cannam@154: /***********************************************************************
cannam@154: Copyright (c) 2006-2011, Skype Limited. All rights reserved.
cannam@154: Redistribution and use in source and binary forms, with or without
cannam@154: modification, are permitted provided that the following conditions
cannam@154: are met:
cannam@154: - Redistributions of source code must retain the above copyright notice,
cannam@154: this list of conditions and the following disclaimer.
cannam@154: - Redistributions in binary form must reproduce the above copyright
cannam@154: notice, this list of conditions and the following disclaimer in the
cannam@154: documentation and/or other materials provided with the distribution.
cannam@154: - Neither the name of Internet Society, IETF or IETF Trust, nor the
cannam@154: names of specific contributors, may be used to endorse or promote
cannam@154: products derived from this software without specific prior written
cannam@154: permission.
cannam@154: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
cannam@154: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
cannam@154: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
cannam@154: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
cannam@154: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
cannam@154: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
cannam@154: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
cannam@154: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
cannam@154: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
cannam@154: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
cannam@154: POSSIBILITY OF SUCH DAMAGE.
cannam@154: ***********************************************************************/
cannam@154: 
cannam@154: #ifndef SILK_FIX_RESAMPLER_ROM_H
cannam@154: #define SILK_FIX_RESAMPLER_ROM_H
cannam@154: 
cannam@154: #ifdef  __cplusplus
cannam@154: extern "C"
cannam@154: {
cannam@154: #endif
cannam@154: 
cannam@154: #include "typedef.h"
cannam@154: #include "resampler_structs.h"
cannam@154: 
cannam@154: #define RESAMPLER_DOWN_ORDER_FIR0               18
cannam@154: #define RESAMPLER_DOWN_ORDER_FIR1               24
cannam@154: #define RESAMPLER_DOWN_ORDER_FIR2               36
cannam@154: #define RESAMPLER_ORDER_FIR_12                  8
cannam@154: 
cannam@154: /* Tables for 2x downsampler */
cannam@154: static const opus_int16 silk_resampler_down2_0 = 9872;
cannam@154: static const opus_int16 silk_resampler_down2_1 = 39809 - 65536;
cannam@154: 
cannam@154: /* Tables for 2x upsampler, high quality */
cannam@154: static const opus_int16 silk_resampler_up2_hq_0[ 3 ] = { 1746, 14986, 39083 - 65536 };
cannam@154: static const opus_int16 silk_resampler_up2_hq_1[ 3 ] = { 6854, 25769, 55542 - 65536 };
cannam@154: 
cannam@154: /* Tables with IIR and FIR coefficients for fractional downsamplers */
cannam@154: extern const opus_int16 silk_Resampler_3_4_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR0 / 2 ];
cannam@154: extern const opus_int16 silk_Resampler_2_3_COEFS[ 2 + 2 * RESAMPLER_DOWN_ORDER_FIR0 / 2 ];
cannam@154: extern const opus_int16 silk_Resampler_1_2_COEFS[ 2 +     RESAMPLER_DOWN_ORDER_FIR1 / 2 ];
cannam@154: extern const opus_int16 silk_Resampler_1_3_COEFS[ 2 +     RESAMPLER_DOWN_ORDER_FIR2 / 2 ];
cannam@154: extern const opus_int16 silk_Resampler_1_4_COEFS[ 2 +     RESAMPLER_DOWN_ORDER_FIR2 / 2 ];
cannam@154: extern const opus_int16 silk_Resampler_1_6_COEFS[ 2 +     RESAMPLER_DOWN_ORDER_FIR2 / 2 ];
cannam@154: extern const opus_int16 silk_Resampler_2_3_COEFS_LQ[ 2 + 2 * 2 ];
cannam@154: 
cannam@154: /* Table with interplation fractions of 1/24, 3/24, ..., 23/24 */
cannam@154: extern const opus_int16 silk_resampler_frac_FIR_12[ 12 ][ RESAMPLER_ORDER_FIR_12 / 2 ];
cannam@154: 
cannam@154: #ifdef  __cplusplus
cannam@154: }
cannam@154: #endif
cannam@154: 
cannam@154: #endif /* SILK_FIX_RESAMPLER_ROM_H */