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b9c1ab8907
Commit 1af615683e put initializing
the ff_fft_offsets_lut (which is typically used if FFT_FIXED_32)
behind an ff_thread_once() to make ff_fft_init() thread-safe; yet
there is a second place where said table may be initialized which
is not guarded by this AVOnce: ff_fft_init_mips(). MIPS uses this LUT
even for ordinary floating point FFTs, so that ff_fft_init() is not
thread-safe (on MIPS) for both 32bit fixed-point as well as
floating-point FFTs; e.g. ff_mdct_init() inherits this flaw and
therefore initializing e.g. the AAC decoders is not thread-safe (on
MIPS) despite them having FF_CODEC_CAP_INIT_CLEANUP set.
This commit fixes this by moving the AVOnce to fft_init_table.c and
using it to guard all initializations of ff_fft_offsets_lut.
(It is not that bad in practice, because every entry of
ff_fft_offsets_lut is never read during initialization and is only once
ever written to (namely to its final value); but even these are
conflicting actions which are (by definition) data races and lead to
undefined behaviour.)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
345 lines
27 KiB
C
345 lines
27 KiB
C
/*
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* Copyright (c) 2012
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* MIPS Technologies, Inc., California.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Authors: Stanislav Ocovaj (socovaj@mips.com)
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* Goran Cordasic (goran@mips.com)
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* Djordje Pesut (djordje@mips.com)
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* definitions and initialization of LUT table for FFT
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*/
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#include "libavutil/thread.h"
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#include "libavcodec/fft_table.h"
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const int32_t ff_w_tab_sr[MAX_FFT_SIZE/(4*16)] = {
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2147483647, 2147483016, 2147481121, 2147477963, 2147473542, 2147467857, 2147460908, 2147452697,
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2147443222, 2147432484, 2147420483, 2147407218, 2147392690, 2147376899, 2147359845, 2147341527,
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2147321946, 2147301102, 2147278995, 2147255625, 2147230991, 2147205094, 2147177934, 2147149511,
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2147119825, 2147088876, 2147056664, 2147023188, 2146988450, 2146952448, 2146915184, 2146876656,
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2146836866, 2146795813, 2146753497, 2146709917, 2146665076, 2146618971, 2146571603, 2146522973,
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2146473080, 2146421924, 2146369505, 2146315824, 2146260881, 2146204674, 2146147205, 2146088474,
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2146028480, 2145967224, 2145904705, 2145840924, 2145775880, 2145709574, 2145642006, 2145573176,
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2145503083, 2145431729, 2145359112, 2145285233, 2145210092, 2145133690, 2145056025, 2144977098,
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2144896910, 2144815460, 2144732748, 2144648774, 2144563539, 2144477042, 2144389283, 2144300264,
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2144209982, 2144118439, 2144025635, 2143931570, 2143836244, 2143739656, 2143641807, 2143542697,
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2143442326, 2143340694, 2143237802, 2143133648, 2143028234, 2142921559, 2142813624, 2142704427,
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2142593971, 2142482254, 2142369276, 2142255039, 2142139541, 2142022783, 2141904764, 2141785486,
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2141664948, 2141543150, 2141420092, 2141295774, 2141170197, 2141043360, 2140915264, 2140785908,
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2140655293, 2140523418, 2140390284, 2140255892, 2140120240, 2139983329, 2139845159, 2139705730,
