2017-02-11 01:23:57 +00:00
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< li class = "navelem" > < a class = "el" href = "../../dir_39dc0668bd5a501998f94e8b4e546c71.html" > media< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_ba94ecd487194410fd7c4b70c530929c.html" > crypto< / a > < / li > < / ul >
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< div class = "title" > encryption_handler.cc< / div > < / div >
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< div class = "contents" >
< div class = "fragment" > < div class = "line" > < a name = "l00001" > < / a > < span class = "lineno" > 1< / span >   < span class = "comment" > // Copyright 2017 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/crypto/encryption_handler.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 < stddef.h> < / span > < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < span class = "preprocessor" > #include < stdint.h> < / 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 < limits> < / span > < / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < span class = "preprocessor" > #include " packager/media/base/aes_encryptor.h" < / span > < / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < span class = "preprocessor" > #include " packager/media/base/aes_pattern_cryptor.h" < / span > < / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < span class = "preprocessor" > #include " packager/media/base/key_source.h" < / span > < / div >
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< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < span class = "preprocessor" > #include " packager/media/base/media_sample.h" < / span > < / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < span class = "preprocessor" > #include " packager/media/base/video_stream_info.h" < / span > < / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < span class = "preprocessor" > #include " packager/media/codecs/video_slice_header_parser.h" < / span > < / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < span class = "preprocessor" > #include " packager/media/codecs/vp8_parser.h" < / span > < / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < span class = "preprocessor" > #include " packager/media/codecs/vp9_parser.h" < / 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" > namespace < / span > shaka {< / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   < span class = "keyword" > namespace < / span > media {< / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   < / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   < span class = "keyword" > namespace < / span > {< / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > kCencBlockSize = 16u;< / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   < / div >
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< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   < span class = "comment" > // The default KID for key rotation is all 0s.< / span > < / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   < span class = "keyword" > const< / span > uint8_t kKeyRotationDefaultKeyId[] = {< / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,< / 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 = "comment" > // Adds one or more subsamples to |*subsamples|. This may add more than one< / span > < / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   < span class = "comment" > // if one of the values overflows the integer in the subsample.< / span > < / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   < span class = "keywordtype" > void< / span > AddSubsample(uint64_t clear_bytes,< / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   uint64_t cipher_bytes,< / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   DecryptConfig* decrypt_config) {< / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   CHECK_LT(cipher_bytes, std::numeric_limits< uint32_t> ::max());< / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   < span class = "keyword" > const< / span > uint64_t kUInt16Max = std::numeric_limits< uint16_t> ::max();< / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   < span class = "keywordflow" > while< / span > (clear_bytes > kUInt16Max) {< / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   decrypt_config-> AddSubsample(kUInt16Max, 0);< / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   clear_bytes -= kUInt16Max;< / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   }< / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   < / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   < span class = "keywordflow" > if< / span > (clear_bytes > 0 || cipher_bytes > 0)< / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   decrypt_config-> AddSubsample(clear_bytes, cipher_bytes);< / 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 >   < / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   uint8_t GetNaluLengthSize(< span class = "keyword" > const< / span > StreamInfo& stream_info) {< / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   < span class = "keywordflow" > if< / span > (stream_info.stream_type() != kStreamVideo)< / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   < span class = "keywordflow" > return< / span > 0;< / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   < span class = "keyword" > const< / span > VideoStreamInfo& video_stream_info =< / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / 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 = "l00056" > < / a > < span class = "lineno" > 56< / span >   < span class = "keywordflow" > return< / span > video_stream_info.nalu_length_size();< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   }< / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   < / div >
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< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   std::string GetStreamLabelForEncryption(< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   < span class = "keyword" > const< / span > StreamInfo& stream_info,< / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   < span class = "keyword" > const< / span > std::function< std::string(< / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   < span class = "keyword" > const< / span > EncryptionParams::EncryptedStreamAttributes& stream_attributes)> & < / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   stream_label_func) {< / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   EncryptionParams::EncryptedStreamAttributes stream_attributes;< / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   < span class = "keywordflow" > if< / span > (stream_info.stream_type() == kStreamAudio) {< / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   stream_attributes.stream_type =< / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   EncryptionParams::EncryptedStreamAttributes::kAudio;< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (stream_info.stream_type() == kStreamVideo) {< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < span class = "keyword" > const< / span > VideoStreamInfo& video_stream_info =< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / 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 = "l00071" > < / a > < span class = "lineno" > 71< / span >   stream_attributes.stream_type =< / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   EncryptionParams::EncryptedStreamAttributes::kVideo;< / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   stream_attributes.oneof.video.width = video_stream_info.width();< / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   stream_attributes.oneof.video.height = video_stream_info.height();< / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   }< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   < span class = "keywordflow" > return< / span > stream_label_func(stream_attributes);< / 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 >   } < span class = "comment" > // namespace< / 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 >   EncryptionHandler::EncryptionHandler(< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   < span class = "keyword" > const< / span > EncryptionOptions& encryption_options,< / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   KeySource* key_source)< / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   : encryption_options_(encryption_options), key_source_(key_source) {}< / 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 >   EncryptionHandler::~EncryptionHandler() {}< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   < / div >
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< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > < a class = "line" href = "../../d6/d4c/classshaka_1_1media_1_1EncryptionHandler.html#a3f1808a4386081e5e1c9a798a1a69dd0" > 87< / a > < / span >   Status < a class = "code" href = "../../d6/d4c/classshaka_1_1media_1_1EncryptionHandler.html#a3f1808a4386081e5e1c9a798a1a69dd0" > EncryptionHandler::InitializeInternal< / a > () {< / div >
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< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   < span class = "keywordflow" > if< / span > (!encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#a586017f7bf6490e06a61c1f6eaf7970c" > stream_label_func< / a > ) {< / div >
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< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   < span class = "keywordflow" > return< / span > Status(error::INVALID_ARGUMENT, < span class = "stringliteral" > " Stream label function not set." < / span > );< / div >
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< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   }< / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   < span class = "keywordflow" > if< / span > (num_input_streams() != 1 || next_output_stream_index() != 1) {< / div >
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< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   < span class = "keywordflow" > return< / span > Status(error::INVALID_ARGUMENT,< / div >
