|
|
|
|
/*
|
|
|
|
|
* MACE decoder
|
|
|
|
|
* Copyright (c) 2002 Laszlo Torok <torokl@alpha.dfmk.hu>
|
|
|
|
|
*
|
|
|
|
|
* This file is part of FFmpeg.
|
|
|
|
|
*
|
|
|
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
|
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
|
|
|
* License as published by the Free Software Foundation; either
|
|
|
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
|
|
|
*
|
|
|
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
|
* Lesser General Public License for more details.
|
|
|
|
|
*
|
|
|
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
|
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* @file mace.c
|
|
|
|
|
* MACE decoder.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#include "avcodec.h"
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Adapted to ffmpeg by Francois Revol <revol@free.fr>
|
|
|
|
|
* (removed 68k REG stuff, changed types, added some statics and consts,
|
|
|
|
|
* libavcodec api, context stuff, interlaced stereo out).
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
static const uint16_t MACEtab1[] = { 0xfff3, 0x0008, 0x004c, 0x00de, 0x00de, 0x004c, 0x0008, 0xfff3 };
|
|
|
|
|
|
|
|
|
|
static const uint16_t MACEtab3[] = { 0xffee, 0x008c, 0x008c, 0xffee };
|
|
|
|
|
|
|
|
|
|
static const int16_t MACEtab2[][8] = {
|
|
|
|
|
{ 37, 116, 206, 330, -331, -207, -117, -38},
|
|
|
|
|
{ 39, 121, 216, 346, -347, -217, -122, -40},
|
|
|
|
|
{ 41, 127, 225, 361, -362, -226, -128, -42},
|
|
|
|
|
{ 42, 132, 235, 377, -378, -236, -133, -43},
|
|
|
|
|
{ 44, 137, 245, 392, -393, -246, -138, -45},
|
|
|
|
|
{ 46, 144, 256, 410, -411, -257, -145, -47},
|
|
|
|
|
{ 48, 150, 267, 428, -429, -268, -151, -49},
|
|
|
|
|
{ 51, 157, 280, 449, -450, -281, -158, -52},
|
|
|
|
|
{ 53, 165, 293, 470, -471, -294, -166, -54},
|
|
|
|
|
{ 55, 172, 306, 490, -491, -307, -173, -56},
|
|
|
|
|
{ 58, 179, 319, 511, -512, -320, -180, -59},
|
|
|
|
|
{ 60, 187, 333, 534, -535, -334, -188, -61},
|
|
|
|
|
{ 63, 195, 348, 557, -558, -349, -196, -64},
|
|
|
|
|
{ 66, 205, 364, 583, -584, -365, -206, -67},
|
|
|
|
|
{ 69, 214, 380, 609, -610, -381, -215, -70},
|
|
|
|
|
{ 72, 223, 396, 635, -636, -397, -224, -73},
|
|
|
|
|
{ 75, 233, 414, 663, -664, -415, -234, -76},
|
|
|
|
|
{ 79, 244, 433, 694, -695, -434, -245, -80},
|
|
|
|
|
{ 82, 254, 453, 725, -726, -454, -255, -83},
|
|
|
|
|
{ 86, 265, 472, 756, -757, -473, -266, -87},
|
|
|
|
|
{ 90, 278, 495, 792, -793, -496, -279, -91},
|
|
|
|
|
{ 94, 290, 516, 826, -827, -517, -291, -95},
|
|
|
|
|
{ 98, 303, 538, 862, -863, -539, -304, -99},
|
|
|
|
|
{ 102, 316, 562, 901, -902, -563, -317, -103},
|
|
|
|
|
{ 107, 331, 588, 942, -943, -589, -332, -108},
|
|
|
|
|
{ 112, 345, 614, 983, -984, -615, -346, -113},
|
|
|
|
|
{ 117, 361, 641, 1027, -1028, -642, -362, -118},
|
|
|
|
|
