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-rw-r--r--silk/SKP_Silk_resampler_rom.c269
2 files changed, 269 insertions, 6 deletions
diff --git a/silk b/silk
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-Subproject 8a8b76efeeccaccf402b0b2b4e469980d0a4831
diff --git a/silk/SKP_Silk_resampler_rom.c b/silk/SKP_Silk_resampler_rom.c
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+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+are permitted provided that the following conditions are met:
+- Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+- Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+- Neither the name of Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+***********************************************************************/
+
+/* *
+ * File Name: SKP_Silk_resampler_rom.c *
+ * *
+ * Description: Filter coefficients for IIR/FIR polyphase resampling *
+ * Total size: <600 Words (1.2 kB) *
+ * *
+ * Copyright 2010 (c), Skype Limited *
+ * All rights reserved. *
+ * */
+
+#include "SKP_Silk_resampler_private.h"
+
+/* Tables for 2x downsampler */
+const SKP_int16 SKP_Silk_resampler_down2_0 = 9872;
+const SKP_int16 SKP_Silk_resampler_down2_1 = 39809 - 65536;
+
+/* Tables for 2x upsampler, low quality */
+const SKP_int16 SKP_Silk_resampler_up2_lq_0 = 8102;
+const SKP_int16 SKP_Silk_resampler_up2_lq_1 = 36783 - 65536;
+
+/* Tables for 2x upsampler, high quality */
+const SKP_int16 SKP_Silk_resampler_up2_hq_0[ 2 ] = { 4280, 33727 - 65536 };
+const SKP_int16 SKP_Silk_resampler_up2_hq_1[ 2 ] = { 16295, 54015 - 65536 };
+/* Matlab code for the notch filter coefficients: */
+/* B = [1, 0.14, 1]; A = [1, 0.08, 0.84]; G = 0.89; freqz(G * B, A, 2^14, 16e3); axis([0, 8000, -10, 1]); */
+/* fprintf('\t%6d, %6d, %6d, %6d\n', round(B(2)*2^16), round(-A(2)*2^16), round((1-A(3))*2^16), round(G*2^15)) */
+const SKP_int16 SKP_Silk_resampler_up2_hq_notch[ 4 ] = { 9175, -5243, 10486, 29164 };
+//const SKP_int16 SKP_Silk_resampler_up2_hq_notch[ 4 ] = { 6554, -3932, 6554, 30573 }; /* for hybrid mode? */
+
+/* Tables with IIR and FIR coefficients for fractional downsamplers (90 Words) */
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_3_4_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
+ -20253, -13986,
+ 86, 7, -151, 368, -542, 232, 11041, 21904,
+ 39, 90, -181, 216, -17, -877, 6408, 19695,
+ 2, 113, -108, 2, 314, -977, 2665, 15787,
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_2_3_COEFS[ 2 + 2 * RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
+ -13997, -14120,
+ 60, -174, 71, 298, -800, 659, 9238, 17461,
+ 48, -40, -150, 314, -155, -845, 4188, 14293,
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_1_2_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
+ 1233, -14293,
+ -91, 162, 169, -342, -505, 1332, 5281, 8742,
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_3_8_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
+ 12634, -14550,
+ 246, -175, -326, -113, 764, 2209, 3664, 4402,
+ 171, 3, -301, -258, 391, 1693, 3227, 4272,
+ 88, 138, -236, -327, 95, 1203, 2733, 4022,
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_1_3_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR / 2 ] = {
+ 16306, -14409,
+ 99, -201, -220, -16, 572, 1483, 2433, 3043,
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_2_3_COEFS_LQ[ 2 + 2 * 2 ] = {
+ -2797, -6507,
+ 4697, 10739,
+ 1567, 8276,
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_1_3_COEFS_LQ[ 2 + 3 ] = {
+ 16777, -9792,
+ 890, 1614, 2148,
+};
+
+
+/* Tables with coefficients for 4th order ARMA filter (35 Words), in a packed format: */
+/* { B1_Q14[1], B2_Q14[1], -A1_Q14[1], -A1_Q14[2], -A2_Q14[1], -A2_Q14[2], gain_Q16 } */
+/* where it is assumed that B*_Q14[0], B*_Q14[2], A*_Q14[0] are all 16384 */
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_320_441_ARMA4_COEFS[ 7 ] = {
+ 31454, 24746, -9706, -3386, -17911, -13243, 24797
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_240_441_ARMA4_COEFS[ 7 ] = {
+ 28721, 11254, 3189, -2546, -1495, -12618, 11562
