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more accurate get_mvd_coding_cost

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This commit is contained in:
Joose Sainio 2022-01-06 09:12:03 +02:00
parent 8d12884e43
commit 159793f5b4
1 changed files with 10 additions and 8 deletions
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18
src/search_inter.c
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@ -247,10 +247,10 @@ static bool check_mv_cost(inter_search_info_t *info,
static unsigned get_ep_ex_golomb_bitcost(unsigned symbol)
{
// Calculate 2 * log2(symbol + 2)
// Calculate 2 * log2(symbol )
unsigned bins = 0;
symbol += 2;
symbol += 0;
if (symbol >= 1 << 8) { bins += 16; symbol >>= 8; }
if (symbol >= 1 << 4) { bins += 8; symbol >>= 4; }
if (symbol >= 1 << 2) { bins += 4; symbol >>= 2; }
@ -324,19 +324,21 @@ static void select_starting_point(inter_search_info_t *info,
}
static double get_mvd_coding_cost(const encoder_state_t *state,
const cabac_data_t* cabac,
const int32_t mvd_hor,
const int32_t mvd_ver)
static double get_mvd_coding_cost(const encoder_state_t* state,
const cabac_data_t* cabac,
const int32_t mvd_hor,
const int32_t mvd_ver)
{
double bitcost = 0;
double bitcost = 4 << CTX_FRAC_BITS;
const vector2d_t abs_mvd = { abs(mvd_hor), abs(mvd_ver) };
bitcost += abs_mvd.x == 1 ? 1 << CTX_FRAC_BITS : (0 * (1 << CTX_FRAC_BITS));
bitcost += abs_mvd.y == 1 ? 1 << CTX_FRAC_BITS : (0 * (1 << CTX_FRAC_BITS));
bitcost += get_ep_ex_golomb_bitcost(abs_mvd.x) << CTX_FRAC_BITS;
bitcost += get_ep_ex_golomb_bitcost(abs_mvd.y) << CTX_FRAC_BITS;
// Round and shift back to integer bits.
return bitcost / (1 << CTX_FRAC_BITS);
return bitcost / (1 << CTX_FRAC_BITS);
}