{ 122, 377, 670, 1074, -1075, -671, -378, -123},
|
|
|
|
|
{ 127, 394, 701, 1123, -1124, -702, -395, -128},
|
|
|
|
|
{ 133, 411, 732, 1172, -1173, -733, -412, -134},
|
|
|
|
|
{ 139, 430, 764, 1224, -1225, -765, -431, -140},
|
|
|
|
|
{ 145, 449, 799, 1280, -1281, -800, -450, -146},
|
|
|
|
|
{ 152, 469, 835, 1337, -1338, -836, -470, -153},
|
|
|
|
|
{ 159, 490, 872, 1397, -1398, -873, -491, -160},
|
|
|
|
|
{ 166, 512, 911, 1459, -1460, -912, -513, -167},
|
|
|
|
|
{ 173, 535, 951, 1523, -1524, -952, -536, -174},
|
|
|
|
|
{ 181, 558, 993, 1590, -1591, -994, -559, -182},
|
|
|
|
|
{ 189, 584, 1038, 1663, -1664, -1039, -585, -190},
|
|
|
|
|
{ 197, 610, 1085, 1738, -1739, -1086, -611, -198},
|
|
|
|
|
{ 206, 637, 1133, 1815, -1816, -1134, -638, -207},
|
|
|
|
|
{ 215, 665, 1183, 1895, -1896, -1184, -666, -216},
|
|
|
|
|
{ 225, 695, 1237, 1980, -1981, -1238, -696, -226},
|
|
|
|
|
{ 235, 726, 1291, 2068, -2069, -1292, -727, -236},
|
|
|
|
|
{ 246, 759, 1349, 2161, -2162, -1350, -760, -247},
|
|
|
|
|
{ 257, 792, 1409, 2257, -2258, -1410, -793, -258},
|
|
|
|
|
{ 268, 828, 1472, 2357, -2358, -1473, -829, -269},
|
|
|
|
|
{ 280, 865, 1538, 2463, -2464, -1539, -866, -281},
|
|
|
|
|
{ 293, 903, 1606, 2572, -2573, -1607, -904, -294},
|
|
|
|
|
{ 306, 944, 1678, 2688, -2689, -1679, -945, -307},
|
|
|
|
|
{ 319, 986, 1753, 2807, -2808, -1754, -987, -320},
|
|
|
|
|
{ 334, 1030, 1832, 2933, -2934, -1833, -1031, -335},
|
|
|
|
|
{ 349, 1076, 1914, 3065, -3066, -1915, -1077, -350},
|
|
|
|
|
{ 364, 1124, 1999, 3202, -3203, -2000, -1125, -365},
|
|
|
|
|
{ 380, 1174, 2088, 3344, -3345, -2089, -1175, -381},
|
|
|
|
|
{ 398, 1227, 2182, 3494, -3495, -2183, -1228, -399},
|
|
|
|
|
{ 415, 1281, 2278, 3649, -3650, -2279, -1282, -416},
|
|
|
|
|
{ 434, 1339, 2380, 3811, -3812, -2381, -1340, -435},
|
|
|
|
|
{ 453, 1398, 2486, 3982, -3983, -2487, -1399, -454},
|
|
|
|
|
{ 473, 1461, 2598, 4160, -4161, -2599, -1462, -474},
|
|
|
|
|
{ 495, 1526, 2714, 4346, -4347, -2715, -1527, -496},
|
|
|
|
|
{ 517, 1594, 2835, 4540, -4541, -2836, -1595, -518},
|
|
|
|
|
{ 540, 1665, 2961, 4741, -4742, -2962, -1666, -541},
|
|
|
|
|
{ 564, 1740, 3093, 4953, -4954, -3094, -1741, -565},
|
|
|
|
|
{ 589, 1818, 3232, 5175, -5176, -3233, -1819, -590},
|
|
|
|
|
{ 615, 1898, 3375, 5405, -5406, -3376, -1899, -616},
|
|
|
|
|
{ 643, 1984, 3527, 5647, -5648, -3528, -1985, -644},
|
|
|
|
|
{ 671, 2072, 3683, 5898, -5899, -3684, -2073, -672},
|
|
|
|
|
{ 701, 2164, 3848, 6161, -6162, -3849, -2165, -702},
|
|
|
|
|
{ 733, 2261, 4020, 6438, -6439, -4021, -2262, -734},
|
|
|
|
|
{ 766, 2362, 4199, 6724, -6725, -4200, -2363, -767},
|
|
|
|
|
{ 800, 2467, 4386, 7024, -7025, -4387, -2468, -801},
|
|
|
|
|
{ 836, 2578, 4583, 7339, -7340, -4584, -2579, -837},
|
|
|
|
|
{ 873, 2692, 4786, 7664, -7665, -4787, -2693, -874},
|
|
|
|
|
{ 912, 2813, 5001, 8008, -8009, -5002, -2814, -913},
|
