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< title > DASH Media Packaging SDK: media/formats/webvtt/webvtt_sample_converter.cc Source File< / title >
2017-02-13 22:34:30 +00:00
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< li class = "navelem" > < a class = "el" href = "../../dir_39dc0668bd5a501998f94e8b4e546c71.html" > media< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_65f7acfa8cf3a5f1edc11faa2428b914.html" > formats< / a > < / li > < li class = "navelem" > < a class = "el" href = "../../dir_2eceb70145328c029a5f43350007537a.html" > webvtt< / a > < / li > < / ul >
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< div class = "title" > webvtt_sample_converter.cc< / div > < / div >
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< div class = "fragment" > < div class = "line" > < a name = "l00001" > < / a > < span class = "lineno" > 1< / span >   < span class = "comment" > // Copyright 2015 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 >
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< div class = "line" > < a name = "l00007" > < / a > < span class = "lineno" > 7< / span >   < span class = "preprocessor" > #include " packager/media/formats/webvtt/webvtt_sample_converter.h" < / span > < / div >
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< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < / div >
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< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < span class = "preprocessor" > #include < algorithm> < / span > < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < span class = "preprocessor" > #include < string> < / span > < / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < span class = "preprocessor" > #include " packager/base/strings/string_util.h" < / span > < / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < span class = "preprocessor" > #include " packager/base/strings/stringprintf.h" < / span > < / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < span class = "preprocessor" > #include " packager/media/base/buffer_writer.h" < / span > < / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < span class = "preprocessor" > #include " packager/media/base/media_sample.h" < / span > < / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   < span class = "preprocessor" > #include " packager/media/formats/mp4/box_buffer.h" < / span > < / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   < span class = "preprocessor" > #include " packager/media/formats/mp4/box_definitions.h" < / span > < / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   < span class = "keyword" > namespace < / span > shaka {< / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < span class = "keyword" > namespace < / span > media {< / div >
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< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   < / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   < span class = "keyword" > namespace < / span > {< / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   < / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   std::shared_ptr< MediaSample> CreateEmptyCueSample(uint64_t start_time,< / div >
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< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   uint64_t end_time) {< / div >
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< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   DCHECK_GT(end_time, start_time);< / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   mp4::VTTEmptyCueBox empty_cue_box;< / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   < / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   std::vector< uint8_t> serialized;< / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   AppendBoxToVector(& empty_cue_box, & serialized);< / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   < / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   std::shared_ptr< MediaSample> empty_cue_sample = < a class = "code" href = "../../d7/d6d/classshaka_1_1media_1_1MediaSample.html#ad8975dbb21747ff32c8604f5489bf5c9" > MediaSample::CopyFrom< / a > (< / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   serialized.data(), serialized.size(), < span class = "keyword" > false< / span > );< / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   empty_cue_sample-> set_pts(start_time);< / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   empty_cue_sample-> set_duration(end_time - start_time);< / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   < span class = "keywordflow" > return< / span > empty_cue_sample;< / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   }< / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   < / div >
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< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   < span class = "keywordtype" > void< / span > StripTrailingNewlines(< span class = "keyword" > const< / span > std::string& input, std::string* output) {< / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > size_t< / span > found = input.find_last_not_of(< span class = "charliteral" > ' \n' < / span > );< / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   < span class = "keywordflow" > if< / span > (found != std::string::npos) {< / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   *output = input.substr(0, found + 1);< / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   *output = input;< / 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 >   < / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   mp4::VTTCueBox CueBoxFromCue(< span class = "keyword" > const< / span > Cue& cue) {< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   mp4::VTTCueBox cue_box;< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   < span class = "keywordflow" > if< / span > (!cue.identifier.empty()) {< / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   cue_box.cue_id.cue_id = cue.identifier;< / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   }< / div >
< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   < span class = "keywordflow" > if< / span > (!cue.settings.empty()) {< / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   cue_box.cue_settings.settings = cue.settings;< / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   }< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   < / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   StripTrailingNewlines(cue.payload, & cue_box.cue_payload.cue_text);< / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   < span class = "keywordflow" > return< / span > cue_box;< / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   }< / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   < / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   std::string TimeToWebVttTimeStamp(uint64_t time_in_ms) {< / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > int< / span > milliseconds = time_in_ms % 1000;< / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   < span class = "keyword" > const< / span > uint64_t seconds_left = time_in_ms / 1000;< / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > int< / span > seconds = seconds_left % 60;< / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   < span class = "keyword" > const< / span > uint64_t minutes_left = seconds_left / 60;< / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > int< / span > minutes = minutes_left % 60;< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   < span class = "keyword" > const< / span > < span class = "keywordtype" > int< / span > hours = minutes_left / 60;< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   < span class = "keywordflow" > return< / span > base::StringPrintf(< span class = "stringliteral" > " %02d:%02d:%02d.%03d" < / span > , hours, minutes, seconds,< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   milliseconds);< / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   }< / div >
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< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   < / div >
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< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   std::shared_ptr< MediaSample> CreateVTTCueBoxesSample(< / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   < span class = "keyword" > const< / span > std::list< const Cue*> & cues,< / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   uint64_t start_time,< / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   uint64_t end_time) {< / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   < span class = "comment" > // TODO(rkuroiwa): Source IDs must be assigned to the cues and the same cue< / span > < / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   < span class = "comment" > // should have the same ID in different samples. Probably requires a mapping< / span > < / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   < span class = "comment" > // from cues to IDs.< / span > < / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   CHECK(!cues.empty());< / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   < / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   std::vector< uint8_t> data;< / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   std::string cue_current_time = TimeToWebVttTimeStamp(start_time);< / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   < / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   BufferWriter writer;< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   < span class = "keywordflow" > for< / span > (< span class = "keyword" > const< / span > Cue* cue : cues) {< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   mp4::VTTCueBox cue_box = CueBoxFromCue(*cue);< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   < span class = "comment" > // If there is internal timing, i.e. WebVTT cue timestamp, then< / span > < / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   < span class = "comment" > // cue_current_time should be populated< / span > < / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   < span class = "comment" > // " which gives the VTT timestamp associated with the start time of sample." < / span > < / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   < span class = "comment" > // TODO(rkuroiwa): Reuse TimestampToMilliseconds() to check if there is an< / span > < / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   < span class = "comment" > // internal timestamp in the payload to set CueTimeBox.cue_current_time.< / span > < / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   cue_box.Write(& writer);< / 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 >   std::shared_ptr< MediaSample> sample =< / div >
< div class = "line" > < a name = "l00098" > < / a > < span class = "lineno" > 98< / span >   < a class = "code" href = "../../d7/d6d/classshaka_1_1media_1_1MediaSample.html#ad8975dbb21747ff32c8604f5489bf5c9" > MediaSample::CopyFrom< / a > (writer.Buffer(), writer.Size(), < span class = "keyword" > false< / span > );< / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   sample-> set_pts(start_time);< / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   sample-> set_duration(end_time - start_time);< / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   < span class = "keywordflow" > return< / span > sample;< / 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 >   < / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   < span class = "comment" > // This function returns the minimum of cue_start_time, cue_end_time,< / span > < / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   < span class = "comment" > // current_minimum should be bigger than sweep_line.< / span > < / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   uint64_t GetMinimumPastSweepLine(uint64_t cue_start_time,< / div >
