namespace < / span > media {< / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < span class = "keyword" > namespace < / 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 = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > kAesBlockSize = 16u;< / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   < / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   uint8_t GetNaluLengthSize(< span class = "keyword" > const< / span > StreamInfo& stream_info) {< / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   < span class = "keywordflow" > if< / span > (stream_info.stream_type() != kStreamVideo)< / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < span class = "keywordflow" > return< / span > 0;< / 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 = "keyword" > const< / span > VideoStreamInfo& video_stream_info =< / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   < span class = "keyword" > static_cast< < / span > < span class = "keyword" > const < / span > VideoStreamInfo& < span class = "keyword" > > < / span > (stream_info);< / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   < span class = "keywordflow" > return< / span > video_stream_info.nalu_length_size();< / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   }< / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   < / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   < span class = "keywordtype" > bool< / span > ShouldAlignProtectedData(Codec codec,< / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   FourCC protection_scheme,< / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   < span class = "keywordtype" > bool< / span > vp9_subsample_encryption) {< / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   < span class = "keywordflow" > switch< / span > (codec) {< / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   < span class = "keywordflow" > case< / span > kCodecVP9:< / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   < span class = "comment" > // " VP Codec ISO Media File Format Binding" document requires that the< / span > < / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   < span class = "comment" > // encrypted bytes of each frame within the superframe must be block< / span > < / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   < span class = "comment" > // aligned so that the counter state can be computed for each frame< / span > < / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   < span class = "comment" > // within the superframe.< / span > < / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   < span class = "comment" > // ISO/IEC 23001-7:2016 10.2 ' cbc1' 10.3 ' cens' < / span > < / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   < span class = "comment" > // The BytesOfProtectedData size SHALL be a multiple of 16 bytes to< / span > < / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   < span class = "comment" > // avoid partial blocks in Subsamples.< / span > < / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   < span class = "comment" > // For consistency, apply block alignment to all frames when VP9 subsample< / span > < / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   < span class = "comment" > // encryption is enabled.< / span > < / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   < span class = "keywordflow" > return< / span > vp9_subsample_encryption;< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   < span class = "comment" > // ISO/IEC 23001-7:2016 10.2 ' cbc1' 10.3 ' cens' < / span > < / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   < span class = "comment" > // The BytesOfProtectedData size SHALL be a multiple of 16 bytes to avoid< / span > < / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   < span class = "comment" > // partial blocks in Subsamples.< / span > < / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < span class = "comment" > // CMAF requires ' cenc' scheme BytesOfProtectedData SHALL be a multiple of< / span > < / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   < span class = "comment" > // 16 bytes; while ' cbcs' scheme BytesOfProtectedData SHALL start on the< / span > < / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   < span class = "comment" > // first byte of video data following the slice header.< / span > < / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   < span class = "comment" > // https://aomediacodec.github.io/av1-isobmff/#subsample-encryption AV1< / span > < / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   < span class = "comment" > // has a similar clause.< / span > < / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   < span class = "keywordflow" > return< / span > protection_scheme == FOURCC_cbc1 ||< / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   protection_scheme == FOURCC_cens ||< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   protection_scheme == FOURCC_cenc;< / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / 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 >   < / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   < span class = "comment" > // A convenient util class to organize subsamples, e.g. combine consecutive< / span > < / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   < span class = "comment" > // subsamples with only clear bytes, split subsamples if the clear bytes exceeds< / span > < / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   < span class = "comment" > // 2^16 etc.< / span > < / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   < span class = "keyword" > class < / span > SubsampleOrganizer {< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   < span class = "keyword" > public< / span > :< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   SubsampleOrganizer(< span class = "keywordtype" > bool< / span > align_protected_data,< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   std::vector< SubsampleEntry> * subsamples)< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   : align_protected_data_(align_protected_data), subsamples_(subsamples) {}< / 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 >   ~SubsampleOrganizer() {< / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < span class = "keywordflow" > if< / span > (accumulated_clear_bytes_ > 0) {< / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   PushSubsample(accumulated_clear_bytes_, 0);< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   accumulated_clear_bytes_ = 0;< / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   }< / div >
