| 0c1407f79ef36422330c2003a608d37df714256b |
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03-May-2018 |
Chong Zhang <chz@google.com> |
Decode one row of tiles at a time for image that has tiles
Add an api to IMediaMetadataRetriever to decode image rect.
It will reuse the same full frame IMemory, and decode only
the requested rect. For now, StagefrightMetadataRetriever
will only allow decoding of rect that's a full row of tiles,
and the requested must be issued sequentially (i.e. no
arbitrary rects). When the extract side is fixed to allow
seeking by tiles, it can be extended to allow arbitrary
rects.
This allows HeifDecoderImpl (on client side) to start
processing the getScanlines in parallel with the decoding.
Test: CTS MediaMetadataRetrieverTest;
Manual testing of HEIF decoding of files with or without tiles;
Manual testing of HEIF thumbnails generation in Downloads app.
bug: 78475896
Change-Id: I820b21cdf33f80593ee6092d8e1ba68b3beb65dd
/frameworks/av/media/libheif/HeifDecoderImpl.h
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| d3e0d861aa68a7ef129fe228595bff734448ebc8 |
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03-Oct-2017 |
Chong Zhang <chz@google.com> |
heif: fixes for image sequences and dual-function files
Adding support for two new sets of APIs on MediaMetadataRetriever:
- getImageAtIndex() and getPrimaryImage()
- getFrameAtIndex() and getFramesAtIndex()
Outline of changes:
- Proper indexing of all displayable still images, so that they
can be retrieved by getImageAtIndex()
- Exposing still images as "image/x.android.heic" tracks in
MediaExtractor with necessary descriptive keys (such as "grid-*")
- Support to retrieve video frames by absolute index instead
of timestamps, as image use cases mostly are interested in
getting the images and care less about timing.
- Support to retrieve video frames in batches because retrieving
one frame at a time is inefficient.
- Refactor image / frame decoding code into FrameDecoder, and split
still image decoding and video sequence decoding into to sub
classes to facilite future development.
bug: 63633199
test:
cts-tradefed run cts-dev --module CtsMediaTestCases --compatibility:module-arg CtsMediaTestCases:include-annotation:android.platform.test.annotations.RequiresDevice
Change-Id: I2fe8519fb6907f315a8b513921fc1cc7f436e28d
/frameworks/av/media/libheif/HeifDecoderImpl.h
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| 3f3ffab372ea65f5d658166aee1f6bff0faf78d6 |
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23-Aug-2017 |
Chong Zhang <chz@google.com> |
heif: cache the entire stream if possible to support seek
Also, reuse decoding result if decode is called again. Currently
decode only retrieves primary picture, so there is no point to
go to metadata retriever again.
Bug: 64077740
Change-Id: I9243de396957f4d717c386bbaa8692494d624998
/frameworks/av/media/libheif/HeifDecoderImpl.h
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| ea280cb32091e46f3cb5ec68f2c7200913b43168 |
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02-Aug-2017 |
Chong Zhang <chz@google.com> |
heif: adding libheif to be used by skia heif codec
- define platform-independent HeifDecoder interface to be used by
skia to decode heif
- add android implementation of HeifDecoder utilizing media framework
MediaMetadataRetriever.
bug: 64077740
Change-Id: I87d803a16c117ab081adbd7c88c1bdb3c4318d66
/frameworks/av/media/libheif/HeifDecoderImpl.h
|