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< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   < span class = "stringliteral" > " Expects exactly one input and output." < / span > );< / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   }< / div >
< div class = "line" > < a name = "l00095" > < / a > < span class = "lineno" > 95< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   }< / div >
2017-06-13 22:09:24 +00:00
< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   < / div >
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< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > < a class = "line" href = "../../d6/d4c/classshaka_1_1media_1_1EncryptionHandler.html#a7887e6060eb572036674ecb9a7e045c4" > 98< / a > < / span >   Status < a class = "code" href = "../../d6/d4c/classshaka_1_1media_1_1EncryptionHandler.html#a7887e6060eb572036674ecb9a7e045c4" > EncryptionHandler::Process< / a > (std::unique_ptr< StreamData> stream_data) {< / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   Status status;< / div >
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< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   < span class = "keywordflow" > switch< / span > (stream_data-> stream_data_type) {< / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   < span class = "keywordflow" > case< / span > StreamDataType::kStreamInfo:< / div >
< div class = "line" > < a name = "l00102" > < / a > < span class = "lineno" > 102< / span >   status = ProcessStreamInfo(stream_data-> stream_info.get());< / div >
< div class = "line" > < a name = "l00103" > < / a > < span class = "lineno" > 103< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   < span class = "keywordflow" > case< / span > StreamDataType::kSegmentInfo: {< / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   < a class = "code" href = "../../d0/dc0/structshaka_1_1media_1_1SegmentInfo.html" > SegmentInfo< / a > * segment_info = stream_data-> segment_info.get();< / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   segment_info-> is_encrypted = remaining_clear_lead_ < = 0;< / div >
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   < / div >
< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > 108< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > bool< / span > key_rotation_enabled = crypto_period_duration_ != 0;< / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   < span class = "keywordflow" > if< / span > (key_rotation_enabled)< / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   segment_info-> key_rotation_encryption_config = encryption_config_;< / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   < span class = "keywordflow" > if< / span > (!segment_info-> is_subsegment) {< / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   < span class = "keywordflow" > if< / span > (key_rotation_enabled)< / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   check_new_crypto_period_ = < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   < span class = "keywordflow" > if< / span > (remaining_clear_lead_ > 0)< / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   remaining_clear_lead_ -= segment_info-> duration;< / 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 >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   }< / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > 119< / span >   < span class = "keywordflow" > case< / span > StreamDataType::kMediaSample:< / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   status = ProcessMediaSample(stream_data-> media_sample.get());< / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   VLOG(3) < < < span class = "stringliteral" > " Stream data type " < / span > < / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   < < < span class = "keyword" > static_cast< < / span > < span class = "keywordtype" > int< / span > < span class = "keyword" > > < / span > (stream_data-> stream_data_type) < < < span class = "stringliteral" > " ignored." < / span > ;< / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > 125< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   }< / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   < span class = "keywordflow" > return< / span > status.ok() ? < a class = "code" href = "../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#accd62dd4def920571f95f4e1a98ab7ca" > Dispatch< / a > (std::move(stream_data)) : status;< / 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 >
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< div class = "line" > < a name = "l00130" > < / a > < span class = "lineno" > 130< / span >   Status EncryptionHandler::ProcessStreamInfo(< a class = "code" href = "../../d5/db1/classshaka_1_1media_1_1StreamInfo.html" > StreamInfo< / a > * stream_info) {< / div >
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< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > 131< / span >   < span class = "keywordflow" > if< / span > (stream_info-> is_encrypted()) {< / div >
2017-06-30 20:14:31 +00:00
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   < span class = "keywordflow" > return< / span > Status(error::INVALID_ARGUMENT,< / div >
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< div class = "line" > < a name = "l00133" > < / a > < span class = "lineno" > 133< / span >   < span class = "stringliteral" > " Input stream is already encrypted." < / span > );< / div >
< div class = "line" > < a name = "l00134" > < / a > < span class = "lineno" > 134< / span >   }< / div >
< div class = "line" > < a name = "l00135" > < / a > < span class = "lineno" > 135< / span >   < / div >
< div class = "line" > < a name = "l00136" > < / a > < span class = "lineno" > 136< / span >   remaining_clear_lead_ =< / div >
< div class = "line" > < a name = "l00137" > < / a > < span class = "lineno" > 137< / span >   encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#a3d58dc01a4af0ebfb56f3c4979f745f7" > clear_lead_in_seconds< / a > * stream_info-> time_scale();< / div >
< div class = "line" > < a name = "l00138" > < / a > < span class = "lineno" > 138< / span >   crypto_period_duration_ =< / div >
< div class = "line" > < a name = "l00139" > < / a > < span class = "lineno" > 139< / span >   encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#a20acea0141ca7c8dd57d0129c53a6d13" > crypto_period_duration_in_seconds< / a > *< / div >
< div class = "line" > < a name = "l00140" > < / a > < span class = "lineno" > 140< / span >   stream_info-> time_scale();< / div >
< div class = "line" > < a name = "l00141" > < / a > < span class = "lineno" > 141< / span >   codec_ = stream_info-> codec();< / div >
< div class = "line" > < a name = "l00142" > < / a > < span class = "lineno" > 142< / span >   nalu_length_size_ = GetNaluLengthSize(*stream_info);< / div >
< div class = "line" > < a name = "l00143" > < / a > < span class = "lineno" > 143< / span >   stream_label_ = GetStreamLabelForEncryption(< / div >
< div class = "line" > < a name = "l00144" > < / a > < span class = "lineno" > 144< / span >   *stream_info, encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#a586017f7bf6490e06a61c1f6eaf7970c" > stream_label_func< / a > );< / div >
< div class = "line" > < a name = "l00145" > < / a > < span class = "lineno" > 145< / span >   < span class = "keywordflow" > switch< / span > (codec_) {< / div >
< div class = "line" > < a name = "l00146" > < / a > < span class = "lineno" > 146< / span >   < span class = "keywordflow" > case< / span > kCodecVP9:< / div >
< div class = "line" > < a name = "l00147" > < / a > < span class = "lineno" > 147< / span >   < span class = "keywordflow" > if< / span > (encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#a2f971f63a7525a777d5578d87ef0c99f" > vp9_subsample_encryption< / a > )< / div >
< div class = "line" > < a name = "l00148" > < / a > < span class = "lineno" > 148< / span >   vpx_parser_.reset(< span class = "keyword" > new< / span > VP9Parser);< / div >
< div class = "line" > < a name = "l00149" > < / a > < span class = "lineno" > 149< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00150" > < / a > < span class = "lineno" > 150< / span >   < span class = "keywordflow" > case< / span > kCodecH264:< / div >
< div class = "line" > < a name = "l00151" > < / a > < span class = "lineno" > 151< / span >   header_parser_.reset(< span class = "keyword" > new< / span > H264VideoSliceHeaderParser);< / div >
< div class = "line" > < a name = "l00152" > < / a > < span class = "lineno" > 152< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00153" > < / a > < span class = "lineno" > 153< / span >   < span class = "keywordflow" > case< / span > kCodecH265:< / div >
< div class = "line" > < a name = "l00154" > < / a > < span class = "lineno" > 154< / span >   header_parser_.reset(< span class = "keyword" > new< / span > H265VideoSliceHeaderParser);< / div >
< div class = "line" > < a name = "l00155" > < / a > < span class = "lineno" > 155< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00156" > < / a > < span class = "lineno" > 156< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00157" > < / a > < span class = "lineno" > 157< / span >   < span class = "comment" > // Other codecs should have nalu length size == 0.< / span > < / div >
< div class = "line" > < a name = "l00158" > < / a > < span class = "lineno" > 158< / span >   < span class = "keywordflow" > if< / span > (nalu_length_size_ > 0) {< / div >
< div class = "line" > < a name = "l00159" > < / a > < span class = "lineno" > 159< / span >   LOG(WARNING) < < < span class = "stringliteral" > " Unknown video codec ' " < / span > < < codec_ < < < span class = "stringliteral" > " ' " < / span > ;< / div >
< div class = "line" > < a name = "l00160" > < / a > < span class = "lineno" > 160< / span >   < span class = "keywordflow" > return< / span > Status(error::ENCRYPTION_FAILURE, < span class = "stringliteral" > " Unknown video codec." < / span > );< / div >
< div class = "line" > < a name = "l00161" > < / a > < span class = "lineno" > 161< / span >   }< / div >
< div class = "line" > < a name = "l00162" > < / a > < span class = "lineno" > 162< / span >   }< / div >
< div class = "line" > < a name = "l00163" > < / a > < span class = "lineno" > 163< / span >   < span class = "keywordflow" > if< / span > (header_parser_) {< / div >
