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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_1338cd99faf71b6cb1609e99e3340e45.html" > chunking< / a > < / li > < / ul >
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< div class = "fragment" > < div class = "line" > < a name = "l00001" > < / a > < span class = "lineno" > 1< / span >   < span class = "comment" > // Copyright 2018 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/chunking/sync_point_queue.h" < / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < span class = "preprocessor" > #include " packager/media/base/media_handler.h" < / span > < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < span class = "preprocessor" > #include < algorithm> < / span > < / div >
< div class = "line" > < a name = "l00011" > < / a > < span class = "lineno" > 11< / span >   < span class = "preprocessor" > #include < limits> < / span > < / div >
< div class = "line" > < a name = "l00012" > < / a > < span class = "lineno" > 12< / span >   < / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < span class = "keyword" > namespace < / span > < a class = "code" href = "../../d8/daf/namespaceshaka.html" > shaka< / a > {< / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < span class = "keyword" > namespace < / span > media {< / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > 15< / span >   < / div >
< div class = "line" > < a name = "l00016" > < / a > < span class = "lineno" > 16< / span >   SyncPointQueue::SyncPointQueue(< span class = "keyword" > const< / span > AdCueGeneratorParams& params)< / div >
< div class = "line" > < a name = "l00017" > < / a > < span class = "lineno" > 17< / span >   : sync_condition_(& lock_) {< / div >
< div class = "line" > < a name = "l00018" > < / a > < span class = "lineno" > 18< / span >   < span class = "keywordflow" > for< / span > (< span class = "keyword" > const< / span > Cuepoint& point : params.cue_points) {< / div >
< div class = "line" > < a name = "l00019" > < / a > < span class = "lineno" > 19< / span >   std::shared_ptr< CueEvent> < span class = "keyword" > event< / span > = std::make_shared< CueEvent> ();< / div >
< div class = "line" > < a name = "l00020" > < / a > < span class = "lineno" > 20< / span >   < span class = "keyword" > event< / span > -> time_in_seconds = point.start_time_in_seconds;< / div >
< div class = "line" > < a name = "l00021" > < / a > < span class = "lineno" > 21< / span >   unpromoted_[point.start_time_in_seconds] = std::move(event);< / div >
< div class = "line" > < a name = "l00022" > < / a > < span class = "lineno" > 22< / span >   }< / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > 23< / span >   }< / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   < / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > < a class = "line" href = "../../d0/dea/classshaka_1_1media_1_1SyncPointQueue.html#a84f1c4ad047ffa4bd75d5d1426bf9cd2" > 25< / a > < / span >   < span class = "keywordtype" > void< / span > SyncPointQueue::AddThread() {< / div >
< div class = "line" > < a name = "l00026" > < / a > < span class = "lineno" > 26< / span >   base::AutoLock auto_lock(lock_);< / div >
< div class = "line" > < a name = "l00027" > < / a > < span class = "lineno" > 27< / span >   thread_count_++;< / 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 >   < / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > < a class = "line" href = "../../d0/dea/classshaka_1_1media_1_1SyncPointQueue.html#a77ec615ca1fa21d347bf03c537af9ed8" > 30< / a > < / span >   < span class = "keywordtype" > void< / span > SyncPointQueue::Cancel() {< / 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 >   base::AutoLock auto_lock(lock_);< / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   cancelled_ = < span class = "keyword" > true< / span > ;< / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > 34< / span >   }< / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   sync_condition_.Broadcast();< / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   }< / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   < / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > < a class = "line" href = "../../d0/dea/classshaka_1_1media_1_1SyncPointQueue.html#aef18f6547ff76cb8c6a5e14270950a59" > 38< / a > < / span >   < span class = "keywordtype" > double< / span > SyncPointQueue::GetHint(< span class = "keywordtype" > double< / span > time_in_seconds) {< / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   base::AutoLock auto_lock(lock_);< / div >
