NetEq: Fix a negative shift value

NetEq: Fix a negative shift value

In some rare occations (very low energy signal), a shift value happened
to be negative. This is now fixed by using the WEBRTC_SPL_SHIFT_W32,
which in essence checks the sign of the number of shifts and performs a
right or left shift accordingly.

The fix reverts to how the code was written in old NetEq; see
https://chromium.googlesource.com/external/webrtc/+/4d363ae305fa975e7f3ad2a5ca5dbe5e3f101f82/webrtc/modules/audio_coding/neteq/normal.c#165.

BUG=webrtc:5490
Committed: https://crrev.com/6608d9a1aa2b67d320aba0193b37271605aa7786
Cr-Commit-Position: refs/heads/master@{#11546}

[hlundin-webrtc, 2016-02-08 15:41:55]

The CQ bit was checked by henrik.lundin@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2016-02-08 15:42:09]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1675293002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1675293002/1

[commit-bot: I haz the power, 2016-02-08 16:13:23]

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

[commit-bot: I haz the power, 2016-02-08 16:13:24]

Dry run: Try jobs failed on following builders:
  win_x64_rel on tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/win_x64_rel/builds/12356)

[hlundin-webrtc, 2016-02-09 08:20:06]

Updating checksums for win_x64

[hlundin-webrtc, 2016-02-09 09:39:33]

Updating checksums for android and android64

[hlundin-webrtc, 2016-02-09 13:22:55]

Update neteq4_universal_ref_android.pcm

[hlundin-webrtc, 2016-02-09 15:28:24]

henrik.lundin@webrtc.org changed reviewers:
+ ivoc@webrtc.org

[hlundin-webrtc, 2016-02-09 15:28:24]

Ivo, please, take a look.

[hlundin-webrtc, 2016-02-10 09:23:40]

The CQ bit was checked by henrik.lundin@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2016-02-10 09:23:45]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1675293002/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1675293002/60001

[commit-bot: I haz the power, 2016-02-10 10:17:19]

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

[commit-bot: I haz the power, 2016-02-10 10:17:20]

Dry run: This issue passed the CQ dry run.

[ivoc, 2016-02-10 10:39:16]

LGTM

[hlundin-webrtc, 2016-02-10 10:46:33]

The CQ bit was checked by henrik.lundin@webrtc.org

[commit-bot: I haz the power, 2016-02-10 10:46:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1675293002/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1675293002/60001

[commit-bot: I haz the power, 2016-02-10 10:47:56]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2016-02-10 10:48:00]

Description was changed from

==========
NetEq: Fix a negative shift value

In some rare occations (very low energy signal), a shift value happened
to be negative. This is now fixed by using the WEBRTC_SPL_SHIFT_W32,
which in essence checks the sign of the number of shifts and performs a
right or left shift accordingly.

The fix reverts to how the code was written in old NetEq; see
https://chromium.googlesource.com/external/webrtc/+/4d363ae305fa975e7f3ad2a5c....

BUG=webrtc:5490
==========

to

==========
NetEq: Fix a negative shift value

In some rare occations (very low energy signal), a shift value happened
to be negative. This is now fixed by using the WEBRTC_SPL_SHIFT_W32,
which in essence checks the sign of the number of shifts and performs a
right or left shift accordingly.

The fix reverts to how the code was written in old NetEq; see
https://chromium.googlesource.com/external/webrtc/+/4d363ae305fa975e7f3ad2a5c....

BUG=webrtc:5490

Committed: https://crrev.com/6608d9a1aa2b67d320aba0193b37271605aa7786
Cr-Commit-Position: refs/heads/master@{#11546}
==========

[commit-bot: I haz the power, 2016-02-10 10:48:01]

Patchset 4 (id:??) landed as
https://crrev.com/6608d9a1aa2b67d320aba0193b37271605aa7786
Cr-Commit-Position: refs/heads/master@{#11546}