< div class = "line" > < a name = "l00164" > < / a > < span class = "lineno" > 164< / span >   CHECK_NE(nalu_length_size_, 0u) < < < span class = "stringliteral" > " AnnexB stream is not supported yet" < / span > ;< / div >
< div class = "line" > < a name = "l00165" > < / a > < span class = "lineno" > 165< / span >   < span class = "keywordflow" > if< / span > (!header_parser_-> Initialize(stream_info-> codec_config())) {< / div >
< div class = "line" > < a name = "l00166" > < / a > < span class = "lineno" > 166< / span >   < span class = "keywordflow" > return< / span > Status(error::ENCRYPTION_FAILURE,< / div >
< div class = "line" > < a name = "l00167" > < / a > < span class = "lineno" > 167< / span >   < span class = "stringliteral" > " Fail to read SPS and PPS data." < / span > );< / 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 >   }< / div >
< div class = "line" > < a name = "l00170" > < / a > < span class = "lineno" > 170< / span >   < / div >
< div class = "line" > < a name = "l00171" > < / a > < span class = "lineno" > 171< / span >   Status status = SetupProtectionPattern(stream_info-> stream_type());< / div >
< div class = "line" > < a name = "l00172" > < / a > < span class = "lineno" > 172< / span >   < span class = "keywordflow" > if< / span > (!status.ok())< / div >
< div class = "line" > < a name = "l00173" > < / a > < span class = "lineno" > 173< / span >   < span class = "keywordflow" > return< / span > status;< / 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 >   EncryptionKey encryption_key;< / div >
< div class = "line" > < a name = "l00176" > < / a > < span class = "lineno" > 176< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > bool< / span > key_rotation_enabled = crypto_period_duration_ != 0;< / div >
< div class = "line" > < a name = "l00177" > < / a > < span class = "lineno" > 177< / span >   < span class = "keywordflow" > if< / span > (key_rotation_enabled) {< / div >
< div class = "line" > < a name = "l00178" > < / a > < span class = "lineno" > 178< / span >   check_new_crypto_period_ = < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00179" > < / a > < span class = "lineno" > 179< / span >   < span class = "comment" > // Setup dummy key id and key to signal encryption for key rotation.< / span > < / div >
< div class = "line" > < a name = "l00180" > < / a > < span class = "lineno" > 180< / span >   encryption_key.key_id.assign(< / div >
< div class = "line" > < a name = "l00181" > < / a > < span class = "lineno" > 181< / span >   kKeyRotationDefaultKeyId,< / div >
< div class = "line" > < a name = "l00182" > < / a > < span class = "lineno" > 182< / span >   kKeyRotationDefaultKeyId + < span class = "keyword" > sizeof< / span > (kKeyRotationDefaultKeyId));< / div >
< div class = "line" > < a name = "l00183" > < / a > < span class = "lineno" > 183< / span >   < span class = "comment" > // The key is not really used to encrypt any data. It is there just for< / span > < / div >
< div class = "line" > < a name = "l00184" > < / a > < span class = "lineno" > 184< / span >   < span class = "comment" > // convenience.< / span > < / div >
< div class = "line" > < a name = "l00185" > < / a > < span class = "lineno" > 185< / span >   encryption_key.key = encryption_key.key_id;< / div >
< div class = "line" > < a name = "l00186" > < / a > < span class = "lineno" > 186< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00187" > < / a > < span class = "lineno" > 187< / span >   status = key_source_-> < a class = "code" href = "../../d1/d1f/classshaka_1_1media_1_1KeySource.html#af56c833453d65297c4dc96c9d2f83e1a" > GetKey< / a > (stream_label_, & encryption_key);< / div >
< div class = "line" > < a name = "l00188" > < / a > < span class = "lineno" > 188< / span >   < span class = "keywordflow" > if< / span > (!status.ok())< / div >
< div class = "line" > < a name = "l00189" > < / a > < span class = "lineno" > 189< / span >   < span class = "keywordflow" > return< / span > status;< / 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" > if< / span > (!CreateEncryptor(encryption_key))< / div >
< div class = "line" > < a name = "l00192" > < / a > < span class = "lineno" > 192< / span >   < span class = "keywordflow" > return< / span > Status(error::ENCRYPTION_FAILURE, < span class = "stringliteral" > " Failed to create encryptor" < / span > );< / div >
< div class = "line" > < a name = "l00193" > < / a > < span class = "lineno" > 193< / span >   < / div >
< div class = "line" > < a name = "l00194" > < / a > < span class = "lineno" > 194< / span >   stream_info-> set_is_encrypted(< span class = "keyword" > true< / span > );< / div >
< div class = "line" > < a name = "l00195" > < / a > < span class = "lineno" > 195< / span >   stream_info-> set_has_clear_lead(encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#a3d58dc01a4af0ebfb56f3c4979f745f7" > clear_lead_in_seconds< / a > > < / div >
< div class = "line" > < a name = "l00196" > < / a > < span class = "lineno" > 196< / span >   0);< / div >
< div class = "line" > < a name = "l00197" > < / a > < span class = "lineno" > 197< / span >   stream_info-> set_encryption_config(*encryption_config_);< / div >
< div class = "line" > < a name = "l00198" > < / a > < span class = "lineno" > 198< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / 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 >   Status EncryptionHandler::ProcessMediaSample(MediaSample* sample) {< / div >
< div class = "line" > < a name = "l00202" > < / a > < span class = "lineno" > 202< / span >   < span class = "comment" > // We need to parse the frame (which also updates the vpx parser) even if the< / span > < / div >
< div class = "line" > < a name = "l00203" > < / a > < span class = "lineno" > 203< / span >   < span class = "comment" > // frame is not encrypted as the next (encrypted) frame may be dependent on< / span > < / div >
< div class = "line" > < a name = "l00204" > < / a > < span class = "lineno" > 204< / span >   < span class = "comment" > // this clear frame.< / span > < / div >
< div class = "line" > < a name = "l00205" > < / a > < span class = "lineno" > 205< / span >   std::vector< VPxFrameInfo> vpx_frames;< / div >
< div class = "line" > < a name = "l00206" > < / a > < span class = "lineno" > 206< / span >   < span class = "keywordflow" > if< / span > (vpx_parser_ & & < / div >
< div class = "line" > < a name = "l00207" > < / a > < span class = "lineno" > 207< / span >   !vpx_parser_-> Parse(sample-> data(), sample-> data_size(), & vpx_frames)) {< / div >
< div class = "line" > < a name = "l00208" > < / a > < span class = "lineno" > 208< / 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 = "l00209" > < / a > < span class = "lineno" > 209< / span >   }< / div >
< div class = "line" > < a name = "l00210" > < / a > < span class = "lineno" > 210< / span >   < / div >
< div class = "line" > < a name = "l00211" > < / a > < span class = "lineno" > 211< / span >   < span class = "comment" > // Need to setup the encryptor for new segments even if this segment does not< / span > < / div >
< div class = "line" > < a name = "l00212" > < / a > < span class = "lineno" > 212< / span >   < span class = "comment" > // need to be encrypted, so we can signal encryption metadata earlier to< / span > < / div >
< div class = "line" > < a name = "l00213" > < / a > < span class = "lineno" > 213< / span >   < span class = "comment" > // allows clients to prefetch the keys.< / span > < / div >
< div class = "line" > < a name = "l00214" > < / a > < span class = "lineno" > 214< / span >   < span class = "keywordflow" > if< / span > (check_new_crypto_period_) {< / div >
< div class = "line" > < a name = "l00215" > < / a > < span class = "lineno" > 215< / span >   < span class = "keyword" > const< / span > int64_t current_crypto_period_index =< / div >
< div class = "line" > < a name = "l00216" > < / a > < span class = "lineno" > 216< / span >   sample-> dts() / crypto_period_duration_;< / div >
< div class = "line" > < a name = "l00217" > < / a > < span class = "lineno" > 217< / span >   < span class = "keywordflow" > if< / span > (current_crypto_period_index != prev_crypto_period_index_) {< / div >
< div class = "line" > < a name = "l00218" > < / a > < span class = "lineno" > 218< / span >   EncryptionKey encryption_key;< / div >
< div class = "line" > < a name = "l00219" > < / a > < span class = "lineno" > 219< / span >   Status status = key_source_-> < a class = "code" href = "../../d1/d1f/classshaka_1_1media_1_1KeySource.html#a34340247a575bc693d14c3bef9102258" > GetCryptoPeriodKey< / a > (< / div >
< div class = "line" > < a name = "l00220" > < / a > < span class = "lineno" > 220< / span >   current_crypto_period_index, stream_label_, & encryption_key);< / div >
< div class = "line" > < a name = "l00221" > < / a > < span class = "lineno" > 221< / span >   < span class = "keywordflow" > if< / span > (!status.ok())< / div >
< div class = "line" > < a name = "l00222" > < / a > < span class = "lineno" > 222< / span >   < span class = "keywordflow" > return< / span > status;< / div >
< div class = "line" > < a name = "l00223" > < / a > < span class = "lineno" > 223< / span >   < span class = "keywordflow" > if< / span > (!CreateEncryptor(encryption_key))< / div >
< div class = "line" > < a name = "l00224" > < / a > < span class = "lineno" > 224< / span >   < span class = "keywordflow" > return< / span > Status(error::ENCRYPTION_FAILURE, < span class = "stringliteral" > " Failed to create encryptor" < / span > );< / div >
2017-06-29 22:09:23 +00:00
< div class = "line" > < a name = "l00225" > < / a > < span class = "lineno" > 225< / span >   prev_crypto_period_index_ = current_crypto_period_index;< / div >
< div class = "line" > < a name = "l00226" > < / a > < span class = "lineno" > 226< / span >   }< / div >
< div class = "line" > < a name = "l00227" > < / a > < span class = "lineno" > 227< / span >   check_new_crypto_period_ = < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00228" > < / a > < span class = "lineno" > 228< / span >   }< / div >
< div class = "line" > < a name = "l00229" > < / a > < span class = "lineno" > 229< / span >   < / div >
