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      1 /***********************************************************************
      2 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
      3 Redistribution and use in source and binary forms, with or without
      4 modification, are permitted provided that the following conditions
      5 are met:
      6 - Redistributions of source code must retain the above copyright notice,
      7 this list of conditions and the following disclaimer.
      8 - Redistributions in binary form must reproduce the above copyright
      9 notice, this list of conditions and the following disclaimer in the
     10 documentation and/or other materials provided with the distribution.
     11 - Neither the name of Internet Society, IETF or IETF Trust, nor the
     12 names of specific contributors, may be used to endorse or promote
     13 products derived from this software without specific prior written
     14 permission.
     15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
     16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
     19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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     21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     25 POSSIBILITY OF SUCH DAMAGE.
     26 ***********************************************************************/
     27 
     28 #ifndef SILK_RESAMPLER_STRUCTS_H
     29 #define SILK_RESAMPLER_STRUCTS_H
     30 
     31 #ifdef __cplusplus
     32 extern "C" {
     33 #endif
     34 
     35 #define SILK_RESAMPLER_MAX_FIR_ORDER                 36
     36 #define SILK_RESAMPLER_MAX_IIR_ORDER                 6
     37 
     38 typedef struct _silk_resampler_state_struct{
     39     opus_int32       sIIR[ SILK_RESAMPLER_MAX_IIR_ORDER ]; /* this must be the first element of this struct */
     40     union{
     41         opus_int32   i32[ SILK_RESAMPLER_MAX_FIR_ORDER ];
     42         opus_int16   i16[ SILK_RESAMPLER_MAX_FIR_ORDER ];
     43     }                sFIR;
     44     opus_int16       delayBuf[ 48 ];
     45     opus_int         resampler_function;
     46     opus_int         batchSize;
     47     opus_int32       invRatio_Q16;
     48     opus_int         FIR_Order;
     49     opus_int         FIR_Fracs;
     50     opus_int         Fs_in_kHz;
     51     opus_int         Fs_out_kHz;
     52     opus_int         inputDelay;
     53     const opus_int16 *Coefs;
     54 } silk_resampler_state_struct;
     55 
     56 #ifdef __cplusplus
     57 }
     58 #endif
     59 #endif /* SILK_RESAMPLER_STRUCTS_H */
     60 
     61