/* ScummVM - Graphic Adventure Engine * * ScummVM is the legal property of its developers, whose names * are too numerous to list here. Please refer to the COPYRIGHT * file distributed with this source distribution. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * */ // Based on the Xentax Wiki documentation: // http://wiki.xentax.com/index.php/The_Last_Express_SND #include "lastexpress/data/snd.h" #include "lastexpress/debug.h" #include "audio/decoders/adpcm_intern.h" #include "common/debug.h" #include "common/memstream.h" #include "common/system.h" namespace LastExpress { #pragma region Sound filters tables static const int stepTable[1424] = { 0, 0, 0, 0, 128, 256, 384, 512, 0, 0, 0, 0, 128, 256, 384, 512, 0, 0, 0, 0, 192, 320, 448, 576, 0, 0, 0, 0, 192, 320, 448, 576, 64, 64, 64, 64, 256, 384, 512, 640, 64, 64, 64, 64, 256, 384, 512, 640, 128, 128, 128, 128, 320, 448, 576, 704, 128, 128, 128, 128, 320, 448, 576, 704, 192, 192, 192, 192, 384, 512, 640, 768, 192, 192, 192, 192, 384, 512, 640, 768, 256, 256, 256, 256, 448, 576, 704, 832, 256, 256, 256, 256, 448, 576, 704, 832, 320, 320, 320, 320, 512, 640, 768, 896, 320, 320, 320, 320, 512, 640, 768, 896, 384, 384, 384, 384, 576, 704, 832, 960, 384, 384, 384, 384, 576, 704, 832, 960, 448, 448, 448, 448, 640, 768, 896, 1024, 448, 448, 448, 448, 640, 768, 896, 1024, 512, 512, 512, 512, 704, 832, 960, 1088, 512, 512, 512, 512, 704, 832, 960, 1088, 576, 576, 576, 576, 768, 896, 1024, 1152, 576, 576, 576, 576, 768, 896, 1024, 1152, 640, 640, 640, 640, 832, 960, 1088, 1216, 640, 640, 640, 640, 832, 960, 1088, 1216, 704, 704, 704, 704, 896, 1024, 1152, 1280, 704, 704, 704, 704, 896, 1024, 1152, 1280, 768, 768, 768, 768, 960, 1088, 1216, 1344, 768, 768, 768, 768, 960, 1088, 1216, 1344, 832, 832, 832, 832, 1024, 1152, 1280, 1408, 832, 832, 832, 832, 1024, 1152, 1280, 1408, 896, 896, 896, 896, 1088, 1216, 1344, 1472, 896, 896, 896, 896, 1088, 1216, 1344, 1472, 960, 960, 960, 960, 1152, 1280, 1408, 1536, 960, 960, 960, 960, 1152, 1280, 1408, 1536, 1024, 1024, 1024, 1024, 1216, 1344, 1472, 1600, 1024, 1024, 1024, 1024, 1216, 1344, 1472, 1600, 1088, 1088, 1088, 1088, 1280, 1408, 1536, 1664, 1088, 1088, 1088, 1088, 1280, 1408, 1536, 1664, 1152, 1152, 1152, 1152, 1344, 1472, 1600, 1728, 1152, 1152, 1152, 1152, 1344, 1472, 1600, 1728, 1216, 1216, 1216, 1216, 1408, 1536, 1664, 1792, 1216, 1216, 1216, 1216, 1408, 1536, 1664, 1792, 1280, 1280, 1280, 1280, 1472, 1600, 1728, 1856, 1280, 1280, 1280, 1280, 1472, 1600, 1728, 1856, 1344, 1344, 1344, 1344, 1536, 1664, 1792, 1920, 1344, 1344, 1344, 1344, 1536, 1664, 1792, 1920, 1408, 1408, 1408, 1408, 1600, 1728, 1856, 1984, 1408, 1408, 1408, 1408, 1600, 1728, 1856, 1984, 1472, 1472, 1472, 1472, 1664, 1792, 1920, 2048, 1472, 1472, 1472, 1472, 1664, 1792, 1920, 2048, 1536, 1536, 1536, 1536, 1728, 1856, 1984, 2112, 1536, 1536, 1536, 1536, 1728, 1856, 1984, 2112, 1600, 1600, 1600, 1600, 1792, 1920, 2048, 2176, 1600, 1600, 1600, 