< div class = "line" > < a name = "l00230" > < / a > < span class = "lineno" > 230< / span >   < span class = "keywordflow" > if< / span > (remaining_clear_lead_ > 0)< / div >
< div class = "line" > < a name = "l00231" > < / a > < span class = "lineno" > 231< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00232" > < / a > < span class = "lineno" > 232< / span >   < / div >
< div class = "line" > < a name = "l00233" > < / a > < span class = "lineno" > 233< / span >   std::unique_ptr< DecryptConfig> decrypt_config(< span class = "keyword" > new< / span > DecryptConfig(< / div >
< div class = "line" > < a name = "l00234" > < / a > < span class = "lineno" > 234< / span >   encryption_config_-> key_id, encryptor_-> iv(),< / div >
< div class = "line" > < a name = "l00235" > < / a > < span class = "lineno" > 235< / span >   std::vector< SubsampleEntry> (), encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#ac858b4c03e49e871e07e38fc35893088" > protection_scheme< / a > ,< / div >
< div class = "line" > < a name = "l00236" > < / a > < span class = "lineno" > 236< / span >   crypt_byte_block_, skip_byte_block_));< / div >
< div class = "line" > < a name = "l00237" > < / a > < span class = "lineno" > 237< / span >   < span class = "keywordtype" > bool< / span > result = < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00238" > < / a > < span class = "lineno" > 238< / span >   < span class = "keywordflow" > if< / span > (vpx_parser_) {< / div >
< div class = "line" > < a name = "l00239" > < / a > < span class = "lineno" > 239< / span >   result = EncryptVpxFrame(vpx_frames, sample, decrypt_config.get());< / div >
< div class = "line" > < a name = "l00240" > < / a > < span class = "lineno" > 240< / span >   < span class = "keywordflow" > if< / span > (result) {< / div >
< div class = "line" > < a name = "l00241" > < / a > < span class = "lineno" > 241< / span >   DCHECK_EQ(decrypt_config-> GetTotalSizeOfSubsamples(),< / div >
< div class = "line" > < a name = "l00242" > < / a > < span class = "lineno" > 242< / span >   sample-> data_size());< / div >
< div class = "line" > < a name = "l00243" > < / a > < span class = "lineno" > 243< / span >   }< / div >
< div class = "line" > < a name = "l00244" > < / a > < span class = "lineno" > 244< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (header_parser_) {< / div >
< div class = "line" > < a name = "l00245" > < / a > < span class = "lineno" > 245< / span >   result = EncryptNalFrame(sample, decrypt_config.get());< / div >
< div class = "line" > < a name = "l00246" > < / a > < span class = "lineno" > 246< / span >   < span class = "keywordflow" > if< / span > (result) {< / div >
< div class = "line" > < a name = "l00247" > < / a > < span class = "lineno" > 247< / span >   DCHECK_EQ(decrypt_config-> GetTotalSizeOfSubsamples(),< / div >
< div class = "line" > < a name = "l00248" > < / a > < span class = "lineno" > 248< / span >   sample-> data_size());< / 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 >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00251" > < / a > < span class = "lineno" > 251< / span >   < span class = "keywordflow" > if< / span > (sample-> data_size() > leading_clear_bytes_size_) {< / div >
< div class = "line" > < a name = "l00252" > < / a > < span class = "lineno" > 252< / span >   EncryptBytes(sample-> writable_data() + leading_clear_bytes_size_,< / div >
< div class = "line" > < a name = "l00253" > < / a > < span class = "lineno" > 253< / span >   sample-> data_size() - leading_clear_bytes_size_);< / 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 = "keywordflow" > if< / span > (!result)< / div >
< div class = "line" > < a name = "l00257" > < / a > < span class = "lineno" > 257< / span >   < span class = "keywordflow" > return< / span > Status(error::ENCRYPTION_FAILURE, < span class = "stringliteral" > " Failed to encrypt samples." < / span > );< / div >
< div class = "line" > < a name = "l00258" > < / a > < span class = "lineno" > 258< / span >   sample-> set_is_encrypted(< span class = "keyword" > true< / span > );< / div >
< div class = "line" > < a name = "l00259" > < / a > < span class = "lineno" > 259< / span >   sample-> set_decrypt_config(std::move(decrypt_config));< / div >
< div class = "line" > < a name = "l00260" > < / a > < span class = "lineno" > 260< / span >   encryptor_-> UpdateIv();< / div >
< div class = "line" > < a name = "l00261" > < / a > < span class = "lineno" > 261< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00262" > < / a > < span class = "lineno" > 262< / span >   }< / div >
< div class = "line" > < a name = "l00263" > < / a > < span class = "lineno" > 263< / span >   < / div >
< div class = "line" > < a name = "l00264" > < / a > < span class = "lineno" > 264< / span >   Status EncryptionHandler::SetupProtectionPattern(StreamType stream_type) {< / div >
< div class = "line" > < a name = "l00265" > < / a > < span class = "lineno" > 265< / span >   < span class = "keywordflow" > switch< / span > (encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#ac858b4c03e49e871e07e38fc35893088" > protection_scheme< / a > ) {< / div >
< div class = "line" > < a name = "l00266" > < / a > < span class = "lineno" > 266< / span >   < span class = "keywordflow" > case< / span > kAppleSampleAesProtectionScheme: {< / div >
< div class = "line" > < a name = "l00267" > < / a > < span class = "lineno" > 267< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > kH264LeadingClearBytesSize = 32u;< / div >
< div class = "line" > < a name = "l00268" > < / a > < span class = "lineno" > 268< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > kSmallNalUnitSize = 32u + 16u;< / div >
< div class = "line" > < a name = "l00269" > < / a > < span class = "lineno" > 269< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > kAudioLeadingClearBytesSize = 16u;< / div >
< div class = "line" > < a name = "l00270" > < / a > < span class = "lineno" > 270< / span >   < span class = "keywordflow" > switch< / span > (codec_) {< / div >
< div class = "line" > < a name = "l00271" > < / a > < span class = "lineno" > 271< / span >   < span class = "keywordflow" > case< / span > kCodecH264:< / div >
< div class = "line" > < a name = "l00272" > < / a > < span class = "lineno" > 272< / span >   < span class = "comment" > // Apple Sample AES uses 1:9 pattern for video.< / span > < / div >
< div class = "line" > < a name = "l00273" > < / a > < span class = "lineno" > 273< / span >   crypt_byte_block_ = 1u;< / div >
< div class = "line" > < a name = "l00274" > < / a > < span class = "lineno" > 274< / span >   skip_byte_block_ = 9u;< / div >
< div class = "line" > < a name = "l00275" > < / a > < span class = "lineno" > 275< / span >   leading_clear_bytes_size_ = kH264LeadingClearBytesSize;< / div >
< div class = "line" > < a name = "l00276" > < / a > < span class = "lineno" > 276< / span >   min_protected_data_size_ = kSmallNalUnitSize + 1u;< / div >
< div class = "line" > < a name = "l00277" > < / a > < span class = "lineno" > 277< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00278" > < / a > < span class = "lineno" > 278< / span >   < span class = "keywordflow" > case< / span > kCodecAAC:< / div >
< div class = "line" > < a name = "l00279" > < / a > < span class = "lineno" > 279< / span >   FALLTHROUGH_INTENDED;< / div >
< div class = "line" > < a name = "l00280" > < / a > < span class = "lineno" > 280< / span >   < span class = "keywordflow" > case< / span > kCodecAC3:< / div >
< div class = "line" > < a name = "l00281" > < / a > < span class = "lineno" > 281< / span >   < span class = "comment" > // Audio is whole sample encrypted. We could not use a< / span > < / div >
< div class = "line" > < a name = "l00282" > < / a > < span class = "lineno" > 282< / span >   < span class = "comment" > // crypto_byte_block_ of 1 here as if there is one crypto block< / span > < / div >
< div class = "line" > < a name = "l00283" > < / a > < span class = "lineno" > 283< / span >   < span class = "comment" > // remaining, it need not be encrypted for video but it needs to be< / span > < / div >
< div class = "line" > < a name = "l00284" > < / a > < span class = "lineno" > 284< / span >   < span class = "comment" > // encrypted for audio.< / span > < / div >
< div class = "line" > < a name = "l00285" > < / a > < span class = "lineno" > 285< / span >   crypt_byte_block_ = 0u;< / div >
< div class = "line" > < a name = "l00286" > < / a > < span class = "lineno" > 286< / span >   skip_byte_block_ = 0u;< / div >
< div class = "line" > < a name = "l00287" > < / a > < span class = "lineno" > 287< / span >   leading_clear_bytes_size_ = kAudioLeadingClearBytesSize;< / div >
< div class = "line" > < a name = "l00288" > < / a > < span class = "lineno" > 288< / span >   min_protected_data_size_ = leading_clear_bytes_size_ + 1u;< / div >
< div class = "line" > < a name = "l00289" > < / a > < span class = "lineno" > 289< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00290" > < / a > < span class = "lineno" > 290< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00291" > < / a > < span class = "lineno" > 291< / span >   < span class = "keywordflow" > return< / span > Status(error::ENCRYPTION_FAILURE,< / div >
< div class = "line" > < a name = "l00292" > < / a > < span class = "lineno" > 292< / span >   < span class = "stringliteral" > " Only AAC/AC3 and H264 are supported in Sample AES." < / span > );< / div >
< div class = "line" > < a name = "l00293" > < / a > < span class = "lineno" > 293< / span >   }< / div >
< div class = "line" > < a name = "l00294" > < / a > < span class = "lineno" > 294< / span >   < span class = "keywordflow" > break< / span > ;< / 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" > case< / span > FOURCC_cbcs:< / div >
< div class = "line" > < a name = "l00297" > < / a > < span class = "lineno" > 297< / span >   FALLTHROUGH_INTENDED;< / div >
< div class = "line" > < a name = "l00298" > < / a > < span class = "lineno" > 298< / span >   < span class = "keywordflow" > case< / span > FOURCC_cens:< / div >
< div class = "line" > < a name = "l00299" > < / a > < span class = "lineno" > 299< / span >   < span class = "keywordflow" > if< / span > (stream_type == kStreamVideo) {< / div >
