131 lines
6.3 KiB
C
131 lines
6.3 KiB
C
/***********************************************************************
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Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, (subject to the limitations in the disclaimer below)
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are permitted provided that the following conditions are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Skype Limited, nor the names of specific
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contributors, may be used to endorse or promote products derived from
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this software without specific prior written permission.
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NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
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BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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/* *
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* File Name: SKP_Silk_resampler_structs.h *
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* *
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* Description: Structs for IIR/FIR resamplers *
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* *
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* Copyright 2010 (c), Skype Limited *
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* All rights reserved. *
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* *
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* */
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#ifndef SKP_Silk_RESAMPLER_H
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#define SKP_Silk_RESAMPLER_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "SKP_Silk_SigProc_FIX.h"
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#include "SKP_Silk_resampler_structs.h"
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#include "SKP_Silk_resampler_rom.h"
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/* Number of input samples to process in the inner loop */
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#define RESAMPLER_MAX_BATCH_SIZE_IN 480
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/* Description: Hybrid IIR/FIR polyphase implementation of resampling */
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void SKP_Silk_resampler_private_IIR_FIR(
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void *SS, /* I/O: Resampler state */
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SKP_int16 out[], /* O: Output signal */
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const SKP_int16 in[], /* I: Input signal */
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SKP_int32 inLen /* I: Number of input samples */
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);
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/* Description: Hybrid IIR/FIR polyphase implementation of resampling */
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void SKP_Silk_resampler_private_down_FIR(
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void *SS, /* I/O: Resampler state */
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SKP_int16 out[], /* O: Output signal */
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const SKP_int16 in[], /* I: Input signal */
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SKP_int32 inLen /* I: Number of input samples */
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);
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/* Copy */
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void SKP_Silk_resampler_private_copy(
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void *SS, /* I/O: Resampler state (unused) */
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SKP_int16 out[], /* O: Output signal */
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const SKP_int16 in[], /* I: Input signal */
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SKP_int32 inLen /* I: Number of input samples */
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);
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/* Upsample by a factor 2, high quality */
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void SKP_Silk_resampler_private_up2_HQ_wrapper(
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void *SS, /* I/O: Resampler state (unused) */
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SKP_int16 *out, /* O: Output signal [ 2 * len ] */
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const SKP_int16 *in, /* I: Input signal [ len ] */
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SKP_int32 len /* I: Number of input samples */
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);
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/* Upsample by a factor 2, high quality */
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void SKP_Silk_resampler_private_up2_HQ(
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SKP_int32 *S, /* I/O: Resampler state [ 6 ] */
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SKP_int16 *out, /* O: Output signal [ 2 * len ] */
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const SKP_int16 *in, /* I: Input signal [ len ] */
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SKP_int32 len /* I: Number of input samples */
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);
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/* Upsample 4x, low quality */
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void SKP_Silk_resampler_private_up4(
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SKP_int32 *S, /* I/O: State vector [ 2 ] */
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SKP_int16 *out, /* O: Output signal [ 4 * len ] */
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const SKP_int16 *in, /* I: Input signal [ len ] */
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SKP_int32 len /* I: Number of input samples */
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);
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/* Downsample 4x, low quality */
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void SKP_Silk_resampler_private_down4(
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SKP_int32 *S, /* I/O: State vector [ 2 ] */
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SKP_int16 *out, /* O: Output signal [ floor(len/2) ] */
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const SKP_int16 *in, /* I: Input signal [ len ] */
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SKP_int32 inLen /* I: Number of input samples */
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);
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/* Second order AR filter */
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void SKP_Silk_resampler_private_AR2(
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SKP_int32 S[], /* I/O: State vector [ 2 ] */
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SKP_int32 out_Q8[], /* O: Output signal */
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const SKP_int16 in[], /* I: Input signal */
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const SKP_int16 A_Q14[], /* I: AR coefficients, Q14 */
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SKP_int32 len /* I: Signal length */
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);
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/* Fourth order ARMA filter */
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void SKP_Silk_resampler_private_ARMA4(
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SKP_int32 S[], /* I/O: State vector [ 4 ] */
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SKP_int16 out[], /* O: Output signal */
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const SKP_int16 in[], /* I: Input signal */
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const SKP_int16 Coef[], /* I: ARMA coefficients [ 7 ] */
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SKP_int32 len /* I: Signal length */
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);
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#ifdef __cplusplus
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}
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#endif
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#endif // SKP_Silk_RESAMPLER_H
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