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< title > Shaka Packager SDK: packager/media/formats/mp4/mp4_muxer.cc Source File< / title >
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< li class = "navelem" > < a class = "el" href = "../../dir_3f8eec2fc361645de4b1ec14c19fffc7.html" > packager< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_f99dae54fe7170f791f339b952d5067a.html" > media< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_375ba2cfd8fd5b05c50b92d996b9d386.html" > formats< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_ae142483ff91a68c468a97c037f98d4d.html" > mp4< / a > < / li > < / ul >
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< / div >
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< div class = "header" >
< div class = "headertitle" >
< div class = "title" > mp4_muxer.cc< / div > < / div >
< / div > <!-- header -->
< 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 2014 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/mp4/mp4_muxer.h" < / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < span class = "preprocessor" > #include < algorithm> < / span > < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < span class = "preprocessor" > #include " packager/base/strings/string_number_conversions.h" < / span > < / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < span class = "preprocessor" > #include " packager/base/time/clock.h" < / span > < / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < span class = "preprocessor" > #include " packager/base/time/time.h" < / span > < / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < span class = "preprocessor" > #include " packager/file/file.h" < / span > < / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < span class = "preprocessor" > #include " packager/media/base/aes_encryptor.h" < / span > < / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < span class = "preprocessor" > #include " packager/media/base/audio_stream_info.h" < / span > < / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < span class = "preprocessor" > #include " packager/media/base/fourccs.h" < / span > < / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < span class = "preprocessor" > #include " packager/media/base/key_source.h" < / span > < / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < span class = "preprocessor" > #include " packager/media/base/media_sample.h" < / span > < / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < span class = "preprocessor" > #include " packager/media/base/text_stream_info.h" < / span > < / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < span class = "preprocessor" > #include " packager/media/base/video_stream_info.h" < / span > < / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < span class = "preprocessor" > #include " packager/media/codecs/es_descriptor.h" < / span > < / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   < span class = "preprocessor" > #include " packager/media/event/muxer_listener.h" < / span > < / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   < span class = "preprocessor" > #include " packager/media/formats/mp4/box_definitions.h" < / span > < / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   < span class = "preprocessor" > #include " packager/media/formats/mp4/multi_segment_segmenter.h" < / span > < / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   < span class = "preprocessor" > #include " packager/media/formats/mp4/single_segment_segmenter.h" < / span > < / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   < span class = "preprocessor" > #include " packager/media/formats/ttml/ttml_generator.h" < / span > < / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   < span class = "preprocessor" > #include " packager/status_macros.h" < / span > < / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   < / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   < span class = "keyword" > namespace < / span > < a class = "code" href = "../../d8/daf/namespaceshaka.html" > shaka< / a > {< / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   < span class = "keyword" > namespace < / span > media {< / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   < span class = "keyword" > namespace < / span > mp4 {< / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   < / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   < span class = "keyword" > namespace < / span > {< / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   < / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   < span class = "comment" > // Sets the range start and end value from offset and size.< / span > < / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   < span class = "comment" > // |start| and |end| are for byte-range-spec specified in RFC2616.< / span > < / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   < span class = "keywordtype" > void< / span > SetStartAndEndFromOffsetAndSize(< span class = "keywordtype" > size_t< / span > offset,< / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   < span class = "keywordtype" > size_t< / span > size,< / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   Range* range) {< / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   DCHECK(range);< / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   range-> start = < span class = "keyword" > static_cast< < / span > uint32_t< span class = "keyword" > > < / span > (offset);< / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   < span class = "comment" > // Note that ranges are inclusive. So we need - 1.< / span > < / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   range-> end = range-> start + < span class = "keyword" > static_cast< < / span > uint32_t< span class = "keyword" > > < / span > (size) - 1;< / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   }< / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   < / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   FourCC CodecToFourCC(Codec codec, H26xStreamFormat h26x_stream_format) {< / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   < span class = "keywordflow" > switch< / span > (codec) {< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   < span class = "keywordflow" > case< / span > kCodecAV1:< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   < span class = "keywordflow" > return< / span > FOURCC_av01;< / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   < span class = "keywordflow" > case< / span > kCodecH264:< / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   < span class = "keywordflow" > return< / span > h26x_stream_format ==< / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   H26xStreamFormat::kNalUnitStreamWithParameterSetNalus< / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   ? FOURCC_avc3< / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   : FOURCC_avc1;< / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   < span class = "keywordflow" > case< / span > kCodecH265:< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   < span class = "keywordflow" > return< / span > h26x_stream_format ==< / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   H26xStreamFormat::kNalUnitStreamWithParameterSetNalus< / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   ? FOURCC_hev1< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   : FOURCC_hvc1;< / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   < span class = "keywordflow" > case< / span > kCodecH265DolbyVision:< / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   < span class = "keywordflow" > return< / span > h26x_stream_format ==< / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   H26xStreamFormat::kNalUnitStreamWithParameterSetNalus< / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   ? FOURCC_dvhe< / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   : FOURCC_dvh1;< / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   < span class = "keywordflow" > case< / span > kCodecVP8:< / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   < span class = "keywordflow" > return< / span > FOURCC_vp08;< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   < span class = "keywordflow" > case< / span > kCodecVP9:< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < span class = "keywordflow" > return< / span > FOURCC_vp09;< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   < span class = "keywordflow" > case< / span > kCodecAAC:< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   < span class = "keywordflow" > case< / span > kCodecMP3:< / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   < span class = "keywordflow" > return< / span > FOURCC_mp4a;< / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   < span class = "keywordflow" > case< / span > kCodecAC3:< / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < span class = "keywordflow" > return< / span > FOURCC_ac_3;< / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   < span class = "keywordflow" > case< / span > kCodecDTSC:< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   < span class = "keywordflow" > return< / span > FOURCC_dtsc;< / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   < span class = "keywordflow" > case< / span > kCodecDTSH:< / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   < span class = "keywordflow" > return< / span > FOURCC_dtsh;< / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   < span class = "keywordflow" > case< / span > kCodecDTSL:< / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   < span class = "keywordflow" > return< / span > FOURCC_dtsl;< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   < span class = "keywordflow" > case< / span > kCodecDTSE:< / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   < span class = "keywordflow" > return< / span > FOURCC_dtse;< / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   < span class = "keywordflow" > case< / span > kCodecDTSM:< / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   < span class = "keywordflow" > return< / span > FOURCC_dtsm;< / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   < span class = "keywordflow" > case< / span > kCodecEAC3:< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   < span class = "keywordflow" > return< / span > FOURCC_ec_3;< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   < span class = "keywordflow" > case< / span > kCodecAC4:< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   < span class = "keywordflow" > return< / span > FOURCC_ac_4;< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   < span class = "keywordflow" > case< / span > kCodecFlac:< / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   < span class = "keywordflow" > return< / span > FOURCC_fLaC;< / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   < span class = "keywordflow" > case< / span > kCodecOpus:< / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   < span class = "keywordflow" > return< / span > FOURCC_Opus;< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   < span class = "keywordflow" > return< / span > FOURCC_NULL;< / 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 >   }< / div >
< div class = "line" > < a name = "l00097" > < / a > < span class = "lineno" > 97< / span >   < / div >
< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   < span class = "keywordtype" > void< / span > GenerateSinf(FourCC old_type,< / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   < span class = "keyword" > const< / span > EncryptionConfig& encryption_config,< / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   ProtectionSchemeInfo* sinf) {< / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   sinf-> format.format = old_type;< / div >
< div class = "line" > < a name = "l00102" > < / a > < span class = "lineno" > 102< / span >   < / div >
< div class = "line" > < a name = "l00103" > < / a > < span class = "lineno" > 103< / span >   DCHECK_NE(encryption_config.protection_scheme, FOURCC_NULL);< / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   sinf-> type.type = encryption_config.protection_scheme;< / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   < / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   < span class = "comment" > // The version of cenc implemented here. CENC 4.< / span > < / div >
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > int< / span > kCencSchemeVersion = 0x00010000;< / div >
< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > 108< / span >   sinf-> type.version = kCencSchemeVersion;< / 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 = "keyword" > auto< / span > & track_encryption = sinf-> info.track_encryption;< / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   track_encryption.default_is_protected = 1;< / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   < / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   track_encryption.default_crypt_byte_block =< / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   encryption_config.crypt_byte_block;< / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   track_encryption.default_skip_byte_block = encryption_config.skip_byte_block;< / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   < span class = "keywordflow" > switch< / span > (encryption_config.protection_scheme) {< / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   < span class = "keywordflow" > case< / span > FOURCC_cenc:< / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   < span class = "keywordflow" > case< / span > FOURCC_cbc1:< / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > 119< / span >   DCHECK_EQ(track_encryption.default_crypt_byte_block, 0u);< / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   DCHECK_EQ(track_encryption.default_skip_byte_block, 0u);< / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   < span class = "comment" > // CENCv3 10.1 ‘ ’ ‘ ’ < / span > < / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   < span class = "comment" > // The version of the Track Encryption Box (‘ ’ < / span > < / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   track_encryption.version = 0;< / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > 125< / span >   < span class = "keywordflow" > case< / span > FOURCC_cbcs:< / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   < span class = "keywordflow" > case< / span > FOURCC_cens:< / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   < span class = "comment" > // CENCv3 10.3 ‘ ’ < / span > < / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > 128< / span >   < span class = "comment" > // 10.4 ‘ ’ < / span > < / div >
< div class = "line" > < a name = "l00129" > < / a > < span class = "lineno" > 129< / span >   < span class = "comment" > // The version of the Track Encryption Box (‘ ’ < / span > < / div >
< div class = "line" > < a name = "l00130" > < / a > < span class = "lineno" > 130< / span >   track_encryption.version = 1;< / div >
< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > 131< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00133" > < / a > < span class = "lineno" > 133< / span >   NOTREACHED() < < < span class = "stringliteral" > " Unexpected protection scheme " < / span > < / div >
< div class = "line" > < a name = "l00134" > < / a > < span class = "lineno" > 134< / span >   < < encryption_config.protection_scheme;< / div >
< div class = "line" > < a name = "l00135" > < / a > < span class = "lineno" > 135< / span >   }< / div >
< div class = "line" > < a name = "l00136" > < / a > < span class = "lineno" > 136< / span >   < / div >
< div class = "line" > < a name = "l00137" > < / a > < span class = "lineno" > 137< / span >   track_encryption.default_per_sample_iv_size =< / div >
< div class = "line" > < a name = "l00138" > < / a > < span class = "lineno" > 138< / span >   encryption_config.per_sample_iv_size;< / div >
< div class = "line" > < a name = "l00139" > < / a > < span class = "lineno" > 139< / span >   track_encryption.default_constant_iv = encryption_config.constant_iv;< / div >
< div class = "line" > < a name = "l00140" > < / a > < span class = "lineno" > 140< / span >   track_encryption.default_kid = encryption_config.key_id;< / div >
< div class = "line" > < a name = "l00141" > < / a > < span class = "lineno" > 141< / span >   }< / div >
< div class = "line" > < a name = "l00142" > < / a > < span class = "lineno" > 142< / span >   < / div >
< div class = "line" > < a name = "l00143" > < / a > < span class = "lineno" > 143< / span >   < span class = "comment" > // The roll distance is expressed in sample units and always takes negative< / span > < / div >
< div class = "line" > < a name = "l00144" > < / a > < span class = "lineno" > 144< / span >   < span class = "comment" > // values.< / span > < / div >
< div class = "line" > < a name = "l00145" > < / a > < span class = "lineno" > 145< / span >   int16_t GetRollDistance(uint64_t seek_preroll_ns, uint32_t sampling_frequency) {< / div >
< div class = "line" > < a name = "l00146" > < / a > < span class = "lineno" > 146< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > double< / span > kNanosecondsPerSecond = 1000000000;< / div >
< div class = "line" > < a name = "l00147" > < / a > < span class = "lineno" > 147< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > double< / span > preroll_in_samples =< / div >
< div class = "line" > < a name = "l00148" > < / a > < span class = "lineno" > 148< / span >   seek_preroll_ns / kNanosecondsPerSecond * sampling_frequency;< / div >
< div class = "line" > < a name = "l00149" > < / a > < span class = "lineno" > 149< / span >   < span class = "comment" > // Round to closest integer.< / span > < / div >
< div class = "line" > < a name = "l00150" > < / a > < span class = "lineno" > 150< / span >   < span class = "keywordflow" > return< / span > -< span class = "keyword" > static_cast< < / span > int16_t< span class = "keyword" > > < / span > (preroll_in_samples + 0.5);< / div >
< div class = "line" > < a name = "l00151" > < / a > < span class = "lineno" > 151< / span >   }< / div >
< div class = "line" > < a name = "l00152" > < / a > < span class = "lineno" > 152< / span >   < / div >
< div class = "line" > < a name = "l00153" > < / a > < span class = "lineno" > 153< / span >   } < span class = "comment" > // namespace< / span > < / div >
< div class = "line" > < a name = "l00154" > < / a > < span class = "lineno" > 154< / span >   < / div >
< div class = "line" > < a name = "l00155" > < / a > < span class = "lineno" > < a class = "line" href = "../../db/d30/classshaka_1_1media_1_1mp4_1_1MP4Muxer.html#a5b6a878865250e3e17268c011a361497" > 155< / a > < / span >   < a class = "code" href = "../../db/d30/classshaka_1_1media_1_1mp4_1_1MP4Muxer.html#a5b6a878865250e3e17268c011a361497" > MP4Muxer::MP4Muxer< / a > (< span class = "keyword" > const< / span > < a class = "code" href = "../../d0/d27/structshaka_1_1media_1_1MuxerOptions.html" > MuxerOptions< / a > & options) : < a class = "code" href = "../../df/d46/classshaka_1_1media_1_1Muxer.html" > Muxer< / a > (options) {}< / div >
< div class = "line" > < a name = "l00156" > < / a > < span class = "lineno" > 156< / span >   MP4Muxer::~MP4Muxer() {}< / div >
< div class = "line" > < a name = "l00157" > < / a > < span class = "lineno" > 157< / span >   < / div >
< div class = "line" > < a name = "l00158" > < / a > < span class = "lineno" > 158< / span >   < a class = "code" href = "../../d2/d20/classshaka_1_1Status.html" > Status< / a > MP4Muxer::InitializeMuxer() {< / div >
< div class = "line" > < a name = "l00159" > < / a > < span class = "lineno" > 159< / span >   < span class = "comment" > // Muxer will be delay-initialized after seeing the first sample.< / span > < / div >
< div class = "line" > < a name = "l00160" > < / a > < span class = "lineno" > 160< / span >   to_be_initialized_ = < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00161" > < / a > < span class = "lineno" > 161< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00162" > < / a > < span class = "lineno" > 162< / span >   }< / div >
< div class = "line" > < a name = "l00163" > < / a > < span class = "lineno" > 163< / span >   < / div >
< div class = "line" > < a name = "l00164" > < / a > < span class = "lineno" > 164< / span >   < a class = "code" href = "../../d2/d20/classshaka_1_1Status.html" > Status< / a > MP4Muxer::Finalize() {< / div >
< div class = "line" > < a name = "l00165" > < / a > < span class = "lineno" > 165< / span >   < span class = "comment" > // This happens on streams that are not initialized, i.e. not going through< / span > < / div >
< div class = "line" > < a name = "l00166" > < / a > < span class = "lineno" > 166< / span >   < span class = "comment" > // DelayInitializeMuxer, which can only happen if there are no samples from< / span > < / div >
< div class = "line" > < a name = "l00167" > < / a > < span class = "lineno" > 167< / span >   < span class = "comment" > // the stream.< / span > < / div >
< div class = "line" > < a name = "l00168" > < / a > < span class = "lineno" > 168< / span >   < span class = "keywordflow" > if< / span > (!segmenter_) {< / div >
< div class = "line" > < a name = "l00169" > < / a > < span class = "lineno" > 169< / span >   DCHECK(to_be_initialized_);< / div >
< div class = "line" > < a name = "l00170" > < / a > < span class = "lineno" > 170< / span >   LOG(INFO) < < < span class = "stringliteral" > " Skip stream ' " < / span > < < options().< a class = "code" href = "../../d0/d27/structshaka_1_1media_1_1MuxerOptions.html#a5397ee8759a663aea68261600e528d82" > output_file_name< / a > < / div >
< div class = "line" > < a name = "l00171" > < / a > < span class = "lineno" > 171< / span >   < < < span class = "stringliteral" > " ' which does not contain any sample." < / span > ;< / div >
< div class = "line" > < a name = "l00172" > < / a > < span class = "lineno" > 172< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00173" > < / a > < span class = "lineno" > 173< / span >   }< / div >
< div class = "line" > < a name = "l00174" > < / a > < span class = "lineno" > 174< / span >   < / div >
< div class = "line" > < a name = "l00175" > < / a > < span class = "lineno" > 175< / span >   Status segmenter_finalized = segmenter_-> Finalize();< / div >
< div class = "line" > < a name = "l00176" > < / a > < span class = "lineno" > 176< / span >   < / div >
< div class = "line" > < a name = "l00177" > < / a > < span class = "lineno" > 177< / span >   < span class = "keywordflow" > if< / span > (!segmenter_finalized.ok())< / div >
< div class = "line" > < a name = "l00178" > < / a > < span class = "lineno" > 178< / span >   < span class = "keywordflow" > return< / span > segmenter_finalized;< / div >
< div class = "line" > < a name = "l00179" > < / a > < span class = "lineno" > 179< / span >   < / div >
< div class = "line" > < a name = "l00180" > < / a > < span class = "lineno" > 180< / span >   FireOnMediaEndEvent();< / div >
< div class = "line" > < a name = "l00181" > < / a > < span class = "lineno" > 181< / span >   LOG(INFO) < < < span class = "stringliteral" > " MP4 file ' " < / span > < < options().< a class = "code" href = "../../d0/d27/structshaka_1_1media_1_1MuxerOptions.html#a5397ee8759a663aea68261600e528d82" > output_file_name< / a > < < < span class = "stringliteral" > " ' finalized." < / span > ;< / div >
< div class = "line" > < a name = "l00182" > < / a > < span class = "lineno" > 182< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00183" > < / a > < span class = "lineno" > 183< / span >   }< / 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 >   Status MP4Muxer::AddMediaSample(< span class = "keywordtype" > size_t< / span > stream_id, < span class = "keyword" > const< / span > MediaSample& sample) {< / div >
< div class = "line" > < a name = "l00186" > < / a > < span class = "lineno" > 186< / span >   < span class = "keywordflow" > if< / span > (to_be_initialized_) {< / div >
< div class = "line" > < a name = "l00187" > < / a > < span class = "lineno" > 187< / span >   RETURN_IF_ERROR(UpdateEditListOffsetFromSample(sample));< / div >
< div class = "line" > < a name = "l00188" > < / a > < span class = "lineno" > 188< / span >   RETURN_IF_ERROR(DelayInitializeMuxer());< / div >
< div class = "line" > < a name = "l00189" > < / a > < span class = "lineno" > 189< / span >   to_be_initialized_ = < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00190" > < / a > < span class = "lineno" > 190< / span >   }< / div >
< div class = "line" > < a name = "l00191" > < / a > < span class = "lineno" > 191< / span >   DCHECK(segmenter_);< / div >
< div class = "line" > < a name = "l00192" > < / a > < span class = "lineno" > 192< / span >   < span class = "keywordflow" > return< / span > segmenter_-> AddSample(stream_id, sample);< / div >
< div class = "line" > < a name = "l00193" > < / a > < span class = "lineno" > 193< / span >   }< / div >
< div class = "line" > < a name = "l00194" > < / a > < span class = "lineno" > 194< / span >   < / div >
< div class = "line" > < a name = "l00195" > < / a > < span class = "lineno" > 195< / span >   Status MP4Muxer::FinalizeSegment(< span class = "keywordtype" > size_t< / span > stream_id,< / div >
< div class = "line" > < a name = "l00196" > < / a > < span class = "lineno" > 196< / span >   < span class = "keyword" > const< / span > SegmentInfo& segment_info) {< / div >
< div class = "line" > < a name = "l00197" > < / a > < span class = "lineno" > 197< / span >   DCHECK(segmenter_);< / div >
< div class = "line" > < a name = "l00198" > < / a > < span class = "lineno" > 198< / span >   VLOG(3) < < < span class = "stringliteral" > " Finalizing " < / span > < < (segment_info.is_subsegment ? < span class = "stringliteral" > " sub" < / span > : < span class = "stringliteral" > " " < / span > )< / div >