< div class = "line" > < a name = "l00300" > < / a > < span class = "lineno" > 300< / span >   < span class = "comment" > // Use 1:9 pattern for video.< / span > < / div >
< div class = "line" > < a name = "l00301" > < / a > < span class = "lineno" > 301< / span >   crypt_byte_block_ = 1u;< / div >
< div class = "line" > < a name = "l00302" > < / a > < span class = "lineno" > 302< / span >   skip_byte_block_ = 9u;< / div >
< div class = "line" > < a name = "l00303" > < / a > < span class = "lineno" > 303< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00304" > < / a > < span class = "lineno" > 304< / span >   < span class = "comment" > // Tracks other than video are protected using whole-block full-sample< / span > < / div >
< div class = "line" > < a name = "l00305" > < / a > < span class = "lineno" > 305< / span >   < span class = "comment" > // encryption, which is essentially a pattern of 1:0. Note that this may< / span > < / div >
< div class = "line" > < a name = "l00306" > < / a > < span class = "lineno" > 306< / span >   < span class = "comment" > // not be the same as the non-pattern based encryption counterparts,< / span > < / div >
< div class = "line" > < a name = "l00307" > < / a > < span class = "lineno" > 307< / span >   < span class = "comment" > // e.g. in ' cens' for full sample encryption, the whole sample is< / span > < / div >
< div class = "line" > < a name = "l00308" > < / a > < span class = "lineno" > 308< / span >   < span class = "comment" > // encrypted up to the last 16-byte boundary, see 23001-7:2016(E) 9.7;< / span > < / div >
< div class = "line" > < a name = "l00309" > < / a > < span class = "lineno" > 309< / span >   < span class = "comment" > // while in ' cenc' for full sample encryption, the last partial 16-byte< / span > < / div >
< div class = "line" > < a name = "l00310" > < / a > < span class = "lineno" > 310< / span >   < span class = "comment" > // block is also encrypted, see 23001-7:2016(E) 9.4.2. Another< / span > < / div >
< div class = "line" > < a name = "l00311" > < / a > < span class = "lineno" > 311< / span >   < span class = "comment" > // difference is the use of constant iv.< / span > < / div >
< div class = "line" > < a name = "l00312" > < / a > < span class = "lineno" > 312< / span >   crypt_byte_block_ = 1u;< / div >
< div class = "line" > < a name = "l00313" > < / a > < span class = "lineno" > 313< / span >   skip_byte_block_ = 0u;< / 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 >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00316" > < / a > < span class = "lineno" > 316< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00317" > < / a > < span class = "lineno" > 317< / span >   < span class = "comment" > // Not using pattern encryption.< / span > < / div >
< div class = "line" > < a name = "l00318" > < / a > < span class = "lineno" > 318< / span >   crypt_byte_block_ = 0u;< / div >
< div class = "line" > < a name = "l00319" > < / a > < span class = "lineno" > 319< / span >   skip_byte_block_ = 0u;< / div >
< div class = "line" > < a name = "l00320" > < / a > < span class = "lineno" > 320< / span >   }< / div >
< div class = "line" > < a name = "l00321" > < / a > < span class = "lineno" > 321< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00322" > < / a > < span class = "lineno" > 322< / span >   }< / 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 = "keywordtype" > bool< / span > EncryptionHandler::CreateEncryptor(< span class = "keyword" > const< / span > EncryptionKey& encryption_key) {< / div >
< div class = "line" > < a name = "l00325" > < / a > < span class = "lineno" > 325< / span >   std::unique_ptr< AesCryptor> encryptor;< / div >
< div class = "line" > < a name = "l00326" > < / a > < span class = "lineno" > 326< / span >   < span class = "keywordflow" > switch< / span > (encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#ac858b4c03e49e871e07e38fc35893088" > protection_scheme< / a > ) {< / div >
< div class = "line" > < a name = "l00327" > < / a > < span class = "lineno" > 327< / span >   < span class = "keywordflow" > case< / span > FOURCC_cenc:< / div >
< div class = "line" > < a name = "l00328" > < / a > < span class = "lineno" > 328< / span >   encryptor.reset(< span class = "keyword" > new< / span > AesCtrEncryptor);< / div >
< div class = "line" > < a name = "l00329" > < / a > < span class = "lineno" > 329< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00330" > < / a > < span class = "lineno" > 330< / span >   < span class = "keywordflow" > case< / span > FOURCC_cbc1:< / div >
< div class = "line" > < a name = "l00331" > < / a > < span class = "lineno" > 331< / span >   encryptor.reset(< span class = "keyword" > new< / span > AesCbcEncryptor(kNoPadding));< / div >
< div class = "line" > < a name = "l00332" > < / a > < span class = "lineno" > 332< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00333" > < / a > < span class = "lineno" > 333< / span >   < span class = "keywordflow" > case< / span > FOURCC_cens:< / div >
< div class = "line" > < a name = "l00334" > < / a > < span class = "lineno" > 334< / span >   encryptor.reset(< span class = "keyword" > new< / span > AesPatternCryptor(< / div >
< div class = "line" > < a name = "l00335" > < / a > < span class = "lineno" > 335< / span >   crypt_byte_block_, skip_byte_block_,< / div >
< div class = "line" > < a name = "l00336" > < / a > < span class = "lineno" > 336< / span >   < a class = "code" href = "../../d3/dfe/classshaka_1_1media_1_1AesPatternCryptor.html#a54fd35d7782d3b4948c7eb68387711f0a76b19d202e22b2b0f661f933b47b3b16" > AesPatternCryptor::kEncryptIfCryptByteBlockRemaining< / a > ,< / div >
< div class = "line" > < a name = "l00337" > < / a > < span class = "lineno" > 337< / span >   AesCryptor::kDontUseConstantIv,< / div >
< div class = "line" > < a name = "l00338" > < / a > < span class = "lineno" > 338< / span >   std::unique_ptr< AesCryptor> (< span class = "keyword" > new< / span > AesCtrEncryptor())));< / div >
< div class = "line" > < a name = "l00339" > < / a > < span class = "lineno" > 339< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00340" > < / a > < span class = "lineno" > 340< / span >   < span class = "keywordflow" > case< / span > FOURCC_cbcs:< / div >
< div class = "line" > < a name = "l00341" > < / a > < span class = "lineno" > 341< / span >   encryptor.reset(< span class = "keyword" > new< / span > AesPatternCryptor(< / div >
< div class = "line" > < a name = "l00342" > < / a > < span class = "lineno" > 342< / span >   crypt_byte_block_, skip_byte_block_,< / div >
< div class = "line" > < a name = "l00343" > < / a > < span class = "lineno" > 343< / span >   < a class = "code" href = "../../d3/dfe/classshaka_1_1media_1_1AesPatternCryptor.html#a54fd35d7782d3b4948c7eb68387711f0a76b19d202e22b2b0f661f933b47b3b16" > AesPatternCryptor::kEncryptIfCryptByteBlockRemaining< / a > ,< / div >
< div class = "line" > < a name = "l00344" > < / a > < span class = "lineno" > 344< / span >   AesCryptor::kUseConstantIv,< / div >
< div class = "line" > < a name = "l00345" > < / a > < span class = "lineno" > 345< / span >   std::unique_ptr< AesCryptor> (< span class = "keyword" > new< / span > AesCbcEncryptor(kNoPadding))));< / div >
< div class = "line" > < a name = "l00346" > < / a > < span class = "lineno" > 346< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00347" > < / a > < span class = "lineno" > 347< / span >   < span class = "keywordflow" > case< / span > kAppleSampleAesProtectionScheme:< / div >
< div class = "line" > < a name = "l00348" > < / a > < span class = "lineno" > 348< / span >   < span class = "keywordflow" > if< / span > (crypt_byte_block_ == 0 & & skip_byte_block_ == 0) {< / div >
< div class = "line" > < a name = "l00349" > < / a > < span class = "lineno" > 349< / span >   encryptor.reset(< / div >
< div class = "line" > < a name = "l00350" > < / a > < span class = "lineno" > 350< / span >   < span class = "keyword" > new< / span > AesCbcEncryptor(kNoPadding, AesCryptor::kUseConstantIv));< / div >
< div class = "line" > < a name = "l00351" > < / a > < span class = "lineno" > 351< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00352" > < / a > < span class = "lineno" > 352< / span >   encryptor.reset(< span class = "keyword" > new< / span > AesPatternCryptor(< / div >
< div class = "line" > < a name = "l00353" > < / a > < span class = "lineno" > 353< / span >   crypt_byte_block_, skip_byte_block_,< / div >
< div class = "line" > < a name = "l00354" > < / a > < span class = "lineno" > 354< / span >   < a class = "code" href = "../../d3/dfe/classshaka_1_1media_1_1AesPatternCryptor.html#a54fd35d7782d3b4948c7eb68387711f0a09674e418b61763fdc5cf22c248efd4f" > AesPatternCryptor::kSkipIfCryptByteBlockRemaining< / a > ,< / div >
< div class = "line" > < a name = "l00355" > < / a > < span class = "lineno" > 355< / span >   AesCryptor::kUseConstantIv,< / div >
< div class = "line" > < a name = "l00356" > < / a > < span class = "lineno" > 356< / span >   std::unique_ptr< AesCryptor> (< span class = "keyword" > new< / span > AesCbcEncryptor(kNoPadding))));< / 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 = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00359" > < / a > < span class = "lineno" > 359< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00360" > < / a > < span class = "lineno" > 360< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Unsupported protection scheme." < / span > ;< / div >
< div class = "line" > < a name = "l00361" > < / a > < span class = "lineno" > 361< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / 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 >   std::vector< uint8_t> iv = encryption_key.iv;< / div >
< div class = "line" > < a name = "l00365" > < / a > < span class = "lineno" > 365< / span >   < span class = "keywordflow" > if< / span > (iv.empty()) {< / div >
< div class = "line" > < a name = "l00366" > < / a > < span class = "lineno" > 366< / span >   < span class = "keywordflow" > if< / span > (!< a class = "code" href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a40d9a82d274d6fbaee5346328f11dedd" > AesCryptor::GenerateRandomIv< / a > (encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#ac858b4c03e49e871e07e38fc35893088" > protection_scheme< / a > ,< / div >
