2017-03-27 19:39:08 +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_ebd49ab0652c2e9158bbb57c55382729.html" > trick_play< / a > < / li > < / ul >
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< div class = "title" > trick_play_handler.h< / 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 2017 Google Inc. All rights reserved.< / span > < / div >
< div class = "line" > < a name = "l00002" > < / a > < span class = "lineno" > 2< / span >   < span class = "comment" > //< / span > < / div >
< div class = "line" > < a name = "l00003" > < / a > < span class = "lineno" > 3< / span >   < span class = "comment" > // Use of this source code is governed by a BSD-style< / span > < / div >
< div class = "line" > < a name = "l00004" > < / a > < span class = "lineno" > 4< / span >   < span class = "comment" > // license that can be found in the LICENSE file or at< / span > < / div >
< div class = "line" > < a name = "l00005" > < / a > < span class = "lineno" > 5< / span >   < span class = "comment" > // https://developers.google.com/open-source/licenses/bsd< / span > < / div >
< div class = "line" > < a name = "l00006" > < / a > < span class = "lineno" > 6< / span >   < / div >
< div class = "line" > < a name = "l00007" > < / a > < span class = "lineno" > 7< / span >   < span class = "preprocessor" > #ifndef PACKAGER_MEDIA_BASE_TRICK_PLAY_HANDLER_H_< / span > < / div >
< div class = "line" > < a name = "l00008" > < / a > < span class = "lineno" > 8< / span >   < span class = "preprocessor" > < / span > < span class = "preprocessor" > #define PACKAGER_MEDIA_BASE_TRICK_PLAY_HANDLER_H_< / span > < / div >
< div class = "line" > < a name = "l00009" > < / a > < span class = "lineno" > 9< / span >   < span class = "preprocessor" > < / span > < / div >
< div class = "line" > < a name = "l00010" > < / a > < span class = "lineno" > 10< / span >   < span class = "preprocessor" > #include " packager/media/base/media_handler.h" < / 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 = "keyword" > namespace < / span > shaka {< / div >
< div class = "line" > < a name = "l00013" > < / a > < span class = "lineno" > 13< / span >   < span class = "keyword" > namespace < / span > media {< / div >
< div class = "line" > < a name = "l00014" > < / a > < span class = "lineno" > 14< / span >   < / div >
< div class = "line" > < a name = "l00015" > < / a > < span class = "lineno" > < a class = "line" href = "../../d5/d72/structshaka_1_1media_1_1TrickPlayOptions.html" > 15< / a > < / span >   < span class = "keyword" > struct < / span > < a class = "code" href = "../../d5/d72/structshaka_1_1media_1_1TrickPlayOptions.html" > TrickPlayOptions< / a > {< / div >
< div class = "line" > < a name = "l00023" > < / a > < span class = "lineno" > < a class = "line" href = "../../d5/d72/structshaka_1_1media_1_1TrickPlayOptions.html#a77537f303baab5b1f04f91ea60c6d6c4" > 23< / a > < / span >   std::vector< int16_t> < a class = "code" href = "../../d5/d72/structshaka_1_1media_1_1TrickPlayOptions.html#a77537f303baab5b1f04f91ea60c6d6c4" > trick_play_rates< / a > ;< / div >
< div class = "line" > < a name = "l00024" > < / a > < span class = "lineno" > 24< / span >   };< / div >
< div class = "line" > < a name = "l00025" > < / a > < span class = "lineno" > 25< / span >   < / div >
< div class = "line" > < a name = "l00028" > < / a > < span class = "lineno" > 28< / span >   < span class = "comment" > // The stream data in trick play stream is not a simple duplicate. Some< / span > < / div >
< div class = "line" > < a name = "l00029" > < / a > < span class = "lineno" > 29< / span >   < span class = "comment" > // information need to be updated, including trick_play_rate in< / span > < / div >
< div class = "line" > < a name = "l00030" > < / a > < span class = "lineno" > 30< / span >   < span class = "comment" > // VideoStreamInfo, the duration in MediaSample (which makes sure there is no< / span > < / div >
< div class = "line" > < a name = "l00031" > < / a > < span class = "lineno" > 31< / span >   < span class = "comment" > // gap between the media sample dts). Since the duration information can be< / span > < / div >
< div class = "line" > < a name = "l00032" > < / a > < span class = "lineno" > 32< / span >   < span class = "comment" > // determined after getting the next media sample, a queue is used to cache the< / span > < / div >
< div class = "line" > < a name = "l00033" > < / a > < span class = "lineno" > 33< / span >   < span class = "comment" > // input stream data before the next key frame.< / span > < / div >
< div class = "line" > < a name = "l00034" > < / a > < span class = "lineno" > < a class = "line" href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html" > 34< / a > < / span >   < span class = "keyword" > class < / span > < a class = "code" href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html" > TrickPlayHandler< / a > : < span class = "keyword" > public< / span > < a class = "code" href = "../../da/dfd/classshaka_1_1media_1_1MediaHandler.html" > MediaHandler< / a > {< / div >
