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VP9: Use 2 threads on low res on ARM.

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WebRTC standalone tests show 24% speed up on foreman_cif, 16% speed up
on a 240p clip and 11% speed up on Bridge_r180.

Bug: None
Change-Id: I433b7a8841bd9df2402575f72dd1984cc5e011a9
Reviewed-on: https://webrtc-review.googlesource.com/29260
Commit-Queue: Jerome Jiang <jianj@google.com>
Reviewed-by: Magnus Flodman <mflodman@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21096}
This commit is contained in:
Jerome Jiang
2017-12-05 10:44:35 -08:00
committed by Commit Bot
parent 111e883ad2
commit 831af370fe
1 changed files with 7 additions and 0 deletions
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7
modules/video_coding/codecs/vp9/vp9_impl.cc
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@ -385,6 +385,13 @@ int VP9EncoderImpl::NumberOfThreads(int width,
} else if (width * height >= 640 * 360 && number_of_cores > 2) {
return 2;
} else {
// Use 2 threads for low res on ARM.
#if defined(WEBRTC_ARCH_ARM) || defined(WEBRTC_ARCH_ARM64) || \
defined(WEBRTC_ANDROID)
if (width * height >= 320 * 180 && number_of_cores > 2) {
return 2;
}
#endif
// 1 thread less than VGA.
return 1;
}