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   uint64_t cue_end_time,< / div >
< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > 108< / span >   uint64_t sweep_line,< / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   uint64_t current_minimum) {< / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   DCHECK_GE(current_minimum, sweep_line);< / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   < span class = "keywordflow" > if< / span > (cue_end_time < = sweep_line)< / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   < span class = "keywordflow" > return< / span > current_minimum;< / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   < / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   < span class = "comment" > // Anything below is cue_end_time > sweep_line.< / span > < / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   < span class = "keywordflow" > if< / span > (cue_start_time > sweep_line) {< / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   < span class = "comment" > // The start time of this cue is past the sweepline, return the min.< / span > < / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   < span class = "keywordflow" > return< / span > std::min(cue_start_time, current_minimum);< / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   } < span class = "keywordflow" > else< / span > {< / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > 119< / span >   < span class = "comment" > // The sweep line is at the start or in the middle of a cue.< / span > < / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   < span class = "keywordflow" > return< / span > std::min(cue_end_time, current_minimum);< / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   }< / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   }< / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   < / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   } < span class = "comment" > // namespace< / span > < / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > 125< / span >   < / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   < span class = "keywordtype" > void< / span > AppendBoxToVector(mp4::Box* box, std::vector< uint8_t> * output_vector) {< / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   BufferWriter writer;< / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > 128< / span >   box-> Write(& writer);< / div >
< div class = "line" > < a name = "l00129" > < / a > < span class = "lineno" > 129< / span >   output_vector-> insert(output_vector-> end(),< / div >
< div class = "line" > < a name = "l00130" > < / a > < span class = "lineno" > 130< / span >   writer.Buffer(),< / div >
< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > 131< / span >   writer.Buffer() + writer.Size());< / div >
< div class = "line" > < a name = "l00132" > < / a > < span class = "lineno" > 132< / span >   }< / div >
< div class = "line" > < a name = "l00133" > < / a > < span class = "lineno" > 133< / span >   < / div >
< div class = "line" > < a name = "l00134" > < / a > < span class = "lineno" > 134< / span >   WebVttSampleConverter::WebVttSampleConverter() : next_cue_start_time_(0u) {}< / div >
< div class = "line" > < a name = "l00135" > < / a > < span class = "lineno" > 135< / span >   WebVttSampleConverter::~WebVttSampleConverter() {}< / 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 >   < span class = "comment" > // Note that this |sample| is either a cue or a comment. It does not have any< / span > < / div >
< div class = "line" > < a name = "l00138" > < / a > < span class = "lineno" > 138< / span >   < span class = "comment" > // info on whether the next cue is overlapping or not.< / span > < / div >
< div class = "line" > < a name = "l00139" > < / a > < span class = "lineno" > < a class = "line" href = "../../de/ddd/classshaka_1_1media_1_1WebVttSampleConverter.html#a651f604362b1dd2660a6fbcdacb75331" > 139< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "../../de/ddd/classshaka_1_1media_1_1WebVttSampleConverter.html#a651f604362b1dd2660a6fbcdacb75331" > WebVttSampleConverter::PushCue< / a > (< span class = "keyword" > const< / span > < a class = "code" href = "../../dd/dce/structshaka_1_1media_1_1Cue.html" > Cue< / a > & cue) {< / div >
< div class = "line" > < a name = "l00140" > < / a > < span class = "lineno" > 140< / span >   < span class = "keywordflow" > if< / span > (!cue.comment.empty()) {< / div >
< div class = "line" > < a name = "l00141" > < / a > < span class = "lineno" > 141< / span >   < span class = "comment" > // A comment. Put it in the buffer and skip.< / span > < / div >
< div class = "line" > < a name = "l00142" > < / a > < span class = "lineno" > 142< / span >   < a class = "code" href = "../../d6/d79/structshaka_1_1media_1_1mp4_1_1VTTAdditionalTextBox.html" > mp4::VTTAdditionalTextBox< / a > comment;< / div >
< div class = "line" > < a name = "l00143" > < / a > < span class = "lineno" > 143< / span >   StripTrailingNewlines(cue.comment, & comment.cue_additional_text);< / div >
< div class = "line" > < a name = "l00144" > < / a > < span class = "lineno" > 144< / span >   additional_texts_.push_back(comment);< / div >
< div class = "line" > < a name = "l00145" > < / a > < span class = "lineno" > 145< / span >   < span class = "comment" > // TODO(rkuriowa): Handle comments as samples.< / span > < / div >
< div class = "line" > < a name = "l00146" > < / a > < span class = "lineno" > 146< / span >   < / div >
2017-02-22 19:44:07 +00:00
< div class = "line" > < a name = "l00147" > < / a > < span class = "lineno" > 147< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00148" > < / a > < span class = "lineno" > 148< / span >   }< / div >
< div class = "line" > < a name = "l00149" > < / a > < span class = "lineno" > 149< / span >   < / div >
2017-03-15 20:49:01 +00:00
< div class = "line" > < a name = "l00150" > < / a > < span class = "lineno" > 150< / span >   cues_.push_back(cue);< / div >
