FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
fft_init_table.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2012
3  * MIPS Technologies, Inc., California.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the MIPS Technologies, Inc., nor the names of its
14  * contributors may be used to endorse or promote products derived from
15  * this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * Authors: Stanislav Ocovaj (socovaj@mips.com)
30  * Goran Cordasic (goran@mips.com)
31  * Djordje Pesut (djordje@mips.com)
32  *
33  * This file is part of FFmpeg.
34  *
35  * FFmpeg is free software; you can redistribute it and/or
36  * modify it under the terms of the GNU Lesser General Public
37  * License as published by the Free Software Foundation; either
38  * version 2.1 of the License, or (at your option) any later version.
39  *
40  * FFmpeg is distributed in the hope that it will be useful,
41  * but WITHOUT ANY WARRANTY; without even the implied warranty of
42  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
43  * Lesser General Public License for more details.
44  *
45  * You should have received a copy of the GNU Lesser General Public
46  * License along with FFmpeg; if not, write to the Free Software
47  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
48  */
49 
50 /**
51  * @file
52  * definitions and initialization of LUT table for FFT
53  */
54 #include "libavcodec/fft_table.h"
55 
56 const int32_t ff_w_tab_sr[MAX_FFT_SIZE/(4*16)] = {
57  2147483647, 2147481121, 2147473542, 2147460908, 2147443222, 2147420483, 2147392690, 2147359845,
58  2147321946, 2147278995, 2147230991, 2147177934, 2147119825, 2147056664, 2146988450, 2146915184,
59  2146836866, 2146753497, 2146665076, 2146571603, 2146473080, 2146369505, 2146260881, 2146147205,
60  2146028480, 2145904705, 2145775880, 2145642006, 2145503083, 2145359112, 2145210092, 2145056025,
61  2144896910, 2144732748, 2144563539, 2144389283, 2144209982, 2144025635, 2143836244, 2143641807,
62  2143442326, 2143237802, 2143028234, 2142813624, 2142593971, 2142369276, 2142139541, 2141904764,
63  2141664948, 2141420092, 2141170197, 2140915264, 2140655293, 2140390284, 2140120240, 2139845159,
64  2139565043, 2139279892, 2138989708, 2138694490, 2138394240, 2138088958, 2137778644, 2137463301,
65  2137142927, 2136817525, 2136487095, 2136151637, 2135811153, 2135465642, 2135115107, 2134759548,
66  2134398966, 2134033361, 2133662734, 2133287087, 2132906420, 2132520734, 2132130030, 2131734309,
67  2131333572, 2130927819, 2130517052, 2130101272, 2129680480, 2129254676, 2128823862, 2128388038,
68  2127947206, 2127501367, 2127050522, 2126594672, 2126133817, 2125667960, 2125197100, 2124721240,
69  2124240380, 2123754522, 2123263666, 2122767814, 2122266967, 2121761126, 2121250292, 2120734467,
70  2120213651, 2119687847, 2119157054, 2118621275, 2118080511, 2117534762, 2116984031, 2116428319,
71  2115867626, 2115301954, 2114731305, 2114155680, 2113575080, 2112989506, 2112398960, 2111803444,
72  2111202959, 2110597505, 2109987085, 2109371700, 2108751352, 2108126041, 2107495770, 2106860540,
73  2106220352, 2105575208, 2104925109, 2104270057, 2103610054, 2102945101, 2102275199, 2101600350,
74  2100920556, 2100235819, 2099546139, 2098851519, 2098151960, 2097447464, 2096738032, 2096023667,
75  2095304370, 2094580142, 2093850985, 2093116901, 2092377892, 2091633960, 2090885105, 2090131331,
76  2089372638, 2088609029, 2087840505, 2087067068, 2086288720, 2085505463, 2084717298, 2083924228,
77  2083126254, 2082323379, 2081515603, 2080702930, 2079885360, 2079062896, 2078235540, 2077403294,
