ref: 4b0bfe8f7d5cc99e6b803a57c1092e593ee28986
dir: /vp9/encoder/vp9_non_greedy_mv.c/
/*
* Copyright (c) 2019 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "vp9/common/vp9_mv.h"
#include "vp9/encoder/vp9_non_greedy_mv.h"
// TODO(angiebird): move non_greedy_mv related functions to this file
#define LOG2_TABLE_SIZE 1024
static const int log2_table[LOG2_TABLE_SIZE] = {
0, // This is a dummy value
0, 1048576, 1661954, 2097152, 2434718, 2710530, 2943725,
3145728, 3323907, 3483294, 3627477, 3759106, 3880192, 3992301,
4096672, 4194304, 4286015, 4372483, 4454275, 4531870, 4605679,
4676053, 4743299, 4807682, 4869436, 4928768, 4985861, 5040877,
5093962, 5145248, 5194851, 5242880, 5289431, 5334591, 5378443,
5421059, 5462508, 5502851, 5542146, 5580446, 5617800, 5654255,
5689851, 5724629, 5758625, 5791875, 5824409, 5856258, 5887450,
5918012, 5947969, 5977344, 6006160, 6034437, 6062195, 6089453,
6116228, 6142538, 6168398, 6193824, 6218829, 6243427, 6267632,
6291456, 6314910, 6338007, 6360756, 6383167, 6405252, 6427019,
6448477, 6469635, 6490501, 6511084, 6531390, 6551427, 6571202,
6590722, 6609993, 6629022, 6647815, 6666376, 6684713, 6702831,
6720734, 6738427, 6755916, 6773205, 6790299, 6807201, 6823917,
6840451, 6856805, 6872985, 6888993, 6904834, 6920510, 6936026,
6951384, 6966588, 6981641, 6996545, 7011304, 7025920, 7040397,
7054736, 7068940, 7083013, 7096956, 7110771, 7124461, 7138029,
7151476, 7164804, 7178017, 7191114, 7204100, 7216974, 7229740,
7242400, 7254954, 7267405, 7279754, 7292003, 7304154, 7316208,
7328167, 7340032, 7351805, 7363486, 7375079, 7386583, 7398000,
7409332, 7420579, 7431743, 7442826, 7453828, 7464751, 7475595,
7486362, 7497053, 7507669, 7518211, 7528680, 7539077, 7549404,
7559660, 7569847, 7579966, 7590017, 7600003, 7609923, 7619778,
7629569, 7639298, 7648964, 7658569, 7668114, 7677598, 7687023,
7696391, 7705700, 7714952, 7724149, 7733289, 7742375, 7751407,
7760385, 7769310, 7778182, 7787003, 7795773, 7804492, 7813161,
7821781, 7830352, 7838875, 7847350, 7855777, 7864158, 7872493,
7880782, 7889027, 7897226, 7905381, 7913492, 7921561, 7929586,
7937569, 7945510, 7953410, 7961268, 7969086, 7976864, 7984602,
7992301, 7999960, 8007581, 8015164, 8022709, 8030217, 8037687,
8045121, 8052519, 8059880, 8067206, 8074496, 8081752, 8088973,
8096159, 8103312, 8110431, 8117516, 8124569, 8131589, 8138576,
8145532, 8152455, 8159347, 8166208, 8173037, 8179836, 8186605,
8193343, 8200052, 8206731, 8213380, 8220001, 8226593, 8233156,
8239690, 8246197, 8252676, 8259127, 8265550, 8271947, 8278316,
8284659, 8290976, 8297266, 8303530, 8309768, 8315981, 8322168,
8328330, 8334467, 8340579, 8346667, 8352730, 8358769, 8364784,
8370775, 8376743, 8382687, 8388608, 8394506, 8400381, 8406233,
8412062, 8417870, 8423655, 8429418, 8435159, 8440878, 8446576,
8452252, 8457908, 8463542, 8469155, 8474748, 8480319, 8485871,
8491402, 8496913, 8502404, 8507875, 8513327, 8518759, 8524171,
8529564, 8534938, 8540293, 8545629, 8550947, 8556245, 8561525,
8566787, 8572031, 8577256, 8582464, 8587653, 8592825, 8597980,
8603116, 8608236, 8613338, 8618423, 8623491, 8628542, 8633576,
8638593, 8643594, 8648579, 8653547, 8658499, 8663434, 8668354,
8673258, 8678145, 8683017, 8687874, 8692715, 8697540, 8702350,
8707145, 8711925, 8716690, 8721439, 8726174, 8730894, 8735599,
8740290, 8744967, 8749628, 8754276, 8758909, 8763528, 8768134,
8772725, 8777302, 8781865, 8786415, 8790951, 8795474, 8799983,
8804478, 8808961, 8813430, 8817886, 8822328, 8826758, 8831175,
8835579, 8839970, 8844349, 8848715, 8853068, 8857409, 8861737,
8866053, 8870357, 8874649, 8878928, 8883195, 8887451, 8891694,
8895926, 8900145, 8904353, 8908550, 8912734, 8916908, 8921069,
8925220, 8929358, 8933486, 8937603, 8941708, 8945802, 8949885,