1600, 1792, 1920, 2048, 2176, 1664, 1664, 1664, 1664, 1856, 1984, 2112, 2240, 1664, 1664, 1664, 1664, 1856, 1984, 2112, 2240, 1728, 1728, 1728, 1728, 1920, 2048, 2176, 2304, 1728, 1728, 1728, 1728, 1920, 2048, 2176, 2304, 1792, 1792, 1792, 1792, 1984, 2112, 2240, 2368, 1792, 1792, 1792, 1792, 1984, 2112, 2240, 2368, 1856, 1856, 1856, 1856, 2048, 2176, 2304, 2432, 1856, 1856, 1856, 1856, 2048, 2176, 2304, 2432, 1920, 1920, 1920, 1920, 2112, 2240, 2368, 2496, 1920, 1920, 1920, 1920, 2112, 2240, 2368, 2496, 1984, 1984, 1984, 1984, 2176, 2304, 2432, 2560, 1984, 1984, 1984, 1984, 2176, 2304, 2432, 2560, 2048, 2048, 2048, 2048, 2240, 2368, 2496, 2624, 2048, 2048, 2048, 2048, 2240, 2368, 2496, 2624, 2112, 2112, 2112, 2112, 2304, 2432, 2560, 2688, 2112, 2112, 2112, 2112, 2304, 2432, 2560, 2688, 2176, 2176, 2176, 2176, 2368, 2496, 2624, 2752, 2176, 2176, 2176, 2176, 2368, 2496, 2624, 2752, 2240, 2240, 2240, 2240, 2432, 2560, 2688, 2816, 2240, 2240, 2240, 2240, 2432, 2560, 2688, 2816, 2304, 2304, 2304, 2304, 2496, 2624, 2752, 2880, 2304, 2304, 2304, 2304, 2496, 2624, 2752, 2880, 2368, 2368, 2368, 2368, 2560, 2688, 2816, 2944, 2368, 2368, 2368, 2368, 2560, 2688, 2816, 2944, 2432, 2432, 2432, 2432, 2624, 2752, 2880, 3008, 2432, 2432, 2432, 2432, 2624, 2752, 2880, 3008, 2496, 2496, 2496, 2496, 2688, 2816, 2944, 3072, 2496, 2496, 2496, 2496, 2688, 2816, 2944, 3072, 2560, 2560, 2560, 2560, 2752, 2880, 3008, 3136, 2560, 2560, 2560, 2560, 2752, 2880, 3008, 3136, 2624, 2624, 2624, 2624, 2816, 2944, 3072, 3200, 2624, 2624, 2624, 2624, 2816, 2944, 3072, 3200, 2688, 2688, 2688, 2688, 2880, 3008, 3136, 3264, 2688, 2688, 2688, 2688, 2880, 3008, 3136, 3264, 2752, 2752, 2752, 2752, 2944, 3072, 3200, 3328, 2752, 2752, 2752, 2752, 2944, 3072, 3200, 3328, 2816, 2816, 2816, 2816, 3008, 3136, 3264, 3392, 2816, 2816, 2816, 2816, 3008, 3136, 3264, 3392, 2880, 2880, 2880, 2880, 3072, 3200, 3328, 3456, 2880, 2880, 2880, 2880, 3072, 3200, 3328, 3456, 2944, 2944, 2944, 2944, 3136, 3264, 3392, 3520, 2944, 2944, 2944, 2944, 3136, 3264, 3392, 3520, 3008, 3008, 3008, 3008, 3200, 3328, 3456, 3584, 3008, 3008, 3008, 3008, 3200, 3328, 3456, 3584, 3072, 3072, 3072, 3072, 3264, 3392, 3520, 3648, 3072, 3072, 3072, 3072, 3264, 3392, 3520, 3648, 3136, 3136, 3136, 3136, 3328, 3456, 3584, 3712, 3136, 3136, 3136, 3136, 3328, 3456, 3584, 3712, 3200, 3200, 3200, 3200, 3392, 3520, 3648, 3776, 3200, 3200, 3200, 3200, 3392, 3520, 3648, 3776, 3264, 3264, 3264, 3264, 3456, 3584, 3712, 3840, 3264, 3264, 3264, 3264, 3456, 3584, 3712, 3840, 3328, 3328, 3328, 3328, 3520, 3648, 3776, 3904, 3328, 3328, 3328, 3328, 3520, 3648, 3776, 3904, 3392, 3392, 3392, 3392, 3584, 3712, 3840, 3968, 3392, 3392, 3392, 3392, 3584, 3712, 3840, 3968, 3456, 3456, 3456, 3456, 3648, 3776, 3904, 4032, 3456, 3456, 3456, 3456, 3648, 3776, 3904, 4032, 3520, 3520, 3520, 3520, 3712, 3840, 3968, 4096, 3520, 3520, 3520, 3520, 3712, 3840, 3968, 4096, 3584, 3584, 3584, 3584, 3776, 3904, 4032, 