| /* |
| * 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. |
| */ |
| |
| |
| /************************************************************************************/ |
| /* */ |
| /* Includes */ |
| /* */ |
| /************************************************************************************/ |
| |
| #include "LVPSA.h" |
| #include "LVPSA_QPD.h" |
| /************************************************************************************/ |
| /* */ |
| /* Sample rate table */ |
| /* */ |
| /************************************************************************************/ |
| |
| /* |
| * Sample rate table for converting between the enumerated type and the actual |
| * frequency |
| */ |
| const LVM_UINT16 LVPSA_SampleRateTab[] = { 8000, /* 8kS/s */ |
| 11025, |
| 12000, |
| 16000, |
| 22050, |
| 24000, |
| 32000, |
| 44100, |
| 48000}; /* 48kS/s */ |
| |
| /************************************************************************************/ |
| /* */ |
| /* Sample rate inverse table */ |
| /* */ |
| /************************************************************************************/ |
| |
| /* |
| * Sample rate table for converting between the enumerated type and the actual |
| * frequency |
| */ |
| const LVM_UINT32 LVPSA_SampleRateInvTab[] = { 268435, /* 8kS/s */ |
| 194783, |
| 178957, |
| 134218, |
| 97391, |
| 89478, |
| 67109, |
| 48696, |
| 44739}; /* 48kS/s */ |
| |
| |
| |
| /************************************************************************************/ |
| /* */ |
| /* Number of samples in 20ms */ |
| /* */ |
| /************************************************************************************/ |
| |
| /* |
| * Table for converting between the enumerated type and the number of samples |
| * during 20ms |
| */ |
| const LVM_UINT16 LVPSA_nSamplesBufferUpdate[] = { 160, /* 8kS/s */ |
| 220, |
| 240, |
| 320, |
| 441, |
| 480, |
| 640, |
| 882, |
| 960}; /* 48kS/s */ |
| /************************************************************************************/ |
| /* */ |
| /* Down sampling factors */ |
| /* */ |
| /************************************************************************************/ |
| |
| /* |
| * Table for converting between the enumerated type and the down sampling factor |
| */ |
| const LVM_UINT16 LVPSA_DownSamplingFactor[] = { 5, /* 8000 S/s */ |
| 7, /* 11025 S/s */ |
| 8, /* 12000 S/s */ |
| 10, /* 16000 S/s */ |
| 15, /* 22050 S/s */ |
| 16, /* 24000 S/s */ |
| 21, /* 32000 S/s */ |
| 30, /* 44100 S/s */ |
| 32}; /* 48000 S/s */ |
| |
| |
| /************************************************************************************/ |
| /* */ |
| /* Coefficient calculation tables */ |
| /* */ |
| /************************************************************************************/ |
| |
| /* |
| * Table for 2 * Pi / Fs |
| */ |
| const LVM_INT16 LVPSA_TwoPiOnFsTable[] = { 26354, /* 8kS/s */ |
| 19123, |
| 17569, |
| 13177, |
| 9561, |
| 8785, |
| 6588, |
| 4781, |
| 4392}; /* 48kS/s */ |
| |
| /* |
| * Gain table |
| */ |
| const LVM_INT16 LVPSA_GainTable[] = { 364, /* -15dB gain */ |
| 408, |
| 458, |
| 514, |
| 577, |
| 647, |
| 726, |
| 815, |
| 914, |
| 1026, |
| 1151, |
| 1292, |
| 1449, |
| 1626, |
| 1825, |
| 2048, /* 0dB gain */ |
| 2297, |
| 2578, |
| 2892, |
| 3245, |
| 3641, |
| 4096, |
| 4584, |
| 5144, |
| 5772, |
| 6476, |
| 7266, |
| 8153, |
| 9148, |
| 10264, |
| 11576}; /* +15dB gain */ |
| |
| /************************************************************************************/ |
| /* */ |
| /* Cosone 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 LVPSA_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 LVPSA_DPCosCoef[] = { 1, /* Shifts */ |
| 0, /* a0 */ |
| -6, /* a1 */ |
| 16586, /* a2 */ |
| -44}; /* a3 */ |
| |
| /************************************************************************************/ |
| /* */ |
| /* Quasi peak filter coefficients table */ |
| /* */ |
| /************************************************************************************/ |
| const QPD_C32_Coefs LVPSA_QPD_Coefs[] = { |
| |
| {0x80CEFD2B,0x00CB9B17}, /* 8kS/s */ /* LVPSA_SPEED_LOW */ |
| {0x80D242E7,0x00CED11D}, |
| {0x80DCBAF5,0x00D91679}, |
| {0x80CEFD2B,0x00CB9B17}, |
| {0x80E13739,0x00DD7CD3}, |
| {0x80DCBAF5,0x00D91679}, |
| {0x80D94BAF,0x00D5B7E7}, |
| {0x80E13739,0x00DD7CD3}, |
| {0x80DCBAF5,0x00D91679}, /* 48kS/s */ |
| |
| {0x8587513D,0x055C22CF}, /* 8kS/s */ /* LVPSA_SPEED_MEDIUM */ |
| {0x859D2967,0x0570F007}, |
| {0x85E2EFAC,0x05B34D79}, |
| {0x8587513D,0x055C22CF}, |
| {0x8600C7B9,0x05CFA6CF}, |
| {0x85E2EFAC,0x05B34D79}, |
| {0x85CC1018,0x059D8F69}, |
| {0x8600C7B9,0x05CFA6CF},//{0x8600C7B9,0x05CFA6CF}, |
| {0x85E2EFAC,0x05B34D79}, /* 48kS/s */ |
| |
| {0xA115EA7A,0x1CDB3F5C}, /* 8kS/s */ /* LVPSA_SPEED_HIGH */ |
| {0xA18475F0,0x1D2C83A2}, |
| {0xA2E1E950,0x1E2A532E}, |
| {0xA115EA7A,0x1CDB3F5C}, |
| {0xA375B2C6,0x1E943BBC}, |
| {0xA2E1E950,0x1E2A532E}, |
| {0xA26FF6BD,0x1DD81530}, |
| {0xA375B2C6,0x1E943BBC}, |
| {0xA2E1E950,0x1E2A532E}}; /* 48kS/s */ |
| |
