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dir: /silk/silk_resampler_private.h/

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#ifndef SILK_RESAMPLER_H
#define SILK_RESAMPLER_H

#ifdef __cplusplus
extern "C" {
#endif

#include "silk_SigProc_FIX.h"
#include "silk_resampler_structs.h"
#include "silk_resampler_rom.h"

/* Number of input samples to process in the inner loop */
#define RESAMPLER_MAX_BATCH_SIZE_IN             480

/* Description: Hybrid IIR/FIR polyphase implementation of resampling    */
void silk_resampler_private_IIR_FIR(
    void                            *SS,            /* I/O: Resampler state                         */
    opus_int16                        out[],            /* O:    Output signal                             */
    const opus_int16                    in[],            /* I:    Input signal                            */
    opus_int32                        inLen            /* I:    Number of input samples                    */
);

/* Description: Hybrid IIR/FIR polyphase implementation of resampling    */
void silk_resampler_private_down_FIR(
    void                            *SS,            /* I/O: Resampler state                         */
    opus_int16                        out[],            /* O:    Output signal                             */
    const opus_int16                    in[],            /* I:    Input signal                            */
    opus_int32                        inLen            /* I:    Number of input samples                    */
);

/* Copy */
void silk_resampler_private_copy(
    void                            *SS,            /* I/O: Resampler state (unused)                */
    opus_int16                        out[],            /* O:    Output signal                             */
    const opus_int16                    in[],            /* I:    Input signal                            */
    opus_int32                        inLen            /* I:    Number of input samples                    */
);

/* Upsample by a factor 2, high quality */
void silk_resampler_private_up2_HQ_wrapper(
    void                            *SS,            /* I/O: Resampler state (unused)                */
    opus_int16                       *out,           /* O:   Output signal [ 2 * len ]               */
    const opus_int16                 *in,            /* I:   Input signal [ len ]                    */
    opus_int32                       len             /* I:   Number of input samples                 */
);

/* Upsample by a factor 2, high quality */
void silk_resampler_private_up2_HQ(
    opus_int32                        *S,                /* I/O: Resampler state [ 6 ]                    */
    opus_int16                       *out,           /* O:   Output signal [ 2 * len ]               */
    const opus_int16                 *in,            /* I:   Input signal [ len ]                    */
    opus_int32                       len             /* I:   Number of input samples                 */
);

/* Upsample 4x, low quality */
void silk_resampler_private_up4(
    opus_int32                       *S,             /* I/O: State vector [ 2 ]                      */
    opus_int16                       *out,           /* O:   Output signal [ 4 * len ]               */
    const opus_int16                 *in,            /* I:   Input signal [ len ]                    */
    opus_int32                       len             /* I:   Number of input samples                 */
);

/* Downsample 4x, low quality */
void silk_resampler_private_down4(
    opus_int32                       *S,             /* I/O: State vector [ 2 ]                      */
    opus_int16                       *out,           /* O:   Output signal [ floor(len/2) ]          */
    const opus_int16                 *in,            /* I:   Input signal [ len ]                    */
    opus_int32                       inLen           /* I:   Number of input samples                 */
);

/* Second order AR filter */
void silk_resampler_private_AR2(
    opus_int32                        S[],            /* I/O: State vector [ 2 ]                        */
    opus_int32                        out_Q8[],        /* O:    Output signal                            */
    const opus_int16                    in[],            /* I:    Input signal                            */
    const opus_int16                    A_Q14[],        /* I:    AR coefficients, Q14                     */
    opus_int32                        len                /* I:    Signal length                            */
);

/* Fourth order ARMA filter */
void silk_resampler_private_ARMA4(
    opus_int32                        S[],            /* I/O: State vector [ 4 ]                        */
    opus_int16                        out[],            /* O:    Output signal                            */
    const opus_int16                    in[],            /* I:    Input signal                            */
    const opus_int16                    Coef[],            /* I:    ARMA coefficients [ 7 ]                 */
    opus_int32                        len                /* I:    Signal length                            */
);


#ifdef __cplusplus
}
#endif
#endif // SILK_RESAMPLER_H