Vp8Parser: Zero-initialize segment feature data when required

Vp8Parser: Zero-initialize segment feature data when required

When segmentation is enabled and update_segment_feature_data flag is
true, but no actual update value is provided in the stream, the value
should be assigned the default "0", instead of what was carried over
from previous frame. This applies to both quantizer and loop filter
update values.

BUG=chrome-os-partner:48886
TEST=Sample video with segment feature data
updates,crosvideo.appspot,vdatest

Committed: https://crrev.com/c6e09d91e9bdbd5cb4877ce6f5de55a2747dfc20
Cr-Commit-Position: refs/heads/master@{#394616}

[Pawel Osciak, 2016-05-18 03:58:40]

posciak@chromium.org changed reviewers:
+ kcwu@chromium.org

[Pawel Osciak, 2016-05-18 03:58:41]

ptal

[Pawel Osciak, 2016-05-18 07:53:14]

posciak@chromium.org changed reviewers:
+ sandersd@chromium.org

[kcwu, 2016-05-18 08:40:05]

lgtm

[Pawel Osciak, 2016-05-18 08:41:21]

The CQ bit was checked by posciak@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-05-18 08:41:29]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1992663002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1992663002/1

[commit-bot: I haz the power, 2016-05-18 10:59:49]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-05-18 10:59:50]

Dry run: This issue passed the CQ dry run.

[sandersd (OOO until July 31), 2016-05-18 23:50:46]

lgtm

[Pawel Osciak, 2016-05-19 00:19:05]

The CQ bit was checked by posciak@chromium.org

[commit-bot: I haz the power, 2016-05-19 00:19:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1992663002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1992663002/1

[commit-bot: I haz the power, 2016-05-19 00:24:40]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-19 00:26:14]

Description was changed from

==========
Vp8Parser: Zero-initialize segment feature data when required

When segmentation is enabled and update_segment_feature_data flag is
true, but no actual update value is provided in the stream, the value
should be assigned the default "0", instead of what was carried over
from previous frame. This applies to both quantizer and loop filter
update values.

BUG=chrome-os-partner:48886
TEST=Sample video with segment feature data
updates,crosvideo.appspot,vdatest
==========

to

==========
Vp8Parser: Zero-initialize segment feature data when required

When segmentation is enabled and update_segment_feature_data flag is
true, but no actual update value is provided in the stream, the value
should be assigned the default "0", instead of what was carried over
from previous frame. This applies to both quantizer and loop filter
update values.

BUG=chrome-os-partner:48886
TEST=Sample video with segment feature data
updates,crosvideo.appspot,vdatest

Committed: https://crrev.com/c6e09d91e9bdbd5cb4877ce6f5de55a2747dfc20
Cr-Commit-Position: refs/heads/master@{#394616}
==========

[commit-bot: I haz the power, 2016-05-19 00:26:16]

Patchset 1 (id:??) landed as
https://crrev.com/c6e09d91e9bdbd5cb4877ce6f5de55a2747dfc20
Cr-Commit-Position: refs/heads/master@{#394616}