Spaces:
Runtime error
Runtime error
File size: 125,951 Bytes
c180660 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043 3044 3045 3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 |
r'''#===================================================================================================================
#
# MIDI to Colab AUdio Python Module
#
# Converts any MIDI file to raw audio which is compatible
# with Google Colab or HUgging Face Gradio
#
# Version 1.0
#
# Includes full source code of MIDI, pyfluidsynth, and midi_synthesizer Python modules
#
# Original source code for all modules was retrieved on 10/23/2023
#
# Project Los Angeles
# Tegridy Code 2023
#
#===================================================================================================================
#
# Critical dependencies
#
# pip install numpy
# sudo apt install fluidsynth
#
#===================================================================================================================
#
# Example usage:
#
# from midi_to_colab_audio import midi_to_colab_audio
# from IPython.display import display, Audio
#
# raw_audio = midi_to_colab_audio('/content/input.mid')
#
# display(Audio(raw_audio, rate=16000, normalize=False))
#
#===================================================================================================================
#! /usr/bin/python3
# unsupported 20091104 ...
# ['set_sequence_number', dtime, sequence]
# ['raw_data', dtime, raw]
# 20150914 jimbo1qaz MIDI.py str/bytes bug report
# I found a MIDI file which had Shift-JIS titles. When midi.py decodes it as
# latin-1, it produces a string which cannot even be accessed without raising
# a UnicodeDecodeError. Maybe, when converting raw byte strings from MIDI,
# you should keep them as bytes, not improperly decode them. However, this
# would change the API. (ie: text = a "string" ? of 0 or more bytes). It
# could break compatiblity, but there's not much else you can do to fix the bug
# https://en.wikipedia.org/wiki/Shift_JIS
This module offers functions: concatenate_scores(), grep(),
merge_scores(), mix_scores(), midi2opus(), midi2score(), opus2midi(),
opus2score(), play_score(), score2midi(), score2opus(), score2stats(),
score_type(), segment(), timeshift() and to_millisecs(),
where "midi" means the MIDI-file bytes (as can be put in a .mid file,
or piped into aplaymidi), and "opus" and "score" are list-structures
as inspired by Sean Burke's MIDI-Perl CPAN module.
Warning: Version 6.4 is not necessarily backward-compatible with
previous versions, in that text-data is now bytes, not strings.
This reflects the fact that many MIDI files have text data in
encodings other that ISO-8859-1, for example in Shift-JIS.
Download MIDI.py from http://www.pjb.com.au/midi/free/MIDI.py
and put it in your PYTHONPATH. MIDI.py depends on Python3.
There is also a call-compatible translation into Lua of this
module: see http://www.pjb.com.au/comp/lua/MIDI.html
Backup web site: https://peterbillam.gitlab.io/miditools/
The "opus" is a direct translation of the midi-file-events, where
the times are delta-times, in ticks, since the previous event.
The "score" is more human-centric; it uses absolute times, and
combines the separate note_on and note_off events into one "note"
event, with a duration:
['note', start_time, duration, channel, note, velocity] # in a "score"
EVENTS (in an "opus" structure)
['note_off', dtime, channel, note, velocity] # in an "opus"
['note_on', dtime, channel, note, velocity] # in an "opus"
['key_after_touch', dtime, channel, note, velocity]
['control_change', dtime, channel, controller(0-127), value(0-127)]
['patch_change', dtime, channel, patch]
['channel_after_touch', dtime, channel, velocity]
['pitch_wheel_change', dtime, channel, pitch_wheel]
['text_event', dtime, text]
['copyright_text_event', dtime, text]
['track_name', dtime, text]
['instrument_name', dtime, text]
['lyric', dtime, text]
['marker', dtime, text]
['cue_point', dtime, text]
['text_event_08', dtime, text]
['text_event_09', dtime, text]
['text_event_0a', dtime, text]
['text_event_0b', dtime, text]
['text_event_0c', dtime, text]
['text_event_0d', dtime, text]
['text_event_0e', dtime, text]
['text_event_0f', dtime, text]
['end_track', dtime]
['set_tempo', dtime, tempo]
['smpte_offset', dtime, hr, mn, se, fr, ff]
['time_signature', dtime, nn, dd, cc, bb]
['key_signature', dtime, sf, mi]
['sequencer_specific', dtime, raw]
['raw_meta_event', dtime, command(0-255), raw]
['sysex_f0', dtime, raw]
['sysex_f7', dtime, raw]
['song_position', dtime, song_pos]
['song_select', dtime, song_number]
['tune_request', dtime]
DATA TYPES
channel = a value 0 to 15
controller = 0 to 127 (see http://www.pjb.com.au/muscript/gm.html#cc )
dtime = time measured in "ticks", 0 to 268435455
velocity = a value 0 (soft) to 127 (loud)
note = a value 0 to 127 (middle-C is 60)
patch = 0 to 127 (see http://www.pjb.com.au/muscript/gm.html )
pitch_wheel = a value -8192 to 8191 (0x1FFF)
raw = bytes, of length 0 or more (for sysex events see below)
sequence_number = a value 0 to 65,535 (0xFFFF)
song_pos = a value 0 to 16,383 (0x3FFF)
song_number = a value 0 to 127
tempo = microseconds per crochet (quarter-note), 0 to 16777215
text = bytes, of length 0 or more
ticks = the number of ticks per crochet (quarter-note)
In sysex_f0 events, the raw data must not start with a \xF0 byte,
since this gets added automatically;
but it must end with an explicit \xF7 byte!
In the very unlikely case that you ever need to split sysex data
into one sysex_f0 followed by one or more sysex_f7s, then only the
last of those sysex_f7 events must end with the explicit \xF7 byte
(again, the raw data of individual sysex_f7 events must not start
with any \xF7 byte, since this gets added automatically).
Since version 6.4, text data is in bytes, not in a ISO-8859-1 string.
GOING THROUGH A SCORE WITHIN A PYTHON PROGRAM
channels = {2,3,5,8,13}
itrack = 1 # skip 1st element which is ticks
while itrack < len(score):
for event in score[itrack]:
if event[0] == 'note': # for example,
pass # do something to all notes
# or, to work on events in only particular channels...
channel_index = MIDI.Event2channelindex.get(event[0], False)
if channel_index and (event[channel_index] in channels):
pass # do something to channels 2,3,5,8 and 13
itrack += 1
'''
import sys, struct, copy
# sys.stdout = os.fdopen(sys.stdout.fileno(), 'wb')
Version = '6.7'
VersionDate = '20201120'
# 20201120 6.7 call to bytest() removed, and protect _unshift_ber_int
# 20160702 6.6 to_millisecs() now handles set_tempo across multiple Tracks
# 20150921 6.5 segment restores controllers as well as patch and tempo
# 20150914 6.4 text data is bytes or bytearray, not ISO-8859-1 strings
# 20150628 6.3 absent any set_tempo, default is 120bpm (see MIDI file spec 1.1)
# 20150101 6.2 all text events can be 8-bit; let user get the right encoding
# 20141231 6.1 fix _some_text_event; sequencer_specific data can be 8-bit
# 20141230 6.0 synth_specific data can be 8-bit
# 20120504 5.9 add the contents of mid_opus_tracks()
# 20120208 5.8 fix num_notes_by_channel() ; should be a dict
# 20120129 5.7 _encode handles empty tracks; score2stats num_notes_by_channel
# 20111111 5.6 fix patch 45 and 46 in Number2patch, should be Harp
# 20110129 5.5 add mix_opus_tracks() and event2alsaseq()
# 20110126 5.4 "previous message repeated N times" to save space on stderr
# 20110125 5.2 opus2score terminates unended notes at the end of the track
# 20110124 5.1 the warnings in midi2opus display track_num
# 21110122 5.0 if garbage, midi2opus returns the opus so far
# 21110119 4.9 non-ascii chars stripped out of the text_events
# 21110110 4.8 note_on with velocity=0 treated as a note-off
# 21110108 4.6 unknown F-series event correctly eats just one byte
# 21011010 4.2 segment() uses start_time, end_time named params
# 21011005 4.1 timeshift() must not pad the set_tempo command
# 21011003 4.0 pitch2note_event must be chapitch2note_event
# 21010918 3.9 set_sequence_number supported, FWIW
# 20100913 3.7 many small bugfixes; passes all tests
# 20100910 3.6 concatenate_scores enforce ticks=1000, just like merge_scores
# 20100908 3.5 minor bugs fixed in score2stats
# 20091104 3.4 tune_request now supported
# 20091104 3.3 fixed bug in decoding song_position and song_select
# 20091104 3.2 unsupported: set_sequence_number tune_request raw_data
# 20091101 3.1 document how to traverse a score within Python
# 20091021 3.0 fixed bug in score2stats detecting GM-mode = 0
# 20091020 2.9 score2stats reports GM-mode and bank msb,lsb events
# 20091019 2.8 in merge_scores, channel 9 must remain channel 9 (in GM)
# 20091018 2.7 handles empty tracks gracefully
# 20091015 2.6 grep() selects channels
# 20091010 2.5 merge_scores reassigns channels to avoid conflicts
# 20091010 2.4 fixed bug in to_millisecs which now only does opusses
# 20091010 2.3 score2stats returns channels & patch_changes, by_track & total
# 20091010 2.2 score2stats() returns also pitches and percussion dicts
# 20091010 2.1 bugs: >= not > in segment, to notice patch_change at time 0
# 20091010 2.0 bugs: spurious pop(0) ( in _decode sysex
# 20091008 1.9 bugs: ISO decoding in sysex; str( not int( in note-off warning
# 20091008 1.8 add concatenate_scores()
# 20091006 1.7 score2stats() measures nticks and ticks_per_quarter
# 20091004 1.6 first mix_scores() and merge_scores()
# 20090424 1.5 timeshift() bugfix: earliest only sees events after from_time
# 20090330 1.4 timeshift() has also a from_time argument
# 20090322 1.3 timeshift() has also a start_time argument
# 20090319 1.2 add segment() and timeshift()
# 20090301 1.1 add to_millisecs()
_previous_warning = '' # 5.4
_previous_times = 0 # 5.4
#------------------------------- Encoding stuff --------------------------
def opus2midi(opus=[]):
r'''The argument is a list: the first item in the list is the "ticks"
parameter, the others are the tracks. Each track is a list
of midi-events, and each event is itself a list; see above.
opus2midi() returns a bytestring of the MIDI, which can then be
written either to a file opened in binary mode (mode='wb'),
or to stdout by means of: sys.stdout.buffer.write()
my_opus = [
96,
[ # track 0:
['patch_change', 0, 1, 8], # and these are the events...
['note_on', 5, 1, 25, 96],
['note_off', 96, 1, 25, 0],
['note_on', 0, 1, 29, 96],
['note_off', 96, 1, 29, 0],
], # end of track 0
]
my_midi = opus2midi(my_opus)
sys.stdout.buffer.write(my_midi)
'''
if len(opus) < 2:
opus=[1000, [],]
tracks = copy.deepcopy(opus)
ticks = int(tracks.pop(0))
ntracks = len(tracks)
if ntracks == 1:
format = 0
else:
format = 1
my_midi = b"MThd\x00\x00\x00\x06"+struct.pack('>HHH',format,ntracks,ticks)
for track in tracks:
events = _encode(track)
my_midi += b'MTrk' + struct.pack('>I',len(events)) + events
_clean_up_warnings()
return my_midi
def score2opus(score=None):
r'''
The argument is a list: the first item in the list is the "ticks"
parameter, the others are the tracks. Each track is a list
of score-events, and each event is itself a list. A score-event
is similar to an opus-event (see above), except that in a score:
1) the times are expressed as an absolute number of ticks
from the track's start time
2) the pairs of 'note_on' and 'note_off' events in an "opus"
are abstracted into a single 'note' event in a "score":
['note', start_time, duration, channel, pitch, velocity]
score2opus() returns a list specifying the equivalent "opus".
my_score = [
96,
[ # track 0:
['patch_change', 0, 1, 8],
['note', 5, 96, 1, 25, 96],
['note', 101, 96, 1, 29, 96]
], # end of track 0
]
my_opus = score2opus(my_score)
'''
if len(score) < 2:
score=[1000, [],]
tracks = copy.deepcopy(score)
ticks = int(tracks.pop(0))
opus_tracks = []
for scoretrack in tracks:
time2events = dict([])
for scoreevent in scoretrack:
if scoreevent[0] == 'note':
note_on_event = ['note_on',scoreevent[1],
scoreevent[3],scoreevent[4],scoreevent[5]]
note_off_event = ['note_off',scoreevent[1]+scoreevent[2],
scoreevent[3],scoreevent[4],scoreevent[5]]
if time2events.get(note_on_event[1]):
time2events[note_on_event[1]].append(note_on_event)
else:
time2events[note_on_event[1]] = [note_on_event,]
if time2events.get(note_off_event[1]):
time2events[note_off_event[1]].append(note_off_event)
else:
time2events[note_off_event[1]] = [note_off_event,]
continue
if time2events.get(scoreevent[1]):
time2events[scoreevent[1]].append(scoreevent)
else:
time2events[scoreevent[1]] = [scoreevent,]
sorted_times = [] # list of keys
for k in time2events.keys():
sorted_times.append(k)
sorted_times.sort()
sorted_events = [] # once-flattened list of values sorted by key
for time in sorted_times:
sorted_events.extend(time2events[time])
abs_time = 0
for event in sorted_events: # convert abs times => delta times
delta_time = event[1] - abs_time
abs_time = event[1]
event[1] = delta_time
opus_tracks.append(sorted_events)
opus_tracks.insert(0,ticks)
_clean_up_warnings()
return opus_tracks
def score2midi(score=None):
r'''
Translates a "score" into MIDI, using score2opus() then opus2midi()
'''
return opus2midi(score2opus(score))
#--------------------------- Decoding stuff ------------------------
def midi2opus(midi=b''):
r'''Translates MIDI into a "opus". For a description of the
"opus" format, see opus2midi()
'''
my_midi=bytearray(midi)
if len(my_midi) < 4:
_clean_up_warnings()
return [1000,[],]
id = bytes(my_midi[0:4])
if id != b'MThd':
_warn("midi2opus: midi starts with "+str(id)+" instead of 'MThd'")
_clean_up_warnings()
return [1000,[],]
[length, format, tracks_expected, ticks] = struct.unpack(
'>IHHH', bytes(my_midi[4:14]))
if length != 6:
_warn("midi2opus: midi header length was "+str(length)+" instead of 6")
_clean_up_warnings()
return [1000,[],]
my_opus = [ticks,]
my_midi = my_midi[14:]
track_num = 1 # 5.1
while len(my_midi) >= 8:
track_type = bytes(my_midi[0:4])
if track_type != b'MTrk':
_warn('midi2opus: Warning: track #'+str(track_num)+' type is '+str(track_type)+" instead of b'MTrk'")
[track_length] = struct.unpack('>I', my_midi[4:8])
my_midi = my_midi[8:]
if track_length > len(my_midi):
_warn('midi2opus: track #'+str(track_num)+' length '+str(track_length)+' is too large')
_clean_up_warnings()
return my_opus # 5.0
my_midi_track = my_midi[0:track_length]
my_track = _decode(my_midi_track)
my_opus.append(my_track)
my_midi = my_midi[track_length:]
track_num += 1 # 5.1
_clean_up_warnings()
return my_opus
def opus2score(opus=[]):
r'''For a description of the "opus" and "score" formats,
see opus2midi() and score2opus().
