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.

PS2: Disable metadata mode in timelapse mode too.

Change-Id: I422c49c0ace0c3a3e1f4459c7e4bf29e70af763a
libstagefright: Add msm7x30 to the legacy alsa audio check

Change-Id: Ia936d9b04e99d942ee9af37be81e3b81add6698c
libstagefright: Disable multi slice mode

- Disable multi slice mode video encoding for all
  targets

CRs-Fixed: 573731

Change-Id: I5087cbd2b2932b08e2c663be25104d82fc766ad4
libstagefright: Handle error on allocate buffer failure

Set state to error on allocate buffer failure at start(init)
of decoding.

Change-Id: Ice54f2d3f9cb087dd1f8f14913aacb632c4a8f9a
CRs-Fixed: 332373
libstagefright: Update handling of SBR explict siganlling

In case of SBR explict signalling in the bitstream, the core
AAC sample rate is overwritten by extension sample rate.
HW AAC decoder relies on core sample rate to parse the
bitstream when supplied in raw format.
Do not overwrite core sample rate but store it as separate
field in the meta data.

CRs-fixed: 572242

Change-Id: I5c70cfcc40a44bff9f9da4082c6b4dccd7c6788e
libstagefright: Set the maximums AAC framesize

The maximum AAC frame size is made equal to 8k*4
to handle multiple AAC frames in single buffer.

CRs-Fixed: 505248

Change-Id: I7c7e07620e2da8e1efe3914ebf73832f2f885ec9
audio: Add support for tunnel mode recording and compress voip

- Use modulo operator for common block buffer handling. Common block
  size is rounded to power of two. This limitation is avoided with
  modulo operator.
- Add support for tunnel mode recording
- Add support for compress voip

PS 2: Fixup ifdefs.

Change-Id: I95cdfff729affd784141487521c9f2f714221d11
audio: check audio mode to enable voice path for VoIP apps

- Add check for MODE_IN_COMMUNICATION to enable voice path
for VoIP applications

Change-Id: Ib603c6321c935d3b1313c2841b09eea932aa13f3
audio: Misc cleanups after merge

Change-Id: Idcd25798fe16fdfbb47d9c4e1822d93fd96e07c6
frameworks/av: Enable subsystem re-start for LPA/Tunnel

-Audio Daemon in Audio HAL intimates AudioFlinger
 of ADSP status (online/offline) using set_paramaters.
-AudioFlinger send set_parameters to its clients
 which is DirectTrack used for LPA/Tunnel playback.
-In case of ADSP crash during LPA/Tunnel playback,
 clean up of DirectTrack is initiated.

Change-Id: I87f720f305765e00e12032eed3e018aeff952390
(cherry picked from commit 02861e0f092c46640576bb8c700418ed82c266c3)
(cherry picked from commit 5abe97aa9e103420813b87e7abb2b676ffe8d097)
(cherry picked from commit 9a27f1e6c449585095e518f0d2f44e621ef18f52)
av: ...and more cleanups

Change-Id: Id2f6e484a21059c3ef707605d628b1ebeb4bff6a