|
|
|
|
{ 952, 2938, 5223, 8364, -8365, -5224, -2939, -953},
|
|
|
|
|
{ 995, 3070, 5457, 8739, -8740, -5458, -3071, -996},
|
|
|
|
|
{ 1039, 3207, 5701, 9129, -9130, -5702, -3208, -1040},
|
|
|
|
|
{ 1086, 3350, 5956, 9537, -9538, -5957, -3351, -1087},
|
|
|
|
|
{ 1134, 3499, 6220, 9960, -9961, -6221, -3500, -1135},
|
|
|
|
|
{ 1185, 3655, 6497, 10404, -10405, -6498, -3656, -1186},
|
|
|
|
|
{ 1238, 3818, 6788, 10869, -10870, -6789, -3819, -1239},
|
|
|
|
|
{ 1293, 3989, 7091, 11355, -11356, -7092, -3990, -1294},
|
|
|
|
|
{ 1351, 4166, 7407, 11861, -11862, -7408, -4167, -1352},
|
|
|
|
|
{ 1411, 4352, 7738, 12390, -12391, -7739, -4353, -1412},
|
|
|
|
|
{ 1474, 4547, 8084, 12946, -12947, -8085, -4548, -1475},
|
|
|
|
|
{ 1540, 4750, 8444, 13522, -13523, -8445, -4751, -1541},
|
|
|
|
|
{ 1609, 4962, 8821, 14126, -14127, -8822, -4963, -1610},
|
|
|
|
|
{ 1680, 5183, 9215, 14756, -14757, -9216, -5184, -1681},
|
|
|
|
|
{ 1756, 5415, 9626, 15415, -15416, -9627, -5416, -1757},
|
|
|
|
|
{ 1834, 5657, 10057, 16104, -16105, -10058, -5658, -1835},
|
|
|
|
|
{ 1916, 5909, 10505, 16822, -16823, -10506, -5910, -1917},
|
|
|
|
|
{ 2001, 6173, 10975, 17574, -17575, -10976, -6174, -2002},
|
|
|
|
|
{ 2091, 6448, 11463, 18356, -18357, -11464, -6449, -2092},
|
|
|
|
|
{ 2184, 6736, 11974, 19175, -19176, -11975, -6737, -2185},
|
|
|
|
|
{ 2282, 7037, 12510, 20032, -20033, -12511, -7038, -2283},
|
|
|
|
|
{ 2383, 7351, 13068, 20926, -20927, -13069, -7352, -2384},
|
|
|
|
|
{ 2490, 7679, 13652, 21861, -21862, -13653, -7680, -2491},
|
|
|
|
|
{ 2601, 8021, 14260, 22834, -22835, -14261, -8022, -2602},
|
|
|
|
|
{ 2717, 8380, 14897, 23854, -23855, -14898, -8381, -2718},
|
|
|
|
|
{ 2838, 8753, 15561, 24918, -24919, -15562, -8754, -2839},
|
|
|
|
|
{ 2965, 9144, 16256, 26031, -26032, -16257, -9145, -2966},
|
|
|
|
|
{ 3097, 9553, 16982, 27193, -27194, -16983, -9554, -3098},
|
|
|
|
|
{ 3236, 9979, 17740, 28407, -28408, -17741, -9980, -3237},
|
|
|
|
|
{ 3380, 10424, 18532, 29675, -29676, -18533, -10425, -3381},
|
|
|
|
|
{ 3531, 10890, 19359, 31000, -31001, -19360, -10891, -3532},
|
|
|
|
|
{ 3688, 11375, 20222, 32382, -32383, -20223, -11376, -3689},
|
|
|
|
|
{ 3853, 11883, 21125, 32767, -32768, -21126, -11884, -3854},
|
|
|
|
|
{ 4025, 12414, 22069, 32767, -32768, -22070, -12415, -4026},
|
|
|
|
|
{ 4205, 12967, 23053, 32767, -32768, -23054, -12968, -4206},
|
|
|
|
|
{ 4392, 13546, 24082, 32767, -32768, -24083, -13547, -4393},
|
|
|
|
|
{ 4589, 14151, 25157, 32767, -32768, -25158, -14152, -4590},
|
|
|
|
|
{ 4793, 14783, 26280, 32767, -32768, -26281, -14784, -4794},
|
|
|
|
|
{ 5007, 15442, 27452, 32767, -32768, -27453, -15443, -5008},
|
|
|
|
|
{ 5231, 16132, 28678, 32767, -32768, -28679, -16133, -5232},
|
|
|
|
|
{ 5464, 16851, 29957, 32767, -32768, -29958, -16852, -5465},
|
|
|
|
|
{ 5708, 17603, 31294, 32767, -32768, -31295, -17604, -5709},
