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Change-Id: I4f10e4af6f0b5fb0b90513ad516b36b444d3bd68
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If the seek operation of underlying MediaDataSource implementation is
expensive and each read is relatively small (e.g. Live MPEG2 TS
stream), current TinyCacheSource implementation requests seek too
frequently.
Bug: 21764375
Change-Id: Ic620bf027bc4ef48822549c83c5c98109986884a
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Without a cache the mediaserver does a lot of small reads which result
in round trips through binder and jni to the app MediaDataSource.
On a Nexus 5 I measured time to first frame from MediaPlayer for
1) 1350kbps h264, and 2) 20480kbps vp8. Without a cache, MediaDataSource
was ~250ms slower than an fd. With a 2kb cache it's 30ms slower for (1)
and 70ms slower for (2).
Change-Id: If1e811db7b853c4f79430603318d4744ac30acb9
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Change-Id: I81f438ae444f04c12ae27ae4ef6d073033de172c
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This allows apps to implement MediaDataSource, which is modeled on
stagefright's DataSource, to supply media data to the framework. This
was already implemented for MediaExtractor, but it was renamed from
DataSource.
MediaExtractor, MediaPlayer and MediaMetadataRetriever each have a new
overload: #setDataSource(android.media.MediaDataSource)
Only NuPlayer supports this new data source.
The change introduces:
* IDataSource: The binder interface for DataSource.
* JMediaDataSource: The native counterpart to the java interface. It
implements IDataSource.
* CallbackDataSource: A stagefright DataSource that wraps an
IDataSource.
Change-Id: Ib3c944b49cc8a792c8eb9c85e5015c07f298ebc1
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