Fix input frames being dropped when the h.264 DXVA decoder detects a configuration change.

Fix input frames being dropped when the h.264 DXVA decoder detects a configuration change.

The patch to detect a mid stream configuration change and reinitialize the decoder introduced a bug while
processing stream changes, where in input frames coming in for decoding while processing the configuration change
were dropped causing the video to jitter or not display correctly.

Fix is to not drop the input frames when we are processing a configuration change and instead add the input frames
to the pending input list which is processed after the configuration change is completed. To detect a configuration
change, we enter a new state kConfigChange which then resets back to kNormal after initialization.

BUG=594266
Committed: https://crrev.com/c14bd2e1f69db8316fac39eb8e71b9103f0dd223
Cr-Commit-Position: refs/heads/master@{#382475}

[ananta, 2016-03-22 00:50:03]

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

[sandersd (OOO until July 31), 2016-03-22 01:03:05]

lgtm

[ananta, 2016-03-22 01:08:18]

The CQ bit was checked by ananta@chromium.org

[commit-bot: I haz the power, 2016-03-22 01:08:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1817353002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1817353002/1

[commit-bot: I haz the power, 2016-03-22 02:14:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-22 02:16:34]

Description was changed from

==========
Fix input frames being dropped when the h.264 DXVA decoder detects a
configuration change.

The patch to detect a mid stream configuration change and reinitialize the
decoder introduced a bug while
processing stream changes, where in input frames coming in for decoding while
processing the configuration change
were dropped causing the video to jitter or not display correctly.

Fix is to not drop the input frames when we are processing a configuration
change and instead add the input frames
to the pending input list which is processed after the configuration change is
completed. To detect a configuration
change, we enter a new state kConfigChange which then resets back to kNormal
after initialization.

BUG=594266
==========

to

==========
Fix input frames being dropped when the h.264 DXVA decoder detects a
configuration change.

The patch to detect a mid stream configuration change and reinitialize the
decoder introduced a bug while
processing stream changes, where in input frames coming in for decoding while
processing the configuration change
were dropped causing the video to jitter or not display correctly.

Fix is to not drop the input frames when we are processing a configuration
change and instead add the input frames
to the pending input list which is processed after the configuration change is
completed. To detect a configuration
change, we enter a new state kConfigChange which then resets back to kNormal
after initialization.

BUG=594266

Committed: https://crrev.com/c14bd2e1f69db8316fac39eb8e71b9103f0dd223
Cr-Commit-Position: refs/heads/master@{#382475}
==========

[commit-bot: I haz the power, 2016-03-22 02:16:35]

Patchset 1 (id:??) landed as
https://crrev.com/c14bd2e1f69db8316fac39eb8e71b9103f0dd223
Cr-Commit-Position: refs/heads/master@{#382475}