media/libopus/silk/resampler_rom.h@b8a032363ba2 (annotated)
media/libopus/silk/resampler_rom.h
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /*********************************************************************** |
| michael@0 | 2 | Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| michael@0 | 3 | Redistribution and use in source and binary forms, with or without |
| michael@0 | 4 | modification, are permitted provided that the following conditions |
| michael@0 | 5 | are met: |
| michael@0 | 6 | - Redistributions of source code must retain the above copyright notice, |
| michael@0 | 7 | this list of conditions and the following disclaimer. |
| michael@0 | 8 | - Redistributions in binary form must reproduce the above copyright |
| michael@0 | 9 | notice, this list of conditions and the following disclaimer in the |
| michael@0 | 10 | documentation and/or other materials provided with the distribution. |
| michael@0 | 11 | - Neither the name of Internet Society, IETF or IETF Trust, nor the |
| michael@0 | 12 | names of specific contributors, may be used to endorse or promote |
| michael@0 | 13 | products derived from this software without specific prior written |
| michael@0 | 14 | permission. |
| michael@0 | 15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| michael@0 | 16 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| michael@0 | 17 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| michael@0 | 18 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| michael@0 | 19 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| michael@0 | 20 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| michael@0 | 21 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| michael@0 | 22 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| michael@0 | 23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| michael@0 | 24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| michael@0 | 25 | POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 26 | ***********************************************************************/ |
| michael@0 | 27 | |
| michael@0 | 28 | #ifndef SILK_FIX_RESAMPLER_ROM_H |
| michael@0 | 29 | #define SILK_FIX_RESAMPLER_ROM_H |
| michael@0 | 30 | |
| michael@0 | 31 | #ifdef __cplusplus |
| michael@0 | 32 | extern "C" |
| michael@0 | 33 | { |
| michael@0 | 34 | #endif |
| michael@0 | 35 | |
| michael@0 | 36 | #include "typedef.h" |
| michael@0 | 37 | #include "resampler_structs.h" |
| michael@0 | 38 | |
| michael@0 | 39 | #define RESAMPLER_DOWN_ORDER_FIR0 18 |
| michael@0 | 40 | #define RESAMPLER_DOWN_ORDER_FIR1 24 |
| michael@0 | 41 | #define RESAMPLER_DOWN_ORDER_FIR2 36 |
| michael@0 | 42 | #define RESAMPLER_ORDER_FIR_12 8 |
| michael@0 | 43 | |
| michael@0 | 44 | /* Tables for 2x downsampler */ |
| michael@0 | 45 | static const opus_int16 silk_resampler_down2_0 = 9872; |
| michael@0 | 46 | static const opus_int16 silk_resampler_down2_1 = 39809 - 65536; |
| michael@0 | 47 | |
| michael@0 | 48 | /* Tables for 2x upsampler, high quality */ |
| michael@0 | 49 | static const opus_int16 silk_resampler_up2_hq_0[ 3 ] = { 1746, 14986, 39083 - 65536 }; |
| michael@0 | 50 | static const opus_int16 silk_resampler_up2_hq_1[ 3 ] = { 6854, 25769, 55542 - 65536 }; |
| michael@0 | 51 | |
| michael@0 | 52 | /* Tables with IIR and FIR coefficients for fractional downsamplers */ |
| michael@0 | 53 | extern const opus_int16 silk_Resampler_3_4_COEFS[ 2 + 3 * RESAMPLER_DOWN_ORDER_FIR0 / 2 ]; |
| michael@0 | 54 | extern const opus_int16 silk_Resampler_2_3_COEFS[ 2 + 2 * RESAMPLER_DOWN_ORDER_FIR0 / 2 ]; |
| michael@0 | 55 | extern const opus_int16 silk_Resampler_1_2_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR1 / 2 ]; |
| michael@0 | 56 | extern const opus_int16 silk_Resampler_1_3_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR2 / 2 ]; |
| michael@0 | 57 | extern const opus_int16 silk_Resampler_1_4_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR2 / 2 ]; |
| michael@0 | 58 | extern const opus_int16 silk_Resampler_1_6_COEFS[ 2 + RESAMPLER_DOWN_ORDER_FIR2 / 2 ]; |
| michael@0 | 59 | extern const opus_int16 silk_Resampler_2_3_COEFS_LQ[ 2 + 2 * 2 ]; |
| michael@0 | 60 | |
| michael@0 | 61 | /* Table with interplation fractions of 1/24, 3/24, ..., 23/24 */ |
| michael@0 | 62 | extern const opus_int16 silk_resampler_frac_FIR_12[ 12 ][ RESAMPLER_ORDER_FIR_12 / 2 ]; |
| michael@0 | 63 | |
| michael@0 | 64 | #ifdef __cplusplus |
| michael@0 | 65 | } |
| michael@0 | 66 | #endif |
| michael@0 | 67 | |
| michael@0 | 68 | #endif /* SILK_FIX_RESAMPLER_ROM_H */ |
