#include #include "coding.h" #include "../util.h" /* SDX2 - 2:1 Squareroot-delta-exact compression */ /* CBD2 - 2:1 Cuberoot-delta-exact compression (from the unreleased 3DO M2) */ /* for (i=-128;i<128;i++) squares[i+128]=i<0?(-i*i)*2:(i*i)*2; */ static int16_t squares[256] = { -32768,-32258,-31752,-31250,-30752,-30258,-29768,-29282,-28800,-28322,-27848, -27378,-26912,-26450,-25992,-25538,-25088,-24642,-24200,-23762,-23328,-22898, -22472,-22050,-21632,-21218,-20808,-20402,-20000,-19602,-19208,-18818,-18432, -18050,-17672,-17298,-16928,-16562,-16200,-15842,-15488,-15138,-14792,-14450, -14112,-13778,-13448,-13122,-12800,-12482,-12168,-11858,-11552,-11250,-10952, -10658,-10368,-10082, -9800, -9522, -9248, -8978, -8712, -8450, -8192, -7938, -7688, -7442, -7200, -6962, -6728, -6498, -6272, -6050, -5832, -5618, -5408, -5202, -5000, -4802, -4608, -4418, -4232, -4050, -3872, -3698, -3528, -3362, -3200, -3042, -2888, -2738, -2592, -2450, -2312, -2178, -2048, -1922, -1800, -1682, -1568, -1458, -1352, -1250, -1152, -1058, -968, -882, -800, -722, -648, -578, -512, -450, -392, -338, -288, -242, -200, -162, -128, -98, -72, -50, -32, -18, -8, -2, 0, 2, 8, 18, 32, 50, 72, 98, 128, 162, 200, 242, 288, 338, 392, 450, 512, 578, 648, 722, 800, 882, 968, 1058, 1152, 1250, 1352, 1458, 1568, 1682, 1800, 1922, 2048, 2178, 2312, 2450, 2592, 2738, 2888, 3042, 3200, 3362, 3528, 3698, 3872, 4050, 4232, 4418, 4608, 4802, 5000, 5202, 5408, 5618, 5832, 6050, 6272, 6498, 6728, 6962, 7200, 7442, 7688, 7938, 8192, 8450, 8712, 8978, 9248, 9522, 9800, 10082, 10368, 10658, 10952, 11250, 11552, 11858, 12168, 12482, 12800, 13122, 13448, 13778, 14112, 14450, 14792, 15138, 15488, 15842, 16200, 16562, 16928, 17298, 17672, 18050, 18432, 18818, 19208, 19602, 20000, 20402, 20808, 21218, 21632, 22050, 22472, 22898, 23328, 23762, 24200, 24642, 25088, 25538, 25992, 26450, 26912, 27378, 27848, 28322, 28800, 29282, 29768, 30258, 30752, 31250, 31752, 32258 }; //for (i=-128;i<128;i++) //{ // double j = (i/2)/2.0; // cubes[i+128]=floor(j*j*j); //} static int16_t cubes[256]={ -32768,-31256,-31256,-29791,-29791,-28373,-28373,-27000,-27000,-25672,-25672, -24389,-24389,-23149,-23149,-21952,-21952,-20797,-20797,-19683,-19683,-18610, -18610,-17576,-17576,-16581,-16581,-15625,-15625,-14706,-14706,-13824,-13824, -12978,-12978,-12167,-12167,-11391,-11391,-10648,-10648, -9938, -9938, -9261, -9261, -8615, -8615, -8000, -8000, -7415, -7415, -6859, -6859, -6332, -6332, -5832, -5832, -5359, -5359, -4913, -4913, -4492, -4492, -4096, -4096, -3724, -3724, -3375, -3375, -3049, -3049, -2744, -2744, -2460, -2460, -2197, -2197, -1953, -1953, -1728, -1728, -1521, -1521, -1331, -1331, -1158, -1158, -1000, -1000, -857, -857, -729, -729, -614, -614, -512, -512, -422, -422, -343, -343, -275, -275, -216, -216, -166, -166, -125, -125, -91, -91, -64, -64, -43, -43, -27, -27, -16, -16, -8, -8, -3, -3, -1, -1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 3, 3, 8, 8, 16, 16, 27, 27, 43, 43, 64, 64, 91, 91, 125, 125, 166, 166, 216, 216, 275, 275, 343, 343, 422, 422, 512, 512, 614, 614, 729, 729, 857, 857, 1000, 1000, 1158, 1158, 1331, 1331, 1521, 1521, 1728, 1728, 1953, 1953, 2197, 2197, 2460, 2460, 2744, 2744, 3049, 3049, 3375, 3375, 3724, 3724, 4096, 4096, 4492, 4492, 4913, 4913, 5359, 5359, 5832, 5832, 6332, 6332, 6859, 6859, 7415, 7415, 8000, 8000, 8615, 8615, 9261, 9261, 9938, 9938, 10648, 10648, 11391, 11391, 12167, 12167, 12978, 12978, 13824, 13824, 14706, 14706, 15625, 15625, 16581, 16581, 17576, 17576, 18610, 18610, 19683, 19683, 20797, 20797, 21952, 21952, 23149, 23149, 24389, 24389, 25672, 25672, 27000, 27000, 28373, 28373, 29791, 29791, 31256, 31256}; static void decode_delta_exact(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do, int16_t * table) { int32_t hist = stream->adpcm_history1_32; int i; int32_t sample_count; for (i=first_sample,sample_count=0; ioffset+i,stream->streamfile); int16_t sample; if (!(sample_byte & 1)) hist = 0; sample = hist + table[sample_byte+128]; hist = outbuf[sample_count] = clamp16(sample); } stream->adpcm_history1_32=hist; } static void decode_delta_exact_int(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do, int16_t * table) { int32_t hist = stream->adpcm_history1_32; int i; int32_t sample_count; for (i=first_sample,sample_count=0; ioffset+i*channelspacing,stream->streamfile); int16_t sample; if (!(sample_byte & 1)) hist = 0; sample = hist + table[sample_byte+128]; hist = outbuf[sample_count] = clamp16(sample); } stream->adpcm_history1_32=hist; } void decode_sdx2(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do) { decode_delta_exact(stream, outbuf, channelspacing, first_sample, samples_to_do, squares); } void decode_sdx2_int(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do) { decode_delta_exact_int(stream, outbuf, channelspacing, first_sample, samples_to_do, squares); } void decode_cbd2(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do) { decode_delta_exact(stream, outbuf, channelspacing, first_sample, samples_to_do, cubes); } void decode_cbd2_int(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do) { decode_delta_exact_int(stream, outbuf, channelspacing, first_sample, samples_to_do, cubes); }