< div class = "line" > < a name = "l00040" > < / a > < span class = "lineno" > 40< / span >   < / div >
< div class = "line" > < a name = "l00041" > < / a > < span class = "lineno" > 41< / span >   < span class = "keyword" > auto< / span > iter = promoted_.upper_bound(time_in_seconds);< / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   < span class = "keywordflow" > if< / span > (iter != promoted_.end())< / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   < span class = "keywordflow" > return< / span > iter-> first;< / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   < / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   iter = unpromoted_.upper_bound(time_in_seconds);< / div >
< div class = "line" > < a name = "l00046" > < / a > < span class = "lineno" > 46< / span >   < span class = "keywordflow" > if< / span > (iter != unpromoted_.end())< / div >
< div class = "line" > < a name = "l00047" > < / a > < span class = "lineno" > 47< / span >   < span class = "keywordflow" > return< / span > iter-> first;< / div >
< div class = "line" > < a name = "l00048" > < / a > < span class = "lineno" > 48< / span >   < / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   < span class = "comment" > // Use MAX DOUBLE as the fall back so that we can force all streams to run< / span > < / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   < span class = "comment" > // out all their samples even when there are no cues.< / span > < / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   < span class = "keywordflow" > return< / span > std::numeric_limits< double> ::max();< / 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" > < a class = "line" href = "../../d0/dea/classshaka_1_1media_1_1SyncPointQueue.html#a49bdaa61608fe2229eaff4032dd804b1" > 54< / a > < / span >   std::shared_ptr< const CueEvent> SyncPointQueue::GetNext(< / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   < span class = "keywordtype" > double< / span > hint_in_seconds) {< / div >
< div class = "line" > < a name = "l00056" > < / a > < span class = "lineno" > 56< / span >   base::AutoLock auto_lock(lock_);< / div >
< div class = "line" > < a name = "l00057" > < / a > < span class = "lineno" > 57< / span >   < span class = "keywordflow" > while< / span > (!cancelled_) {< / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   < span class = "comment" > // Find the promoted cue that would line up with our hint, which is the< / span > < / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   < span class = "comment" > // first cue that is not less than |hint_in_seconds|.< / span > < / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   < span class = "keyword" > auto< / span > iter = promoted_.lower_bound(hint_in_seconds);< / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   < span class = "keywordflow" > if< / span > (iter != promoted_.end()) {< / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   < span class = "keywordflow" > return< / span > iter-> second;< / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   }< / div >
< div class = "line" > < a name = "l00064" > < / a > < span class = "lineno" > 64< / span >   < / div >
< div class = "line" > < a name = "l00065" > < / a > < span class = "lineno" > 65< / span >   < span class = "comment" > // Promote |hint_in_seconds| if everyone is waiting.< / span > < / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   < span class = "keywordflow" > if< / span > (waiting_thread_count_ + 1 == thread_count_) {< / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   std::shared_ptr< const CueEvent> cue = PromoteAtNoLocking(hint_in_seconds);< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   CHECK(cue);< / div >
< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < span class = "keywordflow" > return< / span > cue;< / div >
< div class = "line" > < a name = "l00070" > < / a > < span class = "lineno" > 70< / span >   }< / div >
< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   < / div >
< div class = "line" > < a name = "l00072" > < / a > < span class = "lineno" > 72< / span >   waiting_thread_count_++;< / div >
