ref: be89c395872c57087a6fd0b004ee175677bb3d79
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*/