4160, 3584, 3584, 3584, 3584, 3776, 3904, 4032, 4160, 3648, 3648, 3648, 3648, 3840, 3968, 4096, 4224, 3648, 3648, 3648, 3648, 3840, 3968, 4096, 4224, 3712, 3712, 3712, 3712, 3904, 4032, 4160, 4288, 3712, 3712, 3712, 3712, 3904, 4032, 4160, 4288, 3776, 3776, 3776, 3776, 3968, 4096, 4224, 4352, 3776, 3776, 3776, 3776, 3968, 4096, 4224, 4352, 3840, 3840, 3840, 3840, 4032, 4160, 4288, 4416, 3840, 3840, 3840, 3840, 4032, 4160, 4288, 4416, 3904, 3904, 3904, 3904, 4096, 4224, 4352, 4480, 3904, 3904, 3904, 3904, 4096, 4224, 4352, 4480, 3968, 3968, 3968, 3968, 4160, 4288, 4416, 4544, 3968, 3968, 3968, 3968, 4160, 4288, 4416, 4544, 4032, 4032, 4032, 4032, 4224, 4352, 4480, 4608, 4032, 4032, 4032, 4032, 4224, 4352, 4480, 4608, 4096, 4096, 4096, 4096, 4288, 4416, 4544, 4672, 4096, 4096, 4096, 4096, 4288, 4416, 4544, 4672, 4160, 4160, 4160, 4160, 4352, 4480, 4608, 4736, 4160, 4160, 4160, 4160, 4352, 4480, 4608, 4736, 4224, 4224, 4224, 4224, 4416, 4544, 4672, 4800, 4224, 4224, 4224, 4224, 4416, 4544, 4672, 4800, 4288, 4288, 4288, 4288, 4480, 4608, 4736, 4864, 4288, 4288, 4288, 4288, 4480, 4608, 4736, 4864, 4352, 4352, 4352, 4352, 4544, 4672, 4800, 4928, 4352, 4352, 4352, 4352, 4544, 4672, 4800, 4928, 4416, 4416, 4416, 4416, 4608, 4736, 4864, 4992, 4416, 4416, 4416, 4416, 4608, 4736, 4864, 4992, 4480, 4480, 4480, 4480, 4672, 4800, 4928, 5056, 4480, 4480, 4480, 4480, 4672, 4800, 4928, 5056, 4544, 4544, 4544, 4544, 4736, 4864, 4992, 5120, 4544, 4544, 4544, 4544, 4736, 4864, 4992, 5120, 4608, 4608, 4608, 4608, 4800, 4928, 5056, 5184, 4608, 4608, 4608, 4608, 4800, 4928, 5056, 5184, 4672, 4672, 4672, 4672, 4864, 4992, 5120, 5248, 4672, 4672, 4672, 4672, 4864, 4992, 5120, 5248, 4736, 4736, 4736, 4736, 4928, 5056, 5184, 5312, 4736, 4736, 4736, 4736, 4928, 5056, 5184, 5312, 4800, 4800, 4800, 4800, 4992, 5120, 5248, 5376, 4800, 4800, 4800, 4800, 4992, 5120, 5248, 5376, 4864, 4864, 4864, 4864, 5056, 5184, 5312, 5440, 4864, 4864, 4864, 4864, 5056, 5184, 5312, 5440, 4928, 4928, 4928, 4928, 5120, 5248, 5376, 5504, 4928, 4928, 4928, 4928, 5120, 5248, 5376, 5504, 4992, 4992, 4992, 4992, 5184, 5312, 5440, 5568, 4992, 4992, 4992, 4992, 5184, 5312, 5440, 5568, 5056, 5056, 5056, 5056, 5248, 5376, 5504, 5632, 5056, 5056, 5056, 5056, 5248, 5376, 5504, 5632, 5120, 5120, 5120, 5120, 5312, 5440, 5568, 5632, 5120, 5120, 5120, 5120, 5312, 5440, 5568, 5632, 5184, 5184, 5184, 5184, 5376, 5504, 5632, 5632, 5184, 5184, 5184, 5184, 5376, 5504, 5632, 5632, 5248, 5248, 5248, 5248, 5440, 5568, 5632, 5632, 5248, 5248, 5248, 5248, 5440, 5568, 5632, 5632, 5312, 5312, 5312, 5312, 5504, 5632, 5632, 5632, 5312, 5312, 5312, 5312, 5504, 5632, 5632, 5632, 5376, 5376, 5376, 5376, 5568, 5632, 5632, 5632, 5376, 5376, 5376, 5376, 5568, 5632, 5632, 5632, 5440, 5440, 5440, 5440, 5632, 5632, 5632, 5632, 5440, 5440, 5440, 5440, 5632, 5632, 5632, 5632, 5504, 5504, 5504, 5504, 5632, 5632, 5632, 5632, 5504, 5504, 5504, 5504, 5632, 5632, 5632, 5632, 5568, 5568, 5568, 5568, 