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Skip raster scan step in TZ search

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Raster scan is very slow and the BD-rate improvement is marginal.
This commit is contained in:
Arttu Ylä-Outinen 2018-02-21 11:12:40 +02:00
parent 6877064230
commit b64e46707d
1 changed files with 6 additions and 5 deletions
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11
src/search_inter.c
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@ -614,8 +614,9 @@ static void tz_search(inter_search_info_t *info, vector2d_t extra_mv)
const int iRaster = 5; // search distance limit and downsampling factor for step 3 const int iRaster = 5; // search distance limit and downsampling factor for step 3
const unsigned step2_type = 0; // search patterns for steps 2 and 4 const unsigned step2_type = 0; // search patterns for steps 2 and 4
const unsigned step4_type = 0; const unsigned step4_type = 0;
const bool bRasterRefinementEnable = false; // enable step 4 mode 1 const bool use_raster_scan = false; // enable step 3
const bool bStarRefinementEnable = true; // enable step 4 mode 2 (only one mode will be executed) const bool use_raster_refinement = false; // enable step 4 mode 1
const bool use_star_refinement = true; // enable step 4 mode 2 (only one mode will be executed)
int best_dist = 0; int best_dist = 0;
info->best_cost = UINT32_MAX; info->best_cost = UINT32_MAX;
@ -657,7 +658,7 @@ static void tz_search(inter_search_info_t *info, vector2d_t extra_mv)
} }
//step 3, raster scan //step 3, raster scan
if (best_dist > iRaster) { if (use_raster_scan && best_dist > iRaster) {
best_dist = iRaster; best_dist = iRaster;
kvz_tz_raster_search(info, iSearchRange, iRaster); kvz_tz_raster_search(info, iSearchRange, iRaster);
} }
@ -665,7 +666,7 @@ static void tz_search(inter_search_info_t *info, vector2d_t extra_mv)
//step 4 //step 4
//raster refinement //raster refinement
if (bRasterRefinementEnable && best_dist > 0) { if (use_raster_refinement && best_dist > 0) {
for (int iDist = best_dist >> 1; iDist > 0; iDist >>= 1) { for (int iDist = best_dist >> 1; iDist > 0; iDist >>= 1) {
start.x = info->best_mv.x >> 2; start.x = info->best_mv.x >> 2;
start.y = info->best_mv.y >> 2; start.y = info->best_mv.y >> 2;
@ -674,7 +675,7 @@ static void tz_search(inter_search_info_t *info, vector2d_t extra_mv)
} }
//star refinement (repeat step 2 for the current starting point) //star refinement (repeat step 2 for the current starting point)
while (bStarRefinementEnable && best_dist > 0) { while (use_star_refinement && best_dist > 0) {
best_dist = 0; best_dist = 0;
start.x = info->best_mv.x >> 2; start.x = info->best_mv.x >> 2;
start.y = info->best_mv.y >> 2; start.y = info->best_mv.y >> 2;