mm-video-v4l2: Enhance decoder dump and fix O/P dump issue

* Add timestamp as id to dump file name
  to avoid overwrite of dump file for same instance
  pointer
* Add sequence count to dump file name to avoid overwrite
  for port reconfig without resolution change
* Dump C2D output as well using vendor.vidc.dec.log.cc.out
  property
* Use correct buffer header for venus ouput dump when
  color conversion is enabled
* Currently when decoder is in dynamic buffer mode,
  output buffers are not mapped and dump feature can't work.
  Add mmap/munmap in dump function to fix it.

Change-Id: Id851c591e6c77b97ae1b4d7bc3eff0c0f62ab905
2 files changed