Added support for external frame buffers to libvpx's VP9 decoder.
If the external frame buffer functions are set then libvpx will
call the get function whenever it needs a new frame buffer to
decode a frame into. And it will call the release function
whenever there are no more references to that buffer.

Change-Id: Id2934d005f606af6e052fb6db0d5b7c02f567522

Change-Id: I6ef0ce5371ed9e2a415dd8c08c93ad603f0ad7b2

Cosmetic change to use pre-defined macros.

Change-Id: I93e9fa90113d0242599048940b39694660385a6f

Change-Id: I4d2729dc5c46db2847700256941a66b0957c105d

BasicRateTargeting3TemporalLayers found an error with
the get/release frame buffer management.

Change-Id: Iccff25cba1d2f276f2a0d0fb7b20cf99b4405549

Change-Id: I35ec77b71e6fd686865cead9281e4dd9e9bc9e86

Change-Id: Ief941ff75c5e25f3288326a162b1bd0c0f17a779

Removes certain cases of feedback of active_worst_quality,
and removes it from the RATE_CONTROL structure. Now active
worst quality is expected to be computed locally in the
q picking function during the encode.
Making temporal filter strength depend on avg_frame_qindex
rather than on active_worst_quality actually improves
performance esp. for yt.
derf: +0.038%
yt: +0.359%

Change-Id: I1fe5a343034b55af9322289165321f00ac0827b1

In real time encoding, we enable encode_breakout to make encoding
fast. A speed feature "use_encode_breakout" is defined to set
encode_breakout thresholds for different speeds.

However, currently, static_thresh is an encoder option. The encode_
breakout can be turned off if user sets static_thresh=0 specifically.

The rtc set borg test result: (need to set --static_thresh=1)
speed -5, psnr loss -3.543%;
speed -4, psnr loss -2.358%;
speed -3, psnr loss -0.771%.

Encoding speed test:
speed -5, 11% - 60% speedup;
speed -4, 5.5% - 28% speedup;
speed -3, 0.8% - 7% speedup.

Change-Id: Icde592ffbe77eac7446f872a2e9eb2051733677b

Frank is going to fix it soon, disabling for now.

Change-Id: Ifb7092d7db5af01bde62897af189fd620b7bbdf3

Change-Id: I7dd8532052f0b2d4077f579e78db3987b58e3d2a

Silences MSVC warning.

Change-Id: I43191cdd8f0231b259ec091be24325ec99d2e962

Change-Id: I2c47f0ab13de82de8833c3f134e5f3c74394374f

This commit moves unnecessary mode_info update steps out of inter
mode test loop.

Change-Id: I3705450c44cda060021f4fd76c34f1b20d11658b

Use frame_parameter_update to precisely describe the functionality.

Change-Id: Ia9a55ba8efef7b987e30d949dd00ac716189bdb9