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038a3bd665
if outside doesn't set init qp value, mpp will estimate one init qp according to resolution and bitrate. Change-Id: If5415f6a3bfa3f2981ffd4eb044614bf9b035d2f Signed-off-by: Jung Zhao <jung.zhao@rock-chips.com>
109 lines
2.7 KiB
C++
109 lines
2.7 KiB
C++
/*
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* Copyright 2015 Rockchip Electronics Co. LTD
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "mpp_common.h"
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static const RK_U8 log2_tab[256] = {
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0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
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5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
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6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
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7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
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};
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RK_S32 mpp_log2(RK_U32 v)
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{
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RK_S32 n = 0;
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if (v & 0xffff0000) {
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v >>= 16;
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n += 16;
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}
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if (v & 0xff00) {
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v >>= 8;
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n += 8;
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}
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n += log2_tab[v];
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return n;
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}
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RK_S32 mpp_log2_16bit(RK_U32 v)
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{
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RK_S32 n = 0;
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if (v & 0xff00) {
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v >>= 8;
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n += 8;
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}
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n += log2_tab[v];
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return n;
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}
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RK_S32 axb_div_c(RK_S32 a, RK_S32 b, RK_S32 c)
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{
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RK_U32 left = 32;
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RK_U32 right = 0;
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RK_U32 shift;
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RK_S32 sign = 1;
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RK_S32 tmp;
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if (a == 0 || b == 0)
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return 0;
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else if ((a * b / b) == a && c != 0)
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return (a * b / c);
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if (a < 0) {
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sign = -1;
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a = -a;
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}
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if (b < 0) {
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sign *= -1;
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b = -b;
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}
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if (c < 0) {
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sign *= -1;
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c = -c;
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}
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if (c == 0)
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return 0x7FFFFFFF * sign;
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if (b > a) {
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tmp = b;
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b = a;
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a = tmp;
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}
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for (--left; (((RK_U32)a << left) >> left) != (RK_U32)a; --left)
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;
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left--;
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while (((RK_U32)b >> right) > (RK_U32)c)
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right++;
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if (right > left) {
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return 0x7FFFFFFF * sign;
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} else {
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shift = left - right;
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return (RK_S32)((((RK_U32)a << shift) /
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(RK_U32)c * (RK_U32)b) >> shift) * sign;
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}
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}
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