< 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 >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   < span class = "keywordtype" > void< / span > AddSubsample(< span class = "keywordtype" > size_t< / span > clear_bytes, < span class = "keywordtype" > size_t< / span > cipher_bytes) {< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   DCHECK_LT(clear_bytes, std::numeric_limits< uint32_t> ::max());< / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   DCHECK_LT(cipher_bytes, std::numeric_limits< uint32_t> ::max());< / 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 >   < span class = "keywordflow" > if< / span > (align_protected_data_ & & cipher_bytes != 0) {< / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > misalign_bytes = cipher_bytes % kAesBlockSize;< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   clear_bytes += misalign_bytes;< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   cipher_bytes -= misalign_bytes;< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   }< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   < / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   accumulated_clear_bytes_ += clear_bytes;< / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   < span class = "comment" > // Accumulated clear bytes are handled later.< / span > < / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   < span class = "keywordflow" > if< / span > (cipher_bytes == 0)< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   < span class = "keywordflow" > return< / 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 >   PushSubsample(accumulated_clear_bytes_, cipher_bytes);< / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   accumulated_clear_bytes_ = 0;< / 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 >   < / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   < span class = "keyword" > private< / span > :< / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   SubsampleOrganizer(< span class = "keyword" > const< / span > SubsampleOrganizer& ) = < span class = "keyword" > delete< / span > ;< / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   SubsampleOrganizer& operator=(< span class = "keyword" > const< / span > SubsampleOrganizer& ) = < span class = "keyword" > delete< / span > ;< / div >
< div class = "line" > < a name = "l00102" > < / a > < span class = "lineno" > 102< / span >   < / div >
< div class = "line" > < a name = "l00103" > < / a > < span class = "lineno" > 103< / span >   < span class = "keywordtype" > void< / span > PushSubsample(< span class = "keywordtype" > size_t< / span > clear_bytes, < span class = "keywordtype" > size_t< / span > cipher_bytes) {< / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   < span class = "keyword" > const< / span > uint16_t kUInt16Max = std::numeric_limits< uint16_t> ::max();< / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   < span class = "keywordflow" > while< / span > (clear_bytes > kUInt16Max) {< / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   subsamples_-> emplace_back(kUInt16Max, 0);< / div >
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   clear_bytes -= kUInt16Max;< / div >
< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > 108< / span >   }< / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   subsamples_-> emplace_back(< span class = "keyword" > static_cast< < / span > uint16_t< span class = "keyword" > > < / span > (clear_bytes),< / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   < span class = "keyword" > static_cast< < / span > uint32_t< span class = "keyword" > > < / span > (cipher_bytes));< / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   }< / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   < / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > bool< / span > align_protected_data_ = < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   std::vector< SubsampleEntry> * < span class = "keyword" > const< / span > subsamples_ = < span class = "keyword" > nullptr< / span > ;< / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   < span class = "keywordtype" > size_t< / span > accumulated_clear_bytes_ = 0;< / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   };< / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   < / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   } < span class = "comment" > // namespace< / 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" > < a class = "line" href = "../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#a1674b4a68974db06ad4efa9a9b699a46" > 120< / a > < / span >   < a class = "code" href = "../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#a1674b4a68974db06ad4efa9a9b699a46" > SubsampleGenerator::SubsampleGenerator< / a > (< span class = "keywordtype" > bool< / span > vp9_subsample_encryption)< / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   : vp9_subsample_encryption_(vp9_subsample_encryption) {}< / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   < / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   SubsampleGenerator::~SubsampleGenerator() {}< / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   < / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > < a class = "line" href = "../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#ac4478f9099344a05be5b9b3e4e209817" > 125< / a > < / span >   < a class = "code" href = "../../d2/d20/classshaka_1_1Status.html" > Status< / a > < a class = "code" href = "../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#ac4478f9099344a05be5b9b3e4e209817" > SubsampleGenerator::Initialize< / a > (FourCC protection_scheme,< / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   < span class = "keyword" > const< / span > < a class = "code" href = "../../d5/db1/classshaka_1_1media_1_1StreamInfo.html" > StreamInfo< / a > & stream_info) {< / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   codec_ = stream_info.codec();< / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > 128< / span >   nalu_length_size_ = GetNaluLengthSize(stream_info);< / 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 >   < span class = "keywordflow" > switch< / span > (codec_) {< / div >
< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > 131< / span >   < span class = "keywordflow" > case< / span > kCodecAV1:< / div >
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   av1_parser_.reset(< span class = "keyword" > new< / span > < a class = "code" href = "../../db/dc7/classshaka_1_1media_1_1AV1Parser.html" > AV1Parser< / a > );< / div >
< div class = "line" > < a name = "l00133" > < / a > < span class = "lineno" > 133< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00134" > < / a > < span class = "lineno" > 134< / span >   < span class = "keywordflow" > case< / span > kCodecVP9:< / div >
< div class = "line" > < a name = "l00135" > < / a > < span class = "lineno" > 135< / span >   < span class = "keywordflow" > if< / span > (vp9_subsample_encryption_)< / div >