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2137142927, 2136980855, 2136817525, 2136652938, 2136487095, 2136319994, 2136151637, 2135982023,
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2135811153, 2135639026, 2135465642, 2135291003, 2135115107, 2134937956, 2134759548, 2134579885,
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1442161874, 1440941030, 1439719338, 1438496799, 1437273414, 1436049184, 1434824109, 1433598189,
|
|
1432371426, 1431143821, 1429915374, 1428686085, 1427455956, 1426224988, 1424993180, 1423760534,
|
|
1422527051, 1421292730, 1420057574, 1418821582, 1417584755, 1416347095, 1415108601, 1413869275,
|
|
1412629117, 1411388129, 1410146309, 1408903661, 1407660183, 1406415878, 1405170745, 1403924785,
|
|
1402678000, 1401430389, 1400181954, 1398932695, 1397682613, 1396431709, 1395179984, 1393927438,
|
|
1392674072, 1391419886, 1390164882, 1388909060, 1387652422, 1386394966, 1385136696, 1383877610,
|
|
1382617710, 1381356997, 1380095472, 1378833134, 1377569986, 1376306026, 1375041258, 1373775680,
|
|
1372509294, 1371242101, 1369974101, 1368705296, 1367435685, 1366165269, 1364894050, 1363622028,
|
|
1362349204, 1361075579, 1359801152, 1358525926, 1357249901, 1355973077, 1354695455, 1353417037,
|
|
1352137822, 1350857812, 1349577007, 1348295409, 1347013017, 1345729833, 1344445857, 1343161090,
|
|
1341875533, 1340589187, 1339302052, 1338014129, 1336725419, 1335435923, 1334145641, 1332854574,
|
|
1331562723, 1330270089, 1328976672, 1327682474, 1326387494, 1325091734, 1323795195, 1322497877,
|
|
1321199781, 1319900907, 1318601257, 1317300832, 1315999631, 1314697657, 1313394909, 1312091388,
|
|
1310787095, 1309482032, 1308176198, 1306869594, 1305562222, 1304254082, 1302945174, 1301635500,
|
|
1300325060, 1299013855, 1297701886, 1296389154, 1295075659, 1293761402, 1292446384, 1291130606,
|
|
1289814068, 1288496772, 1287178717, 1285859905, 1284540337, 1283220013, 1281898935, 1280577102,
|
|
1279254516, 1277931177, 1276607086, 1275282245, 1273956653, 1272630312, 1271303222, 1269975384,
|
|
1268646800, 1267317469, 1265987392, 1264656571, 1263325005, 1261992697, 1260659646, 1259325853,
|
|
1257991320, 1256656047, 1255320034, 1253983283, 1252645794, 1251307568, 1249968606, 1248628909,
|
|
1247288478, 1245947312, 1244605414, 1243262783, 1241919421, 1240575329, 1239230506, 1237884955,
|
|
1236538675, 1235191668, 1233843935, 1232495475, 1231146291, 1229796382, 1228445750, 1227094395,
|
|
1225742318, 1224389521, 1223036002, 1221681765, 1220326809, 1218971135, 1217614743, 1216257636,
|
|
1214899813, 1213541275, 1212182024, 1210822059, 1209461382, 1208099993, 1206737894, 1205375085,
|
|
1204011567, 1202647340, 1201282407, 1199916766, 1198550419, 1197183368, 1195815612, 1194447153,
|
|
1193077991, 1191708127, 1190337562, 1188966297, 1187594332, 1186221669, 1184848308, 1183474250,
|
|
1182099496, 1180724046, 1179347902, 1177971064, 1176593533, 1175215310, 1173836395, 1172456790,
|
|
1171076495, 1169695512, 1168313840, 1166931481, 1165548435, 1164164704, 1162780288, 1161395188,
|
|
1160009405, 1158622939, 1157235792, 1155847964, 1154459456, 1153070269, 1151680403, 1150289860,
|
|
1148898640, 1147506745, 1146114174, 1144720929, 1143327011, 1141932420, 1140537158, 1139141224,
|
|
1137744621, 1136347348, 1134949406, 1133550797, 1132151521, 1130751579, 1129350972, 1127949701,
|
|
1126547765, 1125145168, 1123741908, 1122337987, 1120933406, 1119528166, 1118122267, 1116715710,
|
|
1115308496, 1113900627, 1112492101, 1111082922, 1109673089, 1108262603, 1106851465, 1105439676,
|
|
1104027237, 1102614148, 1101200410, 1099786025, 1098370993, 1096955314, 1095538991, 1094122023,
|
|
1092704411, 1091286156, 1089867259, 1088447722, 1087027544, 1085606726, 1084185270, 1082763176,
|
|
1081340445, 1079917078, 1078493076, 1077068439, 1075643169, 1074217266, 1072790730, 1071363564,
|
|
1069935768, 1068507342, 1067078288, 1065648605, 1064218296, 1062787361, 1061355801, 1059923616,
|
|
1058490808, 1057057377, 1055623324, 1054188651, 1052753357, 1051317443, 1049880912, 1048443763,
|
|