< div class = "line" > < a name = "l00151" > < / a > < span class = "lineno" > 151< / span >   < span class = "keywordflow" > if< / span > (cues_.size() == 1) {< / div >
< div class = "line" > < a name = "l00152" > < / a > < span class = "lineno" > 152< / span >   < span class = "comment" > // Cannot make a decision with just one sample. Cache it and wait for< / span > < / div >
< div class = "line" > < a name = "l00153" > < / a > < span class = "lineno" > 153< / span >   < span class = "comment" > // another one.< / span > < / div >
< div class = "line" > < a name = "l00154" > < / a > < span class = "lineno" > 154< / span >   next_cue_start_time_ = cues_.front().start_time;< / div >
< div class = "line" > < a name = "l00155" > < / a > < span class = "lineno" > 155< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00156" > < / a > < span class = "lineno" > 156< / span >   }< / 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 >   CHECK_GE(cues_.size(), 2u);< / div >
< div class = "line" > < a name = "l00159" > < / a > < span class = "lineno" > 159< / span >   < span class = "comment" > // TODO(rkuroiwa): This isn' t wrong but all the cues where< / span > < / div >
< div class = "line" > < a name = "l00160" > < / a > < span class = "lineno" > 160< / span >   < span class = "comment" > // endtime < latest cue start time< / span > < / div >
< div class = "line" > < a name = "l00161" > < / a > < span class = "lineno" > 161< / span >   < span class = "comment" > // can be processed. Change the logic so that if there are cues that meet the< / span > < / div >
< div class = "line" > < a name = "l00162" > < / a > < span class = "lineno" > 162< / span >   < span class = "comment" > // condition above, create samples immediately and remove them.< / span > < / div >
< div class = "line" > < a name = "l00163" > < / a > < span class = "lineno" > 163< / span >   < span class = "comment" > // Note: This doesn' t mean that all the cues can be removed, just the ones< / span > < / div >
< div class = "line" > < a name = "l00164" > < / a > < span class = "lineno" > 164< / span >   < span class = "comment" > // that meet the condition.< / span > < / div >
< div class = "line" > < a name = "l00165" > < / a > < span class = "lineno" > 165< / span >   < span class = "keywordtype" > bool< / span > processed_cues = HandleAllCuesButLatest();< / div >
< div class = "line" > < a name = "l00166" > < / a > < span class = "lineno" > 166< / span >   < span class = "keywordflow" > if< / span > (!processed_cues)< / div >
< div class = "line" > < a name = "l00167" > < / a > < span class = "lineno" > 167< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00168" > < / a > < span class = "lineno" > 168< / span >   < / div >
< div class = "line" > < a name = "l00169" > < / a > < span class = "lineno" > 169< / span >   < span class = "comment" > // Remove all the cues except the latest one.< / span > < / div >
< div class = "line" > < a name = "l00170" > < / a > < span class = "lineno" > 170< / span >   < span class = "keyword" > auto< / span > erase_last_iterator = --cues_.end();< / div >
< div class = "line" > < a name = "l00171" > < / a > < span class = "lineno" > 171< / span >   cues_.erase(cues_.begin(), erase_last_iterator);< / div >
< div class = "line" > < a name = "l00172" > < / a > < span class = "lineno" > 172< / span >   }< / div >
< div class = "line" > < a name = "l00173" > < / a > < span class = "lineno" > 173< / span >   < / div >
< div class = "line" > < a name = "l00174" > < / a > < span class = "lineno" > < a class = "line" href = "../../de/ddd/classshaka_1_1media_1_1WebVttSampleConverter.html#aa02d5ce7d9609b3841835fbab74b8c81" > 174< / a > < / span >   < span class = "keywordtype" > void< / span > < a class = "code" href = "../../de/ddd/classshaka_1_1media_1_1WebVttSampleConverter.html#aa02d5ce7d9609b3841835fbab74b8c81" > WebVttSampleConverter::Flush< / a > () {< / div >
< div class = "line" > < a name = "l00175" > < / a > < span class = "lineno" > 175< / span >   < span class = "keywordflow" > if< / span > (cues_.empty())< / div >
< div class = "line" > < a name = "l00176" > < / a > < span class = "lineno" > 176< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00177" > < / a > < span class = "lineno" > 177< / span >   < span class = "keywordflow" > if< / span > (cues_.size() == 1) {< / div >
< div class = "line" > < a name = "l00178" > < / a > < span class = "lineno" > 178< / span >   std::list< const Cue*> temp_list;< / div >
< div class = "line" > < a name = "l00179" > < / a > < span class = "lineno" > 179< / span >   temp_list.push_back(& cues_.front());< / div >
< div class = "line" > < a name = "l00180" > < / a > < span class = "lineno" > 180< / span >   CHECK_EQ(next_cue_start_time_, cues_.front().start_time);< / div >
< div class = "line" > < a name = "l00181" > < / a > < span class = "lineno" > 181< / span >   ready_samples_.push_back(CreateVTTCueBoxesSample(< / div >
< div class = "line" > < a name = "l00182" > < / a > < span class = "lineno" > 182< / span >   temp_list,< / div >
< div class = "line" > < a name = "l00183" > < / a > < span class = "lineno" > 183< / span >   next_cue_start_time_,< / div >
< div class = "line" > < a name = "l00184" > < / a > < span class = "lineno" > 184< / span >   cues_.front().start_time + cues_.front().duration));< / div >
< div class = "line" > < a name = "l00185" > < / a > < span class = "lineno" > 185< / span >   cues_.clear();< / div >
< div class = "line" > < a name = "l00186" > < / a > < span class = "lineno" > 186< / span >   < span class = "keywordflow" > return< / span > ;< / div >
< div class = "line" > < a name = "l00187" > < / a > < span class = "lineno" > 187< / span >   }< / div >
< div class = "line" > < a name = "l00188" > < / a > < span class = "lineno" > 188< / span >   < / div >
