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Fixes for key frame coding at speed 5.

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Keep the same transform cutoff and partition selection
for speed 5 as in speeds >=6 (non-rd speed settings).

Existing setting for key frame at speed 5 allowed transform size
up to 32x32 on key frames, and did not allow for 4x4 block partition size.
This created more visual artifacts on first few frames.

avgPSNR/overallPSNR/SSIM gains of 0.2/0.7/0.8 for rtc_derf(low-res) set,
and 0/0.7/1.1 gains for rtc set.

Change-Id: I8c139ec6c9bb74e14b4ffbad5f12e94f18a59c0b
This commit is contained in:
Marco 2015-06-22 15:20:28 -07:00
parent c8b9658ecc
commit fb2a89b1fb
1 changed files with 10 additions and 4 deletions
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14
vp9/encoder/vp9_encodeframe.c
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@ -2885,8 +2885,7 @@ static TX_MODE select_tx_mode(const VP9_COMP *cpi, MACROBLOCKD *const xd) {
if (xd->lossless)
return ONLY_4X4;
if (cpi->common.frame_type == KEY_FRAME &&
cpi->sf.use_nonrd_pick_mode &&
cpi->sf.partition_search_type == VAR_BASED_PARTITION)
cpi->sf.use_nonrd_pick_mode)
return ALLOW_16X16;
if (cpi->sf.tx_size_search_method == USE_LARGESTALL)
return ALLOW_32X32;
@ -3583,8 +3582,15 @@ static void encode_nonrd_sb_row(VP9_COMP *cpi,
INT64_MAX, td->pc_root);
} else {
choose_partitioning(cpi, tile_info, x, mi_row, mi_col);
nonrd_select_partition(cpi, td, tile_data, mi, tp, mi_row, mi_col,
BLOCK_64X64, 1, &dummy_rdc, td->pc_root);
// TODO(marpan): Seems like nonrd_select_partition does not support
// 4x4 partition. Since 4x4 is used on key frame, use this switch
// for now.
if (cm->frame_type == KEY_FRAME)
nonrd_use_partition(cpi, td, tile_data, mi, tp, mi_row, mi_col,
BLOCK_64X64, 1, &dummy_rdc, td->pc_root);
else
nonrd_select_partition(cpi, td, tile_data, mi, tp, mi_row, mi_col,
BLOCK_64X64, 1, &dummy_rdc, td->pc_root);
}
break;