< div class = "line" > < a name = "l00199" > < / a > < span class = "lineno" > 199< / span >   < < < span class = "stringliteral" > " segment " < / span > < < segment_info.start_timestamp < < < span class = "stringliteral" > " duration " < / span > < / div >
< div class = "line" > < a name = "l00200" > < / a > < span class = "lineno" > 200< / span >   < < segment_info.duration;< / div >
< div class = "line" > < a name = "l00201" > < / a > < span class = "lineno" > 201< / span >   < span class = "keywordflow" > return< / span > segmenter_-> FinalizeSegment(stream_id, segment_info);< / 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 >   < / div >
< div class = "line" > < a name = "l00204" > < / a > < span class = "lineno" > 204< / span >   Status MP4Muxer::DelayInitializeMuxer() {< / div >
< div class = "line" > < a name = "l00205" > < / a > < span class = "lineno" > 205< / span >   DCHECK(!streams().empty());< / div >
< div class = "line" > < a name = "l00206" > < / a > < span class = "lineno" > 206< / span >   < / div >
< div class = "line" > < a name = "l00207" > < / a > < span class = "lineno" > 207< / span >   std::unique_ptr< FileType> ftyp(< span class = "keyword" > new< / span > FileType);< / div >
< div class = "line" > < a name = "l00208" > < / a > < span class = "lineno" > 208< / span >   std::unique_ptr< Movie> moov(< span class = "keyword" > new< / span > Movie);< / div >
< div class = "line" > < a name = "l00209" > < / a > < span class = "lineno" > 209< / span >   < / div >
< div class = "line" > < a name = "l00210" > < / a > < span class = "lineno" > 210< / span >   ftyp-> major_brand = FOURCC_mp41;< / div >
< div class = "line" > < a name = "l00211" > < / a > < span class = "lineno" > 211< / span >   ftyp-> compatible_brands.push_back(FOURCC_iso8);< / div >
< div class = "line" > < a name = "l00212" > < / a > < span class = "lineno" > 212< / span >   ftyp-> compatible_brands.push_back(FOURCC_isom);< / div >
< div class = "line" > < a name = "l00213" > < / a > < span class = "lineno" > 213< / span >   ftyp-> compatible_brands.push_back(FOURCC_mp41);< / div >
< div class = "line" > < a name = "l00214" > < / a > < span class = "lineno" > 214< / span >   ftyp-> compatible_brands.push_back(FOURCC_dash);< / div >
< div class = "line" > < a name = "l00215" > < / a > < span class = "lineno" > 215< / span >   < / div >
< div class = "line" > < a name = "l00216" > < / a > < span class = "lineno" > 216< / span >   < span class = "keywordflow" > if< / span > (streams().size() == 1) {< / div >
< div class = "line" > < a name = "l00217" > < / a > < span class = "lineno" > 217< / span >   FourCC codec_fourcc = FOURCC_NULL;< / div >
< div class = "line" > < a name = "l00218" > < / a > < span class = "lineno" > 218< / span >   < span class = "keywordflow" > if< / span > (streams()[0]-> stream_type() == kStreamVideo) {< / div >
< div class = "line" > < a name = "l00219" > < / a > < span class = "lineno" > 219< / span >   codec_fourcc =< / div >
< div class = "line" > < a name = "l00220" > < / a > < span class = "lineno" > 220< / span >   CodecToFourCC(streams()[0]-> codec(),< / div >
< div class = "line" > < a name = "l00221" > < / a > < span class = "lineno" > 221< / span >   < span class = "keyword" > static_cast< < / span > < span class = "keyword" > const < / span > VideoStreamInfo*< span class = "keyword" > > < / span > (streams()[0].get())< / div >
< div class = "line" > < a name = "l00222" > < / a > < span class = "lineno" > 222< / span >   -> h26x_stream_format());< / div >
< div class = "line" > < a name = "l00223" > < / a > < span class = "lineno" > 223< / span >   < span class = "keywordflow" > if< / span > (codec_fourcc != FOURCC_NULL)< / div >
< div class = "line" > < a name = "l00224" > < / a > < span class = "lineno" > 224< / span >   ftyp-> compatible_brands.push_back(codec_fourcc);< / div >
< div class = "line" > < a name = "l00225" > < / a > < span class = "lineno" > 225< / span >   }< / div >
< div class = "line" > < a name = "l00226" > < / a > < span class = "lineno" > 226< / span >   < / div >
< div class = "line" > < a name = "l00227" > < / a > < span class = "lineno" > 227< / span >   < span class = "comment" > // CMAF allows only one track/stream per file.< / span > < / div >
< div class = "line" > < a name = "l00228" > < / a > < span class = "lineno" > 228< / span >   < span class = "comment" > // CMAF requires single initialization switching for AVC3/HEV1, which is not< / span > < / div >
< div class = "line" > < a name = "l00229" > < / a > < span class = "lineno" > 229< / span >   < span class = "comment" > // supported yet.< / span > < / div >
< div class = "line" > < a name = "l00230" > < / a > < span class = "lineno" > 230< / span >   < span class = "keywordflow" > if< / span > (codec_fourcc != FOURCC_avc3 & & codec_fourcc != FOURCC_hev1)< / div >
< div class = "line" > < a name = "l00231" > < / a > < span class = "lineno" > 231< / span >   ftyp-> compatible_brands.push_back(FOURCC_cmfc);< / div >
< div class = "line" > < a name = "l00232" > < / a > < span class = "lineno" > 232< / span >   }< / div >
< div class = "line" > < a name = "l00233" > < / a > < span class = "lineno" > 233< / span >   < / div >
< div class = "line" > < a name = "l00234" > < / a > < span class = "lineno" > 234< / span >   moov-> header.creation_time = IsoTimeNow();< / div >
< div class = "line" > < a name = "l00235" > < / a > < span class = "lineno" > 235< / span >   moov-> header.modification_time = IsoTimeNow();< / div >
< div class = "line" > < a name = "l00236" > < / a > < span class = "lineno" > 236< / span >   moov-> header.next_track_id = < span class = "keyword" > static_cast< < / span > uint32_t< span class = "keyword" > > < / span > (streams().size()) + 1;< / div >
< div class = "line" > < a name = "l00237" > < / a > < span class = "lineno" > 237< / span >   < / div >
< div class = "line" > < a name = "l00238" > < / a > < span class = "lineno" > 238< / span >   moov-> tracks.resize(streams().size());< / div >
< div class = "line" > < a name = "l00239" > < / a > < span class = "lineno" > 239< / span >   moov-> extends.tracks.resize(streams().size());< / div >
< div class = "line" > < a name = "l00240" > < / a > < span class = "lineno" > 240< / span >   < / div >
< div class = "line" > < a name = "l00241" > < / a > < span class = "lineno" > 241< / span >   < span class = "comment" > // Initialize tracks.< / span > < / div >
< div class = "line" > < a name = "l00242" > < / a > < span class = "lineno" > 242< / span >   < span class = "keywordflow" > for< / span > (uint32_t i = 0; i < streams().size(); ++i) {< / div >
< div class = "line" > < a name = "l00243" > < / a > < span class = "lineno" > 243< / span >   < span class = "keyword" > const< / span > StreamInfo* stream = streams()[i].get();< / div >
< div class = "line" > < a name = "l00244" > < / a > < span class = "lineno" > 244< / span >   Track& trak = moov-> tracks[i];< / div >
< div class = "line" > < a name = "l00245" > < / a > < span class = "lineno" > 245< / span >   trak.header.track_id = i + 1;< / div >
< div class = "line" > < a name = "l00246" > < / a > < span class = "lineno" > 246< / span >   < / div >
< div class = "line" > < a name = "l00247" > < / a > < span class = "lineno" > 247< / span >   TrackExtends& trex = moov-> extends.tracks[i];< / div >
< div class = "line" > < a name = "l00248" > < / a > < span class = "lineno" > 248< / span >   trex.track_id = trak.header.track_id;< / div >
< div class = "line" > < a name = "l00249" > < / a > < span class = "lineno" > 249< / span >   trex.default_sample_description_index = 1;< / div >
< div class = "line" > < a name = "l00250" > < / a > < span class = "lineno" > 250< / span >   < / div >
< div class = "line" > < a name = "l00251" > < / a > < span class = "lineno" > 251< / span >   < span class = "keywordtype" > bool< / span > generate_trak_result = < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00252" > < / a > < span class = "lineno" > 252< / span >   < span class = "keywordflow" > switch< / span > (stream-> stream_type()) {< / div >
< div class = "line" > < a name = "l00253" > < / a > < span class = "lineno" > 253< / span >   < span class = "keywordflow" > case< / span > kStreamVideo:< / div >
< div class = "line" > < a name = "l00254" > < / a > < span class = "lineno" > 254< / span >   generate_trak_result = GenerateVideoTrak(< / div >
< div class = "line" > < a name = "l00255" > < / a > < span class = "lineno" > 255< / span >   < span class = "keyword" > static_cast< < / span > < span class = "keyword" > const < / span > VideoStreamInfo*< span class = "keyword" > > < / span > (stream), & trak);< / div >
< div class = "line" > < a name = "l00256" > < / a > < span class = "lineno" > 256< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00257" > < / a > < span class = "lineno" > 257< / span >   < span class = "keywordflow" > case< / span > kStreamAudio:< / div >
< div class = "line" > < a name = "l00258" > < / a > < span class = "lineno" > 258< / span >   generate_trak_result = GenerateAudioTrak(< / div >
< div class = "line" > < a name = "l00259" > < / a > < span class = "lineno" > 259< / span >   < span class = "keyword" > static_cast< < / span > < span class = "keyword" > const < / span > AudioStreamInfo*< span class = "keyword" > > < / span > (stream), & trak);< / div >
< div class = "line" > < a name = "l00260" > < / a > < span class = "lineno" > 260< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00261" > < / a > < span class = "lineno" > 261< / span >   < span class = "keywordflow" > case< / span > kStreamText:< / div >
< div class = "line" > < a name = "l00262" > < / a > < span class = "lineno" > 262< / span >   generate_trak_result = GenerateTextTrak(< / div >
< div class = "line" > < a name = "l00263" > < / a > < span class = "lineno" > 263< / span >   < span class = "keyword" > static_cast< < / span > < span class = "keyword" > const < / span > TextStreamInfo*< span class = "keyword" > > < / span > (stream), & trak);< / div >
< div class = "line" > < a name = "l00264" > < / a > < span class = "lineno" > 264< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00265" > < / a > < span class = "lineno" > 265< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00266" > < / a > < span class = "lineno" > 266< / span >   NOTIMPLEMENTED() < < < span class = "stringliteral" > " Not implemented for stream type: " < / span > < / div >
< div class = "line" > < a name = "l00267" > < / a > < span class = "lineno" > 267< / span >   < < stream-> stream_type();< / div >
< div class = "line" > < a name = "l00268" > < / a > < span class = "lineno" > 268< / span >   }< / div >
< div class = "line" > < a name = "l00269" > < / a > < span class = "lineno" > 269< / span >   < span class = "keywordflow" > if< / span > (!generate_trak_result)< / div >
< div class = "line" > < a name = "l00270" > < / a > < span class = "lineno" > 270< / span >   < span class = "keywordflow" > return< / span > Status(error::MUXER_FAILURE, < span class = "stringliteral" > " Failed to generate trak." < / span > );< / div >
< div class = "line" > < a name = "l00271" > < / a > < span class = "lineno" > 271< / span >   < / div >
< div class = "line" > < a name = "l00272" > < / a > < span class = "lineno" > 272< / span >   < span class = "comment" > // Generate EditList if needed. See UpdateEditListOffsetFromSample() for< / span > < / div >
< div class = "line" > < a name = "l00273" > < / a > < span class = "lineno" > 273< / span >   < span class = "comment" > // more information.< / span > < / div >
< div class = "line" > < a name = "l00274" > < / a > < span class = "lineno" > 274< / span >   < span class = "keywordflow" > if< / span > (edit_list_offset_.value() > 0) {< / div >
< div class = "line" > < a name = "l00275" > < / a > < span class = "lineno" > 275< / span >   EditListEntry entry;< / div >
< div class = "line" > < a name = "l00276" > < / a > < span class = "lineno" > 276< / span >   entry.media_time = edit_list_offset_.value();< / div >
< div class = "line" > < a name = "l00277" > < / a > < span class = "lineno" > 277< / span >   entry.media_rate_integer = 1;< / div >
< div class = "line" > < a name = "l00278" > < / a > < span class = "lineno" > 278< / span >   trak.edit.list.edits.push_back(entry);< / div >
< div class = "line" > < a name = "l00279" > < / a > < span class = "lineno" > 279< / span >   }< / div >
< div class = "line" > < a name = "l00280" > < / a > < span class = "lineno" > 280< / span >   < / div >
< div class = "line" > < a name = "l00281" > < / a > < span class = "lineno" > 281< / span >   < span class = "keywordflow" > if< / span > (stream-> is_encrypted() & & options().mp4_params.include_pssh_in_stream) {< / div >
< div class = "line" > < a name = "l00282" > < / a > < span class = "lineno" > 282< / span >   moov-> pssh.clear();< / div >
< div class = "line" > < a name = "l00283" > < / a > < span class = "lineno" > 283< / span >   < span class = "keyword" > const< / span > < span class = "keyword" > auto< / span > & key_system_info = stream-> encryption_config().key_system_info;< / div >