1047005996, 1045567615, 1044128617, 1042689006, 1041248781, 1039807944, 1038366495, 1036924436,
|
|
1035481766, 1034038487, 1032594600, 1031150105, 1029705004, 1028259297, 1026812985, 1025366069,
|
|
1023918550, 1022470428, 1021021705, 1019572382, 1018122458, 1016671936, 1015220816, 1013769098,
|
|
1012316784, 1010863875, 1009410370, 1007956272, 1006501581, 1005046298, 1003590424, 1002133959,
|
|
1000676905, 999219262, 997761031, 996302214, 994842810, 993382821, 991922248, 990461091,
|
|
988999351, 987537030, 986074127, 984610645, 983146583, 981681943, 980216726, 978750932,
|
|
977284562, 975817617, 974350098, 972882006, 971413342, 969944106, 968474300, 967003923,
|
|
965532978, 964061465, 962589385, 961116739, 959643527, 958169751, 956695411, 955220508,
|
|
953745043, 952269017, 950792431, 949315286, 947837582, 946359321, 944880503, 943401129,
|
|
941921200, 940440717, 938959681, 937478092, 935995952, 934513261, 933030021, 931546231,
|
|
930061894, 928577010, 927091579, 925605603, 924119082, 922632018, 921144411, 919656262,
|
|
918167572, 916678342, 915188572, 913698265, 912207419, 910716038, 909224120, 907731667,
|
|
906238681, 904745161, 903251110, 901756526, 900261413, 898765769, 897269597, 895772898,
|
|
894275671, 892777918, 891279640, 889780838, 888281512, 886781663, 885281293, 883780402,
|
|
882278992, 880777062, 879274614, 877771649, 876268167, 874764170, 873259659, 871754633,
|
|
870249095, 868743045, 867236484, 865729413, 864221832, 862713743, 861205147, 859696043,
|
|
858186435, 856676321, 855165703, 853654582, 852142959, 850630835, 849118210, 847605086,
|
|
846091463, 844577343, 843062726, 841547612, 840032004, 838515901, 836999305, 835482217,
|
|
833964638, 832446567, 830928007, 829408958, 827889422, 826369398, 824848888, 823327893,
|
|
821806413, 820284450, 818762005, 817239078, 815715670, 814191782, 812667415, 811142571,
|
|
809617249, 808091450, 806565177, 805038429, 803511207, 801983513, 800455346, 798926709,
|
|
797397602, 795868026, 794337982, 792807470, 791276492, 789745049, 788213141, 786680769,
|
|
785147934, 783614638, 782080880, 780546663, 779011986, 777476851, 775941259, 774405210,
|
|
772868706, 771331747, 769794334, 768256469, 766718151, 765179382, 763640164, 762100496,
|
|
760560380, 759019816, 757478806, 755937350, 754395449, 752853105, 751310318, 749767089,
|
|
748223418, 746679308, 745134758, 743589770, 742044345, 740498483, 738952186, 737405453,
|
|
735858287, 734310688, 732762657, 731214195, 729665303, 728115982, 726566232, 725016055,
|
|
723465451, 721914422, 720362968, 718811090, 717258790, 715706067, 714152924, 712599360,
|
|
711045377, 709490976, 707936158, 706380923, 704825272, 703269207, 701712728, 700155836,
|
|
698598533, 697040818, 695482694, 693924160, 692365218, 690805869, 689246113, 687685952,
|
|
686125387, 684564417, 683003045, 681441272, 679879097, 678316522, 676753549, 675190177,
|
|
673626408, 672062243, 670497682, 668932727, 667367379, 665801638, 664235505, 662668981,
|
|
661102068, 659534766, 657967075, 656398998, 654830535, 653261686, 651692453, 650122837,
|
|
648552838, 646982457, 645411696, 643840556, 642269036, 640697139, 639124865, 637552215,
|
|
635979190, 634405791, 632832018, 631257873, 629683357, 628108471, 626533215, 624957590,
|
|
623381598, 621805239, 620228514, 618651424, 617073971, 615496154, 613917975, 612339436,
|
|
610760536, 609181276, 607601658, 606021683, 604441352, 602860664, 601279623, 599698227,
|
|
598116479, 596534378, 594951927, 593369126, 591785976, 590202477, 588618632, 587034440,
|
|
585449903, 583865021, 582279796, 580694229, 579108320, 577522070, 575935480, 574348552,
|
|
572761285, 571173682, 569585743, 567997469, 566408860, 564819919, 563230645, 561641039,
|
|
560051104, 558460839, 556870245, 555279324, 553688076, 552096502, 550504604, 548912382,
|
|
547319836, 545726969, 544133781, 542540273, 540946445, 539352300, 537757837, 536163058,
|
|
534567963, 532972554, 531376831, 529780796, 528184449, 526587791, 524990824, 523393547,
|
|
521795963, 520198072, 518599875, 517001373, 515402566, 513803457, 512204045, 510604332,
|
|
509004318, 507404005, 505803394, 504202485, 502601279, 500999778, 499397982, 497795892,