< div class = "line" > < a name = "l00136" > < / a > < span class = "lineno" > 136< / span >   vpx_parser_.reset(< span class = "keyword" > new< / span > < a class = "code" href = "../../db/d5a/classshaka_1_1media_1_1VP9Parser.html" > VP9Parser< / a > );< / div >
< div class = "line" > < a name = "l00137" > < / a > < span class = "lineno" > 137< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00138" > < / a > < span class = "lineno" > 138< / span >   < span class = "keywordflow" > case< / span > kCodecH264:< / div >
< div class = "line" > < a name = "l00139" > < / a > < span class = "lineno" > 139< / span >   header_parser_.reset(< span class = "keyword" > new< / span > < a class = "code" href = "../../da/df0/classshaka_1_1media_1_1H264VideoSliceHeaderParser.html" > H264VideoSliceHeaderParser< / a > );< / div >
< div class = "line" > < a name = "l00140" > < / a > < span class = "lineno" > 140< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00141" > < / a > < span class = "lineno" > 141< / span >   < span class = "keywordflow" > case< / span > kCodecH265:< / div >
< div class = "line" > < a name = "l00142" > < / a > < span class = "lineno" > 142< / span >   < span class = "keywordflow" > case< / span > kCodecH265DolbyVision:< / div >
< div class = "line" > < a name = "l00143" > < / a > < span class = "lineno" > 143< / span >   header_parser_.reset(< span class = "keyword" > new< / span > < a class = "code" href = "../../d1/d79/classshaka_1_1media_1_1H265VideoSliceHeaderParser.html" > H265VideoSliceHeaderParser< / a > );< / div >
< div class = "line" > < a name = "l00144" > < / a > < span class = "lineno" > 144< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00145" > < / a > < span class = "lineno" > 145< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00146" > < / a > < span class = "lineno" > 146< / span >   < span class = "comment" > // Other codecs should have nalu length size == 0.< / span > < / div >
< div class = "line" > < a name = "l00147" > < / a > < span class = "lineno" > 147< / span >   < span class = "keywordflow" > if< / span > (nalu_length_size_ > 0) {< / div >
< div class = "line" > < a name = "l00148" > < / a > < span class = "lineno" > 148< / span >   LOG(WARNING) < < < span class = "stringliteral" > " Unknown video codec ' " < / span > < < codec_ < < < span class = "stringliteral" > " ' " < / span > ;< / div >
< div class = "line" > < a name = "l00149" > < / a > < span class = "lineno" > 149< / span >   < span class = "keywordflow" > return< / span > < a class = "code" href = "../../d2/d20/classshaka_1_1Status.html" > Status< / a > (error::ENCRYPTION_FAILURE, < span class = "stringliteral" > " Unknown video codec." < / span > );< / div >
< div class = "line" > < a name = "l00150" > < / a > < span class = "lineno" > 150< / 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 >   < span class = "keywordflow" > if< / span > (av1_parser_) {< / div >
< div class = "line" > < a name = "l00153" > < / a > < span class = "lineno" > 153< / span >   < span class = "comment" > // Parse configOBUs in AV1CodecConfigurationRecord if exists.< / span > < / div >
< div class = "line" > < a name = "l00154" > < / a > < span class = "lineno" > 154< / span >   < span class = "comment" > // https://aomediacodec.github.io/av1-isobmff/#av1codecconfigurationbox-syntax.< / span > < / div >
< div class = "line" > < a name = "l00155" > < / a > < span class = "lineno" > 155< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > kConfigOBUsOffset = 4;< / div >
< div class = "line" > < a name = "l00156" > < / a > < span class = "lineno" > 156< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > bool< / span > has_config_obus =< / div >
< div class = "line" > < a name = "l00157" > < / a > < span class = "lineno" > 157< / span >   stream_info.codec_config().size() > kConfigOBUsOffset;< / div >
< div class = "line" > < a name = "l00158" > < / a > < span class = "lineno" > 158< / span >   std::vector< AV1Parser::Tile> tiles;< / div >
< div class = "line" > < a name = "l00159" > < / a > < span class = "lineno" > 159< / span >   < span class = "keywordflow" > if< / span > (has_config_obus & & < / div >
< div class = "line" > < a name = "l00160" > < / a > < span class = "lineno" > 160< / span >   !av1_parser_-> Parse(< / div >
< div class = "line" > < a name = "l00161" > < / a > < span class = "lineno" > 161< / span >   & stream_info.codec_config()[kConfigOBUsOffset],< / div >
< div class = "line" > < a name = "l00162" > < / a > < span class = "lineno" > 162< / span >   stream_info.codec_config().size() - kConfigOBUsOffset, & tiles)) {< / div >
< div class = "line" > < a name = "l00163" > < / a > < span class = "lineno" > 163< / span >   < span class = "keywordflow" > return< / span > < a class = "code" href = "../../d2/d20/classshaka_1_1Status.html" > Status< / a > (< / div >
< div class = "line" > < a name = "l00164" > < / a > < span class = "lineno" > 164< / span >   error::ENCRYPTION_FAILURE,< / div >
< div class = "line" > < a name = "l00165" > < / a > < span class = "lineno" > 165< / span >   < span class = "stringliteral" > " Failed to parse configOBUs in AV1CodecConfigurationRecord." < / span > );< / 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 >   DCHECK(tiles.empty());< / div >
< div class = "line" > < a name = "l00168" > < / a > < span class = "lineno" > 168< / span >   }< / div >
< div class = "line" > < a name = "l00169" > < / a > < span class = "lineno" > 169< / span >   < span class = "keywordflow" > if< / span > (header_parser_) {< / div >
< div class = "line" > < a name = "l00170" > < / a > < span class = "lineno" > 170< / span >   CHECK_NE(nalu_length_size_, 0u) < < < span class = "stringliteral" > " AnnexB stream is not supported yet" < / span > ;< / div >
< div class = "line" > < a name = "l00171" > < / a > < span class = "lineno" > 171< / span >   < span class = "keywordflow" > if< / span > (!header_parser_-> Initialize(stream_info.codec_config())) {< / div >
< div class = "line" > < a name = "l00172" > < / a > < span class = "lineno" > 172< / span >   < span class = "keywordflow" > return< / span > < a class = "code" href = "../../d2/d20/classshaka_1_1Status.html" > Status< / a > (error::ENCRYPTION_FAILURE,< / div >
< div class = "line" > < a name = "l00173" > < / a > < span class = "lineno" > 173< / span >   < span class = "stringliteral" > " Failed to read SPS and PPS data." < / span > );< / div >
< div class = "line" > < a name = "l00174" > < / a > < span class = "lineno" > 174< / span >   }< / div >
< div class = "line" > < a name = "l00175" > < / a > < span class = "lineno" > 175< / span >   }< / div >
< div class = "line" > < a name = "l00176" > < / a > < span class = "lineno" > 176< / span >   < / div >
