[AT3P] PQF implementation

M=16 perfect reconstruction polyphase quadrature analysis filter bank

1 files changed, 132 insertions, 0 deletions

diff --git a/src/atrac/atrac3plus_pqf/atrac3plus_pqf_data.h b/src/atrac/atrac3plus_pqf/atrac3plus_pqf_data.h
new file mode 100644
index 0000000..c83720c
--- /dev/null
+++ b/src/atrac/atrac3plus_pqf/atrac3plus_pqf_data.h
@@ -0,0 +1,132 @@
+/*
+ * This file is part of AtracDEnc.
+ *
+ * AtracDEnc is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * AtracDEnc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with AtracDEnc; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef ATRAC3PLUSPQFDATA_H
+#define ATRAC3PLUSPQFDATA_H
+
+#define ATRAC3P_PQF_FIR_LEN 12
+
+/*
+ * Borrowed from FFmpeg
+ */
+
+/* First half of the 384-tap IPQF filtering coefficients. */
+static const float ff_ipqf_coeffs1[ATRAC3P_PQF_FIR_LEN][16] = {
+    { -5.8336207e-7,    -8.0604229e-7,    -4.2005411e-7,    -4.4400572e-8,
+       3.226247e-8,      3.530856e-8,      1.2660377e-8,     0.000010516783,
+      -0.000011838618,   6.005389e-7,      0.0000014333754,  0.0000023108685,
+       0.0000032569742,  0.0000046192422,  0.0000063894258,  0.0000070302972 },
+    { -0.0000091622824, -0.000010502935,  -0.0000079212787, -0.0000041712024,
+      -0.0000026336629, -0.0000015432918, -5.7168614e-7,     0.0000018111954,
+       0.000023530851,   0.00002780562,    0.000032302323,   0.000036968919,
+       0.000041575615,   0.000045337845,   0.000046043948,   0.000048585582 },
+    { -0.000064464548,  -0.000068306952,  -0.000073081472,  -0.00007612785,
+      -0.000074850752,  -0.000070208509,  -0.000062285151,  -0.000058270442,
+      -0.000056296329,  -0.000049888811,  -0.000035615325,  -0.000018532943,
+       0.0000016657353,  0.00002610587,    0.000053397067,   0.00008079566 },
+    { -0.00054488552,   -0.00052537228,   -0.00049731287,   -0.00045778,
+      -0.00040612387,   -0.00034301577,   -0.00026866337,   -0.00018248901,
+      -0.000084307925,   0.000025081157,   0.00014135583,    0.00026649953,
+       0.00039945057,    0.00053928449,    0.00068422867,    0.00083093712 },
+    { -0.0014771431,    -0.001283227,     -0.0010566821,    -0.00079780724,
+      -0.00050782406,   -0.00018855913,    0.00015771533,    0.00052769453,
+       0.00091862219,    0.001326357,      0.0017469483,     0.0021754825,
+       0.0026067684,     0.0030352892,     0.0034549395,     0.0038591374 },
+    { -0.0022995141,    -0.001443546,     -0.00049266568,    0.00055068987,
+       0.001682895,      0.0028992873,     0.0041943151,     0.0055614738,
+       0.0069935122,     0.0084823566,     0.010018963,      0.011593862,
+       0.013196872,      0.014817309,      0.016444042,      0.018065533 },
+    { -0.034426283,     -0.034281436,     -0.033992987,     -0.033563249,
+      -0.032995768,     -0.032295227,     -0.031467363,     -0.030518902,
+      -0.02945766,      -0.028291954,     -0.027031265,     -0.025685543,
+      -0.024265358,     -0.022781773,     -0.021246184,     -0.019670162 },
+    { -0.0030586775,    -0.0037203205,    -0.0042847847,    -0.0047529764,
+      -0.0051268316,    -0.0054091476,    -0.0056034233,    -0.005714261,
+      -0.0057445862,    -0.0057025906,    -0.0055920109,    -0.0054194843,
+      -0.0051914565,    -0.0049146507,    -0.0045959447,    -0.0042418269 },
+    { -0.0016376863,    -0.0017651899,    -0.0018608454,    -0.0019252141,
+      -0.0019593791,    -0.0019653172,    -0.0019450618,    -0.0018990048,
+      -0.00183808,      -0.0017501717,    -0.0016481078,    -0.0015320742,
+      -0.0014046903,    -0.0012685474,    -0.001125814,     -0.00097943726 },
+    { -0.00055432378,   -0.00055472925,   -0.00054783461,   -0.00053276919,
+      -0.00051135791,   -0.00048466062,   -0.00045358928,   -0.00042499689,
+      -0.00036942671,   -0.0003392619,    -0.00030001783,   -0.00025986304,
+      -0.0002197204,    -0.00018116167,   -0.00014691355,   -0.00011279432 },
+    { -0.000064147389,  -0.00006174868,   -0.000054267788,  -0.000047133824,
+      -0.000042927582,  -0.000039477309,  -0.000036340745,  -0.000029687517,
+      -0.000049787737,  -0.000041577889,  -0.000033864744,  -0.000026534748,
