1*a58d3d2aSXin Li /*********************************************************************** 2*a58d3d2aSXin Li Copyright (c) 2006-2011, Skype Limited. All rights reserved. 3*a58d3d2aSXin Li Redistribution and use in source and binary forms, with or without 4*a58d3d2aSXin Li modification, are permitted provided that the following conditions 5*a58d3d2aSXin Li are met: 6*a58d3d2aSXin Li - Redistributions of source code must retain the above copyright notice, 7*a58d3d2aSXin Li this list of conditions and the following disclaimer. 8*a58d3d2aSXin Li - Redistributions in binary form must reproduce the above copyright 9*a58d3d2aSXin Li notice, this list of conditions and the following disclaimer in the 10*a58d3d2aSXin Li documentation and/or other materials provided with the distribution. 11*a58d3d2aSXin Li - Neither the name of Internet Society, IETF or IETF Trust, nor the 12*a58d3d2aSXin Li names of specific contributors, may be used to endorse or promote 13*a58d3d2aSXin Li products derived from this software without specific prior written 14*a58d3d2aSXin Li permission. 15*a58d3d2aSXin Li THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16*a58d3d2aSXin Li AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17*a58d3d2aSXin Li IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18*a58d3d2aSXin Li ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19*a58d3d2aSXin Li LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20*a58d3d2aSXin Li CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21*a58d3d2aSXin Li SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22*a58d3d2aSXin Li INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23*a58d3d2aSXin Li CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24*a58d3d2aSXin Li ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25*a58d3d2aSXin Li POSSIBILITY OF SUCH DAMAGE. 26*a58d3d2aSXin Li ***********************************************************************/ 27*a58d3d2aSXin Li 28*a58d3d2aSXin Li #ifndef SILK_FIX_RESAMPLER_ROM_H 29*a58d3d2aSXin Li #define SILK_FIX_RESAMPLER_ROM_H 30*a58d3d2aSXin Li 31*a58d3d2aSXin Li #ifdef __cplusplus 32*a58d3d2aSXin Li extern "C" 33*a58d3d2aSXin Li { 34*a58d3d2aSXin Li #endif 35*a58d3d2aSXin Li 36*a58d3d2aSXin Li #include "typedef.h" 37*a58d3d2aSXin Li #include "resampler_structs.h" 38*a58d3d2aSXin Li 39*a58d3d2aSXin Li #define RESAMPLER_DOWN_ORDER_FIR0 18 40*a58d3d2aSXin Li #define RESAMPLER_DOWN_ORDER_FIR1 24 41*a58d3d2aSXin Li #define RESAMPLER_DOWN_ORDER_FIR2 36 42*a58d3d2aSXin Li #define RESAMPLER_ORDER_FIR_12 8 43*a58d3d2aSXin Li 44*a58d3d2aSXin Li /* Tables for 2x downsampler */ 45*a58d3d2aSXin Li static const opus_int16 silk_resampler_down2_0 = 9872; 46*a58d3d2aSXin Li static const opus_int16 silk_resampler_down2_1 = 39809 - 65536; 47*a58d3d2aSXin Li 48*a58d3d2aSXin Li /* Tables for 2x upsampler, high quality */ 49*a58d3d2aSXin Li static const opus_int16 silk_resampler_up2_hq_0[ 3 ] = { 1746, 14986, 39083 - 65536 }; 50*a58d3d2aSXin Li static const opus_int16 silk_resampler_up2_hq_1[ 3 ] = { 6854, 25769, 55542 - 65536 }; 51*a58d3d2aSXin Li 52*a58d3d2aSXin Li /* Tables with IIR and FIR coefficients for fractional downsamplers */ 53*a58d3d2aSXin Li extern const opus_int16 silk_Resampler_3_4_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR0 / 2 ]; 54*a58d3d2aSXin Li extern const opus_int16 silk_Resampler_2_3_COEFS[ 2 + 2 * RESAMPLER_DOWN_ORDER_FIR0 / 2 ]; 55*a58d3d2aSXin Li extern const opus_int16 silk_Resampler_1_2_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR1 / 2 ]; 56*a58d3d2aSXin Li extern const opus_int16 silk_Resampler_1_3_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR2 / 2 ]; 57*a58d3d2aSXin Li extern const opus_int16 silk_Resampler_1_4_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR2 / 2 ]; 58*a58d3d2aSXin Li extern const opus_int16 silk_Resampler_1_6_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR2 / 2 ]; 59*a58d3d2aSXin Li extern const opus_int16 silk_Resampler_2_3_COEFS_LQ[ 2 + 2 * 2 ]; 60*a58d3d2aSXin Li 61*a58d3d2aSXin Li /* Table with interplation fractions of 1/24, 3/24, ..., 23/24 */ 62*a58d3d2aSXin Li extern const opus_int16 silk_resampler_frac_FIR_12[ 12 ][ RESAMPLER_ORDER_FIR_12 / 2 ]; 63*a58d3d2aSXin Li 64*a58d3d2aSXin Li #ifdef __cplusplus 65*a58d3d2aSXin Li } 66*a58d3d2aSXin Li #endif 67*a58d3d2aSXin Li 68*a58d3d2aSXin Li #endif /* SILK_FIX_RESAMPLER_ROM_H */ 69