< div class = "line" > < a name = "l00035" > < / a > < span class = "lineno" > 35< / span >   < span class = "keyword" > public< / span > :< / div >
< div class = "line" > < a name = "l00036" > < / a > < span class = "lineno" > 36< / span >   < span class = "keyword" > explicit< / span > < a class = "code" href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html" > TrickPlayHandler< / a > (< span class = "keyword" > const< / span > < a class = "code" href = "../../d5/d72/structshaka_1_1media_1_1TrickPlayOptions.html" > TrickPlayOptions< / a > & trick_play_options);< / div >
< div class = "line" > < a name = "l00037" > < / a > < span class = "lineno" > 37< / span >   ~< a class = "code" href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html" > TrickPlayHandler< / a > () < span class = "keyword" > override< / span > ;< / div >
< div class = "line" > < a name = "l00038" > < / a > < span class = "lineno" > 38< / span >   < / div >
< div class = "line" > < a name = "l00039" > < / a > < span class = "lineno" > 39< / span >   < span class = "keyword" > protected< / span > :< / div >
< div class = "line" > < a name = "l00042" > < / a > < span class = "lineno" > 42< / span >   < a class = "code" href = "../../d0/d93/classshaka_1_1media_1_1Status.html" > Status< / a > < a class = "code" href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html#a3fd2fae199e0a9607e83e02724896c10" > InitializeInternal< / a > () < span class = "keyword" > override< / span > ;< / div >
< div class = "line" > < a name = "l00043" > < / a > < span class = "lineno" > 43< / span >   < a class = "code" href = "../../d0/d93/classshaka_1_1media_1_1Status.html" > Status< / a > < a class = "code" href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html#afdd13bb4e762c4b904ed75b268359757" > Process< / a > (std::unique_ptr< StreamData> stream_data) < span class = "keyword" > override< / span > ;< / div >
< div class = "line" > < a name = "l00044" > < / a > < span class = "lineno" > 44< / span >   < span class = "keywordtype" > bool< / span > < a class = "code" href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html#addbe1be8281bceb8e84df865424dded3" > ValidateOutputStreamIndex< / a > (< span class = "keywordtype" > size_t< / span > stream_index) < span class = "keyword" > const override< / span > ;< / div >
< div class = "line" > < a name = "l00045" > < / a > < span class = "lineno" > 45< / span >   < a class = "code" href = "../../d0/d93/classshaka_1_1media_1_1Status.html" > Status< / a > < a class = "code" href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html#a9a6c29c88fdeb667d5592142d6815bfa" > OnFlushRequest< / a > (< span class = "keywordtype" > size_t< / span > input_stream_index) < span class = "keyword" > override< / 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 >   < span class = "keyword" > private< / span > :< / div >
< div class = "line" > < a name = "l00049" > < / a > < span class = "lineno" > 49< / span >   < span class = "keyword" > friend< / span > < span class = "keyword" > class < / span > TrickPlayHandlerTest;< / div >
< div class = "line" > < a name = "l00050" > < / a > < span class = "lineno" > 50< / span >   < / div >
< div class = "line" > < a name = "l00051" > < / a > < span class = "lineno" > 51< / span >   < span class = "comment" > // Process the cached stream data for one trick play stream.< / span > < / div >
< div class = "line" > < a name = "l00052" > < / a > < span class = "lineno" > 52< / span >   < span class = "comment" > // The cached data is dispatched to the |output_stream_index|.< / span > < / div >
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< div class = "line" > < a name = "l00053" > < / a > < span class = "lineno" > 53< / span >   < a class = "code" href = "../../d0/d93/classshaka_1_1media_1_1Status.html" > Status< / a > ProcessCachedStreamData(< / div >
< div class = "line" > < a name = "l00054" > < / a > < span class = "lineno" > 54< / span >   < span class = "keywordtype" > size_t< / span > output_stream_index,< / div >
< div class = "line" > < a name = "l00055" > < / a > < span class = "lineno" > 55< / span >   std::deque< std::shared_ptr< StreamData> > * cached_stream_data);< / 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 >   < span class = "comment" > // Process a single stream data. Depending on the stream data type, some< / span > < / div >
< div class = "line" > < a name = "l00058" > < / a > < span class = "lineno" > 58< / span >   < span class = "comment" > // information needs to be updated.< / span > < / div >
< div class = "line" > < a name = "l00059" > < / a > < span class = "lineno" > 59< / span >   < span class = "comment" > // Decoding timestamp for current key media sample. It is used for calculating< / span > < / div >
< div class = "line" > < a name = "l00060" > < / a > < span class = "lineno" > 60< / span >   < span class = "comment" > // the duration of previous key media sample, to make sure there is no gap< / span > < / div >