< div class = "line" > < a name = "l00367" > < / a > < span class = "lineno" > 367< / span >   & iv)) {< / div >
< div class = "line" > < a name = "l00368" > < / a > < span class = "lineno" > 368< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Failed to generate random iv." < / span > ;< / div >
< div class = "line" > < a name = "l00369" > < / a > < span class = "lineno" > 369< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00370" > < / a > < span class = "lineno" > 370< / span >   }< / 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 >   < span class = "keyword" > const< / span > < span class = "keywordtype" > bool< / span > initialized =< / div >
< div class = "line" > < a name = "l00373" > < / a > < span class = "lineno" > 373< / span >   encryptor-> InitializeWithIv(encryption_key.key, iv);< / div >
< div class = "line" > < a name = "l00374" > < / a > < span class = "lineno" > 374< / span >   encryptor_ = std::move(encryptor);< / div >
< div class = "line" > < a name = "l00375" > < / a > < span class = "lineno" > 375< / span >   < / div >
< div class = "line" > < a name = "l00376" > < / a > < span class = "lineno" > 376< / span >   encryption_config_.reset(< span class = "keyword" > new< / span > EncryptionConfig);< / div >
< div class = "line" > < a name = "l00377" > < / a > < span class = "lineno" > 377< / span >   encryption_config_-> protection_scheme = encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#ac858b4c03e49e871e07e38fc35893088" > protection_scheme< / a > ;< / div >
< div class = "line" > < a name = "l00378" > < / a > < span class = "lineno" > 378< / span >   encryption_config_-> crypt_byte_block = crypt_byte_block_;< / div >
< div class = "line" > < a name = "l00379" > < / a > < span class = "lineno" > 379< / span >   encryption_config_-> skip_byte_block = skip_byte_block_;< / div >
< div class = "line" > < a name = "l00380" > < / a > < span class = "lineno" > 380< / span >   < span class = "keywordflow" > if< / span > (encryptor_-> use_constant_iv()) {< / div >
< div class = "line" > < a name = "l00381" > < / a > < span class = "lineno" > 381< / span >   encryption_config_-> per_sample_iv_size = 0;< / div >
< div class = "line" > < a name = "l00382" > < / a > < span class = "lineno" > 382< / span >   encryption_config_-> constant_iv = iv;< / div >
< div class = "line" > < a name = "l00383" > < / a > < span class = "lineno" > 383< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00384" > < / a > < span class = "lineno" > 384< / span >   encryption_config_-> per_sample_iv_size = < span class = "keyword" > static_cast< < / span > uint8_t< span class = "keyword" > > < / span > (iv.size());< / 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 >   encryption_config_-> key_id = encryption_key.key_id;< / div >
< div class = "line" > < a name = "l00387" > < / a > < span class = "lineno" > 387< / span >   encryption_config_-> key_system_info = encryption_key.key_system_info;< / div >
< div class = "line" > < a name = "l00388" > < / a > < span class = "lineno" > 388< / span >   < span class = "keywordflow" > return< / span > initialized;< / div >
< div class = "line" > < a name = "l00389" > < / a > < span class = "lineno" > 389< / span >   }< / div >
< div class = "line" > < a name = "l00390" > < / a > < span class = "lineno" > 390< / span >   < / div >
< div class = "line" > < a name = "l00391" > < / a > < span class = "lineno" > 391< / span >   < span class = "keywordtype" > bool< / span > EncryptionHandler::EncryptVpxFrame(< / div >
< div class = "line" > < a name = "l00392" > < / a > < span class = "lineno" > 392< / span >   < span class = "keyword" > const< / span > std::vector< VPxFrameInfo> & vpx_frames,< / div >
< div class = "line" > < a name = "l00393" > < / a > < span class = "lineno" > 393< / span >   MediaSample* sample,< / div >
< div class = "line" > < a name = "l00394" > < / a > < span class = "lineno" > 394< / span >   DecryptConfig* decrypt_config) {< / div >
< div class = "line" > < a name = "l00395" > < / a > < span class = "lineno" > 395< / span >   uint8_t* data = sample-> writable_data();< / div >
< div class = "line" > < a name = "l00396" > < / a > < span class = "lineno" > 396< / span >   < span class = "keywordflow" > for< / span > (< span class = "keyword" > const< / span > VPxFrameInfo& frame : vpx_frames) {< / div >
< div class = "line" > < a name = "l00397" > < / a > < span class = "lineno" > 397< / span >   uint16_t clear_bytes =< / div >
< div class = "line" > < a name = "l00398" > < / a > < span class = "lineno" > 398< / span >   < span class = "keyword" > static_cast< < / span > uint16_t< span class = "keyword" > > < / span > (frame.uncompressed_header_size);< / div >
< div class = "line" > < a name = "l00399" > < / a > < span class = "lineno" > 399< / span >   uint32_t cipher_bytes = < span class = "keyword" > static_cast< < / span > uint32_t< span class = "keyword" > > < / span > (< / div >
< div class = "line" > < a name = "l00400" > < / a > < span class = "lineno" > 400< / span >   frame.frame_size - frame.uncompressed_header_size);< / 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 >   < span class = "comment" > // " VP Codec ISO Media File Format Binding" document requires that the< / span > < / div >
< div class = "line" > < a name = "l00403" > < / a > < span class = "lineno" > 403< / span >   < span class = "comment" > // encrypted bytes of each frame within the superframe must be block< / span > < / div >
< div class = "line" > < a name = "l00404" > < / a > < span class = "lineno" > 404< / span >   < span class = "comment" > // aligned so that the counter state can be computed for each frame< / span > < / div >
< div class = "line" > < a name = "l00405" > < / a > < span class = "lineno" > 405< / span >   < span class = "comment" > // within the superframe.< / span > < / div >
< div class = "line" > < a name = "l00406" > < / a > < span class = "lineno" > 406< / span >   < span class = "comment" > // ISO/IEC 23001-7:2016 10.2 ' cbc1' 10.3 ' cens' < / span > < / div >
< div class = "line" > < a name = "l00407" > < / a > < span class = "lineno" > 407< / span >   < span class = "comment" > // The BytesOfProtectedData size SHALL be a multiple of 16 bytes to< / span > < / div >
< div class = "line" > < a name = "l00408" > < / a > < span class = "lineno" > 408< / span >   < span class = "comment" > // avoid partial blocks in Subsamples.< / span > < / div >
< div class = "line" > < a name = "l00409" > < / a > < span class = "lineno" > 409< / span >   < span class = "comment" > // For consistency, apply block alignment to all frames.< / span > < / div >
< div class = "line" > < a name = "l00410" > < / a > < span class = "lineno" > 410< / span >   < span class = "keyword" > const< / span > uint16_t misalign_bytes = cipher_bytes % kCencBlockSize;< / div >
< div class = "line" > < a name = "l00411" > < / a > < span class = "lineno" > 411< / span >   clear_bytes += misalign_bytes;< / div >
< div class = "line" > < a name = "l00412" > < / a > < span class = "lineno" > 412< / span >   cipher_bytes -= misalign_bytes;< / 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 >   decrypt_config-> AddSubsample(clear_bytes, cipher_bytes);< / div >
< div class = "line" > < a name = "l00415" > < / a > < span class = "lineno" > 415< / span >   < span class = "keywordflow" > if< / span > (cipher_bytes > 0)< / div >
< div class = "line" > < a name = "l00416" > < / a > < span class = "lineno" > 416< / span >   EncryptBytes(data + clear_bytes, cipher_bytes);< / div >
< div class = "line" > < a name = "l00417" > < / a > < span class = "lineno" > 417< / span >   data += frame.frame_size;< / div >
< div class = "line" > < a name = "l00418" > < / a > < span class = "lineno" > 418< / span >   }< / div >
< div class = "line" > < a name = "l00419" > < / a > < span class = "lineno" > 419< / span >   < span class = "comment" > // Add subsample for the superframe index if exists.< / span > < / div >
< div class = "line" > < a name = "l00420" > < / a > < span class = "lineno" > 420< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > bool< / span > is_superframe = vpx_frames.size() > 1;< / div >
< div class = "line" > < a name = "l00421" > < / a > < span class = "lineno" > 421< / span >   < span class = "keywordflow" > if< / span > (is_superframe) {< / div >
< div class = "line" > < a name = "l00422" > < / a > < span class = "lineno" > 422< / span >   < span class = "keywordtype" > size_t< / span > index_size = sample-> data() + sample-> data_size() - data;< / div >
< div class = "line" > < a name = "l00423" > < / a > < span class = "lineno" > 423< / span >   DCHECK_LE(index_size, 2 + vpx_frames.size() * 4);< / div >
< div class = "line" > < a name = "l00424" > < / a > < span class = "lineno" > 424< / span >   DCHECK_GE(index_size, 2 + vpx_frames.size() * 1);< / div >
< div class = "line" > < a name = "l00425" > < / a > < span class = "lineno" > 425< / span >   uint16_t clear_bytes = < span class = "keyword" > static_cast< < / span > uint16_t< span class = "keyword" > > < / span > (index_size);< / div >
< div class = "line" > < a name = "l00426" > < / a > < span class = "lineno" > 426< / span >   uint32_t cipher_bytes = 0;< / div >
< div class = "line" > < a name = "l00427" > < / a > < span class = "lineno" > 427< / span >   decrypt_config-> AddSubsample(clear_bytes, cipher_bytes);< / div >
< div class = "line" > < a name = "l00428" > < / a > < span class = "lineno" > 428< / span >   }< / div >
< div class = "line" > < a name = "l00429" > < / a > < span class = "lineno" > 429< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00430" > < / a > < span class = "lineno" > 430< / span >   }< / div >
< div class = "line" > < a name = "l00431" > < / a > < span class = "lineno" > 431< / span >   < / div >
< div class = "line" > < a name = "l00432" > < / a > < span class = "lineno" > 432< / span >   < span class = "keywordtype" > bool< / span > EncryptionHandler::EncryptNalFrame(MediaSample* sample,< / div >
< div class = "line" > < a name = "l00433" > < / a > < span class = "lineno" > 433< / span >   DecryptConfig* decrypt_config) {< / div >
