|
Chris@69
|
1 /***********************************************************************
|
|
Chris@69
|
2 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
|
|
Chris@69
|
3 Redistribution and use in source and binary forms, with or without
|
|
Chris@69
|
4 modification, are permitted provided that the following conditions
|
|
Chris@69
|
5 are met:
|
|
Chris@69
|
6 - Redistributions of source code must retain the above copyright notice,
|
|
Chris@69
|
7 this list of conditions and the following disclaimer.
|
|
Chris@69
|
8 - Redistributions in binary form must reproduce the above copyright
|
|
Chris@69
|
9 notice, this list of conditions and the following disclaimer in the
|
|
Chris@69
|
10 documentation and/or other materials provided with the distribution.
|
|
Chris@69
|
11 - Neither the name of Internet Society, IETF or IETF Trust, nor the
|
|
Chris@69
|
12 names of specific contributors, may be used to endorse or promote
|
|
Chris@69
|
13 products derived from this software without specific prior written
|
|
Chris@69
|
14 permission.
|
|
Chris@69
|
15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
Chris@69
|
16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
Chris@69
|
17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
Chris@69
|
18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
Chris@69
|
19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
Chris@69
|
20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
Chris@69
|
21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
Chris@69
|
22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
Chris@69
|
23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
Chris@69
|
24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
Chris@69
|
25 POSSIBILITY OF SUCH DAMAGE.
|
|
Chris@69
|
26 ***********************************************************************/
|
|
Chris@69
|
27
|
|
Chris@69
|
28 #ifndef SILK_RESAMPLER_PRIVATE_H
|
|
Chris@69
|
29 #define SILK_RESAMPLER_PRIVATE_H
|
|
Chris@69
|
30
|
|
Chris@69
|
31 #ifdef __cplusplus
|
|
Chris@69
|
32 extern "C" {
|
|
Chris@69
|
33 #endif
|
|
Chris@69
|
34
|
|
Chris@69
|
35 #include "SigProc_FIX.h"
|
|
Chris@69
|
36 #include "resampler_structs.h"
|
|
Chris@69
|
37 #include "resampler_rom.h"
|
|
Chris@69
|
38
|
|
Chris@69
|
39 /* Number of input samples to process in the inner loop */
|
|
Chris@69
|
40 #define RESAMPLER_MAX_BATCH_SIZE_MS 10
|
|
Chris@69
|
41 #define RESAMPLER_MAX_FS_KHZ 48
|
|
Chris@69
|
42 #define RESAMPLER_MAX_BATCH_SIZE_IN ( RESAMPLER_MAX_BATCH_SIZE_MS * RESAMPLER_MAX_FS_KHZ )
|
|
Chris@69
|
43
|
|
Chris@69
|
44 /* Description: Hybrid IIR/FIR polyphase implementation of resampling */
|
|
Chris@69
|
45 void silk_resampler_private_IIR_FIR(
|
|
Chris@69
|
46 void *SS, /* I/O Resampler state */
|
|
Chris@69
|
47 opus_int16 out[], /* O Output signal */
|
|
Chris@69
|
48 const opus_int16 in[], /* I Input signal */
|
|
Chris@69
|
49 opus_int32 inLen /* I Number of input samples */
|
|
Chris@69
|
50 );
|
|
Chris@69
|
51
|
|
Chris@69
|
52 /* Description: Hybrid IIR/FIR polyphase implementation of resampling */
|
|
Chris@69
|
53 void silk_resampler_private_down_FIR(
|
|
Chris@69
|
54 void *SS, /* I/O Resampler state */
|
|
Chris@69
|
55 opus_int16 out[], /* O Output signal */
|
|
Chris@69
|
56 const opus_int16 in[], /* I Input signal */
|
|
Chris@69
|
57 opus_int32 inLen /* I Number of input samples */
|
|
Chris@69
|
58 );
|
|
Chris@69
|
59
|
|
Chris@69
|
60 /* Upsample by a factor 2, high quality */
|
|
Chris@69
|
61 void silk_resampler_private_up2_HQ_wrapper(
|
|
Chris@69
|
62 void *SS, /* I/O Resampler state (unused) */
|
|
Chris@69
|
63 opus_int16 *out, /* O Output signal [ 2 * len ] */
|
|
Chris@69
|
64 const opus_int16 *in, /* I Input signal [ len ] */
|
|
Chris@69
|
65 opus_int32 len /* I Number of input samples */
|
|
Chris@69
|
66 );
|
|
Chris@69
|
67
|
|
Chris@69
|
68 /* Upsample by a factor 2, high quality */
|
|
Chris@69
|
69 void silk_resampler_private_up2_HQ(
|
|
Chris@69
|
70 opus_int32 *S, /* I/O Resampler state [ 6 ] */
|
|
Chris@69
|
71 opus_int16 *out, /* O Output signal [ 2 * len ] */
|
|
Chris@69
|
72 const opus_int16 *in, /* I Input signal [ len ] */
|
|
Chris@69
|
73 opus_int32 len /* I Number of input samples */
|
|
Chris@69
|
74 );
|
|
Chris@69
|
75
|
|
Chris@69
|
76 /* Second order AR filter */
|
|
Chris@69
|
77 void silk_resampler_private_AR2(
|
|
Chris@69
|
78 opus_int32 S[], /* I/O State vector [ 2 ] */
|
|
Chris@69
|
79 opus_int32 out_Q8[], /* O Output signal */
|
|
Chris@69
|
80 const opus_int16 in[], /* I Input signal */
|
|
Chris@69
|
81 const opus_int16 A_Q14[], /* I AR coefficients, Q14 */
|
|
Chris@69
|
82 opus_int32 len /* I Signal length */
|
|
Chris@69
|
83 );
|
|
Chris@69
|
84
|
|
Chris@69
|
85 #ifdef __cplusplus
|
|
Chris@69
|
86 }
|
|
Chris@69
|
87 #endif
|
|
Chris@69
|
88 #endif /* SILK_RESAMPLER_PRIVATE_H */
|
