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< li class = "navelem" > < a class = "el" href = "../../dir_3f8eec2fc361645de4b1ec14c19fffc7.html" > packager< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_f99dae54fe7170f791f339b952d5067a.html" > media< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_64597db6ac7a9160e951a4226a03f10e.html" > codecs< / a > < / li > < / ul >
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< div class = "fragment" > < div class = "line" > < a name = "l00001" > < / a > < span class = "lineno" > 1< / span >   < span class = "comment" > // Copyright 2020 Google Inc. All rights reserved.< / span > < / div >
< div class = "line" > < a name = "l00002" > < / a > < span class = "lineno" > 2< / span >   < span class = "comment" > //< / span > < / div >
< div class = "line" > < a name = "l00003" > < / a > < span class = "lineno" > 3< / span >   < span class = "comment" > // Use of this source code is governed by a BSD-style< / span > < / div >
< div class = "line" > < a name = "l00004" > < / a > < span class = "lineno" > 4< / span >   < span class = "comment" > // license that can be found in the LICENSE file or at< / span > < / div >
< div class = "line" > < a name = "l00005" > < / a > < span class = "lineno" > 5< / span >   < span class = "comment" > // https://developers.google.com/open-source/licenses/bsd< / span > < / div >
< div class = "line" > < a name = "l00006" > < / a > < span class = "lineno" > 6< / span >   < / div >
< div class = "line" > < a name = "l00007" > < / a > < span class = "lineno" > 7< / span >   < span class = "preprocessor" > #include " packager/media/codecs/ac4_audio_util.h" < / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < span class = "preprocessor" > #include " packager/base/macros.h" < / span > < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < span class = "preprocessor" > #include " packager/base/strings/string_number_conversions.h" < / span > < / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < span class = "preprocessor" > #include " packager/media/base/bit_reader.h" < / span > < / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < span class = "preprocessor" > #include " packager/media/base/rcheck.h" < / 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 = "keyword" > namespace < / span > < a class = "code" href = "../../d8/daf/namespaceshaka.html" > shaka< / a > {< / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < span class = "keyword" > namespace < / span > media {< / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < span class = "keyword" > namespace < / span > {< / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < span class = "comment" > // Speaker group index< / span > < / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < span class = "comment" > // Bit, Location< / span > < / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < span class = "comment" > // 0(LSB), Left/Right pair< / span > < / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < span class = "comment" > // 1, Centre< / span > < / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   < span class = "comment" > // 2, Left surround/Right surround pair< / span > < / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   < span class = "comment" > // 3, Left back/Right back pair< / span > < / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   < span class = "comment" > // 4, Top front left/Top front right pair< / span > < / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   < span class = "comment" > // 5, Top back left/Top back right pair< / span > < / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < span class = "comment" > // 6, LFE< / span > < / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   < span class = "comment" > // 7, Top left/Top right pair< / span > < / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   < span class = "comment" > // 8, Top side left/Top side right pair< / span > < / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   < span class = "comment" > // 9, Top front centre< / span > < / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   < span class = "comment" > // 10, Top back centre< / span > < / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   < span class = "comment" > // 11, Top centre< / span > < / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   < span class = "comment" > // 12, LFE2< / span > < / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   < span class = "comment" > // 13, Bottom front left/Bottom front right pair< / span > < / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   < span class = "comment" > // 14, Bottom front centre< / span > < / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   < span class = "comment" > // 15, Back centre< / span > < / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   < span class = "comment" > // 16, Left screen/Right screen pair< / span > < / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   < span class = "comment" > // 17, Left wide/Right wide pair< / span > < / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   < span class = "comment" > // 18, Vertical height left/Vertical height right pair< / span > < / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   < span class = "keyword" > enum< / span > kAC4AudioChannelGroupIndex {< / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   kLRPair = 0x1,< / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   kCentre = 0x2,< / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   kLsRsPair = 0x4,< / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   kLbRbPair = 0x8,< / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   kTflTfrPair = 0x10,< / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   kTblTbrPair = 0x20,< / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   kLFE = 0x40,< / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   kTlTrPair = 0x80,< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   kTslTsrPair = 0x100,< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   kTopfrontCentre = 0x200,< / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   kTopbackCentre = 0x400,< / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   kTopCentre = 0x800,< / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   kLFE2 = 0x1000,< / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   kBflBfrPair = 0x2000,< / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   kBottomFrontCentre = 0x4000,< / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   kBackCentre = 0x8000,< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   kLscrRscrPair = 0x10000,< / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   kLwRw = 0x20000,< / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   kVhlVhrPair = 0x40000,< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   };< / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   < / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   < span class = "comment" > // Mapping of channel configurations to the MPEG audio value based on ETSI TS< / span > < / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   < span class = "comment" > // 103 192-2 V1.2.1 Digital Audio Compression (AC-4) Standard;< / span > < / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   < span class = "comment" > // Part 2: Immersive and personalized Table G.1< / span > < / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   uint32_t AC4ChannelMasktoMPEGValue(uint32_t channel_mask) {< / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   uint32_t ret = 0;< / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   < / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   < span class = "keywordflow" > switch< / span > (channel_mask) {< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < span class = "keywordflow" > case< / span > kCentre:< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   ret = 1;< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   < span class = "keywordflow" > case< / span > kLRPair:< / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   ret = 2;< / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   < span class = "keywordflow" > case< / span > kCentre | kLRPair:< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   ret = 3;< / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   < span class = "keywordflow" > case< / span > kCentre | kLRPair | kBackCentre:< / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   ret = 4;< / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   < span class = "keywordflow" > case< / span > kCentre | kLRPair | kLsRsPair:< / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   ret = 5;< / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   < span class = "keywordflow" > case< / span > kCentre | kLRPair | kLsRsPair | kLFE:< / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   ret = 6;< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   < span class = "keywordflow" > case< / span > kCentre | kLRPair | kLsRsPair | kLFE | kLwRw:< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   ret = 7;< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   < span class = "keywordflow" > case< / span > kBackCentre | kLRPair:< / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   ret = 9;< / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   < span class = "keywordflow" > case< / span > kLRPair | kLsRsPair:< / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   ret = 10;< / div >
