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Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/resampler_private.h')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/resampler_private.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/resampler_private.h b/lib/rbcodec/codecs/libopus/silk/resampler_private.h new file mode 100644 index 0000000000..45d342c78d --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/resampler_private.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_RESAMPLER_PRIVATE_H | ||
29 | #define SILK_RESAMPLER_PRIVATE_H | ||
30 | |||
31 | #ifdef __cplusplus | ||
32 | extern "C" { | ||
33 | #endif | ||
34 | |||
35 | #include "SigProc_FIX.h" | ||
36 | #include "resampler_structs.h" | ||
37 | #include "resampler_rom.h" | ||
38 | |||
39 | /* Number of input samples to process in the inner loop */ | ||
40 | #define RESAMPLER_MAX_BATCH_SIZE_MS 10 | ||
41 | #define RESAMPLER_MAX_FS_KHZ 48 | ||
42 | #define RESAMPLER_MAX_BATCH_SIZE_IN ( RESAMPLER_MAX_BATCH_SIZE_MS * RESAMPLER_MAX_FS_KHZ ) | ||
43 | |||
44 | /* Description: Hybrid IIR/FIR polyphase implementation of resampling */ | ||
45 | void silk_resampler_private_IIR_FIR( | ||
46 | void *SS, /* I/O Resampler state */ | ||
47 | opus_int16 out[], /* O Output signal */ | ||
48 | const opus_int16 in[], /* I Input signal */ | ||
49 | opus_int32 inLen /* I Number of input samples */ | ||
50 | ); | ||
51 | |||
52 | /* Description: Hybrid IIR/FIR polyphase implementation of resampling */ | ||
53 | void silk_resampler_private_down_FIR( | ||
54 | void *SS, /* I/O Resampler state */ | ||
55 | opus_int16 out[], /* O Output signal */ | ||
56 | const opus_int16 in[], /* I Input signal */ | ||
57 | opus_int32 inLen /* I Number of input samples */ | ||
58 | ); | ||
59 | |||
60 | /* Upsample by a factor 2, high quality */ | ||
61 | void silk_resampler_private_up2_HQ_wrapper( | ||
62 | void *SS, /* I/O Resampler state (unused) */ | ||
63 | opus_int16 *out, /* O Output signal [ 2 * len ] */ | ||
64 | const opus_int16 *in, /* I Input signal [ len ] */ | ||
65 | opus_int32 len /* I Number of input samples */ | ||
66 | ); | ||
67 | |||
68 | /* Upsample by a factor 2, high quality */ | ||
69 | void silk_resampler_private_up2_HQ( | ||
70 | opus_int32 *S, /* I/O Resampler state [ 6 ] */ | ||
71 | opus_int16 *out, /* O Output signal [ 2 * len ] */ | ||
72 | const opus_int16 *in, /* I Input signal [ len ] */ | ||
73 | opus_int32 len /* I Number of input samples */ | ||
74 | ); | ||
75 | |||
76 | /* Second order AR filter */ | ||
77 | void silk_resampler_private_AR2( | ||
78 | opus_int32 S[], /* I/O State vector [ 2 ] */ | ||
79 | opus_int32 out_Q8[], /* O Output signal */ | ||
80 | const opus_int16 in[], /* I Input signal */ | ||
81 | const opus_int16 A_Q14[], /* I AR coefficients, Q14 */ | ||
82 | opus_int32 len /* I Signal length */ | ||
83 | ); | ||
84 | |||
85 | #ifdef __cplusplus | ||
86 | } | ||
87 | #endif | ||
88 | #endif /* SILK_RESAMPLER_PRIVATE_H */ | ||