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changed find_near_mvs search to include a mb from last frame

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This is an experiment to include a mv contribution from last frame to
nearest and near mv definition. Initial test showed some small though
consistent gain.

latest patch slightly better result ~.13%-~.18%.

TODO: the entropy used to encode the mode choice, i.e. the mv counts
based conditional distribution of modes should be re-collected to
reflect this change, it is expected that there is some further gain
from that.

Change-Id: Ief1e284a36d8aa56b49ae5b360c91419ec494fa4
This commit is contained in:
Yaowu Xu
2011-11-15 16:16:30 -08:00
parent ee2051f650
commit 643238a3e0
12 changed files with 343 additions and 25 deletions
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26
vp8/encoder/encodeframe.c
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@@ -767,6 +767,12 @@ void encode_mb_row(VP8_COMP *cpi,
// skip to next mb
xd->mode_info_context++;
#if CONFIG_NEWNEAR
xd->prev_mode_info_context++;
assert((xd->prev_mode_info_context - cpi->common.prev_mip)
==(xd->mode_info_context - cpi->common.mip));
#endif
x->partition_info++;
xd->above_context++;
@@ -786,6 +792,9 @@ void encode_mb_row(VP8_COMP *cpi,
xd->dst.v_buffer + 8);
// this is to account for the border
#if CONFIG_NEWNEAR
xd->prev_mode_info_context++;
#endif
xd->mode_info_context++;
x->partition_info++;
@@ -829,6 +838,10 @@ void init_encode_frame_mb_context(VP8_COMP *cpi)
xd->mode_info_context = cm->mi;
xd->mode_info_stride = cm->mode_info_stride;
#if CONFIG_NEWNEAR
xd->prev_mode_info_context = cm->prev_mi;
#endif
xd->frame_type = cm->frame_type;
@@ -970,6 +983,11 @@ void vp8_encode_frame(VP8_COMP *cpi)
xd->mode_info_context = cm->mi;
#if CONFIG_NEWNEAR
xd->prev_mode_info_context = cm->prev_mi;
#endif
vp8_zero(cpi->MVcount);
vp8_zero(cpi->coef_counts);
@@ -1022,7 +1040,13 @@ void vp8_encode_frame(VP8_COMP *cpi)
x->src.u_buffer += 8 * x->src.uv_stride * (cpi->encoding_thread_count + 1) - 8 * cm->mb_cols;
x->src.v_buffer += 8 * x->src.uv_stride * (cpi->encoding_thread_count + 1) - 8 * cm->mb_cols;
xd->mode_info_context += xd->mode_info_stride * cpi->encoding_thread_count;
xd->mode_info_context += xd->mode_info_stride
* cpi->encoding_thread_count;
#if CONFIG_NEWNEAR
xd->prev_mode_info_context += xd->mode_info_stride
* cpi->encoding_thread_count;
#endif
x->partition_info += xd->mode_info_stride * cpi->encoding_thread_count;
x->gf_active_ptr += cm->mb_cols * cpi->encoding_thread_count;