'''
if len(opus) < 2:
_clean_up_warnings()
return [1000,[],]
tracks = copy.deepcopy(opus) # couple of slices probably quicker...
ticks = int(tracks.pop(0))
score = [ticks,]
for opus_track in tracks:
ticks_so_far = 0
score_track = []
chapitch2note_on_events = dict([]) # 4.0
for opus_event in opus_track:
ticks_so_far += opus_event[1]
if opus_event[0] == 'note_off' or (opus_event[0] == 'note_on' and opus_event[4] == 0): # 4.8
cha = opus_event[2]
pitch = opus_event[3]
key = cha*128 + pitch
if chapitch2note_on_events.get(key):
new_event = chapitch2note_on_events[key].pop(0)
new_event[2] = ticks_so_far - new_event[1]
score_track.append(new_event)
elif pitch > 127:
pass #_warn('opus2score: note_off with no note_on, bad pitch='+str(pitch))
else:
pass #_warn('opus2score: note_off with no note_on cha='+str(cha)+' pitch='+str(pitch))
elif opus_event[0] == 'note_on':
cha = opus_event[2]
pitch = opus_event[3]
key = cha*128 + pitch
new_event = ['note',ticks_so_far,0,cha,pitch, opus_event[4]]
if chapitch2note_on_events.get(key):
chapitch2note_on_events[key].append(new_event)
else:
chapitch2note_on_events[key] = [new_event,]
else:
opus_event[1] = ticks_so_far
score_track.append(opus_event)
# check for unterminated notes (Oisín) -- 5.2
for chapitch in chapitch2note_on_events:
note_on_events = chapitch2note_on_events[chapitch]
for new_e in note_on_events:
new_e[2] = ticks_so_far - new_e[1]
score_track.append(new_e)
pass #_warn("opus2score: note_on with no note_off cha="+str(new_e[3])+' pitch='+str(new_e[4])+'; adding note_off at end')
score.append(score_track)
_clean_up_warnings()
return score
def midi2score(midi=b''):
r'''
Translates MIDI into a "score", using midi2opus() then opus2score()
'''
return opus2score(midi2opus(midi))
def midi2ms_score(midi=b''):
r'''
Translates MIDI into a "score" with one beat per second and one
tick per millisecond, using midi2opus() then to_millisecs()
then opus2score()
'''
return opus2score(to_millisecs(midi2opus(midi)))
#------------------------ Other Transformations ---------------------
def to_millisecs(old_opus=None):
r'''Recallibrates all the times in an "opus" to use one beat
per second and one tick per millisecond. This makes it
hard to retrieve any information about beats or barlines,
but it does make it easy to mix different scores together.
'''
if old_opus == None:
return [1000,[],]
try:
old_tpq = int(old_opus[0])
except IndexError: # 5.0
_warn('to_millisecs: the opus '+str(type(old_opus))+' has no elements')
return [1000,[],]
new_opus = [1000,]
# 6.7 first go through building a table of set_tempos by absolute-tick
ticks2tempo = {}
itrack = 1
while itrack < len(old_opus):
ticks_so_far = 0
for old_event in old_opus[itrack]:
if old_event[0] == 'note':
raise TypeError('to_millisecs needs an opus, not a score')
ticks_so_far += old_event[1]
if old_event[0] == 'set_tempo':
ticks2tempo[ticks_so_far] = old_event[2]
itrack += 1
# then get the sorted-array of their keys
tempo_ticks = [] # list of keys
for k in ticks2tempo.keys():
tempo_ticks.append(k)
tempo_ticks.sort()
# then go through converting to millisec, testing if the next
# set_tempo lies before the next track-event, and using it if so.
itrack = 1
while itrack < len(old_opus):
ms_per_old_tick = 500.0 / old_tpq # float: will round later 6.3
i_tempo_ticks = 0
ticks_so_far = 0
ms_so_far = 0.0
previous_ms_so_far = 0.0
new_track = [['set_tempo',0,1000000],] # new "crochet" is 1 sec
for old_event in old_opus[itrack]:
# detect if ticks2tempo has something before this event
# 20160702 if ticks2tempo is at the same time, leave it
event_delta_ticks = old_event[1]
if (i_tempo_ticks < len(tempo_ticks) and
tempo_ticks[i_tempo_ticks] < (ticks_so_far + old_event[1])):
delta_ticks = tempo_ticks[i_tempo_ticks] - ticks_so_far
ms_so_far += (ms_per_old_tick * delta_ticks)
ticks_so_far = tempo_ticks[i_tempo_ticks]
ms_per_old_tick = ticks2tempo[ticks_so_far] / (1000.0*old_tpq)
i_tempo_ticks += 1
event_delta_ticks -= delta_ticks
new_event = copy.deepcopy(old_event) # now handle the new event
ms_so_far += (ms_per_old_tick * old_event[1])
new_event[1] = round(ms_so_far - previous_ms_so_far)
if old_event[0] != 'set_tempo':
previous_ms_so_far = ms_so_far
new_track.append(new_event)
ticks_so_far += event_delta_ticks
new_opus.append(new_track)
itrack += 1
_clean_up_warnings()
return new_opus
def event2alsaseq(event=None): # 5.5
r'''Converts an event into the format needed by the alsaseq module,
http://pp.com.mx/python/alsaseq
The type of track (opus or score) is autodetected.
'''
pass
def grep(score=None, channels=None):
r'''Returns a "score" containing only the channels specified
'''
if score == None:
return [1000,[],]
ticks = score[0]
new_score = [ticks,]
if channels == None:
return new_score
channels = set(channels)
global Event2channelindex
itrack = 1
while itrack < len(score):
new_score.append([])
for event in score[itrack]:
channel_index = Event2channelindex.get(event[0], False)
if channel_index:
if event[channel_index] in channels:
new_score[itrack].append(event)
else:
new_score[itrack].append(event)
itrack += 1
return new_score
def play_score(score=None):
r'''Converts the "score" to midi, and feeds it into 'aplaymidi -'
'''
if score == None:
return
import subprocess
pipe = subprocess.Popen(['aplaymidi','-'], stdin=subprocess.PIPE)
if score_type(score) == 'opus':
pipe.stdin.write(opus2midi(score))
else:
pipe.stdin.write(score2midi(score))
pipe.stdin.close()
def timeshift(score=None, shift=None, start_time=None, from_time=0, tracks={0,1,2,3,4,5,6,7,8,10,12,13,14,15}):
r'''Returns a "score" shifted in time by "shift" ticks, or shifted
so that the first event starts at "start_time" ticks.
If "from_time" is specified, only those events in the score
that begin after it are shifted. If "start_time" is less than
"from_time" (or "shift" is negative), then the intermediate
notes are deleted, though patch-change events are preserved.
If "tracks" are specified, then only those tracks get shifted.
"tracks" can be a list, tuple or set; it gets converted to set
internally.
It is deprecated to specify both "shift" and "start_time".
If this does happen, timeshift() will print a warning to
stderr and ignore the "shift" argument.
If "shift" is negative and sufficiently large that it would
leave some event with a negative tick-value, then the score
is shifted so that the first event occurs at time 0. This
also occurs if "start_time" is negative, and is also the
default if neither "shift" nor "start_time" are specified.
'''
#_warn('tracks='+str(tracks))
if score == None or len(score) < 2:
return [1000, [],]
new_score = [score[0],]
my_type = score_type(score)
if my_type == '':
return new_score
if my_type == 'opus':
_warn("timeshift: opus format is not supported\n")
# _clean_up_scores() 6.2; doesn't exist! what was it supposed to do?
return new_score
if not (shift == None) and not (start_time == None):
_warn("timeshift: shift and start_time specified: ignoring shift\n")
shift = None
if shift == None:
if (start_time == None) or (start_time < 0):
start_time = 0
# shift = start_time - from_time
i = 1 # ignore first element (ticks)
tracks = set(tracks) # defend against tuples and lists
earliest = 1000000000
if not (start_time == None) or shift < 0: # first find the earliest event
while i < len(score):
if len(tracks) and not ((i-1) in tracks):
i += 1
continue
for event in score[i]:
if event[1] < from_time:
continue # just inspect the to_be_shifted events
if event[1] < earliest:
earliest = event[1]
i += 1
if earliest > 999999999:
earliest = 0
if shift == None:
shift = start_time - earliest
elif (earliest + shift) < 0:
start_time = 0
shift = 0 - earliest
i = 1 # ignore first element (ticks)
while i < len(score):
if len(tracks) == 0 or not ((i-1) in tracks): # 3.8
new_score.append(score[i])
i += 1
continue
new_track = []
for event in score[i]:
new_event = list(event)
#if new_event[1] == 0 and shift > 0 and new_event[0] != 'note':
# pass
#elif new_event[1] >= from_time:
if new_event[1] >= from_time:
# 4.1 must not rightshift set_tempo
if new_event[0] != 'set_tempo' or shift<0:
new_event[1] += shift
elif (shift < 0) and (new_event[1] >= (from_time+shift)):
continue
new_track.append(new_event)
if len(new_track) > 0:
new_score.append(new_track)
i += 1
_clean_up_warnings()
return new_score
def segment(score=None, start_time=None, end_time=None, start=0, end=100000000,
tracks={0,1,2,3,4,5,6,7,8,10,11,12,13,14,15}):
r'''Returns a "score" which is a segment of the one supplied
as the argument, beginning at "start_time" ticks and ending
at "end_time" ticks (or at the end if "end_time" is not supplied).
If the set "tracks" is specified, only those tracks will
be returned.
'''
if score == None or len(score) < 2:
return [1000, [],]
if start_time == None: # as of 4.2 start_time is recommended
start_time = start # start is legacy usage
if end_time == None: # likewise
end_time = end
new_score = [score[0],]
my_type = score_type(score)
if my_type == '':
return new_score
if my_type == 'opus':
# more difficult (disconnecting note_on's from their note_off's)...
_warn("segment: opus format is not supported\n")
_clean_up_warnings()
return new_score
i = 1 # ignore first element (ticks); we count in ticks anyway
tracks = set(tracks) # defend against tuples and lists
while i < len(score):
if len(tracks) and not ((i-1) in tracks):
i += 1
continue
new_track = []
channel2cc_num = {} # most recent controller change before start
channel2cc_val = {}
channel2cc_time = {}
channel2patch_num = {} # keep most recent patch change before start
channel2patch_time = {}
set_tempo_num = 500000 # most recent tempo change before start 6.3
set_tempo_time = 0
earliest_note_time = end_time
for event in score[i]:
if event[0] == 'control_change': # 6.5
cc_time = channel2cc_time.get(event[2]) or 0
if (event[1] <= start_time) and (event[1] >= cc_time):
channel2cc_num[event[2]] = event[3]
channel2cc_val[event[2]] = event[4]
channel2cc_time[event[2]] = event[1]
elif event[0] == 'patch_change':
patch_time = channel2patch_time.get(event[2]) or 0
if (event[1]<=start_time) and (event[1] >= patch_time): # 2.0
channel2patch_num[event[2]] = event[3]
channel2patch_time[event[2]] = event[1]
elif event[0] == 'set_tempo':
if (event[1]<=start_time) and (event[1]>=set_tempo_time): #6.4
set_tempo_num = event[2]
set_tempo_time = event[1]
if (event[1] >= start_time) and (event[1] <= end_time):
new_track.append(event)
if (event[0] == 'note') and (event[1] < earliest_note_time):
earliest_note_time = event[1]
if len(new_track) > 0:
new_track.append(['set_tempo', start_time, set_tempo_num])
for c in channel2patch_num:
new_track.append(['patch_change',start_time,c,channel2patch_num[c]],)
for c in channel2cc_num: # 6.5
new_track.append(['control_change',start_time,c,channel2cc_num[c],channel2cc_val[c]])
new_score.append(new_track)
i += 1
_clean_up_warnings()
return new_score
def score_type(opus_or_score=None):
r'''Returns a string, either 'opus' or 'score' or ''
'''
if opus_or_score == None or str(type(opus_or_score)).find('list')<0 or len(opus_or_score) < 2:
return ''
i = 1 # ignore first element
while i < len(opus_or_score):
for event in opus_or_score[i]:
if event[0] == 'note':
return 'score'
elif event[0] == 'note_on':
return 'opus'
i += 1
return ''
def concatenate_scores(scores):
r'''Concatenates a list of scores into one score.
If the scores differ in their "ticks" parameter,
they will all get converted to millisecond-tick format.
