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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_375ba2cfd8fd5b05c50b92d996b9d386.html" > formats< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_35c1fdffcdd4ade6d7f948073ab165de.html" > mp2t< / a > < / li > < / ul >
< / div >
< / div > <!-- top -->
< div class = "header" >
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< div class = "title" > ac3_header.cc< / div > < / div >
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< div class = "contents" >
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< 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/formats/mp2t/ac3_header.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/media/base/bit_reader.h" < / span > < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < span class = "preprocessor" > #include " packager/media/base/bit_writer.h" < / span > < / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < span class = "preprocessor" > #include " packager/media/formats/mp2t/mp2t_common.h" < / span > < / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < span class = "keyword" > namespace < / span > < a class = "code" href = "../../d8/daf/namespaceshaka.html" > shaka< / a > {< / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < span class = "keyword" > namespace < / span > media {< / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < span class = "keyword" > namespace < / span > mp2t {< / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < span class = "keyword" > namespace < / span > {< / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < span class = "comment" > // ASTC Standard A/52:2012 Table 5.6 Sample Rate Codes.< / span > < / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < span class = "keyword" > const< / span > uint32_t kAc3SampleRateTable[] = {48000, 44100, 32000};< / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < span class = "comment" > // ASTC Standard A/52:2012 Table 5.8 Audio Coding Mode.< / span > < / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < span class = "keyword" > const< / span > uint8_t kAc3NumChannelsTable[] = {2, 1, 2, 3, 3, 4, 4, 5};< / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   < / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   < span class = "comment" > // ATSC Standard A/52:2012 Table 5.18 Frame Size Code Table< / span > < / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   < span class = "comment" > // (in words = 16 bits).< / span > < / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > kFrameSizeCodeTable[][3] = {< / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < span class = "comment" > // {32kHz, 44.1kHz, 48kHz}< / span > < / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   {96, 69, 64}, {96, 70, 64}, {120, 87, 80},< / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   {120, 88, 80}, {144, 104, 96}, {144, 105, 96},< / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   {168, 121, 112}, {168, 122, 112}, {192, 139, 128},< / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   {192, 140, 128}, {240, 174, 160}, {240, 175, 160},< / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   {288, 208, 192}, {288, 209, 192}, {336, 243, 224},< / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   {336, 244, 224}, {384, 278, 256}, {384, 279, 256},< / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   {480, 348, 320}, {480, 349, 320}, {576, 417, 384},< / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   {576, 418, 384}, {672, 487, 448}, {672, 488, 448},< / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   {768, 557, 512}, {768, 558, 512}, {960, 696, 640},< / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   {960, 697, 640}, {1152, 835, 768}, {1152, 836, 768},< / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   {1344, 975, 896}, {1344, 976, 896}, {1536, 1114, 1024},< / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   {1536, 1115, 1024}, {1728, 1253, 1152}, {1728, 1254, 1152},< / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   {1920, 1393, 1280}, {1920, 1394, 1280},< / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   };< / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   < / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   < span class = "comment" > // Calculate the size of the frame from the sample rate code and the< / span > < / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   < span class = "comment" > // frame size code.< / span > < / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   < span class = "comment" > // @return the size of the frame (header + payload).< / span > < / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   < span class = "keywordtype" > size_t< / span > CalcFrameSize(uint8_t fscod, uint8_t frmsizecod) {< / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > kNumFscode = arraysize(kAc3SampleRateTable);< / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   DCHECK_LT(fscod, kNumFscode);< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   DCHECK_LT(frmsizecod, arraysize(kFrameSizeCodeTable));< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   < span class = "comment" > // The order of frequencies are reversed in |kFrameSizeCodeTable| compared to< / span > < / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   < span class = "comment" > // |kAc3SampleRateTable|.