|
|
496193509, 494590835, 492987869, 491384614, 489781069, 488177236, 486573117, 484968710,
|
|
483364019, 481759043, 480153784, 478548243, 476942419, 475336316, 473729932, 472123270,
|
|
470516330, 468909114, 467301622, 465693854, 464085813, 462477499, 460868912, 459260055,
|
|
457650927, 456041530, 454431865, 452821933, 451211734, 449601270, 447990541, 446379549,
|
|
444768294, 443156777, 441545000, 439932963, 438320667, 436708113, 435095303, 433482236,
|
|
431868915, 430255339, 428641511, 427027430, 425413098, 423798515, 422183684, 420568604,
|
|
418953276, 417337703, 415721883, 414105819, 412489512, 410872962, 409256170, 407639137,
|
|
406021865, 404404353, 402786604, 401168618, 399550396, 397931939, 396313247, 394694323,
|
|
393075166, 391455778, 389836160, 388216313, 386596237, 384975934, 383355404, 381734649,
|
|
380113669, 378492466, 376871039, 375249392, 373627523, 372005435, 370383128, 368760603,
|
|
367137861, 365514903, 363891730, 362268343, 360644742, 359020930, 357396906, 355772673,
|
|
354148230, 352523578, 350898719, 349273654, 347648383, 346022908, 344397230, 342771348,
|
|
341145265, 339518981, 337892498, 336265816, 334638936, 333011859, 331384586, 329757119,
|
|
328129457, 326501602, 324873555, 323245317, 321616889, 319988272, 318359466, 316730474,
|
|
315101295, 313471930, 311842381, 310212649, 308582734, 306952638, 305322361, 303691904,
|
|
302061269, 300430456, 298799466, 297168301, 295536961, 293905447, 292273760, 290641901,
|
|
289009871, 287377671, 285745302, 284112765, 282480061, 280847190, 279214155, 277580955,
|
|
275947592, 274314066, 272680379, 271046532, 269412525, 267778360, 266144038, 264509558,
|
|
262874923, 261240134, 259605191, 257970095, 256334847, 254699448, 253063900, 251428203,
|
|
249792358, 248156366, 246520228, 244883945, 243247518, 241610947, 239974235, 238337382,
|
|
236700388, 235063255, 233425984, 231788575, 230151030, 228513350, 226875535, 225237587,
|
|
223599506, 221961294, 220322951, 218684479, 217045878, 215407149, 213768293, 212129312,
|
|
210490206, 208850976, 207211624, 205572149, 203932553, 202292838, 200653003, 199013051,
|
|
197372981, 195732795, 194092495, 192452080, 190811551, 189170911, 187530159, 185889297,
|
|
184248325, 182607245, 180966058, 179324764, 177683365, 176041861, 174400254, 172758544,
|
|
171116733, 169474820, 167832808, 166190698, 164548489, 162906184, 161263783, 159621287,
|
|
157978697, 156336015, 154693240, 153050374, 151407418, 149764374, 148121241, 146478021,
|
|
144834714, 143191323, 141547847, 139904288, 138260647, 136616925, 134973122, 133329239,
|
|
131685278, 130041240, 128397125, 126752935, 125108670, 123464332, 121819921, 120175438,
|
|
118530885, 116886262, 115241570, 113596810, 111951983, 110307091, 108662134, 107017112,
|
|
105372028, 103726882, 102081675, 100436408, 98791081, 97145697, 95500255, 93854758,
|
|
92209205, 90563597, 88917937, 87272224, 85626460, 83980645, 82334782, 80688869,
|
|
79042909, 77396903, 75750851, 74104755, 72458615, 70812432, 69166208, 67519943,
|
|
65873638, 64227295, 62580914, 60934496, 59288042, 57641553, 55995030, 54348475,
|
|
52701887, 51055268, 49408620, 47761942, 46115236, 44468503, 42821744, 41174960,
|
|
39528151, 37881320, 36234466, 34587590, 32940695, 31293780, 29646846, 27999895,
|
|
26352928, 24705945, 23058947, 21411936, 19764913, 18117878, 16470832, 14823776,
|
|
13176712, 11529640, 9882561, 8235476, 6588387, 4941294, 3294197, 1647099
|
|
};
|
|
|
|
uint16_t ff_fft_offsets_lut[21845];
|
|
|
|
static void fft_lut_init(uint16_t *table, int off, int size, int *index)
|
|
{
|
|
if (size < 16) {
|
|
table[*index] = off >> 2;
|
|
(*index)++;
|
|
}
|
|
else {
|
|
fft_lut_init(table, off, size >> 1, index);
|
|
fft_lut_init(table, off + (size >> 1), size >> 2, index);
|
|
fft_lut_init(table, off + 3 * (size >> 2), size >> 2, index);
|
|
}
|
|
}
|
|
|
|
static void fft_lut_init_start(void)
|
|
{
|
|
int n = 0;
|
|
|
|
fft_lut_init(ff_fft_offsets_lut, 0, 1 << 17, &n);
|
|
}
|
|
|
|
void ff_fft_lut_init(void)
|
|
{
|
|
static AVOnce init_once = AV_ONCE_INIT;
|
|
|
|
ff_thread_once(&init_once, fft_lut_init_start);
|
|
}
|