mpeg2: CB2 v4l stream mode error stream stuck. [1/1]

PD#SWPL-197724

Problem:
1.When the error stream frame is output,
get_ref and field_num do not match, causing buf to not recycle.
2.interlace stream second field pts error.
3.The error frame called peek to get pts, but pts not *1000.

Solution:
1.When frame output, get_ref is obtained based on field_num.
2.Fixed interlace stream second field pts.
3.Fixed error frame peek's pts.

Verify:
S905X4

Change-Id: I680b6e11543a96b5db0a60fe25f9c54bb7f1d699
Signed-off-by: yuna.liu <yuna.liu@amlogic.com>
2 files changed