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      1 /* ------------------------------------------------------------------
      2  * Copyright (C) 1998-2009 PacketVideo
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
     13  * express or implied.
     14  * See the License for the specific language governing permissions
     15  * and limitations under the License.
     16  * -------------------------------------------------------------------
     17  */
     18 /****************************************************************************************
     19 Portions of this file are derived from the following 3GPP standard:
     20 
     21     3GPP TS 26.173
     22     ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec
     23     Available from http://www.3gpp.org
     24 
     25 (C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
     26 Permission to distribute, modify and use this file under the standard license
     27 terms listed above has been obtained from the copyright holder.
     28 ****************************************************************************************/
     29 /*
     30 ------------------------------------------------------------------------------
     31 
     32 
     33 
     34  Pathname: ./src/pvamrwb_math_op.h
     35 
     36      Date: 01/04/2007
     37 
     38 ------------------------------------------------------------------------------
     39  REVISION HISTORY
     40 
     41  Description:
     42 ------------------------------------------------------------------------------
     43  INCLUDE DESCRIPTION
     44 
     45 ------------------------------------------------------------------------------
     46 */
     47 
     48 #ifndef PVAMRWB_MATH_OP_H
     49 #define PVAMRWB_MATH_OP_H
     50 
     51 
     52 /*----------------------------------------------------------------------------
     53 ; INCLUDES
     54 ----------------------------------------------------------------------------*/
     55 
     56 #include "pv_amr_wb_type_defs.h"
     57 
     58 /*----------------------------------------------------------------------------
     59 ; DEFINES
     60 ----------------------------------------------------------------------------*/
     61 
     62 /*----------------------------------------------------------------------------
     63 ; MACROS
     64 ; Define module specific macros here
     65 ----------------------------------------------------------------------------*/
     66 
     67 /*----------------------------------------------------------------------------
     68 ; EXTERNAL VARIABLES REFERENCES
     69 ----------------------------------------------------------------------------*/
     70 #ifdef __cplusplus
     71 extern "C"
     72 {
     73 #endif
     74 
     75 
     76     int32 one_ov_sqrt(      /* (o) Q31 : output value (range: 0<=val<1)         */
     77         int32 L_x          /* (i) Q0  : input value  (range: 0<=val<=7fffffff) */
     78     );
     79     void one_ov_sqrt_norm(
     80         int32 * frac,      /* (i/o) Q31: normalized value (1.0 < frac <= 0.5) */
     81         int16 * exp        /* (i/o)    : exponent (value = frac x 2^exponent) */
     82     );
     83     int32 power_of_2(       /* (o) Q0  : result       (range: 0<=val<=0x7fffffff) */
     84         int16 exponant,    /* (i) Q0  : Integer part.      (range: 0<=val<=30)   */
     85         int16 fraction     /* (i) Q15 : Fractionnal part.  (range: 0.0<=val<1.0) */
     86     );
     87     int32 Dot_product12(    /* (o) Q31: normalized result (1 < val <= -1) */
     88         int16 x[],         /* (i) 12bits: x vector                       */
     89         int16 y[],         /* (i) 12bits: y vector                       */
     90         int16 lg,          /* (i)    : vector length                     */
     91         int16 * exp        /* (o)    : exponent of result (0..+30)       */
     92     );
     93 
     94 
     95     void amrwb_log_2(
     96         int32 L_x,        /* (i) : input value                                 */
     97         int16 *exponent,  /* (o) : Integer part of Log2.   (range: 0<=val<=30) */
     98         int16 *fraction   /* (o) : Fractional part of Log2. (range: 0<=val<1)*/
     99     );
    100 
    101     void Lg2_normalized(
    102         int32 L_x,         /* (i) : input value (normalized)                    */
    103         int16 exp,         /* (i) : norm_l (L_x)                                */
    104         int16 *exponent,   /* (o) : Integer part of Log2.   (range: 0<=val<=30) */
    105         int16 *fraction    /* (o) : Fractional part of Log2. (range: 0<=val<1)  */
    106     );
    107 
    108 
    109     int16 mult_int16_r(int16 var1, int16 var2);          /* Mult with round, 2 */
    110     int16 shr_rnd(int16 var1, int16 var2);         /* Shift right with round, 2  */
    111 
    112     int16 div_16by16(int16 var1, int16 var2);       /* Short division,       18  */
    113 
    114 
    115     void int32_to_dpf(int32 L_32, int16 *hi, int16 *lo);
    116     int32 mpy_dpf_32(int16 hi1, int16 lo1, int16 hi2, int16 lo2);
    117 
    118 
    119 #define norm_s( x)    (normalize_amr_wb(  x) - 16)
    120 
    121 
    122 #define extract_h( x)    (int16)((x)>>16)
    123 #define L_deposit_h( x)    (int32)((x)<<16)
    124 
    125 
    126 #ifdef __cplusplus
    127 }
    128 #endif
    129 
    130 
    131 #endif /*  PVAMRWB_MATH_OP_H */
    132 
    133