< div class = "line" > < a name = "l00073" > < / a > < span class = "lineno" > 73< / span >   < span class = "comment" > // This blocks until either a cue is promoted or all threads are blocked< / span > < / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < span class = "comment" > // (in which case, the unpromoted cue at the hint will be self-promoted< / span > < / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   < span class = "comment" > // and returned - see section above). Spurious signal events are possible< / span > < / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   < span class = "comment" > // with most condition variable implementations, so if it returns, we go< / span > < / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   < span class = "comment" > // back and check if a cue is actually promoted or not.< / span > < / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   sync_condition_.Wait();< / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   waiting_thread_count_--;< / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   }< / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > nullptr< / span > ;< / 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 >   < / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > < a class = "line" href = "../../d0/dea/classshaka_1_1media_1_1SyncPointQueue.html#a17af2cb9949f40ee8aa06cfdd55b2c16" > 84< / a > < / span >   std::shared_ptr< const CueEvent> SyncPointQueue::PromoteAt(< / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   < span class = "keywordtype" > double< / span > time_in_seconds) {< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   base::AutoLock auto_lock(lock_);< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   < span class = "keywordflow" > return< / span > PromoteAtNoLocking(time_in_seconds);< / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   }< / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   < / div >
< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > < a class = "line" href = "../../d0/dea/classshaka_1_1media_1_1SyncPointQueue.html#a5d27bfb8e8c3209222352f721f9b5236" > 90< / a > < / span >   < span class = "keywordtype" > bool< / span > SyncPointQueue::HasMore(< span class = "keywordtype" > double< / span > hint_in_seconds)< span class = "keyword" > const < / span > {< / div >
< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   < span class = "keywordflow" > return< / span > hint_in_seconds < std::numeric_limits< double> ::max();< / div >
< div class = "line" > < a name = "l00092" > < / a > < span class = "lineno" > 92< / span >   }< / div >
< div class = "line" > < a name = "l00093" > < / a > < span class = "lineno" > 93< / span >   < / div >
< div class = "line" > < a name = "l00094" > < / a > < span class = "lineno" > 94< / span >   std::shared_ptr< const CueEvent> SyncPointQueue::PromoteAtNoLocking(< / div >
< div class = "line" > < a name = "l00095" > < / a > < span class = "lineno" > 95< / span >   < span class = "keywordtype" > double< / span > time_in_seconds) {< / div >
< div class = "line" > < a name = "l00096" > < / a > < span class = "lineno" > 96< / span >   lock_.AssertAcquired();< / 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 = "comment" > // It is possible that |time_in_seconds| has been promoted.< / span > < / div >
< div class = "line" > < a name = "l00099" > < / a > < span class = "lineno" > 99< / span >   < span class = "keyword" > auto< / span > iter = promoted_.find(time_in_seconds);< / div >
< div class = "line" > < a name = "l00100" > < / a > < span class = "lineno" > 100< / span >   < span class = "keywordflow" > if< / span > (iter != promoted_.end())< / div >
< div class = "line" > < a name = "l00101" > < / a > < span class = "lineno" > 101< / span >   < span class = "keywordflow" > return< / span > iter-> second;< / 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 >   < span class = "comment" > // Find the unpromoted cue that would work for the given time, which is the< / span > < / div >
< div class = "line" > < a name = "l00104" > < / a > < span class = "lineno" > 104< / span >   < span class = "comment" > // first cue that is not greater than |time_in_seconds|.< / span > < / div >
< div class = "line" > < a name = "l00105" > < / a > < span class = "lineno" > 105< / span >   < span class = "comment" > // So find the the first cue that is greater than |time_in_seconds| first and< / span > < / div >
< div class = "line" > < a name = "l00106" > < / a > < span class = "lineno" > 106< / span >   < span class = "comment" > // then get the previous one.< / span > < / div >
< div class = "line" > < a name = "l00107" > < / a > < span class = "lineno" > 107< / span >   iter = unpromoted_.upper_bound(time_in_seconds);< / div >