< / span > < / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > int< / span > index = kNumFscode - 1 - fscod;< / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < span class = "keywordflow" > return< / span > kFrameSizeCodeTable[frmsizecod][index] * 2;< / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   }< / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   < / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   } < span class = "comment" > // namespace< / span > < / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   < / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > < a class = "line" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a44c8ac7a2dd57a1b099722632e7e39f0" > 58< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a44c8ac7a2dd57a1b099722632e7e39f0" > Ac3Header::IsSyncWord< / a > (< span class = "keyword" > const< / span > uint8_t* buf)< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   DCHECK(buf);< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   < span class = "comment" > // ATSC Standard A/52:2012 5.4.1 syncinfo: Synchronization Information.< / span > < / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   < span class = "keywordflow" > return< / span > buf[0] == 0x0B & & buf[1] == 0x77;< / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   }< / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   < / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > < a class = "line" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a3c589cda189b06d9ca3b90a56db24829" > 64< / a > < / span >   < span class = "keywordtype" > size_t< / span > < a class = "code" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a3c589cda189b06d9ca3b90a56db24829" > Ac3Header::GetMinFrameSize< / a > ()< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   < span class = "comment" > // Arbitrary. Actual frame size starts with 96 words.< / span > < / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > kMinAc3FrameSize = 10u;< / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   < span class = "keywordflow" > return< / span > kMinAc3FrameSize;< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   }< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > < a class = "line" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#ac5d9c726fd88989e36e490d2aeb1011f" > 70< / a > < / span >   < span class = "keywordtype" > size_t< / span > < a class = "code" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#ac5d9c726fd88989e36e490d2aeb1011f" > Ac3Header::GetSamplesPerFrame< / a > ()< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   < span class = "comment" > // ATSC Standard A/52:2012< / span > < / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   < span class = "comment" > // Annex A: AC-3 Elementary Streams in the MPEG-2 Multiplex.< / span > < / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > kSamplesPerAc3Frame = 1536;< / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < span class = "keywordflow" > return< / span > kSamplesPerAc3Frame;< / 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 >   < / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > < a class = "line" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a04733336c57460238d0279decaa3939c" > 77< / a > < / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a04733336c57460238d0279decaa3939c" > Ac3Header::Parse< / a > (< span class = "keyword" > const< / span > uint8_t* audio_frame, < span class = "keywordtype" > size_t< / span > audio_frame_size) {< / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   < a class = "code" href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html" > BitReader< / a > frame(audio_frame, audio_frame_size);< / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   < / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   < span class = "comment" > // ASTC Standard A/52:2012 5. BIT STREAM SYNTAX.< / span > < / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   < span class = "comment" > // syncinfo: synchronization information section.< / span > < / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   uint16_t syncword;< / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   RCHECK(frame.< a class = "code" href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4" > ReadBits< / a > (16, & syncword));< / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   RCHECK(syncword == 0x0B77);< / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   uint16_t crc1;< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   RCHECK(frame.< a class = "code" href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4" > ReadBits< / a > (16, & crc1));< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   RCHECK(frame.< a class = "code" href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4" > ReadBits< / a > (2, & fscod_));< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   RCHECK(fscod_ < arraysize(kAc3SampleRateTable));< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   RCHECK(frame.< a class = "code" href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4" > ReadBits< / a > (6, & frmsizecod_));< / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   RCHECK(frmsizecod_ < arraysize(kFrameSizeCodeTable));< / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   < / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   < span class = "comment" > // bsi: bit stream information section.< / span > < / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   RCHECK(frame.< a class = "code" href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4" > ReadBits< / a > (5, & bsid_));< / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   RCHECK(frame.< a class = "code" href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4" > ReadBits< / a > (3, & bsmod_));< / div >