< div class = "line" > < a name = "l00284" > < / a > < span class = "lineno" > 284< / span >   < span class = "keywordflow" > for< / span > (< span class = "keyword" > const< / span > ProtectionSystemSpecificInfo& system : key_system_info) {< / div >
< div class = "line" > < a name = "l00285" > < / a > < span class = "lineno" > 285< / span >   < span class = "keywordflow" > if< / span > (system.psshs.empty())< / div >
< div class = "line" > < a name = "l00286" > < / a > < span class = "lineno" > 286< / span >   < span class = "keywordflow" > continue< / span > ;< / div >
< div class = "line" > < a name = "l00287" > < / a > < span class = "lineno" > 287< / span >   ProtectionSystemSpecificHeader pssh;< / div >
< div class = "line" > < a name = "l00288" > < / a > < span class = "lineno" > 288< / span >   pssh.raw_box = system.psshs;< / div >
< div class = "line" > < a name = "l00289" > < / a > < span class = "lineno" > 289< / span >   moov-> pssh.push_back(pssh);< / div >
< div class = "line" > < a name = "l00290" > < / a > < span class = "lineno" > 290< / span >   }< / div >
< div class = "line" > < a name = "l00291" > < / a > < span class = "lineno" > 291< / span >   }< / div >
< div class = "line" > < a name = "l00292" > < / a > < span class = "lineno" > 292< / span >   }< / div >
< div class = "line" > < a name = "l00293" > < / a > < span class = "lineno" > 293< / span >   < / div >
< div class = "line" > < a name = "l00294" > < / a > < span class = "lineno" > 294< / span >   < span class = "keywordflow" > if< / span > (options().segment_template.empty()) {< / div >
< div class = "line" > < a name = "l00295" > < / a > < span class = "lineno" > 295< / span >   segmenter_.reset(< span class = "keyword" > new< / span > SingleSegmentSegmenter(options(), std::move(ftyp),< / div >
< div class = "line" > < a name = "l00296" > < / a > < span class = "lineno" > 296< / span >   std::move(moov)));< / div >
< div class = "line" > < a name = "l00297" > < / a > < span class = "lineno" > 297< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00298" > < / a > < span class = "lineno" > 298< / span >   segmenter_.reset(< / div >
< div class = "line" > < a name = "l00299" > < / a > < span class = "lineno" > 299< / span >   < span class = "keyword" > new< / span > MultiSegmentSegmenter(options(), std::move(ftyp), std::move(moov)));< / div >
< div class = "line" > < a name = "l00300" > < / a > < span class = "lineno" > 300< / span >   }< / div >
< div class = "line" > < a name = "l00301" > < / a > < span class = "lineno" > 301< / span >   < / div >
< div class = "line" > < a name = "l00302" > < / a > < span class = "lineno" > 302< / span >   < span class = "keyword" > const< / span > Status segmenter_initialized =< / div >
< div class = "line" > < a name = "l00303" > < / a > < span class = "lineno" > 303< / span >   segmenter_-> Initialize(streams(), muxer_listener(), progress_listener());< / div >
< div class = "line" > < a name = "l00304" > < / a > < span class = "lineno" > 304< / span >   < span class = "keywordflow" > if< / span > (!segmenter_initialized.ok())< / div >
< div class = "line" > < a name = "l00305" > < / a > < span class = "lineno" > 305< / span >   < span class = "keywordflow" > return< / span > segmenter_initialized;< / div >
< div class = "line" > < a name = "l00306" > < / a > < span class = "lineno" > 306< / span >   < / div >
< div class = "line" > < a name = "l00307" > < / a > < span class = "lineno" > 307< / span >   FireOnMediaStartEvent();< / div >
< div class = "line" > < a name = "l00308" > < / a > < span class = "lineno" > 308< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00309" > < / a > < span class = "lineno" > 309< / span >   }< / div >
< div class = "line" > < a name = "l00310" > < / a > < span class = "lineno" > 310< / span >   < / div >
< div class = "line" > < a name = "l00311" > < / a > < span class = "lineno" > 311< / span >   Status MP4Muxer::UpdateEditListOffsetFromSample(< span class = "keyword" > const< / span > MediaSample& sample) {< / div >
< div class = "line" > < a name = "l00312" > < / a > < span class = "lineno" > 312< / span >   < span class = "keywordflow" > if< / span > (edit_list_offset_)< / div >
< div class = "line" > < a name = "l00313" > < / a > < span class = "lineno" > 313< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00314" > < / a > < span class = "lineno" > 314< / span >   < / div >
< div class = "line" > < a name = "l00315" > < / a > < span class = "lineno" > 315< / span >   < span class = "keyword" > const< / span > int64_t pts = sample.pts();< / div >
< div class = "line" > < a name = "l00316" > < / a > < span class = "lineno" > 316< / span >   < span class = "keyword" > const< / span > int64_t dts = sample.dts();< / div >
< div class = "line" > < a name = "l00317" > < / a > < span class = "lineno" > 317< / span >   < span class = "comment" > // An EditList entry is inserted if one of the below conditions occur [4]:< / span > < / div >
< div class = "line" > < a name = "l00318" > < / a > < span class = "lineno" > 318< / span >   < span class = "comment" > // (1) pts > dts for the first sample. Due to Chrome' s dts bug [1], dts is< / span > < / div >
< div class = "line" > < a name = "l00319" > < / a > < span class = "lineno" > 319< / span >   < span class = "comment" > // used in buffered range API, while pts is used elsewhere (players,< / span > < / div >
< div class = "line" > < a name = "l00320" > < / a > < span class = "lineno" > 320< / span >   < span class = "comment" > // manifests, and Chrome' s own appendWindow check etc.), this< / span > < / div >
< div class = "line" > < a name = "l00321" > < / a > < span class = "lineno" > 321< / span >   < span class = "comment" > // inconsistency creates various problems, including possible stalls< / span > < / div >
< div class = "line" > < a name = "l00322" > < / a > < span class = "lineno" > 322< / span >   < span class = "comment" > // during playback. Since Chrome adjusts pts only when seeing EditList< / span > < / div >
< div class = "line" > < a name = "l00323" > < / a > < span class = "lineno" > 323< / span >   < span class = "comment" > // [2], we can insert an EditList with the time equal to difference of pts< / span > < / div >
< div class = "line" > < a name = "l00324" > < / a > < span class = "lineno" > 324< / span >   < span class = "comment" > // and dts to make aligned buffered ranges using pts and dts. This< / span > < / div >
< div class = "line" > < a name = "l00325" > < / a > < span class = "lineno" > 325< / span >   < span class = "comment" > // effectively workarounds the dts bug. It is also recommended by ISO-BMFF< / span > < / div >
< div class = "line" > < a name = "l00326" > < / a > < span class = "lineno" > 326< / span >   < span class = "comment" > // specification [3].< / span > < / div >
< div class = "line" > < a name = "l00327" > < / a > < span class = "lineno" > 327< / span >   < span class = "comment" > // (2) pts == dts and with pts < 0. This happens for some audio codecs where a< / span > < / div >
< div class = "line" > < a name = "l00328" > < / a > < span class = "lineno" > 328< / span >   < span class = "comment" > // negative presentation timestamp signals that the sample is not supposed< / span > < / div >
< div class = "line" > < a name = "l00329" > < / a > < span class = "lineno" > 329< / span >   < span class = "comment" > // to be shown, i.e. for audio priming. EditList is needed to encode< / span > < / div >
< div class = "line" > < a name = "l00330" > < / a > < span class = "lineno" > 330< / span >   < span class = "comment" > // negative timestamps.< / span > < / div >
< div class = "line" > < a name = "l00331" > < / a > < span class = "lineno" > 331< / span >   < span class = "comment" > // [1] https://crbug.com/718641, fixed but behind MseBufferByPts, still not< / span > < / div >
< div class = "line" > < a name = "l00332" > < / a > < span class = "lineno" > 332< / span >   < span class = "comment" > // enabled as of M67.< / span > < / div >
< div class = "line" > < a name = "l00333" > < / a > < span class = "lineno" > 333< / span >   < span class = "comment" > // [2] This is actually a bug, see https://crbug.com/354518. It looks like< / span > < / div >
< div class = "line" > < a name = "l00334" > < / a > < span class = "lineno" > 334< / span >   < span class = "comment" > // Chrome is planning to enable the fix for [1] before addressing this< / span > < / div >
< div class = "line" > < a name = "l00335" > < / a > < span class = "lineno" > 335< / span >   < span class = "comment" > // bug, so we are safe.< / span > < / div >
< div class = "line" > < a name = "l00336" > < / a > < span class = "lineno" > 336< / span >   < span class = "comment" > // [3] ISO 14496-12:2015 8.6.6.1< / span > < / div >
< div class = "line" > < a name = "l00337" > < / a > < span class = "lineno" > 337< / span >   < span class = "comment" > // It is recommended that such an edit be used to establish a presentation< / span > < / div >
< div class = "line" > < a name = "l00338" > < / a > < span class = "lineno" > 338< / span >   < span class = "comment" > // time of 0 for the first presented sample, when composition offsets are< / span > < / div >
< div class = "line" > < a name = "l00339" > < / a > < span class = "lineno" > 339< / span >   < span class = "comment" > // used.< / span > < / div >
< div class = "line" > < a name = "l00340" > < / a > < span class = "lineno" > 340< / span >   < span class = "comment" > // [4] ISO 23009-19:2018 7.5.13< / span > < / div >
< div class = "line" > < a name = "l00341" > < / a > < span class = "lineno" > 341< / span >   < span class = "comment" > // In two cases, an EditBox containing a single EditListBox with the< / span > < / div >
< div class = "line" > < a name = "l00342" > < / a > < span class = "lineno" > 342< / span >   < span class = "comment" > // following constraints may be present in the CMAF header of a CMAF track< / span > < / div >
< div class = "line" > < a name = "l00343" > < / a > < span class = "lineno" > 343< / span >   < span class = "comment" > // to adjust the presentation time of all media samples in the CMAF track.< / span > < / div >
< div class = "line" > < a name = "l00344" > < / a > < span class = "lineno" > 344< / span >   < span class = "comment" > // a) The first case is a video CMAF track file using v0 TrackRunBoxes< / span > < / div >
< div class = "line" > < a name = "l00345" > < / a > < span class = "lineno" > 345< / span >   < span class = "comment" > // with positive composition offsets to reorder video media samples.< / span > < / div >
< div class = "line" > < a name = "l00346" > < / a > < span class = "lineno" > 346< / span >   < span class = "comment" > // b) The second case is an audio CMAF track where each media sample' s< / span > < / div >
< div class = "line" > < a name = "l00347" > < / a > < span class = "lineno" > 347< / span >   < span class = "comment" > // presentation time does not equal its composition time.< / span > < / div >
< div class = "line" > < a name = "l00348" > < / a > < span class = "lineno" > 348< / span >   < span class = "keyword" > const< / span > int64_t pts_dts_offset = pts - dts;< / div >
< div class = "line" > < a name = "l00349" > < / a > < span class = "lineno" > 349< / span >   < span class = "keywordflow" > if< / span > (pts_dts_offset > 0) {< / div >
< div class = "line" > < a name = "l00350" > < / a > < span class = "lineno" > 350< / span >   < span class = "keywordflow" > if< / span > (pts < 0) {< / div >
< div class = "line" > < a name = "l00351" > < / a > < span class = "lineno" > 351< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Negative presentation timestamp (" < / span > < < pts< / div >
< div class = "line" > < a name = "l00352" > < / a > < span class = "lineno" > 352< / span >   < < < span class = "stringliteral" > " ) is not supported when there is an offset between " < / span > < / div >
< div class = "line" > < a name = "l00353" > < / a > < span class = "lineno" > 353< / span >   < span class = "stringliteral" > " presentation timestamp and decoding timestamp (" < / span > < / div >
< div class = "line" > < a name = "l00354" > < / a > < span class = "lineno" > 354< / span >   < < dts < < < span class = "stringliteral" > " )." < / span > ;< / div >
< div class = "line" > < a name = "l00355" > < / a > < span class = "lineno" > 355< / span >   < span class = "keywordflow" > return< / span > Status(error::MUXER_FAILURE,< / div >
< div class = "line" > < a name = "l00356" > < / a > < span class = "lineno" > 356< / span >   < span class = "stringliteral" > " Unsupported negative pts when there is an offset between " < / span > < / div >
< div class = "line" > < a name = "l00357" > < / a > < span class = "lineno" > 357< / span >   < span class = "stringliteral" > " pts and dts." < / span > );< / div >
