81 lines
3.8 KiB
C
81 lines
3.8 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_STRUCTS_H
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#define SKP_Silk_RESAMPLER_STRUCTS_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Flag to enable support for input/output sampling rates above 48 kHz. Turn off for embedded devices */
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#define RESAMPLER_SUPPORT_ABOVE_48KHZ 1
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#define SKP_Silk_RESAMPLER_MAX_FIR_ORDER 16
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#define SKP_Silk_RESAMPLER_MAX_IIR_ORDER 6
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typedef struct _SKP_Silk_resampler_state_struct{
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SKP_int32 sIIR[ SKP_Silk_RESAMPLER_MAX_IIR_ORDER ]; /* this must be the first element of this struct */
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SKP_int32 sFIR[ SKP_Silk_RESAMPLER_MAX_FIR_ORDER ];
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SKP_int32 sDown2[ 2 ];
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void (*resampler_function)( void *, SKP_int16 *, const SKP_int16 *, SKP_int32 );
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void (*up2_function)( SKP_int32 *, SKP_int16 *, const SKP_int16 *, SKP_int32 );
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SKP_int32 batchSize;
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SKP_int32 invRatio_Q16;
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SKP_int32 FIR_Fracs;
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SKP_int32 input2x;
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const SKP_int16 *Coefs;
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#if RESAMPLER_SUPPORT_ABOVE_48KHZ
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SKP_int32 sDownPre[ 2 ];
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SKP_int32 sUpPost[ 2 ];
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void (*down_pre_function)( SKP_int32 *, SKP_int16 *, const SKP_int16 *, SKP_int32 );
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void (*up_post_function)( SKP_int32 *, SKP_int16 *, const SKP_int16 *, SKP_int32 );
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SKP_int32 batchSizePrePost;
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SKP_int32 ratio_Q16;
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SKP_int32 nPreDownsamplers;
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SKP_int32 nPostUpsamplers;
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#endif
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SKP_int32 magic_number;
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} SKP_Silk_resampler_state_struct;
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#ifdef __cplusplus
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}
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#endif
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#endif /* SKP_Silk_RESAMPLER_STRUCTS_H */
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