5632, 5632, 5632, 5632, 5568, 5568, 5568, 5568, 5632, 5632, 5632, 5632 }; static const int imaTable[1424] = { 0, 2, 4, 6, 7, 9, 11, 13, 0, -2, -4, -6, -7, -9, -11, -13, 1, 3, 5, 7, 9, 11, 13, 15, -1, -3, -5, -7, -9, -11, -13, -15, 1, 3, 5, 7, 10, 12, 14, 16, -1, -3, -5, -7, -10, -12, -14, -16, 1, 3, 6, 8, 11, 13, 16, 18, -1, -3, -6, -8, -11, -13, -16, -18, 1, 4, 6, 9, 12, 15, 17, 20, -1, -4, -6, -9, -12, -15, -17, -20, 1, 4, 7, 10, 13, 16, 19, 22, -1, -4, -7, -10, -13, -16, -19, -22, 1, 4, 8, 11, 14, 17, 21, 24, -1, -4, -8, -11, -14, -17, -21, -24, 1, 5, 8, 12, 15, 19, 22, 26, -1, -5, -8, -12, -15, -19, -22, -26, 2, 6, 10, 14, 18, 22, 26, 30, -2, -6, -10, -14, -18, -22, -26, -30, 2, 6, 10, 14, 19, 23, 27, 31, -2, -6, -10, -14, -19, -23, -27, -31, 2, 7, 11, 16, 21, 26, 30, 35, -2, -7, -11, -16, -21, -26, -30, -35, 2, 7, 13, 18, 23, 28, 34, 39, -2, -7, -13, -18, -23, -28, -34, -39, 2, 8, 14, 20, 25, 31, 37, 43, -2, -8, -14, -20, -25, -31, -37, -43, 3, 9, 15, 21, 28, 34, 40, 46, -3, -9, -15, -21, -28, -34, -40, -46, 3, 10, 17, 24, 31, 38, 45, 52, -3, -10, -17, -24, -31, -38, -45, -52, 3, 11, 19, 27, 34, 42, 50, 58, -3, -11, -19, -27, -34, -42, -50, -58, 4, 12, 21, 29, 38, 46, 55, 63, -4, -12, -21, -29, -38, -46, -55, -63, 4, 13, 23, 32, 41, 50, 60, 69, -4, -13, -23, -32, -41, -50, -60, -69, 5, 15, 25, 35, 46, 56, 66, 76, -5, -15, -25, -35, -46, -56, -66, -76, 5, 16, 28, 39, 50, 61, 73, 84, -5, -16, -28, -39, -50, -61, -73, -84, 6, 18, 31, 43, 56, 68, 81, 93, -6, -18, -31, -43, -56, -68, -81, -93, 6, 20, 34, 48, 61, 75, 89, 103, -6, -20, -34, -48, -61, -75, -89, -103, 7, 22, 37, 52, 67, 82, 97, 112, -7, -22, -37, -52, -67, -82, -97, -112, 8, 24, 41, 57, 74, 90, 107, 123, -8, -24, -41, -57, -74, -90, -107, -123, 9, 27, 45, 63, 82, 100, 118, 136, -9, -27, -45, -63, -82, -100, -118, -136, 10, 30, 50, 70, 90, 110, 130, 150, -10, -30, -50, -70, -90, -110, -130, -150, 11, 33, 55, 77, 99, 121, 143, 165, -11, -33, -55, -77, -99, -121, -143, -165, 12, 36, 60, 84, 109, 133, 157, 181, -12, -36, -60, -84, -109, -133, -157, -181, 13, 40, 66, 93, 120, 147, 173, 200, -13, -40, -66, -93, -120, -147, -173, -200, 14, 44, 73, 103, 132, 162, 191, 221, -14, -44, -73, -103, -132, -162, -191, -221, 16, 48, 81, 113, 146, 178, 211, 243, -16, -48, -81, -113, -146, -178, -211, -243, 17, 53, 89, 125, 160, 196, 232, 268, -17, -53, -89, -125, -160, -196, -232, -268, 19, 58, 98, 137, 176, 215, 255, 294, -19, -58, -98, -137, -176, -215, -255, -294, 21, 64, 108, 151, 194, 237, 281, 324, -21, -64, -108, -151, -194, -237, -281, -324, 23, 71, 118, 166, 213, 261, 308, 356, -23, -71, -118, -166, -213, -261, -308, -356, 26, 78, 130, 182, 235, 287, 339, 391, -26, -78, -130, -182, -235, -287, -339, -391, 28, 86, 143, 201, 258, 316, 373, 431, -28, -86, -143, -201, -258, -316, -373, -431, 31, 94, 158, 221, 284, 347, 411, 474, -31, -94, -158, -221, -284, -347, -411, -474, 34, 104, 174, 244, 313, 383, 453, 523, -34, -104, -174, -244, -313, -383, -453, -523, 