+      -0.000019841305,  -0.000014789486,  -0.000013131184,  -0.0000099198869 },
+    { -0.0000062990207, -0.0000072701259, -0.000011984052,  -0.000017348082,
+      -0.000019907106,  -0.000021348773,  -0.000021961965,  -0.000012203576,
+      -0.000010840992,   4.6299544e-7,     5.2588763e-7,     2.7792686e-7,
+      -2.3649704e-7,    -0.0000010897784, -9.171448e-7,     -5.22682e-7 }
+};
+
+/* Second half of the 384-tap IPQF filtering coefficients. */
+static const float ff_ipqf_coeffs2[ATRAC3P_PQF_FIR_LEN][16] = {
+    {  5.22682e-7,       9.171448e-7,      0.0000010897784,  2.3649704e-7,
+      -2.7792686e-7,    -5.2588763e-7,    -4.6299544e-7,     0.000010840992,
+      -0.000012203576,  -0.000021961965,  -0.000021348773,  -0.000019907106,
+      -0.000017348082,  -0.000011984052,  -0.0000072701259, -0.0000062990207 },
+    {  0.0000099198869,  0.000013131184,   0.000014789486,   0.000019841305,
+       0.000026534748,   0.000033864744,   0.000041577889,   0.000049787737,
+      -0.000029687517,  -0.000036340745,  -0.000039477309,  -0.000042927582,
+      -0.000047133824,  -0.000054267788,  -0.00006174868,   -0.000064147389 },
+    {  0.00011279432,    0.00014691355,    0.00018116167,    0.0002197204,
+       0.00025986304,    0.00030001783,    0.0003392619,     0.00036942671,
+      -0.00042499689,   -0.00045358928,   -0.00048466062,   -0.00051135791,
+      -0.00053276919,   -0.00054783461,   -0.00055472925,   -0.00055432378 },
+    {  0.00097943726,    0.001125814,      0.0012685474,     0.0014046903,
+       0.0015320742,     0.0016481078,     0.0017501717,     0.00183808,
+      -0.0018990048,    -0.0019450618,    -0.0019653172,    -0.0019593791,
+      -0.0019252141,    -0.0018608454,    -0.0017651899,    -0.0016376863 },
+    {  0.0042418269,     0.0045959447,     0.0049146507,     0.0051914565,
+       0.0054194843,     0.0055920109,     0.0057025906,     0.0057445862,
+      -0.005714261,     -0.0056034233,    -0.0054091476,    -0.0051268316,
+      -0.0047529764,    -0.0042847847,    -0.0037203205,    -0.0030586775 },
+    {  0.019670162,      0.021246184,      0.022781773,      0.024265358,
+       0.025685543,      0.027031265,      0.028291954,      0.02945766,
+      -0.030518902,     -0.031467363,     -0.032295227,     -0.032995768,
+      -0.033563249,     -0.033992987,     -0.034281436,     -0.034426283 },
+    { -0.018065533,     -0.016444042,     -0.014817309,     -0.013196872,
+      -0.011593862,     -0.010018963,     -0.0084823566,    -0.0069935122,
+       0.0055614738,     0.0041943151,     0.0028992873,     0.001682895,
+       0.00055068987,   -0.00049266568,   -0.001443546,     -0.0022995141 },
+    { -0.0038591374,    -0.0034549395,    -0.0030352892,    -0.0026067684,
+      -0.0021754825,    -0.0017469483,    -0.001326357,     -0.00091862219,
+       0.00052769453,    0.00015771533,   -0.00018855913,   -0.00050782406,
+      -0.00079780724,   -0.0010566821,    -0.001283227,     -0.0014771431 },
+    { -0.00083093712,   -0.00068422867,   -0.00053928449,   -0.00039945057,
+      -0.00026649953,   -0.00014135583,   -0.000025081157,   0.000084307925,
+      -0.00018248901,   -0.00026866337,   -0.00034301577,   -0.00040612387,
+      -0.00045778,      -0.00049731287,   -0.00052537228,   -0.00054488552 },
+    { -0.00008079566,   -0.000053397067,  -0.00002610587,   -0.0000016657353,
+       0.000018532943,   0.000035615325,   0.000049888811,   0.000056296329,
+      -0.000058270442,  -0.000062285151,  -0.000070208509,  -0.000074850752,
+      -0.00007612785,   -0.000073081472,  -0.000068306952,  -0.000064464548 },
+    { -0.000048585582,  -0.000046043948,  -0.000045337845,  -0.000041575615,
+      -0.000036968919,  -0.000032302323,  -0.00002780562,   -0.000023530851,
+       0.0000018111954, -5.7168614e-7,    -0.0000015432918, -0.0000026336629,
+      -0.0000041712024, -0.0000079212787, -0.000010502935,  -0.0000091622824 },
+    { -0.0000070302972, -0.0000063894258, -0.0000046192422, -0.0000032569742,
+      -0.0000023108685, -0.0000014333754, -6.005389e-7,      0.000011838618,
+       0.000010516783,   1.2660377e-8,     3.530856e-8,      3.226247e-8,
+      -4.4400572e-8,    -4.2005411e-7,    -8.0604229e-7,    -5.8336207e-7 }
+};
+
+#endif