Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* Copyright (C) 2006 Jean-Marc Valin |
| 2 | File: window.c |
| 3 | |
| 4 | Redistribution and use in source and binary forms, with or without |
| 5 | modification, are permitted provided that the following conditions |
| 6 | are met: |
| 7 | |
| 8 | - Redistributions of source code must retain the above copyright |
| 9 | notice, this list of conditions and the following disclaimer. |
| 10 | |
| 11 | - Redistributions in binary form must reproduce the above copyright |
| 12 | notice, this list of conditions and the following disclaimer in the |
| 13 | documentation and/or other materials provided with the distribution. |
| 14 | |
| 15 | - Neither the name of the Xiph.org Foundation nor the names of its |
| 16 | contributors may be used to endorse or promote products derived from |
| 17 | this software without specific prior written permission. |
| 18 | |
| 19 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 20 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 21 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 22 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
| 23 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 24 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 25 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 26 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 27 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 28 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 29 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #ifdef HAVE_CONFIG_H |
| 33 | #include "config.h" |
| 34 | #endif |
| 35 | |
| 36 | #include "arch.h" |
| 37 | |
| 38 | #ifdef FIXED_POINT |
| 39 | const spx_word16_t lag_window[11] = { |
| 40 | 16384, 16337, 16199, 15970, 15656, 15260, 14790, 14254, 13659, 13015, 12330 |
| 41 | }; |
| 42 | |
| 43 | const spx_word16_t lpc_window[200] = { |
| 44 | 1310, 1313, 1321, 1333, 1352, 1375, 1403, 1436, |
| 45 | 1475, 1518, 1567, 1621, 1679, 1743, 1811, 1884, |
| 46 | 1962, 2044, 2132, 2224, 2320, 2421, 2526, 2636, |
| 47 | 2750, 2868, 2990, 3116, 3246, 3380, 3518, 3659, |
| 48 | 3804, 3952, 4104, 4259, 4417, 4578, 4742, 4909, |
| 49 | 5079, 5251, 5425, 5602, 5781, 5963, 6146, 6331, |
| 50 | 6518, 6706, 6896, 7087, 7280, 7473, 7668, 7863, |
| 51 | 8059, 8256, 8452, 8650, 8847, 9044, 9241, 9438, |
| 52 | 9635, 9831, 10026, 10220, 10414, 10606, 10797, 10987, |
| 53 | 11176, 11363, 11548, 11731, 11912, 12091, 12268, 12443, |
| 54 | 12615, 12785, 12952, 13116, 13277, 13435, 13590, 13742, |
| 55 | 13890, 14035, 14176, 14314, 14448, 14578, 14704, 14826, |
| 56 | 14944, 15058, 15168, 15273, 15374, 15470, 15562, 15649, |
| 57 | 15732, 15810, 15883, 15951, 16015, 16073, 16127, 16175, |
| 58 | 16219, 16257, 16291, 16319, 16342, 16360, 16373, 16381, |
| 59 | 16384, 16384, 16384, 16384, 16384, 16384, 16384, 16384, |
| 60 | 16384, 16384, 16384, 16384, 16384, 16384, 16384, 16384, |
| 61 | 16384, 16384, 16384, 16384, 16384, 16384, 16384, 16384, |
| 62 | 16384, 16384, 16384, 16384, 16384, 16384, 16384, 16384, |
| 63 | 16384, 16384, 16384, 16384, 16384, 16384, 16384, 16384, |
| 64 | 16384, 16384, 16384, 16384, 16384, 16384, 16384, 16384, |
| 65 | 16384, 16384, 16384, 16361, 16294, 16183, 16028, 15830, |
| 66 | 15588, 15304, 14979, 14613, 14207, 13763, 13282, 12766, |
| 67 | 12215, 11631, 11016, 10373, 9702, 9007, 8289, 7551, |
| 68 | 6797, 6028, 5251, 4470, 3695, 2943, 2248, 1696 |
| 69 | }; |
| 70 | #else |
| 71 | const spx_word16_t lag_window[11] = { |
| 72 | 1.00000, 0.99716, 0.98869, 0.97474, 0.95554, 0.93140, 0.90273, 0.86998, 0.83367, 0.79434, 0.75258 |
| 73 | }; |
| 74 | |
| 75 | const spx_word16_t lpc_window[200] = { |
| 76 | 0.080000f, 0.080158f, 0.080630f, 0.081418f, 0.082520f, 0.083935f, 0.085663f, 0.087703f, |
| 77 | 0.090052f, 0.092710f, 0.095674f, 0.098943f, 0.102514f, 0.106385f, 0.110553f, 0.115015f, |
| 78 | 0.119769f, 0.124811f, 0.130137f, 0.135744f, 0.141628f, 0.147786f, 0.154212f, 0.160902f, |
| 79 | 0.167852f, 0.175057f, 0.182513f, 0.190213f, 0.198153f, 0.206328f, 0.214731f, 0.223357f, |
| 80 | 0.232200f, 0.241254f, 0.250513f, 0.259970f, 0.269619f, 0.279453f, 0.289466f, 0.299651f, |
| 81 | 0.310000f, 0.320507f, 0.331164f, 0.341965f, 0.352901f, 0.363966f, 0.375151f, 0.386449f, |
| 82 | 0.397852f, 0.409353f, 0.420943f, 0.432615f, 0.444361f, 0.456172f, 0.468040f, 0.479958f, |
| 83 | 0.491917f, 0.503909f, 0.515925f, 0.527959f, 0.540000f, 0.552041f, 0.564075f, 0.576091f, |
| 84 | 0.588083f, 0.600042f, 0.611960f, 0.623828f, 0.635639f, 0.647385f, 0.659057f, 0.670647f, |
| 85 | 0.682148f, 0.693551f, 0.704849f, 0.716034f, 0.727099f, 0.738035f, 0.748836f, 0.759493f, |
| 86 | 0.770000f, 0.780349f, 0.790534f, 0.800547f, 0.810381f, 0.820030f, 0.829487f, 0.838746f, |
| 87 | 0.847800f, 0.856643f, 0.865269f, 0.873672f, 0.881847f, 0.889787f, 0.897487f, 0.904943f, |
| 88 | 0.912148f, 0.919098f, 0.925788f, 0.932214f, 0.938372f, 0.944256f, 0.949863f, 0.955189f, |
| 89 | 0.960231f, 0.964985f, 0.969447f, 0.973615f, 0.977486f, 0.981057f, 0.984326f, 0.987290f, |
| 90 | 0.989948f, 0.992297f, 0.994337f, 0.996065f, 0.997480f, 0.998582f, 0.999370f, 0.999842f, |
| 91 | 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, |
| 92 | 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, |
| 93 | 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, |
| 94 | 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, |
| 95 | 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, |
| 96 | 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, 1.000000f, |
| 97 | 1.000000f, 1.000000f, 1.000000f, 0.998640f, 0.994566f, 0.987787f, 0.978324f, 0.966203f, |
| 98 | 0.951458f, 0.934131f, 0.914270f, 0.891931f, 0.867179f, 0.840084f, 0.810723f, 0.779182f, |
| 99 | 0.745551f, 0.709930f, 0.672424f, 0.633148f, 0.592223f, 0.549781f, 0.505964f, 0.460932f, |
| 100 | 0.414863f, 0.367968f, 0.320511f, 0.272858f, 0.225569f, 0.179655f, 0.137254f, 0.103524f |
| 101 | }; |
| 102 | #endif |