< div class = "line" > < a name = "l00177" > < / a > < span class = "lineno" > 177< / span >   align_protected_data_ = ShouldAlignProtectedData(codec_, protection_scheme,< / div >
< div class = "line" > < a name = "l00178" > < / a > < span class = "lineno" > 178< / span >   vp9_subsample_encryption_);< / div >
< div class = "line" > < a name = "l00179" > < / a > < span class = "lineno" > 179< / span >   < / div >
< div class = "line" > < a name = "l00180" > < / a > < span class = "lineno" > 180< / span >   < span class = "keywordflow" > if< / span > (protection_scheme == kAppleSampleAesProtectionScheme) {< / div >
< div class = "line" > < a name = "l00181" > < / a > < span class = "lineno" > 181< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > kH264LeadingClearBytesSize = 32u;< / div >
< div class = "line" > < a name = "l00182" > < / a > < span class = "lineno" > 182< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > kAudioLeadingClearBytesSize = 16u;< / div >
< div class = "line" > < a name = "l00183" > < / a > < span class = "lineno" > 183< / span >   < span class = "keywordflow" > switch< / span > (codec_) {< / div >
< div class = "line" > < a name = "l00184" > < / a > < span class = "lineno" > 184< / span >   < span class = "keywordflow" > case< / span > kCodecH264:< / div >
< div class = "line" > < a name = "l00185" > < / a > < span class = "lineno" > 185< / span >   leading_clear_bytes_size_ = kH264LeadingClearBytesSize;< / div >
< div class = "line" > < a name = "l00186" > < / a > < span class = "lineno" > 186< / span >   min_protected_data_size_ =< / div >
< div class = "line" > < a name = "l00187" > < / a > < span class = "lineno" > 187< / span >   leading_clear_bytes_size_ + kAesBlockSize + 1u;< / div >
< div class = "line" > < a name = "l00188" > < / a > < span class = "lineno" > 188< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00189" > < / a > < span class = "lineno" > 189< / span >   < span class = "keywordflow" > case< / span > kCodecAAC:< / div >
< div class = "line" > < a name = "l00190" > < / a > < span class = "lineno" > 190< / span >   FALLTHROUGH_INTENDED;< / div >
< div class = "line" > < a name = "l00191" > < / a > < span class = "lineno" > 191< / span >   < span class = "keywordflow" > case< / span > kCodecAC3:< / div >
< div class = "line" > < a name = "l00192" > < / a > < span class = "lineno" > 192< / span >   leading_clear_bytes_size_ = kAudioLeadingClearBytesSize;< / div >
< div class = "line" > < a name = "l00193" > < / a > < span class = "lineno" > 193< / span >   min_protected_data_size_ = leading_clear_bytes_size_ + kAesBlockSize;< / div >
< div class = "line" > < a name = "l00194" > < / a > < span class = "lineno" > 194< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00195" > < / a > < span class = "lineno" > 195< / span >   < span class = "keywordflow" > case< / span > kCodecEAC3:< / div >
< div class = "line" > < a name = "l00196" > < / a > < span class = "lineno" > 196< / span >   < span class = "comment" > // E-AC3 encryption is handled by SampleAesEc3Cryptor, which also< / span > < / div >
< div class = "line" > < a name = "l00197" > < / a > < span class = "lineno" > 197< / span >   < span class = "comment" > // manages leading clear bytes.< / span > < / div >
< div class = "line" > < a name = "l00198" > < / a > < span class = "lineno" > 198< / span >   leading_clear_bytes_size_ = 0;< / div >
< div class = "line" > < a name = "l00199" > < / a > < span class = "lineno" > 199< / span >   min_protected_data_size_ = leading_clear_bytes_size_ + kAesBlockSize;< / div >
< div class = "line" > < a name = "l00200" > < / a > < span class = "lineno" > 200< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00201" > < / a > < span class = "lineno" > 201< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00202" > < / a > < span class = "lineno" > 202< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Unexpected codec for SAMPLE-AES " < / span > < < codec_;< / div >
< div class = "line" > < a name = "l00203" > < / a > < span class = "lineno" > 203< / span >   < span class = "keywordflow" > return< / span > < a class = "code" href = "../../d2/d20/classshaka_1_1Status.html" > Status< / a > (error::ENCRYPTION_FAILURE,< / div >
< div class = "line" > < a name = "l00204" > < / a > < span class = "lineno" > 204< / span >   < span class = "stringliteral" > " Unexpected codec for SAMPLE-AES." < / span > );< / div >
< div class = "line" > < a name = "l00205" > < / a > < span class = "lineno" > 205< / span >   }< / div >
< div class = "line" > < a name = "l00206" > < / a > < span class = "lineno" > 206< / span >   }< / div >
< div class = "line" > < a name = "l00207" > < / a > < span class = "lineno" > 207< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00208" > < / a > < span class = "lineno" > 208< / span >   }< / div >
< div class = "line" > < a name = "l00209" > < / a > < span class = "lineno" > 209< / span >   < / div >
< div class = "line" > < a name = "l00210" > < / a > < span class = "lineno" > < a class = "line" href = "../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#a8d4d840fd11c1c89b8ed03cdf076c64e" > 210< / a > < / span >   < a class = "code" href = "../../d2/d20/classshaka_1_1Status.html" > Status< / a > < a class = "code" href = "../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#a8d4d840fd11c1c89b8ed03cdf076c64e" > SubsampleGenerator::GenerateSubsamples< / a > (< / div >
< div class = "line" > < a name = "l00211" > < / a > < span class = "lineno" > 211< / span >   < span class = "keyword" > const< / span > uint8_t* frame,< / div >
< div class = "line" > < a name = "l00212" > < / a > < span class = "lineno" > 212< / span >   < span class = "keywordtype" > size_t< / span > frame_size,< / div >
< div class = "line" > < a name = "l00213" > < / a > < span class = "lineno" > 213< / span >   std::vector< SubsampleEntry> * subsamples) {< / div >
< div class = "line" > < a name = "l00214" > < / a > < span class = "lineno" > 214< / span >   subsamples-> clear();< / div >
< div class = "line" > < a name = "l00215" > < / a > < span class = "lineno" > 215< / span >   < span class = "keywordflow" > switch< / span > (codec_) {< / div >
< div class = "line" > < a name = "l00216" > < / a > < span class = "lineno" > 216< / span >   < span class = "keywordflow" > case< / span > kCodecAV1:< / div >
< div class = "line" > < a name = "l00217" > < / a > < span class = "lineno" > 217< / span >   < span class = "keywordflow" > return< / span > GenerateSubsamplesFromAV1Frame(frame, frame_size, subsamples);< / div >
< div class = "line" > < a name = "l00218" > < / a > < span class = "lineno" > 218< / span >   < span class = "keywordflow" > case< / span > kCodecH264:< / div >
< div class = "line" > < a name = "l00219" > < / a > < span class = "lineno" > 219< / span >   FALLTHROUGH_INTENDED;< / div >