38, 115, 191, 268, 345, 422, 498, 575, -38, -115, -191, -268, -345, -422, -498, -575, 42, 126, 210, 294, 379, 463, 547, 631, -42, -126, -210, -294, -379, -463, -547, -631, 46, 139, 231, 324, 417, 510, 602, 695, -46, -139, -231, -324, -417, -510, -602, -695, 51, 153, 255, 357, 459, 561, 663, 765, -51, -153, -255, -357, -459, -561, -663, -765, 56, 168, 280, 392, 505, 617, 729, 841, -56, -168, -280, -392, -505, -617, -729, -841, 61, 185, 308, 432, 555, 679, 802, 926, -61, -185, -308, -432, -555, -679, -802, -926, 68, 204, 340, 476, 612, 748, 884, 1020, -68, -204, -340, -476, -612, -748, -884, -1020, 74, 224, 373, 523, 672, 822, 971, 1121, -74, -224, -373, -523, -672, -822, -971, -1121, 82, 246, 411, 575, 740, 904, 1069, 1233, -82, -246, -411, -575, -740, -904, -1069, -1233, 90, 271, 452, 633, 814, 995, 1176, 1357, -90, -271, -452, -633, -814, -995, -1176, -1357, 99, 298, 497, 696, 895, 1094, 1293, 1492, -99, -298, -497, -696, -895, -1094, -1293, -1492, 109, 328, 547, 766, 985, 1204, 1423, 1642, -109, -328, -547, -766, -985, -1204, -1423, -1642, 120, 361, 601, 842, 1083, 1324, 1564, 1805, -120, -361, -601, -842, -1083, -1324, -1564, -1805, 132, 397, 662, 927, 1192, 1457, 1722, 1987, -132, -397, -662, -927, -1192, -1457, -1722, -1987, 145, 437, 728, 1020, 1311, 1603, 1894, 2186, -145, -437, -728, -1020, -1311, -1603, -1894, -2186, 160, 480, 801, 1121, 1442, 1762, 2083, 2403, -160, -480, -801, -1121, -1442, -1762, -2083, -2403, 176, 529, 881, 1234, 1587, 1940, 2292, 2645, -176, -529, -881, -1234, -1587, -1940, -2292, -2645, 194, 582, 970, 1358, 1746, 2134, 2522, 2910, -194, -582, -970, -1358, -1746, -2134, -2522, -2910, 213, 640, 1066, 1493, 1920, 2347, 2773, 3200, -213, -640, -1066, -1493, -1920, -2347, -2773, -3200, 234, 704, 1173, 1643, 2112, 2582, 3051, 3521, -234, -704, -1173, -1643, -2112, -2582, -3051, -3521, 258, 774, 1291, 1807, 2324, 2840, 3357, 3873, -258, -774, -1291, -1807, -2324, -2840, -3357, -3873, 284, 852, 1420, 1988, 2556, 3124, 3692, 4260, -284, -852, -1420, -1988, -2556, -3124, -3692, -4260, 312, 937, 1561, 2186, 2811, 3436, 4060, 4685, -312, -937, -1561, -2186, -2811, -3436, -4060, -4685, 343, 1030, 1718, 2405, 3092, 3779, 4467, 5154, -343, -1030, -1718, -2405, -3092, -3779, -4467, -5154, 378, 1134, 1890, 2646, 3402, 4158, 4914, 5670, -378, -1134, -1890, -2646, -3402, -4158, -4914, -5670, 415, 1247, 2079, 2911, 3742, 4574, 5406, 6238, -415, -1247, -2079, -2911, -3742, -4574, -5406, -6238, 457, 1372, 2287, 3202, 4117, 5032, 5947, 6862, -457, -1372, -2287, -3202, -4117, -5032, -5947, -6862, 503, 1509, 2516, 3522, 4529, 5535, 6542, 7548, -503, -1509, -2516, -3522, -4529, -5535, -6542, -7548, 553, 1660, 2767, 3874, 4981, 6088, 7195, 8302, -553, -1660, -2767, -3874, -4981, -6088, -7195, -8302, 608, 1826, 3044, 4262, 5479, 6697, 7915, 9133, -608, -1826, -3044, -4262, -5479, -6697, -7915, -9133, 669, 2009, 3348, 4688, 6027, 7367, 8706, 10046, -669, -2009, -3348, -4688, -6027, -7367, -8706, -10046, 