|
|
|
|
|
{ 5963, 18389, 32691, 32767, -32768, -32692, -18390, -5964},
|
|
|
|
|
{ 6229, 19210, 32767, 32767, -32768, -32768, -19211, -6230},
|
|
|
|
|
{ 6507, 20067, 32767, 32767, -32768, -32768, -20068, -6508},
|
|
|
|
|
{ 6797, 20963, 32767, 32767, -32768, -32768, -20964, -6798},
|
|
|
|
|
{ 7101, 21899, 32767, 32767, -32768, -32768, -21900, -7102},
|
|
|
|
|
{ 7418, 22876, 32767, 32767, -32768, -32768, -22877, -7419},
|
|
|
|
|
{ 7749, 23897, 32767, 32767, -32768, -32768, -23898, -7750},
|
|
|
|
|
{ 8095, 24964, 32767, 32767, -32768, -32768, -24965, -8096},
|
|
|
|
|
{ 8456, 26078, 32767, 32767, -32768, -32768, -26079, -8457},
|
|
|
|
|
{ 8833, 27242, 32767, 32767, -32768, -32768, -27243, -8834},
|
|
|
|
|
{ 9228, 28457, 32767, 32767, -32768, -32768, -28458, -9229},
|
|
|
|
|
{ 9639, 29727, 32767, 32767, -32768, -32768, -29728, -9640}
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
static const int16_t MACEtab4[][4] = {
|
|
|
|
|
{ 64, 216, -217, -65}, { 67, 226, -227, -68},
|
|
|
|
|
{ 70, 236, -237, -71}, { 74, 246, -247, -75},
|
|
|
|
|
{ 77, 257, -258, -78}, { 80, 268, -269, -81},
|
|
|
|
|
{ 84, 280, -281, -85}, { 88, 294, -295, -89},
|
|
|
|
|
{ 92, 307, -308, -93}, { 96, 321, -322, -97},
|
|
|
|
|
{ 100, 334, -335, -101}, { 104, 350, -351, -105},
|
|
|
|
|
{ 109, 365, -366, -110}, { 114, 382, -383, -115},
|
|
|
|
|
{ 119, 399, -400, -120}, { 124, 416, -417, -125},
|
|
|
|
|
{ 130, 434, -435, -131}, { 136, 454, -455, -137},
|
|
|
|
|
{ 142, 475, -476, -143}, { 148, 495, -496, -149},
|
|
|
|
|
{ 155, 519, -520, -156}, { 162, 541, -542, -163},
|
|
|
|
|
{ 169, 564, -565, -170}, { 176, 590, -591, -177},
|
|
|
|
|
{ 185, 617, -618, -186}, { 193, 644, -645, -194},
|
|
|
|
|
{ 201, 673, -674, -202}, { 210, 703, -704, -211},
|
|
|
|
|
{ 220, 735, -736, -221}, { 230, 767, -768, -231},
|
|
|
|
|
{ 240, 801, -802, -241}, { 251, 838, -839, -252},
|
|
|
|
|
{ 262, 876, -877, -263}, { 274, 914, -915, -275},
|
|
|
|
|
{ 286, 955, -956, -287}, { 299, 997, -998, -300},
|
|
|
|
|
{ 312, 1041, -1042, -313}, { 326, 1089, -1090, -327},
|
|
|
|
|
{ 341, 1138, -1139, -342}, { 356, 1188, -1189, -357},
|
|
|
|
|
{ 372, 1241, -1242, -373}, { 388, 1297, -1298, -389},
|
|
|
|
|
{ 406, 1354, -1355, -407}, { 424, 1415, -1416, -425},
|
|
|
|
|
{ 443, 1478, -1479, -444}, { 462, 1544, -1545, -463},
|
|
|
|
|
{ 483, 1613, -1614, -484}, { 505, 1684, -1685, -506},
|
|
|
|
|
{ 527, 1760, -1761, -528}, { 551, 1838, -1839, -552},
|
|
|
|
|
{ 576, 1921, -1922, -577}, { 601, 2007, -2008, -602},
|
|
|
|
|
{ 628, 2097, -2098, -629}, { 656, 2190, -2191, -657},
|
|
|
|
|
{ 686, 2288, -2289, -687}, { 716, 2389, -2390, -717},
|
|
|
|
|
{ 748, 2496, -2497, -749}, { 781, 2607, -2608, -782},
|
|
|
|
|
{ 816, 2724, -2725, -817}, { 853, 2846, -2847, -854},
|
|
|
|
|
{ 891, 2973, -2974, -892}, { 930, 3104, -3105, -931},
|
|
|
|
|
