This is to prepare for changing the code using the floating point table
to use the fixed point table instead.
This also allows reducing the size of the fractional part, which was
useful for finding every place where the the fixed point presentation
is relied upon.
Changes luma deblocking to use gather and scatter instead of reading
to and writing from here and there in memory. Should make them
faster and easier to vectorize, or at least cleaner.
Splits strong and weak luma deblocking to two functions, as they have
almost nothing in common.
Adds field lcu_stats to encoder_state_config_frame_t. The following data
is recorded for each LCU:
- number of bits
- squared cost
- used lambda value
- alpha parameter used for rate control
- beta parameter used for rate control
When rate control is enabled, enable cu_qp_delta_enabled_flag in PPS
with diff_cu_qp_delta_depth set to 0. Also adds code for writing the QP
deltas and a new cabac context.
Adds fields lambda, lambda_sqrt and qp to encoder_state_t. Drops field
cur_lambda_cost_sqrt from encoder_state_config_frame_t and renames
cur_lambda_cost to lambda.
- Defines MIN_LAMBDA and MAX_LAMBDA constants.
- Moves resetting state->frame->cur_gop_bits_coded to rate_control.c.
- Changes gop_allocate_bits to return the number of bits allocated like
pic_allocate_bits does.
When --threads=auto was given on the command line, cfg->threads was
actually set to zero, disabling threads altogether. Fixed to set
cfg->threads to -1, so that the number of threads is chosen
automatically.
The CABAC engine only writes to the bitstream when it has a full byte.
These writes are also always byte-aligned, so there is no need to even
check for stream alignment.
Speedup was around 3% with ultrafast and low QP.
Enforce bit depth promised by --input-bitdepth to avoid crashes when
larger values are provided.
Do endianess byte swap for all bytes when the buffer gets extended
to multiple of 8 pixels, and not just the number of input pixels.
Don't swap bytes on a little-endian system.
- Reduce indentation to 6 spaces
- Word wrap everything to under 80 characters
- Remove defaults from options covered by presets
- Add a dash in front of argument descriptions
- Add --(no-) to names of parameters that accept it and remove mention
of enabling or disabling
- Add executable and scripts as a dependancy to make docs
This value is not represented in the HEVC bitstream, which is why it
was not set previously. FFmpeg sets and needs it however, so make the
CLI set it as well to make sure we handle it correctly.