< div class = "line" > < a name = "l00095" > < / a > < span class = "lineno" > 95< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   < span class = "keywordflow" > case< / span > kCentre | kLRPair | kLsRsPair | kLFE | kBackCentre:< / div >
< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   ret = 11;< / div >
< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   < span class = "keywordflow" > case< / span > kCentre | kLRPair | kLsRsPair | kLbRbPair | kLFE:< / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   ret = 12;< / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00102" > < / a > < span class = "lineno" > 102< / span >   < span class = "keywordflow" > case< / span > kLwRw | kBackCentre | kBottomFrontCentre | kBflBfrPair | kLFE2 |< / div >
< div class = "line" > < a name = "l00103" > < / a > < span class = "lineno" > 103< / span >   kTopCentre | kTopbackCentre | kTopfrontCentre | kTslTsrPair | kLFE |< / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   kTblTbrPair | kTflTfrPair | kLbRbPair | kLsRsPair | kCentre | kLRPair:< / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   < span class = "keywordflow" > case< / span > kVhlVhrPair | kLwRw | kBackCentre | kBottomFrontCentre | kBflBfrPair|< / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   kLFE2 | kTopCentre | kTopbackCentre | kTopfrontCentre | kTslTsrPair |< / div >
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   kLFE | kTblTbrPair | kLbRbPair | kLsRsPair | kCentre | kLRPair:< / div >
< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > 108< / span >   ret = 13;< / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   < span class = "keywordflow" > case< / span > kLFE | kTflTfrPair | kLsRsPair | kCentre | kLRPair:< / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   < span class = "keywordflow" > case< / span > kVhlVhrPair | kLFE | kCentre | kLRPair | kLsRsPair:< / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   ret = 14;< / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   < span class = "keywordflow" > case< / span > kLFE2 | kTopbackCentre | kLFE | kTflTfrPair | kCentre | kLRPair |< / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   kLsRsPair | kLbRbPair:< / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   < span class = "keywordflow" > case< / span > kVhlVhrPair | kLFE2 | kTopbackCentre | kLFE | kCentre | kLRPair |< / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   kLsRsPair | kLbRbPair:< / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   ret = 15;< / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > 119< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   < span class = "keywordflow" > case< / span > kLFE | kTblTbrPair | kTflTfrPair | kLsRsPair | kCentre | kLRPair:< / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   < span class = "keywordflow" > case< / span > kVhlVhrPair | kLFE | kTblTbrPair | kLsRsPair | kCentre | kLRPair:< / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   ret = 16;< / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   < span class = "keywordflow" > case< / span > kTopCentre | kTopfrontCentre | kLFE | kTblTbrPair | kTflTfrPair |< / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > 125< / span >   kLsRsPair | kCentre | kLRPair:< / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   < span class = "keywordflow" > case< / span > kVhlVhrPair | kTopCentre | kTopfrontCentre | kLFE | kTblTbrPair |< / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   kLsRsPair | kCentre | kLRPair:< / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > 128< / span >   ret = 17;< / div >
< div class = "line" > < a name = "l00129" > < / a > < span class = "lineno" > 129< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00130" > < / a > < span class = "lineno" > 130< / span >   < span class = "keywordflow" > case< / span > kTopCentre | kTopfrontCentre | kLFE | kTblTbrPair | kTflTfrPair |< / div >
< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > 131< / span >   kCentre | kLRPair | kLsRsPair | kLbRbPair:< / div >
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   < span class = "keywordflow" > case< / span > kVhlVhrPair | kTopCentre | kTopfrontCentre | kLFE | kTblTbrPair |< / div >
< div class = "line" > < a name = "l00133" > < / a > < span class = "lineno" > 133< / span >   kCentre | kLRPair | kLsRsPair | kLbRbPair:< / div >
< div class = "line" > < a name = "l00134" > < / a > < span class = "lineno" > 134< / span >   ret = 18;< / div >
< div class = "line" > < a name = "l00135" > < / a > < span class = "lineno" > 135< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00136" > < / a > < span class = "lineno" > 136< / span >   < span class = "keywordflow" > case< / span > kLFE | kTblTbrPair | kTflTfrPair | kCentre | kLRPair | kLsRsPair |< / div >
< div class = "line" > < a name = "l00137" > < / a > < span class = "lineno" > 137< / span >   kLbRbPair:< / div >
< div class = "line" > < a name = "l00138" > < / a > < span class = "lineno" > 138< / span >   < span class = "keywordflow" > case< / span > kVhlVhrPair | kLFE | kTblTbrPair | kCentre | kLRPair | kLsRsPair |< / div >
< div class = "line" > < a name = "l00139" > < / a > < span class = "lineno" > 139< / span >   kLbRbPair:< / div >
< div class = "line" > < a name = "l00140" > < / a > < span class = "lineno" > 140< / span >   ret = 19;< / div >
< div class = "line" > < a name = "l00141" > < / a > < span class = "lineno" > 141< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00142" > < / a > < span class = "lineno" > 142< / span >   < span class = "keywordflow" > case< / span > kLscrRscrPair | kLFE | kTblTbrPair | kTflTfrPair | kCentre | kLRPair |< / div >
< div class = "line" > < a name = "l00143" > < / a > < span class = "lineno" > 143< / span >   kLsRsPair | kLbRbPair:< / div >
< div class = "line" > < a name = "l00144" > < / a > < span class = "lineno" > 144< / span >   < span class = "keywordflow" > case< / span > kVhlVhrPair | kLscrRscrPair | kLFE | kTblTbrPair | kCentre | kLRPair |< / div >
< div class = "line" > < a name = "l00145" > < / a > < span class = "lineno" > 145< / span >   kLsRsPair | kLbRbPair:< / div >
< div class = "line" > < a name = "l00146" > < / a > < span class = "lineno" > 146< / span >   ret = 20;< / div >
< div class = "line" > < a name = "l00147" > < / a > < span class = "lineno" > 147< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00148" > < / a > < span class = "lineno" > 148< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00149" > < / a > < span class = "lineno" > 149< / span >   ret = 0xFFFFFFFF;< / div >
< div class = "line" > < a name = "l00150" > < / a > < span class = "lineno" > 150< / span >   }< / div >
< div class = "line" > < a name = "l00151" > < / a > < span class = "lineno" > 151< / span >   < span class = "keywordflow" > return< / span > ret;< / div >
< div class = "line" > < a name = "l00152" > < / a > < span class = "lineno" > 152< / span >   }< / div >
< div class = "line" > < a name = "l00153" > < / a > < span class = "lineno" > 153< / span >   < / div >
< div class = "line" > < a name = "l00154" > < / a > < span class = "lineno" > 154< / span >   < span class = "comment" > // Parse AC-4 substream group based on ETSI TS 103 192-2 V1.2.1 Digital Audio< / span > < / div >
< div class = "line" > < a name = "l00155" > < / a > < span class = "lineno" > 155< / span >   < span class = "comment" > // Compression (AC-4) Standard; Part 2: Immersive and personalized E.11.< / span > < / div >
< div class = "line" > < a name = "l00156" > < / a > < span class = "lineno" > 156< / span >   < span class = "keywordtype" > bool< / span > ParseAC4SubStreamGroupDsi(BitReader& bit_reader) {< / div >
< div class = "line" > < a name = "l00157" > < / a > < span class = "lineno" > 157< / span >   < span class = "keywordtype" > bool< / span > b_substream_present;< / div >
< div class = "line" > < a name = "l00158" > < / a > < span class = "lineno" > 158< / span >   RCHECK(bit_reader.ReadBits(1, & b_substream_present));< / div >
< div class = "line" > < a name = "l00159" > < / a > < span class = "lineno" > 159< / span >   < span class = "keywordtype" > bool< / span > b_hsf_ext;< / div >
< div class = "line" > < a name = "l00160" > < / a > < span class = "lineno" > 160< / span >   RCHECK(bit_reader.ReadBits(1, & b_hsf_ext));< / div >