< div class = "line" > < a name = "l00095" > < / a > < span class = "lineno" > 95< / span >   < / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   RCHECK(frame.< a class = "code" href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4" > ReadBits< / a > (3, & acmod_));< / div >
< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   RCHECK(acmod_ < arraysize(kAc3NumChannelsTable));< / div >
< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   < span class = "comment" > // If 3 front channels.< / span > < / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   < span class = "keywordflow" > if< / span > ((acmod_ & 0x01) & & (acmod_ != 0x01))< / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   RCHECK(frame.< a class = "code" href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html#a4ab20ef220c76072eaecb982aba0541d" > SkipBits< / a > (2)); < span class = "comment" > // cmixlev.< / span > < / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   < span class = "comment" > // If a surround channel exists.< / span > < / div >
< div class = "line" > < a name = "l00102" > < / a > < span class = "lineno" > 102< / span >   < span class = "keywordflow" > if< / span > (acmod_ & 0x04)< / div >
< div class = "line" > < a name = "l00103" > < / a > < span class = "lineno" > 103< / span >   RCHECK(frame.< a class = "code" href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html#a4ab20ef220c76072eaecb982aba0541d" > SkipBits< / a > (2)); < span class = "comment" > // surmixlev.< / span > < / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   < span class = "comment" > // If in 2/0 mode.< / span > < / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   < span class = "keywordflow" > if< / span > (acmod_ == 0x02)< / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   RCHECK(frame.< a class = "code" href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html#a4ab20ef220c76072eaecb982aba0541d" > SkipBits< / a > (2)); < span class = "comment" > // dsurmod.< / span > < / 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 >   RCHECK(frame.< a class = "code" href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4" > ReadBits< / a > (1, & lfeon_));< / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   < / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   }< / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   < / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > < a class = "line" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a58d93e453c2fed3d500badb40a349eed" > 113< / a > < / span >   < span class = "keywordtype" > size_t< / span > < a class = "code" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a58d93e453c2fed3d500badb40a349eed" > Ac3Header::GetHeaderSize< / a > ()< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   < span class = "comment" > // Unlike ADTS, for AC3, the whole frame is included in the media sample, so< / span > < / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   < span class = "comment" > // return 0 header size.< / span > < / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   < span class = "keywordflow" > return< / span > 0;< / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   }< / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   < / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > < a class = "line" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a8065975e78028683180cd3ae65925c37" > 119< / a > < / span >   < span class = "keywordtype" > size_t< / span > < a class = "code" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a8065975e78028683180cd3ae65925c37" > Ac3Header::GetFrameSize< / a > ()< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   < span class = "keywordflow" > return< / span > CalcFrameSize(fscod_, frmsizecod_);< / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   }< / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   < / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > < a class = "line" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a96b66d1749bfafc8a7326fa37f435cd5" > 123< / a > < / span >   < span class = "keywordtype" > size_t< / span > < a class = "code" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a96b66d1749bfafc8a7326fa37f435cd5" > Ac3Header::GetFrameSizeWithoutParsing< / a > (< span class = "keyword" > const< / span > uint8_t* data,< / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   < span class = "keywordtype" > size_t< / span > num_bytes)< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > 125< / span >   DCHECK_GT(num_bytes, < span class = "keyword" > static_cast< < / span > < span class = "keywordtype" > size_t< / span > < span class = "keyword" > > < / span > (4));< / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   uint8_t fscod = data[4] > > 6;< / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   uint8_t frmsizecod = data[4] & 0x3f;< / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > 128< / span >   < span class = "keywordflow" > return< / span > CalcFrameSize(fscod, frmsizecod);< / div >
