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27
28#ifndef SILK_RESAMPLER_PRIVATE_H
29#define SILK_RESAMPLER_PRIVATE_H
30
31#ifdef __cplusplus
32extern "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 */
45void 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 */
53void 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 */
61void 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 */
69void 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 */
77void 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 */
89