Age | Commit message (Collapse) | Author | |
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2014-01-31 | vp9 decoder: row-based multi-threaded loopfilter | Yunqing Wang | |
Implemented parallel loopfiltering, which uses existing tile- decoding threads. Each thread works on one row, and when that row is loopfiltered, it moves to next unattended row. To ensure the correct filtering order, threads are synchronized and one superblock is filtered only if the superblocks it depends on are filtered already. To reduce synchronization overhead and speed up the decoder, we use nsync > 1 for high resolution. Performance tests: 1. on desktop: 8-tile 4k video using 8 threads, speedup: 70% - 80% 4-tile HD video using 4 threads, speedup: ~35% 2. on mobile device(Nexus 7): 4-tile 1080p video using 4 threads, speedup: 18% - 25% 4-tile 1080p video using 2 threads, speedup: 10% - 15% Change-Id: If54b4a11960dd706c22d5ad145ad94156031f36a | |||
2013-10-17 | vp9_thread: add vp9_worker_execute() | James Zern | |
cherry-picked from: commit 988b70844e03efcfcc075a9bc25d846670494f36 Author: Pascal Massimino <pascal.massimino@gmail.com> Date: Fri Aug 2 11:15:16 2013 -0700 add WebPWorkerExecute() for convenient bypass This is mainly for re-using the worker structs without using the thread. Change-Id: I8e1be29e53874ef425b15c192fb68036b4c0a359 Original source: http://git.chromium.org/webm/libwebp.git 100644 blob c0d318aee628fdf9ba4876451a28aa978f1066b8 src/utils/thread.c 100644 blob c2b92c9fe353f8e514f78922f3d237204a9cbc66 src/utils/thread.h Change-Id: I13fe92b1e94062bb99fdeeb7cb0b4b0575d27793 | |||
2013-10-05 | NOLINT issue with headers that's hard to avoid do to config.h issue | Jim Bankoski | |
Change-Id: Ibd0b3414cdea05bc2fd6d0aa35808e44b3db8d96 | |||
2013-08-05 | vp9/decoder: add thread worker | James Zern | |
vp9/decoder/vp9_thread.[hc] Original source: http://git.chromium.org/webm/libwebp.git 100644 blob b1615d0fb8d311666b2fa4561076c62d72c2e3ff src/utils/thread.c 100644 blob 13a61a4c84194c3374080cbf03d881d3cd6af40d src/utils/thread.h Local modifications: - s/WebP/VP9/g - camelcase functions -> lower with _'s Change-Id: Ib6932640ee34f8b4782c6fbd15864a59d5d4c5fe |