{ 972, 3243, -3244, -973}, { 1016, 3389, -3390, -1017},
|
|
|
|
|
{ 1061, 3539, -3540, -1062}, { 1108, 3698, -3699, -1109},
|
|
|
|
|
{ 1158, 3862, -3863, -1159}, { 1209, 4035, -4036, -1210},
|
|
|
|
|
{ 1264, 4216, -4217, -1265}, { 1320, 4403, -4404, -1321},
|
|
|
|
|
{ 1379, 4599, -4600, -1380}, { 1441, 4806, -4807, -1442},
|
|
|
|
|
{ 1505, 5019, -5020, -1506}, { 1572, 5244, -5245, -1573},
|
|
|
|
|
{ 1642, 5477, -5478, -1643}, { 1715, 5722, -5723, -1716},
|
|
|
|
|
{ 1792, 5978, -5979, -1793}, { 1872, 6245, -6246, -1873},
|
|
|
|
|
{ 1955, 6522, -6523, -1956}, { 2043, 6813, -6814, -2044},
|
|
|
|
|
{ 2134, 7118, -7119, -2135}, { 2229, 7436, -7437, -2230},
|
|
|
|
|
{ 2329, 7767, -7768, -2330}, { 2432, 8114, -8115, -2433},
|
|
|
|
|
{ 2541, 8477, -8478, -2542}, { 2655, 8854, -8855, -2656},
|
|
|
|
|
{ 2773, 9250, -9251, -2774}, { 2897, 9663, -9664, -2898},
|
|
|
|
|
{ 3026, 10094, -10095, -3027}, { 3162, 10546, -10547, -3163},
|
|
|
|
|
{ 3303, 11016, -11017, -3304}, { 3450, 11508, -11509, -3451},
|
|
|
|
|
{ 3604, 12020, -12021, -3605}, { 3765, 12556, -12557, -3766},
|
|
|
|
|
{ 3933, 13118, -13119, -3934}, { 4108, 13703, -13704, -4109},
|
|
|
|
|
{ 4292, 14315, -14316, -4293}, { 4483, 14953, -14954, -4484},
|
|
|
|
|
{ 4683, 15621, -15622, -4684}, { 4892, 16318, -16319, -4893},
|
|
|
|
|
{ 5111, 17046, -17047, -5112}, { 5339, 17807, -17808, -5340},
|
|
|
|
|
{ 5577, 18602, -18603, -5578}, { 5826, 19433, -19434, -5827},
|
|
|
|
|
{ 6086, 20300, -20301, -6087}, { 6358, 21205, -21206, -6359},
|
|
|
|
|
{ 6642, 22152, -22153, -6643}, { 6938, 23141, -23142, -6939},
|
|
|
|
|
{ 7248, 24173, -24174, -7249}, { 7571, 25252, -25253, -7572},
|
|
|
|
|
{ 7909, 26380, -26381, -7910}, { 8262, 27557, -27558, -8263},
|
|
|
|
|
{ 8631, 28786, -28787, -8632}, { 9016, 30072, -30073, -9017},
|
|
|
|
|
{ 9419, 31413, -31414, -9420}, { 9839, 32767, -32768, -9840},
|
|
|
|
|
{ 10278, 32767, -32768, -10279}, { 10737, 32767, -32768, -10738},
|
|
|
|
|
{ 11216, 32767, -32768, -11217}, { 11717, 32767, -32768, -11718},
|
|
|
|
|
{ 12240, 32767, -32768, -12241}, { 12786, 32767, -32768, -12787},
|
|
|
|
|
{ 13356, 32767, -32768, -13357}, { 13953, 32767, -32768, -13954},
|
|
|
|
|
{ 14576, 32767, -32768, -14577}, { 15226, 32767, -32768, -15227},
|
|
|
|
|
{ 15906, 32767, -32768, -15907}, { 16615, 32767, -32768, -16616}
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
#define QT_8S_2_16S(x) (((x) & 0xFF00) | (((x) >> 8) & 0xFF))
|
|
|
|
|
|
|
|
|
|
typedef struct ChannelData {
|
|
|
|
|
int16_t index, lev, factor, prev2, previous, level;
|
|
|
|
|
} ChannelData;
|
|
|
|
|
|
|
|
|
|
typedef struct MACEContext {
|
|
|
|
|
ChannelData chd[2];
|
|
|
|
|
} MACEContext;
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* MACE version of av_clip_int16(). We have to do this to keep binary
|
|
|
|
|
* identical output to the binary decoder.