< div class = "line" > < a name = "l00161" > < / a > < span class = "lineno" > 161< / span >   < span class = "keywordtype" > bool< / span > b_channel_coded;< / div >
< div class = "line" > < a name = "l00162" > < / a > < span class = "lineno" > 162< / span >   RCHECK(bit_reader.ReadBits(1, & b_channel_coded));< / div >
< div class = "line" > < a name = "l00163" > < / a > < span class = "lineno" > 163< / span >   uint8_t n_substreams;< / div >
< div class = "line" > < a name = "l00164" > < / a > < span class = "lineno" > 164< / span >   RCHECK(bit_reader.ReadBits(8, & n_substreams));< / div >
< div class = "line" > < a name = "l00165" > < / a > < span class = "lineno" > 165< / span >   < span class = "keywordflow" > for< / span > (uint8_t i = 0; i < n_substreams; i++) {< / div >
< div class = "line" > < a name = "l00166" > < / a > < span class = "lineno" > 166< / span >   RCHECK(bit_reader.SkipBits(2));< / div >
< div class = "line" > < a name = "l00167" > < / a > < span class = "lineno" > 167< / span >   < span class = "keywordtype" > bool< / span > b_substream_bitrate_indicator;< / div >
< div class = "line" > < a name = "l00168" > < / a > < span class = "lineno" > 168< / span >   RCHECK(bit_reader.ReadBits(1, & b_substream_bitrate_indicator));< / div >
< div class = "line" > < a name = "l00169" > < / a > < span class = "lineno" > 169< / span >   < span class = "keywordflow" > if< / span > (b_substream_bitrate_indicator) {< / div >
< div class = "line" > < a name = "l00170" > < / a > < span class = "lineno" > 170< / span >   RCHECK(bit_reader.SkipBits(5));< / div >
< div class = "line" > < a name = "l00171" > < / a > < span class = "lineno" > 171< / span >   }< / div >
< div class = "line" > < a name = "l00172" > < / a > < span class = "lineno" > 172< / span >   < span class = "keywordflow" > if< / span > (b_channel_coded) {< / div >
< div class = "line" > < a name = "l00173" > < / a > < span class = "lineno" > 173< / span >   RCHECK(bit_reader.SkipBits(24));< / div >
< div class = "line" > < a name = "l00174" > < / a > < span class = "lineno" > 174< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00175" > < / a > < span class = "lineno" > 175< / span >   < span class = "keywordtype" > bool< / span > b_ajoc;< / div >
< div class = "line" > < a name = "l00176" > < / a > < span class = "lineno" > 176< / span >   RCHECK(bit_reader.ReadBits(1, & b_ajoc));< / div >
< div class = "line" > < a name = "l00177" > < / a > < span class = "lineno" > 177< / span >   < span class = "keywordflow" > if< / span > (b_ajoc) {< / div >
< div class = "line" > < a name = "l00178" > < / a > < span class = "lineno" > 178< / span >   < span class = "keywordtype" > bool< / span > b_static_dmx;< / div >
< div class = "line" > < a name = "l00179" > < / a > < span class = "lineno" > 179< / span >   RCHECK(bit_reader.ReadBits(1, & b_static_dmx));< / div >
< div class = "line" > < a name = "l00180" > < / a > < span class = "lineno" > 180< / span >   < span class = "keywordflow" > if< / span > (!b_static_dmx) {< / div >
< div class = "line" > < a name = "l00181" > < / a > < span class = "lineno" > 181< / span >   RCHECK(bit_reader.SkipBits(4));< / div >
< div class = "line" > < a name = "l00182" > < / a > < span class = "lineno" > 182< / span >   }< / div >
< div class = "line" > < a name = "l00183" > < / a > < span class = "lineno" > 183< / span >   RCHECK(bit_reader.SkipBits(6));< / div >
< div class = "line" > < a name = "l00184" > < / a > < span class = "lineno" > 184< / span >   }< / div >
< div class = "line" > < a name = "l00185" > < / a > < span class = "lineno" > 185< / span >   RCHECK(bit_reader.SkipBits(4));< / div >
< div class = "line" > < a name = "l00186" > < / a > < span class = "lineno" > 186< / span >   }< / div >
< div class = "line" > < a name = "l00187" > < / a > < span class = "lineno" > 187< / span >   }< / div >
< div class = "line" > < a name = "l00188" > < / a > < span class = "lineno" > 188< / span >   < span class = "keywordtype" > bool< / span > b_content_type;< / div >
< div class = "line" > < a name = "l00189" > < / a > < span class = "lineno" > 189< / span >   RCHECK(bit_reader.ReadBits(1, & b_content_type));< / div >
< div class = "line" > < a name = "l00190" > < / a > < span class = "lineno" > 190< / span >   < span class = "keywordflow" > if< / span > (b_content_type) {< / div >
< div class = "line" > < a name = "l00191" > < / a > < span class = "lineno" > 191< / span >   RCHECK(bit_reader.SkipBits(3));< / div >
< div class = "line" > < a name = "l00192" > < / a > < span class = "lineno" > 192< / span >   < span class = "keywordtype" > bool< / span > b_language_indicator;< / div >
< div class = "line" > < a name = "l00193" > < / a > < span class = "lineno" > 193< / span >   RCHECK(bit_reader.ReadBits(1, & b_language_indicator));< / div >
< div class = "line" > < a name = "l00194" > < / a > < span class = "lineno" > 194< / span >   < span class = "keywordflow" > if< / span > (b_language_indicator) {< / div >
< div class = "line" > < a name = "l00195" > < / a > < span class = "lineno" > 195< / span >   uint8_t n_language_tag_bytes;< / div >
< div class = "line" > < a name = "l00196" > < / a > < span class = "lineno" > 196< / span >   RCHECK(bit_reader.ReadBits(6, & n_language_tag_bytes));< / div >
< div class = "line" > < a name = "l00197" > < / a > < span class = "lineno" > 197< / span >   RCHECK(bit_reader.SkipBits(n_language_tag_bytes * 8));< / div >
< div class = "line" > < a name = "l00198" > < / a > < span class = "lineno" > 198< / span >   }< / div >
< div class = "line" > < a name = "l00199" > < / a > < span class = "lineno" > 199< / span >   }< / div >
< div class = "line" > < a name = "l00200" > < / a > < span class = "lineno" > 200< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00201" > < / a > < span class = "lineno" > 201< / span >   }< / div >
< div class = "line" > < a name = "l00202" > < / a > < span class = "lineno" > 202< / span >   < / div >
< div class = "line" > < a name = "l00203" > < / a > < span class = "lineno" > 203< / span >   < span class = "comment" > // Parse AC-4 Presentation V1 based on ETSI TS 103 192-2 V1.2.1 Digital Audio< / span > < / div >
< div class = "line" > < a name = "l00204" > < / a > < span class = "lineno" > 204< / span >   < span class = "comment" > // Compression (AC-4) Standard;Part 2: Immersive and personalized E.10.< / span > < / div >
< div class = "line" > < a name = "l00205" > < / a > < span class = "lineno" > 205< / span >   < span class = "keywordtype" > bool< / span > ParseAC4PresentationV1Dsi(BitReader& bit_reader,< / div >
< div class = "line" > < a name = "l00206" > < / a > < span class = "lineno" > 206< / span >   uint32_t pres_bytes,< / div >
< div class = "line" > < a name = "l00207" > < / a > < span class = "lineno" > 207< / span >   uint8_t* mdcompat,< / div >
< div class = "line" > < a name = "l00208" > < / a > < span class = "lineno" > 208< / span >   uint32_t* presentation_channel_mask_v1,< / div >
< div class = "line" > < a name = "l00209" > < / a > < span class = "lineno" > 209< / span >   < span class = "keywordtype" > bool< / span > * dolby_cbi_indicator,< / div >
< div class = "line" > < a name = "l00210" > < / a > < span class = "lineno" > 210< / span >   uint8_t* dolby_atmos_indicator) {< / div >
< div class = "line" > < a name = "l00211" > < / a > < span class = "lineno" > 211< / span >   < span class = "keywordtype" > bool< / span > ret = < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00212" > < / a > < span class = "lineno" > 212< / span >   < span class = "comment" > // Record the initial offset.< / span > < / div >
< div class = "line" > < a name = "l00213" > < / a > < span class = "lineno" > 213< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > presentation_start = bit_reader.bit_position();< / div >
< div class = "line" > < a name = "l00214" > < / a > < span class = "lineno" > 214< / span >   uint8_t presentation_config_v1;< / div >
< div class = "line" > < a name = "l00215" > < / a > < span class = "lineno" > 215< / span >   RCHECK(bit_reader.ReadBits(5, & presentation_config_v1));< / div >
< div class = "line" > < a name = "l00216" > < / a > < span class = "lineno" > 216< / span >   uint8_t b_add_emdf_substreams;< / div >
< div class = "line" > < a name = "l00217" > < / a > < span class = "lineno" > 217< / span >   < span class = "comment" > // set default value (stereo content) for output parameters.< / span > < / div >
< div class = "line" > < a name = "l00218" > < / a > < span class = "lineno" > 218< / span >   *mdcompat = 0;< / div >
< div class = "line" > < a name = "l00219" > < / a > < span class = "lineno" > 219< / span >   *presentation_channel_mask_v1 = 2;< / div >
< div class = "line" > < a name = "l00220" > < / a > < span class = "lineno" > 220< / span >   *dolby_cbi_indicator = < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00221" > < / a > < span class = "lineno" > 221< / span >   *dolby_atmos_indicator = 0;< / div >
