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First modification of multi-thread decoder

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This is the first modification of VP8 multi-thread decoder, which uses
same threads to decode macroblocks and then do loopfiltering for each
frame.

Inspired by Rob Clark, synchronization was done on every 8 macroblocks
instead of every macroblock to reduce lock contention.

Comparing with the original code, this implementation gave about 15%-
20% performance gain while decoding my test clips on a Core2 Quad
platform (Linux).

The work is not done yet.

Test on other platforms are needed.

Change-Id: Ice9ddb0b511af1359b9f71e65066143c04fef3b5
This commit is contained in:
Yunqing Wang
2010-07-29 16:24:26 -04:00
parent 618c7d27a0
commit ba2e107d28
4 changed files with 549 additions and 258 deletions
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1
vp8/decoder/decoderthreading.h
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@@ -18,6 +18,7 @@
extern void vp8_mtdecode_mb_rows(VP8D_COMP *pbi,
MACROBLOCKD *xd);
extern void vp8_mt_loop_filter_frame(VP8D_COMP *pbi);
extern void vp8_stop_lfthread(VP8D_COMP *pbi);
extern void vp8_start_lfthread(VP8D_COMP *pbi);
extern void vp8_decoder_remove_threads(VP8D_COMP *pbi);