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Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/resampler_rom.h')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/resampler_rom.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/resampler_rom.h b/lib/rbcodec/codecs/libopus/silk/resampler_rom.h new file mode 100644 index 0000000000..473b24a2b5 --- /dev/null +++ b/lib/rbcodec/codecs/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 */ | ||