< div class = "line" > < a name = "l00222" > < / a > < span class = "lineno" > 222< / span >   < span class = "keywordflow" > if< / span > (presentation_config_v1 == 0x06) {< / div >
< div class = "line" > < a name = "l00223" > < / a > < span class = "lineno" > 223< / span >   b_add_emdf_substreams = 1;< / div >
< div class = "line" > < a name = "l00224" > < / a > < span class = "lineno" > 224< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00225" > < / a > < span class = "lineno" > 225< / span >   RCHECK(bit_reader.ReadBits(3, mdcompat));< / div >
< div class = "line" > < a name = "l00226" > < / a > < span class = "lineno" > 226< / span >   < span class = "keywordtype" > bool< / span > b_presentation_id;< / div >
< div class = "line" > < a name = "l00227" > < / a > < span class = "lineno" > 227< / span >   RCHECK(bit_reader.ReadBits(1, & b_presentation_id));< / div >
< div class = "line" > < a name = "l00228" > < / a > < span class = "lineno" > 228< / span >   < span class = "keywordflow" > if< / span > (b_presentation_id) {< / div >
< div class = "line" > < a name = "l00229" > < / a > < span class = "lineno" > 229< / span >   RCHECK(bit_reader.SkipBits(5));< / div >
< div class = "line" > < a name = "l00230" > < / a > < span class = "lineno" > 230< / span >   }< / div >
< div class = "line" > < a name = "l00231" > < / a > < span class = "lineno" > 231< / span >   RCHECK(bit_reader.SkipBits(19));< / div >
< div class = "line" > < a name = "l00232" > < / a > < span class = "lineno" > 232< / span >   < span class = "keywordtype" > bool< / span > b_presentation_channel_coded;< / div >
< div class = "line" > < a name = "l00233" > < / a > < span class = "lineno" > 233< / span >   RCHECK(bit_reader.ReadBits(1, & b_presentation_channel_coded));< / div >
< div class = "line" > < a name = "l00234" > < / a > < span class = "lineno" > 234< / span >   *presentation_channel_mask_v1 = 0;< / div >
< div class = "line" > < a name = "l00235" > < / a > < span class = "lineno" > 235< / span >   < span class = "keywordflow" > if< / span > (b_presentation_channel_coded) {< / div >
< div class = "line" > < a name = "l00236" > < / a > < span class = "lineno" > 236< / span >   uint8_t dsi_presentation_ch_mode;< / div >
< div class = "line" > < a name = "l00237" > < / a > < span class = "lineno" > 237< / span >   RCHECK(bit_reader.ReadBits(5, & dsi_presentation_ch_mode));< / div >
< div class = "line" > < a name = "l00238" > < / a > < span class = "lineno" > 238< / span >   < span class = "keywordflow" > if< / span > (dsi_presentation_ch_mode > = 11 & & dsi_presentation_ch_mode < = 14) {< / div >
< div class = "line" > < a name = "l00239" > < / a > < span class = "lineno" > 239< / span >   RCHECK(bit_reader.SkipBits(1));< / div >
< div class = "line" > < a name = "l00240" > < / a > < span class = "lineno" > 240< / span >   uint8_t pres_top_channel_pairs;< / div >
< div class = "line" > < a name = "l00241" > < / a > < span class = "lineno" > 241< / span >   RCHECK(bit_reader.ReadBits(2, & pres_top_channel_pairs));< / div >
< div class = "line" > < a name = "l00242" > < / a > < span class = "lineno" > 242< / span >   < span class = "keywordflow" > if< / span > (pres_top_channel_pairs) {< / div >
< div class = "line" > < a name = "l00243" > < / a > < span class = "lineno" > 243< / span >   *dolby_cbi_indicator = < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00244" > < / a > < span class = "lineno" > 244< / span >   }< / div >
< div class = "line" > < a name = "l00245" > < / a > < span class = "lineno" > 245< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (dsi_presentation_ch_mode == 15) {< / div >
< div class = "line" > < a name = "l00246" > < / a > < span class = "lineno" > 246< / span >   *dolby_cbi_indicator = < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00247" > < / a > < span class = "lineno" > 247< / span >   }< / div >
< div class = "line" > < a name = "l00248" > < / a > < span class = "lineno" > 248< / span >   RCHECK(bit_reader.ReadBits(24, presentation_channel_mask_v1));< / 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 = "keywordtype" > bool< / span > b_presentation_core_differs;< / div >
< div class = "line" > < a name = "l00251" > < / a > < span class = "lineno" > 251< / span >   RCHECK(bit_reader.ReadBits(1, & b_presentation_core_differs));< / div >
< div class = "line" > < a name = "l00252" > < / a > < span class = "lineno" > 252< / span >   < span class = "keywordflow" > if< / span > (b_presentation_core_differs) {< / div >
< div class = "line" > < a name = "l00253" > < / a > < span class = "lineno" > 253< / span >   < span class = "keywordtype" > bool< / span > b_presentation_core_channel_coded;< / div >
< div class = "line" > < a name = "l00254" > < / a > < span class = "lineno" > 254< / span >   RCHECK(bit_reader.ReadBits(1, & b_presentation_core_channel_coded));< / div >
< div class = "line" > < a name = "l00255" > < / a > < span class = "lineno" > 255< / span >   < span class = "keywordflow" > if< / span > (b_presentation_core_channel_coded) {< / div >
< div class = "line" > < a name = "l00256" > < / a > < span class = "lineno" > 256< / span >   RCHECK(bit_reader.SkipBits(2));< / div >
< div class = "line" > < a name = "l00257" > < / a > < span class = "lineno" > 257< / span >   }< / div >
< div class = "line" > < a name = "l00258" > < / a > < span class = "lineno" > 258< / span >   }< / div >
< div class = "line" > < a name = "l00259" > < / a > < span class = "lineno" > 259< / span >   < span class = "keywordtype" > bool< / span > b_presentation_filter;< / div >
< div class = "line" > < a name = "l00260" > < / a > < span class = "lineno" > 260< / span >   RCHECK(bit_reader.ReadBits(1, & b_presentation_filter));< / div >
< div class = "line" > < a name = "l00261" > < / a > < span class = "lineno" > 261< / span >   < span class = "keywordflow" > if< / span > (b_presentation_filter) {< / div >
< div class = "line" > < a name = "l00262" > < / a > < span class = "lineno" > 262< / span >   RCHECK(bit_reader.SkipBits(1));< / div >
< div class = "line" > < a name = "l00263" > < / a > < span class = "lineno" > 263< / span >   uint8_t n_filter_bytes;< / div >
< div class = "line" > < a name = "l00264" > < / a > < span class = "lineno" > 264< / span >   RCHECK(bit_reader.ReadBits(8, & n_filter_bytes));< / div >
< div class = "line" > < a name = "l00265" > < / a > < span class = "lineno" > 265< / span >   RCHECK(bit_reader.SkipBits(n_filter_bytes * 8));< / div >
< div class = "line" > < a name = "l00266" > < / a > < span class = "lineno" > 266< / span >   }< / div >
< div class = "line" > < a name = "l00267" > < / a > < span class = "lineno" > 267< / span >   < span class = "keywordflow" > if< / span > (presentation_config_v1 == 0x1f) {< / div >
< div class = "line" > < a name = "l00268" > < / a > < span class = "lineno" > 268< / span >   ret & = ParseAC4SubStreamGroupDsi(bit_reader);< / div >
< div class = "line" > < a name = "l00269" > < / a > < span class = "lineno" > 269< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00270" > < / a > < span class = "lineno" > 270< / span >   RCHECK(bit_reader.SkipBits(1));< / div >
< div class = "line" > < a name = "l00271" > < / a > < span class = "lineno" > 271< / span >   < span class = "keywordflow" > if< / span > (presentation_config_v1 == 0 ||< / div >
< div class = "line" > < a name = "l00272" > < / a > < span class = "lineno" > 272< / span >   presentation_config_v1 == 1 ||< / div >
< div class = "line" > < a name = "l00273" > < / a > < span class = "lineno" > 273< / span >   presentation_config_v1 == 2) {< / div >
< div class = "line" > < a name = "l00274" > < / a > < span class = "lineno" > 274< / span >   ret & = ParseAC4SubStreamGroupDsi(bit_reader);< / div >
< div class = "line" > < a name = "l00275" > < / a > < span class = "lineno" > 275< / span >   ret & = ParseAC4SubStreamGroupDsi(bit_reader);< / div >
< div class = "line" > < a name = "l00276" > < / a > < span class = "lineno" > 276< / span >   }< / div >
< div class = "line" > < a name = "l00277" > < / a > < span class = "lineno" > 277< / span >   < span class = "keywordflow" > if< / span > (presentation_config_v1 == 3 || presentation_config_v1 == 4) {< / div >
< div class = "line" > < a name = "l00278" > < / a > < span class = "lineno" > 278< / span >   ret & = ParseAC4SubStreamGroupDsi(bit_reader);< / div >
< div class = "line" > < a name = "l00279" > < / a > < span class = "lineno" > 279< / span >   ret & = ParseAC4SubStreamGroupDsi(bit_reader);< / div >
< div class = "line" > < a name = "l00280" > < / a > < span class = "lineno" > 280< / span >   ret & = ParseAC4SubStreamGroupDsi(bit_reader);< / div >
< div class = "line" > < a name = "l00281" > < / a > < span class = "lineno" > 281< / span >   }< / div >
