+/** pow(10, i / 16.0) for i in -60..95 */
+static const float pow_tab[] = {
+ 1.7782794100389e-04, 2.0535250264571e-04,
+ 2.3713737056617e-04, 2.7384196342644e-04,
+ 3.1622776601684e-04, 3.6517412725484e-04,
+ 4.2169650342858e-04, 4.8696752516586e-04,
+ 5.6234132519035e-04, 6.4938163157621e-04,
+ 7.4989420933246e-04, 8.6596432336006e-04,
+ 1.0000000000000e-03, 1.1547819846895e-03,
+ 1.3335214321633e-03, 1.5399265260595e-03,
+ 1.7782794100389e-03, 2.0535250264571e-03,
+ 2.3713737056617e-03, 2.7384196342644e-03,
+ 3.1622776601684e-03, 3.6517412725484e-03,
+ 4.2169650342858e-03, 4.8696752516586e-03,
+ 5.6234132519035e-03, 6.4938163157621e-03,
+ 7.4989420933246e-03, 8.6596432336006e-03,
+ 1.0000000000000e-02, 1.1547819846895e-02,
+ 1.3335214321633e-02, 1.5399265260595e-02,
+ 1.7782794100389e-02, 2.0535250264571e-02,
+ 2.3713737056617e-02, 2.7384196342644e-02,
+ 3.1622776601684e-02, 3.6517412725484e-02,
+ 4.2169650342858e-02, 4.8696752516586e-02,
+ 5.6234132519035e-02, 6.4938163157621e-02,
+ 7.4989420933246e-02, 8.6596432336007e-02,
+ 1.0000000000000e-01, 1.1547819846895e-01,
+ 1.3335214321633e-01, 1.5399265260595e-01,
+ 1.7782794100389e-01, 2.0535250264571e-01,
+ 2.3713737056617e-01, 2.7384196342644e-01,
+ 3.1622776601684e-01, 3.6517412725484e-01,
+ 4.2169650342858e-01, 4.8696752516586e-01,
+ 5.6234132519035e-01, 6.4938163157621e-01,
+ 7.4989420933246e-01, 8.6596432336007e-01,
+ 1.0000000000000e+00, 1.1547819846895e+00,
+ 1.3335214321633e+00, 1.5399265260595e+00,
+ 1.7782794100389e+00, 2.0535250264571e+00,
+ 2.3713737056617e+00, 2.7384196342644e+00,
+ 3.1622776601684e+00, 3.6517412725484e+00,
+ 4.2169650342858e+00, 4.8696752516586e+00,
+ 5.6234132519035e+00, 6.4938163157621e+00,
+ 7.4989420933246e+00, 8.6596432336007e+00,
+ 1.0000000000000e+01, 1.1547819846895e+01,
+ 1.3335214321633e+01, 1.5399265260595e+01,
+ 1.7782794100389e+01, 2.0535250264571e+01,
+ 2.3713737056617e+01, 2.7384196342644e+01,
+ 3.1622776601684e+01, 3.6517412725484e+01,
+ 4.2169650342858e+01, 4.8696752516586e+01,
+ 5.6234132519035e+01, 6.4938163157621e+01,
+ 7.4989420933246e+01, 8.6596432336007e+01,
+ 1.0000000000000e+02, 1.1547819846895e+02,
+ 1.3335214321633e+02, 1.5399265260595e+02,
+ 1.7782794100389e+02, 2.0535250264571e+02,
+ 2.3713737056617e+02, 2.7384196342644e+02,
+ 3.1622776601684e+02, 3.6517412725484e+02,
+ 4.2169650342858e+02, 4.8696752516586e+02,
+ 5.6234132519035e+02, 6.4938163157621e+02,
+ 7.4989420933246e+02, 8.6596432336007e+02,
+ 1.0000000000000e+03, 1.1547819846895e+03,
+ 1.3335214321633e+03, 1.5399265260595e+03,
+ 1.7782794100389e+03, 2.0535250264571e+03,
+ 2.3713737056617e+03, 2.7384196342644e+03,
+ 3.1622776601684e+03, 3.6517412725484e+03,
+ 4.2169650342858e+03, 4.8696752516586e+03,
+ 5.6234132519035e+03, 6.4938163157621e+03,
+ 7.4989420933246e+03, 8.6596432336007e+03,
+ 1.0000000000000e+04, 1.1547819846895e+04,
+ 1.3335214321633e+04, 1.5399265260595e+04,
+ 1.7782794100389e+04, 2.0535250264571e+04,
+ 2.3713737056617e+04, 2.7384196342644e+04,
+ 3.1622776601684e+04, 3.6517412725484e+04,
+ 4.2169650342858e+04, 4.8696752516586e+04,
+ 5.6234132519035e+04, 6.4938163157621e+04,
+ 7.4989420933246e+04, 8.6596432336007e+04,
+ 1.0000000000000e+05, 1.1547819846895e+05,
+ 1.3335214321633e+05, 1.5399265260595e+05,
+ 1.7782794100389e+05, 2.0535250264571e+05,
+ 2.3713737056617e+05, 2.7384196342644e+05,
+ 3.1622776601684e+05, 3.6517412725484e+05,
+ 4.2169650342858e+05, 4.8696752516586e+05,
+ 5.6234132519035e+05, 6.4938163157621e+05,
+ 7.4989420933246e+05, 8.6596432336007e+05,
+};
+
+/**
+ * decode exponents coded with VLC codes
+ */
+static int decode_exp_vlc(WMACodecContext *s, int ch)