78  2076566160, 2075724139, 2074877233, 2074025446, 2073168777, 2072307231, 2071440808, 2070569511,
79  2069693342, 2068812302, 2067926394, 2067035621, 2066139983, 2065239484, 2064334124, 2063423908,
80  2062508835, 2061588910, 2060664133, 2059734508, 2058800036, 2057860719, 2056916560, 2055967560,
81  2055013723, 2054055050, 2053091544, 2052123207, 2051150040, 2050172048, 2049189231, 2048201592,
82  2047209133, 2046211857, 2045209767, 2044202863, 2043191150, 2042174628, 2041153301, 2040127172,
83  2039096241, 2038060512, 2037019988, 2035974670, 2034924562, 2033869665, 2032809982, 2031745516,
84  2030676269, 2029602243, 2028523442, 2027439867, 2026351522, 2025258408, 2024160529, 2023057887,
85  2021950484, 2020838323, 2019721407, 2018599739, 2017473321, 2016342155, 2015206245, 2014065592,
86  2012920201, 2011770073, 2010615210, 2009455617, 2008291295, 2007122248, 2005948478, 2004769987,
87  2003586779, 2002398857, 2001206222, 2000008879, 1998806829, 1997600076, 1996388622, 1995172471,
88  1993951625, 1992726087, 1991495860, 1990260946, 1989021350, 1987777073, 1986528118, 1985274489,
89  1984016189, 1982753220, 1981485585, 1980213288, 1978936331, 1977654717, 1976368450, 1975077532,
90  1973781967, 1972481757, 1971176906, 1969867417, 1968553292, 1967234535, 1965911148, 1964583136,
91  1963250501, 1961913246, 1960571375, 1959224890, 1957873796, 1956518093, 1955157788, 1953792881,
92  1952423377, 1951049279, 1949670589, 1948287312, 1946899451, 1945507008, 1944109987, 1942708392,
93  1941302225, 1939891490, 1938476190, 1937056329, 1935631910, 1934202936, 1932769411, 1931331338,
94  1929888720, 1928441561, 1926989864, 1925533633, 1924072871, 1922607581, 1921137767, 1919663432,
95  1918184581, 1916701216, 1915213340, 1913720958, 1912224073, 1910722688, 1909216806, 1907706433,
96  1906191570, 1904672222, 1903148392, 1901620084, 1900087301, 1898550047, 1897008325, 1895462140,
97  1893911494, 1892356392, 1890796837, 1889232832, 1887664383, 1886091491, 1884514161, 1882932397,
98  1881346202, 1879755580, 1878160535, 1876561070, 1874957189, 1873348897, 1871736196, 1870119091,
99  1868497586, 1866871683, 1865241388, 1863606704, 1861967634, 1860324183, 1858676355, 1857024153,
100  1855367581, 1853706643, 1852041343, 1850371686, 1848697674, 1847019312, 1845336604, 1843649553,
101  1841958164, 1840262441, 1838562388, 1836858008, 1835149306, 1833436286, 1831718951, 1829997307,
102  1828271356, 1826541103, 1824806552, 1823067707, 1821324572, 1819577151, 1817825449, 1816069469,
103  1814309216, 1812544694, 1810775906, 1809002858, 1807225553, 1805443995, 1803658189, 1801868139,
104  1800073849, 1798275323, 1796472565, 1794665580, 1792854372, 1791038946, 1789219305, 1787395453,
105  1785567396, 1783735137, 1781898681, 1780058032, 1778213194, 1776364172, 1774510970, 1772653593,
106  1770792044, 1768926328, 1767056450, 1765182414, 1763304224, 1761421885, 1759535401, 1757644777,
107  1755750017, 1753851126, 1751948107, 1750040966, 1748129707, 1746214334, 1744294853, 1742371267,
108  1740443581, 1738511799, 1736575927, 1734635968, 1732691928, 1730743810, 1728791620, 1726835361,
109  1724875040, 1722910659, 1720942225, 1718969740, 1716993211, 1715012642, 1713028037, 1711039401,
110  1709046739, 1707050055, 1705049355, 1703044642, 1701035922, 1699023199, 1697006479, 1694985765,
111  1692961062, 1690932376, 1688899711, 1686863072, 1684822463, 1682777890, 1680729357, 1678676870,
112  1676620432, 1674560049, 1672495725, 1670427466, 1668355276, 1666279161, 1664199124, 1662115172,
113  1660027308, 1657935539, 1655839867, 1653740300, 1651636841, 1649529496, 1647418269, 1645303166,