< div class = "line" > < a name = "l00358" > < / a > < span class = "lineno" > 358< / span >   }< / div >
< div class = "line" > < a name = "l00359" > < / a > < span class = "lineno" > 359< / span >   edit_list_offset_ = pts_dts_offset;< / div >
< div class = "line" > < a name = "l00360" > < / a > < span class = "lineno" > 360< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / 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" > if< / span > (pts_dts_offset < 0) {< / div >
< div class = "line" > < a name = "l00363" > < / a > < span class = "lineno" > 363< / span >   LOG(ERROR) < < < span class = "stringliteral" > " presentation timestamp (" < / span > < < pts< / div >
< div class = "line" > < a name = "l00364" > < / a > < span class = "lineno" > 364< / span >   < < < span class = "stringliteral" > " ) is not supposed to be greater than decoding timestamp (" < / span > < / div >
< div class = "line" > < a name = "l00365" > < / a > < span class = "lineno" > 365< / span >   < < dts < < < span class = "stringliteral" > " )." < / span > ;< / div >
< div class = "line" > < a name = "l00366" > < / a > < span class = "lineno" > 366< / span >   < span class = "keywordflow" > return< / span > Status(error::MUXER_FAILURE, < span class = "stringliteral" > " Not expecting pts < dts." < / span > );< / div >
< div class = "line" > < a name = "l00367" > < / a > < span class = "lineno" > 367< / span >   }< / div >
< div class = "line" > < a name = "l00368" > < / a > < span class = "lineno" > 368< / span >   edit_list_offset_ = std::max(-sample.pts(), < span class = "keyword" > static_cast< < / span > int64_t< span class = "keyword" > > < / span > (0));< / div >
< div class = "line" > < a name = "l00369" > < / a > < span class = "lineno" > 369< / span >   < span class = "keywordflow" > return< / span > Status::OK;< / div >
< div class = "line" > < a name = "l00370" > < / a > < span class = "lineno" > 370< / span >   }< / div >
< div class = "line" > < a name = "l00371" > < / a > < span class = "lineno" > 371< / span >   < / div >
< div class = "line" > < a name = "l00372" > < / a > < span class = "lineno" > 372< / span >   < span class = "keywordtype" > void< / span > MP4Muxer::InitializeTrak(< span class = "keyword" > const< / span > StreamInfo* info, Track* trak) {< / div >
< div class = "line" > < a name = "l00373" > < / a > < span class = "lineno" > 373< / span >   int64_t now = IsoTimeNow();< / div >
< div class = "line" > < a name = "l00374" > < / a > < span class = "lineno" > 374< / span >   trak-> header.creation_time = now;< / div >
< div class = "line" > < a name = "l00375" > < / a > < span class = "lineno" > 375< / span >   trak-> header.modification_time = now;< / div >
< div class = "line" > < a name = "l00376" > < / a > < span class = "lineno" > 376< / span >   trak-> header.duration = 0;< / div >
< div class = "line" > < a name = "l00377" > < / a > < span class = "lineno" > 377< / span >   trak-> media.header.creation_time = now;< / div >
< div class = "line" > < a name = "l00378" > < / a > < span class = "lineno" > 378< / span >   trak-> media.header.modification_time = now;< / div >
< div class = "line" > < a name = "l00379" > < / a > < span class = "lineno" > 379< / span >   trak-> media.header.timescale = info-> time_scale();< / div >
< div class = "line" > < a name = "l00380" > < / a > < span class = "lineno" > 380< / span >   trak-> media.header.duration = 0;< / div >
< div class = "line" > < a name = "l00381" > < / a > < span class = "lineno" > 381< / span >   < span class = "keywordflow" > if< / span > (!info-> language().empty()) {< / div >
< div class = "line" > < a name = "l00382" > < / a > < span class = "lineno" > 382< / span >   < span class = "comment" > // Strip off the subtag, if any.< / span > < / div >
< div class = "line" > < a name = "l00383" > < / a > < span class = "lineno" > 383< / span >   std::string main_language = info-> language();< / div >
< div class = "line" > < a name = "l00384" > < / a > < span class = "lineno" > 384< / span >   < span class = "keywordtype" > size_t< / span > dash = main_language.find(< span class = "charliteral" > ' -' < / span > );< / div >
< div class = "line" > < a name = "l00385" > < / a > < span class = "lineno" > 385< / span >   < span class = "keywordflow" > if< / span > (dash != std::string::npos) {< / div >
< div class = "line" > < a name = "l00386" > < / a > < span class = "lineno" > 386< / span >   main_language.erase(dash);< / 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 >   < / div >
< div class = "line" > < a name = "l00389" > < / a > < span class = "lineno" > 389< / span >   < span class = "comment" > // ISO-639-2/T main language code should be 3 characters.< / span > < / div >
< div class = "line" > < a name = "l00390" > < / a > < span class = "lineno" > 390< / span >   < span class = "keywordflow" > if< / span > (main_language.size() != 3) {< / div >
< div class = "line" > < a name = "l00391" > < / a > < span class = "lineno" > 391< / span >   LOG(WARNING) < < < span class = "stringliteral" > " ' " < / span > < < main_language < < < span class = "stringliteral" > " ' is not a valid ISO-639-2 " < / span > < / div >
< div class = "line" > < a name = "l00392" > < / a > < span class = "lineno" > 392< / span >   < < < span class = "stringliteral" > " language code, ignoring." < / span > ;< / div >
< div class = "line" > < a name = "l00393" > < / a > < span class = "lineno" > 393< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00394" > < / a > < span class = "lineno" > 394< / span >   trak-> media.header.language.code = main_language;< / 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 >   }< / div >
< div class = "line" > < a name = "l00397" > < / a > < span class = "lineno" > 397< / span >   }< / div >
< div class = "line" > < a name = "l00398" > < / a > < span class = "lineno" > 398< / span >   < / div >
< div class = "line" > < a name = "l00399" > < / a > < span class = "lineno" > 399< / span >   < span class = "keywordtype" > bool< / span > MP4Muxer::GenerateVideoTrak(< span class = "keyword" > const< / span > VideoStreamInfo* video_info,< / div >
< div class = "line" > < a name = "l00400" > < / a > < span class = "lineno" > 400< / span >   Track* trak) {< / div >
< div class = "line" > < a name = "l00401" > < / a > < span class = "lineno" > 401< / span >   InitializeTrak(video_info, trak);< / div >
< div class = "line" > < a name = "l00402" > < / a > < span class = "lineno" > 402< / span >   < / div >
< div class = "line" > < a name = "l00403" > < / a > < span class = "lineno" > 403< / span >   < span class = "comment" > // width and height specify the track' s visual presentation size as< / span > < / div >
< div class = "line" > < a name = "l00404" > < / a > < span class = "lineno" > 404< / span >   < span class = "comment" > // fixed-point 16.16 values.< / span > < / div >
< div class = "line" > < a name = "l00405" > < / a > < span class = "lineno" > 405< / span >   uint32_t pixel_width = video_info-> pixel_width();< / div >
< div class = "line" > < a name = "l00406" > < / a > < span class = "lineno" > 406< / span >   uint32_t pixel_height = video_info-> pixel_height();< / div >
< div class = "line" > < a name = "l00407" > < / a > < span class = "lineno" > 407< / span >   < span class = "keywordflow" > if< / span > (pixel_width == 0 || pixel_height == 0) {< / div >
< div class = "line" > < a name = "l00408" > < / a > < span class = "lineno" > 408< / span >   LOG(WARNING) < < < span class = "stringliteral" > " pixel width/height are not set. Assuming 1:1." < / span > ;< / div >
< div class = "line" > < a name = "l00409" > < / a > < span class = "lineno" > 409< / span >   pixel_width = 1;< / div >
< div class = "line" > < a name = "l00410" > < / a > < span class = "lineno" > 410< / span >   pixel_height = 1;< / div >
< div class = "line" > < a name = "l00411" > < / a > < span class = "lineno" > 411< / span >   }< / div >
< div class = "line" > < a name = "l00412" > < / a > < span class = "lineno" > 412< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > double< / span > sample_aspect_ratio =< / div >
< div class = "line" > < a name = "l00413" > < / a > < span class = "lineno" > 413< / span >   < span class = "keyword" > static_cast< < / span > < span class = "keywordtype" > double< / span > < span class = "keyword" > > < / span > (pixel_width) / pixel_height;< / div >
< div class = "line" > < a name = "l00414" > < / a > < span class = "lineno" > 414< / span >   trak-> header.width = video_info-> width() * sample_aspect_ratio * 0x10000;< / div >
< div class = "line" > < a name = "l00415" > < / a > < span class = "lineno" > 415< / span >   trak-> header.height = video_info-> height() * 0x10000;< / div >
< div class = "line" > < a name = "l00416" > < / a > < span class = "lineno" > 416< / span >   < / div >
< div class = "line" > < a name = "l00417" > < / a > < span class = "lineno" > 417< / span >   VideoSampleEntry video;< / div >
< div class = "line" > < a name = "l00418" > < / a > < span class = "lineno" > 418< / span >   video.format =< / div >
< div class = "line" > < a name = "l00419" > < / a > < span class = "lineno" > 419< / span >   CodecToFourCC(video_info-> codec(), video_info-> h26x_stream_format());< / div >
< div class = "line" > < a name = "l00420" > < / a > < span class = "lineno" > 420< / span >   video.width = video_info-> width();< / div >
< div class = "line" > < a name = "l00421" > < / a > < span class = "lineno" > 421< / span >   video.height = video_info-> height();< / div >
< div class = "line" > < a name = "l00422" > < / a > < span class = "lineno" > 422< / span >   video.codec_configuration.data = video_info-> codec_config();< / div >
< div class = "line" > < a name = "l00423" > < / a > < span class = "lineno" > 423< / span >   < span class = "keywordflow" > if< / span > (!video.ParseExtraCodecConfigsVector(video_info-> extra_config())) {< / div >
< div class = "line" > < a name = "l00424" > < / a > < span class = "lineno" > 424< / span >   LOG(ERROR) < < < span class = "stringliteral" > " Malformed extra codec configs: " < / span > < / div >
< div class = "line" > < a name = "l00425" > < / a > < span class = "lineno" > 425< / span >   < < base::HexEncode(video_info-> extra_config().data(),< / div >
< div class = "line" > < a name = "l00426" > < / a > < span class = "lineno" > 426< / span >   video_info-> extra_config().size());< / div >
< div class = "line" > < a name = "l00427" > < / a > < span class = "lineno" > 427< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00428" > < / a > < span class = "lineno" > 428< / span >   }< / div >
< div class = "line" > < a name = "l00429" > < / a > < span class = "lineno" > 429< / span >   < span class = "keywordflow" > if< / span > (pixel_width != 1 || pixel_height != 1) {< / div >
< div class = "line" > < a name = "l00430" > < / a > < span class = "lineno" > 430< / span >   video.pixel_aspect.h_spacing = pixel_width;< / div >
< div class = "line" > < a name = "l00431" > < / a > < span class = "lineno" > 431< / span >   video.pixel_aspect.v_spacing = pixel_height;< / div >
< div class = "line" > < a name = "l00432" > < / a > < span class = "lineno" > 432< / span >   }< / div >
< div class = "line" > < a name = "l00433" > < / a > < span class = "lineno" > 433< / span >   < / div >
< div class = "line" > < a name = "l00434" > < / a > < span class = "lineno" > 434< / span >   SampleDescription& sample_description =< / div >
< div class = "line" > < a name = "l00435" > < / a > < span class = "lineno" > 435< / span >   trak-> media.information.sample_table.description;< / div >
< div class = "line" > < a name = "l00436" > < / a > < span class = "lineno" > 436< / span >   sample_description.type = kVideo;< / div >
< div class = "line" > < a name = "l00437" > < / a > < span class = "lineno" > 437< / span >   sample_description.video_entries.push_back(video);< / div >
< div class = "line" > < a name = "l00438" > < / a > < span class = "lineno" > 438< / span >   < / div >
< div class = "line" > < a name = "l00439" > < / a > < span class = "lineno" > 439< / span >   < span class = "keywordflow" > if< / span > (video_info-> is_encrypted()) {< / div >
< div class = "line" > < a name = "l00440" > < / a > < span class = "lineno" > 440< / span >   < span class = "keywordflow" > if< / span > (video_info-> has_clear_lead()) {< / div >
< div class = "line" > < a name = "l00441" > < / a > < span class = "lineno" > 441< / span >   < span class = "comment" > // Add a second entry for clear content.< / span > < / div >
< div class = "line" > < a name = "l00442" > < / a > < span class = "lineno" > 442< / span >   sample_description.video_entries.push_back(video);< / div >
< div class = "line" > < a name = "l00443" > < / a > < span class = "lineno" > 443< / span >   }< / div >
< div class = "line" > < a name = "l00444" > < / a > < span class = "lineno" > 444< / span >   < span class = "comment" > // Convert the first entry to an encrypted entry.< / span > < / div >