'''
# the deepcopys are needed if the input_score's are refs to the same obj
# e.g. if invoked by midisox's repeat()
input_scores = _consistentise_ticks(scores) # 3.7
output_score = copy.deepcopy(input_scores[0])
for input_score in input_scores[1:]:
output_stats = score2stats(output_score)
delta_ticks = output_stats['nticks']
itrack = 1
while itrack < len(input_score):
if itrack >= len(output_score): # new output track if doesn't exist
output_score.append([])
for event in input_score[itrack]:
output_score[itrack].append(copy.deepcopy(event))
output_score[itrack][-1][1] += delta_ticks
itrack += 1
return output_score
def merge_scores(scores):
r'''Merges a list of scores into one score. A merged score comprises
all of the tracks from all of the input scores; un-merging is possible
by selecting just some of the tracks. If the scores differ in their
"ticks" parameter, they will all get converted to millisecond-tick
format. merge_scores attempts to resolve channel-conflicts,
but there are of course only 15 available channels...
'''
input_scores = _consistentise_ticks(scores) # 3.6
output_score = [1000]
channels_so_far = set()
all_channels = {0,1,2,3,4,5,6,7,8,10,11,12,13,14,15}
global Event2channelindex
for input_score in input_scores:
new_channels = set(score2stats(input_score).get('channels_total', []))
new_channels.discard(9) # 2.8 cha9 must remain cha9 (in GM)
for channel in channels_so_far & new_channels:
# consistently choose lowest avaiable, to ease testing
free_channels = list(all_channels - (channels_so_far|new_channels))
if len(free_channels) > 0:
free_channels.sort()
free_channel = free_channels[0]
else:
free_channel = None
break
itrack = 1
while itrack < len(input_score):
for input_event in input_score[itrack]:
channel_index=Event2channelindex.get(input_event[0],False)
if channel_index and input_event[channel_index]==channel:
input_event[channel_index] = free_channel
itrack += 1
channels_so_far.add(free_channel)
channels_so_far |= new_channels
output_score.extend(input_score[1:])
return output_score
def _ticks(event):
return event[1]
def mix_opus_tracks(input_tracks): # 5.5
r'''Mixes an array of tracks into one track. A mixed track
cannot be un-mixed. It is assumed that the tracks share the same
ticks parameter and the same tempo.
Mixing score-tracks is trivial (just insert all events into one array).
Mixing opus-tracks is only slightly harder, but it's common enough
that a dedicated function is useful.
'''
output_score = [1000, []]
for input_track in input_tracks: # 5.8
input_score = opus2score([1000, input_track])
for event in input_score[1]:
output_score[1].append(event)
output_score[1].sort(key=_ticks)
output_opus = score2opus(output_score)
return output_opus[1]
def mix_scores(scores):
r'''Mixes a list of scores into one one-track score.
A mixed score cannot be un-mixed. Hopefully the scores
have no undesirable channel-conflicts between them.
If the scores differ in their "ticks" parameter,
they will all get converted to millisecond-tick format.
'''
input_scores = _consistentise_ticks(scores) # 3.6
output_score = [1000, []]
for input_score in input_scores:
for input_track in input_score[1:]:
output_score[1].extend(input_track)
return output_score
def score2stats(opus_or_score=None):
r'''Returns a dict of some basic stats about the score, like
bank_select (list of tuples (msb,lsb)),
channels_by_track (list of lists), channels_total (set),
general_midi_mode (list),
ntracks, nticks, patch_changes_by_track (list of dicts),
num_notes_by_channel (list of numbers),
patch_changes_total (set),
percussion (dict histogram of channel 9 events),
pitches (dict histogram of pitches on channels other than 9),
pitch_range_by_track (list, by track, of two-member-tuples),
pitch_range_sum (sum over tracks of the pitch_ranges),
'''
bank_select_msb = -1
bank_select_lsb = -1
bank_select = []
channels_by_track = []
channels_total = set([])
general_midi_mode = []
num_notes_by_channel = dict([])
patches_used_by_track = []
patches_used_total = set([])
patch_changes_by_track = []
patch_changes_total = set([])
percussion = dict([]) # histogram of channel 9 "pitches"
pitches = dict([]) # histogram of pitch-occurrences channels 0-8,10-15
pitch_range_sum = 0 # u pitch-ranges of each track
pitch_range_by_track = []
is_a_score = True
if opus_or_score == None:
return {'bank_select':[], 'channels_by_track':[], 'channels_total':[],
'general_midi_mode':[], 'ntracks':0, 'nticks':0,
'num_notes_by_channel':dict([]),
'patch_changes_by_track':[], 'patch_changes_total':[],
'percussion':{}, 'pitches':{}, 'pitch_range_by_track':[],
'ticks_per_quarter':0, 'pitch_range_sum':0}
ticks_per_quarter = opus_or_score[0]
i = 1 # ignore first element, which is ticks
nticks = 0
while i < len(opus_or_score):
highest_pitch = 0
lowest_pitch = 128
channels_this_track = set([])
patch_changes_this_track = dict({})
for event in opus_or_score[i]:
if event[0] == 'note':
num_notes_by_channel[event[3]] = num_notes_by_channel.get(event[3],0) + 1
if event[3] == 9:
percussion[event[4]] = percussion.get(event[4],0) + 1
else:
pitches[event[4]] = pitches.get(event[4],0) + 1
if event[4] > highest_pitch:
highest_pitch = event[4]
if event[4] < lowest_pitch:
lowest_pitch = event[4]
channels_this_track.add(event[3])
channels_total.add(event[3])
finish_time = event[1] + event[2]
if finish_time > nticks:
nticks = finish_time
elif event[0] == 'note_off' or (event[0] == 'note_on' and event[4] == 0): # 4.8
finish_time = event[1]
if finish_time > nticks:
nticks = finish_time
elif event[0] == 'note_on':
is_a_score = False
num_notes_by_channel[event[2]] = num_notes_by_channel.get(event[2],0) + 1
if event[2] == 9:
percussion[event[3]] = percussion.get(event[3],0) + 1
else:
pitches[event[3]] = pitches.get(event[3],0) + 1
if event[3] > highest_pitch:
highest_pitch = event[3]
if event[3] < lowest_pitch:
lowest_pitch = event[3]
channels_this_track.add(event[2])
channels_total.add(event[2])
elif event[0] == 'patch_change':
patch_changes_this_track[event[2]] = event[3]
patch_changes_total.add(event[3])
elif event[0] == 'control_change':
if event[3] == 0: # bank select MSB
bank_select_msb = event[4]
elif event[3] == 32: # bank select LSB
bank_select_lsb = event[4]
if bank_select_msb >= 0 and bank_select_lsb >= 0:
bank_select.append((bank_select_msb,bank_select_lsb))
bank_select_msb = -1
bank_select_lsb = -1
elif event[0] == 'sysex_f0':
if _sysex2midimode.get(event[2], -1) >= 0:
general_midi_mode.append(_sysex2midimode.get(event[2]))
if is_a_score:
if event[1] > nticks:
nticks = event[1]
else:
nticks += event[1]
if lowest_pitch == 128:
lowest_pitch = 0
channels_by_track.append(channels_this_track)
patch_changes_by_track.append(patch_changes_this_track)
pitch_range_by_track.append((lowest_pitch,highest_pitch))
pitch_range_sum += (highest_pitch-lowest_pitch)
i += 1
return {'bank_select':bank_select,
'channels_by_track':channels_by_track,
'channels_total':channels_total,
'general_midi_mode':general_midi_mode,
'ntracks':len(opus_or_score)-1,
'nticks':nticks,
'num_notes_by_channel':num_notes_by_channel,
'patch_changes_by_track':patch_changes_by_track,
'patch_changes_total':patch_changes_total,
'percussion':percussion,
'pitches':pitches,
'pitch_range_by_track':pitch_range_by_track,
'pitch_range_sum':pitch_range_sum,
'ticks_per_quarter':ticks_per_quarter}
#----------------------------- Event stuff --------------------------
_sysex2midimode = {
"\x7E\x7F\x09\x01\xF7": 1,
"\x7E\x7F\x09\x02\xF7": 0,
"\x7E\x7F\x09\x03\xF7": 2,
}
# Some public-access tuples:
MIDI_events = tuple('''note_off note_on key_after_touch
control_change patch_change channel_after_touch
pitch_wheel_change'''.split())
Text_events = tuple('''text_event copyright_text_event
track_name instrument_name lyric marker cue_point text_event_08
text_event_09 text_event_0a text_event_0b text_event_0c
text_event_0d text_event_0e text_event_0f'''.split())
Nontext_meta_events = tuple('''end_track set_tempo
smpte_offset time_signature key_signature sequencer_specific
raw_meta_event sysex_f0 sysex_f7 song_position song_select
tune_request'''.split())
# unsupported: raw_data
# Actually, 'tune_request' is is F-series event, not strictly a meta-event...
Meta_events = Text_events + Nontext_meta_events
All_events = MIDI_events + Meta_events
# And three dictionaries:
Number2patch = { # General MIDI patch numbers:
0:'Acoustic Grand',
1:'Bright Acoustic',
2:'Electric Grand',
3:'Honky-Tonk',
4:'Electric Piano 1',
5:'Electric Piano 2',
6:'Harpsichord',
7:'Clav',
8:'Celesta',
9:'Glockenspiel',
10:'Music Box',
11:'Vibraphone',
12:'Marimba',
13:'Xylophone',
14:'Tubular Bells',
15:'Dulcimer',
16:'Drawbar Organ',
17:'Percussive Organ',
18:'Rock Organ',
19:'Church Organ',
20:'Reed Organ',
21:'Accordion',
22:'Harmonica',
23:'Tango Accordion',
24:'Acoustic Guitar(nylon)',
25:'Acoustic Guitar(steel)',
26:'Electric Guitar(jazz)',
27:'Electric Guitar(clean)',
28:'Electric Guitar(muted)',
29:'Overdriven Guitar',
30:'Distortion Guitar',
31:'Guitar Harmonics',
32:'Acoustic Bass',
33:'Electric Bass(finger)',
34:'Electric Bass(pick)',
35:'Fretless Bass',
36:'Slap Bass 1',
37:'Slap Bass 2',
38:'Synth Bass 1',
39:'Synth Bass 2',
40:'Violin',
41:'Viola',
42:'Cello',
43:'Contrabass',
44:'Tremolo Strings',
45:'Pizzicato Strings',
46:'Orchestral Harp',
47:'Timpani',
48:'String Ensemble 1',
49:'String Ensemble 2',
50:'SynthStrings 1',
51:'SynthStrings 2',
52:'Choir Aahs',
53:'Voice Oohs',
54:'Synth Voice',
55:'Orchestra Hit',
56:'Trumpet',
57:'Trombone',
58:'Tuba',
59:'Muted Trumpet',
60:'French Horn',
61:'Brass Section',
62:'SynthBrass 1',
63:'SynthBrass 2',
64:'Soprano Sax',
65:'Alto Sax',
66:'Tenor Sax',
67:'Baritone Sax',
68:'Oboe',
69:'English Horn',
70:'Bassoon',
71:'Clarinet',
72:'Piccolo',
73:'Flute',
74:'Recorder',
75:'Pan Flute',
76:'Blown Bottle',
77:'Skakuhachi',
78:'Whistle',
79:'Ocarina',
80:'Lead 1 (square)',
81:'Lead 2 (sawtooth)',
82:'Lead 3 (calliope)',
83:'Lead 4 (chiff)',
84:'Lead 5 (charang)',
85:'Lead 6 (voice)',
86:'Lead 7 (fifths)',
87:'Lead 8 (bass+lead)',
88:'Pad 1 (new age)',
89:'Pad 2 (warm)',
90:'Pad 3 (polysynth)',
91:'Pad 4 (choir)',
92:'Pad 5 (bowed)',
93:'Pad 6 (metallic)',
94:'Pad 7 (halo)',
95:'Pad 8 (sweep)',
96:'FX 1 (rain)',
97:'FX 2 (soundtrack)',
98:'FX 3 (crystal)',
99:'FX 4 (atmosphere)',
100:'FX 5 (brightness)',
101:'FX 6 (goblins)',
102:'FX 7 (echoes)',
103:'FX 8 (sci-fi)',
104:'Sitar',
105:'Banjo',
106:'Shamisen',
107:'Koto',
108:'Kalimba',
109:'Bagpipe',
110:'Fiddle',
111:'Shanai',
112:'Tinkle Bell',
113:'Agogo',
114:'Steel Drums',
115:'Woodblock',
116:'Taiko Drum',
117:'Melodic Tom',
118:'Synth Drum',
119:'Reverse Cymbal',
120:'Guitar Fret Noise',
121:'Breath Noise',
122:'Seashore',
123:'Bird Tweet',
124:'Telephone Ring',
125:'Helicopter',
126:'Applause',
127:'Gunshot',
}
Notenum2percussion = { # General MIDI Percussion (on Channel 9):
35:'Acoustic Bass Drum',
36:'Bass Drum 1',
37:'Side Stick',
38:'Acoustic Snare',
39:'Hand Clap',
40:'Electric Snare',
41:'Low Floor Tom',
42:'Closed Hi-Hat',
43:'High Floor Tom',
44:'Pedal Hi-Hat',
45:'Low Tom',
46:'Open Hi-Hat',
47:'Low-Mid Tom',
48:'Hi-Mid Tom',
49:'Crash Cymbal 1',
50:'High Tom',
51:'Ride Cymbal 1',
52:'Chinese Cymbal',
53:'Ride Bell',
54:'Tambourine',
55:'Splash Cymbal',
56:'Cowbell',
57:'Crash Cymbal 2',
58:'Vibraslap',
59:'Ride Cymbal 2',
60:'Hi Bongo',
61:'Low Bongo',
62:'Mute Hi Conga',
63:'Open Hi Conga',
64:'Low Conga',
65:'High Timbale',
66:'Low Timbale',
67:'High Agogo',
68:'Low Agogo',
69:'Cabasa',
70:'Maracas',
71:'Short Whistle',
72:'Long Whistle',
73:'Short Guiro',
74:'Long Guiro',
75:'Claves',
76:'Hi Wood Block',
77:'Low Wood Block',
78:'Mute Cuica',
79:'Open Cuica',
80:'Mute Triangle',
81:'Open Triangle',
}
Event2channelindex = { 'note':3, 'note_off':2, 'note_on':2,
'key_after_touch':2, 'control_change':2, 'patch_change':2,
'channel_after_touch':2, 'pitch_wheel_change':2
}
################################################################
# The code below this line is full of frightening things, all to
# do with the actual encoding and decoding of binary MIDI data.
def _twobytes2int(byte_a):
r'''decode a 16 bit quantity from two bytes,'''
return (byte_a[1] | (byte_a[0] << 8))
def _int2twobytes(int_16bit):
r'''encode a 16 bit quantity into two bytes,'''
return bytes([(int_16bit>>8) & 0xFF, int_16bit & 0xFF])
def _read_14_bit(byte_a):
r'''decode a 14 bit quantity from two bytes,'''
return (byte_a[0] | (byte_a[1] << 7))
def _write_14_bit(int_14bit):
r'''encode a 14 bit quantity into two bytes,'''
return bytes([int_14bit & 0x7F, (int_14bit>>7) & 0x7F])
def _ber_compressed_int(integer):
r'''BER compressed integer (not an ASN.1 BER, see perlpacktut for
details). Its bytes represent an unsigned integer in base 128,
most significant digit first, with as few digits as possible.