114  1643184191, 1641061349, 1638934646, 1636804087, 1634669676, 1632531418, 1630389319, 1628243383,
115  1626093616, 1623940023, 1621782608, 1619621377, 1617456335, 1615287487, 1613114838, 1610938393,
116  1608758157, 1606574136, 1604386335, 1602194758, 1599999411, 1597800299, 1595597428, 1593390801,
117  1591180426, 1588966306, 1586748447, 1584526854, 1582301533, 1580072489, 1577839726, 1575603251,
118  1573363068, 1571119183, 1568871601, 1566620327, 1564365367, 1562106725, 1559844408, 1557578421,
119  1555308768, 1553035455, 1550758488, 1548477872, 1546193612, 1543905714, 1541614183, 1539319024,
120  1537020244, 1534717846, 1532411837, 1530102222, 1527789007, 1525472197, 1523151797, 1520827813,
121  1518500250, 1516169114, 1513834411, 1511496145, 1509154322, 1506808949, 1504460029, 1502107570,
122  1499751576, 1497392053, 1495029006, 1492662441, 1490292364, 1487918781, 1485541696, 1483161115,
123  1480777044, 1478389489, 1475998456, 1473603949, 1471205974, 1468804538, 1466399645, 1463991302,
124  1461579514, 1459164286, 1456745625, 1454323536, 1451898025, 1449469098, 1447036760, 1444601017,
125  1442161874, 1439719338, 1437273414, 1434824109, 1432371426, 1429915374, 1427455956, 1424993180,
126  1422527051, 1420057574, 1417584755, 1415108601, 1412629117, 1410146309, 1407660183, 1405170745,
127  1402678000, 1400181954, 1397682613, 1395179984, 1392674072, 1390164882, 1387652422, 1385136696,
128  1382617710, 1380095472, 1377569986, 1375041258, 1372509294, 1369974101, 1367435685, 1364894050,
129  1362349204, 1359801152, 1357249901, 1354695455, 1352137822, 1349577007, 1347013017, 1344445857,
130  1341875533, 1339302052, 1336725419, 1334145641, 1331562723, 1328976672, 1326387494, 1323795195,
131  1321199781, 1318601257, 1315999631, 1313394909, 1310787095, 1308176198, 1305562222, 1302945174,
132  1300325060, 1297701886, 1295075659, 1292446384, 1289814068, 1287178717, 1284540337, 1281898935,
133  1279254516, 1276607086, 1273956653, 1271303222, 1268646800, 1265987392, 1263325005, 1260659646,
134  1257991320, 1255320034, 1252645794, 1249968606, 1247288478, 1244605414, 1241919421, 1239230506,
135  1236538675, 1233843935, 1231146291, 1228445750, 1225742318, 1223036002, 1220326809, 1217614743,
136  1214899813, 1212182024, 1209461382, 1206737894, 1204011567, 1201282407, 1198550419, 1195815612,
137  1193077991, 1190337562, 1187594332, 1184848308, 1182099496, 1179347902, 1176593533, 1173836395,
138  1171076495, 1168313840, 1165548435, 1162780288, 1160009405, 1157235792, 1154459456, 1151680403,
139  1148898640, 1146114174, 1143327011, 1140537158, 1137744621, 1134949406, 1132151521, 1129350972,
140  1126547765, 1123741908, 1120933406, 1118122267, 1115308496, 1112492101, 1109673089, 1106851465,
141  1104027237, 1101200410, 1098370993, 1095538991, 1092704411, 1089867259, 1087027544, 1084185270,
142  1081340445, 1078493076, 1075643169, 1072790730, 1069935768, 1067078288, 1064218296, 1061355801,
143  1058490808, 1055623324, 1052753357, 1049880912, 1047005996, 1044128617, 1041248781, 1038366495,
144  1035481766, 1032594600, 1029705004, 1026812985, 1023918550, 1021021705, 1018122458, 1015220816,
145  1012316784, 1009410370, 1006501581, 1003590424, 1000676905, 997761031, 994842810, 991922248,
146  988999351, 986074127, 983146583, 980216726, 977284562, 974350098, 971413342, 968474300,
147  965532978, 962589385, 959643527, 956695411, 953745043, 950792431, 947837582, 944880503,
148  941921200, 938959681, 935995952, 933030021, 930061894, 927091579, 924119082, 921144411,
149  918167572, 915188572, 912207419, 909224120, 906238681, 903251110, 900261413, 897269597,
150  894275671, 891279640, 888281512, 885281293, 882278992, 879274614, 876268167, 873259659,
