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Diffstat (limited to 'media/libeffects/lvm/lib/Eq/src/LVEQNB_Tables.c')
| -rwxr-xr-x | media/libeffects/lvm/lib/Eq/src/LVEQNB_Tables.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/media/libeffects/lvm/lib/Eq/src/LVEQNB_Tables.c b/media/libeffects/lvm/lib/Eq/src/LVEQNB_Tables.c new file mode 100755 index 0000000..33c07da --- /dev/null +++ b/media/libeffects/lvm/lib/Eq/src/LVEQNB_Tables.c @@ -0,0 +1,203 @@ +/* + * Copyright (C) 2004-2010 NXP Software + * Copyright (C) 2010 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/************************************************************************************ + + $Author: beq07716 $ + $Revision: 1005 $ + $Date: 2010-06-28 13:58:28 +0200 (Mon, 28 Jun 2010) $ + +*************************************************************************************/ + + +/************************************************************************************/ +/* */ +/* Includes */ +/* */ +/************************************************************************************/ + +#include "LVEQNB.h" +#include "LVEQNB_Coeffs.h" + + +/************************************************************************************/ +/* */ +/* Sample rate table */ +/* */ +/************************************************************************************/ + +/* + * Sample rate table for converting between the enumerated type and the actual + * frequency + */ +const LVM_UINT16 LVEQNB_SampleRateTab[] = {8000, /* 8kS/s */ + 11025, + 12000, + 16000, + 22050, + 24000, + 32000, + 44100, + 48000}; /* 48kS/s */ + + +/************************************************************************************/ +/* */ +/* Coefficient calculation tables */ +/* */ +/************************************************************************************/ + +/* + * Table for 2 * Pi / Fs + */ +const LVM_INT16 LVEQNB_TwoPiOnFsTable[] = {LVEQNB_2PiOn_8000, /* 8kS/s */ + LVEQNB_2PiOn_11025, + LVEQNB_2PiOn_12000, + LVEQNB_2PiOn_16000, + LVEQNB_2PiOn_22050, + LVEQNB_2PiOn_24000, + LVEQNB_2PiOn_32000, + LVEQNB_2PiOn_44100, + LVEQNB_2PiOn_48000}; /* 48kS/s */ + +/* + * Gain table + */ +const LVM_INT16 LVEQNB_GainTable[] = {LVEQNB_Gain_Neg15_dB, /* -15dB gain */ + LVEQNB_Gain_Neg14_dB, + LVEQNB_Gain_Neg13_dB, + LVEQNB_Gain_Neg12_dB, + LVEQNB_Gain_Neg11_dB, + LVEQNB_Gain_Neg10_dB, + LVEQNB_Gain_Neg9_dB, + LVEQNB_Gain_Neg8_dB, + LVEQNB_Gain_Neg7_dB, + LVEQNB_Gain_Neg6_dB, + LVEQNB_Gain_Neg5_dB, + LVEQNB_Gain_Neg4_dB, + LVEQNB_Gain_Neg3_dB, + LVEQNB_Gain_Neg2_dB, + LVEQNB_Gain_Neg1_dB, + LVEQNB_Gain_0_dB, /* 0dB gain */ + LVEQNB_Gain_1_dB, + LVEQNB_Gain_2_dB, + LVEQNB_Gain_3_dB, + LVEQNB_Gain_4_dB, + LVEQNB_Gain_5_dB, + LVEQNB_Gain_6_dB, + LVEQNB_Gain_7_dB, + LVEQNB_Gain_8_dB, + LVEQNB_Gain_9_dB, + LVEQNB_Gain_10_dB, + LVEQNB_Gain_11_dB, + LVEQNB_Gain_12_dB, + LVEQNB_Gain_13_dB, + LVEQNB_Gain_14_dB, + LVEQNB_Gain_15_dB}; /* +15dB gain */ + + +/* + * D table for 100 / (Gain + 1) + */ +const