Bit eight (the high bit) is set on each byte except the last.
'''
ber = bytearray(b'')
seven_bits = 0x7F & integer
ber.insert(0, seven_bits) # XXX surely should convert to a char ?
integer >>= 7
while integer > 0:
seven_bits = 0x7F & integer
ber.insert(0, 0x80|seven_bits) # XXX surely should convert to a char ?
integer >>= 7
return ber
def _unshift_ber_int(ba):
r'''Given a bytearray, returns a tuple of (the ber-integer at the
start, and the remainder of the bytearray).
'''
if not len(ba): # 6.7
_warn('_unshift_ber_int: no integer found')
return ((0, b""))
byte = ba.pop(0)
integer = 0
while True:
integer += (byte & 0x7F)
if not (byte & 0x80):
return ((integer, ba))
if not len(ba):
_warn('_unshift_ber_int: no end-of-integer found')
return ((0, ba))
byte = ba.pop(0)
integer <<= 7
def _clean_up_warnings(): # 5.4
# Call this before returning from any publicly callable function
# whenever there's a possibility that a warning might have been printed
# by the function, or by any private functions it might have called.
global _previous_times
global _previous_warning
if _previous_times > 1:
# E:1176, 0: invalid syntax (<string>, line 1176) (syntax-error) ???
# print(' previous message repeated '+str(_previous_times)+' times', file=sys.stderr)
# 6.7
sys.stderr.write(' previous message repeated {0} times\n'.format(_previous_times))
elif _previous_times > 0:
sys.stderr.write(' previous message repeated\n')
_previous_times = 0
_previous_warning = ''
def _warn(s=''):
global _previous_times
global _previous_warning
if s == _previous_warning: # 5.4
_previous_times = _previous_times + 1
else:
_clean_up_warnings()
sys.stderr.write(str(s)+"\n")
_previous_warning = s
def _some_text_event(which_kind=0x01, text=b'some_text'):
if str(type(text)).find("'str'") >= 0: # 6.4 test for back-compatibility
data = bytes(text, encoding='ISO-8859-1')
else:
data = bytes(text)
return b'\xFF'+bytes((which_kind,))+_ber_compressed_int(len(data))+data
def _consistentise_ticks(scores): # 3.6
# used by mix_scores, merge_scores, concatenate_scores
if len(scores) == 1:
return copy.deepcopy(scores)
are_consistent = True
ticks = scores[0][0]
iscore = 1
while iscore < len(scores):
if scores[iscore][0] != ticks:
are_consistent = False
break
iscore += 1
if are_consistent:
return copy.deepcopy(scores)
new_scores = []
iscore = 0
while iscore < len(scores):
score = scores[iscore]
new_scores.append(opus2score(to_millisecs(score2opus(score))))
iscore += 1
return new_scores
###########################################################################
def _decode(trackdata=b'', exclude=None, include=None,
event_callback=None, exclusive_event_callback=None, no_eot_magic=False):
r'''Decodes MIDI track data into an opus-style list of events.
The options:
'exclude' is a list of event types which will be ignored SHOULD BE A SET
'include' (and no exclude), makes exclude a list
of all possible events, /minus/ what include specifies
'event_callback' is a coderef
'exclusive_event_callback' is a coderef
'''
trackdata = bytearray(trackdata)
if exclude == None:
exclude = []
if include == None:
include = []
if include and not exclude:
exclude = All_events
include = set(include)
exclude = set(exclude)
# Pointer = 0; not used here; we eat through the bytearray instead.
event_code = -1; # used for running status
event_count = 0;
events = []
while(len(trackdata)):
# loop while there's anything to analyze ...
eot = False # When True, the event registrar aborts this loop
event_count += 1
E = []
# E for events - we'll feed it to the event registrar at the end.
# Slice off the delta time code, and analyze it
[time, remainder] = _unshift_ber_int(trackdata)
# Now let's see what we can make of the command
first_byte = trackdata.pop(0) & 0xFF
if (first_byte < 0xF0): # It's a MIDI event
if (first_byte & 0x80):
event_code = first_byte
else:
# It wants running status; use last event_code value
trackdata.insert(0, first_byte)
if (event_code == -1):
_warn("Running status not set; Aborting track.")
return []
command = event_code & 0xF0
channel = event_code & 0x0F
if (command == 0xF6): # 0-byte argument
pass
elif (command == 0xC0 or command == 0xD0): # 1-byte argument
parameter = trackdata.pop(0) # could be B
else: # 2-byte argument could be BB or 14-bit
parameter = (trackdata.pop(0), trackdata.pop(0))
#################################################################
# MIDI events
if (command == 0x80):
if 'note_off' in exclude:
continue
E = ['note_off', time, channel, parameter[0], parameter[1]]
elif (command == 0x90):
if 'note_on' in exclude:
continue
E = ['note_on', time, channel, parameter[0], parameter[1]]
elif (command == 0xA0):
if 'key_after_touch' in exclude:
continue
E = ['key_after_touch',time,channel,parameter[0],parameter[1]]
elif (command == 0xB0):
if 'control_change' in exclude:
continue
E = ['control_change',time,channel,parameter[0],parameter[1]]
elif (command == 0xC0):
if 'patch_change' in exclude:
continue
E = ['patch_change', time, channel, parameter]
elif (command == 0xD0):
if 'channel_after_touch' in exclude:
continue
E = ['channel_after_touch', time, channel, parameter]
elif (command == 0xE0):
if 'pitch_wheel_change' in exclude:
continue
E = ['pitch_wheel_change', time, channel,
_read_14_bit(parameter)-0x2000]
else:
_warn("Shouldn't get here; command="+hex(command))
elif (first_byte == 0xFF): # It's a Meta-Event! ##################
#[command, length, remainder] =
# unpack("xCwa*", substr(trackdata, $Pointer, 6));
#Pointer += 6 - len(remainder);
# # Move past JUST the length-encoded.
command = trackdata.pop(0) & 0xFF
[length, trackdata] = _unshift_ber_int(trackdata)
if (command == 0x00):
if (length == 2):
E = ['set_sequence_number',time,_twobytes2int(trackdata)]
else:
_warn('set_sequence_number: length must be 2, not '+str(length))
E = ['set_sequence_number', time, 0]
elif command >= 0x01 and command <= 0x0f: # Text events
# 6.2 take it in bytes; let the user get the right encoding.
# text_str = trackdata[0:length].decode('ascii','ignore')
# text_str = trackdata[0:length].decode('ISO-8859-1')
# 6.4 take it in bytes; let the user get the right encoding.
text_data = bytes(trackdata[0:length]) # 6.4
# Defined text events
if (command == 0x01):
E = ['text_event', time, text_data]
elif (command == 0x02):
E = ['copyright_text_event', time, text_data]
elif (command == 0x03):
E = ['track_name', time, text_data]
elif (command == 0x04):
E = ['instrument_name', time, text_data]
elif (command == 0x05):
E = ['lyric', time, text_data]
elif (command == 0x06):
E = ['marker', time, text_data]
elif (command == 0x07):
E = ['cue_point', time, text_data]
# Reserved but apparently unassigned text events
elif (command == 0x08):
E = ['text_event_08', time, text_data]
elif (command == 0x09):
E = ['text_event_09', time, text_data]
elif (command == 0x0a):
E = ['text_event_0a', time, text_data]
elif (command == 0x0b):
E = ['text_event_0b', time, text_data]
elif (command == 0x0c):
E = ['text_event_0c', time, text_data]
elif (command == 0x0d):
E = ['text_event_0d', time, text_data]
elif (command == 0x0e):
E = ['text_event_0e', time, text_data]
elif (command == 0x0f):
E = ['text_event_0f', time, text_data]
# Now the sticky events -------------------------------------
elif (command == 0x2F):
E = ['end_track', time]
# The code for handling this, oddly, comes LATER,
# in the event registrar.
elif (command == 0x51): # DTime, Microseconds/Crochet
if length != 3:
_warn('set_tempo event, but length='+str(length))
E = ['set_tempo', time,
struct.unpack(">I", b'\x00'+trackdata[0:3])[0]]
elif (command == 0x54):
if length != 5: # DTime, HR, MN, SE, FR, FF
_warn('smpte_offset event, but length='+str(length))
E = ['smpte_offset',time] + list(struct.unpack(">BBBBB",trackdata[0:5]))
elif (command == 0x58):
if length != 4: # DTime, NN, DD, CC, BB
_warn('time_signature event, but length='+str(length))
E = ['time_signature', time]+list(trackdata[0:4])
elif (command == 0x59):
if length != 2: # DTime, SF(signed), MI
_warn('key_signature event, but length='+str(length))
E = ['key_signature',time] + list(struct.unpack(">bB",trackdata[0:2]))
elif (command == 0x7F): # 6.4
E = ['sequencer_specific',time, bytes(trackdata[0:length])]
else:
E = ['raw_meta_event', time, command,
bytes(trackdata[0:length])] # 6.0
#"[uninterpretable meta-event command of length length]"
# DTime, Command, Binary Data
# It's uninterpretable; record it as raw_data.
# Pointer += length; # Now move Pointer
trackdata = trackdata[length:]
######################################################################
elif (first_byte == 0xF0 or first_byte == 0xF7):
# Note that sysexes in MIDI /files/ are different than sysexes
# in MIDI transmissions!! The vast majority of system exclusive
# messages will just use the F0 format. For instance, the
# transmitted message F0 43 12 00 07 F7 would be stored in a
# MIDI file as F0 05 43 12 00 07 F7. As mentioned above, it is
# required to include the F7 at the end so that the reader of the
# MIDI file knows that it has read the entire message. (But the F7
# is omitted if this is a non-final block in a multiblock sysex;
# but the F7 (if there) is counted in the message's declared
# length, so we don't have to think about it anyway.)
#command = trackdata.pop(0)
[length, trackdata] = _unshift_ber_int(trackdata)
if first_byte == 0xF0:
# 20091008 added ISO-8859-1 to get an 8-bit str
# 6.4 return bytes instead
E = ['sysex_f0', time, bytes(trackdata[0:length])]
else:
E = ['sysex_f7', time, bytes(trackdata[0:length])]
trackdata = trackdata[length:]
######################################################################
# Now, the MIDI file spec says:
# <track data> = <MTrk event>+
# <MTrk event> = <delta-time> <event>
# <event> = <MIDI event> | <sysex event> | <meta-event>
# I know that, on the wire, <MIDI event> can include note_on,
# note_off, and all the other 8x to Ex events, AND Fx events
# other than F0, F7, and FF -- namely, <song position msg>,
# <song select msg>, and <tune request>.
#
# Whether these can occur in MIDI files is not clear specified
# from the MIDI file spec. So, I'm going to assume that
# they CAN, in practice, occur. I don't know whether it's
# proper for you to actually emit these into a MIDI file.
elif (first_byte == 0xF2): # DTime, Beats
# <song position msg> ::= F2 <data pair>
E = ['song_position', time, _read_14_bit(trackdata[:2])]
trackdata = trackdata[2:]
elif (first_byte == 0xF3): # <song select msg> ::= F3 <data singlet>
# E = ['song_select', time, struct.unpack('>B',trackdata.pop(0))[0]]
E = ['song_select', time, trackdata[0]]
trackdata = trackdata[1:]
# DTime, Thing (what?! song number? whatever ...)
elif (first_byte == 0xF6): # DTime
E = ['tune_request', time]
# What would a tune request be doing in a MIDI /file/?
#########################################################
# ADD MORE META-EVENTS HERE. TODO:
# f1 -- MTC Quarter Frame Message. One data byte follows
# the Status; it's the time code value, from 0 to 127.
# f8 -- MIDI clock. no data.
# fa -- MIDI start. no data.
# fb -- MIDI continue. no data.
# fc -- MIDI stop. no data.
# fe -- Active sense. no data.
# f4 f5 f9 fd -- unallocated
r'''
elif (first_byte > 0xF0) { # Some unknown kinda F-series event ####
# Here we only produce a one-byte piece of raw data.
# But the encoder for 'raw_data' accepts any length of it.
E = [ 'raw_data',
time, substr(trackdata,Pointer,1) ]
# DTime and the Data (in this case, the one Event-byte)
++Pointer; # itself
'''
elif first_byte > 0xF0: # Some unknown F-series event
# Here we only produce a one-byte piece of raw data.
# E = ['raw_data', time, bytest(trackdata[0])] # 6.4
E = ['raw_data', time, trackdata[0]] # 6.4 6.7
trackdata = trackdata[1:]
else: # Fallthru.