736, 2210, 3683, 5157, 6630, 8104, 9577, 11051, -736, -2210, -3683, -5157, -6630, -8104, -9577, -11051, 810, 2431, 4052, 5673, 7294, 8915, 10536, 12157, -810, -2431, -4052, -5673, -7294, -8915, -10536, -12157, 891, 2674, 4457, 6240, 8023, 9806, 11589, 13372, -891, -2674, -4457, -6240, -8023, -9806, -11589, -13372, 980, 2941, 4903, 6864, 8825, 10786, 12748, 14709, -980, -2941, -4903, -6864, -8825, -10786, -12748, -14709, 1078, 3236, 5393, 7551, 9708, 11866, 14023, 16181, -1078, -3236, -5393, -7551, -9708, -11866, -14023, -16181, 1186, 3559, 5933, 8306, 10679, 13052, 15426, 17799, -1186, -3559, -5933, -8306, -10679, -13052, -15426, -17799, 1305, 3915, 6526, 9136, 11747, 14357, 16968, 19578, -1305, -3915, -6526, -9136, -11747, -14357, -16968, -19578, 1435, 4307, 7179, 10051, 12922, 15794, 18666, 21538, -1435, -4307, -7179, -10051, -12922, -15794, -18666, -21538, 1579, 4738, 7896, 11055, 14214, 17373, 20531, 23690, -1579, -4738, -7896, -11055, -14214, -17373, -20531, -23690, 1737, 5212, 8686, 12161, 15636, 19111, 22585, 26060, -1737, -5212, -8686, -12161, -15636, -19111, -22585, -26060, 1911, 5733, 9555, 13377, 17200, 21022, 24844, 28666, -1911, -5733, -9555, -13377, -17200, -21022, -24844, -28666, 2102, 6306, 10511, 14715, 18920, 23124, 27329, 31533, -2102, -6306, -10511, -14715, -18920, -23124, -27329, -31533, 2312, 6937, 11562, 16187, 20812, 25437, 30062, 32767, -2312, -6937, -11562, -16187, -20812, -25437, -30062, -32767, 2543, 7631, 12718, 17806, 22893, 27981, 32767, 32767, -2543, -7631, -12718, -17806, -22893, -27981, -32767, -32767, 2798, 8394, 13990, 19586, 25183, 30779, 32767, 32767, -2798, -8394, -13990, -19586, -25183, -30779, -32767, -32767, 3077, 9233, 15389, 21545, 27700, 32767, 32767, 32767, -3077, -9233, -15389, -21545, -27700, -32767, -32767, -32767, 3385, 10157, 16928, 23700, 30471, 32767, 32767, 32767, -3385, -10157, -16928, -23700, -30471, -32767, -32767, -32767, 3724, 11172, 18621, 26069, 32767, 32767, 32767, 32767, -3724, -11172, -18621, -26069, -32767, -32767, -32767, -32767, 4095, 12287, 20479, 28671, 32767, 32767, 32767, 32767, -4095, -12287, -20479, -28671, -32767, -32767, -32767, -32767 }; #pragma endregion // Last Express ADPCM is similar to MS IMA mono, but inverts its nibbles // and does not have the 4 byte per channel requirement class LastExpress_ADPCMStream : public Audio::ADPCMStream { public: LastExpress_ADPCMStream(Common::SeekableReadStream *stream, DisposeAfterUse::Flag disposeAfterUse, uint32 size, uint32 blockSize, uint32 volume, bool looped) : Audio::ADPCMStream(stream, disposeAfterUse, size, 44100, 1, blockSize) { _currentVolume = 0; _nextVolume = volume; _smoothChangeTarget = volume; _volumeHoldBlocks = 0; _running = true; _looped = looped; } bool endOfData() const override { return !_running || (!