< div class = "line" > < a name = "l00189" > < / a > < span class = "lineno" > 189< / span >   < span class = "keywordtype" > bool< / span > processed_cue = HandleAllCues();< / div >
< div class = "line" > < a name = "l00190" > < / a > < span class = "lineno" > 190< / span >   CHECK(processed_cue)< / div >
< div class = "line" > < a name = "l00191" > < / a > < span class = "lineno" > 191< / span >   < < < span class = "stringliteral" > " No cues were processed but the cues should have been flushed." < / span > ;< / div >
< div class = "line" > < a name = "l00192" > < / a > < span class = "lineno" > 192< / span >   cues_.clear();< / 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" > < a class = "line" href = "../../de/ddd/classshaka_1_1media_1_1WebVttSampleConverter.html#a3b0e60f307c5ea57d232216eced6af76" > 195< / a > < / span >   < span class = "keywordtype" > size_t< / span > < a class = "code" href = "../../de/ddd/classshaka_1_1media_1_1WebVttSampleConverter.html#a3b0e60f307c5ea57d232216eced6af76" > WebVttSampleConverter::ReadySamplesSize< / a > () {< / div >
< div class = "line" > < a name = "l00196" > < / a > < span class = "lineno" > 196< / span >   < span class = "keywordflow" > return< / span > ready_samples_.size();< / div >
< div class = "line" > < a name = "l00197" > < / a > < span class = "lineno" > 197< / span >   }< / div >
< div class = "line" > < a name = "l00198" > < / a > < span class = "lineno" > 198< / span >   < / div >
< div class = "line" > < a name = "l00199" > < / a > < span class = "lineno" > < a class = "line" href = "../../de/ddd/classshaka_1_1media_1_1WebVttSampleConverter.html#a43fa59b53f847b638cf32c6f03f87dcd" > 199< / a > < / span >   std::shared_ptr< MediaSample> < a class = "code" href = "../../de/ddd/classshaka_1_1media_1_1WebVttSampleConverter.html#a43fa59b53f847b638cf32c6f03f87dcd" > WebVttSampleConverter::PopSample< / a > () {< / div >
< div class = "line" > < a name = "l00200" > < / a > < span class = "lineno" > 200< / span >   CHECK(!ready_samples_.empty());< / div >
< div class = "line" > < a name = "l00201" > < / a > < span class = "lineno" > 201< / span >   std::shared_ptr< MediaSample> ret = ready_samples_.front();< / div >
< div class = "line" > < a name = "l00202" > < / a > < span class = "lineno" > 202< / span >   ready_samples_.pop_front();< / div >
< div class = "line" > < a name = "l00203" > < / a > < span class = "lineno" > 203< / span >   < span class = "keywordflow" > return< / span > ret;< / div >
< div class = "line" > < a name = "l00204" > < / a > < span class = "lineno" > 204< / span >   }< / div >
< div class = "line" > < a name = "l00205" > < / a > < span class = "lineno" > 205< / span >   < / div >
< div class = "line" > < a name = "l00206" > < / a > < span class = "lineno" > 206< / span >   < span class = "comment" > // TODO(rkuroiwa): Some samples may be ready. Example:< / span > < / div >
< div class = "line" > < a name = "l00207" > < / a > < span class = "lineno" > 207< / span >   < span class = "comment" > // Cues:< / span > < / div >
< div class = "line" > < a name = "l00208" > < / a > < span class = "lineno" > 208< / span >   < span class = "comment" > // |--------- 1 ---------|< / span > < / div >
< div class = "line" > < a name = "l00209" > < / a > < span class = "lineno" > 209< / span >   < span class = "comment" > // |-- 2 --|< / span > < / div >
< div class = "line" > < a name = "l00210" > < / a > < span class = "lineno" > 210< / span >   < span class = "comment" > // |-- 3 --|< / span > < / div >
< div class = "line" > < a name = "l00211" > < / a > < span class = "lineno" > 211< / span >   < span class = "comment" > //< / span > < / div >
< div class = "line" > < a name = "l00212" > < / a > < span class = "lineno" > 212< / span >   < span class = "comment" > // Samples:< / span > < / div >
< div class = "line" > < a name = "l00213" > < / a > < span class = "lineno" > 213< / span >   < span class = "comment" > // |A| B | C |< / span > < / div >
< div class = "line" > < a name = "l00214" > < / a > < span class = "lineno" > 214< / span >   < span class = "comment" > // Samples A, B, and C can be created when Cue 3 is pushed.< / span > < / div >
< div class = "line" > < a name = "l00215" > < / a > < span class = "lineno" > 215< / span >   < span class = "comment" > // Change algorithm to create A,B,C samples right away.< / span > < / div >
< div class = "line" > < a name = "l00216" > < / a > < span class = "lineno" > 216< / span >   < span class = "comment" > // Note that this requires change to the caller on which cues< / span > < / div >
< div class = "line" > < a name = "l00217" > < / a > < span class = "lineno" > 217< / span >   < span class = "comment" > // to remove.< / span > < / div >
< div class = "line" > < a name = "l00218" > < / a > < span class = "lineno" > 218< / span >   < span class = "keywordtype" > bool< / span > WebVttSampleConverter::HandleAllCuesButLatest() {< / div >
< div class = "line" > < a name = "l00219" > < / a > < span class = "lineno" > 219< / span >   DCHECK_GE(cues_.size(), 2u);< / div >
< div class = "line" > < a name = "l00220" > < / a > < span class = "lineno" > 220< / span >   < span class = "keyword" > const< / span > < a class = "code" href = "../../dd/dce/structshaka_1_1media_1_1Cue.html" > Cue< / a > & latest_cue = cues_.back();< / div >
< div class = "line" > < a name = "l00221" > < / a > < span class = "lineno" > 221< / span >   < / div >
< div class = "line" > < a name = "l00222" > < / a > < span class = "lineno" > 222< / span >   < span class = "comment" > // Don' t process the cues until the latest cue doesn' t overlap with all the< / span > < / div >
< div class = "line" > < a name = "l00223" > < / a > < span class = "lineno" > 223< / span >   < span class = "comment" > // previous cues.< / span > < / div >
< div class = "line" > < a name = "l00224" > < / a > < span class = "lineno" > 224< / span >   uint64_t max_cue_end_time = 0; < span class = "comment" > // Not including the latest.< / span > < / div >
