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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 ------------------------------------------------------------------------------
     20    PacketVideo Corp.
     21    MP3 Decoder Library
     22 
     23    Pathname: ./cpp/include/pv_mp3dec_fxd_op_c_equivalent.h
     24 
     25      Date: 12/06/2005
     26 
     27 ------------------------------------------------------------------------------
     28  REVISION HISTORY
     29 
     30  Description:
     31 ------------------------------------------------------------------------------
     32  INCLUDE DESCRIPTION
     33 
     34 ------------------------------------------------------------------------------
     35 */
     36 
     37 #ifndef PV_MP3DEC_FXD_OP_C_EQUIVALENT
     38 #define PV_MP3DEC_FXD_OP_C_EQUIVALENT
     39 
     40 
     41 #ifdef __cplusplus
     42 extern "C"
     43 {
     44 #endif
     45 
     46 #include "pvmp3_audio_type_defs.h"
     47 #define Qfmt_31(a)   (Int32)((float)a*0x7FFFFFFF)
     48 
     49 #define Qfmt15(x)   (Int16)(x*((Int32)1<<15) + (x>=0?0.5F:-0.5F))
     50 
     51 
     52 
     53     __inline int32 pv_abs(int32 a)
     54     {
     55         int32 b = (a < 0) ? -a : a;
     56         return b;
     57     }
     58 
     59 
     60 
     61 
     62     __inline Int32 fxp_mul32_Q30(const Int32 a, const Int32 b)
     63     {
     64         return (Int32)(((int64)(a) * b) >> 30);
     65     }
     66 
     67     __inline Int32 fxp_mac32_Q30(const Int32 a, const Int32 b, Int32 L_add)
     68     {
     69         return (L_add + (Int32)(((int64)(a) * b) >> 30));
     70     }
     71 
     72     __inline Int32 fxp_mul32_Q32(const Int32 a, const Int32 b)
     73     {
     74         return (Int32)(((int64)(a) * b) >> 32);
     75     }
     76 
     77 
     78     __inline Int32 fxp_mul32_Q28(const Int32 a, const Int32 b)
     79     {
     80         return (Int32)(((int64)(a) * b) >> 28);
     81     }
     82 
     83     __inline Int32 fxp_mul32_Q27(const Int32 a, const Int32 b)
     84     {
     85         return (Int32)(((int64)(a) * b) >> 27);
     86     }
     87 
     88     __inline Int32 fxp_mul32_Q26(const Int32 a, const Int32 b)
     89     {
     90         return (Int32)(((int64)(a) * b) >> 26);
     91     }
     92 
     93 
     94     __inline Int32 fxp_mac32_Q32(Int32 L_add, const Int32 a, const Int32 b)
     95     {
     96         return (L_add + (Int32)(((int64)(a) * b) >> 32));
     97     }
     98 
     99     __inline Int32 fxp_msb32_Q32(Int32 L_sub, const Int32 a, const Int32 b)
    100     {
    101         return (L_sub - ((Int32)(((int64)(a) * b) >> 32)));
    102     }
    103 
    104 
    105     __inline Int32 fxp_mul32_Q29(const Int32 a, const Int32 b)
    106     {
    107         return (Int32)(((int64)(a) * b) >> 29);
    108     }
    109 
    110 
    111 
    112 
    113 
    114 
    115 #ifdef __cplusplus
    116 }
    117 #endif
    118 
    119 
    120 #endif   /*  PV_MP3DEC_FXD_OP_C_EQUIVALENT  */
    121 
    122 
    123 
    124