_looped && Audio::ADPCMStream::endOfData()); } void seekToBlock(uint32 block) { reset(); _stream->seek(_startpos + _blockAlign * block); } int readBuffer(int16 *buffer, const int numSamples) override { int samples = 0; // Temporary data int step = 0; int sample = 0; byte idx = 0; assert(numSamples % 2 == 0); while (_running && samples < numSamples) { if (Audio::ADPCMStream::endOfData()) { if (!_looped) break; rewind(); } if (_blockPos[0] == _blockAlign) { // read block header _status.ima_ch[0].last = _stream->readSint16LE(); _status.ima_ch[0].stepIndex = _stream->readSint16LE() << 6; _blockPos[0] = 4; // sanity check against broken stream if ((unsigned)_status.ima_ch[0].stepIndex >= ARRAYSIZE(stepTable) * 4) { // the original game sets kSoundFlagDecodeError here and stops playing _status.ima_ch[0].stepIndex = 0; } if (!smoothVolumeChangeStep()) { _running = false; break; } // Get current volume _currentVolume = _nextVolume; } for (; samples < numSamples && _blockPos[0] < _blockAlign && !_stream->eos() && _stream->pos() < _endpos; samples += 2) { byte data = _stream->readByte(); _blockPos[0]++; // First nibble idx = data >> 4; step = stepTable[idx + _status.ima_ch[0].stepIndex / 4]; sample = CLIP(imaTable[idx + _status.ima_ch[0].stepIndex / 4] + _status.ima_ch[0].last, -32767, 32767); buffer[samples] = (sample * _currentVolume) >> 4; // Second nibble idx = data & 0xF; _status.ima_ch[0].stepIndex = stepTable[idx + step / 4]; _status.ima_ch[0].last = CLIP(imaTable[idx + step / 4] + sample, -32767, 32767); buffer[samples + 1] = (_status.ima_ch[0].last * _currentVolume) >> 4; } } return samples; } void setVolume(uint32 newVolume) { _smoothChangeTarget = _nextVolume = newVolume; } void setVolumeSmoothly(uint32 newVolume) { _smoothChangeTarget = newVolume; } private: uint32 _currentVolume; uint32 _nextVolume; uint32 _smoothChangeTarget; uint32 _volumeHoldBlocks; // smooth change of volume keeps volume on hold for 4 blocks = 133ms for every value; this is the counter bool _running, _looped; bool smoothVolumeChangeStep() { if (_nextVolume == _smoothChangeTarget) return true; // the original game clears kSoundFlagVolumeChanging here if (_volumeHoldBlocks <= 3) { _volumeHoldBlocks++; return true; } if (_nextVolume < _smoothChangeTarget) ++_nextVolume; else --_nextVolume; _volumeHoldBlocks = 0; return (_nextVolume != 0); } }; ////////////////////////////////////////////////////////////////////////// // Sound ////////////////////////////////////////////////////////////////////////// SimpleSound::SimpleSound() : _size(0), _blocks(0), _blockSize(0) {} SimpleSound::~SimpleSound() { } // Stop the sound void SimpleSound::stop() const { g_system->getMixer()->stopHandle(_handle); } void SimpleSound::loadHeader(Common::SeekableReadStream *in) { _size = in->readUint32LE(); _blocks = in->readUint16LE(); debugC(5, kLastExpressDebugSound, " sound header data: size=\"%d\", %d blocks", _size, _blocks); assert (_size % _blocks == 0); _blockSize = _size / _blocks; } LastExpress_ADPCMStream *SimpleSound::makeDecoder(Common::SeekableReadStream *in, uint32 size, uint32 volume, bool looped) const { return new LastExpress_ADPCMStream(in, DisposeAfterUse::YES, size, _blockSize, volume, looped); } void SimpleSound::play(Audio::AudioStream *as, DisposeAfterUse::Flag autofreeStream) { g_system->getMixer()->playStream(Audio::Mixer::kPlainSoundType, &_handle, as, -1, Audio::Mixer::kMaxChannelVolume, 0, autofreeStream); } uint32 SimpleSound::getTimeMS() { return g_system->getMixer()->getSoundElapsedTime(_handle); } ////////////////////////////////////////////////////////////////////////// // StreamedSound ////////////////////////////////////////////////////////////////////////// StreamedSound::StreamedSound() : _as(NULL), _loaded(false) {} StreamedSound::~StreamedSound() { stop(); // should execute before disposal of _as, so don't move in ~SimpleSound delete _as; _as = NULL; } bool StreamedSound::load(Common::SeekableReadStream *stream, uint32 volume, bool looped, uint32 startBlock) { if (!stream) return false; g_system->getMixer()->stopHandle(_handle); loadHeader(stream); if (_as) { stop(); delete _as; } // Start decoding the input stream _as = makeDecoder(stream, _size, volume, looped); if (startBlock) _as->seekToBlock(startBlock); // Start playing the decoded audio stream play(_as, DisposeAfterUse::NO); _loaded = true; return true; } bool StreamedSound::isFinished() { if (!_loaded) return false; return !g_system->getMixer()->isSoundHandleActive(_handle); } void StreamedSound::setVolume(uint32 newVolume) { if (!_as) return; _as->setVolume(newVolume); } void StreamedSound::setVolumeSmoothly(uint32 newVolume) { if (!_as) return; _as->setVolumeSmoothly(newVolume); } ////////////////////////////////////////////////////////////////////////// // StreamedSound ////////////////////////////////////////////////////////////////////////// AppendableSound::AppendableSound() : SimpleSound() { // Create an audio stream where the decoded chunks will be appended _as = Audio::makeQueuingAudioStream(44100, false); _finished = false; // Start playing the decoded audio stream play(_as, DisposeAfterUse::YES); // Initialize the block size // TODO: get it as an argument? _blockSize = 739; } AppendableSound::~AppendableSound() { finish(); stop(); _as = NULL; } void AppendableSound::queueBuffer(const byte *data, uint32 size) { Common::MemoryReadStream *buffer = new Common::MemoryReadStream(data, size); queueBuffer(buffer); } void AppendableSound::queueBuffer(Common::SeekableReadStream *bufferIn) { if (!_as) error("[AppendableSound::queueBuffer] Audio stream is invalid"); // Setup the ADPCM decoder uint32 sizeIn = (uint32)bufferIn->size(); LastExpress_ADPCMStream *adpcm = makeDecoder(bufferIn, sizeIn, kVolumeFull, false); // Queue the stream _as->queueAudioStream(adpcm); } void AppendableSound::finish() { if (!_as) error("[AppendableSound::finish] Audio stream is invalid"); if (!_finished) _as->finish(); _finished = true; } bool AppendableSound::isFinished() { return _as->endOfStream(); } } // End of namespace LastExpress