< div class = "line" > < a name = "l00225" > < / a > < span class = "lineno" > 225< / span >   < span class = "keyword" > auto< / span > latest_cue_it = --cues_.end();< / div >
< div class = "line" > < a name = "l00226" > < / a > < span class = "lineno" > 226< / span >   < span class = "keywordflow" > for< / span > (< span class = "keyword" > auto< / span > cue_it = cues_.begin(); cue_it != latest_cue_it; ++cue_it) {< / div >
< div class = "line" > < a name = "l00227" > < / a > < span class = "lineno" > 227< / span >   < span class = "keyword" > const< / span > < a class = "code" href = "../../dd/dce/structshaka_1_1media_1_1Cue.html" > Cue< / a > & cue = *cue_it;< / div >
< div class = "line" > < a name = "l00228" > < / a > < span class = "lineno" > 228< / span >   < span class = "keyword" > const< / span > uint64_t cue_end_time = cue.start_time + cue.duration;< / div >
< div class = "line" > < a name = "l00229" > < / a > < span class = "lineno" > 229< / span >   < span class = "keywordflow" > if< / span > (cue_end_time > latest_cue.start_time)< / div >
< div class = "line" > < a name = "l00230" > < / a > < span class = "lineno" > 230< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00231" > < / a > < span class = "lineno" > 231< / span >   < / div >
< div class = "line" > < a name = "l00232" > < / a > < span class = "lineno" > 232< / span >   < span class = "keywordflow" > if< / span > (max_cue_end_time < cue_end_time)< / div >
< div class = "line" > < a name = "l00233" > < / a > < span class = "lineno" > 233< / span >   max_cue_end_time = cue_end_time;< / div >
< div class = "line" > < a name = "l00234" > < / a > < span class = "lineno" > 234< / span >   }< / div >
< div class = "line" > < a name = "l00235" > < / a > < span class = "lineno" > 235< / span >   < span class = "comment" > // Reaching here means that the latest cue does not overlap with all< / span > < / div >
< div class = "line" > < a name = "l00236" > < / a > < span class = "lineno" > 236< / span >   < span class = "comment" > // the previous cues.< / span > < / 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 >   < span class = "comment" > // Because sweep_stop_time is assigned to next_cue_start_time_ it is not< / span > < / div >
< div class = "line" > < a name = "l00239" > < / a > < span class = "lineno" > 239< / span >   < span class = "comment" > // set to latest_cue.start_time here; there may be a gap between< / span > < / div >
< div class = "line" > < a name = "l00240" > < / a > < span class = "lineno" > 240< / span >   < span class = "comment" > // latest_cue.start_time and previous_cue_end_time.< / span > < / div >
< div class = "line" > < a name = "l00241" > < / a > < span class = "lineno" > 241< / span >   < span class = "comment" > // The correctness of SweepCues() doesn' t change whether the sweep stops< / span > < / div >
< div class = "line" > < a name = "l00242" > < / a > < span class = "lineno" > 242< / span >   < span class = "comment" > // right before the latest cue or right before the gap.< / span > < / div >
< div class = "line" > < a name = "l00243" > < / a > < span class = "lineno" > 243< / span >   < span class = "keyword" > const< / span > uint64_t sweep_stop_time = max_cue_end_time;< / div >
< div class = "line" > < a name = "l00244" > < / a > < span class = "lineno" > 244< / span >   < span class = "keyword" > const< / span > uint64_t sweep_line_start = cues_.front().start_time;< / div >
< div class = "line" > < a name = "l00245" > < / a > < span class = "lineno" > 245< / span >   < span class = "keywordtype" > bool< / span > processed_cues =< / div >
< div class = "line" > < a name = "l00246" > < / a > < span class = "lineno" > 246< / span >   SweepCues(sweep_line_start, sweep_stop_time);< / div >
< div class = "line" > < a name = "l00247" > < / a > < span class = "lineno" > 247< / span >   next_cue_start_time_ = sweep_stop_time;< / div >
< div class = "line" > < a name = "l00248" > < / a > < span class = "lineno" > 248< / span >   < span class = "keywordflow" > if< / span > (next_cue_start_time_ < latest_cue.start_time) {< / div >
< div class = "line" > < a name = "l00249" > < / a > < span class = "lineno" > 249< / span >   ready_samples_.push_back(CreateEmptyCueSample(next_cue_start_time_,< / div >
< div class = "line" > < a name = "l00250" > < / a > < span class = "lineno" > 250< / span >   latest_cue.start_time));< / div >
< div class = "line" > < a name = "l00251" > < / a > < span class = "lineno" > 251< / span >   next_cue_start_time_ = latest_cue.start_time;< / div >
< div class = "line" > < a name = "l00252" > < / a > < span class = "lineno" > 252< / span >   }< / div >
< div class = "line" > < a name = "l00253" > < / a > < span class = "lineno" > 253< / span >   < span class = "keywordflow" > return< / span > processed_cues;< / div >
< div class = "line" > < a name = "l00254" > < / a > < span class = "lineno" > 254< / span >   }< / div >
< div class = "line" > < a name = "l00255" > < / a > < span class = "lineno" > 255< / span >   < / div >
< div class = "line" > < a name = "l00256" > < / a > < span class = "lineno" > 256< / span >   < span class = "keywordtype" > bool< / span > WebVttSampleConverter::HandleAllCues() {< / div >
< div class = "line" > < a name = "l00257" > < / a > < span class = "lineno" > 257< / span >   uint64_t latest_time = 0u;< / div >
< div class = "line" > < a name = "l00258" > < / a > < span class = "lineno" > 258< / span >   < span class = "keywordflow" > for< / span > (< span class = "keyword" > const< / span > Cue& cue : cues_) {< / div >
< div class = "line" > < a name = "l00259" > < / a > < span class = "lineno" > 259< / span >   < span class = "keywordflow" > if< / span > (cue.start_time + cue.duration > latest_time)< / div >
< div class = "line" > < a name = "l00260" > < / a > < span class = "lineno" > 260< / span >   latest_time = cue.start_time + cue.duration;< / div >
