2015-10-02 19:20:50 +02:00
|
|
|
/***********************************************************************
|
|
|
|
|
Copyright (c) 2006-2011, Skype Limited. All rights reserved.
|
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
|
|
|
modification, are permitted provided that the following conditions
|
|
|
|
|
are met:
|
|
|
|
|
- Redistributions of source code must retain the above copyright notice,
|
|
|
|
|
this list of conditions and the following disclaimer.
|
|
|
|
|
- Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
|
- Neither the name of Internet Society, IETF or IETF Trust, nor the
|
|
|
|
|
names of specific contributors, may be used to endorse or promote
|
|
|
|
|
products derived from this software without specific prior written
|
|
|
|
|
permission.
|
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
|
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
|
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
|
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
|
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
|
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
|
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
|
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
|
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
|
***********************************************************************/
|
|
|
|
|
|
|
|
|
|
#ifndef SILK_RESAMPLER_PRIVATE_H
|
|
|
|
|
#define SILK_RESAMPLER_PRIVATE_H
|
|
|
|
|
|
|
|
|
|
#ifdef __cplusplus
|
|
|
|
|
extern "C" {
|
|
|
|
|
#endif
|
|
|
|
|
|
2016-10-12 20:37:38 +02:00
|
|
|
#include "SigProc_FIX.h"
|
|
|
|
|
#include "resampler_structs.h"
|
|
|
|
|
#include "resampler_rom.h"
|
2015-10-02 19:20:50 +02:00
|
|
|
|
|
|
|
|
/* Number of input samples to process in the inner loop */
|
|
|
|
|
#define RESAMPLER_MAX_BATCH_SIZE_MS 10
|
|
|
|
|
#define RESAMPLER_MAX_FS_KHZ 48
|
|
|
|
|
#define RESAMPLER_MAX_BATCH_SIZE_IN ( RESAMPLER_MAX_BATCH_SIZE_MS * RESAMPLER_MAX_FS_KHZ )
|
|
|
|
|
|
|
|
|
|
/* 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 */
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/* 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 */
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
/* 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 */
|
|
|
|
|
);
|
|
|
|
|
|
|
|
|
|
#ifdef __cplusplus
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
#endif /* SILK_RESAMPLER_PRIVATE_H */
|