< div class = "line" > < a name = "l00220" > < / a > < span class = "lineno" > 220< / span >   < span class = "keywordflow" > case< / span > kCodecH265:< / div >
< div class = "line" > < a name = "l00221" > < / a > < span class = "lineno" > 221< / span >   < span class = "keywordflow" > case< / span > kCodecH265DolbyVision:< / div >
< div class = "line" > < a name = "l00222" > < / a > < span class = "lineno" > 222< / span >   < span class = "keywordflow" > return< / span > GenerateSubsamplesFromH26xFrame(frame, frame_size, subsamples);< / div >
< div class = "line" > < a name = "l00223" > < / a > < span class = "lineno" > 223< / span >   < span class = "keywordflow" > case< / span > kCodecVP9:< / div >
< div class = "line" > < a name = "l00224" > < / a > < span class = "lineno" > 224< / span >   < span class = "keywordflow" > if< / span > (vp9_subsample_encryption_)< / div >
< div class = "line" > < a name = "l00225" > < / a > < span class = "lineno" > 225< / span >   < span class = "keywordflow" > return< / span > GenerateSubsamplesFromVPxFrame(frame, frame_size, subsamples);< / div >
< div class = "line" > < a name = "l00226" > < / a > < span class = "lineno" > 226< / span >   < span class = "comment" > // Full sample encrypted so no subsamples.< / span > < / div >
< div class = "line" > < a name = "l00227" > < / a > < span class = "lineno" > 227< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00228" > < / a > < span class = "lineno" > 228< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00229" > < / a > < span class = "lineno" > 229< / span >   < span class = "comment" > // Other codecs are full sample encrypted unless there are clear leading< / span > < / div >
< div class = "line" > < a name = "l00230" > < / a > < span class = "lineno" > 230< / span >   < span class = "comment" > // bytes.< / span > < / div >
< div class = "line" > < a name = "l00231" > < / a > < span class = "lineno" > 231< / span >   < span class = "keywordflow" > if< / span > (leading_clear_bytes_size_ > 0) {< / div >
< div class = "line" > < a name = "l00232" > < / a > < span class = "lineno" > 232< / span >   SubsampleOrganizer subsample_organizer(align_protected_data_,< / div >
< div class = "line" > < a name = "l00233" > < / a > < span class = "lineno" > 233< / span >   subsamples);< / div >
< div class = "line" > < a name = "l00234" > < / a > < span class = "lineno" > 234< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > clear_bytes =< / div >
< div class = "line" > < a name = "l00235" > < / a > < span class = "lineno" > 235< / span >   std::min(frame_size, leading_clear_bytes_size_);< / div >
< div class = "line" > < a name = "l00236" > < / a > < span class = "lineno" > 236< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > cipher_bytes = frame_size - clear_bytes;< / div >
< div class = "line" > < a name = "l00237" > < / a > < span class = "lineno" > 237< / span >   subsample_organizer.AddSubsample(clear_bytes, cipher_bytes);< / div >
< div class = "line" > < a name = "l00238" > < / a > < span class = "lineno" > 238< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00239" > < / a > < span class = "lineno" > 239< / span >   < span class = "comment" > // Full sample encrypted so no subsamples.< / span > < / div >
< div class = "line" > < a name = "l00240" > < / a > < span class = "lineno" > 240< / span >   }< / div >
< div class = "line" > < a name = "l00241" > < / a > < span class = "lineno" > 241< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00242" > < / a > < span class = "lineno" > 242< / span >   }< / div >
< div class = "line" > < a name = "l00243" > < / a > < span class = "lineno" > 243< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / 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 >   < / div >
< div class = "line" > < a name = "l00246" > < / a > < span class = "lineno" > 246< / span >   < span class = "keywordtype" > void< / span > SubsampleGenerator::InjectVpxParserForTesting(< / div >
< div class = "line" > < a name = "l00247" > < / a > < span class = "lineno" > 247< / span >   std::unique_ptr< VPxParser> vpx_parser) {< / div >
< div class = "line" > < a name = "l00248" > < / a > < span class = "lineno" > 248< / span >   vpx_parser_ = std::move(vpx_parser);< / div >
< div class = "line" > < a name = "l00249" > < / a > < span class = "lineno" > 249< / span >   }< / div >
< div class = "line" > < a name = "l00250" > < / a > < span class = "lineno" > 250< / span >   < / div >
< div class = "line" > < a name = "l00251" > < / a > < span class = "lineno" > 251< / span >   < span class = "keywordtype" > void< / span > SubsampleGenerator::InjectVideoSliceHeaderParserForTesting(< / div >
< div class = "line" > < a name = "l00252" > < / a > < span class = "lineno" > 252< / span >   std::unique_ptr< VideoSliceHeaderParser> header_parser) {< / div >
< div class = "line" > < a name = "l00253" > < / a > < span class = "lineno" > 253< / span >   header_parser_ = std::move(header_parser);< / div >
< div class = "line" > < a name = "l00254" > < / a > < span class = "lineno" > 254< / span >   }< / div >
< div class = "line" > < a name = "l00255" > < / a > < span class = "lineno" > 255< / span >   < / div >
< div class = "line" > < a name = "l00256" > < / a > < span class = "lineno" > 256< / span >   < span class = "keywordtype" > void< / span > SubsampleGenerator::InjectAV1ParserForTesting(< / div >
< div class = "line" > < a name = "l00257" > < / a > < span class = "lineno" > 257< / span >   std::unique_ptr< AV1Parser> av1_parser) {< / div >
< div class = "line" > < a name = "l00258" > < / a > < span class = "lineno" > 258< / span >   av1_parser_ = std::move(av1_parser);< / div >
< div class = "line" > < a name = "l00259" > < / a > < span class = "lineno" > 259< / span >   }< / div >
< div class = "line" > < a name = "l00260" > < / a > < span class = "lineno" > 260< / span >   < / div >
< div class = "line" > < a name = "l00261" > < / a > < span class = "lineno" > 261< / span >   Status SubsampleGenerator::GenerateSubsamplesFromVPxFrame(< / div >
< div class = "line" > < a name = "l00262" > < / a > < span class = "lineno" > 262< / span >   < span class = "keyword" > const< / span > uint8_t* frame,< / div >
< div class = "line" > < a name = "l00263" > < / a > < span class = "lineno" > 263< / span >   < span class = "keywordtype" > size_t< / span > frame_size,< / div >
< div class = "line" > < a name = "l00264" > < / a > < span class = "lineno" > 264< / span >   std::vector< SubsampleEntry> * subsamples) {< / div >
< div class = "line" > < a name = "l00265" > < / a > < span class = "lineno" > 265< / span >   DCHECK(vpx_parser_);< / div >
< div class = "line" > < a name = "l00266" > < / a > < span class = "lineno" > 266< / span >   std::vector< VPxFrameInfo> vpx_frames;< / div >