< div class = "line" > < a name = "l00261" > < / a > < span class = "lineno" > 261< / span >   }< / div >
< div class = "line" > < a name = "l00262" > < / a > < span class = "lineno" > 262< / span >   < span class = "keyword" > const< / span > uint64_t sweep_line_start = cues_.front().start_time;< / div >
< div class = "line" > < a name = "l00263" > < / a > < span class = "lineno" > 263< / span >   < span class = "keyword" > const< / span > uint64_t sweep_stop_time = latest_time;< / div >
< div class = "line" > < a name = "l00264" > < / a > < span class = "lineno" > 264< / span >   < span class = "keywordtype" > bool< / span > processed = SweepCues(sweep_line_start, sweep_stop_time);< / div >
< div class = "line" > < a name = "l00265" > < / a > < span class = "lineno" > 265< / span >   next_cue_start_time_ = sweep_stop_time;< / div >
< div class = "line" > < a name = "l00266" > < / a > < span class = "lineno" > 266< / span >   < span class = "keywordflow" > return< / span > processed;< / div >
< div class = "line" > < a name = "l00267" > < / a > < span class = "lineno" > 267< / span >   }< / 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 = "keywordtype" > bool< / span > WebVttSampleConverter::SweepCues(uint64_t sweep_line,< / div >
< div class = "line" > < a name = "l00270" > < / a > < span class = "lineno" > 270< / span >   uint64_t sweep_stop_time) {< / div >
< div class = "line" > < a name = "l00271" > < / a > < span class = "lineno" > 271< / span >   < span class = "keywordtype" > bool< / span > processed_cues = < span class = "keyword" > false< / span > ;< / div >
< div class = "line" > < a name = "l00272" > < / a > < span class = "lineno" > 272< / span >   < span class = "comment" > // This is a sweep line algorithm. For every iteration, it determines active< / span > < / div >
< div class = "line" > < a name = "l00273" > < / a > < span class = "lineno" > 273< / span >   < span class = "comment" > // cues and makes a sample.< / span > < / div >
< div class = "line" > < a name = "l00274" > < / a > < span class = "lineno" > 274< / span >   < span class = "comment" > // At the end of an interation |next_start_time| should be set to the minimum< / span > < / div >
< div class = "line" > < a name = "l00275" > < / a > < span class = "lineno" > 275< / span >   < span class = "comment" > // of all the start and end times of the cues that is after |sweep_line|.< / span > < / div >
< div class = "line" > < a name = "l00276" > < / a > < span class = "lineno" > 276< / span >   < span class = "comment" > // |sweep_line| is set to |next_start_time| before the next iteration.< / span > < / div >
< div class = "line" > < a name = "l00277" > < / a > < span class = "lineno" > 277< / span >   < span class = "keywordflow" > while< / span > (sweep_line < sweep_stop_time) {< / div >
< div class = "line" > < a name = "l00278" > < / a > < span class = "lineno" > 278< / span >   std::list< const Cue*> cues_for_a_sample;< / div >
< div class = "line" > < a name = "l00279" > < / a > < span class = "lineno" > 279< / span >   uint64_t next_start_time = sweep_stop_time;< / 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 = "comment" > // Put all the cues that should be displayed at sweep_line, in< / span > < / div >
< div class = "line" > < a name = "l00282" > < / a > < span class = "lineno" > 282< / span >   < span class = "comment" > // cues_for_a_sample.< / span > < / div >
< div class = "line" > < a name = "l00283" > < / a > < span class = "lineno" > 283< / span >   < span class = "comment" > // next_start_time is also updated in this loop by checking all the cues.< / span > < / div >
< div class = "line" > < a name = "l00284" > < / a > < span class = "lineno" > 284< / span >   < span class = "keywordflow" > for< / span > (< span class = "keyword" > const< / span > Cue& cue : cues_) {< / div >
< div class = "line" > < a name = "l00285" > < / a > < span class = "lineno" > 285< / span >   < span class = "keywordflow" > if< / span > (cue.start_time > = sweep_stop_time)< / div >
< div class = "line" > < a name = "l00286" > < / a > < span class = "lineno" > 286< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00287" > < / a > < span class = "lineno" > 287< / span >   < span class = "keywordflow" > if< / span > (cue.start_time > = next_start_time)< / div >
< div class = "line" > < a name = "l00288" > < / a > < span class = "lineno" > 288< / span >   < span class = "keywordflow" > break< / span > ;< / div >
< div class = "line" > < a name = "l00289" > < / a > < span class = "lineno" > 289< / span >   < / div >
< div class = "line" > < a name = "l00290" > < / a > < span class = "lineno" > 290< / span >   < span class = "keyword" > const< / span > uint64_t cue_end_time = cue.start_time + cue.duration;< / div >
< div class = "line" > < a name = "l00291" > < / a > < span class = "lineno" > 291< / span >   < span class = "keywordflow" > if< / span > (cue_end_time < = sweep_line)< / div >
< div class = "line" > < a name = "l00292" > < / a > < span class = "lineno" > 292< / span >   < span class = "keywordflow" > continue< / span > ;< / div >
< div class = "line" > < a name = "l00293" > < / a > < span class = "lineno" > 293< / span >   next_start_time = GetMinimumPastSweepLine(< / div >
< div class = "line" > < a name = "l00294" > < / a > < span class = "lineno" > 294< / span >   cue.start_time, cue_end_time, sweep_line, next_start_time);< / div >
< div class = "line" > < a name = "l00295" > < / a > < span class = "lineno" > 295< / span >   < / div >
< div class = "line" > < a name = "l00296" > < / a > < span class = "lineno" > 296< / span >   < span class = "keywordflow" > if< / span > (cue.start_time < = sweep_line) {< / div >
< div class = "line" > < a name = "l00297" > < / a > < span class = "lineno" > 297< / span >   DCHECK_GT(cue_end_time, sweep_line);< / div >
< div class = "line" > < a name = "l00298" > < / a > < span class = "lineno" > 298< / span >   cues_for_a_sample.push_back(& cue);< / div >