< div class = "line" > < a name = "l00129" > < / a > < span class = "lineno" > 129< / span >   }< / div >
< div class = "line" > < a name = "l00130" > < / a > < span class = "lineno" > 130< / span >   < / div >
< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > < a class = "line" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a9a3da0ed02d1790ec176a75bbbdef146" > 131< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a9a3da0ed02d1790ec176a75bbbdef146" > Ac3Header::GetAudioSpecificConfig< / a > (std::vector< uint8_t> * buffer)< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   DCHECK(buffer);< / div >
< div class = "line" > < a name = "l00133" > < / a > < span class = "lineno" > 133< / span >   buffer-> clear();< / div >
< div class = "line" > < a name = "l00134" > < / a > < span class = "lineno" > 134< / span >   < a class = "code" href = "../../dc/d76/classshaka_1_1media_1_1BitWriter.html" > BitWriter< / a > config(buffer);< / div >
< div class = "line" > < a name = "l00135" > < / a > < span class = "lineno" > 135< / span >   < span class = "comment" > // Accoding to ETSI TS 102 366 V1.3.1 (2014-08) F.4 AC3SpecificBox.< / span > < / div >
< div class = "line" > < a name = "l00136" > < / a > < span class = "lineno" > 136< / span >   config.< a class = "code" href = "../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1" > WriteBits< / a > (fscod_, 2);< / div >
< div class = "line" > < a name = "l00137" > < / a > < span class = "lineno" > 137< / span >   config.< a class = "code" href = "../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1" > WriteBits< / a > (bsid_, 5);< / div >
< div class = "line" > < a name = "l00138" > < / a > < span class = "lineno" > 138< / span >   config.< a class = "code" href = "../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1" > WriteBits< / a > (bsmod_, 3);< / div >
< div class = "line" > < a name = "l00139" > < / a > < span class = "lineno" > 139< / span >   config.< a class = "code" href = "../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1" > WriteBits< / a > (acmod_, 3);< / div >
< div class = "line" > < a name = "l00140" > < / a > < span class = "lineno" > 140< / span >   config.< a class = "code" href = "../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1" > WriteBits< / a > (lfeon_, 1);< / div >
< div class = "line" > < a name = "l00141" > < / a > < span class = "lineno" > 141< / span >   < span class = "keyword" > const< / span > uint8_t bit_rate_code = frmsizecod_ > > 1;< / div >
< div class = "line" > < a name = "l00142" > < / a > < span class = "lineno" > 142< / span >   config.< a class = "code" href = "../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1" > WriteBits< / a > (bit_rate_code, 5);< / div >
< div class = "line" > < a name = "l00143" > < / a > < span class = "lineno" > 143< / span >   config.< a class = "code" href = "../../dc/d76/classshaka_1_1media_1_1BitWriter.html#a1c14f04a0bb3090edb3ac0fffa346bc1" > Flush< / a > ();< / div >
< div class = "line" > < a name = "l00144" > < / a > < span class = "lineno" > 144< / span >   }< / div >
< div class = "line" > < a name = "l00145" > < / a > < span class = "lineno" > 145< / span >   < / div >
< div class = "line" > < a name = "l00146" > < / a > < span class = "lineno" > < a class = "line" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a56de14f98afd205f03bda6b110835aae" > 146< / a > < / span >   uint8_t < a class = "code" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a56de14f98afd205f03bda6b110835aae" > Ac3Header::GetObjectType< / a > ()< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00147" > < / a > < span class = "lineno" > 147< / span >   < span class = "comment" > // Only useful for AAC. Return a dummy value instead.< / span > < / div >
< div class = "line" > < a name = "l00148" > < / a > < span class = "lineno" > 148< / span >   < span class = "keywordflow" > return< / span > 0;< / div >
< div class = "line" > < a name = "l00149" > < / a > < span class = "lineno" > 149< / span >   }< / div >
< div class = "line" > < a name = "l00150" > < / a > < span class = "lineno" > 150< / span >   < / div >
< div class = "line" > < a name = "l00151" > < / a > < span class = "lineno" > < a class = "line" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#aa238ec0832e097f2f5791e915bf30127" > 151< / a > < / span >   uint32_t < a class = "code" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#aa238ec0832e097f2f5791e915bf30127" > Ac3Header::GetSamplingFrequency< / a > ()< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00152" > < / a > < span class = "lineno" > 152< / span >   DCHECK_LT(fscod_, arraysize(kAc3SampleRateTable));< / div >
< div class = "line" > < a name = "l00153" > < / a > < span class = "lineno" > 153< / span >   < span class = "keywordflow" > return< / span > kAc3SampleRateTable[fscod_];< / div >
