Chris@69: /***********************************************************************
Chris@69: Copyright (c) 2006-2011, Skype Limited. All rights reserved.
Chris@69: Redistribution and use in source and binary forms, with or without
Chris@69: modification, are permitted provided that the following conditions
Chris@69: are met:
Chris@69: - Redistributions of source code must retain the above copyright notice,
Chris@69: this list of conditions and the following disclaimer.
Chris@69: - Redistributions in binary form must reproduce the above copyright
Chris@69: notice, this list of conditions and the following disclaimer in the
Chris@69: documentation and/or other materials provided with the distribution.
Chris@69: - Neither the name of Internet Society, IETF or IETF Trust, nor the
Chris@69: names of specific contributors, may be used to endorse or promote
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Chris@69: 
Chris@69: #ifndef SILK_FIX_RESAMPLER_ROM_H
Chris@69: #define SILK_FIX_RESAMPLER_ROM_H
Chris@69: 
Chris@69: #ifdef  __cplusplus
Chris@69: extern "C"
Chris@69: {
Chris@69: #endif
Chris@69: 
Chris@69: #include "typedef.h"
Chris@69: #include "resampler_structs.h"
Chris@69: 
Chris@69: #define RESAMPLER_DOWN_ORDER_FIR0               18
Chris@69: #define RESAMPLER_DOWN_ORDER_FIR1               24
Chris@69: #define RESAMPLER_DOWN_ORDER_FIR2               36
Chris@69: #define RESAMPLER_ORDER_FIR_12                  8
Chris@69: 
Chris@69: /* Tables for 2x downsampler */
Chris@69: static const opus_int16 silk_resampler_down2_0 = 9872;
Chris@69: static const opus_int16 silk_resampler_down2_1 = 39809 - 65536;
Chris@69: 
Chris@69: /* Tables for 2x upsampler, high quality */
Chris@69: static const opus_int16 silk_resampler_up2_hq_0[ 3 ] = { 1746, 14986, 39083 - 65536 };
Chris@69: static const opus_int16 silk_resampler_up2_hq_1[ 3 ] = { 6854, 25769, 55542 - 65536 };
Chris@69: 
Chris@69: /* Tables with IIR and FIR coefficients for fractional downsamplers */
Chris@69: extern const opus_int16 silk_Resampler_3_4_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR0 / 2 ];
Chris@69: extern const opus_int16 silk_Resampler_2_3_COEFS[ 2 + 2 * RESAMPLER_DOWN_ORDER_FIR0 / 2 ];
Chris@69: extern const opus_int16 silk_Resampler_1_2_COEFS[ 2 +     RESAMPLER_DOWN_ORDER_FIR1 / 2 ];
Chris@69: extern const opus_int16 silk_Resampler_1_3_COEFS[ 2 +     RESAMPLER_DOWN_ORDER_FIR2 / 2 ];
Chris@69: extern const opus_int16 silk_Resampler_1_4_COEFS[ 2 +     RESAMPLER_DOWN_ORDER_FIR2 / 2 ];
Chris@69: extern const opus_int16 silk_Resampler_1_6_COEFS[ 2 +     RESAMPLER_DOWN_ORDER_FIR2 / 2 ];
Chris@69: extern const opus_int16 silk_Resampler_2_3_COEFS_LQ[ 2 + 2 * 2 ];
Chris@69: 
Chris@69: /* Table with interplation fractions of 1/24, 3/24, ..., 23/24 */
Chris@69: extern const opus_int16 silk_resampler_frac_FIR_12[ 12 ][ RESAMPLER_ORDER_FIR_12 / 2 ];
Chris@69: 
Chris@69: #ifdef  __cplusplus
Chris@69: }
Chris@69: #endif
Chris@69: 
Chris@69: #endif /* SILK_FIX_RESAMPLER_ROM_H */