_warn("Aborting track. Command-byte first_byte="+hex(first_byte))
break
# End of the big if-group
######################################################################
# THE EVENT REGISTRAR...
if E and (E[0] == 'end_track'):
# This is the code for exceptional handling of the EOT event.
eot = True
if not no_eot_magic:
if E[1] > 0: # a null text-event to carry the delta-time
E = ['text_event', E[1], '']
else:
E = [] # EOT with a delta-time of 0; ignore it.
if E and not (E[0] in exclude):
#if ( $exclusive_event_callback ):
# &{ $exclusive_event_callback }( @E );
#else:
# &{ $event_callback }( @E ) if $event_callback;
events.append(E)
if eot:
break
# End of the big "Event" while-block
return events
###########################################################################
def _encode(events_lol, unknown_callback=None, never_add_eot=False,
no_eot_magic=False, no_running_status=False):
# encode an event structure, presumably for writing to a file
# Calling format:
# $data_r = MIDI::Event::encode( \@event_lol, { options } );
# Takes a REFERENCE to an event structure (a LoL)
# Returns an (unblessed) REFERENCE to track data.
# If you want to use this to encode a /single/ event,
# you still have to do it as a reference to an event structure (a LoL)
# that just happens to have just one event. I.e.,
# encode( [ $event ] ) or encode( [ [ 'note_on', 100, 5, 42, 64] ] )
# If you're doing this, consider the never_add_eot track option, as in
# print MIDI ${ encode( [ $event], { 'never_add_eot' => 1} ) };
data = [] # what I'll store the chunks of byte-data in
# This is so my end_track magic won't corrupt the original
events = copy.deepcopy(events_lol)
if not never_add_eot:
# One way or another, tack on an 'end_track'
if events:
last = events[-1]
if not (last[0] == 'end_track'): # no end_track already
if (last[0] == 'text_event' and len(last[2]) == 0):
# 0-length text event at track-end.
if no_eot_magic:
# Exceptional case: don't mess with track-final
# 0-length text_events; just peg on an end_track
events.append(['end_track', 0])
else:
# NORMAL CASE: replace with an end_track, leaving DTime
last[0] = 'end_track'
else:
# last event was neither 0-length text_event nor end_track
events.append(['end_track', 0])
else: # an eventless track!
events = [['end_track', 0],]
# maybe_running_status = not no_running_status # unused? 4.7
last_status = -1
for event_r in (events):
E = copy.deepcopy(event_r)
# otherwise the shifting'd corrupt the original
if not E:
continue
event = E.pop(0)
if not len(event):
continue
dtime = int(E.pop(0))
# print('event='+str(event)+' dtime='+str(dtime))
event_data = ''
if ( # MIDI events -- eligible for running status
event == 'note_on'
or event == 'note_off'
or event == 'control_change'
or event == 'key_after_touch'
or event == 'patch_change'
or event == 'channel_after_touch'
or event == 'pitch_wheel_change' ):
# This block is where we spend most of the time. Gotta be tight.
if (event == 'note_off'):
status = 0x80 | (int(E[0]) & 0x0F)
parameters = struct.pack('>BB', int(E[1])&0x7F, int(E[2])&0x7F)
elif (event == 'note_on'):
status = 0x90 | (int(E[0]) & 0x0F)
parameters = struct.pack('>BB', int(E[1])&0x7F, int(E[2])&0x7F)
elif (event == 'key_after_touch'):
status = 0xA0 | (int(E[0]) & 0x0F)
parameters = struct.pack('>BB', int(E[1])&0x7F, int(E[2])&0x7F)
elif (event == 'control_change'):
status = 0xB0 | (int(E[0]) & 0x0F)
parameters = struct.pack('>BB', int(E[1])&0xFF, int(E[2])&0xFF)
elif (event == 'patch_change'):
status = 0xC0 | (int(E[0]) & 0x0F)
parameters = struct.pack('>B', int(E[1]) & 0xFF)
elif (event == 'channel_after_touch'):
status = 0xD0 | (int(E[0]) & 0x0F)
parameters = struct.pack('>B', int(E[1]) & 0xFF)
elif (event == 'pitch_wheel_change'):
status = 0xE0 | (int(E[0]) & 0x0F)
parameters = _write_14_bit(int(E[1]) + 0x2000)
else:
_warn("BADASS FREAKOUT ERROR 31415!")
# And now the encoding
# w = BER compressed integer (not ASN.1 BER, see perlpacktut for
# details). Its bytes represent an unsigned integer in base 128,
# most significant digit first, with as few digits as possible.
# Bit eight (the high bit) is set on each byte except the last.
data.append(_ber_compressed_int(dtime))
if (status != last_status) or no_running_status:
data.append(struct.pack('>B', status))
data.append(parameters)
last_status = status
continue
else:
# Not a MIDI event.
# All the code in this block could be more efficient,
# but this is not where the code needs to be tight.
# print "zaz $event\n";
last_status = -1
if event == 'raw_meta_event':
event_data = _some_text_event(int(E[0]), E[1])
elif (event == 'set_sequence_number'): # 3.9
event_data = b'\xFF\x00\x02'+_int2twobytes(E[0])
# Text meta-events...
# a case for a dict, I think (pjb) ...
elif (event == 'text_event'):
event_data = _some_text_event(0x01, E[0])
elif (event == 'copyright_text_event'):
event_data = _some_text_event(0x02, E[0])
elif (event == 'track_name'):
event_data = _some_text_event(0x03, E[0])
elif (event == 'instrument_name'):
event_data = _some_text_event(0x04, E[0])
elif (event == 'lyric'):
event_data = _some_text_event(0x05, E[0])
elif (event == 'marker'):
event_data = _some_text_event(0x06, E[0])
elif (event == 'cue_point'):
event_data = _some_text_event(0x07, E[0])
elif (event == 'text_event_08'):
event_data = _some_text_event(0x08, E[0])
elif (event == 'text_event_09'):
event_data = _some_text_event(0x09, E[0])
elif (event == 'text_event_0a'):
event_data = _some_text_event(0x0A, E[0])
elif (event == 'text_event_0b'):
event_data = _some_text_event(0x0B, E[0])
elif (event == 'text_event_0c'):
event_data = _some_text_event(0x0C, E[0])
elif (event == 'text_event_0d'):
event_data = _some_text_event(0x0D, E[0])
elif (event == 'text_event_0e'):
event_data = _some_text_event(0x0E, E[0])
elif (event == 'text_event_0f'):
event_data = _some_text_event(0x0F, E[0])
# End of text meta-events
elif (event == 'end_track'):
event_data = b"\xFF\x2F\x00"
elif (event == 'set_tempo'):
#event_data = struct.pack(">BBwa*", 0xFF, 0x51, 3,
# substr( struct.pack('>I', E[0]), 1, 3))
event_data = b'\xFF\x51\x03'+struct.pack('>I',E[0])[1:]
elif (event == 'smpte_offset'):
# event_data = struct.pack(">BBwBBBBB", 0xFF, 0x54, 5, E[0:5] )
event_data = struct.pack(">BBBbBBBB", 0xFF,0x54,0x05,E[0],E[1],E[2],E[3],E[4])
elif (event == 'time_signature'):
# event_data = struct.pack(">BBwBBBB", 0xFF, 0x58, 4, E[0:4] )
event_data = struct.pack(">BBBbBBB", 0xFF, 0x58, 0x04, E[0],E[1],E[2],E[3])
elif (event == 'key_signature'):
event_data = struct.pack(">BBBbB", 0xFF, 0x59, 0x02, E[0],E[1])
elif (event == 'sequencer_specific'):
# event_data = struct.pack(">BBwa*", 0xFF,0x7F, len(E[0]), E[0])
event_data = _some_text_event(0x7F, E[0])
# End of Meta-events
# Other Things...
elif (event == 'sysex_f0'):
#event_data = struct.pack(">Bwa*", 0xF0, len(E[0]), E[0])
#B=bitstring w=BER-compressed-integer a=null-padded-ascii-str
event_data = bytearray(b'\xF0')+_ber_compressed_int(len(E[0]))+bytearray(E[0])
elif (event == 'sysex_f7'):
#event_data = struct.pack(">Bwa*", 0xF7, len(E[0]), E[0])
event_data = bytearray(b'\xF7')+_ber_compressed_int(len(E[0]))+bytearray(E[0])
elif (event == 'song_position'):
event_data = b"\xF2" + _write_14_bit( E[0] )
elif (event == 'song_select'):
event_data = struct.pack('>BB', 0xF3, E[0] )
elif (event == 'tune_request'):
event_data = b"\xF6"
elif (event == 'raw_data'):
_warn("_encode: raw_data event not supported")
# event_data = E[0]
continue
# End of Other Stuff
else:
# The Big Fallthru
if unknown_callback:
# push(@data, &{ $unknown_callback }( @$event_r ))
pass
else:
_warn("Unknown event: "+str(event))
# To surpress complaint here, just set
# 'unknown_callback' => sub { return () }
continue
#print "Event $event encoded part 2\n"
if str(type(event_data)).find("'str'") >= 0:
event_data = bytearray(event_data.encode('Latin1', 'ignore'))
if len(event_data): # how could $event_data be empty
# data.append(struct.pack('>wa*', dtime, event_data))
# print(' event_data='+str(event_data))
data.append(_ber_compressed_int(dtime)+event_data)
return b''.join(data)
#===============================================================================
"""
================================================================================
pyFluidSynth
Python bindings for FluidSynth
Copyright 2008, Nathan Whitehead <nwhitehe@gmail.com>
Released under the LGPL
This module contains python bindings for FluidSynth. FluidSynth is a
software synthesizer for generating music. It works like a MIDI
synthesizer. You load patches, set parameters, then send NOTEON and
NOTEOFF events to play notes. Instruments are defined in SoundFonts,
generally files with the extension SF2. FluidSynth can either be used
to play audio itself, or you can call a function that returns chunks
of audio data and output the data to the soundcard yourself.
FluidSynth works on all major platforms, so pyFluidSynth should also.
================================================================================
"""
from ctypes import *
from ctypes.util import find_library
import os
# A short circuited or expression to find the FluidSynth library
# (mostly needed for Windows distributions of libfluidsynth supplied with QSynth)
# DLL search method changed in Python 3.8
# https://docs.python.org/3/library/os.html#os.add_dll_directory
if hasattr(os, 'add_dll_directory'):
os.add_dll_directory(os.getcwd())
lib = find_library('fluidsynth') or \
find_library('libfluidsynth') or \
find_library('libfluidsynth-3') or \
find_library('libfluidsynth-2') or \
find_library('libfluidsynth-1')
if lib is None:
raise ImportError("Couldn't find the FluidSynth library.")