< div class = "line" > < a name = "l00282" > < / a > < span class = "lineno" > 282< / span >   < span class = "keywordflow" > if< / span > (presentation_config_v1 == 5) {< / div >
< div class = "line" > < a name = "l00283" > < / a > < span class = "lineno" > 283< / span >   uint8_t n_substream_groups_minus2;< / div >
< div class = "line" > < a name = "l00284" > < / a > < span class = "lineno" > 284< / span >   RCHECK(bit_reader.ReadBits(3, & n_substream_groups_minus2));< / div >
< div class = "line" > < a name = "l00285" > < / a > < span class = "lineno" > 285< / span >   < span class = "keywordflow" > for< / span > (uint8_t sg = 0; sg < n_substream_groups_minus2 + 2; sg++) {< / div >
< div class = "line" > < a name = "l00286" > < / a > < span class = "lineno" > 286< / span >   ret & = ParseAC4SubStreamGroupDsi(bit_reader);< / div >
< div class = "line" > < a name = "l00287" > < / a > < span class = "lineno" > 287< / span >   }< / div >
< div class = "line" > < a name = "l00288" > < / a > < span class = "lineno" > 288< / span >   }< / div >
< div class = "line" > < a name = "l00289" > < / a > < span class = "lineno" > 289< / span >   < span class = "keywordflow" > if< / span > (presentation_config_v1 > 5) {< / div >
< div class = "line" > < a name = "l00290" > < / a > < span class = "lineno" > 290< / span >   uint8_t n_skip_bytes;< / div >
< div class = "line" > < a name = "l00291" > < / a > < span class = "lineno" > 291< / span >   RCHECK(bit_reader.ReadBits(7, & n_skip_bytes));< / div >
< div class = "line" > < a name = "l00292" > < / a > < span class = "lineno" > 292< / span >   RCHECK(bit_reader.SkipBits(n_skip_bytes * 8));< / 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 >   }< / div >
< div class = "line" > < a name = "l00295" > < / a > < span class = "lineno" > 295< / span >   RCHECK(bit_reader.SkipBits(1));< / div >
< div class = "line" > < a name = "l00296" > < / a > < span class = "lineno" > 296< / span >   RCHECK(bit_reader.ReadBits(1, & b_add_emdf_substreams));< / div >
< div class = "line" > < a name = "l00297" > < / a > < span class = "lineno" > 297< / span >   }< / div >
< div class = "line" > < a name = "l00298" > < / a > < span class = "lineno" > 298< / span >   < span class = "keywordflow" > if< / span > (b_add_emdf_substreams) {< / div >
< div class = "line" > < a name = "l00299" > < / a > < span class = "lineno" > 299< / span >   uint8_t n_add_emdf_substreams;< / div >
< div class = "line" > < a name = "l00300" > < / a > < span class = "lineno" > 300< / span >   RCHECK(bit_reader.ReadBits(7, & n_add_emdf_substreams));< / div >
< div class = "line" > < a name = "l00301" > < / a > < span class = "lineno" > 301< / span >   RCHECK(bit_reader.SkipBits(n_add_emdf_substreams * 15));< / div >
< div class = "line" > < a name = "l00302" > < / a > < span class = "lineno" > 302< / span >   }< / div >
< div class = "line" > < a name = "l00303" > < / a > < span class = "lineno" > 303< / span >   < span class = "keywordtype" > bool< / span > b_presentation_bitrate_info;< / div >
< div class = "line" > < a name = "l00304" > < / a > < span class = "lineno" > 304< / span >   RCHECK(bit_reader.ReadBits(1, & b_presentation_bitrate_info));< / div >
< div class = "line" > < a name = "l00305" > < / a > < span class = "lineno" > 305< / span >   < span class = "keywordflow" > if< / span > (b_presentation_bitrate_info) {< / div >
< div class = "line" > < a name = "l00306" > < / a > < span class = "lineno" > 306< / span >   < span class = "comment" > // Skip bit rate information based on ETSI TS 103 190-2 v1.2.1 E.7.1< / span > < / div >
< div class = "line" > < a name = "l00307" > < / a > < span class = "lineno" > 307< / span >   RCHECK(bit_reader.SkipBits(66));< / div >
< div class = "line" > < a name = "l00308" > < / a > < span class = "lineno" > 308< / span >   }< / div >
< div class = "line" > < a name = "l00309" > < / a > < span class = "lineno" > 309< / span >   < span class = "keywordtype" > bool< / span > b_alternative;< / div >
< div class = "line" > < a name = "l00310" > < / a > < span class = "lineno" > 310< / span >   RCHECK(bit_reader.ReadBits(1, & b_alternative));< / div >
< div class = "line" > < a name = "l00311" > < / a > < span class = "lineno" > 311< / span >   < span class = "keywordflow" > if< / span > (b_alternative) {< / div >
< div class = "line" > < a name = "l00312" > < / a > < span class = "lineno" > 312< / span >   bit_reader.SkipToNextByte();< / div >
< div class = "line" > < a name = "l00313" > < / a > < span class = "lineno" > 313< / span >   < span class = "comment" > // Parse alternative information based on ETSI TS 103 190-2 v1.2.1 E.12< / span > < / div >
< div class = "line" > < a name = "l00314" > < / a > < span class = "lineno" > 314< / span >   uint16_t name_len;< / div >
< div class = "line" > < a name = "l00315" > < / a > < span class = "lineno" > 315< / span >   RCHECK(bit_reader.ReadBits(16, & name_len));< / div >
< div class = "line" > < a name = "l00316" > < / a > < span class = "lineno" > 316< / span >   RCHECK(bit_reader.SkipBits(name_len * 8));< / div >
< div class = "line" > < a name = "l00317" > < / a > < span class = "lineno" > 317< / span >   uint8_t n_targets;< / div >
< div class = "line" > < a name = "l00318" > < / a > < span class = "lineno" > 318< / span >   RCHECK(bit_reader.ReadBits(5, & n_targets));< / div >
< div class = "line" > < a name = "l00319" > < / a > < span class = "lineno" > 319< / span >   RCHECK(bit_reader.SkipBits(n_targets * 11));< / 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 >   bit_reader.SkipToNextByte();< / div >
< div class = "line" > < a name = "l00322" > < / a > < span class = "lineno" > 322< / span >   < span class = "keywordflow" > if< / span > ((bit_reader.bit_position() - presentation_start) < =< / div >
< div class = "line" > < a name = "l00323" > < / a > < span class = "lineno" > 323< / span >   (pres_bytes - 1) * 8) {< / div >
< div class = "line" > < a name = "l00324" > < / a > < span class = "lineno" > 324< / span >   RCHECK(bit_reader.SkipBits(1));< / div >
< div class = "line" > < a name = "l00325" > < / a > < span class = "lineno" > 325< / span >   RCHECK(bit_reader.ReadBits(1, dolby_atmos_indicator));< / div >
< div class = "line" > < a name = "l00326" > < / a > < span class = "lineno" > 326< / span >   RCHECK(bit_reader.SkipBits(4));< / div >
< div class = "line" > < a name = "l00327" > < / a > < span class = "lineno" > 327< / span >   < span class = "keywordtype" > bool< / span > b_extended_presentation_group_index;< / div >
< div class = "line" > < a name = "l00328" > < / a > < span class = "lineno" > 328< / span >   RCHECK(bit_reader.ReadBits(1, & b_extended_presentation_group_index));< / div >
< div class = "line" > < a name = "l00329" > < / a > < span class = "lineno" > 329< / span >   < span class = "keywordflow" > if< / span > (b_extended_presentation_group_index) {< / div >
< div class = "line" > < a name = "l00330" > < / a > < span class = "lineno" > 330< / span >   RCHECK(bit_reader.SkipBits(9));< / div >
< div class = "line" > < a name = "l00331" > < / a > < span class = "lineno" > 331< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00332" > < / a > < span class = "lineno" > 332< / span >   RCHECK(bit_reader.SkipBits(1));< / div >
< div class = "line" > < a name = "l00333" > < / a > < span class = "lineno" > 333< / span >   }< / div >
< div class = "line" > < a name = "l00334" > < / a > < span class = "lineno" > 334< / span >   }< / div >
< div class = "line" > < a name = "l00335" > < / a > < span class = "lineno" > 335< / span >   < span class = "keywordflow" > return< / span > ret;< / div >
< div class = "line" > < a name = "l00336" > < / a > < span class = "lineno" > 336< / span >   }< / div >
< div class = "line" > < a name = "l00337" > < / a > < span class = "lineno" > 337< / span >   < / div >
< div class = "line" > < a name = "l00338" > < / a > < span class = "lineno" > 338< / span >   < span class = "keywordtype" > bool< / span > ExtractAc4Data(< span class = "keyword" > const< / span > std::vector< uint8_t> & ac4_data,< / div >
< div class = "line" > < a name = "l00339" > < / a > < span class = "lineno" > 339< / span >   uint8_t* bitstream_version,< / div >
< div class = "line" > < a name = "l00340" > < / a > < span class = "lineno" > 340< / span >   uint8_t* presentation_version,< / div >
< div class = "line" > < a name = "l00341" > < / a > < span class = "lineno" > 341< / span >   uint8_t* mdcompat,< / div >
< div class = "line" > < a name = "l00342" > < / a > < span class = "lineno" > 342< / span >   uint32_t* presentation_channel_mask_v1,< / div >
< div class = "line" > < a name = "l00343" > < / a > < span class = "lineno" > 343< / span >   < span class = "keywordtype" > bool< / span > * dolby_ims_indicator,< / div >
< div class = "line" > < a name = "l00344" > < / a > < span class = "lineno" > 344< / span >   < span class = "keywordtype" > bool< / span > * dolby_cbi_indicator) {< / div >