< div class = "line" > < a name = "l00434" > < / a > < span class = "lineno" > 434< / span >   DCHECK_NE(nalu_length_size_, 0u);< / div >
< div class = "line" > < a name = "l00435" > < / a > < span class = "lineno" > 435< / span >   DCHECK(header_parser_);< / div >
< div class = "line" > < a name = "l00436" > < / a > < span class = "lineno" > 436< / span >   < span class = "keyword" > const< / span > Nalu::CodecType nalu_type =< / div >
< div class = "line" > < a name = "l00437" > < / a > < span class = "lineno" > 437< / span >   (codec_ == kCodecH265) ? Nalu::kH265 : Nalu::kH264;< / div >
< div class = "line" > < a name = "l00438" > < / a > < span class = "lineno" > 438< / span >   NaluReader reader(nalu_type, nalu_length_size_, sample-> writable_data(),< / div >
< div class = "line" > < a name = "l00439" > < / a > < span class = "lineno" > 439< / span >   sample-> data_size());< / div >
< div class = "line" > < a name = "l00440" > < / a > < span class = "lineno" > 440< / span >   < / div >
< div class = "line" > < a name = "l00441" > < / a > < span class = "lineno" > 441< / span >   < span class = "comment" > // Store the current length of clear data. This is used to squash< / span > < / div >
< div class = "line" > < a name = "l00442" > < / a > < span class = "lineno" > 442< / span >   < span class = "comment" > // multiple unencrypted NAL units into fewer subsample entries.< / span > < / div >
< div class = "line" > < a name = "l00443" > < / a > < span class = "lineno" > 443< / span >   uint64_t accumulated_clear_bytes = 0;< / div >
< div class = "line" > < a name = "l00444" > < / a > < span class = "lineno" > 444< / span >   < / div >
< div class = "line" > < a name = "l00445" > < / a > < span class = "lineno" > 445< / span >   Nalu nalu;< / div >
< div class = "line" > < a name = "l00446" > < / a > < span class = "lineno" > 446< / span >   NaluReader::Result result;< / div >
< div class = "line" > < a name = "l00447" > < / a > < span class = "lineno" > 447< / span >   < span class = "keywordflow" > while< / span > ((result = reader.Advance(& nalu)) == NaluReader::kOk) {< / div >
< div class = "line" > < a name = "l00448" > < / a > < span class = "lineno" > 448< / span >   < span class = "keyword" > const< / span > uint64_t nalu_total_size = nalu.header_size() + nalu.payload_size();< / div >
< div class = "line" > < a name = "l00449" > < / a > < span class = "lineno" > 449< / span >   < span class = "keywordflow" > if< / span > (nalu.is_video_slice() & & nalu_total_size > = min_protected_data_size_) {< / div >
< div class = "line" > < a name = "l00450" > < / a > < span class = "lineno" > 450< / span >   uint64_t current_clear_bytes = leading_clear_bytes_size_;< / div >
< div class = "line" > < a name = "l00451" > < / a > < span class = "lineno" > 451< / span >   < span class = "keywordflow" > if< / span > (current_clear_bytes == 0) {< / div >
< div class = "line" > < a name = "l00452" > < / a > < span class = "lineno" > 452< / span >   < span class = "comment" > // For video-slice NAL units, encrypt the video slice. This skips< / span > < / div >
< div class = "line" > < a name = "l00453" > < / a > < span class = "lineno" > 453< / span >   < span class = "comment" > // the frame header.< / span > < / div >
< div class = "line" > < a name = "l00454" > < / a > < span class = "lineno" > 454< / span >   < span class = "keyword" > const< / span > int64_t video_slice_header_size =< / div >
< div class = "line" > < a name = "l00455" > < / a > < span class = "lineno" > 455< / span >   header_parser_-> GetHeaderSize(nalu);< / div >
< div class = "line" > < a name = "l00456" > < / a > < span class = "lineno" > 456< / span >   < span class = "keywordflow" > if< / span > (video_slice_header_size < 0) {< / div >
< div class = "line" > < a name = "l00457" > < / a > < span class = "lineno" > 457< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Failed to read slice header." < / span > ;< / div >
< div class = "line" > < a name = "l00458" > < / a > < span class = "lineno" > 458< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00459" > < / a > < span class = "lineno" > 459< / span >   }< / div >
< div class = "line" > < a name = "l00460" > < / a > < span class = "lineno" > 460< / span >   current_clear_bytes = nalu.header_size() + video_slice_header_size;< / div >
< div class = "line" > < a name = "l00461" > < / a > < span class = "lineno" > 461< / span >   }< / div >
< div class = "line" > < a name = "l00462" > < / a > < span class = "lineno" > 462< / span >   uint64_t cipher_bytes = nalu_total_size - current_clear_bytes;< / 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 >   < span class = "comment" > // ISO/IEC 23001-7:2016 10.2 ' cbc1' 10.3 ' cens' < / span > < / div >
< div class = "line" > < a name = "l00465" > < / a > < span class = "lineno" > 465< / span >   < span class = "comment" > // The BytesOfProtectedData size SHALL be a multiple of 16 bytes to< / span > < / div >
< div class = "line" > < a name = "l00466" > < / a > < span class = "lineno" > 466< / span >   < span class = "comment" > // avoid partial blocks in Subsamples.< / span > < / div >
< div class = "line" > < a name = "l00467" > < / a > < span class = "lineno" > 467< / span >   < span class = "comment" > // CMAF requires ' cenc' scheme BytesOfProtectedData SHALL be a multiple< / span > < / div >
< div class = "line" > < a name = "l00468" > < / a > < span class = "lineno" > 468< / span >   < span class = "comment" > // of 16 bytes; while ' cbcs' scheme BytesOfProtectedData SHALL start on< / span > < / div >
< div class = "line" > < a name = "l00469" > < / a > < span class = "lineno" > 469< / span >   < span class = "comment" > // the first byte of video data following the slice header.< / span > < / div >
< div class = "line" > < a name = "l00470" > < / a > < span class = "lineno" > 470< / span >   < span class = "keywordflow" > if< / span > (encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#ac858b4c03e49e871e07e38fc35893088" > protection_scheme< / a > == FOURCC_cbc1 ||< / div >
< div class = "line" > < a name = "l00471" > < / a > < span class = "lineno" > 471< / span >   encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#ac858b4c03e49e871e07e38fc35893088" > protection_scheme< / a > == FOURCC_cens ||< / div >
< div class = "line" > < a name = "l00472" > < / a > < span class = "lineno" > 472< / span >   encryption_options_.< a class = "code" href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#ac858b4c03e49e871e07e38fc35893088" > protection_scheme< / a > == FOURCC_cenc) {< / div >
< div class = "line" > < a name = "l00473" > < / a > < span class = "lineno" > 473< / span >   < span class = "keyword" > const< / span > uint16_t misalign_bytes = cipher_bytes % kCencBlockSize;< / div >
< div class = "line" > < a name = "l00474" > < / a > < span class = "lineno" > 474< / span >   current_clear_bytes += misalign_bytes;< / div >
< div class = "line" > < a name = "l00475" > < / a > < span class = "lineno" > 475< / span >   cipher_bytes -= misalign_bytes;< / div >
< div class = "line" > < a name = "l00476" > < / a > < span class = "lineno" > 476< / span >   }< / div >
< div class = "line" > < a name = "l00477" > < / a > < span class = "lineno" > 477< / span >   < / div >
< div class = "line" > < a name = "l00478" > < / a > < span class = "lineno" > 478< / span >   < span class = "keyword" > const< / span > uint8_t* nalu_data = nalu.data() + current_clear_bytes;< / div >
< div class = "line" > < a name = "l00479" > < / a > < span class = "lineno" > 479< / span >   EncryptBytes(const_cast< uint8_t*> (nalu_data), cipher_bytes);< / div >
< div class = "line" > < a name = "l00480" > < / a > < span class = "lineno" > 480< / span >   < / div >
< div class = "line" > < a name = "l00481" > < / a > < span class = "lineno" > 481< / span >   AddSubsample(< / div >
< div class = "line" > < a name = "l00482" > < / a > < span class = "lineno" > 482< / span >   accumulated_clear_bytes + nalu_length_size_ + current_clear_bytes,< / div >
< div class = "line" > < a name = "l00483" > < / a > < span class = "lineno" > 483< / span >   cipher_bytes, decrypt_config);< / div >
< div class = "line" > < a name = "l00484" > < / a > < span class = "lineno" > 484< / span >   accumulated_clear_bytes = 0;< / div >
< div class = "line" > < a name = "l00485" > < / a > < span class = "lineno" > 485< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00486" > < / a > < span class = "lineno" > 486< / span >   < span class = "comment" > // For non-video-slice or small NAL units, don' t encrypt.< / span > < / div >
< div class = "line" > < a name = "l00487" > < / a > < span class = "lineno" > 487< / span >   accumulated_clear_bytes += nalu_length_size_ + nalu_total_size;< / div >
< div class = "line" > < a name = "l00488" > < / a > < span class = "lineno" > 488< / span >   }< / div >
< div class = "line" > < a name = "l00489" > < / a > < span class = "lineno" > 489< / span >   }< / div >
< div class = "line" > < a name = "l00490" > < / a > < span class = "lineno" > 490< / span >   < span class = "keywordflow" > if< / span > (result != NaluReader::kEOStream) {< / div >
< div class = "line" > < a name = "l00491" > < / a > < span class = "lineno" > 491< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Failed to parse NAL units." < / span > ;< / div >
< div class = "line" > < a name = "l00492" > < / a > < span class = "lineno" > 492< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00493" > < / a > < span class = "lineno" > 493< / span >   }< / div >
< div class = "line" > < a name = "l00494" > < / a > < span class = "lineno" > 494< / span >   AddSubsample(accumulated_clear_bytes, 0, decrypt_config);< / div >
< div class = "line" > < a name = "l00495" > < / a > < span class = "lineno" > 495< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00496" > < / a > < span class = "lineno" > 496< / span >   }< / div >
< div class = "line" > < a name = "l00497" > < / a > < span class = "lineno" > 497< / span >   < / div >
< div class = "line" > < a name = "l00498" > < / a > < span class = "lineno" > 498< / span >   < span class = "keywordtype" > void< / span > EncryptionHandler::EncryptBytes(uint8_t* data, < span class = "keywordtype" > size_t< / span > size) {< / div >