8953957, 8958018, 8962068, 8966108, 8970137, 8974155, 8978162,
8982159, 8986145, 8990121, 8994086, 8998041, 9001986, 9005920,
9009844, 9013758, 9017662, 9021556, 9025440, 9029314, 9033178,
9037032, 9040877, 9044711, 9048536, 9052352, 9056157, 9059953,
9063740, 9067517, 9071285, 9075044, 9078793, 9082533, 9086263,
9089985, 9093697, 9097400, 9101095, 9104780, 9108456, 9112123,
9115782, 9119431, 9123072, 9126704, 9130328, 9133943, 9137549,
9141146, 9144735, 9148316, 9151888, 9155452, 9159007, 9162554,
9166092, 9169623, 9173145, 9176659, 9180165, 9183663, 9187152,
9190634, 9194108, 9197573, 9201031, 9204481, 9207923, 9211357,
9214784, 9218202, 9221613, 9225017, 9228412, 9231800, 9235181,
9238554, 9241919, 9245277, 9248628, 9251971, 9255307, 9258635,
9261956, 9265270, 9268577, 9271876, 9275169, 9278454, 9281732,
9285002, 9288266, 9291523, 9294773, 9298016, 9301252, 9304481,
9307703, 9310918, 9314126, 9317328, 9320523, 9323711, 9326892,
9330067, 9333235, 9336397, 9339552, 9342700, 9345842, 9348977,
9352106, 9355228, 9358344, 9361454, 9364557, 9367654, 9370744,
9373828, 9376906, 9379978, 9383043, 9386102, 9389155, 9392202,
9395243, 9398278, 9401306, 9404329, 9407345, 9410356, 9413360,
9416359, 9419351, 9422338, 9425319, 9428294, 9431263, 9434226,
9437184, 9440136, 9443082, 9446022, 9448957, 9451886, 9454809,
9457726, 9460638, 9463545, 9466446, 9469341, 9472231, 9475115,
9477994, 9480867, 9483735, 9486597, 9489454, 9492306, 9495152,
9497993, 9500828, 9503659, 9506484, 9509303, 9512118, 9514927,
9517731, 9520530, 9523324, 9526112, 9528895, 9531674, 9534447,
9537215, 9539978, 9542736, 9545489, 9548237, 9550980, 9553718,
9556451, 9559179, 9561903, 9564621, 9567335, 9570043, 9572747,
9575446, 9578140, 9580830, 9583514, 9586194, 9588869, 9591540,
9594205, 9596866, 9599523, 9602174, 9604821, 9607464, 9610101,
9612735, 9615363, 9617987, 9620607, 9623222, 9625832, 9628438,
9631040, 9633637, 9636229, 9638818, 9641401, 9643981, 9646556,
9649126, 9651692, 9654254, 9656812, 9659365, 9661914, 9664459,
9666999, 9669535, 9672067, 9674594, 9677118, 9679637, 9682152,
9684663, 9687169, 9689672, 9692170, 9694665, 9697155, 9699641,
9702123, 9704601, 9707075, 9709545, 9712010, 9714472, 9716930,
9719384, 9721834, 9724279, 9726721, 9729159, 9731593, 9734024,
9736450, 9738872, 9741291, 9743705, 9746116, 9748523, 9750926,
9753326, 9755721, 9758113, 9760501, 9762885, 9765266, 9767642,
9770015, 9772385, 9774750, 9777112, 9779470, 9781825, 9784175,
9786523, 9788866, 9791206, 9793543, 9795875, 9798204, 9800530,
9802852, 9805170, 9807485, 9809797, 9812104, 9814409, 9816710,
9819007, 9821301, 9823591, 9825878, 9828161, 9830441, 9832718,
9834991, 9837261, 9839527, 9841790, 9844050, 9846306, 9848559,
9850808, 9853054, 9855297, 9857537, 9859773, 9862006, 9864235,
9866462, 9868685, 9870904, 9873121, 9875334, 9877544, 9879751,
9881955, 9884155, 9886352, 9888546, 9890737, 9892925, 9895109,
9897291, 9899469, 9901644, 9903816, 9905985, 9908150, 9910313,
9912473, 9914629, 9916783, 9918933, 9921080, 9923225, 9925366,
9927504, 9929639, 9931771, 9933900, 9936027, 9938150, 9940270,
9942387, 9944502, 9946613, 9948721, 9950827, 9952929, 9955029,
9957126, 9959219, 9961310, 9963398, 9965484, 9967566, 9969645,
9971722, 9973796, 9975866, 9977934, 9980000, 9982062, 9984122,
9986179, 9988233, 9990284, 9992332, 9994378, 9996421, 9998461,
10000498, 10002533, 10004565, 10006594, 10008621, 10010644, 10012665,
10014684, 10016700, 10018713, 10020723, 10022731, 10024736, 10026738,
10028738, 10030735, 10032729, 10034721, 10036710, 10038697, 10040681,
10042662, 10044641, 10046617, 10048591, 10050562, 10052530, 10054496,
10056459, 10058420, 10060379, 10062334, 10064287, 10066238, 10068186,