|
|
|
|
|
*/
|
|
|
|
|
static inline int16_t mace_broken_clip_int16(int n)
|
|
|
|
|
{
|
|
|
|
|
if (n > 32767)
|
|
|
|
|
return 32767;
|
|
|
|
|
else if (n < -32768)
|
|
|
|
|
return -32767;
|
|
|
|
|
else
|
|
|
|
|
return n;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void chomp3(ChannelData *ctx, int16_t *output, uint8_t val,
|
|
|
|
|
const uint16_t tab1[],
|
|
|
|
|
const int16_t *tab2, int tab2_stride,
|
|
|
|
|
uint32_t numChannels)
|
|
|
|
|
{
|
|
|
|
|
int16_t current;
|
|
|
|
|
|
|
|
|
|
current = tab2[((ctx->index & 0x7f0) >> 4)*tab2_stride + val];
|
|
|
|
|
|
|
|
|
|
current = mace_broken_clip_int16(current + ctx->lev);
|
|
|
|
|
|
|
|
|
|
ctx->lev = current - (current >> 3);
|
|
|
|
|
*output = QT_8S_2_16S(current);
|
|
|
|
|
if (( ctx->index += tab1[val]-(ctx->index >> 5) ) < 0)
|
|
|
|
|
ctx->index = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void chomp6(ChannelData *ctx, int16_t *output, uint8_t val,
|
|
|
|
|
const uint16_t tab1[],
|
|
|
|
|
const int16_t *tab2, int tab2_stride,
|
|
|
|
|
uint32_t numChannels)
|
|
|
|
|
{
|
|
|
|
|
int16_t current;
|
|
|
|
|
|
|
|
|
|
current = tab2[((ctx->index & 0x7f0) >> 4)*tab2_stride + val];
|
|
|
|
|
|
|
|
|
|
if ((ctx->previous ^ current) >= 0) {
|
|
|
|
|
ctx->factor = FFMIN(ctx->factor + 506, 32767);
|
|
|
|
|
} else {
|
|
|
|
|
if (ctx->factor - 314 < -32768)
|
|
|
|
|
ctx->factor = -32767;
|
|
|
|
|
else
|
|
|
|
|
ctx->factor -= 314;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
current = mace_broken_clip_int16(current + ctx->level);
|
|
|
|
|
|
|
|
|
|
ctx->level = ((current*ctx->factor) >> 15);
|
|
|
|
|
current >>= 1;
|
|
|
|
|
|
|
|
|
|
output[0] = QT_8S_2_16S(ctx->previous + ctx->prev2 -
|
|
|
|
|
((ctx->prev2-current) >> 2));
|
|
|
|
|
output[numChannels] = QT_8S_2_16S(ctx->previous + current +
|
|
|
|
|
((ctx->prev2-current) >> 2));
|
|
|
|
|
ctx->prev2 = ctx->previous;
|
|
|
|
|
ctx->previous = current;
|
|
|
|
|
|
|
|
|
|
if ((ctx->index += tab1[val] - (ctx->index >> 5)) < 0)
|
|
|
|
|
ctx->index = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static av_cold int mace_decode_init(AVCodecContext * avctx)
|
|
|
|
|
{
|
|
|
|
|
if (avctx->channels > 2)
|
|
|
|
|
return -1;
|
|
|
|
|
avctx->sample_fmt = SAMPLE_FMT_S16;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int mace3_decode_frame(AVCodecContext *avctx,
|
|
|
|
|
void *data, int *data_size,
|
|
|
|
|
const uint8_t *buf, int buf_size)
|
|
|
|
|
{
|
|
|
|
|
int16_t *samples = data;
|
|
|
|
|
MACEContext *ctx = avctx->priv_data;
|
|
|
|
|
int i, j, k;
|
|
|
|
|
|
|
|
|
|
for(i = 0; i < avctx->channels; i++) {
|