< div class = "line" > < a name = "l00267" > < / a > < span class = "lineno" > 267< / span >   < span class = "keywordflow" > if< / span > (!vpx_parser_-> Parse(frame, frame_size, & vpx_frames))< / div >
< div class = "line" > < a name = "l00268" > < / a > < span class = "lineno" > 268< / span >   < span class = "keywordflow" > return< / span > Status(error::ENCRYPTION_FAILURE, < span class = "stringliteral" > " Failed to parse vpx frame." < / span > );< / 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 >   SubsampleOrganizer subsample_organizer(align_protected_data_, subsamples);< / div >
< div class = "line" > < a name = "l00271" > < / a > < span class = "lineno" > 271< / span >   < / div >
< div class = "line" > < a name = "l00272" > < / a > < span class = "lineno" > 272< / span >   < span class = "keywordtype" > size_t< / span > total_size = 0;< / div >
< div class = "line" > < a name = "l00273" > < / a > < span class = "lineno" > 273< / span >   < span class = "keywordflow" > for< / span > (< span class = "keyword" > const< / span > VPxFrameInfo& frame : vpx_frames) {< / div >
< div class = "line" > < a name = "l00274" > < / a > < span class = "lineno" > 274< / span >   subsample_organizer.AddSubsample(< / div >
< div class = "line" > < a name = "l00275" > < / a > < span class = "lineno" > 275< / span >   frame.uncompressed_header_size,< / div >
< div class = "line" > < a name = "l00276" > < / a > < span class = "lineno" > 276< / span >   frame.frame_size - frame.uncompressed_header_size);< / div >
< div class = "line" > < a name = "l00277" > < / a > < span class = "lineno" > 277< / span >   total_size += frame.frame_size;< / 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 >   < span class = "comment" > // Add subsample for the superframe index if exists.< / span > < / div >
< div class = "line" > < a name = "l00280" > < / a > < span class = "lineno" > 280< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > bool< / span > is_superframe = vpx_frames.size() > 1;< / div >
< div class = "line" > < a name = "l00281" > < / a > < span class = "lineno" > 281< / span >   < span class = "keywordflow" > if< / span > (is_superframe) {< / div >
< div class = "line" > < a name = "l00282" > < / a > < span class = "lineno" > 282< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > index_size = frame_size - total_size;< / div >
< div class = "line" > < a name = "l00283" > < / a > < span class = "lineno" > 283< / span >   DCHECK_LE(index_size, 2 + vpx_frames.size() * 4);< / div >
< div class = "line" > < a name = "l00284" > < / a > < span class = "lineno" > 284< / span >   DCHECK_GE(index_size, 2 + vpx_frames.size() * 1);< / div >
< div class = "line" > < a name = "l00285" > < / a > < span class = "lineno" > 285< / span >   subsample_organizer.AddSubsample(index_size, 0);< / div >
< div class = "line" > < a name = "l00286" > < / a > < span class = "lineno" > 286< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00287" > < / a > < span class = "lineno" > 287< / span >   DCHECK_EQ(total_size, frame_size);< / div >
< div class = "line" > < a name = "l00288" > < / a > < span class = "lineno" > 288< / span >   }< / div >
< div class = "line" > < a name = "l00289" > < / a > < span class = "lineno" > 289< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00290" > < / a > < span class = "lineno" > 290< / span >   }< / 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 >   Status SubsampleGenerator::GenerateSubsamplesFromH26xFrame(< / div >
< div class = "line" > < a name = "l00293" > < / a > < span class = "lineno" > 293< / span >   < span class = "keyword" > const< / span > uint8_t* frame,< / div >
< div class = "line" > < a name = "l00294" > < / a > < span class = "lineno" > 294< / span >   < span class = "keywordtype" > size_t< / span > frame_size,< / div >
< div class = "line" > < a name = "l00295" > < / a > < span class = "lineno" > 295< / span >   std::vector< SubsampleEntry> * subsamples) {< / div >
< div class = "line" > < a name = "l00296" > < / a > < span class = "lineno" > 296< / span >   DCHECK_NE(nalu_length_size_, 0u);< / div >
< div class = "line" > < a name = "l00297" > < / a > < span class = "lineno" > 297< / span >   DCHECK(header_parser_);< / div >
< div class = "line" > < a name = "l00298" > < / a > < span class = "lineno" > 298< / span >   < / div >
< div class = "line" > < a name = "l00299" > < / a > < span class = "lineno" > 299< / span >   SubsampleOrganizer subsample_organizer(align_protected_data_, subsamples);< / div >
< div class = "line" > < a name = "l00300" > < / a > < span class = "lineno" > 300< / span >   < / div >
< div class = "line" > < a name = "l00301" > < / a > < span class = "lineno" > 301< / span >   < span class = "keyword" > const< / span > Nalu::CodecType nalu_type =< / div >
< div class = "line" > < a name = "l00302" > < / a > < span class = "lineno" > 302< / span >   (codec_ == kCodecH265 || codec_ == kCodecH265DolbyVision) ? Nalu::kH265< / div >
< div class = "line" > < a name = "l00303" > < / a > < span class = "lineno" > 303< / span >   : Nalu::kH264;< / div >
< div class = "line" > < a name = "l00304" > < / a > < span class = "lineno" > 304< / span >   NaluReader reader(nalu_type, nalu_length_size_, frame, frame_size);< / div >
< div class = "line" > < a name = "l00305" > < / a > < span class = "lineno" > 305< / span >   < / div >
< div class = "line" > < a name = "l00306" > < / a > < span class = "lineno" > 306< / span >   Nalu nalu;< / div >
< div class = "line" > < a name = "l00307" > < / a > < span class = "lineno" > 307< / span >   NaluReader::Result result;< / div >
< div class = "line" > < a name = "l00308" > < / a > < span class = "lineno" > 308< / span >   < span class = "keywordflow" > while< / span > ((result = reader.Advance(& nalu)) == NaluReader::kOk) {< / div >
< div class = "line" > < a name = "l00309" > < / a > < span class = "lineno" > 309< / span >   < span class = "comment" > // |header_parser_| is only used if |leading_clear_bytes_size_| is not< / span > < / div >
< div class = "line" > < a name = "l00310" > < / a > < span class = "lineno" > 310< / span >   < span class = "comment" > // availble. See lines below.< / span > < / div >
< div class = "line" > < a name = "l00311" > < / a > < span class = "lineno" > 311< / span >   < span class = "keywordflow" > if< / span > (leading_clear_bytes_size_ == 0 & & !header_parser_-> ProcessNalu(nalu)) {< / div >
< div class = "line" > < a name = "l00312" > < / a > < span class = "lineno" > 312< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Failed to process NAL unit: NAL type = " < / span > < < nalu.type();< / div >