< div class = "line" > < a name = "l00445" > < / a > < span class = "lineno" > 445< / span >   VideoSampleEntry& entry = sample_description.video_entries[0];< / div >
< div class = "line" > < a name = "l00446" > < / a > < span class = "lineno" > 446< / span >   GenerateSinf(entry.format, video_info-> encryption_config(), & entry.sinf);< / div >
< div class = "line" > < a name = "l00447" > < / a > < span class = "lineno" > 447< / span >   entry.format = FOURCC_encv;< / 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" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00450" > < / a > < span class = "lineno" > 450< / span >   }< / div >
< div class = "line" > < a name = "l00451" > < / a > < span class = "lineno" > 451< / span >   < / div >
< div class = "line" > < a name = "l00452" > < / a > < span class = "lineno" > 452< / span >   < span class = "keywordtype" > bool< / span > MP4Muxer::GenerateAudioTrak(< span class = "keyword" > const< / span > AudioStreamInfo* audio_info,< / div >
< div class = "line" > < a name = "l00453" > < / a > < span class = "lineno" > 453< / span >   Track* trak) {< / div >
< div class = "line" > < a name = "l00454" > < / a > < span class = "lineno" > 454< / span >   InitializeTrak(audio_info, trak);< / 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 >   trak-> header.volume = 0x100;< / div >
< div class = "line" > < a name = "l00457" > < / a > < span class = "lineno" > 457< / span >   < / div >
< div class = "line" > < a name = "l00458" > < / a > < span class = "lineno" > 458< / span >   AudioSampleEntry audio;< / div >
< div class = "line" > < a name = "l00459" > < / a > < span class = "lineno" > 459< / span >   audio.format =< / div >
< div class = "line" > < a name = "l00460" > < / a > < span class = "lineno" > 460< / span >   CodecToFourCC(audio_info-> codec(), H26xStreamFormat::kUnSpecified);< / div >
< div class = "line" > < a name = "l00461" > < / a > < span class = "lineno" > 461< / span >   < span class = "keywordflow" > switch< / span > (audio_info-> codec()){< / div >
< div class = "line" > < a name = "l00462" > < / a > < span class = "lineno" > 462< / span >   < span class = "keywordflow" > case< / span > kCodecAAC: {< / div >
< div class = "line" > < a name = "l00463" > < / a > < span class = "lineno" > 463< / span >   DecoderConfigDescriptor* decoder_config =< / div >
< div class = "line" > < a name = "l00464" > < / a > < span class = "lineno" > 464< / span >   audio.esds.es_descriptor.mutable_decoder_config_descriptor();< / div >
< div class = "line" > < a name = "l00465" > < / a > < span class = "lineno" > 465< / span >   decoder_config-> set_object_type(ObjectType::kISO_14496_3); < span class = "comment" > // MPEG4 AAC.< / span > < / div >
< div class = "line" > < a name = "l00466" > < / a > < span class = "lineno" > 466< / span >   decoder_config-> set_max_bitrate(audio_info-> max_bitrate());< / div >
< div class = "line" > < a name = "l00467" > < / a > < span class = "lineno" > 467< / span >   decoder_config-> set_avg_bitrate(audio_info-> avg_bitrate());< / div >
< div class = "line" > < a name = "l00468" > < / a > < span class = "lineno" > 468< / span >   decoder_config-> mutable_decoder_specific_info_descriptor()-> set_data(< / div >
< div class = "line" > < a name = "l00469" > < / a > < span class = "lineno" > 469< / span >   audio_info-> codec_config());< / div >
< div class = "line" > < a name = "l00470" > < / a > < span class = "lineno" > 470< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00471" > < / a > < span class = "lineno" > 471< / span >   }< / div >
< div class = "line" > < a name = "l00472" > < / a > < span class = "lineno" > 472< / span >   < span class = "keywordflow" > case< / span > kCodecDTSC:< / div >
< div class = "line" > < a name = "l00473" > < / a > < span class = "lineno" > 473< / span >   < span class = "keywordflow" > case< / span > kCodecDTSH:< / div >
< div class = "line" > < a name = "l00474" > < / a > < span class = "lineno" > 474< / span >   < span class = "keywordflow" > case< / span > kCodecDTSL:< / div >
< div class = "line" > < a name = "l00475" > < / a > < span class = "lineno" > 475< / span >   < span class = "keywordflow" > case< / span > kCodecDTSE:< / div >
< div class = "line" > < a name = "l00476" > < / a > < span class = "lineno" > 476< / span >   < span class = "keywordflow" > case< / span > kCodecDTSM:< / div >
< div class = "line" > < a name = "l00477" > < / a > < span class = "lineno" > 477< / span >   audio.ddts.extra_data = audio_info-> codec_config();< / div >
< div class = "line" > < a name = "l00478" > < / a > < span class = "lineno" > 478< / span >   audio.ddts.max_bitrate = audio_info-> max_bitrate();< / div >
< div class = "line" > < a name = "l00479" > < / a > < span class = "lineno" > 479< / span >   audio.ddts.avg_bitrate = audio_info-> avg_bitrate();< / div >
< div class = "line" > < a name = "l00480" > < / a > < span class = "lineno" > 480< / span >   audio.ddts.sampling_frequency = audio_info-> sampling_frequency();< / div >
< div class = "line" > < a name = "l00481" > < / a > < span class = "lineno" > 481< / span >   audio.ddts.pcm_sample_depth = audio_info-> sample_bits();< / div >
< div class = "line" > < a name = "l00482" > < / a > < span class = "lineno" > 482< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00483" > < / a > < span class = "lineno" > 483< / span >   < span class = "keywordflow" > case< / span > kCodecAC3:< / div >
< div class = "line" > < a name = "l00484" > < / a > < span class = "lineno" > 484< / span >   audio.dac3.data = audio_info-> codec_config();< / div >
< div class = "line" > < a name = "l00485" > < / a > < span class = "lineno" > 485< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00486" > < / a > < span class = "lineno" > 486< / span >   < span class = "keywordflow" > case< / span > kCodecEAC3:< / div >
< div class = "line" > < a name = "l00487" > < / a > < span class = "lineno" > 487< / span >   audio.dec3.data = audio_info-> codec_config();< / div >
< div class = "line" > < a name = "l00488" > < / a > < span class = "lineno" > 488< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00489" > < / a > < span class = "lineno" > 489< / span >   < span class = "keywordflow" > case< / span > kCodecAC4:< / div >
< div class = "line" > < a name = "l00490" > < / a > < span class = "lineno" > 490< / span >   audio.dac4.data = audio_info-> codec_config();< / div >
< div class = "line" > < a name = "l00491" > < / a > < span class = "lineno" > 491< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00492" > < / a > < span class = "lineno" > 492< / span >   < span class = "keywordflow" > case< / span > kCodecFlac:< / div >
< div class = "line" > < a name = "l00493" > < / a > < span class = "lineno" > 493< / span >   audio.dfla.data = audio_info-> codec_config();< / div >
< div class = "line" > < a name = "l00494" > < / a > < span class = "lineno" > 494< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00495" > < / a > < span class = "lineno" > 495< / span >   < span class = "keywordflow" > case< / span > kCodecMP3: {< / div >
< div class = "line" > < a name = "l00496" > < / a > < span class = "lineno" > 496< / span >   DecoderConfigDescriptor* decoder_config =< / div >
< div class = "line" > < a name = "l00497" > < / a > < span class = "lineno" > 497< / span >   audio.esds.es_descriptor.mutable_decoder_config_descriptor();< / div >
< div class = "line" > < a name = "l00498" > < / a > < span class = "lineno" > 498< / span >   uint32_t samplerate = audio_info-> sampling_frequency();< / div >
< div class = "line" > < a name = "l00499" > < / a > < span class = "lineno" > 499< / span >   < span class = "keywordflow" > if< / span > (samplerate < 32000)< / div >
< div class = "line" > < a name = "l00500" > < / a > < span class = "lineno" > 500< / span >   decoder_config-> set_object_type(ObjectType::kISO_13818_3_MPEG1);< / div >
< div class = "line" > < a name = "l00501" > < / a > < span class = "lineno" > 501< / span >   < span class = "keywordflow" > else< / span > < / div >
< div class = "line" > < a name = "l00502" > < / a > < span class = "lineno" > 502< / span >   decoder_config-> set_object_type(ObjectType::kISO_11172_3_MPEG1);< / div >
< div class = "line" > < a name = "l00503" > < / a > < span class = "lineno" > 503< / span >   decoder_config-> set_max_bitrate(audio_info-> max_bitrate());< / div >
< div class = "line" > < a name = "l00504" > < / a > < span class = "lineno" > 504< / span >   decoder_config-> set_avg_bitrate(audio_info-> avg_bitrate());< / div >
< div class = "line" > < a name = "l00505" > < / a > < span class = "lineno" > 505< / span >   < / div >
< div class = "line" > < a name = "l00506" > < / a > < span class = "lineno" > 506< / span >   < span class = "comment" > // For values of DecoderConfigDescriptor.objectTypeIndication< / span > < / div >
< div class = "line" > < a name = "l00507" > < / a > < span class = "lineno" > 507< / span >   < span class = "comment" > // that refer to streams complying with ISO/IEC 11172-3 or< / span > < / div >
< div class = "line" > < a name = "l00508" > < / a > < span class = "lineno" > 508< / span >   < span class = "comment" > // ISO/IEC 13818-3 the decoder specific information is empty< / span > < / div >
< div class = "line" > < a name = "l00509" > < / a > < span class = "lineno" > 509< / span >   < span class = "comment" > // since all necessary data is contained in the bitstream frames< / span > < / div >
< div class = "line" > < a name = "l00510" > < / a > < span class = "lineno" > 510< / span >   < span class = "comment" > // itself.< / span > < / div >
< div class = "line" > < a name = "l00511" > < / a > < span class = "lineno" > 511< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00512" > < / a > < span class = "lineno" > 512< / span >   }< / div >
< div class = "line" > < a name = "l00513" > < / a > < span class = "lineno" > 513< / span >   < span class = "keywordflow" > case< / span > kCodecOpus:< / div >
< div class = "line" > < a name = "l00514" > < / a > < span class = "lineno" > 514< / span >   audio.dops.opus_identification_header = audio_info-> codec_config();< / div >
< div class = "line" > < a name = "l00515" > < / a > < span class = "lineno" > 515< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00516" > < / a > < span class = "lineno" > 516< / span >   < span class = "keywordflow" > default< / span > :< / div >
< div class = "line" > < a name = "l00517" > < / a > < span class = "lineno" > 517< / span >   NOTIMPLEMENTED() < < < span class = "stringliteral" > " Unsupported audio codec " < / span > < < audio_info-> codec();< / div >
< div class = "line" > < a name = "l00518" > < / a > < span class = "lineno" > 518< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00519" > < / a > < span class = "lineno" > 519< / span >   }< / div >
< div class = "line" > < a name = "l00520" > < / a > < span class = "lineno" > 520< / span >   < / div >
< div class = "line" > < a name = "l00521" > < / a > < span class = "lineno" > 521< / span >   < span class = "keywordflow" > if< / span > (audio_info-> codec() == kCodecAC3 || audio_info-> codec() == kCodecEAC3) {< / div >
< div class = "line" > < a name = "l00522" > < / a > < span class = "lineno" > 522< / span >   < span class = "comment" > // AC3 and EC3 does not fill in actual channel count and sample size in< / span > < / div >
< div class = "line" > < a name = "l00523" > < / a > < span class = "lineno" > 523< / span >   < span class = "comment" > // sample description entry. Instead, two constants are used.< / span > < / div >
< div class = "line" > < a name = "l00524" > < / a > < span class = "lineno" > 524< / span >   audio.channelcount = 2;< / div >
< div class = "line" > < a name = "l00525" > < / a > < span class = "lineno" > 525< / span >   audio.samplesize = 16;< / div >
< div class = "line" > < a name = "l00526" > < / a > < span class = "lineno" > 526< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (audio_info-> codec() == kCodecAC4) {< / div >
< div class = "line" > < a name = "l00527" > < / a > < span class = "lineno" > 527< / span >   < span class = "comment" > //ETSI TS 103 190-2, E.4.5 channelcount should be set to the total number of< / span > < / div >
< div class = "line" > < a name = "l00528" > < / a > < span class = "lineno" > 528< / span >   < span class = "comment" > //audio outputchannels of the default audio presentation of that track< / span > < / div >
< div class = "line" > < a name = "l00529" > < / a > < span class = "lineno" > 529< / span >   audio.channelcount = audio_info-> num_channels();< / div >
< div class = "line" > < a name = "l00530" > < / a > < span class = "lineno" > 530< / span >   < span class = "comment" > //ETSI TS 103 190-2, E.4.6 samplesize shall be set to 16.< / span > < / div >
< div class = "line" > < a name = "l00531" > < / a > < span class = "lineno" > 531< / span >   audio.samplesize = 16;< / div >