< div class = "line" > < a name = "l00299" > < / a > < span class = "lineno" > 299< / span >   }< / 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 >   DCHECK(!cues_for_a_sample.empty()) < < < span class = "stringliteral" > " For now the only use case of this " < / span > < / div >
< div class = "line" > < a name = "l00303" > < / a > < span class = "lineno" > 303< / span >   < span class = "stringliteral" > " function is to sweep non-empty " < / span > < / div >
< div class = "line" > < a name = "l00304" > < / a > < span class = "lineno" > 304< / span >   < span class = "stringliteral" > " cues." < / span > ;< / div >
< div class = "line" > < a name = "l00305" > < / a > < span class = "lineno" > 305< / span >   < span class = "keywordflow" > if< / span > (!cues_for_a_sample.empty()) {< / div >
< div class = "line" > < a name = "l00306" > < / a > < span class = "lineno" > 306< / span >   ready_samples_.push_back(CreateVTTCueBoxesSample(< / div >
< div class = "line" > < a name = "l00307" > < / a > < span class = "lineno" > 307< / span >   cues_for_a_sample, sweep_line, next_start_time));< / div >
< div class = "line" > < a name = "l00308" > < / a > < span class = "lineno" > 308< / span >   processed_cues = < span class = "keyword" > true< / span > ;< / 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 >   sweep_line = next_start_time;< / div >
< div class = "line" > < a name = "l00312" > < / a > < span class = "lineno" > 312< / span >   }< / div >
< div class = "line" > < a name = "l00313" > < / a > < span class = "lineno" > 313< / span >   < / div >
< div class = "line" > < a name = "l00314" > < / a > < span class = "lineno" > 314< / span >   DCHECK_EQ(sweep_line, sweep_stop_time);< / div >
< div class = "line" > < a name = "l00315" > < / a > < span class = "lineno" > 315< / span >   < span class = "keywordflow" > return< / span > processed_cues;< / div >
< div class = "line" > < a name = "l00316" > < / a > < span class = "lineno" > 316< / span >   }< / div >
< div class = "line" > < a name = "l00317" > < / a > < span class = "lineno" > 317< / span >   < / div >
< div class = "line" > < a name = "l00318" > < / a > < span class = "lineno" > 318< / span >   } < span class = "comment" > // namespace media< / span > < / div >
< div class = "line" > < a name = "l00319" > < / a > < span class = "lineno" > 319< / span >   } < span class = "comment" > // namespace shaka< / span > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1WebVttSampleConverter_html_aa02d5ce7d9609b3841835fbab74b8c81" > < div class = "ttname" > < a href = "../../de/ddd/classshaka_1_1media_1_1WebVttSampleConverter.html#aa02d5ce7d9609b3841835fbab74b8c81" > shaka::media::WebVttSampleConverter::Flush< / a > < / div > < div class = "ttdeci" > virtual void Flush()< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/df5/webvtt__sample__converter_8cc_source.html#l00174" > webvtt_sample_converter.cc:174< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1WebVttSampleConverter_html_a3b0e60f307c5ea57d232216eced6af76" > < div class = "ttname" > < a href = "../../de/ddd/classshaka_1_1media_1_1WebVttSampleConverter.html#a3b0e60f307c5ea57d232216eced6af76" > shaka::media::WebVttSampleConverter::ReadySamplesSize< / a > < / div > < div class = "ttdeci" > virtual size_t ReadySamplesSize()< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/df5/webvtt__sample__converter_8cc_source.html#l00195" > webvtt_sample_converter.cc:195< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1WebVttSampleConverter_html_a651f604362b1dd2660a6fbcdacb75331" > < div class = "ttname" > < a href = "../../de/ddd/classshaka_1_1media_1_1WebVttSampleConverter.html#a651f604362b1dd2660a6fbcdacb75331" > shaka::media::WebVttSampleConverter::PushCue< / a > < / div > < div class = "ttdeci" > virtual void PushCue(const Cue & cue)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/df5/webvtt__sample__converter_8cc_source.html#l00139" > webvtt_sample_converter.cc:139< / a > < / div > < / div >
2017-02-13 22:34:30 +00:00
< div class = "ttc" id = "classshaka_1_1media_1_1MediaSample_html_ad8975dbb21747ff32c8604f5489bf5c9" > < div class = "ttname" > < a href = "../../d7/d6d/classshaka_1_1media_1_1MediaSample.html#ad8975dbb21747ff32c8604f5489bf5c9" > shaka::media::MediaSample::CopyFrom< / a > < / div > < div class = "ttdeci" > static std::shared_ptr< MediaSample > CopyFrom(const uint8_t *data, size_t size, bool is_key_frame)< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d8/d0d/media__sample_8cc_source.html#l00045" > media_sample.cc:45< / a > < / div > < / div >
< div class = "ttc" id = "structshaka_1_1media_1_1mp4_1_1VTTAdditionalTextBox_html" > < div class = "ttname" > < a href = "../../d6/d79/structshaka_1_1media_1_1mp4_1_1VTTAdditionalTextBox.html" > shaka::media::mp4::VTTAdditionalTextBox< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d5/d7b/box__definitions_8h_source.html#l00818" > box_definitions.h:818< / a > < / div > < / div >
2017-03-15 20:49:01 +00:00
< div class = "ttc" id = "classshaka_1_1media_1_1WebVttSampleConverter_html_a43fa59b53f847b638cf32c6f03f87dcd" > < div class = "ttname" > < a href = "../../de/ddd/classshaka_1_1media_1_1WebVttSampleConverter.html#a43fa59b53f847b638cf32c6f03f87dcd" > shaka::media::WebVttSampleConverter::PopSample< / a > < / div > < div class = "ttdeci" > virtual std::shared_ptr< MediaSample > PopSample()< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d4/df5/webvtt__sample__converter_8cc_source.html#l00199" > webvtt_sample_converter.cc:199< / a > < / div > < / div >
< div class = "ttc" id = "structshaka_1_1media_1_1Cue_html" > < div class = "ttname" > < a href = "../../dd/dce/structshaka_1_1media_1_1Cue.html" > shaka::media::Cue< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d6/d6a/cue_8h_source.html#l00018" > cue.h:18< / a > < / div > < / div >
2017-02-13 22:34:30 +00:00
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