< div class = "line" > < a name = "l00313" > < / a > < span class = "lineno" > 313< / span >   < span class = "keywordflow" > return< / span > Status(error::ENCRYPTION_FAILURE, < span class = "stringliteral" > " Failed to process NAL unit." < / span > );< / div >
< div class = "line" > < a name = "l00314" > < / a > < span class = "lineno" > 314< / span >   }< / div >
< div class = "line" > < a name = "l00315" > < / a > < span class = "lineno" > 315< / span >   < / div >
< div class = "line" > < a name = "l00316" > < / a > < span class = "lineno" > 316< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > nalu_total_size = nalu.header_size() + nalu.payload_size();< / div >
< div class = "line" > < a name = "l00317" > < / a > < span class = "lineno" > 317< / span >   < span class = "keywordtype" > size_t< / span > clear_bytes = 0;< / div >
< div class = "line" > < a name = "l00318" > < / a > < span class = "lineno" > 318< / span >   < span class = "keywordflow" > if< / span > (nalu.is_video_slice() & & nalu_total_size > = min_protected_data_size_) {< / div >
< div class = "line" > < a name = "l00319" > < / a > < span class = "lineno" > 319< / span >   clear_bytes = leading_clear_bytes_size_;< / div >
< div class = "line" > < a name = "l00320" > < / a > < span class = "lineno" > 320< / span >   < span class = "keywordflow" > if< / span > (clear_bytes == 0) {< / div >
< div class = "line" > < a name = "l00321" > < / a > < span class = "lineno" > 321< / span >   < span class = "comment" > // For video-slice NAL units, encrypt the video slice. This skips< / span > < / div >
< div class = "line" > < a name = "l00322" > < / a > < span class = "lineno" > 322< / span >   < span class = "comment" > // the frame header.< / span > < / div >
< div class = "line" > < a name = "l00323" > < / a > < span class = "lineno" > 323< / span >   < span class = "keyword" > const< / span > int64_t video_slice_header_size =< / div >
< div class = "line" > < a name = "l00324" > < / a > < span class = "lineno" > 324< / span >   header_parser_-> GetHeaderSize(nalu);< / div >
< div class = "line" > < a name = "l00325" > < / a > < span class = "lineno" > 325< / span >   < span class = "keywordflow" > if< / span > (video_slice_header_size < 0) {< / div >
< div class = "line" > < a name = "l00326" > < / a > < span class = "lineno" > 326< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Failed to read slice header." < / span > ;< / div >
< div class = "line" > < a name = "l00327" > < / a > < span class = "lineno" > 327< / span >   < span class = "keywordflow" > return< / span > Status(error::ENCRYPTION_FAILURE,< / div >
< div class = "line" > < a name = "l00328" > < / a > < span class = "lineno" > 328< / span >   < span class = "stringliteral" > " Failed to read slice header." < / span > );< / 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 >   clear_bytes = nalu.header_size() + video_slice_header_size;< / div >
< div class = "line" > < a name = "l00331" > < / a > < span class = "lineno" > 331< / span >   }< / div >
< div class = "line" > < a name = "l00332" > < / a > < span class = "lineno" > 332< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00333" > < / a > < span class = "lineno" > 333< / span >   < span class = "comment" > // For non-video-slice or small NAL units, don' t encrypt.< / span > < / div >
< div class = "line" > < a name = "l00334" > < / a > < span class = "lineno" > 334< / span >   clear_bytes = nalu_total_size;< / div >
< div class = "line" > < a name = "l00335" > < / a > < span class = "lineno" > 335< / span >   }< / div >
< div class = "line" > < a name = "l00336" > < / a > < span class = "lineno" > 336< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > cipher_bytes = nalu_total_size - clear_bytes;< / div >
< div class = "line" > < a name = "l00337" > < / a > < span class = "lineno" > 337< / span >   subsample_organizer.AddSubsample(nalu_length_size_ + clear_bytes,< / div >
< div class = "line" > < a name = "l00338" > < / a > < span class = "lineno" > 338< / span >   cipher_bytes);< / div >
< div class = "line" > < a name = "l00339" > < / a > < span class = "lineno" > 339< / span >   }< / div >
< div class = "line" > < a name = "l00340" > < / a > < span class = "lineno" > 340< / span >   < span class = "keywordflow" > if< / span > (result != NaluReader::kEOStream) {< / div >
< div class = "line" > < a name = "l00341" > < / a > < span class = "lineno" > 341< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Failed to parse NAL units." < / span > ;< / div >
< div class = "line" > < a name = "l00342" > < / a > < span class = "lineno" > 342< / span >   < span class = "keywordflow" > return< / span > Status(error::ENCRYPTION_FAILURE, < span class = "stringliteral" > " Failed to parse NAL units." < / 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 >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00345" > < / a > < span class = "lineno" > 345< / span >   }< / div >
< div class = "line" > < a name = "l00346" > < / a > < span class = "lineno" > 346< / span >   < / div >
< div class = "line" > < a name = "l00347" > < / a > < span class = "lineno" > 347< / span >   Status SubsampleGenerator::GenerateSubsamplesFromAV1Frame(< / div >
< div class = "line" > < a name = "l00348" > < / a > < span class = "lineno" > 348< / span >   < span class = "keyword" > const< / span > uint8_t* frame,< / div >
< div class = "line" > < a name = "l00349" > < / a > < span class = "lineno" > 349< / span >   < span class = "keywordtype" > size_t< / span > frame_size,< / div >
< div class = "line" > < a name = "l00350" > < / a > < span class = "lineno" > 350< / span >   std::vector< SubsampleEntry> * subsamples) {< / div >
< div class = "line" > < a name = "l00351" > < / a > < span class = "lineno" > 351< / span >   DCHECK(av1_parser_);< / div >
< div class = "line" > < a name = "l00352" > < / a > < span class = "lineno" > 352< / span >   std::vector< AV1Parser::Tile> av1_tiles;< / div >
< div class = "line" > < a name = "l00353" > < / a > < span class = "lineno" > 353< / span >   < span class = "keywordflow" > if< / span > (!av1_parser_-> Parse(frame, frame_size, & av1_tiles))< / div >
< div class = "line" > < a name = "l00354" > < / a > < span class = "lineno" > 354< / span >   < span class = "keywordflow" > return< / span > Status(error::ENCRYPTION_FAILURE, < span class = "stringliteral" > " Failed to parse AV1 frame." < / 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 >   SubsampleOrganizer subsample_organizer(align_protected_data_, subsamples);< / div >
< div class = "line" > < a name = "l00357" > < / a > < span class = "lineno" > 357< / span >   < / div >
< div class = "line" > < a name = "l00358" > < / a > < span class = "lineno" > 358< / span >   < span class = "keywordtype" > size_t< / span > last_tile_end_offset = 0;< / div >