< div class = "line" > < a name = "l00499" > < / a > < span class = "lineno" > 499< / span >   DCHECK(encryptor_);< / div >
< div class = "line" > < a name = "l00500" > < / a > < span class = "lineno" > 500< / span >   CHECK(encryptor_-> Crypt(data, size, data));< / div >
< div class = "line" > < a name = "l00501" > < / a > < span class = "lineno" > 501< / span >   }< / div >
< div class = "line" > < a name = "l00502" > < / a > < span class = "lineno" > 502< / span >   < / div >
< div class = "line" > < a name = "l00503" > < / a > < span class = "lineno" > 503< / span >   < span class = "keywordtype" > void< / span > EncryptionHandler::InjectVpxParserForTesting(< / div >
< div class = "line" > < a name = "l00504" > < / a > < span class = "lineno" > 504< / span >   std::unique_ptr< VPxParser> vpx_parser) {< / div >
< div class = "line" > < a name = "l00505" > < / a > < span class = "lineno" > 505< / span >   vpx_parser_ = std::move(vpx_parser);< / div >
< div class = "line" > < a name = "l00506" > < / a > < span class = "lineno" > 506< / span >   }< / div >
< div class = "line" > < a name = "l00507" > < / a > < span class = "lineno" > 507< / span >   < / div >
< div class = "line" > < a name = "l00508" > < / a > < span class = "lineno" > 508< / span >   < span class = "keywordtype" > void< / span > EncryptionHandler::InjectVideoSliceHeaderParserForTesting(< / div >
< div class = "line" > < a name = "l00509" > < / a > < span class = "lineno" > 509< / span >   std::unique_ptr< VideoSliceHeaderParser> header_parser) {< / div >
< div class = "line" > < a name = "l00510" > < / a > < span class = "lineno" > 510< / span >   header_parser_ = std::move(header_parser);< / div >
< div class = "line" > < a name = "l00511" > < / a > < span class = "lineno" > 511< / span >   }< / div >
< div class = "line" > < a name = "l00512" > < / a > < span class = "lineno" > 512< / span >   < / div >
< div class = "line" > < a name = "l00513" > < / a > < span class = "lineno" > 513< / span >   } < span class = "comment" > // namespace media< / span > < / div >
< div class = "line" > < a name = "l00514" > < / a > < span class = "lineno" > 514< / span >   } < span class = "comment" > // namespace shaka< / span > < / div >
2017-06-13 22:09:24 +00:00
< div class = "ttc" id = "structshaka_1_1media_1_1EncryptionOptions_html_a586017f7bf6490e06a61c1f6eaf7970c" > < div class = "ttname" > < a href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#a586017f7bf6490e06a61c1f6eaf7970c" > shaka::media::EncryptionOptions::stream_label_func< / a > < / div > < div class = "ttdeci" > std::function< std::string(const EncryptionParams::EncryptedStreamAttributes & stream_attributes)> stream_label_func< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/dbc/encryption__handler_8h_source.html#l00038" > encryption_handler.h:38< / a > < / div > < / div >
2017-03-23 23:54:18 +00:00
< div class = "ttc" id = "classshaka_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#l00057" > stream_info.h:57< / a > < / div > < / div >
2017-06-13 22:09:24 +00:00
< div class = "ttc" id = "structshaka_1_1media_1_1EncryptionOptions_html_a2f971f63a7525a777d5578d87ef0c99f" > < div class = "ttname" > < a href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#a2f971f63a7525a777d5578d87ef0c99f" > shaka::media::EncryptionOptions::vp9_subsample_encryption< / a > < / div > < div class = "ttdeci" > bool vp9_subsample_encryption< / div > < div class = "ttdoc" > Enable/disable subsample encryption for VP9. < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/dbc/encryption__handler_8h_source.html#l00033" > encryption_handler.h:33< / a > < / div > < / div >
2017-06-15 18:19:40 +00:00
< div class = "ttc" id = "classshaka_1_1media_1_1KeySource_html_a34340247a575bc693d14c3bef9102258" > < div class = "ttname" > < a href = "../../d1/d1f/classshaka_1_1media_1_1KeySource.html#a34340247a575bc693d14c3bef9102258" > shaka::media::KeySource::GetCryptoPeriodKey< / a > < / div > < div class = "ttdeci" > virtual Status GetCryptoPeriodKey(uint32_t crypto_period_index, const std::string & stream_label, EncryptionKey *key)=0< / div > < / div >
2017-03-22 00:49:05 +00:00
< div class = "ttc" id = "classshaka_1_1media_1_1AesPatternCryptor_html_a54fd35d7782d3b4948c7eb68387711f0a09674e418b61763fdc5cf22c248efd4f" > < div class = "ttname" > < a href = "../../d3/dfe/classshaka_1_1media_1_1AesPatternCryptor.html#a54fd35d7782d3b4948c7eb68387711f0a09674e418b61763fdc5cf22c248efd4f" > shaka::media::AesPatternCryptor::kSkipIfCryptByteBlockRemaining< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d6/d09/aes__pattern__cryptor_8h_source.html#l00035" > aes_pattern_cryptor.h:35< / a > < / div > < / div >
2017-03-16 22:29:47 +00:00
< div class = "ttc" id = "classshaka_1_1media_1_1MediaHandler_html_accd62dd4def920571f95f4e1a98ab7ca" > < div class = "ttname" > < a href = "../../da/dfd/classshaka_1_1media_1_1MediaHandler.html#accd62dd4def920571f95f4e1a98ab7ca" > shaka::media::MediaHandler::Dispatch< / a > < / div > < div class = "ttdeci" > Status Dispatch(std::unique_ptr< StreamData > stream_data)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d2/de9/media__handler_8cc_source.html#l00052" > media_handler.cc:52< / a > < / div > < / div >
2017-06-12 16:24:29 +00:00
< div class = "ttc" id = "structshaka_1_1media_1_1SegmentInfo_html" > < div class = "ttname" > < a href = "../../d0/dc0/structshaka_1_1media_1_1SegmentInfo.html" > shaka::media::SegmentInfo< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d3/d93/media__handler_8h_source.html#l00035" > media_handler.h:35< / a > < / div > < / div >
2017-06-15 18:19:40 +00:00
< div class = "ttc" id = "classshaka_1_1media_1_1KeySource_html_af56c833453d65297c4dc96c9d2f83e1a" > < div class = "ttname" > < a href = "../../d1/d1f/classshaka_1_1media_1_1KeySource.html#af56c833453d65297c4dc96c9d2f83e1a" > shaka::media::KeySource::GetKey< / a > < / div > < div class = "ttdeci" > virtual Status GetKey(const std::string & stream_label, EncryptionKey *key)=0< / div > < / div >
2017-06-13 22:09:24 +00:00
< div class = "ttc" id = "structshaka_1_1media_1_1EncryptionOptions_html_a20acea0141ca7c8dd57d0129c53a6d13" > < div class = "ttname" > < a href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#a20acea0141ca7c8dd57d0129c53a6d13" > shaka::media::EncryptionOptions::crypto_period_duration_in_seconds< / a > < / div > < div class = "ttdeci" > double crypto_period_duration_in_seconds< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/dbc/encryption__handler_8h_source.html#l00031" > encryption_handler.h:31< / a > < / div > < / div >
2017-02-11 01:23:57 +00:00
< div class = "ttc" id = "classshaka_1_1media_1_1AesPatternCryptor_html_a54fd35d7782d3b4948c7eb68387711f0a76b19d202e22b2b0f661f933b47b3b16" > < div class = "ttname" > < a href = "../../d3/dfe/classshaka_1_1media_1_1AesPatternCryptor.html#a54fd35d7782d3b4948c7eb68387711f0a76b19d202e22b2b0f661f933b47b3b16" > shaka::media::AesPatternCryptor::kEncryptIfCryptByteBlockRemaining< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d6/d09/aes__pattern__cryptor_8h_source.html#l00026" > aes_pattern_cryptor.h:26< / a > < / div > < / div >
2017-06-15 18:19:40 +00:00
< div class = "ttc" id = "classshaka_1_1media_1_1EncryptionHandler_html_a3f1808a4386081e5e1c9a798a1a69dd0" > < div class = "ttname" > < a href = "../../d6/d4c/classshaka_1_1media_1_1EncryptionHandler.html#a3f1808a4386081e5e1c9a798a1a69dd0" > shaka::media::EncryptionHandler::InitializeInternal< / a > < / div > < div class = "ttdeci" > Status InitializeInternal() override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d3/d9c/encryption__handler_8cc_source.html#l00087" > encryption_handler.cc:87< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1EncryptionHandler_html_a7887e6060eb572036674ecb9a7e045c4" > < div class = "ttname" > < a href = "../../d6/d4c/classshaka_1_1media_1_1EncryptionHandler.html#a7887e6060eb572036674ecb9a7e045c4" > shaka::media::EncryptionHandler::Process< / a > < / div > < div class = "ttdeci" > Status Process(std::unique_ptr< StreamData > stream_data) override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d3/d9c/encryption__handler_8cc_source.html#l00098" > encryption_handler.cc:98< / a > < / div > < / div >
2017-02-11 01:23:57 +00:00
< div class = "ttc" id = "classshaka_1_1media_1_1AesCryptor_html_a40d9a82d274d6fbaee5346328f11dedd" > < div class = "ttname" > < a href = "../../df/d87/classshaka_1_1media_1_1AesCryptor.html#a40d9a82d274d6fbaee5346328f11dedd" > shaka::media::AesCryptor::GenerateRandomIv< / a > < / div > < div class = "ttdeci" > static bool GenerateRandomIv(FourCC protection_scheme, std::vector< uint8_t > *iv)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d6/d55/aes__cryptor_8cc_source.html#l00107" > aes_cryptor.cc:107< / a > < / div > < / div >
2017-06-13 22:09:24 +00:00
< div class = "ttc" id = "structshaka_1_1media_1_1EncryptionOptions_html_a3d58dc01a4af0ebfb56f3c4979f745f7" > < div class = "ttname" > < a href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#a3d58dc01a4af0ebfb56f3c4979f745f7" > shaka::media::EncryptionOptions::clear_lead_in_seconds< / a > < / div > < div class = "ttdeci" > double clear_lead_in_seconds< / div > < div class = "ttdoc" > Clear lead duration in seconds. < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/dbc/encryption__handler_8h_source.html#l00026" > encryption_handler.h:26< / a > < / div > < / div >
< div class = "ttc" id = "structshaka_1_1media_1_1EncryptionOptions_html_ac858b4c03e49e871e07e38fc35893088" > < div class = "ttname" > < a href = "../../d6/d82/structshaka_1_1media_1_1EncryptionOptions.html#ac858b4c03e49e871e07e38fc35893088" > shaka::media::EncryptionOptions::protection_scheme< / a > < / div > < div class = "ttdeci" > FourCC protection_scheme< / div > < div class = "ttdoc" > The protection scheme: ' cenc' , ' cens' , ' cbc1' , ' cbcs' . < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/dbc/encryption__handler_8h_source.html#l00028" > encryption_handler.h:28< / a > < / div > < / div >
2017-02-11 01:23:57 +00:00
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2017-02-11 01:23:57 +00:00
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