picture.type -> encoder_state->global->pictype
picture.slicetype -> encoder_state->global->slicetype
picture.slice_sao_luma_flag -> 1 (was constant)
picture.slice_sao_chroma_flag -> 1 (was constant)
This may be changed later. For now it's better to avoid having slice related stuff in picture.
- It works just like the old structure except that the flags are checked with
bitmasks instead of having the flag value be propagated upwards. There isn't
really any benefit to this because the flags still have to be propagated to
parent CUs.
- Wrapped them inside a struct to make copying them easier. (Just need to copy
the struct instead of making individual copies)
"The memcpy() function shall copy n bytes from the object pointed to by s2 into the object pointed to by s1. If copying takes place between objects that overlap, the behavior is undefined."
- This changes the bitstream a little bit, because it changes the order in
which the modes are tried and when two modes have the same cost the first
one is chosen.
- Dst buffer was removes as it was no longer used.
- Adds calculation of chroma coefficient cost for 4x4 blocks.
- Previously there was no cost. Now the cost is added to the first prediction
block for NxN.
- This fix should improve bdrate by about 1%.
I didn't take into account that the reference pixel on the top-left of the
LCU gets over written if we just replace the top reference pixels for
current LCU with the bottom reference pixels after doing the search.
To handle this I copy the pixel that gets overwritten to the vertical
reference pixels.
- This is necessary because after we add in-loop filters to be done per LCU,
the reconstruction buffer will have the deblocked pixels. We only need the
edge-pixels for intra prediction though so we just save those.
- Right now it only copies the pixels and passes them on to search, where
the copied pixels are asserted to be the same ones we copy from
reconstruction buffer.
- New yuv_t struct added for arrays of dynamic length. We might want to change
other buffers to use it or something like it in the future.
- Moved NxN search to be done on the same level as other searches, as it's
really not any different from 2Nx2N.
- Produces working bitstream but reconstruction is different.