151  870249095, 867236484, 864221832, 861205147, 858186435, 855165703, 852142959, 849118210,
152  846091463, 843062726, 840032004, 836999305, 833964638, 830928007, 827889422, 824848888,
153  821806413, 818762005, 815715670, 812667415, 809617249, 806565177, 803511207, 800455346,
154  797397602, 794337982, 791276492, 788213141, 785147934, 782080880, 779011986, 775941259,
155  772868706, 769794334, 766718151, 763640164, 760560380, 757478806, 754395449, 751310318,
156  748223418, 745134758, 742044345, 738952186, 735858287, 732762657, 729665303, 726566232,
157  723465451, 720362968, 717258790, 714152924, 711045377, 707936158, 704825272, 701712728,
158  698598533, 695482694, 692365218, 689246113, 686125387, 683003045, 679879097, 676753549,
159  673626408, 670497682, 667367379, 664235505, 661102068, 657967075, 654830535, 651692453,
160  648552838, 645411696, 642269036, 639124865, 635979190, 632832018, 629683357, 626533215,
161  623381598, 620228514, 617073971, 613917975, 610760536, 607601658, 604441352, 601279623,
162  598116479, 594951927, 591785976, 588618632, 585449903, 582279796, 579108320, 575935480,
163  572761285, 569585743, 566408860, 563230645, 560051104, 556870245, 553688076, 550504604,
164  547319836, 544133781, 540946445, 537757837, 534567963, 531376831, 528184449, 524990824,
165  521795963, 518599875, 515402566, 512204045, 509004318, 505803394, 502601279, 499397982,
166  496193509, 492987869, 489781069, 486573117, 483364019, 480153784, 476942419, 473729932,
167  470516330, 467301622, 464085813, 460868912, 457650927, 454431865, 451211734, 447990541,
168  444768294, 441545000, 438320667, 435095303, 431868915, 428641511, 425413098, 422183684,
169  418953276, 415721883, 412489512, 409256170, 406021865, 402786604, 399550396, 396313247,
170  393075166, 389836160, 386596237, 383355404, 380113669, 376871039, 373627523, 370383128,
171  367137861, 363891730, 360644742, 357396906, 354148230, 350898719, 347648383, 344397230,
172  341145265, 337892498, 334638936, 331384586, 328129457, 324873555, 321616889, 318359466,
173  315101295, 311842381, 308582734, 305322361, 302061269, 298799466, 295536961, 292273760,
174  289009871, 285745302, 282480061, 279214155, 275947592, 272680379, 269412525, 266144038,
175  262874923, 259605191, 256334847, 253063900, 249792358, 246520228, 243247518, 239974235,
176  236700388, 233425984, 230151030, 226875535, 223599506, 220322951, 217045878, 213768293,
177  210490206, 207211624, 203932553, 200653003, 197372981, 194092495, 190811551, 187530159,
178  184248325, 180966058, 177683365, 174400254, 171116733, 167832808, 164548489, 161263783,
179  157978697, 154693240, 151407418, 148121241, 144834714, 141547847, 138260647, 134973122,
180  131685278, 128397125, 125108670, 121819921, 118530885, 115241570, 111951983, 108662134,
181  105372028, 102081675, 98791081, 95500255, 92209205, 88917937, 85626460, 82334782,
182  79042909, 75750851, 72458615, 69166208, 65873638, 62580914, 59288042, 55995030,
183  52701887, 49408620, 46115236, 42821744, 39528151, 36234466, 32940695, 29646846,
184  26352928, 23058947, 19764913, 16470832, 13176712, 9882561, 6588387, 3294197
185 };
186 
187 uint16_t ff_fft_offsets_lut[0x2aab];
188 
189 void ff_fft_lut_init(uint16_t *table, int off, int size, int *index)
190 {
191  if (size < 16) {
192  table[*index] = off >> 2;
193  (*index)++;
194  }
195  else {
196  ff_fft_lut_init(table, off, size>>1, index);
197  ff_fft_lut_init(table, off+(size>>1), size>>2, index);
198  ff_fft_lut_init(table, off+3*(size>>2), size>>2, index);
199  }
200 }
Generated on Sun Mar 8 2015 02:34:51 for FFmpeg by   doxygen 1.8.2