# Dynamically link the FluidSynth library
# Architecture (32-/64-bit) must match your Python version
_fl = CDLL(lib)
# Helper function for declaring function prototypes
def cfunc(name, result, *args):
"""Build and apply a ctypes prototype complete with parameter flags"""
if hasattr(_fl, name):
atypes = []
aflags = []
for arg in args:
atypes.append(arg[1])
aflags.append((arg[2], arg[0]) + arg[3:])
return CFUNCTYPE(result, *atypes)((name, _fl), tuple(aflags))
else: # Handle Fluidsynth 1.x, 2.x, etc. API differences
return None
# Bump this up when changing the interface for users
api_version = '1.3.1'
# Function prototypes for C versions of functions
FLUID_OK = 0
FLUID_FAILED = -1
fluid_version = cfunc('fluid_version', c_void_p,
('major', POINTER(c_int), 1),
('minor', POINTER(c_int), 1),
('micro', POINTER(c_int), 1))
majver = c_int()
fluid_version(majver, c_int(), c_int())
if majver.value > 1:
FLUIDSETTING_EXISTS = FLUID_OK
else:
FLUIDSETTING_EXISTS = 1
# fluid settings
new_fluid_settings = cfunc('new_fluid_settings', c_void_p)
fluid_settings_setstr = cfunc('fluid_settings_setstr', c_int,
('settings', c_void_p, 1),
('name', c_char_p, 1),
('str', c_char_p, 1))
fluid_settings_setnum = cfunc('fluid_settings_setnum', c_int,
('settings', c_void_p, 1),
('name', c_char_p, 1),
('val', c_double, 1))
fluid_settings_setint = cfunc('fluid_settings_setint', c_int,
('settings', c_void_p, 1),
('name', c_char_p, 1),
('val', c_int, 1))
fluid_settings_copystr = cfunc('fluid_settings_copystr', c_int,
('settings', c_void_p, 1),
('name', c_char_p, 1),
('str', c_char_p, 1),
('len', c_int, 1))
fluid_settings_getnum = cfunc('fluid_settings_getnum', c_int,
('settings', c_void_p, 1),
('name', c_char_p, 1),
('val', POINTER(c_double), 1))
fluid_settings_getint = cfunc('fluid_settings_getint', c_int,
('settings', c_void_p, 1),
('name', c_char_p, 1),
('val', POINTER(c_int), 1))
delete_fluid_settings = cfunc('delete_fluid_settings', None,
('settings', c_void_p, 1))
fluid_synth_activate_key_tuning = cfunc('fluid_synth_activate_key_tuning', c_int,
('synth', c_void_p, 1),
('bank', c_int, 1),
('prog', c_int, 1),
('name', c_char_p, 1),
('pitch', POINTER(c_double), 1),
('apply', c_int, 1))
fluid_synth_activate_tuning = cfunc('fluid_synth_activate_tuning', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1),
('bank', c_int, 1),
('prog', c_int, 1),
('apply', c_int, 1))
fluid_synth_deactivate_tuning = cfunc('fluid_synth_deactivate_tuning', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1),
('apply', c_int, 1))
fluid_synth_tuning_dump = cfunc('fluid_synth_tuning_dump', c_int,
('synth', c_void_p, 1),
('bank', c_int, 1),
('prog', c_int, 1),
('name', c_char_p, 1),
('length', c_int, 1),
('pitch', POINTER(c_double), 1))
# fluid synth
new_fluid_synth = cfunc('new_fluid_synth', c_void_p,
('settings', c_void_p, 1))
delete_fluid_synth = cfunc('delete_fluid_synth', None,
('synth', c_void_p, 1))
fluid_synth_sfload = cfunc('fluid_synth_sfload', c_int,
('synth', c_void_p, 1),
('filename', c_char_p, 1),
('update_midi_presets', c_int, 1))
fluid_synth_sfunload = cfunc('fluid_synth_sfunload', c_int,
('synth', c_void_p, 1),
('sfid', c_int, 1),
('update_midi_presets', c_int, 1))
fluid_synth_program_select = cfunc('fluid_synth_program_select', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1),
('sfid', c_int, 1),
('bank', c_int, 1),
('preset', c_int, 1))
fluid_synth_noteon = cfunc('fluid_synth_noteon', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1),
('key', c_int, 1),
('vel', c_int, 1))
fluid_synth_noteoff = cfunc('fluid_synth_noteoff', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1),
('key', c_int, 1))
fluid_synth_pitch_bend = cfunc('fluid_synth_pitch_bend', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1),
('val', c_int, 1))
fluid_synth_cc = cfunc('fluid_synth_cc', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1),
('ctrl', c_int, 1),
('val', c_int, 1))
fluid_synth_get_cc = cfunc('fluid_synth_get_cc', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1),
('num', c_int, 1),
('pval', POINTER(c_int), 1))
fluid_synth_program_change = cfunc('fluid_synth_program_change', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1),
('prg', c_int, 1))
fluid_synth_unset_program = cfunc('fluid_synth_unset_program', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1))
fluid_synth_get_program = cfunc('fluid_synth_get_program', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1),
('sfont_id', POINTER(c_int), 1),
('bank_num', POINTER(c_int), 1),
('preset_num', POINTER(c_int), 1))
fluid_synth_bank_select = cfunc('fluid_synth_bank_select', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1),
('bank', c_int, 1))
fluid_synth_sfont_select = cfunc('fluid_synth_sfont_select', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1),
('sfid', c_int, 1))
fluid_synth_program_reset = cfunc('fluid_synth_program_reset', c_int,
('synth', c_void_p, 1))
fluid_synth_system_reset = cfunc('fluid_synth_system_reset', c_int,
('synth', c_void_p, 1))
fluid_synth_write_s16 = cfunc('fluid_synth_write_s16', c_void_p,
('synth', c_void_p, 1),
('len', c_int, 1),
('lbuf', c_void_p, 1),
('loff', c_int, 1),
('lincr', c_int, 1),
('rbuf', c_void_p, 1),
('roff', c_int, 1),
('rincr', c_int, 1))
fluid_synth_all_notes_off = cfunc('fluid_synth_all_notes_off', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1))
fluid_synth_all_sounds_off = cfunc('fluid_synth_all_sounds_off', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1))
class fluid_synth_channel_info_t(Structure):
_fields_ = [
('assigned', c_int),
('sfont_id', c_int),
('bank', c_int),
('program', c_int),
('name', c_char*32),
('reserved', c_char*32)]
fluid_synth_get_channel_info = cfunc('fluid_synth_get_channel_info', c_int,
('synth', c_void_p, 1),
('chan', c_int, 1),
('info', POINTER(fluid_synth_channel_info_t), 1))
fluid_synth_set_reverb_full = cfunc('fluid_synth_set_reverb_full', c_int,
('synth', c_void_p, 1),
('set', c_int, 1),
('roomsize', c_double, 1),
('damping', c_double, 1),
('width', c_double, 1),
('level', c_double, 1))
fluid_synth_set_chorus_full = cfunc('fluid_synth_set_chorus_full', c_int,
('synth', c_void_p, 1),
('set', c_int, 1),
('nr', c_int, 1),
('level', c_double, 1),
('speed', c_double, 1),
('depth_ms', c_double, 1),
('type', c_int, 1))
fluid_synth_set_reverb = cfunc('fluid_synth_set_reverb', c_int,
('synth', c_void_p, 1),
('roomsize', c_double, 1),
('damping', c_double, 1),
('width', c_double, 1),
('level', c_double, 1))
fluid_synth_set_chorus = cfunc('fluid_synth_set_chorus', c_int,
('synth', c_void_p, 1),
('nr', c_int, 1),
('level', c_double, 1),
('speed', c_double, 1),
('depth_ms', c_double, 1),
('type', c_int, 1))
fluid_synth_set_reverb_roomsize = cfunc('fluid_synth_set_reverb_roomsize', c_int,
('synth', c_void_p, 1),
('roomsize', c_double, 1))
fluid_synth_set_reverb_damp = cfunc('fluid_synth_set_reverb_damp', c_int,
('synth', c_void_p, 1),
('damping', c_double, 1))
fluid_synth_set_reverb_level = cfunc('fluid_synth_set_reverb_level', c_int,
('synth', c_void_p, 1),
('level', c_double, 1))
fluid_synth_set_reverb_width = cfunc('fluid_synth_set_reverb_width', c_int,
('synth', c_void_p, 1),
('width', c_double, 1))
fluid_synth_set_chorus_nr = cfunc('fluid_synth_set_chorus_nr', c_int,
('synth', c_void_p, 1),
('nr', c_int, 1))
fluid_synth_set_chorus_level = cfunc('fluid_synth_set_chorus_level', c_int,
('synth', c_void_p, 1),
('level', c_double, 1))
fluid_synth_set_chorus_type = cfunc('fluid_synth_set_chorus_type', c_int,
('synth', c_void_p, 1),
('type', c_int, 1))
fluid_synth_get_reverb_roomsize = cfunc('fluid_synth_get_reverb_roomsize', c_double,
('synth', c_void_p, 1))
fluid_synth_get_reverb_damp = cfunc('fluid_synth_get_reverb_damp', c_double,
('synth', c_void_p, 1))
fluid_synth_get_reverb_level = cfunc('fluid_synth_get_reverb_level', c_double,
('synth', c_void_p, 1))
fluid_synth_get_reverb_width = cfunc('fluid_synth_get_reverb_width', c_double,
('synth', c_void_p, 1))
fluid_synth_get_chorus_nr = cfunc('fluid_synth_get_chorus_nr', c_int,
('synth', c_void_p, 1))
fluid_synth_get_chorus_level = cfunc('fluid_synth_get_chorus_level', c_double,
('synth', c_void_p, 1))
fluid_synth_get_chorus_speed_Hz = cfunc('fluid_synth_get_chorus_speed_Hz', c_double,
('synth', c_void_p, 1))
fluid_synth_get_chorus_depth_ms = cfunc('fluid_synth_get_chorus_depth_ms', c_double,
('synth', c_void_p, 1))
fluid_synth_get_chorus_type = cfunc('fluid_synth_get_chorus_type', c_int,
('synth', c_void_p, 1))
fluid_synth_set_midi_router = cfunc('fluid_synth_set_midi_router', None,
('synth', c_void_p, 1),
('router', c_void_p, 1))
fluid_synth_handle_midi_event = cfunc('fluid_synth_handle_midi_event', c_int,
('data', c_void_p, 1),
('event', c_void_p, 1))
# fluid sequencer
new_fluid_sequencer2 = cfunc('new_fluid_sequencer2', c_void_p,
('use_system_timer', c_int, 1))
fluid_sequencer_process = cfunc('fluid_sequencer_process', None,
('seq', c_void_p, 1),
('msec', c_uint, 1))
fluid_sequencer_register_fluidsynth = cfunc('fluid_sequencer_register_fluidsynth', c_short,
('seq', c_void_p, 1),
('synth', c_void_p, 1))
fluid_sequencer_register_client = cfunc('fluid_sequencer_register_client', c_short,
('seq', c_void_p, 1),
('name', c_char_p, 1),
('callback', CFUNCTYPE(None, c_uint, c_void_p, c_void_p, c_void_p), 1),
('data', c_void_p, 1))
fluid_sequencer_get_tick = cfunc('fluid_sequencer_get_tick', c_uint,
('seq', c_void_p, 1))
fluid_sequencer_set_time_scale = cfunc('fluid_sequencer_set_time_scale', None,
('seq', c_void_p, 1),
('scale', c_double, 1))
fluid_sequencer_get_time_scale = cfunc('fluid_sequencer_get_time_scale', c_double,
('seq', c_void_p, 1))
fluid_sequencer_send_at = cfunc('fluid_sequencer_send_at', c_int,
('seq', c_void_p, 1),
('evt', c_void_p, 1),
('time', c_uint, 1),
('absolute', c_int, 1))
delete_fluid_sequencer = cfunc('delete_fluid_sequencer', None,
('seq', c_void_p, 1))
# fluid event
new_fluid_event = cfunc('new_fluid_event', c_void_p)
fluid_event_set_source = cfunc('fluid_event_set_source', None,
('evt', c_void_p, 1),
('src', c_void_p, 1))
fluid_event_set_dest = cfunc('fluid_event_set_dest', None,
('evt', c_void_p, 1),
('dest', c_void_p, 1))
fluid_event_timer = cfunc('fluid_event_timer', None,
('evt', c_void_p, 1),
('data', c_void_p, 1))
fluid_event_note = cfunc('fluid_event_note', None,
('evt', c_void_p, 1),
('channel', c_int, 1),
('key', c_short, 1),
('vel', c_short, 1),
('duration', c_uint, 1))
fluid_event_noteon = cfunc('fluid_event_noteon', None,
('evt', c_void_p, 1),
('channel', c_int, 1),
('key', c_short, 1),
('vel', c_short, 1))
fluid_event_noteoff = cfunc('fluid_event_noteoff', None,
('evt', c_void_p, 1),
('channel', c_int, 1),
('key', c_short, 1))
delete_fluid_event = cfunc('delete_fluid_event', None,
('evt', c_void_p, 1))
fluid_midi_event_get_channel = cfunc('fluid_midi_event_get_channel', c_int,
('evt', c_void_p, 1))
fluid_midi_event_get_control = cfunc('fluid_midi_event_get_control', c_int,
('evt', c_void_p, 1))
fluid_midi_event_get_program = cfunc('fluid_midi_event_get_program', c_int,
('evt', c_void_p, 1))
fluid_midi_event_get_key = cfunc('fluid_midi_event_get_key', c_int,
('evt', c_void_p, 1))
fluid_midi_event_get_type = cfunc('fluid_midi_event_get_type', c_int,
('evt', c_void_p, 1))
fluid_midi_event_get_value = cfunc('fluid_midi_event_get_value', c_int,
('evt', c_void_p, 1))
fluid_midi_event_get_velocity = cfunc('fluid_midi_event_get_velocity', c_int,
('evt', c_void_p, 1))
# fluid_player_status returned by fluid_player_get_status()
FLUID_PLAYER_READY = 0
FLUID_PLAYER_PLAYING = 1
FLUID_PLAYER_STOPPING = 2
FLUID_PLAYER_DONE = 3
# tempo_type used by fluid_player_set_tempo()
FLUID_PLAYER_TEMPO_INTERNAL = 0
FLUID_PLAYER_TEMPO_EXTERNAL_BPM = 1
FLUID_PLAYER_TEMPO_EXTERNAL_MIDI = 2
new_fluid_player = cfunc('new_fluid_player', c_void_p,
('synth', c_void_p, 1))
delete_fluid_player = cfunc('delete_fluid_player', None,
('player', c_void_p, 1))
fluid_player_add = cfunc('fluid_player_add', c_int,
('player', c_void_p, 1),
('filename', c_char_p, 1))
fluid_player_get_status = cfunc('fluid_player_get_status', c_int,
('player', c_void_p, 1))
fluid_player_join = cfunc('fluid_player_join', c_int,
('player', c_void_p, 1))
fluid_player_play = cfunc('fluid_player_play', c_int,
('player', c_void_p, 1))
fluid_player_set_playback_callback = cfunc('fluid_player_set_playback_callback', c_int,
('player', c_void_p, 1),
('handler', CFUNCTYPE(c_int, c_void_p, c_void_p), 1),
('event_handler_data', c_void_p, 1))
fluid_player_set_tempo = cfunc('fluid_player_set_tempo', c_int,
('player', c_void_p, 1),
('tempo_type', c_int, 1),
('tempo', c_double, 1))
fluid_player_seek = cfunc('fluid_player_seek', c_int,
('player', c_void_p, 1),
('ticks', c_int, 1))
fluid_player_stop = cfunc('fluid_player_stop', c_int,
('player', c_void_p, 1))
# fluid audio driver
new_fluid_audio_driver = cfunc('new_fluid_audio_driver', c_void_p,
('settings', c_void_p, 1),
('synth', c_void_p, 1))
delete_fluid_audio_driver = cfunc('delete_fluid_audio_driver', None,
('driver', c_void_p, 1))
# fluid midi driver
new_fluid_midi_driver = cfunc('new_fluid_midi_driver', c_void_p,
('settings', c_void_p, 1),
('handler', CFUNCTYPE(c_int, c_void_p, c_void_p), 1),
('event_handler_data', c_void_p, 1))
# fluid midi router rule
class fluid_midi_router_t(Structure):
_fields_ = [
('synth', c_void_p),
('rules_mutex', c_void_p),
('rules', c_void_p*6),
('free_rules', c_void_p),
('event_handler', c_void_p),
('event_handler_data', c_void_p),
('nr_midi_channels', c_int),
('cmd_rule', c_void_p),
('cmd_rule_type', POINTER(c_int))]
delete_fluid_midi_router_rule = cfunc('delete_fluid_midi_router_rule', c_int,
('rule', c_void_p, 1))
new_fluid_midi_router_rule = cfunc('new_fluid_midi_router_rule', c_void_p)
fluid_midi_router_rule_set_chan = cfunc('fluid_midi_router_rule_set_chan', None,
('rule', c_void_p, 1),
('min', c_int, 1),
('max', c_int, 1),
('mul', c_float, 1),
('add', c_int, 1))
fluid_midi_router_rule_set_param1 = cfunc('fluid_midi_router_rule_set_param1', None,
('rule', c_void_p, 1),
('min', c_int, 1),
('max', c_int, 1),
('mul', c_float, 1),
('add', c_int, 1))
fluid_midi_router_rule_set_param2 = cfunc('fluid_midi_router_rule_set_param2', None,
('rule', c_void_p, 1),
('min', c_int, 1),
('max', c_int, 1),
('mul', c_float, 1),
('add', c_int, 1))
# fluid midi router
new_fluid_midi_router = cfunc('new_fluid_midi_router', POINTER(fluid_midi_router_t),
('settings', c_void_p, 1),
('handler', CFUNCTYPE(c_int, c_void_p, c_void_p), 1),
('event_handler_data', c_void_p, 1))
fluid_midi_router_handle_midi_event = cfunc('fluid_midi_router_handle_midi_event', c_int,
('data', c_void_p, 1),
('event', c_void_p, 1))
fluid_midi_router_clear_rules = cfunc('fluid_midi_router_clear_rules', c_int,
('router', POINTER(fluid_midi_router_t), 1))
fluid_midi_router_set_default_rules = cfunc('fluid_midi_router_set_default_rules', c_int,
('router', POINTER(fluid_midi_router_t), 1))
fluid_midi_router_add_rule = cfunc('fluid_midi_router_add_rule', c_int,
('router', POINTER(fluid_midi_router_t), 1),
('rule', c_void_p, 1),
('type', c_int, 1))
# fluidsynth 2.x
new_fluid_cmd_handler=cfunc('new_fluid_cmd_handler', c_void_p,
('synth', c_void_p, 1),
('router', c_void_p, 1))
fluid_synth_get_sfont_by_id = cfunc('fluid_synth_get_sfont_by_id', c_void_p,
('synth', c_void_p, 1),
('id', c_int, 1))
fluid_sfont_get_preset = cfunc('fluid_sfont_get_preset', c_void_p,
('sfont', c_void_p, 1),
('banknum', c_int, 1),
('prenum', c_int, 1))
fluid_preset_get_name = cfunc('fluid_preset_get_name', c_char_p,
('preset', c_void_p, 1))
fluid_synth_set_reverb = cfunc('fluid_synth_set_reverb', c_int,
('synth', c_void_p, 1),
('roomsize', c_double, 1),
('damping', c_double, 1),
('width', c_double, 1),
('level', c_double, 1))
fluid_synth_set_chorus = cfunc('fluid_synth_set_chorus', c_int,
('synth', c_void_p, 1),
('nr', c_int, 1),
('level', c_double, 1),
('speed', c_double, 1),
('depth_ms', c_double, 1),
('type', c_int, 1))
fluid_synth_get_chorus_speed = cfunc('fluid_synth_get_chorus_speed', c_double,
('synth', c_void_p, 1))
fluid_synth_get_chorus_depth = cfunc('fluid_synth_get_chorus_depth', c_double,
('synth', c_void_p, 1))
def fluid_synth_write_s16_stereo(synth, len):
"""Return generated samples in stereo 16-bit format
Return value is a Numpy array of samples.