|
|
|
|
int16_t *output = samples + i;
|
|
|
|
|
|
|
|
|
|
for (j=0; j < buf_size / 2 / avctx->channels; j++)
|
|
|
|
|
for (k=0; k < 2; k++) {
|
|
|
|
|
uint8_t pkt = buf[i*2 + j*2*avctx->channels + k];
|
|
|
|
|
chomp3(&ctx->chd[i], output, pkt &7, MACEtab1, MACEtab2,
|
|
|
|
|
8, avctx->channels);
|
|
|
|
|
output += avctx->channels;
|
|
|
|
|
chomp3(&ctx->chd[i], output,(pkt >> 3) &3, MACEtab3, MACEtab4,
|
|
|
|
|
4, avctx->channels);
|
|
|
|
|
output += avctx->channels;
|
|
|
|
|
chomp3(&ctx->chd[i], output, pkt >> 5 , MACEtab1, MACEtab2,
|
|
|
|
|
8, avctx->channels);
|
|
|
|
|
output += avctx->channels;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
*data_size = 2 * 3 * buf_size;
|
|
|
|
|
|
|
|
|
|
return buf_size;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int mace6_decode_frame(AVCodecContext *avctx,
|
|
|
|
|
void *data, int *data_size,
|
|
|
|
|
const uint8_t *buf, int buf_size)
|
|
|
|
|
{
|
|
|
|
|
int16_t *samples = data;
|
|
|
|
|
MACEContext *ctx = avctx->priv_data;
|
|
|
|
|
int i, j;
|
|
|
|
|
|
|
|
|
|
for(i = 0; i < avctx->channels; i++) {
|
|
|
|
|
int16_t *output = samples + i;
|
|
|
|
|
|
|
|
|
|
for (j = 0; j < buf_size / avctx->channels; j++) {
|
|
|
|
|
uint8_t pkt = buf[i + j*avctx->channels];
|
|
|
|
|
|
|
|
|
|
chomp6(&ctx->chd[i], output, pkt >> 5 , MACEtab1, MACEtab2,
|
|
|
|
|
8, avctx->channels);
|
|
|
|
|
output += avctx->channels << 1;
|
|
|
|
|
chomp6(&ctx->chd[i], output,(pkt >> 3) & 3, MACEtab3, MACEtab4,
|
|
|
|
|
4, avctx->channels);
|
|
|
|
|
output += avctx->channels << 1;
|
|
|
|
|
chomp6(&ctx->chd[i], output, pkt & 7, MACEtab1, MACEtab2,
|
|
|
|
|
8, avctx->channels);
|
|
|
|
|
output += avctx->channels << 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
*data_size = 2 * 6 * buf_size;
|
|
|
|
|
|
|
|
|
|
return buf_size;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
AVCodec mace3_decoder = {
|
|
|
|
|
"mace3",
|
|
|
|
|
CODEC_TYPE_AUDIO,
|
|
|
|
|
CODEC_ID_MACE3,
|
|
|
|
|
sizeof(MACEContext),
|
|
|
|
|
mace_decode_init,
|
|
|
|
|
NULL,
|
|
|
|
|
NULL,
|
|
|
|
|
mace3_decode_frame,
|
|
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("MACE (Macintosh Audio Compression/Expansion) 3:1"),
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
AVCodec mace6_decoder = {
|
|
|
|
|
"mace6",
|
|
|
|
|
CODEC_TYPE_AUDIO,
|
|
|
|
|
CODEC_ID_MACE6,
|
|
|
|
|
sizeof(MACEContext),
|
|
|
|
|
mace_decode_init,
|
|
|
|
|
NULL,
|
|
|
|
|
NULL,
|
|
|
|
|
mace6_decode_frame,
|
|
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("MACE (Macintosh Audio Compression/Expansion) 6:1"),
|
|
|
|
|
};
|
|
|
|
|
|
