92 lines
4.9 KiB
C
92 lines
4.9 KiB
C
/***********************************************************************
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Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, (subject to the limitations in the disclaimer below)
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are permitted provided that the following conditions are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Skype Limited, nor the names of specific
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contributors, may be used to endorse or promote products derived from
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this software without specific prior written permission.
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NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
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BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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/* *
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* File Name: SKP_Silk_resample_rom.h *
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* *
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* Description: Header file for FIR resampling of *
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* 32 and 44 kHz input *
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* *
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* Copyright 2007 (c), Skype Limited *
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* All rights reserved. *
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* *
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* Date: 070807 *
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* */
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#ifndef _SKP_SILK_FIX_RESAMPLER_ROM_H_
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#define _SKP_SILK_FIX_RESAMPLER_ROM_H_
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include "SKP_Silk_typedef.h"
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#include "SKP_Silk_resampler_structs.h"
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#define RESAMPLER_DOWN_ORDER_FIR 12
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#define RESAMPLER_ORDER_FIR_144 6
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/* Tables for 2x downsampler. Values above 32767 intentionally wrap to a negative value. */
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extern const SKP_int16 SKP_Silk_resampler_down2_0;
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extern const SKP_int16 SKP_Silk_resampler_down2_1;
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/* Tables for 2x upsampler, low quality. Values above 32767 intentionally wrap to a negative value. */
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extern const SKP_int16 SKP_Silk_resampler_up2_lq_0;
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extern const SKP_int16 SKP_Silk_resampler_up2_lq_1;
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/* Tables for 2x upsampler, high quality. Values above 32767 intentionally wrap to a negative value. */
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extern const SKP_int16 SKP_Silk_resampler_up2_hq_0[ 2 ];
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extern const SKP_int16 SKP_Silk_resampler_up2_hq_1[ 2 ];
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extern const SKP_int16 SKP_Silk_resampler_up2_hq_notch[ 4 ];
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/* Tables with IIR and FIR coefficients for fractional downsamplers */
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extern const SKP_int16 SKP_Silk_Resampler_3_4_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR / 2 ];
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extern const SKP_int16 SKP_Silk_Resampler_2_3_COEFS[ 2 + 2 * RESAMPLER_DOWN_ORDER_FIR / 2 ];
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extern const SKP_int16 SKP_Silk_Resampler_1_2_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR / 2 ];
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extern const SKP_int16 SKP_Silk_Resampler_3_8_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR / 2 ];
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extern const SKP_int16 SKP_Silk_Resampler_1_3_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR / 2 ];
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extern const SKP_int16 SKP_Silk_Resampler_2_3_COEFS_LQ[ 2 + 2 * 2 ];
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extern const SKP_int16 SKP_Silk_Resampler_1_3_COEFS_LQ[ 2 + 3 ];
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/* Tables with coefficients for 4th order ARMA filter */
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extern const SKP_int16 SKP_Silk_Resampler_320_441_ARMA4_COEFS[ 7 ];
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extern const SKP_int16 SKP_Silk_Resampler_240_441_ARMA4_COEFS[ 7 ];
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extern const SKP_int16 SKP_Silk_Resampler_160_441_ARMA4_COEFS[ 7 ];
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extern const SKP_int16 SKP_Silk_Resampler_120_441_ARMA4_COEFS[ 7 ];
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extern const SKP_int16 SKP_Silk_Resampler_80_441_ARMA4_COEFS[ 7 ];
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/* Table with interplation fractions of 1/288 : 2/288 : 287/288 (432 Words) */
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extern const SKP_int16 SKP_Silk_resampler_frac_FIR_144[ 144 ][ RESAMPLER_ORDER_FIR_144 / 2 ];
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#ifdef __cplusplus
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}
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#endif
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#endif // _SKP_SILK_FIX_RESAMPLER_ROM_H_
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