camera: Don't segfault if we get a NULL parameter

 * Values end up NULL on some drivers, don't crash.

Change-Id: Ic897dbd4629cf3af98c85f93be202c382dde806b
Noise will be heard if audio sample rate not matched with audio track

When audio sample rate which set to audio track is not the same with
the actual pcm data, noise will be heard. Fix the bug when write 8 bit
pcm samples.

Change-Id: Idcb0d7b0e9aaa250dd22b758c8337e23d1706049
Signed-off-by: Ming Zhou <b42586@freescale.com>
Signed-off-by: guoyin.chen <guoyin.chen@freescale.com>
libstagefright: support for disabling buffer metadata

- Metada mode video recording is enabled by default.
- use setprop debug.camcorder.disablemeta 1 to disable metadata mode recording.

Change-Id: I422c49c0ace0c3a3e1f4459c7e4bf29e70af763a
libstagefright: fix indefinate loop in QueryCodec

portFormat.nIndex is being incremented which is not
trustworthy since the nIndex value could be overriden
by the OMX Component,  which causes an indefinate loop
which inturn causes a memory leak and crashes the system.

OMX Component on encore and p970 exhibits this behaviour
(OMX.TI.720P.Decoder). This patch prevents stagefright
freezes when QueryCodec is called during Gallery Thumbnail
generation for videos and Adobe Flash playback.

Change-Id: I825c99ddecacbb927e22ac7d1a53facb26d95ff2

Conflicts:
	media/libstagefright/OMXCodec.cpp
libstagefright: Fix a video lag bug after audio reached EOS.

http://git.insignal.co.kr/samsung/exynos/android/platform/frameworks/av/commit/?h=exynos-jb&id=da4104e5f934633b4ba7fda06bc9ef3ba0f85a31

Change-Id: I14931cad92df48e1233c5a8a704bb18585b1795a