< div class = "line" > < a name = "l00154" > < / a > < span class = "lineno" > 154< / span >   }< / div >
< div class = "line" > < a name = "l00155" > < / a > < span class = "lineno" > 155< / span >   < / div >
< div class = "line" > < a name = "l00156" > < / a > < span class = "lineno" > < a class = "line" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#abab9685652b78baf25b7399477401bd7" > 156< / a > < / span >   uint8_t < a class = "code" href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#abab9685652b78baf25b7399477401bd7" > Ac3Header::GetNumChannels< / a > ()< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00157" > < / a > < span class = "lineno" > 157< / span >   DCHECK_LT(acmod_, arraysize(kAc3NumChannelsTable));< / div >
< div class = "line" > < a name = "l00158" > < / a > < span class = "lineno" > 158< / span >   < span class = "keywordflow" > return< / span > kAc3NumChannelsTable[acmod_] + (lfeon_ ? 1 : 0);< / div >
< div class = "line" > < a name = "l00159" > < / a > < span class = "lineno" > 159< / span >   }< / div >
< div class = "line" > < a name = "l00160" > < / a > < span class = "lineno" > 160< / span >   < / div >
< div class = "line" > < a name = "l00161" > < / a > < span class = "lineno" > 161< / span >   } < span class = "comment" > // namespace mp2t< / span > < / div >
< div class = "line" > < a name = "l00162" > < / a > < span class = "lineno" > 162< / span >   } < span class = "comment" > // namespace media< / span > < / div >
< div class = "line" > < a name = "l00163" > < / a > < span class = "lineno" > 163< / span >   } < span class = "comment" > // namespace shaka< / span > < / div >
2021-06-22 00:16:40 +00:00
< / div > <!-- fragment --> < / div > <!-- contents -->
2021-04-10 04:00:37 +00:00
< div class = "ttc" id = "aclassshaka_1_1media_1_1BitReader_html_ae40382c4ca4a57b3bb3531a337aebbe4" > < div class = "ttname" > < a href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html#ae40382c4ca4a57b3bb3531a337aebbe4" > shaka::media::BitReader::ReadBits< / a > < / div > < div class = "ttdeci" > bool ReadBits(size_t num_bits, T *out)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/dd3/bit__reader_8h_source.html#l00035" > bit_reader.h:35< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a58d93e453c2fed3d500badb40a349eed" > < div class = "ttname" > < a href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a58d93e453c2fed3d500badb40a349eed" > shaka::media::mp2t::Ac3Header::GetHeaderSize< / a > < / div > < div class = "ttdeci" > size_t GetHeaderSize() const override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d9/dda/ac3__header_8cc_source.html#l00113" > ac3_header.cc:113< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a96b66d1749bfafc8a7326fa37f435cd5" > < div class = "ttname" > < a href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a96b66d1749bfafc8a7326fa37f435cd5" > shaka::media::mp2t::Ac3Header::GetFrameSizeWithoutParsing< / a > < / div > < div class = "ttdeci" > size_t GetFrameSizeWithoutParsing(const uint8_t *data, size_t num_bytes) const override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d9/dda/ac3__header_8cc_source.html#l00123" > ac3_header.cc:123< / a > < / div > < / div >
2021-06-22 00:16:40 +00:00
< div class = "ttc" id = "anamespaceshaka_html" > < div class = "ttname" > < a href = "../../d8/daf/namespaceshaka.html" > shaka< / a > < / div > < div class = "ttdoc" > All the methods that are virtual are virtual for mocking.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/d15/gflags__hex__bytes_8cc_source.html#l00011" > gflags_hex_bytes.cc:11< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1BitReader_html" > < div class = "ttname" > < a href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html" > shaka::media::BitReader< / a > < / div > < div class = "ttdoc" > A class to read bit streams.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/dd3/bit__reader_8h_source.html#l00017" > bit_reader.h:17< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a44c8ac7a2dd57a1b099722632e7e39f0" > < div class = "ttname" > < a href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a44c8ac7a2dd57a1b099722632e7e39f0" > shaka::media::mp2t::Ac3Header::IsSyncWord< / a > < / div > < div class = "ttdeci" > bool IsSyncWord(const uint8_t *buf) const override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d9/dda/ac3__header_8cc_source.html#l00058" > ac3_header.cc:58< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1BitWriter_html" > < div class = "ttname" > < a href = "../../dc/d76/classshaka_1_1media_1_1BitWriter.html" > shaka::media::BitWriter< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d0/dbc/bit__writer_8h_source.html#l00019" > bit_writer.h:19< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a3c589cda189b06d9ca3b90a56db24829" > < div class = "ttname" > < a href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a3c589cda189b06d9ca3b90a56db24829" > shaka::media::mp2t::Ac3Header::GetMinFrameSize< / a > < / div > < div class = "ttdeci" > size_t GetMinFrameSize() const override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d9/dda/ac3__header_8cc_source.html#l00064" > ac3_header.cc:64< / a > < / div > < / div >
2021-04-10 04:00:37 +00:00
