third_party/speex/libspeex/window.c

   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