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_160_441_ARMA4_COEFS[ 7 ] = {
+ 23492, -6457, 14358, -4856, 14654, -13008, 4456
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_120_441_ARMA4_COEFS[ 7 ] = {
+ 19311, -15569, 19489, -6950, 21441, -13559, 2370
+};
+
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_Resampler_80_441_ARMA4_COEFS[ 7 ] = {
+ 13248, -23849, 24126, -9486, 26806, -14286, 1065
+};
+
+/* Table with interplation fractions of 1/288 : 2/288 : 287/288 (432 Words) */
+SKP_DWORD_ALIGN const SKP_int16 SKP_Silk_resampler_frac_FIR_144[ 144 ][ RESAMPLER_ORDER_FIR_144 / 2 ] = {
+ { -25, 58, 32526},
+ { -8, -69, 32461},
+ { 8, -195, 32393},
+ { 25, -318, 32321},
+ { 41, -439, 32244},
+ { 57, -557, 32163},
+ { 72, -673, 32079},
+ { 88, -787, 31990},
+ { 103, -899, 31897},
+ { 118, -1009, 31801},
+ { 133, -1116, 31700},
+ { 148, -1221, 31596},
+ { 162, -1324, 31488},
+ { 177, -1424, 31376},
+ { 191, -1522, 31260},
+ { 205, -1618, 31140},
+ { 218, -1712, 31017},
+ { 231, -1803, 30890},
+ { 245, -1893, 30759},
+ { 257, -1980, 30625},
+ { 270, -2065, 30487},
+ { 282, -2147, 30346},
+ { 295, -2228, 30201},
+ { 306, -2306, 30052},
+ { 318, -2382, 29900},
+ { 330, -2456, 29745},
+ { 341, -2528, 29586},
+ { 352, -2597, 29424},
+ { 362, -2664, 29259},
+ { 373, -2730, 29090},
+ { 383, -2793, 28918},
+ { 393, -2854, 28743},
+ { 402, -2912, 28565},
+ { 411, -2969, 28384},
+ { 421, -3024, 28199},
+ { 429, -3076, 28012},
+ { 438, -3126, 27822},
+ { 446, -3175, 27628},
+ { 454, -3221, 27432},
+ { 462, -3265, 27233},
+ { 469, -3307, 27031},
+ { 476, -3348, 26826},
+ { 483, -3386, 26619},
+ { 490, -3422, 26409},
+ { 496, -3456, 26196},
+ { 502, -3488, 25981},
+ { 508, -3518, 25763},
+ { 514, -3547, 25543},
+ { 519, -3573, 25320},
+ { 524, -3597, 25095},
+ { 529, -3620, 24867},
+ { 533, -3640, 24637},
+ { 538, -3659, 24405},
+ { 541, -3676, 24171},
+ { 545, -3691, 23934},
+ { 548, -3704, 23696},
+ { 552, -3716, 23455},
+ { 554, -3726, 23212},
+ { 557, -3733, 22967},
+ { 559, -3740, 22721},
+ { 561, -3744, 22472},
+ { 563, -3747, 22222},
+ { 565, -3748, 21970},
+ { 566, -3747, 21716},
+ { 567, -3745, 21460},
+ { 568, -3741, 21203},
+ { 568, -3735, 20944},
+ { 568, -3728, 20684},
+ { 568, -3719, 20422},
+ { 568, -3708, 20159},
+ { 568, -3697, 19894},
+ { 567, -3683, 19628},
+ { 566, -3668, 19361},
+ { 564, -3652, 19093},
+ { 563, -3634, 18823},
+ { 561, -3614, 18552},
+ { 559, -3594, 18280},
+ { 557, -3571, 18008},
+ { 554, -3548, 17734},
+ { 552, -3523, 17459},
+ { 549, -3497, 17183},
+ { 546, -3469, 16907},
+ { 542, -3440, 16630},
+ { 539, -3410, 16352},
+ { 535, -3379, 16074},
+ { 531, -3346, 15794},
+ { 527, -3312, 15515},
+ { 522, -3277, 15235},
+ { 517, -3241, 14954},
+ { 513, -3203, 14673},
+ { 507, -3165, 14392},
+ { 502, -3125, 14110},
+ { 497, -3085, 13828},
+ { 491, -3043, 13546},
+ { 485, -3000, 13264},
+ { 479, -2957, 12982},
+ { 473, -2912, 12699},
+ { 466, -2867, 12417},
+ { 460, -2820, 12135},
+ { 453, -2772, 11853},
+ { 446, -2724, 11571},
+ { 439, -2675, 11289},
+ { 432, -2625, 11008},
+ { 424, -2574, 10727},
+ { 417, -2522, 10446},
+ { 409, -2470, 10166},
+ { 401, -2417, 9886},
+ { 393, -2363, 9607},
+ { 385, -2309, 9328},
+ { 376, -2253, 9050},
+ { 368, -2198, 8773},
+ { 359, -2141, 8497},
+ { 351, -2084, 8221},
+ { 342, -2026, 7946},
+ { 333, -1968, 7672},
+ { 324, -1910, 7399},
+ { 315, -1850, 7127},
+ { 305, -1791, 6856},
+ { 296, -1731, 6586},
+ { 286, -1670, 6317},
+ { 277, -1609, 6049},
+ { 267, -1548, 5783},
+ { 257, -1486, 5517},
+ { 247, -1424, 5254},
+ { 237, -1362, 4991},
+ { 227, -1300, 4730},
+ { 217, -1237, 4470},
+ { 207, -1174, 4212},
+ { 197, -1110, 3956},
+ { 187, -1047, 3701},
+ { 176, -984, 3448},
+ { 166, -920, 3196},
+ { 155, -856, 2946},
+ { 145, -792, 2698},
+ { 134, -728, 2452},
+ { 124, -664, 2207},
+ { 113, -600, 1965},
+ { 102, -536, 1724},
+ { 92, -472, 1486},
+ { 81, -408, 1249},
+ { 70, -345, 1015},
+ { 60, -281, 783},
+ { 49, -217, 553},
+ { 38, -154, 325},
+};
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