< div class = "line" > < a name = "l00108" > < / a > < span class = "lineno" > 108< / span >   < span class = "comment" > // The first cue in |unpromoted_| should not be greater than< / span > < / div >
< div class = "line" > < a name = "l00109" > < / a > < span class = "lineno" > 109< / span >   < span class = "comment" > // |time_in_seconds|. It could happen only if it has been promoted at a< / span > < / div >
< div class = "line" > < a name = "l00110" > < / a > < span class = "lineno" > 110< / span >   < span class = "comment" > // different timestamp, which can only be the result of unaligned GOPs.< / span > < / div >
< div class = "line" > < a name = "l00111" > < / a > < span class = "lineno" > 111< / span >   < span class = "keywordflow" > if< / span > (iter == unpromoted_.begin())< / div >
< div class = "line" > < a name = "l00112" > < / a > < span class = "lineno" > 112< / span >   < span class = "keywordflow" > return< / span > < span class = "keyword" > nullptr< / span > ;< / div >
< div class = "line" > < a name = "l00113" > < / a > < span class = "lineno" > 113< / span >   < span class = "keyword" > auto< / span > prev_iter = std::prev(iter);< / div >
< div class = "line" > < a name = "l00114" > < / a > < span class = "lineno" > 114< / span >   DCHECK(prev_iter != unpromoted_.end());< / div >
< div class = "line" > < a name = "l00115" > < / a > < span class = "lineno" > 115< / span >   < / div >
< div class = "line" > < a name = "l00116" > < / a > < span class = "lineno" > 116< / span >   std::shared_ptr< CueEvent> cue = prev_iter-> second;< / div >
< div class = "line" > < a name = "l00117" > < / a > < span class = "lineno" > 117< / span >   cue-> time_in_seconds = time_in_seconds;< / div >
< div class = "line" > < a name = "l00118" > < / a > < span class = "lineno" > 118< / span >   < / div >
< div class = "line" > < a name = "l00119" > < / a > < span class = "lineno" > 119< / span >   promoted_[time_in_seconds] = cue;< / div >
< div class = "line" > < a name = "l00120" > < / a > < span class = "lineno" > 120< / span >   < span class = "comment" > // Remove all unpromoted cues up to the cue that was just promoted.< / span > < / div >
< div class = "line" > < a name = "l00121" > < / a > < span class = "lineno" > 121< / span >   < span class = "comment" > // User may provide multiple cue points at the same or similar timestamps. The< / span > < / div >
< div class = "line" > < a name = "l00122" > < / a > < span class = "lineno" > 122< / span >   < span class = "comment" > // extra unused cues are simply ignored.< / span > < / div >
< div class = "line" > < a name = "l00123" > < / a > < span class = "lineno" > 123< / span >   unpromoted_.erase(unpromoted_.begin(), iter);< / div >
< div class = "line" > < a name = "l00124" > < / a > < span class = "lineno" > 124< / span >   < / div >
< div class = "line" > < a name = "l00125" > < / a > < span class = "lineno" > 125< / span >   < span class = "comment" > // Wake up other threads that may be waiting.< / span > < / div >
< div class = "line" > < a name = "l00126" > < / a > < span class = "lineno" > 126< / span >   sync_condition_.Broadcast();< / div >
< div class = "line" > < a name = "l00127" > < / a > < span class = "lineno" > 127< / span >   < span class = "keywordflow" > return< / span > std::move(cue);< / div >
< div class = "line" > < a name = "l00128" > < / a > < span class = "lineno" > 128< / span >   }< / div >
< div class = "line" > < a name = "l00129" > < / a > < span class = "lineno" > 129< / span >   < / div >
< div class = "line" > < a name = "l00130" > < / a > < span class = "lineno" > 130< / span >   } < span class = "comment" > // namespace media< / span > < / div >
< div class = "line" > < a name = "l00131" > < / a > < span class = "lineno" > 131< / span >   } < span class = "comment" > // namespace shaka< / span > < / 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 > <!-- fragment --> < / div > <!-- contents -->
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< hr class = "footer" / > < address class = "footer" > < small >
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Generated on Fri Apr 9 2021 21:00:12 for Shaka Packager SDK by  < a href = "https://www.doxygen.org/index.html" > < img class = "footer" src = "../../doxygen.svg" width = "104" height = "31" alt = "doxygen" / > < / a > 1.9.1
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< / small > < / address >
< / body >
< / html >