< div class = "line" > < a name = "l00345" > < / a > < span class = "lineno" > 345< / span >   BitReader bit_reader(ac4_data.data(), ac4_data.size());< / div >
< div class = "line" > < a name = "l00346" > < / a > < span class = "lineno" > 346< / span >   < / div >
< div class = "line" > < a name = "l00347" > < / a > < span class = "lineno" > 347< / span >   uint16_t n_presentation;< / div >
< div class = "line" > < a name = "l00348" > < / a > < span class = "lineno" > 348< / span >   RCHECK(bit_reader.SkipBits(3) & & bit_reader.ReadBits(7, bitstream_version));< / div >
< div class = "line" > < a name = "l00349" > < / a > < span class = "lineno" > 349< / span >   RCHECK(bit_reader.SkipBits(5) & & bit_reader.ReadBits(9, & n_presentation));< / div >
< div class = "line" > < a name = "l00350" > < / a > < span class = "lineno" > 350< / span >   < / div >
< div class = "line" > < a name = "l00351" > < / a > < span class = "lineno" > 351< / span >   < span class = "keywordflow" > if< / span > (*bitstream_version == 2) {< / div >
< div class = "line" > < a name = "l00352" > < / a > < span class = "lineno" > 352< / span >   uint8_t b_program_id = 0;< / div >
< div class = "line" > < a name = "l00353" > < / a > < span class = "lineno" > 353< / span >   RCHECK(bit_reader.ReadBits(1, & b_program_id));< / div >
< div class = "line" > < a name = "l00354" > < / a > < span class = "lineno" > 354< / span >   < span class = "keywordflow" > if< / span > (b_program_id) {< / div >
< div class = "line" > < a name = "l00355" > < / a > < span class = "lineno" > 355< / span >   RCHECK(bit_reader.SkipBits(16));< / div >
< div class = "line" > < a name = "l00356" > < / a > < span class = "lineno" > 356< / span >   uint8_t b_uuid = 0;< / div >
< div class = "line" > < a name = "l00357" > < / a > < span class = "lineno" > 357< / span >   RCHECK(bit_reader.ReadBits(1, & b_uuid));< / div >
< div class = "line" > < a name = "l00358" > < / a > < span class = "lineno" > 358< / span >   < span class = "keywordflow" > if< / span > (b_uuid) {< / div >
< div class = "line" > < a name = "l00359" > < / a > < span class = "lineno" > 359< / span >   RCHECK(bit_reader.SkipBits(16 * 8));< / div >
< div class = "line" > < a name = "l00360" > < / a > < span class = "lineno" > 360< / span >   }< / div >
< div class = "line" > < a name = "l00361" > < / a > < span class = "lineno" > 361< / span >   }< / div >
< div class = "line" > < a name = "l00362" > < / a > < span class = "lineno" > 362< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (*bitstream_version == 0 || *bitstream_version == 1) {< / div >
< div class = "line" > < a name = "l00363" > < / a > < span class = "lineno" > 363< / span >   LOG(WARNING) < < < span class = "stringliteral" > " Bitstream version 0 or 1 is not supported" < / span > ;< / div >
< div class = "line" > < a name = "l00364" > < / a > < span class = "lineno" > 364< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00365" > < / a > < span class = "lineno" > 365< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00366" > < / a > < span class = "lineno" > 366< / span >   LOG(WARNING) < < < span class = "stringliteral" > " Invalid Bitstream version" < / span > ;< / div >
< div class = "line" > < a name = "l00367" > < / a > < span class = "lineno" > 367< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00368" > < / a > < span class = "lineno" > 368< / span >   }< / div >
< div class = "line" > < a name = "l00369" > < / a > < span class = "lineno" > 369< / span >   < / div >
< div class = "line" > < a name = "l00370" > < / a > < span class = "lineno" > 370< / span >   RCHECK(bit_reader.SkipBits(66));< / div >
< div class = "line" > < a name = "l00371" > < / a > < span class = "lineno" > 371< / span >   bit_reader.SkipToNextByte();< / div >
< div class = "line" > < a name = "l00372" > < / a > < span class = "lineno" > 372< / span >   < / div >
< div class = "line" > < a name = "l00373" > < / a > < span class = "lineno" > 373< / span >   < span class = "comment" > // AC4 stream containing the single presentation is valid for OTT only.< / span > < / div >
< div class = "line" > < a name = "l00374" > < / a > < span class = "lineno" > 374< / span >   < span class = "comment" > // IMS has two presentations, and the 2nd is legacy (duplicated) presentation.< / span > < / div >
< div class = "line" > < a name = "l00375" > < / a > < span class = "lineno" > 375< / span >   < span class = "comment" > // So it can be considered as AC4 stream with single presentation. And IMS< / span > < / div >
< div class = "line" > < a name = "l00376" > < / a > < span class = "lineno" > 376< / span >   < span class = "comment" > // presentation must be prior to legacy presentation.< / span > < / div >
< div class = "line" > < a name = "l00377" > < / a > < span class = "lineno" > 377< / span >   < span class = "comment" > // In other word, only the 1st presentation in AC4 stream need to be parsed.< / span > < / div >
< div class = "line" > < a name = "l00378" > < / a > < span class = "lineno" > 378< / span >   < span class = "keyword" > const< / span > uint8_t ott_n_presentation = 1;< / div >
< div class = "line" > < a name = "l00379" > < / a > < span class = "lineno" > 379< / span >   < span class = "keywordflow" > for< / span > (uint8_t i = 0; i < ott_n_presentation; i++) {< / div >
< div class = "line" > < a name = "l00380" > < / a > < span class = "lineno" > 380< / span >   RCHECK(bit_reader.ReadBits(8, presentation_version));< / div >
< div class = "line" > < a name = "l00381" > < / a > < span class = "lineno" > 381< / span >   < span class = "comment" > // *presentation_version == 2 means IMS presentation.< / span > < / div >
< div class = "line" > < a name = "l00382" > < / a > < span class = "lineno" > 382< / span >   < span class = "keywordflow" > if< / span > ((*presentation_version == 2 & & n_presentation > 2) ||< / div >
< div class = "line" > < a name = "l00383" > < / a > < span class = "lineno" > 383< / span >   (*presentation_version == 1 & & n_presentation > 1) ) {< / div >
< div class = "line" > < a name = "l00384" > < / a > < span class = "lineno" > 384< / span >   LOG(WARNING) < < < span class = "stringliteral" > " Seeing multiple presentations, only single presentation " < / span > < / div >
< div class = "line" > < a name = "l00385" > < / a > < span class = "lineno" > 385< / span >   < < < span class = "stringliteral" > " (including IMS presentation) is supported" < / span > ;< / div >
< div class = "line" > < a name = "l00386" > < / a > < span class = "lineno" > 386< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00387" > < / a > < span class = "lineno" > 387< / span >   }< / div >
< div class = "line" > < a name = "l00388" > < / a > < span class = "lineno" > 388< / span >   uint32_t pres_bytes;< / div >
< div class = "line" > < a name = "l00389" > < / a > < span class = "lineno" > 389< / span >   RCHECK(bit_reader.ReadBits(8, & pres_bytes));< / div >
< div class = "line" > < a name = "l00390" > < / a > < span class = "lineno" > 390< / span >   < span class = "keywordflow" > if< / span > (pres_bytes == 255) {< / div >
< div class = "line" > < a name = "l00391" > < / a > < span class = "lineno" > 391< / span >   uint32_t add_pres_bytes;< / div >
< div class = "line" > < a name = "l00392" > < / a > < span class = "lineno" > 392< / span >   RCHECK(bit_reader.ReadBits(16, & add_pres_bytes));< / div >
< div class = "line" > < a name = "l00393" > < / a > < span class = "lineno" > 393< / span >   pres_bytes += add_pres_bytes;< / div >
< div class = "line" > < a name = "l00394" > < / a > < span class = "lineno" > 394< / span >   }< / div >
< div class = "line" > < a name = "l00395" > < / a > < span class = "lineno" > 395< / span >   < / div >
< div class = "line" > < a name = "l00396" > < / a > < span class = "lineno" > 396< / span >   < span class = "keywordtype" > size_t< / span > presentation_bits = 0;< / div >
< div class = "line" > < a name = "l00397" > < / a > < span class = "lineno" > 397< / span >   *dolby_ims_indicator = < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00398" > < / a > < span class = "lineno" > 398< / span >   < span class = "keywordflow" > if< / span > (*presentation_version == 0) {< / div >
< div class = "line" > < a name = "l00399" > < / a > < span class = "lineno" > 399< / span >   LOG(WARNING) < < < span class = "stringliteral" > " Presentation version 0 is not supported" < / span > ;< / div >
< div class = "line" > < a name = "l00400" > < / a > < span class = "lineno" > 400< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00401" > < / a > < span class = "lineno" > 401< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00402" > < / a > < span class = "lineno" > 402< / span >   < span class = "keywordflow" > if< / span > (*presentation_version == 1 || *presentation_version == 2) {< / div >
