While encoding a frame, its last frame source can be used to give
acurate motion information. This patch prevents last frame to be
overwritten so that it is available during current frame encoding.
The last source is scaled when it is necessary. cpi->Last_Source
points to the last source frame.
Change-Id: I0e1ef5e9e1d2badf9d0c7a1a44a7ed5b24c09425
This commit optimizes the bit allocation for the non-RD coding flow.
It applies slightly better quantizer to the frames, where all blocks
run a non-RD partition search. Such frames typically have better
rate-distortion trade off, thus improving the reconstruction quality
for next few frames reference at reasonably low increment in rate
cost.
The coding performance for rtc set at speed -5 with error-resilient
tuned on and rate control set as cbr is improved by 19.58%. It improved
the coding speed by about 10% for a portion of local test clips.
Change-Id: I9d56696cd4359dc8136ca10aff10fff05aaa2686
This commit adjusted the speed steps in rt mode to make the steps
more evenly spaced on speed and quality, specifically:
1. Merged 3 and 4 into one single step 3 and removed confilicting
features.
2. Move 8, 7, 6, 5 to be 7, 6, 5, 4 repsectively.
Change-Id: I38d56d61531f3561d772aef953c411c8fb38c063
Root cause is the different default register length between x86
and x64 platform. Change spatial_layer_id to long long.
Change-Id: If1a5972365c7a59f7e76cb4fd714610f3d48a8ff
Small speed gain for speed 1.
Quality is generally a little up for speed 2.
Speed 3 was similar to speed 4 but now positioned more
evenly between 2 and 4 speed and quality wise.
(opsnr +5.6% ssim +8.25% across all sets)
Speed 4 is a little slower than before but sizable quality gains.
(opsnr +3.7% ssim +6.8% across all sets)
The code has been cleaned up a bit so that for each incremental
speed step changes over the previous speed step are applied.
This makes it easier to see what is changing from one setting to
the next.
Change-Id: I2d98d0d6230af23486adaec01908f58942a7cdeb
Allow tx search for ARF and GF helps quality but a little slower.
Setting subpel_iters_per_step to 1 improves encode speed.
Setting sf->mode_skip_start = 10 improves speed.
Initial local results suggest overall impact on quality is neutral
but encode is up to 15% faster.
Change-Id: Ibde02cae6626a44c10a1da0cefe888afbb51f037
Removes a TODO. Changed meaning of some parameters
(target-max-percent refresh and starting index) to be
defined relative to superblock. Also, modify turn-off condition.
Change-Id: I5e55f372b7079c24f9cdac0b06fa34620dbf456b
This commit enables the non-RD mode decision coding flow to
adaptively apply partition search in non-refresh frame, when the
collocated block in previous frame suggests there might be a motion
activity. It refactors the update_state_rt() function to support
buffer swap of mode_info struct, thereby unifying the encoding
stage across various non-RD coding modes.
It provides 5% compression performance gains in speed -6 for rtc
test set, at about 12% speed slow down.
Change-Id: Iefa374aed5a11c4b7ff9a3ed36a98ea8bd184edb
Fix so that vp9_update_segment_aq() will use the correct (i..e, chosen)
encoding mode (from ctx struct) in update_state.
Change-Id: Icc4b66f3935fad5ec4516a4d57e843d12c365e64
This commit allows the recursive non-RD partition search to early
terminate sub search tree when the cumulative rate-distortion is
already above the best available.
Change-Id: Ifdbcbb4bee229f47fde3033200829577c9f1fc1d
This commit added a speed feature to make the logic of calculating
skip_recode on a block level more explicit. This also enable the
feature to be enabled at speed 5 where the previous logic is too
conservative, help gain back the lost speed for --rt(-5).
Change-Id: Ieb37ca3e85c2e7bda343486edf13d5f5395f2233
There were a few conflicts between the new non-RD partition search
and recent clean-up patches, which were not caught by git control.
This commit fixed these issues.
Change-Id: Ieebefbd6c19d81d0d13e3c568877d5cce2ab7797