< div class = "line" > < a name = "l00061" > < / a > < span class = "lineno" > 61< / span >   < span class = "comment" > // between two key media samples.< / span > < / div >
< div class = "line" > < a name = "l00062" > < / a > < span class = "lineno" > 62< / span >   < a class = "code" href = "../../d0/d93/classshaka_1_1media_1_1Status.html" > Status< / a > ProcessOneStreamData(< span class = "keywordtype" > size_t< / span > output_stream_index,< / div >
< div class = "line" > < a name = "l00063" > < / a > < span class = "lineno" > 63< / span >   < span class = "keyword" > const< / span > std::shared_ptr< StreamData> & stream_data);< / 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 = "keyword" > const< / span > < a class = "code" href = "../../d5/d72/structshaka_1_1media_1_1TrickPlayOptions.html" > TrickPlayOptions< / a > trick_play_options_;< / div >
< div class = "line" > < a name = "l00066" > < / a > < span class = "lineno" > 66< / span >   < / div >
< div class = "line" > < a name = "l00067" > < / a > < span class = "lineno" > 67< / span >   < a class = "code" href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html" > TrickPlayHandler< / a > (< span class = "keyword" > const< / span > < a class = "code" href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html" > TrickPlayHandler< / a > & ) = < span class = "keyword" > delete< / span > ;< / div >
< div class = "line" > < a name = "l00068" > < / a > < span class = "lineno" > 68< / span >   < a class = "code" href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html" > TrickPlayHandler< / a > & operator=(< span class = "keyword" > const< / span > < a class = "code" href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html" > TrickPlayHandler< / a > & ) = < span class = "keyword" > delete< / span > ;< / div >
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< div class = "line" > < a name = "l00069" > < / a > < span class = "lineno" > 69< / span >   < / div >
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< div class = "line" > < a name = "l00071" > < / a > < span class = "lineno" > 71< / span >   uint32_t total_key_frames_ = 0;< / div >
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< 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 >   < span class = "comment" > // End timestamp of the previous processed media_sample, which is |dts| +< / span > < / div >
< div class = "line" > < a name = "l00074" > < / a > < span class = "lineno" > 74< / span >   < span class = "comment" > // |duration|. The duration of key frame in trick play stream is updated based< / span > < / div >
< div class = "line" > < a name = "l00075" > < / a > < span class = "lineno" > 75< / span >   < span class = "comment" > // on this timestamp.< / span > < / div >
< div class = "line" > < a name = "l00076" > < / a > < span class = "lineno" > 76< / span >   int64_t prev_sample_end_timestamp_ = 0;< / div >
< div class = "line" > < a name = "l00077" > < / a > < span class = "lineno" > 77< / span >   < / div >
< div class = "line" > < a name = "l00078" > < / a > < span class = "lineno" > 78< / span >   < span class = "comment" > // The data in output streams should be in the same order as in the input< / span > < / div >
< div class = "line" > < a name = "l00079" > < / a > < span class = "lineno" > 79< / span >   < span class = "comment" > // stream. Cache the stream data before next key frame so that we can< / span > < / div >
< div class = "line" > < a name = "l00080" > < / a > < span class = "lineno" > 80< / span >   < span class = "comment" > // determine the duration for the current key frame. Since one key frame may< / span > < / div >
< div class = "line" > < a name = "l00081" > < / a > < span class = "lineno" > 81< / span >   < span class = "comment" > // be dispatched to different trick play stream, each trick play stream need< / span > < / div >
< div class = "line" > < a name = "l00082" > < / a > < span class = "lineno" > 82< / span >   < span class = "comment" > // its own queue to handle the synchronization.< / span > < / div >
< div class = "line" > < a name = "l00083" > < / a > < span class = "lineno" > 83< / span >   < span class = "comment" > // TODO(hmchen): Use one queue and multiple iterators, instead of multiple< / span > < / div >
< div class = "line" > < a name = "l00084" > < / a > < span class = "lineno" > 84< / span >   < span class = "comment" > // queues.< / span > < / div >
< div class = "line" > < a name = "l00085" > < / a > < span class = "lineno" > 85< / span >   std::vector< std::deque< std::shared_ptr< StreamData> > > cached_stream_data_;< / div >
< div class = "line" > < a name = "l00086" > < / a > < span class = "lineno" > 86< / span >   };< / div >
< div class = "line" > < a name = "l00087" > < / a > < span class = "lineno" > 87< / span >   < / div >
< div class = "line" > < a name = "l00088" > < / a > < span class = "lineno" > 88< / span >   } < span class = "comment" > // namespace media< / span > < / div >
