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