Set sb_size=64 for screen real-time multi-thread
For screen real-time mode: set sb_size=64 for
dynamic (default) mode for mult-thread encode
with low number of 128x128 superblocks per tile.
For resolutions > 720p and #threads >= 4.
This has ~8-13% speedup (fps) on rtc_screen for
4 and 8 threads.
Change-Id: I1427dedca4263882c56ef914530d03b726be6e7c
diff --git a/av1/encoder/encoder_utils.c b/av1/encoder/encoder_utils.c
index c6bff2e..e2240cd 100644
--- a/av1/encoder/encoder_utils.c
+++ b/av1/encoder/encoder_utils.c
@@ -803,10 +803,21 @@
? BLOCK_128X128
: BLOCK_64X64;
} else if (oxcf->mode == REALTIME) {
- if (oxcf->tune_cfg.content == AOM_CONTENT_SCREEN)
- return AOMMIN(width, height) >= 720 ? BLOCK_128X128 : BLOCK_64X64;
- else
+ if (oxcf->tune_cfg.content == AOM_CONTENT_SCREEN) {
+ const TileConfig *const tile_cfg = &oxcf->tile_cfg;
+ const int num_tiles =
+ (1 << tile_cfg->tile_columns) * (1 << tile_cfg->tile_rows);
+ // For multi-thread encode: if the number of (128x128) superbllocks
+ // per tile is low use 64X64 superblock.
+ if (oxcf->row_mt == 1 && oxcf->max_threads >= 4 &&
+ oxcf->max_threads >= num_tiles && AOMMIN(width, height) > 720 &&
+ (width * height) / (128 * 128 * num_tiles) <= 32)
+ return BLOCK_64X64;
+ else
+ return AOMMIN(width, height) >= 720 ? BLOCK_128X128 : BLOCK_64X64;
+ } else {
return AOMMIN(width, height) > 720 ? BLOCK_128X128 : BLOCK_64X64;
+ }
}
// TODO(any): Possibly could improve this with a heuristic.