< div class = "line" > < a name = "l00532" > < / a > < span class = "lineno" > 532< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00533" > < / a > < span class = "lineno" > 533< / span >   audio.channelcount = audio_info-> num_channels();< / div >
< div class = "line" > < a name = "l00534" > < / a > < span class = "lineno" > 534< / span >   audio.samplesize = audio_info-> sample_bits();< / div >
< div class = "line" > < a name = "l00535" > < / a > < span class = "lineno" > 535< / span >   }< / div >
< div class = "line" > < a name = "l00536" > < / a > < span class = "lineno" > 536< / span >   audio.samplerate = audio_info-> sampling_frequency();< / div >
< div class = "line" > < a name = "l00537" > < / a > < span class = "lineno" > 537< / span >   SampleTable& sample_table = trak-> media.information.sample_table;< / div >
< div class = "line" > < a name = "l00538" > < / a > < span class = "lineno" > 538< / span >   SampleDescription& sample_description = sample_table.description;< / div >
< div class = "line" > < a name = "l00539" > < / a > < span class = "lineno" > 539< / span >   sample_description.type = kAudio;< / div >
< div class = "line" > < a name = "l00540" > < / a > < span class = "lineno" > 540< / span >   sample_description.audio_entries.push_back(audio);< / div >
< div class = "line" > < a name = "l00541" > < / a > < span class = "lineno" > 541< / span >   < / div >
< div class = "line" > < a name = "l00542" > < / a > < span class = "lineno" > 542< / span >   < span class = "keywordflow" > if< / span > (audio_info-> is_encrypted()) {< / div >
< div class = "line" > < a name = "l00543" > < / a > < span class = "lineno" > 543< / span >   < span class = "keywordflow" > if< / span > (audio_info-> has_clear_lead()) {< / div >
< div class = "line" > < a name = "l00544" > < / a > < span class = "lineno" > 544< / span >   < span class = "comment" > // Add a second entry for clear content.< / span > < / div >
< div class = "line" > < a name = "l00545" > < / a > < span class = "lineno" > 545< / span >   sample_description.audio_entries.push_back(audio);< / div >
< div class = "line" > < a name = "l00546" > < / a > < span class = "lineno" > 546< / span >   }< / div >
< div class = "line" > < a name = "l00547" > < / a > < span class = "lineno" > 547< / span >   < span class = "comment" > // Convert the first entry to an encrypted entry.< / span > < / div >
< div class = "line" > < a name = "l00548" > < / a > < span class = "lineno" > 548< / span >   AudioSampleEntry& entry = sample_description.audio_entries[0];< / div >
< div class = "line" > < a name = "l00549" > < / a > < span class = "lineno" > 549< / span >   GenerateSinf(entry.format, audio_info-> encryption_config(), & entry.sinf);< / div >
< div class = "line" > < a name = "l00550" > < / a > < span class = "lineno" > 550< / span >   entry.format = FOURCC_enca;< / div >
< div class = "line" > < a name = "l00551" > < / a > < span class = "lineno" > 551< / span >   }< / div >
< div class = "line" > < a name = "l00552" > < / a > < span class = "lineno" > 552< / span >   < / div >
< div class = "line" > < a name = "l00553" > < / a > < span class = "lineno" > 553< / span >   < span class = "keywordflow" > if< / span > (audio_info-> seek_preroll_ns() > 0) {< / div >
< div class = "line" > < a name = "l00554" > < / a > < span class = "lineno" > 554< / span >   sample_table.sample_group_descriptions.resize(1);< / div >
< div class = "line" > < a name = "l00555" > < / a > < span class = "lineno" > 555< / span >   SampleGroupDescription& sample_group_description =< / div >
< div class = "line" > < a name = "l00556" > < / a > < span class = "lineno" > 556< / span >   sample_table.sample_group_descriptions.back();< / div >
< div class = "line" > < a name = "l00557" > < / a > < span class = "lineno" > 557< / span >   sample_group_description.grouping_type = FOURCC_roll;< / div >
< div class = "line" > < a name = "l00558" > < / a > < span class = "lineno" > 558< / span >   sample_group_description.audio_roll_recovery_entries.resize(1);< / div >
< div class = "line" > < a name = "l00559" > < / a > < span class = "lineno" > 559< / span >   sample_group_description.audio_roll_recovery_entries[0].roll_distance =< / div >
< div class = "line" > < a name = "l00560" > < / a > < span class = "lineno" > 560< / span >   GetRollDistance(audio_info-> seek_preroll_ns(), audio.samplerate);< / div >
< div class = "line" > < a name = "l00561" > < / a > < span class = "lineno" > 561< / span >   < span class = "comment" > // sample to group box is not allowed in the init segment per CMAF< / span > < / div >
< div class = "line" > < a name = "l00562" > < / a > < span class = "lineno" > 562< / span >   < span class = "comment" > // specification. It is put in the fragment instead.< / span > < / div >
< div class = "line" > < a name = "l00563" > < / a > < span class = "lineno" > 563< / span >   }< / div >
< div class = "line" > < a name = "l00564" > < / a > < span class = "lineno" > 564< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00565" > < / a > < span class = "lineno" > 565< / span >   }< / div >
< div class = "line" > < a name = "l00566" > < / a > < span class = "lineno" > 566< / span >   < / div >
< div class = "line" > < a name = "l00567" > < / a > < span class = "lineno" > 567< / span >   < span class = "keywordtype" > bool< / span > MP4Muxer::GenerateTextTrak(< span class = "keyword" > const< / span > TextStreamInfo* text_info,< / div >
< div class = "line" > < a name = "l00568" > < / a > < span class = "lineno" > 568< / span >   Track* trak) {< / div >
< div class = "line" > < a name = "l00569" > < / a > < span class = "lineno" > 569< / span >   InitializeTrak(text_info, trak);< / div >
< div class = "line" > < a name = "l00570" > < / a > < span class = "lineno" > 570< / span >   < / div >
< div class = "line" > < a name = "l00571" > < / a > < span class = "lineno" > 571< / span >   < span class = "keywordflow" > if< / span > (text_info-> codec_string() == < span class = "stringliteral" > " wvtt" < / span > ) {< / div >
< div class = "line" > < a name = "l00572" > < / a > < span class = "lineno" > 572< / span >   < span class = "comment" > // Handle WebVTT.< / span > < / div >
< div class = "line" > < a name = "l00573" > < / a > < span class = "lineno" > 573< / span >   TextSampleEntry webvtt;< / div >
< div class = "line" > < a name = "l00574" > < / a > < span class = "lineno" > 574< / span >   webvtt.format = FOURCC_wvtt;< / div >
< div class = "line" > < a name = "l00575" > < / a > < span class = "lineno" > 575< / span >   < / div >
< div class = "line" > < a name = "l00576" > < / a > < span class = "lineno" > 576< / span >   < span class = "comment" > // 14496-30:2014 7.5 Web Video Text Tracks Sample entry format.< / span > < / div >
< div class = "line" > < a name = "l00577" > < / a > < span class = "lineno" > 577< / span >   < span class = "comment" > // In the sample entry, a WebVTT configuration box must occur, carrying< / span > < / div >
< div class = "line" > < a name = "l00578" > < / a > < span class = "lineno" > 578< / span >   < span class = "comment" > // exactly the lines of the WebVTT file header, i.e. all text lines up to< / span > < / div >
< div class = "line" > < a name = "l00579" > < / a > < span class = "lineno" > 579< / span >   < span class = "comment" > // but excluding the ' two or more line terminators' that end the header.< / span > < / div >
< div class = "line" > < a name = "l00580" > < / a > < span class = "lineno" > 580< / span >   webvtt.config.config = < span class = "stringliteral" > " WEBVTT" < / span > ;< / div >
< div class = "line" > < a name = "l00581" > < / a > < span class = "lineno" > 581< / span >   < span class = "comment" > // The spec does not define a way to carry STYLE and REGION information in< / span > < / div >
< div class = "line" > < a name = "l00582" > < / a > < span class = "lineno" > 582< / span >   < span class = "comment" > // the mp4 container.< / span > < / div >
< div class = "line" > < a name = "l00583" > < / a > < span class = "lineno" > 583< / span >   < span class = "keywordflow" > if< / span > (!text_info-> regions().empty() || !text_info-> css_styles().empty()) {< / div >
< div class = "line" > < a name = "l00584" > < / a > < span class = "lineno" > 584< / span >   LOG(INFO) < < < span class = "stringliteral" > " Skipping possible style / region configuration as the spec " < / span > < / div >
< div class = "line" > < a name = "l00585" > < / a > < span class = "lineno" > 585< / span >   < span class = "stringliteral" > " does not define a way to carry them inside ISO-BMFF files." < / span > ;< / div >
< div class = "line" > < a name = "l00586" > < / a > < span class = "lineno" > 586< / span >   }< / div >
< div class = "line" > < a name = "l00587" > < / a > < span class = "lineno" > 587< / span >   < / div >
< div class = "line" > < a name = "l00588" > < / a > < span class = "lineno" > 588< / span >   < span class = "comment" > // TODO(rkuroiwa): This should be the source file URI(s). Putting bogus< / span > < / div >
< div class = "line" > < a name = "l00589" > < / a > < span class = "lineno" > 589< / span >   < span class = "comment" > // string for now so that the box will be there for samples with overlapping< / span > < / div >
< div class = "line" > < a name = "l00590" > < / a > < span class = "lineno" > 590< / span >   < span class = "comment" > // cues.< / span > < / div >
< div class = "line" > < a name = "l00591" > < / a > < span class = "lineno" > 591< / span >   webvtt.label.source_label = < span class = "stringliteral" > " source_label" < / span > ;< / div >
< div class = "line" > < a name = "l00592" > < / a > < span class = "lineno" > 592< / span >   SampleDescription& sample_description =< / div >
< div class = "line" > < a name = "l00593" > < / a > < span class = "lineno" > 593< / span >   trak-> media.information.sample_table.description;< / div >
< div class = "line" > < a name = "l00594" > < / a > < span class = "lineno" > 594< / span >   sample_description.type = kText;< / div >
< div class = "line" > < a name = "l00595" > < / a > < span class = "lineno" > 595< / span >   sample_description.text_entries.push_back(webvtt);< / div >
< div class = "line" > < a name = "l00596" > < / a > < span class = "lineno" > 596< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00597" > < / a > < span class = "lineno" > 597< / span >   } < span class = "keywordflow" > else< / span > < span class = "keywordflow" > if< / span > (text_info-> codec_string() == < span class = "stringliteral" > " ttml" < / span > ) {< / div >
< div class = "line" > < a name = "l00598" > < / a > < span class = "lineno" > 598< / span >   < span class = "comment" > // Handle TTML.< / span > < / div >
< div class = "line" > < a name = "l00599" > < / a > < span class = "lineno" > 599< / span >   TextSampleEntry ttml;< / div >
< div class = "line" > < a name = "l00600" > < / a > < span class = "lineno" > 600< / span >   ttml.format = FOURCC_stpp;< / div >
< div class = "line" > < a name = "l00601" > < / a > < span class = "lineno" > 601< / span >   ttml.namespace_ = ttml::TtmlGenerator::kTtNamespace;< / div >
< div class = "line" > < a name = "l00602" > < / a > < span class = "lineno" > 602< / span >   < / div >
< div class = "line" > < a name = "l00603" > < / a > < span class = "lineno" > 603< / span >   SampleDescription& sample_description =< / div >
< div class = "line" > < a name = "l00604" > < / a > < span class = "lineno" > 604< / span >   trak-> media.information.sample_table.description;< / div >
< div class = "line" > < a name = "l00605" > < / a > < span class = "lineno" > 605< / span >   sample_description.type = kSubtitle;< / div >
< div class = "line" > < a name = "l00606" > < / a > < span class = "lineno" > 606< / span >   sample_description.text_entries.push_back(ttml);< / div >
< div class = "line" > < a name = "l00607" > < / a > < span class = "lineno" > 607< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00608" > < / a > < span class = "lineno" > 608< / span >   }< / div >
< div class = "line" > < a name = "l00609" > < / a > < span class = "lineno" > 609< / span >   NOTIMPLEMENTED() < < text_info-> codec_string()< / div >
< div class = "line" > < a name = "l00610" > < / a > < span class = "lineno" > 610< / span >   < < < span class = "stringliteral" > " handling not implemented yet." < / span > ;< / div >
< div class = "line" > < a name = "l00611" > < / a > < span class = "lineno" > 611< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00612" > < / a > < span class = "lineno" > 612< / span >   }< / div >
< div class = "line" > < a name = "l00613" > < / a > < span class = "lineno" > 613< / span >   < / div >
< div class = "line" > < a name = "l00614" > < / a > < span class = "lineno" > 614< / span >   base::Optional< Range> MP4Muxer::GetInitRangeStartAndEnd() {< / div >
< div class = "line" > < a name = "l00615" > < / a > < span class = "lineno" > 615< / span >   < span class = "keywordtype" > size_t< / span > range_offset = 0;< / div >