< div class = "line" > < a name = "l00403" > < / a > < span class = "lineno" > 403< / span >   < span class = "keywordflow" > if< / span > (*presentation_version == 2) {< / div >
< div class = "line" > < a name = "l00404" > < / a > < span class = "lineno" > 404< / span >   *dolby_ims_indicator = < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00405" > < / a > < span class = "lineno" > 405< / span >   }< / div >
< div class = "line" > < a name = "l00406" > < / a > < span class = "lineno" > 406< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > presentation_start = bit_reader.bit_position();< / div >
< div class = "line" > < a name = "l00407" > < / a > < span class = "lineno" > 407< / span >   < span class = "comment" > // dolby_atmos_indicator is extended in Dolby internal specs.< / span > < / div >
< div class = "line" > < a name = "l00408" > < / a > < span class = "lineno" > 408< / span >   < span class = "comment" > // It indicates whether the source content before encoding is Atmos.< / span > < / div >
< div class = "line" > < a name = "l00409" > < / a > < span class = "lineno" > 409< / span >   < span class = "comment" > // No final decision about how to use it in OTT.< / span > < / div >
< div class = "line" > < a name = "l00410" > < / a > < span class = "lineno" > 410< / span >   < span class = "comment" > // Parse it for the future usage.< / span > < / div >
< div class = "line" > < a name = "l00411" > < / a > < span class = "lineno" > 411< / span >   uint8_t dolby_atmos_indicator;< / div >
< div class = "line" > < a name = "l00412" > < / a > < span class = "lineno" > 412< / span >   < span class = "keywordflow" > if< / span > (!ParseAC4PresentationV1Dsi(bit_reader, pres_bytes, mdcompat,< / div >
< div class = "line" > < a name = "l00413" > < / a > < span class = "lineno" > 413< / span >   presentation_channel_mask_v1,< / div >
< div class = "line" > < a name = "l00414" > < / a > < span class = "lineno" > 414< / span >   dolby_cbi_indicator,< / div >
< div class = "line" > < a name = "l00415" > < / a > < span class = "lineno" > 415< / span >   & dolby_atmos_indicator)) {< / div >
< div class = "line" > < a name = "l00416" > < / a > < span class = "lineno" > 416< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00417" > < / a > < span class = "lineno" > 417< / span >   }< / div >
< div class = "line" > < a name = "l00418" > < / a > < span class = "lineno" > 418< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > presentation_end = bit_reader.bit_position();< / div >
< div class = "line" > < a name = "l00419" > < / a > < span class = "lineno" > 419< / span >   presentation_bits = presentation_end - presentation_start;< / div >
< div class = "line" > < a name = "l00420" > < / a > < span class = "lineno" > 420< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00421" > < / a > < span class = "lineno" > 421< / span >   LOG(WARNING) < < < span class = "stringliteral" > " Invalid Presentation version" < / span > ;< / div >
< div class = "line" > < a name = "l00422" > < / a > < span class = "lineno" > 422< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00423" > < / a > < span class = "lineno" > 423< / span >   }< / div >
< div class = "line" > < a name = "l00424" > < / a > < span class = "lineno" > 424< / span >   }< / div >
< div class = "line" > < a name = "l00425" > < / a > < span class = "lineno" > 425< / span >   < span class = "keywordtype" > size_t< / span > skip_bits = pres_bytes * 8 - presentation_bits;< / div >
< div class = "line" > < a name = "l00426" > < / a > < span class = "lineno" > 426< / span >   RCHECK(bit_reader.SkipBits(skip_bits));< / div >
< div class = "line" > < a name = "l00427" > < / a > < span class = "lineno" > 427< / span >   }< / div >
< div class = "line" > < a name = "l00428" > < / a > < span class = "lineno" > 428< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00429" > < / a > < span class = "lineno" > 429< / span >   }< / div >
< div class = "line" > < a name = "l00430" > < / a > < span class = "lineno" > 430< / span >   } < span class = "comment" > // namespace< / 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 > CalculateAC4ChannelMask(< span class = "keyword" > const< / span > std::vector< uint8_t> & ac4_data,< / div >
< div class = "line" > < a name = "l00433" > < / a > < span class = "lineno" > 433< / span >   uint32_t* ac4_channel_mask) {< / div >
< div class = "line" > < a name = "l00434" > < / a > < span class = "lineno" > 434< / span >   uint8_t bitstream_version;< / div >
< div class = "line" > < a name = "l00435" > < / a > < span class = "lineno" > 435< / span >   uint8_t presentation_version;< / div >
< div class = "line" > < a name = "l00436" > < / a > < span class = "lineno" > 436< / span >   uint8_t mdcompat;< / div >
< div class = "line" > < a name = "l00437" > < / a > < span class = "lineno" > 437< / span >   uint32_t pre_channel_mask;< / div >
< div class = "line" > < a name = "l00438" > < / a > < span class = "lineno" > 438< / span >   < span class = "keywordtype" > bool< / span > dolby_ims_indicator;< / div >
< div class = "line" > < a name = "l00439" > < / a > < span class = "lineno" > 439< / span >   < span class = "keywordtype" > bool< / span > dolby_cbi_indicator;< / 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 = "keywordflow" > if< / span > (!ExtractAc4Data(ac4_data, & bitstream_version, & presentation_version,< / div >
< div class = "line" > < a name = "l00442" > < / a > < span class = "lineno" > 442< / span >   & mdcompat, & pre_channel_mask, & dolby_ims_indicator,< / div >
< div class = "line" > < a name = "l00443" > < / a > < span class = "lineno" > 443< / span >   & dolby_cbi_indicator)) {< / div >
< div class = "line" > < a name = "l00444" > < / a > < span class = "lineno" > 444< / span >   LOG(WARNING) < < < span class = "stringliteral" > " Seeing invalid AC4 data: " < / span > < / div >
< div class = "line" > < a name = "l00445" > < / a > < span class = "lineno" > 445< / span >   < < base::HexEncode(ac4_data.data(), ac4_data.size());< / div >
< div class = "line" > < a name = "l00446" > < / a > < span class = "lineno" > 446< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00447" > < / a > < span class = "lineno" > 447< / span >   }< / div >
< div class = "line" > < a name = "l00448" > < / a > < span class = "lineno" > 448< / span >   < / div >
< div class = "line" > < a name = "l00449" > < / a > < span class = "lineno" > 449< / span >   < span class = "keywordflow" > if< / span > (pre_channel_mask) {< / div >
< div class = "line" > < a name = "l00450" > < / a > < span class = "lineno" > 450< / span >   *ac4_channel_mask = pre_channel_mask;< / div >
< div class = "line" > < a name = "l00451" > < / a > < span class = "lineno" > 451< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00452" > < / a > < span class = "lineno" > 452< / span >   *ac4_channel_mask = 0x800000;< / div >
< div class = "line" > < a name = "l00453" > < / a > < span class = "lineno" > 453< / span >   }< / div >
< div class = "line" > < a name = "l00454" > < / a > < span class = "lineno" > 454< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00455" > < / a > < span class = "lineno" > 455< / span >   }< / div >
< div class = "line" > < a name = "l00456" > < / a > < span class = "lineno" > 456< / span >   < / div >
< div class = "line" > < a name = "l00457" > < / a > < span class = "lineno" > 457< / span >   < span class = "keywordtype" > bool< / span > CalculateAC4ChannelMPEGValue(< span class = "keyword" > const< / span > std::vector< uint8_t> & ac4_data,< / div >
< div class = "line" > < a name = "l00458" > < / a > < span class = "lineno" > 458< / span >   uint32_t* ac4_channel_mpeg_value) {< / div >
< div class = "line" > < a name = "l00459" > < / a > < span class = "lineno" > 459< / span >   uint8_t bitstream_version;< / div >
< div class = "line" > < a name = "l00460" > < / a > < span class = "lineno" > 460< / span >   uint8_t presentation_version;< / div >
< div class = "line" > < a name = "l00461" > < / a > < span class = "lineno" > 461< / span >   uint8_t mdcompat;< / div >
< div class = "line" > < a name = "l00462" > < / a > < span class = "lineno" > 462< / span >   uint32_t pre_channel_mask;< / div >
< div class = "line" > < a name = "l00463" > < / a > < span class = "lineno" > 463< / span >   < span class = "keywordtype" > bool< / span > dolby_ims_indicator;< / div >
< div class = "line" > < a name = "l00464" > < / a > < span class = "lineno" > 464< / span >   < span class = "keywordtype" > bool< / span > dolby_cbi_indicator;< / div >
< div class = "line" > < a name = "l00465" > < / a > < span class = "lineno" > 465< / span >   < / div >
< div class = "line" > < a name = "l00466" > < / a > < span class = "lineno" > 466< / span >   < span class = "keywordflow" > if< / span > (!ExtractAc4Data(ac4_data, & bitstream_version, & presentation_version,< / div >
< div class = "line" > < a name = "l00467" > < / a > < span class = "lineno" > 467< / span >   & mdcompat, & pre_channel_mask, & dolby_ims_indicator,< / div >
