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Update use_prev_frame_mvs flag in decoder.

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Added check to see if last frame was all intra.  This will
eliminate two checks in find_mv_refs_idx().  Also, do not
update the frame mvs if the current frame is all intra.

This improved performance on material with frequent
intra-only frames.

Change-Id: I44a4042c3670ab0d38439d565062a0e2a1ba9d1e
This commit is contained in:
Scott LaVarnway
2015-06-08 03:38:13 -07:00
parent 78b434e8b1
commit c9976b32b4
3 changed files with 17 additions and 13 deletions
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6
vp9/decoder/vp9_decodeframe.c
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@@ -1313,6 +1313,7 @@ static size_t read_uncompressed_header(VP9Decoder *pbi,
size_t sz;
cm->last_frame_type = cm->frame_type;
cm->last_intra_only = cm->intra_only;
if (vp9_rb_read_literal(rb, 2) != VP9_FRAME_MARKER)
vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,
@@ -1639,8 +1640,9 @@ void vp9_decode_frame(VP9Decoder *pbi,
cm->use_prev_frame_mvs = !cm->error_resilient_mode &&
cm->width == cm->last_width &&
cm->height == cm->last_height &&
!cm->intra_only &&
cm->last_show_frame;
!cm->last_intra_only &&
cm->last_show_frame &&
(cm->last_frame_type != KEY_FRAME);
vp9_setup_block_planes(xd, cm->subsampling_x, cm->subsampling_y);