10070132, 10072075, 10074016, 10075954, 10077890, 10079823, 10081754,
10083682, 10085608, 10087532, 10089453, 10091371, 10093287, 10095201,
10097112, 10099021, 10100928, 10102832, 10104733, 10106633, 10108529,
10110424, 10112316, 10114206, 10116093, 10117978, 10119861, 10121742,
10123620, 10125495, 10127369, 10129240, 10131109, 10132975, 10134839,
10136701, 10138561, 10140418, 10142273, 10144126, 10145976, 10147825,
10149671, 10151514, 10153356, 10155195, 10157032, 10158867, 10160699,
10162530, 10164358, 10166184, 10168007, 10169829, 10171648, 10173465,
10175280, 10177093, 10178904, 10180712, 10182519, 10184323, 10186125,
10187925, 10189722, 10191518, 10193311, 10195103, 10196892, 10198679,
10200464, 10202247, 10204028, 10205806, 10207583, 10209357, 10211130,
10212900, 10214668, 10216435, 10218199, 10219961, 10221721, 10223479,
10225235, 10226989, 10228741, 10230491, 10232239, 10233985, 10235728,
10237470, 10239210, 10240948, 10242684, 10244417, 10246149, 10247879,
10249607, 10251333, 10253057, 10254779, 10256499, 10258217, 10259933,
10261647, 10263360, 10265070, 10266778, 10268485, 10270189, 10271892,
10273593, 10275292, 10276988, 10278683, 10280376, 10282068, 10283757,
10285444, 10287130, 10288814, 10290495, 10292175, 10293853, 10295530,
10297204, 10298876, 10300547, 10302216, 10303883, 10305548, 10307211,
10308873, 10310532, 10312190, 10313846, 10315501, 10317153, 10318804,
10320452, 10322099, 10323745, 10325388, 10327030, 10328670, 10330308,
10331944, 10333578, 10335211, 10336842, 10338472, 10340099, 10341725,
10343349, 10344971, 10346592, 10348210, 10349828, 10351443, 10353057,
10354668, 10356279, 10357887, 10359494, 10361099, 10362702, 10364304,
10365904, 10367502, 10369099, 10370694, 10372287, 10373879, 10375468,
10377057, 10378643, 10380228, 10381811, 10383393, 10384973, 10386551,
10388128, 10389703, 10391276, 10392848, 10394418, 10395986, 10397553,
10399118, 10400682, 10402244, 10403804, 10405363, 10406920, 10408476,
10410030, 10411582, 10413133, 10414682, 10416230, 10417776, 10419320,
10420863, 10422404, 10423944, 10425482, 10427019, 10428554, 10430087,
10431619, 10433149, 10434678, 10436206, 10437731, 10439256, 10440778,
10442299, 10443819, 10445337, 10446854, 10448369, 10449882, 10451394,
10452905, 10454414, 10455921, 10457427, 10458932, 10460435, 10461936,
10463436, 10464935, 10466432, 10467927, 10469422, 10470914, 10472405,
10473895, 10475383, 10476870, 10478355, 10479839, 10481322, 10482802,
10484282,
};
static int64_t log2_approximation(int64_t v) {
assert(v > 0);
if (v < LOG2_TABLE_SIZE) {
return log2_table[v];
} else {
// use linear approximation when v >= 2^10
const int slope =
1477; // slope = 1 / (log(2) * 1024) * (1 << LOG2_PRECISION)
assert(LOG2_TABLE_SIZE == 1 << 10);
return slope * (v - LOG2_TABLE_SIZE) + (10 << LOG2_PRECISION);
}
}
int64_t vp9_nb_mvs_inconsistency(const MV *mv, const int_mv *nb_full_mvs,
int mv_num) {
// The bahavior of this function is to compute log2 of mv difference,
// i.e. min log2(1 + row_diff * row_diff + col_diff * col_diff)
// against available neghbor mvs.
// Since the log2 is monotonic increasing, we can compute
// min row_diff * row_diff + col_diff * col_diff first
// then apply log2 in the end
int i;
int64_t min_abs_diff = INT64_MAX;
int cnt = 0;
assert(mv_num <= NB_MVS_NUM);
for (i = 0; i < mv_num; ++i) {
MV nb_mv = nb_full_mvs[i].as_mv;
const int64_t row_diff = abs(mv->row - nb_mv.row);
const int64_t col_diff = abs(mv->col - nb_mv.col);
const int64_t abs_diff = row_diff * row_diff + col_diff * col_diff;
assert(nb_full_mvs[i].as_int != INVALID_MV);
min_abs_diff = VPXMIN(abs_diff, min_abs_diff);
++cnt;
}
if (cnt) {
return log2_approximation(1 + min_abs_diff);
} else {
return 0;
}
}