< div class = "ttc" id = "aclassshaka_1_1media_1_1mp2t_1_1Ac3Header_html_aa238ec0832e097f2f5791e915bf30127" > < div class = "ttname" > < a href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#aa238ec0832e097f2f5791e915bf30127" > shaka::media::mp2t::Ac3Header::GetSamplingFrequency< / a > < / div > < div class = "ttdeci" > uint32_t GetSamplingFrequency() const override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d9/dda/ac3__header_8cc_source.html#l00151" > ac3_header.cc:151< / a > < / div > < / div >
2021-06-22 00:16:40 +00:00
< div class = "ttc" id = "aclassshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a8065975e78028683180cd3ae65925c37" > < div class = "ttname" > < a href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a8065975e78028683180cd3ae65925c37" > shaka::media::mp2t::Ac3Header::GetFrameSize< / a > < / div > < div class = "ttdeci" > size_t GetFrameSize() const override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d9/dda/ac3__header_8cc_source.html#l00119" > ac3_header.cc:119< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1BitWriter_html_aee5f905e55f262e38f5df506611663f1" > < div class = "ttname" > < a href = "../../dc/d76/classshaka_1_1media_1_1BitWriter.html#aee5f905e55f262e38f5df506611663f1" > shaka::media::BitWriter::WriteBits< / a > < / div > < div class = "ttdeci" > void WriteBits(uint32_t bits, size_t number_of_bits)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/d58/bit__writer_8cc_source.html#l00015" > bit_writer.cc:15< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1BitReader_html_a4ab20ef220c76072eaecb982aba0541d" > < div class = "ttname" > < a href = "../../d6/da9/classshaka_1_1media_1_1BitReader.html#a4ab20ef220c76072eaecb982aba0541d" > shaka::media::BitReader::SkipBits< / a > < / div > < div class = "ttdeci" > bool SkipBits(size_t num_bits)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/de0/bit__reader_8cc_source.html#l00024" > bit_reader.cc:24< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a56de14f98afd205f03bda6b110835aae" > < div class = "ttname" > < a href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a56de14f98afd205f03bda6b110835aae" > shaka::media::mp2t::Ac3Header::GetObjectType< / a > < / div > < div class = "ttdeci" > uint8_t GetObjectType() const override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d9/dda/ac3__header_8cc_source.html#l00146" > ac3_header.cc:146< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a04733336c57460238d0279decaa3939c" > < div class = "ttname" > < a href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a04733336c57460238d0279decaa3939c" > shaka::media::mp2t::Ac3Header::Parse< / a > < / div > < div class = "ttdeci" > bool Parse(const uint8_t *adts_frame, size_t adts_frame_size) override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d9/dda/ac3__header_8cc_source.html#l00077" > ac3_header.cc:77< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1BitWriter_html_a1c14f04a0bb3090edb3ac0fffa346bc1" > < div class = "ttname" > < a href = "../../dc/d76/classshaka_1_1media_1_1BitWriter.html#a1c14f04a0bb3090edb3ac0fffa346bc1" > shaka::media::BitWriter::Flush< / a > < / div > < div class = "ttdeci" > void Flush()< / div > < div class = "ttdoc" > Write pending bits, and align bitstream with extra zero bits.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/d58/bit__writer_8cc_source.html#l00031" > bit_writer.cc:31< / a > < / div > < / div >
2021-04-10 04:00:37 +00:00
< div class = "ttc" id = "aclassshaka_1_1media_1_1mp2t_1_1Ac3Header_html_ac5d9c726fd88989e36e490d2aeb1011f" > < div class = "ttname" > < a href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#ac5d9c726fd88989e36e490d2aeb1011f" > shaka::media::mp2t::Ac3Header::GetSamplesPerFrame< / a > < / div > < div class = "ttdeci" > size_t GetSamplesPerFrame() const override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d9/dda/ac3__header_8cc_source.html#l00070" > ac3_header.cc:70< / a > < / div > < / div >
2021-06-22 00:16:40 +00:00
< div class = "ttc" id = "aclassshaka_1_1media_1_1mp2t_1_1Ac3Header_html_abab9685652b78baf25b7399477401bd7" > < div class = "ttname" > < a href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#abab9685652b78baf25b7399477401bd7" > shaka::media::mp2t::Ac3Header::GetNumChannels< / a > < / div > < div class = "ttdeci" > uint8_t GetNumChannels() const override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d9/dda/ac3__header_8cc_source.html#l00156" > ac3_header.cc:156< / a > < / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1mp2t_1_1Ac3Header_html_a9a3da0ed02d1790ec176a75bbbdef146" > < div class = "ttname" > < a href = "../../dc/d21/classshaka_1_1media_1_1mp2t_1_1Ac3Header.html#a9a3da0ed02d1790ec176a75bbbdef146" > shaka::media::mp2t::Ac3Header::GetAudioSpecificConfig< / a > < / div > < div class = "ttdeci" > void GetAudioSpecificConfig(std::vector< uint8_t > *buffer) const override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d9/dda/ac3__header_8cc_source.html#l00131" > ac3_header.cc:131< / a > < / div > < / div >
2017-12-12 02:14:43 +00:00
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2021-06-22 00:16:40 +00:00
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2017-12-12 02:14:43 +00:00
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