"""
import numpy
buf = create_string_buffer(len * 4)
fluid_synth_write_s16(synth, len, buf, 0, 2, buf, 1, 2)
return numpy.frombuffer(buf[:], dtype=numpy.int16)
# Object-oriented interface, simplifies access to functions
class Synth:
"""Synth represents a FluidSynth synthesizer"""
def __init__(self, gain=0.2, samplerate=44100, channels=256, **kwargs):
"""Create new synthesizer object to control sound generation
Optional keyword arguments:
gain : scale factor for audio output, default is 0.2
lower values are quieter, allow more simultaneous notes
samplerate : output samplerate in Hz, default is 44100 Hz
added capability for passing arbitrary fluid settings using args
"""
self.settings = new_fluid_settings()
self.setting('synth.gain', gain)
self.setting('synth.sample-rate', float(samplerate))
self.setting('synth.midi-channels', channels)
for opt,val in kwargs.items():
self.setting(opt, val)
self.synth = new_fluid_synth(self.settings)
self.audio_driver = None
self.midi_driver = None
self.router = None
def setting(self, opt, val):
"""change an arbitrary synth setting, type-smart"""
if isinstance(val, (str, bytes)):
fluid_settings_setstr(self.settings, opt.encode(), val.encode())
elif isinstance(val, int):
fluid_settings_setint(self.settings, opt.encode(), val)
elif isinstance(val, float):
fluid_settings_setnum(self.settings, opt.encode(), c_double(val))
def get_setting(self, opt):
"""get current value of an arbitrary synth setting"""
val = c_int()
if fluid_settings_getint(self.settings, opt.encode(), byref(val)) == FLUIDSETTING_EXISTS:
return val.value
strval = create_string_buffer(32)
if fluid_settings_copystr(self.settings, opt.encode(), strval, 32) == FLUIDSETTING_EXISTS:
return strval.value.decode()
num = c_double()
if fluid_settings_getnum(self.settings, opt.encode(), byref(num)) == FLUIDSETTING_EXISTS:
return round(num.value, 6)
return None
def start(self, driver=None, device=None, midi_driver=None, midi_router=None):
"""Start audio output driver in separate background thread
Call this function any time after creating the Synth object.
If you don't call this function, use get_samples() to generate
samples.
Optional keyword argument:
driver : which audio driver to use for output
device : the device to use for audio output
midi_driver : the midi driver to use for communicating with midi devices
see http://www.fluidsynth.org/api/fluidsettings.xml for allowed values and defaults by platform
"""
driver = driver or self.get_setting('audio.driver')
device = device or self.get_setting('audio.%s.device' % driver)
midi_driver = midi_driver or self.get_setting('midi.driver')
self.setting('audio.driver', driver)
self.setting('audio.%s.device' % driver, device)
self.audio_driver = new_fluid_audio_driver(self.settings, self.synth)
self.setting('midi.driver', midi_driver)
self.router = new_fluid_midi_router(self.settings, fluid_synth_handle_midi_event, self.synth)
if new_fluid_cmd_handler:
new_fluid_cmd_handler(self.synth, self.router)
else:
fluid_synth_set_midi_router(self.synth, self.router)
if midi_router == None: ## Use fluidsynth to create a MIDI event handler
self.midi_driver = new_fluid_midi_driver(self.settings, fluid_midi_router_handle_midi_event, self.router)
self.custom_router_callback = None
else: ## Supply an external MIDI event handler
self.custom_router_callback = CFUNCTYPE(c_int, c_void_p, c_void_p)(midi_router)
self.midi_driver = new_fluid_midi_driver(self.settings, self.custom_router_callback, self.router)
return FLUID_OK
def delete(self):
if self.audio_driver:
delete_fluid_audio_driver(self.audio_driver)
delete_fluid_synth(self.synth)
delete_fluid_settings(self.settings)
def sfload(self, filename, update_midi_preset=0):
"""Load SoundFont and return its ID"""
return fluid_synth_sfload(self.synth, filename.encode(), update_midi_preset)
def sfunload(self, sfid, update_midi_preset=0):
"""Unload a SoundFont and free memory it used"""
return fluid_synth_sfunload(self.synth, sfid, update_midi_preset)
def program_select(self, chan, sfid, bank, preset):
"""Select a program"""
return fluid_synth_program_select(self.synth, chan, sfid, bank, preset)
def program_unset(self, chan):
"""Set the preset of a MIDI channel to an unassigned state"""
return fluid_synth_unset_program(self.synth, chan)
def channel_info(self, chan):
"""get soundfont, bank, prog, preset name of channel"""
if fluid_synth_get_channel_info is not None:
info=fluid_synth_channel_info_t()
fluid_synth_get_channel_info(self.synth, chan, byref(info))
return (info.sfont_id, info.bank, info.program, info.name)
else:
(sfontid, banknum, presetnum) = self.program_info(chan)
presetname = self.sfpreset_name(sfontid, banknum, presetnum)
return (sfontid, banknum, presetnum, presetname)
def program_info(self, chan):
"""get active soundfont, bank, prog on a channel"""
if fluid_synth_get_program is not None:
sfontid=c_int()
banknum=c_int()
presetnum=c_int()
fluid_synth_get_program(self.synth, chan, byref(sfontid), byref(banknum), byref(presetnum))
return (sfontid.value, banknum.value, presetnum.value)
else:
(sfontid, banknum, prognum, presetname) = self.channel_info(chan)
return (sfontid, banknum, prognum)
def sfpreset_name(self, sfid, bank, prenum):
"""Return name of a soundfont preset"""
if fluid_synth_get_sfont_by_id is not None:
sfont=fluid_synth_get_sfont_by_id(self.synth, sfid)
preset=fluid_sfont_get_preset(sfont, bank, prenum)
if not preset:
return None
return fluid_preset_get_name(preset).decode('ascii')
else:
(sfontid, banknum, presetnum, presetname) = self.channel_info(chan)
return presetname
def router_clear(self):
if self.router is not None:
fluid_midi_router_clear_rules(self.router)
def router_default(self):
if self.router is not None:
fluid_midi_router_set_default_rules(self.router)
def router_begin(self, type):
"""types are [note|cc|prog|pbend|cpress|kpress]"""
if self.router is not None:
if type=='note':
self.router.cmd_rule_type=0
elif type=='cc':
self.router.cmd_rule_type=1
elif type=='prog':
self.router.cmd_rule_type=2
elif type=='pbend':
self.router.cmd_rule_type=3
elif type=='cpress':
self.router.cmd_rule_type=4
elif type=='kpress':
self.router.cmd_rule_type=5
if 'self.router.cmd_rule' in globals():
delete_fluid_midi_router_rule(self.router.cmd_rule)
self.router.cmd_rule = new_fluid_midi_router_rule()
def router_end(self):
if self.router is not None:
if self.router.cmd_rule is None:
return
if fluid_midi_router_add_rule(self.router, self.router.cmd_rule, self.router.cmd_rule_type)<0:
delete_fluid_midi_router_rule(self.router.cmd_rule)
self.router.cmd_rule=None
def router_chan(self, min, max, mul, add):
if self.router is not None:
fluid_midi_router_rule_set_chan(self.router.cmd_rule, min, max, mul, add)
def router_par1(self, min, max, mul, add):
if self.router is not None:
fluid_midi_router_rule_set_param1(self.router.cmd_rule, min, max, mul, add)
def router_par2(self, min, max, mul, add):
if self.router is not None:
fluid_midi_router_rule_set_param2(self.router.cmd_rule, min, max, mul, add)
def set_reverb(self, roomsize=-1.0, damping=-1.0, width=-1.0, level=-1.0):
"""
roomsize Reverb room size value (0.0-1.0)
damping Reverb damping value (0.0-1.0)
width Reverb width value (0.0-100.0)
level Reverb level value (0.0-1.0)
"""
if fluid_synth_set_reverb is not None:
return fluid_synth_set_reverb(self.synth, roomsize, damping, width, level)
else:
set=0
if roomsize>=0:
set+=0b0001
if damping>=0:
set+=0b0010
if width>=0:
set+=0b0100
if level>=0:
set+=0b1000
return fluid_synth_set_reverb_full(self.synth, set, roomsize, damping, width, level)
def set_chorus(self, nr=-1, level=-1.0, speed=-1.0, depth=-1.0, type=-1):
"""
nr Chorus voice count (0-99, CPU time consumption proportional to this value)
level Chorus level (0.0-10.0)
speed Chorus speed in Hz (0.29-5.0)
depth_ms Chorus depth (max value depends on synth sample rate, 0.0-21.0 is safe for sample rate values up to 96KHz)
type Chorus waveform type (0=sine, 1=triangle)
"""
if fluid_synth_set_chorus is not None:
return fluid_synth_set_chorus(self.synth, nr, level, speed, depth, type)
else:
set=0
if nr>=0:
set+=0b00001
if level>=0:
set+=0b00010
if speed>=0:
set+=0b00100
if depth>=0:
set+=0b01000
if type>=0:
set+=0b10000
return fluid_synth_set_chorus_full(self.synth, set, nr, level, speed, depth, type)
def set_reverb_roomsize(self, roomsize):
if fluid_synth_set_reverb_roomsize is not None:
return fluid_synth_set_reverb_roomsize(self.synth, roomsize)
else:
return self.set_reverb(roomsize=roomsize)
def set_reverb_damp(self, damping):
if fluid_synth_set_reverb_damp is not None:
return fluid_synth_set_reverb_damp(self.synth, damping)
else:
return self.set_reverb(damping=damping)
def set_reverb_level(self, level):
if fluid_synth_set_reverb_level is not None:
return fluid_synth_set_reverb_level(self.synth, level)
else:
return self.set_reverb(level=level)
def set_reverb_width(self, width):
if fluid_synth_set_reverb_width is not None:
return fluid_synth_set_reverb_width(self.synth, width)
else:
return self.set_reverb(width=width)
def set_chorus_nr(self, nr):
if fluid_synth_set_chorus_nr is not None:
return fluid_synth_set_chorus_nr(self.synth, nr)
else:
return self.set_chorus(nr=nr)
def set_chorus_level(self, level):
if fluid_synth_set_chorus_level is not None:
return fluid_synth_set_chorus_level(self.synth, level)
else:
return self.set_chorus(leve=level)
def set_chorus_speed(self, speed):
if fluid_synth_set_chorus_speed is not None:
return fluid_synth_set_chorus_speed(self.synth, speed)
else:
return self.set_chorus(speed=speed)
def set_chorus_depth(self, depth):
if fluid_synth_set_chorus_depth is not None:
return fluid_synth_set_chorus_depth(self.synth, depth)
else:
return self.set_chorus(depth=depth)
def set_chorus_type(self, type):
if fluid_synth_set_chorus_type is not None:
return fluid_synth_set_chorus_type(self.synth, type)
else:
return self.set_chorus(type=type)
def get_reverb_roomsize(self):
return fluid_synth_get_reverb_roomsize(self.synth)
def get_reverb_damp(self):
return fluid_synth_get_reverb_damp(self.synth)
def get_reverb_level(self):
return fluid_synth_get_reverb_level(self.synth)
def get_reverb_width(self):
return fluid_synth_get_reverb_width(self.synth)
def get_chorus_nr(self):
return fluid_synth_get_chorus_nr(self.synth)
def get_chorus_level(self):
return fluid_synth_get_reverb_level(self.synth)
def get_chorus_speed(self):
if fluid_synth_get_chorus_speed is not None:
return fluid_synth_get_chorus_speed(self.synth)
else:
return fluid_synth_get_chorus_speed_Hz(self.synth)
def get_chorus_depth(self):
if fluid_synth_get_chorus_depth is not None:
return fluid_synth_get_chorus_depth(self.synth)
else:
return fluid_synth_get_chorus_depth_ms(self.synth)
def get_chorus_type(self):
return fluid_synth_get_chorus_type(self.synth)
def noteon(self, chan, key, vel):
"""Play a note"""
if key < 0 or key > 127:
return False
if chan < 0:
return False
if vel < 0 or vel > 127:
return False
return fluid_synth_noteon(self.synth, chan, key, vel)
def noteoff(self, chan, key):
"""Stop a note"""
if key < 0 or key > 127:
return False
if chan < 0:
return False
return fluid_synth_noteoff(self.synth, chan, key)
def pitch_bend(self, chan, val):
"""Adjust pitch of a playing channel by small amounts
A pitch bend value of 0 is no pitch change from default.
