tree d56512c9125bda0301284ea23cb179e6442c7fa1
parent ece2c48d0e02afa77f9d9b1144f20ca6e0b529d2
author chiyotsai <chiyotsai@google.com> 1673551996 -0800
committer Chi Yo Tsai <chiyotsai@google.com> 1673988911 +0000

MOTION_SEARCH: Small optimizations to diamond_search_sad

This commit consists of the following changes:
 * Divide diamond_search_sad into compound case and single case.
 * Move a couple variables out of the inner loop to avoid reloading.
 * Save num00 and second_best_mv at the end of diamond_search_sad to
   avoid duplicate checks for NULL.
 * Remove redundant checks for next_step_size.

Performance:
| SPD_SET | TESTSET | AVG_PSNR | OVR_PSNR |  SSIM   | ENC_T |
|---------|---------|----------|----------|---------|-------|
|    1    | hdres2  | +0.000%  | +0.000%  | +0.000% | -0.4% |
|    1    | lowres2 | +0.000%  | +0.000%  | +0.000% | -0.3% |
|    1    | midres2 | +0.000%  | +0.000%  | +0.000% | -0.3% |
|---------|---------|----------|----------|---------|-------|
|    2    | hdres2  | +0.000%  | +0.000%  | +0.000% | -0.3% |
|    2    | lowres2 | +0.000%  | +0.000%  | +0.000% | -0.3% |
|    2    | midres2 | +0.000%  | +0.000%  | +0.000% | -0.3% |
|---------|---------|----------|----------|---------|-------|
|    3    | hdres2  | +0.000%  | +0.000%  | +0.000% | -0.4% |
|    3    | lowres2 | +0.000%  | +0.000%  | +0.000% | -0.3% |
|    3    | midres2 | +0.000%  | +0.000%  | +0.000% | -0.3% |
|---------|---------|----------|----------|---------|-------|
|    4    | hdres2  | +0.000%  | +0.000%  | +0.000% | -0.4% |
|    4    | lowres2 | +0.000%  | +0.000%  | +0.000% | -0.3% |
|    4    | midres2 | +0.000%  | +0.000%  | +0.000% | -0.3% |
|---------|---------|----------|----------|---------|-------|
|    5    | hdres2  | +0.000%  | +0.000%  | +0.000% | -0.5% |
|    5    | lowres2 | +0.000%  | +0.000%  | +0.000% | -0.2% |
|    5    | midres2 | +0.000%  | +0.000%  | +0.000% | -0.3% |
|---------|---------|----------|----------|---------|-------|
|    6    | hdres2  | +0.000%  | +0.000%  | +0.000% | -0.5% |
|    6    | lowres2 | +0.000%  | +0.000%  | +0.000% | -0.3% |
|    6    | midres2 | +0.000%  | +0.000%  | +0.000% | -0.4% |

Change-Id: Id978d6fd17671dbdcc02a24a94b1218a89eef730