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1 /* |
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2 * LIBOIL - Library of Optimized Inner Loops |
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3 * Copyright (c) 2001,2003,2004 David A. Schleef <ds@schleef.org> |
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4 * All rights reserved. |
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5 * |
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6 * Redistribution and use in source and binary forms, with or without |
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7 * modification, are permitted provided that the following conditions |
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8 * are met: |
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9 * 1. Redistributions of source code must retain the above copyright |
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10 * notice, this list of conditions and the following disclaimer. |
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11 * 2. Redistributions in binary form must reproduce the above copyright |
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12 * notice, this list of conditions and the following disclaimer in the |
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13 * documentation and/or other materials provided with the distribution. |
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14 * |
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15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
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19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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25 * POSSIBILITY OF SUCH DAMAGE. |
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26 */ |
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27 //Portions Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. |
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28 |
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29 #ifdef HAVE_CONFIG_H |
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30 #include "config.h" |
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31 #endif |
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32 #include <liboil/liboilfunction.h> |
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33 #include "conv.h" |
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34 |
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35 #include <math.h> |
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36 |
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37 |
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38 static void |
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39 conv_f64_s16_table(double *dest, int dest_stride, const short *src, |
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40 int src_stride, int n) |
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41 { |
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42 static double ints_high[256]; |
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43 static double ints_low[256]; |
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44 static int init = 0; |
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45 int i; |
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46 unsigned int idx; |
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47 if(!init){ |
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48 for(i=0;i<256;i++){ |
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49 ints_high[i]=256.0*((i<128)?i:i-256); |
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50 ints_low[i]=i; |
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51 } |
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52 init = 1; |
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53 } |
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54 |
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55 if(n&1){ |
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56 idx = (unsigned short)*src; |
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57 *dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)]; |
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58 OIL_INCREMENT(dest, dest_stride); |
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59 OIL_INCREMENT(src, src_stride); |
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60 n-=1; |
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61 } |
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62 for(i=0;i<n;i+=2){ |
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63 idx = (unsigned short)*src; |
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64 *dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)]; |
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65 OIL_INCREMENT(dest, dest_stride); |
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66 OIL_INCREMENT(src, src_stride); |
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67 idx = (unsigned short)*src; |
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68 *dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)]; |
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69 OIL_INCREMENT(dest, dest_stride); |
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70 OIL_INCREMENT(src, src_stride); |
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71 } |
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72 } |
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73 OIL_DEFINE_IMPL(conv_f64_s16_table, conv_f64_s16); |
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74 |
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75 static void |
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76 conv_f32_s16_table(float *dest, int dest_stride, const short *src, |
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77 int src_stride, int n) |
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78 { |
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79 static float ints_high[256]; |
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80 static float ints_low[256]; |
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81 static int init = 0; |
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82 int i; |
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83 unsigned int idx; |
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84 if(!init){ |
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85 for(i=0;i<256;i++){ |
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86 ints_high[i]=256.0*((i<128)?i:i-256); |
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87 ints_low[i]=i; |
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88 } |
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89 init = 1; |
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90 } |
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91 |
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92 if(n&1){ |
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93 idx = (unsigned short)*src; |
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94 *dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)]; |
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95 OIL_INCREMENT(dest, dest_stride); |
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96 OIL_INCREMENT(src, src_stride); |
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97 n-=1; |
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98 } |
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99 for(i=0;i<n;i+=2){ |
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100 idx = (unsigned short)*src; |
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101 *dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)]; |
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102 OIL_INCREMENT(dest, dest_stride); |
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103 OIL_INCREMENT(src, src_stride); |
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104 idx = (unsigned short)*src; |
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105 *dest = ints_high[(idx>>8)] + ints_low[(idx&0xff)]; |
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106 OIL_INCREMENT(dest, dest_stride); |
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107 OIL_INCREMENT(src, src_stride); |
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108 } |
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109 } |
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110 OIL_DEFINE_IMPL(conv_f32_s16_table, conv_f32_s16); |
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111 |
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112 |
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113 |
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114 |
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115 |
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116 #ifdef __SYMBIAN32__ |
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117 |
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118 OilFunctionImpl* __oil_function_impl_conv_f64_s16_table() { |
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119 return &_oil_function_impl_conv_f64_s16_table; |
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120 } |
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121 #endif |
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122 |
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123 #ifdef __SYMBIAN32__ |
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124 |
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125 OilFunctionImpl* __oil_function_impl_conv_f32_s16_table() { |
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126 return &_oil_function_impl_conv_f32_s16_table; |
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127 } |
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128 #endif |
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129 |