A value of -2048 is 1 semitone down.
A value of 2048 is 1 semitone up.
Maximum values are -8192 to +8192 (transposing by 4 semitones).
"""
return fluid_synth_pitch_bend(self.synth, chan, val + 8192)
def cc(self, chan, ctrl, val):
"""Send control change value
The controls that are recognized are dependent on the
SoundFont. Values are always 0 to 127. Typical controls
include:
1 : vibrato
7 : volume
10 : pan (left to right)
11 : expression (soft to loud)
64 : sustain
91 : reverb
93 : chorus
"""
return fluid_synth_cc(self.synth, chan, ctrl, val)
def get_cc(self, chan, num):
i=c_int()
fluid_synth_get_cc(self.synth, chan, num, byref(i))
return i.value
def program_change(self, chan, prg):
"""Change the program"""
return fluid_synth_program_change(self.synth, chan, prg)
def bank_select(self, chan, bank):
"""Choose a bank"""
return fluid_synth_bank_select(self.synth, chan, bank)
def all_notes_off(self, chan):
"""Turn off all notes on a channel (release all keys)"""
return fluid_synth_all_notes_off(self.synth, chan)
def all_sounds_off(self, chan):
"""Turn off all sounds on a channel (equivalent to mute)"""
return fluid_synth_all_sounds_off(self.synth, chan)
def sfont_select(self, chan, sfid):
"""Choose a SoundFont"""
return fluid_synth_sfont_select(self.synth, chan, sfid)
def program_reset(self):
"""Reset the programs on all channels"""
return fluid_synth_program_reset(self.synth)
def system_reset(self):
"""Stop all notes and reset all programs"""
return fluid_synth_system_reset(self.synth)
def get_samples(self, len=1024):
"""Generate audio samples
The return value will be a NumPy array containing the given
length of audio samples. If the synth is set to stereo output
(the default) the array will be size 2 * len.
"""
return fluid_synth_write_s16_stereo(self.synth, len)
def tuning_dump(self, bank, prog, pitch):
return fluid_synth_tuning_dump(self.synth, bank, prog, name.encode(), length(name), pitch)
def midi_event_get_type(self, event):
return fluid_midi_event_get_type(event)
def midi_event_get_velocity(self, event):
return fluid_midi_event_get_velocity(event)
def midi_event_get_key(self, event):
return fluid_midi_event_get_key(event)
def midi_event_get_channel(self, event):
return fluid_midi_event_get_channel(event)
def midi_event_get_control(self, event):
return fluid_midi_event_get_control(event)
def midi_event_get_program(self, event):
return fluid_midi_event_get_program(event)
def midi_event_get_value(self, event):
return fluid_midi_event_get_value(event)
def play_midi_file(self, filename):
self.player = new_fluid_player(self.synth)
if self.player == None: return FLUID_FAILED
if self.custom_router_callback != None:
fluid_player_set_playback_callback(self.player, self.custom_router_callback, self.synth)
status = fluid_player_add(self.player, filename.encode())
if status == FLUID_FAILED: return status
status = fluid_player_play(self.player)
return status
def play_midi_stop(self):
status = fluid_player_stop(self.player)
if status == FLUID_FAILED: return status
status = fluid_player_seek(self.player, 0)
delete_fluid_player(self.player)
return status
def player_set_tempo(self, tempo_type, tempo):
return fluid_player_set_tempo(self.player, tempo_type, tempo)
class Sequencer:
def __init__(self, time_scale=1000, use_system_timer=True):
"""Create new sequencer object to control and schedule timing of midi events
Optional keyword arguments:
time_scale: ticks per second, defaults to 1000
use_system_timer: whether the sequencer should advance by itself
"""
self.client_callbacks = []
self.sequencer = new_fluid_sequencer2(use_system_timer)
fluid_sequencer_set_time_scale(self.sequencer, time_scale)
def register_fluidsynth(self, synth):
response = fluid_sequencer_register_fluidsynth(self.sequencer, synth.synth)
if response == FLUID_FAILED:
raise Error("Registering fluid synth failed")
return response
def register_client(self, name, callback, data=None):
c_callback = CFUNCTYPE(None, c_uint, c_void_p, c_void_p, c_void_p)(callback)
response = fluid_sequencer_register_client(self.sequencer, name.encode(), c_callback, data)
if response == FLUID_FAILED:
raise Error("Registering client failed")
# store in a list to prevent garbage collection
self.client_callbacks.append(c_callback)
return response
def note(self, time, channel, key, velocity, duration, source=-1, dest=-1, absolute=True):
evt = self._create_event(source, dest)
fluid_event_note(evt, channel, key, velocity, duration)
self._schedule_event(evt, time, absolute)
delete_fluid_event(evt)
def note_on(self, time, channel, key, velocity=127, source=-1, dest=-1, absolute=True):
evt = self._create_event(source, dest)
fluid_event_noteon(evt, channel, key, velocity)
self._schedule_event(evt, time, absolute)
delete_fluid_event(evt)
def note_off(self, time, channel, key, source=-1, dest=-1, absolute=True):
evt = self._create_event(source, dest)
fluid_event_noteoff(evt, channel, key)
self._schedule_event(evt, time, absolute)
delete_fluid_event(evt)
def timer(self, time, data=None, source=-1, dest=-1, absolute=True):
evt = self._create_event(source, dest)
fluid_event_timer(evt, data)
self._schedule_event(evt, time, absolute)
delete_fluid_event(evt)
def _create_event(self, source=-1, dest=-1):
evt = new_fluid_event()
fluid_event_set_source(evt, source)
fluid_event_set_dest(evt, dest)
return evt
def _schedule_event(self, evt, time, absolute=True):
response = fluid_sequencer_send_at(self.sequencer, evt, time, absolute)
if response == FLUID_FAILED:
raise Error("Scheduling event failed")
def get_tick(self):
return fluid_sequencer_get_tick(self.sequencer)
def process(self, msec):
fluid_sequencer_process(self.sequencer, msec)
def delete(self):
delete_fluid_sequencer(self.sequencer)
def raw_audio_string(data):
"""Return a string of bytes to send to soundcard
Input is a numpy array of samples. Default output format
is 16-bit signed (other formats not currently supported).
"""
import numpy
return (data.astype(numpy.int16)).tostring()
#===============================================================================
import numpy as np
import wave
def midi_opus_to_colab_audio(midi_opus,
soundfont_path='/usr/share/sounds/sf2/FluidR3_GM.sf2',
sample_rate=16000, # 44100
volume_scale=10,
trim_silence=True,
silence_threshold=0.1,
output_for_gradio=False,
write_audio_to_WAV=''
):
def normalize_volume(matrix, factor=10):
norm = np.linalg.norm(matrix)
matrix = matrix/norm # normalized matrix
mult_matrix = matrix * factor
final_matrix = np.clip(mult_matrix, -1.0, 1.0)
return final_matrix
if midi_opus[1]:
ticks_per_beat = midi_opus[0]
event_list = []
for track_idx, track in enumerate(midi_opus[1:]):
abs_t = 0
for event in track:
abs_t += event[1]
event_new = [*event]
event_new[1] = abs_t
event_list.append(event_new)
event_list = sorted(event_list, key=lambda e: e[1])
tempo = int((60 / 120) * 10 ** 6) # default 120 bpm
ss = np.empty((0, 2), dtype=np.int16)
fl = Synth(samplerate=float(sample_rate))
sfid = fl.sfload(soundfont_path)
last_t = 0
for c in range(16):
fl.program_select(c, sfid, 128 if c == 9 else 0, 0)
for event in event_list:
name = event[0]
sample_len = int(((event[1] / ticks_per_beat) * tempo / (10 ** 6)) * sample_rate)
sample_len -= int(((last_t / ticks_per_beat) * tempo / (10 ** 6)) * sample_rate)
last_t = event[1]
if sample_len > 0:
sample = fl.get_samples(sample_len).reshape(sample_len, 2)
ss = np.concatenate([ss, sample])
if name == "set_tempo":
tempo = event[2]
elif name == "patch_change":
c, p = event[2:4]
fl.program_select(c, sfid, 128 if c == 9 else 0, p)
elif name == "control_change":
c, cc, v = event[2:5]
fl.cc(c, cc, v)
elif name == "note_on" and event[3] > 0:
c, p, v = event[2:5]
fl.noteon(c, p, v)
elif name == "note_off" or (name == "note_on" and event[3] == 0):
c, p = event[2:4]
fl.noteoff(c, p)
fl.delete()
if ss.shape[0] > 0:
max_val = np.abs(ss).max()
if max_val != 0:
ss = (ss / max_val) * np.iinfo(np.int16).max
ss = ss.astype(np.int16)
if trim_silence:
threshold = np.std(np.abs(ss)) * silence_threshold
exceeded_thresh = np.abs(ss) > threshold
if np.any(exceeded_thresh):
last_idx = np.where(exceeded_thresh)[0][-1]
ss = ss[:last_idx+1]
if output_for_gradio:
return ss
ss = ss.swapaxes(1, 0)
raw_audio = normalize_volume(ss, volume_scale)
if write_audio_to_WAV != '':
r_audio = raw_audio.T
r_audio = np.int16(r_audio / np.max(np.abs(r_audio)) * 32767)
with wave.open(write_audio_to_WAV, 'w') as wf:
wf.setframerate(sample_rate)
wf.setsampwidth(2)
wf.setnchannels(r_audio.shape[1])
wf.writeframes(r_audio)
return raw_audio
else:
return None
def midi_to_colab_audio(midi_file,
soundfont_path='/usr/share/sounds/sf2/FluidR3_GM.sf2',
sample_rate=16000, # 44100
volume_scale=10,
trim_silence=True,
silence_threshold=0.1,
output_for_gradio=False,
write_audio_to_WAV=False
):
'''
Returns raw audio to pass to IPython.disaply.Audio func
Example usage:
from IPython.display import Audio
display(Audio(raw_audio, rate=16000, normalize=False))
'''
def normalize_volume(matrix, factor=10):
norm = np.linalg.norm(matrix)
matrix = matrix/norm # normalized matrix
mult_matrix = matrix * factor
final_matrix = np.clip(mult_matrix, -1.0, 1.0)
return final_matrix
midi_opus = midi2opus(open(midi_file, 'rb').read())
if midi_opus[1]:
ticks_per_beat = midi_opus[0]
event_list = []
for track_idx, track in enumerate(midi_opus[1:]):
abs_t = 0
for event in track:
abs_t += event[1]
event_new = [*event]
event_new[1] = abs_t
event_list.append(event_new)
event_list = sorted(event_list, key=lambda e: e[1])
tempo = int((60 / 120) * 10 ** 6) # default 120 bpm
ss = np.empty((0, 2), dtype=np.int16)
fl = Synth(samplerate=float(sample_rate))
sfid = fl.sfload(soundfont_path)
last_t = 0
for c in range(16):
fl.program_select(c, sfid, 128 if c == 9 else 0, 0)
for event in event_list:
name = event[0]
sample_len = int(((event[1] / ticks_per_beat) * tempo / (10 ** 6)) * sample_rate)
sample_len -= int(((last_t / ticks_per_beat) * tempo / (10 ** 6)) * sample_rate)
last_t = event[1]
if sample_len > 0:
sample = fl.get_samples(sample_len).reshape(sample_len, 2)
ss = np.concatenate([ss, sample])
if name == "set_tempo":
tempo = event[2]
elif name == "patch_change":
c, p = event[2:4]
fl.program_select(c, sfid, 128 if c == 9 else 0, p)
elif name == "control_change":
c, cc, v = event[2:5]
fl.cc(c, cc, v)
elif name == "note_on" and event[3] > 0:
c, p, v = event[2:5]
fl.noteon(c, p, v)
elif name == "note_off" or (name == "note_on" and event[3] == 0):
c, p = event[2:4]
fl.noteoff(c, p)
fl.delete()
if ss.shape[0] > 0:
max_val = np.abs(ss).max()
if max_val != 0:
ss = (ss / max_val) * np.iinfo(np.int16).max
ss = ss.astype(np.int16)
if trim_silence:
threshold = np.std(np.abs(ss)) * silence_threshold
exceeded_thresh = np.abs(ss) > threshold
if np.any(exceeded_thresh):
last_idx = np.where(exceeded_thresh)[0][-1]
ss = ss[:last_idx+1]
if output_for_gradio:
return ss
ss = ss.swapaxes(1, 0)
raw_audio = normalize_volume(ss, volume_scale)
if write_audio_to_WAV:
filename = midi_file.split('.')[-2] + '.wav'
r_audio = raw_audio.T
r_audio = np.int16(r_audio / np.max(np.abs(r_audio)) * 32767)
with wave.open(filename, 'w') as wf:
wf.setframerate(sample_rate)
wf.setsampwidth(2)
wf.setnchannels(r_audio.shape[1])
wf.writeframes(r_audio)
return raw_audio
else:
return None
#=================================================================================================================== |