avsync-lib: avoid rendering video for invalid wall clock [1/1]

PD#TV-109261

Problem:
when 1st video frame arrives early, wall clock won't start.
frame_expire() will wrongly render several video frames.

Solution:
Prevent rendering if wall clock is invalid.

Verify:
In JIRA

Signed-off-by: Song Zhao <song.zhao@amlogic.com>
Change-Id: I50a10b0cffa7cec991797e756c15179f15e9f635
1 file changed
tree: 6f9f6e8324ff6822414eee2666d00fe7b0963816
  1. src/
  2. avsync-lib.mk
  3. Config.in
  4. Makefile
  5. VERSION
  6. version_config.sh