< div class = "line" > < a name = "l00089" > < / a > < span class = "lineno" > 89< / span >   } < span class = "comment" > // namespace shaka< / span > < / div >
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< div class = "line" > < a name = "l00090" > < / a > < span class = "lineno" > 90< / span >   < / div >
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< div class = "line" > < a name = "l00091" > < / a > < span class = "lineno" > 91< / span >   < span class = "preprocessor" > #endif // PACKAGER_MEDIA_BASE_TRICK_PLAY_HANDLER_H_< / span > < / div >
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< div class = "ttc" id = "classshaka_1_1media_1_1TrickPlayHandler_html" > < div class = "ttname" > < a href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html" > shaka::media::TrickPlayHandler< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/ddc/trick__play__handler_8h_source.html#l00034" > trick_play_handler.h:34< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1MediaHandler_html" > < div class = "ttname" > < a href = "../../da/dfd/classshaka_1_1media_1_1MediaHandler.html" > shaka::media::MediaHandler< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d3/d93/media__handler_8h_source.html#l00071" > media_handler.h:71< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1TrickPlayHandler_html_addbe1be8281bceb8e84df865424dded3" > < div class = "ttname" > < a href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html#addbe1be8281bceb8e84df865424dded3" > shaka::media::TrickPlayHandler::ValidateOutputStreamIndex< / a > < / div > < div class = "ttdeci" > bool ValidateOutputStreamIndex(size_t stream_index) const override< / div > < div class = "ttdoc" > Validate if the stream at the specified index actually exists. < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d3/d87/trick__play__handler_8cc_source.html#l00092" > trick_play_handler.cc:92< / a > < / div > < / div >
< div class = "ttc" id = "structshaka_1_1media_1_1TrickPlayOptions_html" > < div class = "ttname" > < a href = "../../d5/d72/structshaka_1_1media_1_1TrickPlayOptions.html" > shaka::media::TrickPlayOptions< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/ddc/trick__play__handler_8h_source.html#l00015" > trick_play_handler.h:15< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1TrickPlayHandler_html_a9a6c29c88fdeb667d5592142d6815bfa" > < div class = "ttname" > < a href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html#a9a6c29c88fdeb667d5592142d6815bfa" > shaka::media::TrickPlayHandler::OnFlushRequest< / a > < / div > < div class = "ttdeci" > Status OnFlushRequest(size_t input_stream_index) override< / div > < div class = "ttdoc" > Event handler for flush request at the specific input stream index. < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d3/d87/trick__play__handler_8cc_source.html#l00098" > trick_play_handler.cc:98< / a > < / div > < / div >
< div class = "ttc" id = "structshaka_1_1media_1_1TrickPlayOptions_html_a77537f303baab5b1f04f91ea60c6d6c4" > < div class = "ttname" > < a href = "../../d5/d72/structshaka_1_1media_1_1TrickPlayOptions.html#a77537f303baab5b1f04f91ea60c6d6c4" > shaka::media::TrickPlayOptions::trick_play_rates< / a > < / div > < div class = "ttdeci" > std::vector< int16_t > trick_play_rates< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../dd/ddc/trick__play__handler_8h_source.html#l00023" > trick_play_handler.h:23< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1Status_html" > < div class = "ttname" > < a href = "../../d0/d93/classshaka_1_1media_1_1Status.html" > shaka::media::Status< / a > < / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d1/d13/status_8h_source.html#l00088" > status.h:88< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1TrickPlayHandler_html_a3fd2fae199e0a9607e83e02724896c10" > < div class = "ttname" > < a href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html#a3fd2fae199e0a9607e83e02724896c10" > shaka::media::TrickPlayHandler::InitializeInternal< / a > < / div > < div class = "ttdeci" > Status InitializeInternal() override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d3/d87/trick__play__handler_8cc_source.html#l00025" > trick_play_handler.cc:25< / a > < / div > < / div >
< div class = "ttc" id = "classshaka_1_1media_1_1TrickPlayHandler_html_afdd13bb4e762c4b904ed75b268359757" > < div class = "ttname" > < a href = "../../db/dea/classshaka_1_1media_1_1TrickPlayHandler.html#afdd13bb4e762c4b904ed75b268359757" > shaka::media::TrickPlayHandler::Process< / a > < / div > < div class = "ttdeci" > Status Process(std::unique_ptr< StreamData > stream_data) override< / div > < div class = "ttdef" > < b > Definition:< / b > < a href = "../../d3/d87/trick__play__handler_8cc_source.html#l00029" > trick_play_handler.cc:29< / a > < / div > < / div >
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2017-03-27 19:39:08 +00:00
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