< div class = "line" > < a name = "l00468" > < / a > < span class = "lineno" > 468< / span >   & dolby_cbi_indicator)) {< / div >
< div class = "line" > < a name = "l00469" > < / a > < span class = "lineno" > 469< / span >   LOG(WARNING) < < < span class = "stringliteral" > " Seeing invalid AC4 data: " < / span > < / div >
< div class = "line" > < a name = "l00470" > < / a > < span class = "lineno" > 470< / span >   < < base::HexEncode(ac4_data.data(), ac4_data.size());< / div >
< div class = "line" > < a name = "l00471" > < / a > < span class = "lineno" > 471< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00472" > < / a > < span class = "lineno" > 472< / span >   }< / div >
< div class = "line" > < a name = "l00473" > < / a > < span class = "lineno" > 473< / span >   < / div >
< div class = "line" > < a name = "l00474" > < / a > < span class = "lineno" > 474< / span >   *ac4_channel_mpeg_value = AC4ChannelMasktoMPEGValue(pre_channel_mask);< / div >
< div class = "line" > < a name = "l00475" > < / a > < span class = "lineno" > 475< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / 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 = "keywordtype" > bool< / span > GetAc4CodecInfo(< span class = "keyword" > const< / span > std::vector< uint8_t> & ac4_data,< / div >
< div class = "line" > < a name = "l00479" > < / a > < span class = "lineno" > 479< / span >   uint8_t* ac4_codec_info) {< / div >
< div class = "line" > < a name = "l00480" > < / a > < span class = "lineno" > 480< / span >   uint8_t bitstream_version;< / div >
< div class = "line" > < a name = "l00481" > < / a > < span class = "lineno" > 481< / span >   uint8_t presentation_version;< / div >
< div class = "line" > < a name = "l00482" > < / a > < span class = "lineno" > 482< / span >   uint8_t mdcompat;< / div >
< div class = "line" > < a name = "l00483" > < / a > < span class = "lineno" > 483< / span >   uint32_t pre_channel_mask;< / div >
< div class = "line" > < a name = "l00484" > < / a > < span class = "lineno" > 484< / span >   < span class = "keywordtype" > bool< / span > dolby_ims_indicator;< / div >
< div class = "line" > < a name = "l00485" > < / a > < span class = "lineno" > 485< / span >   < span class = "keywordtype" > bool< / span > dolby_cbi_indicator;< / div >
< div class = "line" > < a name = "l00486" > < / a > < span class = "lineno" > 486< / span >   < / div >
< div class = "line" > < a name = "l00487" > < / a > < span class = "lineno" > 487< / span >   < span class = "keywordflow" > if< / span > (!ExtractAc4Data(ac4_data, & bitstream_version, & presentation_version,< / div >
< div class = "line" > < a name = "l00488" > < / a > < span class = "lineno" > 488< / span >   & mdcompat, & pre_channel_mask, & dolby_ims_indicator,< / div >
< div class = "line" > < a name = "l00489" > < / a > < span class = "lineno" > 489< / span >   & dolby_cbi_indicator)) {< / div >
< div class = "line" > < a name = "l00490" > < / a > < span class = "lineno" > 490< / span >   LOG(WARNING) < < < span class = "stringliteral" > " Seeing invalid AC4 data: " < / span > < / div >
< div class = "line" > < a name = "l00491" > < / a > < span class = "lineno" > 491< / span >   < < base::HexEncode(ac4_data.data(), ac4_data.size());< / 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 >   < / div >
< div class = "line" > < a name = "l00495" > < / a > < span class = "lineno" > 495< / span >   < span class = "comment" > // The valid value of bitstream_version (8 bits) is 2, the valid value of< / span > < / div >
< div class = "line" > < a name = "l00496" > < / a > < span class = "lineno" > 496< / span >   < span class = "comment" > // presentation_version (8 bits) is 1 or 2, and mdcompat is 3 bits.< / span > < / div >
< div class = "line" > < a name = "l00497" > < / a > < span class = "lineno" > 497< / span >   < span class = "comment" > // So uint8_t is fine now. If Dolby extends the value of bitstream_version and< / span > < / div >
< div class = "line" > < a name = "l00498" > < / a > < span class = "lineno" > 498< / span >   < span class = "comment" > // presentation_version in future, maybe need change the type from uint8_t to< / span > < / div >
< div class = "line" > < a name = "l00499" > < / a > < span class = "lineno" > 499< / span >   < span class = "comment" > // uint16_t or uint32_t to accommodate the valid values.< / span > < / div >
< div class = "line" > < a name = "l00500" > < / a > < span class = "lineno" > 500< / span >   < span class = "comment" > // If that, AudioStreamInfo::GetCodecString need to be changed accordingly.< / span > < / div >
< div class = "line" > < a name = "l00501" > < / a > < span class = "lineno" > 501< / span >   < span class = "comment" > // bitstream_version (3bits) + presentation_version (2bits) + mdcompat (3bits)< / span > < / div >
< div class = "line" > < a name = "l00502" > < / a > < span class = "lineno" > 502< / span >   *ac4_codec_info = ((bitstream_version < < 5) |< / div >
< div class = "line" > < a name = "l00503" > < / a > < span class = "lineno" > 503< / span >   ((presentation_version < < 3) & 0x1F) |< / div >
< div class = "line" > < a name = "l00504" > < / a > < span class = "lineno" > 504< / span >   (mdcompat & 0x7));< / div >
< div class = "line" > < a name = "l00505" > < / a > < span class = "lineno" > 505< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / 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" > bool< / span > GetAc4ImmersiveInfo(< span class = "keyword" > const< / span > std::vector< uint8_t> & ac4_data,< / div >
< div class = "line" > < a name = "l00509" > < / a > < span class = "lineno" > 509< / span >   < span class = "keywordtype" > bool< / span > * ac4_ims_flag,< / div >
< div class = "line" > < a name = "l00510" > < / a > < span class = "lineno" > 510< / span >   < span class = "keywordtype" > bool< / span > * ac4_cbi_flag) {< / div >
< div class = "line" > < a name = "l00511" > < / a > < span class = "lineno" > 511< / span >   uint8_t bitstream_version;< / div >
< div class = "line" > < a name = "l00512" > < / a > < span class = "lineno" > 512< / span >   uint8_t presentation_version;< / div >
< div class = "line" > < a name = "l00513" > < / a > < span class = "lineno" > 513< / span >   uint8_t mdcompat;< / div >
< div class = "line" > < a name = "l00514" > < / a > < span class = "lineno" > 514< / span >   uint32_t pre_channel_mask;< / div >
< div class = "line" > < a name = "l00515" > < / a > < span class = "lineno" > 515< / span >   < / div >
< div class = "line" > < a name = "l00516" > < / a > < span class = "lineno" > 516< / span >   < span class = "keywordflow" > if< / span > (!ExtractAc4Data(ac4_data, & bitstream_version, & presentation_version,< / div >
< div class = "line" > < a name = "l00517" > < / a > < span class = "lineno" > 517< / span >   & mdcompat, & pre_channel_mask, ac4_ims_flag,< / div >
< div class = "line" > < a name = "l00518" > < / a > < span class = "lineno" > 518< / span >   ac4_cbi_flag)) {< / div >
< div class = "line" > < a name = "l00519" > < / a > < span class = "lineno" > 519< / span >   LOG(WARNING) < < < span class = "stringliteral" > " Seeing invalid AC4 data: " < / span > < / div >
< div class = "line" > < a name = "l00520" > < / a > < span class = "lineno" > 520< / span >   < < base::HexEncode(ac4_data.data(), ac4_data.size());< / div >
< div class = "line" > < a name = "l00521" > < / a > < span class = "lineno" > 521< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00522" > < / a > < span class = "lineno" > 522< / span >   }< / div >
< div class = "line" > < a name = "l00523" > < / a > < span class = "lineno" > 523< / span >   < / div >
< div class = "line" > < a name = "l00524" > < / a > < span class = "lineno" > 524< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00525" > < / a > < span class = "lineno" > 525< / span >   }< / div >
< div class = "line" > < a name = "l00526" > < / a > < span class = "lineno" > 526< / span >   < / div >
< div class = "line" > < a name = "l00527" > < / a > < span class = "lineno" > 527< / span >   } < span class = "comment" > // namespace media< / span > < / div >
< div class = "line" > < a name = "l00528" > < / a > < span class = "lineno" > 528< / span >   } < span class = "comment" > // namespace shaka< / span > < / div >
< / div > <!-- fragment --> < / div > <!-- contents -->
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< div class = "ttc" id = "anamespaceshaka_html" > < div class = "ttname" > < a href = "../../d8/daf/namespaceshaka.html" > shaka< / a > < / div > < div class = "ttdoc" > All the methods that are virtual are virtual for mocking.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/d15/gflags__hex__bytes_8cc_source.html#l00011" > gflags_hex_bytes.cc:11< / a > < / div > < / div >
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< / a > 1.8.17
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