LVM_INT16 LVEQNB_DTable[] = {LVEQNB_100D_Neg15_dB, /* -15dB gain */ + LVEQNB_100D_Neg14_dB, + LVEQNB_100D_Neg13_dB, + LVEQNB_100D_Neg12_dB, + LVEQNB_100D_Neg11_dB, + LVEQNB_100D_Neg10_dB, + LVEQNB_100D_Neg9_dB, + LVEQNB_100D_Neg8_dB, + LVEQNB_100D_Neg7_dB, + LVEQNB_100D_Neg6_dB, + LVEQNB_100D_Neg5_dB, + LVEQNB_100D_Neg4_dB, + LVEQNB_100D_Neg3_dB, + LVEQNB_100D_Neg2_dB, + LVEQNB_100D_Neg1_dB, + LVEQNB_100D_0_dB}; /* 0dB gain */ + + +/************************************************************************************/ +/* */ +/* Filter polynomial coefficients */ +/* */ +/************************************************************************************/ + +/* + * Coefficients for calculating the cosine with the equation: + * + * Cos(x) = (2^Shifts)*(a0 + a1*x + a2*x^2 + a3*x^3 + a4*x^4 + a5*x^5) + * + * These coefficients expect the input, x, to be in the range 0 to 32768 respresenting + * a range of 0 to Pi. The output is in the range 32767 to -32768 representing the range + * +1.0 to -1.0 + */ +const LVM_INT16 LVEQNB_CosCoef[] = {3, /* Shifts */ + 4096, /* a0 */ + -36, /* a1 */ + -19725, /* a2 */ + -2671, /* a3 */ + 23730, /* a4 */ + -9490}; /* a5 */ + +/* + * Coefficients for calculating the cosine error with the equation: + * + * CosErr(x) = (2^Shifts)*(a0 + a1*x + a2*x^2 + a3*x^3) + * + * These coefficients expect the input, x, to be in the range 0 to 32768 respresenting + * a range of 0 to Pi/25. The output is in the range 0 to 32767 representing the range + * 0.0 to 0.0078852986 + * + * This is used to give a double precision cosine over the range 0 to Pi/25 using the + * the equation: + * + * Cos(x) = 1.0 - CosErr(x) + */ +const LVM_INT16 LVEQNB_DPCosCoef[] = {1, /* Shifts */ + 0, /* a0 */ + -6, /* a1 */ + 16586, /* a2 */ + -44}; /* a3 */ + +/************************************************************************************/ +/* */ +/* Bypass mixer time constants (100ms) */ +/* */ +/************************************************************************************/ + +#define LVEQNB_MIX_TC_Fs8000 32580 /* Floating point value 0.994262695 */ +#define LVEQNB_MIX_TC_Fs11025 32632 /* Floating point value 0.995849609 */ +#define LVEQNB_MIX_TC_Fs12000 32643 /* Floating point value 0.996185303 */ +#define LVEQNB_MIX_TC_Fs16000 32674 /* Floating point value 0.997131348 */ +#define LVEQNB_MIX_TC_Fs22050 32700 /* Floating point value 0.997924805 */ +#define LVEQNB_MIX_TC_Fs24000 32705 /* Floating point value 0.998077393 */ +#define LVEQNB_MIX_TC_Fs32000 32721 /* Floating point value 0.998565674 */ +#define LVEQNB_MIX_TC_Fs44100 32734 /* Floating point value 0.998962402 */ +#define LVEQNB_MIX_TC_Fs48000 32737 /* Floating point value 0.999053955 */ + + +const LVM_INT16 LVEQNB_MixerTCTable[] = { + LVEQNB_MIX_TC_Fs8000, + LVEQNB_MIX_TC_Fs11025, + LVEQNB_MIX_TC_Fs12000, + LVEQNB_MIX_TC_Fs16000, + LVEQNB_MIX_TC_Fs22050, + LVEQNB_MIX_TC_Fs24000, + LVEQNB_MIX_TC_Fs32000, + LVEQNB_MIX_TC_Fs44100, + LVEQNB_MIX_TC_Fs48000}; |