< div class = "line" > < a name = "l00359" > < / a > < span class = "lineno" > 359< / span >   < span class = "keywordflow" > for< / span > (< span class = "keyword" > const< / span > AV1Parser::Tile& tile : av1_tiles) {< / div >
< div class = "line" > < a name = "l00360" > < / a > < span class = "lineno" > 360< / span >   DCHECK_LE(last_tile_end_offset, tile.start_offset_in_bytes);< / div >
< div class = "line" > < a name = "l00361" > < / a > < span class = "lineno" > 361< / span >   < span class = "comment" > // Per AV1 in ISO-BMFF spec [1], only decode_tile is encrypted.< / span > < / div >
< div class = "line" > < a name = "l00362" > < / a > < span class = "lineno" > 362< / span >   < span class = "comment" > // [1] https://aomediacodec.github.io/av1-isobmff/#subsample-encryption< / span > < / div >
< div class = "line" > < a name = "l00363" > < / a > < span class = "lineno" > 363< / span >   subsample_organizer.AddSubsample(< / div >
< div class = "line" > < a name = "l00364" > < / a > < span class = "lineno" > 364< / span >   tile.start_offset_in_bytes - last_tile_end_offset, tile.size_in_bytes);< / div >
< div class = "line" > < a name = "l00365" > < / a > < span class = "lineno" > 365< / span >   last_tile_end_offset = tile.start_offset_in_bytes + tile.size_in_bytes;< / div >
< div class = "line" > < a name = "l00366" > < / a > < span class = "lineno" > 366< / span >   }< / div >
< div class = "line" > < a name = "l00367" > < / a > < span class = "lineno" > 367< / span >   DCHECK_LE(last_tile_end_offset, frame_size);< / div >
< div class = "line" > < a name = "l00368" > < / a > < span class = "lineno" > 368< / span >   < span class = "keywordflow" > if< / span > (last_tile_end_offset < frame_size)< / div >
< div class = "line" > < a name = "l00369" > < / a > < span class = "lineno" > 369< / span >   subsample_organizer.AddSubsample(frame_size - last_tile_end_offset, 0);< / div >
< div class = "line" > < a name = "l00370" > < / a > < span class = "lineno" > 370< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00371" > < / a > < span class = "lineno" > 371< / span >   }< / div >
< div class = "line" > < a name = "l00372" > < / a > < span class = "lineno" > 372< / span >   < / div >
< div class = "line" > < a name = "l00373" > < / a > < span class = "lineno" > 373< / span >   } < span class = "comment" > // namespace media< / span > < / div >
< div class = "line" > < a name = "l00374" > < / a > < span class = "lineno" > 374< / span >   } < span class = "comment" > // namespace shaka< / span > < / div >
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< / div > <!-- fragment --> < / div > <!-- contents -->
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< div class = "ttc" id = "aclassshaka_1_1media_1_1H265VideoSliceHeaderParser_html" > < div class = "ttname" > < a href = "../../d1/d79/classshaka_1_1media_1_1H265VideoSliceHeaderParser.html" > shaka::media::H265VideoSliceHeaderParser< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d2/d33/video__slice__header__parser_8h_source.html#l00062" > video_slice_header_parser.h:62< / 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_1Status_html" > < div class = "ttname" > < a href = "../../d2/d20/classshaka_1_1Status.html" > shaka::Status< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d1/d13/status_8h_source.html#l00110" > status.h:110< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1VP9Parser_html" > < div class = "ttname" > < a href = "../../db/d5a/classshaka_1_1media_1_1VP9Parser.html" > shaka::media::VP9Parser< / a > < / div > < div class = "ttdoc" > Class to parse a vp9 bit stream.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../df/d8a/vp9__parser_8h_source.html#l00020" > vp9_parser.h:20< / a > < / div > < / div >
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< div class = "ttc" id = "aclassshaka_1_1media_1_1SubsampleGenerator_html_a1674b4a68974db06ad4efa9a9b699a46" > < div class = "ttname" > < a href = "../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#a1674b4a68974db06ad4efa9a9b699a46" > shaka::media::SubsampleGenerator::SubsampleGenerator< / a > < / div > < div class = "ttdeci" > SubsampleGenerator(bool vp9_subsample_encryption)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d7/d1e/subsample__generator_8cc_source.html#l00120" > subsample_generator.cc:120< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1SubsampleGenerator_html_ac4478f9099344a05be5b9b3e4e209817" > < div class = "ttname" > < a href = "../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#ac4478f9099344a05be5b9b3e4e209817" > shaka::media::SubsampleGenerator::Initialize< / a > < / div > < div class = "ttdeci" > virtual Status Initialize(FourCC protection_scheme, const StreamInfo & stream_info)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d7/d1e/subsample__generator_8cc_source.html#l00125" > subsample_generator.cc:125< / a > < / div > < / div >
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< div class = "ttc" id = "aclassshaka_1_1media_1_1H264VideoSliceHeaderParser_html" > < div class = "ttname" > < a href = "../../da/df0/classshaka_1_1media_1_1H264VideoSliceHeaderParser.html" > shaka::media::H264VideoSliceHeaderParser< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d2/d33/video__slice__header__parser_8h_source.html#l00044" > video_slice_header_parser.h:44< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1SubsampleGenerator_html_a8d4d840fd11c1c89b8ed03cdf076c64e" > < div class = "ttname" > < a href = "../../d0/d9f/classshaka_1_1media_1_1SubsampleGenerator.html#a8d4d840fd11c1c89b8ed03cdf076c64e" > shaka::media::SubsampleGenerator::GenerateSubsamples< / a > < / div > < div class = "ttdeci" > virtual Status GenerateSubsamples(const uint8_t *frame, size_t frame_size, std::vector< SubsampleEntry > *subsamples)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d7/d1e/subsample__generator_8cc_source.html#l00210" > subsample_generator.cc:210< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1AV1Parser_html" > < div class = "ttname" > < a href = "../../db/dc7/classshaka_1_1media_1_1AV1Parser.html" > shaka::media::AV1Parser< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/d18/av1__parser_8h_source.html#l00022" > av1_parser.h:22< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1StreamInfo_html" > < div class = "ttname" > < a href = "../../d5/db1/classshaka_1_1media_1_1StreamInfo.html" > shaka::media::StreamInfo< / a > < / div > < div class = "ttdoc" > Abstract class holds stream information.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d8/daa/stream__info_8h_source.html#l00065" > stream_info.h:65< / a > < / div > < / div >
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Generated on Tue Jun 22 2021 00:16:04 for Shaka Packager SDK by   < a href = "http://www.doxygen.org/index.html" >
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