Nicholas Nethercote 34dcc7b852 Bug 1299384 - Use MOZ_MUST_USE with NS_warn_if_impl(). r=erahm.
This change avoids lots of false positives for Coverity's CHECKED_RETURN
warning, caused by NS_WARN_IF's current use in both statement-style and
expression-style.

In the case where the code within the NS_WARN_IF has side-effects, I made the
following change.

> NS_WARN_IF(NS_FAILED(FunctionWithSideEffects()));
> -->
> Unused << NS_WARN_IF(NS_FAILED(FunctionWithSideEffects()));

In the case where the code within the NS_WARN_IF lacks side-effects, I made the
following change.

> NS_WARN_IF(!condWithoutSideEffects);
> -->
> NS_WARNING_ASSERTION(condWithoutSideEffects, "msg");

This has two improvements.
- The condition is not evaluated in non-debug builds.
- The sense of the condition is inverted to the familiar "this condition should
  be true" sense used in assertions.

A common variation on the side-effect-free case is the following.

> nsresult rv = Fn();
> NS_WARN_IF_(NS_FAILED(rv));
> -->
> DebugOnly<nsresult rv> = Fn();
> NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Fn failed");

--HG--
extra : rebase_source : 58788245021096efa8372a9dc1d597a611d45611
2016-09-02 17:12:24 +10:00
..

This README file details from where some of the camcorder source files were derived from and how to apply the provided patch file to get the updated files for B2G.
---------------------------------

Following is the list of B2G files which were derived from an android ics_chocolate build. It also shows the corresponding locations where the original source files can be found:

GonkRecoder.cpp:
https://www.codeaurora.org/gitweb/quic/la/?p=platform/frameworks/base.git;a=blob;f=media/libmediaplayerservice/StagefrightRecorder.cpp;hb=ef1672482a9c2b88d8017927df68144fee42626c

GonkRecorder.h:
https://www.codeaurora.org/gitweb/quic/la/?p=platform/frameworks/base.git;a=blob;f=media/libmediaplayerservice/StagefrightRecorder.h;hb=e3682213bcd3fe43b059e00f0fe4dbebc3f3c35d

GonkCameraSource.cpp:
https://www.codeaurora.org/gitweb/quic/la/?p=platform/frameworks/base.git;a=blob;f=media/libstagefright/CameraSource.cpp;hb=7fa677babfee9c241a131b22c9c1c5ab512ef2d2

GonkCameraSource.h:
https://www.codeaurora.org/gitweb/quic/la/?p=platform/frameworks/base.git;a=blob;f=include/media/stagefright/CameraSource.h;hb=96af14d9b013496accf40a85a66fefcba3ac0111

AudioParameter.cpp:
https://www.codeaurora.org/gitweb/quic/la/?p=platform/frameworks/base.git;a=blob;f=media/libmedia/AudioParameter.cpp;hb=4dc22e77cfd2a1c3671e5646ee87c5e4c15596a0

GonkCameraListener.h:
https://www.codeaurora.org/gitweb/quic/la/?p=platform/frameworks/base.git;a=blob;f=include/camera/Camera.h;hb=796f35e408d9dca386f90d8fbde80471ac011fa6

There were quite a few changes done to the above listed sources to support camcorder on B2G platform.
update.patch lists the changes on top of the original files.
update.sh shell script copies the files from an android tree and applies the patch to get updated files for B2G.