< div class = "line" > < a name = "l00616" > < / a > < span class = "lineno" > 616< / span >   < span class = "keywordtype" > size_t< / span > range_size = 0;< / div >
< div class = "line" > < a name = "l00617" > < / a > < span class = "lineno" > 617< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > bool< / span > has_range = segmenter_-> GetInitRange(& range_offset, & range_size);< / div >
< div class = "line" > < a name = "l00618" > < / a > < span class = "lineno" > 618< / span >   < / div >
< div class = "line" > < a name = "l00619" > < / a > < span class = "lineno" > 619< / span >   < span class = "keywordflow" > if< / span > (!has_range)< / div >
< div class = "line" > < a name = "l00620" > < / a > < span class = "lineno" > 620< / span >   < span class = "keywordflow" > return< / span > base::nullopt;< / div >
< div class = "line" > < a name = "l00621" > < / a > < span class = "lineno" > 621< / span >   < / div >
< div class = "line" > < a name = "l00622" > < / a > < span class = "lineno" > 622< / span >   Range range;< / div >
< div class = "line" > < a name = "l00623" > < / a > < span class = "lineno" > 623< / span >   SetStartAndEndFromOffsetAndSize(range_offset, range_size, & range);< / div >
< div class = "line" > < a name = "l00624" > < / a > < span class = "lineno" > 624< / span >   < span class = "keywordflow" > return< / span > range;< / div >
< div class = "line" > < a name = "l00625" > < / a > < span class = "lineno" > 625< / span >   }< / div >
< div class = "line" > < a name = "l00626" > < / a > < span class = "lineno" > 626< / span >   < / div >
< div class = "line" > < a name = "l00627" > < / a > < span class = "lineno" > 627< / span >   base::Optional< Range> MP4Muxer::GetIndexRangeStartAndEnd() {< / div >
< div class = "line" > < a name = "l00628" > < / a > < span class = "lineno" > 628< / span >   < span class = "keywordtype" > size_t< / span > range_offset = 0;< / div >
< div class = "line" > < a name = "l00629" > < / a > < span class = "lineno" > 629< / span >   < span class = "keywordtype" > size_t< / span > range_size = 0;< / div >
< div class = "line" > < a name = "l00630" > < / a > < span class = "lineno" > 630< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > bool< / span > has_range = segmenter_-> GetIndexRange(& range_offset, & range_size);< / div >
< div class = "line" > < a name = "l00631" > < / a > < span class = "lineno" > 631< / span >   < / div >
< div class = "line" > < a name = "l00632" > < / a > < span class = "lineno" > 632< / span >   < span class = "keywordflow" > if< / span > (!has_range)< / div >
< div class = "line" > < a name = "l00633" > < / a > < span class = "lineno" > 633< / span >   < span class = "keywordflow" > return< / span > base::nullopt;< / div >
< div class = "line" > < a name = "l00634" > < / a > < span class = "lineno" > 634< / span >   < / div >
< div class = "line" > < a name = "l00635" > < / a > < span class = "lineno" > 635< / span >   Range range;< / div >
< div class = "line" > < a name = "l00636" > < / a > < span class = "lineno" > 636< / span >   SetStartAndEndFromOffsetAndSize(range_offset, range_size, & range);< / div >
< div class = "line" > < a name = "l00637" > < / a > < span class = "lineno" > 637< / span >   < span class = "keywordflow" > return< / span > range;< / div >
< div class = "line" > < a name = "l00638" > < / a > < span class = "lineno" > 638< / span >   }< / div >
< div class = "line" > < a name = "l00639" > < / a > < span class = "lineno" > 639< / span >   < / div >
< div class = "line" > < a name = "l00640" > < / a > < span class = "lineno" > 640< / span >   < span class = "keywordtype" > void< / span > MP4Muxer::FireOnMediaStartEvent() {< / div >
< div class = "line" > < a name = "l00641" > < / a > < span class = "lineno" > 641< / span >   < span class = "keywordflow" > if< / span > (!muxer_listener())< / div >
< div class = "line" > < a name = "l00642" > < / a > < span class = "lineno" > 642< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00643" > < / a > < span class = "lineno" > 643< / span >   < / div >
< div class = "line" > < a name = "l00644" > < / a > < span class = "lineno" > 644< / span >   < span class = "keywordflow" > if< / span > (streams().size() > 1) {< / div >
< div class = "line" > < a name = "l00645" > < / a > < span class = "lineno" > 645< / span >   LOG(ERROR) < < < span class = "stringliteral" > " MuxerListener cannot take more than 1 stream." < / span > ;< / div >
< div class = "line" > < a name = "l00646" > < / a > < span class = "lineno" > 646< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00647" > < / a > < span class = "lineno" > 647< / span >   }< / div >
< div class = "line" > < a name = "l00648" > < / a > < span class = "lineno" > 648< / span >   DCHECK(!streams().empty()) < < < span class = "stringliteral" > " Media started without a stream." < / span > ;< / div >
< div class = "line" > < a name = "l00649" > < / a > < span class = "lineno" > 649< / span >   < / div >
< div class = "line" > < a name = "l00650" > < / a > < span class = "lineno" > 650< / span >   < span class = "keyword" > const< / span > uint32_t timescale = segmenter_-> GetReferenceTimeScale();< / div >
< div class = "line" > < a name = "l00651" > < / a > < span class = "lineno" > 651< / span >   muxer_listener()-> < a class = "code" href = "../../dd/d7a/classshaka_1_1media_1_1MuxerListener.html#a31536ec385a7ec22f323a42b872b499a" > OnMediaStart< / a > (options(), *streams().front(), timescale,< / div >
< div class = "line" > < a name = "l00652" > < / a > < span class = "lineno" > 652< / span >   MuxerListener::kContainerMp4);< / div >
< div class = "line" > < a name = "l00653" > < / a > < span class = "lineno" > 653< / span >   }< / div >
< div class = "line" > < a name = "l00654" > < / a > < span class = "lineno" > 654< / span >   < / div >
< div class = "line" > < a name = "l00655" > < / a > < span class = "lineno" > 655< / span >   < span class = "keywordtype" > void< / span > MP4Muxer::FireOnMediaEndEvent() {< / div >
< div class = "line" > < a name = "l00656" > < / a > < span class = "lineno" > 656< / span >   < span class = "keywordflow" > if< / span > (!muxer_listener())< / div >
< div class = "line" > < a name = "l00657" > < / a > < span class = "lineno" > 657< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00658" > < / a > < span class = "lineno" > 658< / span >   < / div >
< div class = "line" > < a name = "l00659" > < / a > < span class = "lineno" > 659< / span >   MuxerListener::MediaRanges media_range;< / div >
< div class = "line" > < a name = "l00660" > < / a > < span class = "lineno" > 660< / span >   media_range.init_range = GetInitRangeStartAndEnd();< / div >
< div class = "line" > < a name = "l00661" > < / a > < span class = "lineno" > 661< / span >   media_range.index_range = GetIndexRangeStartAndEnd();< / div >
< div class = "line" > < a name = "l00662" > < / a > < span class = "lineno" > 662< / span >   media_range.subsegment_ranges = segmenter_-> GetSegmentRanges();< / div >
< div class = "line" > < a name = "l00663" > < / a > < span class = "lineno" > 663< / span >   < / div >
< div class = "line" > < a name = "l00664" > < / a > < span class = "lineno" > 664< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > float< / span > duration_seconds = < span class = "keyword" > static_cast< < / span > < span class = "keywordtype" > float< / span > < span class = "keyword" > > < / span > (segmenter_-> GetDuration());< / div >
< div class = "line" > < a name = "l00665" > < / a > < span class = "lineno" > 665< / span >   muxer_listener()-> < a class = "code" href = "../../dd/d7a/classshaka_1_1media_1_1MuxerListener.html#a11d4301cd53ab421f524bfa143eac21a" > OnMediaEnd< / a > (media_range, duration_seconds);< / div >
< div class = "line" > < a name = "l00666" > < / a > < span class = "lineno" > 666< / span >   }< / div >
< div class = "line" > < a name = "l00667" > < / a > < span class = "lineno" > 667< / span >   < / div >
< div class = "line" > < a name = "l00668" > < / a > < span class = "lineno" > 668< / span >   uint64_t MP4Muxer::IsoTimeNow() {< / div >
< div class = "line" > < a name = "l00669" > < / a > < span class = "lineno" > 669< / span >   < span class = "comment" > // Time in seconds from Jan. 1, 1904 to epoch time, i.e. Jan. 1, 1970.< / span > < / div >
< div class = "line" > < a name = "l00670" > < / a > < span class = "lineno" > 670< / span >   < span class = "keyword" > const< / span > uint64_t kIsomTimeOffset = 2082844800l;< / div >
< div class = "line" > < a name = "l00671" > < / a > < span class = "lineno" > 671< / span >   < span class = "keywordflow" > return< / span > kIsomTimeOffset +< / div >
< div class = "line" > < a name = "l00672" > < / a > < span class = "lineno" > 672< / span >   (clock() ? clock()-> Now() : base::Time::Now()).ToDoubleT();< / div >
< div class = "line" > < a name = "l00673" > < / a > < span class = "lineno" > 673< / span >   }< / div >
< div class = "line" > < a name = "l00674" > < / a > < span class = "lineno" > 674< / span >   < / div >
< div class = "line" > < a name = "l00675" > < / a > < span class = "lineno" > 675< / span >   } < span class = "comment" > // namespace mp4< / span > < / div >
< div class = "line" > < a name = "l00676" > < / a > < span class = "lineno" > 676< / span >   } < span class = "comment" > // namespace media< / span > < / div >
< div class = "line" > < a name = "l00677" > < / a > < span class = "lineno" > 677< / span >   } < span class = "comment" > // namespace shaka< / span > < / div >
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< / div > <!-- fragment --> < / div > <!-- contents -->
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< div class = "ttc" id = "aclassshaka_1_1media_1_1Muxer_html" > < div class = "ttname" > < a href = "../../df/d46/classshaka_1_1media_1_1Muxer.html" > shaka::media::Muxer< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../db/df6/muxer_8h_source.html#l00030" > muxer.h:30< / a > < / div > < / div >
< 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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< div class = "ttc" id = "aclassshaka_1_1Status_html" > < div class = "ttname" > < a href = "../../d2/d20/classshaka_1_1Status.html" > shaka::Status< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d1/d13/status_8h_source.html#l00110" > status.h:110< / a > < / div > < / div >
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< div class = "ttc" id = "astructshaka_1_1media_1_1MuxerOptions_html" > < div class = "ttname" > < a href = "../../d0/d27/structshaka_1_1media_1_1MuxerOptions.html" > shaka::media::MuxerOptions< / a > < / div > < div class = "ttdoc" > This structure contains the list of configuration options for Muxer.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d0/d0e/muxer__options_8h_source.html#l00020" > muxer_options.h:20< / a > < / div > < / div >
< div class = "ttc" id = "astructshaka_1_1media_1_1MuxerOptions_html_a5397ee8759a663aea68261600e528d82" > < div class = "ttname" > < a href = "../../d0/d27/structshaka_1_1media_1_1MuxerOptions.html#a5397ee8759a663aea68261600e528d82" > shaka::media::MuxerOptions::output_file_name< / a > < / div > < div class = "ttdeci" > std::string output_file_name< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d0/d0e/muxer__options_8h_source.html#l00034" > muxer_options.h:34< / a > < / div > < / div >
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< div class = "ttc" id = "aclassshaka_1_1media_1_1MuxerListener_html_a11d4301cd53ab421f524bfa143eac21a" > < div class = "ttname" > < a href = "../../dd/d7a/classshaka_1_1media_1_1MuxerListener.html#a11d4301cd53ab421f524bfa143eac21a" > shaka::media::MuxerListener::OnMediaEnd< / a > < / div > < div class = "ttdeci" > virtual void OnMediaEnd(const MediaRanges & media_ranges, float duration_seconds)=0< / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1MuxerListener_html_a31536ec385a7ec22f323a42b872b499a" > < div class = "ttname" > < a href = "../../dd/d7a/classshaka_1_1media_1_1MuxerListener.html#a31536ec385a7ec22f323a42b872b499a" > shaka::media::MuxerListener::OnMediaStart< / a > < / div > < div class = "ttdeci" > virtual void OnMediaStart(const MuxerOptions & muxer_options, const StreamInfo & stream_info, uint32_t time_scale, ContainerType container_type)=0< / div > < / div >
< div class = "ttc" id = "aclassshaka_1_1media_1_1mp4_1_1MP4Muxer_html_a5b6a878865250e3e17268c011a361497" > < div class = "ttname" > < a href = "../../db/d30/classshaka_1_1media_1_1mp4_1_1MP4Muxer.html#a5b6a878865250e3e17268c011a361497" > shaka::media::mp4::MP4Muxer::MP4Muxer< / a > < / div > < div class = "ttdeci" > MP4Muxer(const MuxerOptions & options)< / div > < div class = "ttdoc" > Create a MP4Muxer object from MuxerOptions.< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../da/d88/mp4__muxer_8cc_source.html#l00155" > mp4_muxer.cc:155< / a > < / div > < / div >
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