V4L2VideoEncodeAccelerator: increase the number of input buffers to 2.

V4L2VideoEncodeAccelerator: increase the number of input buffers to 2.

The default number of input buffer was only one. When encoding
continuously, encoder would starve from input buffers. Change the
default number of input buffers to two to improve performance. From
testing, three input buffers do not improve the performance further.

BUG=chromium:627020
TEST=Run VEA test on CrOS oak, veyron-minnie, nyan-big, and peach-pit.

Committed: https://crrev.com/bcdbb72470c705f4363a4cbe87eb8f9686b55088
Cr-Commit-Position: refs/heads/master@{#410306}

[wuchengli, 2016-08-08 03:59:33]

wuchengli@chromium.org changed reviewers:
+ owenlin@chromium.org, posciak@chromium.org

[wuchengli, 2016-08-08 03:59:34]

PTAL.

[Pawel Osciak, 2016-08-08 04:55:39]

lgtm

[wuchengli, 2016-08-08 04:57:25]

The CQ bit was checked by wuchengli@chromium.org

[commit-bot: I haz the power, 2016-08-08 04:57:47]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-08 06:00:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-08 06:02:04]

Description was changed from

==========
V4L2VideoEncodeAccelerator: increase the number of input buffers to 2.

The default number of input buffer was only one. When encoding
continuously, encoder would starve from input buffers. Change the
default number of input buffers to two to improve performance. From
testing, three input buffers do not improve the performance further.

BUG=chromium:627020
TEST=Run VEA test on CrOS oak, veyron-minnie, nyan-big, and peach-pit.
==========

to

==========
V4L2VideoEncodeAccelerator: increase the number of input buffers to 2.

The default number of input buffer was only one. When encoding
continuously, encoder would starve from input buffers. Change the
default number of input buffers to two to improve performance. From
testing, three input buffers do not improve the performance further.

BUG=chromium:627020
TEST=Run VEA test on CrOS oak, veyron-minnie, nyan-big, and peach-pit.

Committed: https://crrev.com/bcdbb72470c705f4363a4cbe87eb8f9686b55088
Cr-Commit-Position: refs/heads/master@{#410306}
==========

[commit-bot: I haz the power, 2016-08-08 06:02:05]

Patchset 1 (id:??) landed as
https://crrev.com/bcdbb72470c705f4363a4cbe87eb8f9686b55088
Cr-Commit-Position: refs/heads/master@{#410306}