exynos_omx: multi_thread: Change scheme of codec buffer alloc in video encode.

The case of input port copy mode in video encode, Need codec buffer.
This patch supports dynamic calculation of the buffer size of the codec.

Bug: 10838086
Change-Id: I7b7ad97a57455a861ad8e93964891565d95a3899
Signed-off-by: SeungBeom Kim <sbcrux.kim@samsung.com>
4 files changed