[FFmpeg-devel] [PATCH v5 0/3] optimize frame dumping and fix missing start codes

[hwrenx]

Version 5:
1. Using ifs for log level instead of expressions.

--------
Version 4:
1. Change info level setting.
2. Remove `Decoder not found` condition.

--------
The previous version 2 patches were deprecated for using
pointer to itself can be unsafe when release frames.

This patch set is mainly about avoiding using memcpy when fetching
frame data, and fixed missing start codes which may cause error
packetization sometime. Default info level of libdavs2 was changed
because we found debug info is useless in most of the time.
hwrenx (3):
  lavc/avs2_parser.c: fix missing start code
  lavc/libdavs2.c: fix decoder info level setting
  lavc/libdavs2.c: reduce memcpy

 libavcodec/avs2_parser.c |  4 ++-
 libavcodec/libdavs2.c    | 69 +++++++++++++++++++++++++++++++-----------------
 2 files changed, 48 insertions(+), 25 deletions(-)

The performance comparison is like following:

[Platform]
  Intel® Core™ i7-8700k CPU @ 3.70GHz × 6 / 16GiB
[Command]
  ffmpeg -i test.avs2 -vsync 0 -f null -
[Stream]
  7680x4320 yuv420p Random Access
[Original version]
  frame= 2669 fps= 23 q=-0.0 Lsize=N/A time=00:00:53.44 bitrate=N/A speed=0.465x
[Optimized version]
  frame= 2669 fps= 42 q=-0.0 Lsize=N/A time=00:00:53.44 bitrate=N/A speed=0.836x

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2.7.4