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Member "ffmpeg-4.0.1/libavcodec/aac_defines.h" (13 Apr 2018, 5140 Bytes) of package /linux/misc/ffmpeg-4.0.1.tar.xz:


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    1 /*
    2  * AAC defines
    3  *
    4  * This file is part of FFmpeg.
    5  *
    6  * FFmpeg is free software; you can redistribute it and/or
    7  * modify it under the terms of the GNU Lesser General Public
    8  * License as published by the Free Software Foundation; either
    9  * version 2.1 of the License, or (at your option) any later version.
   10  *
   11  * FFmpeg is distributed in the hope that it will be useful,
   12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   14  * Lesser General Public License for more details.
   15  *
   16  * You should have received a copy of the GNU Lesser General Public
   17  * License along with FFmpeg; if not, write to the Free Software
   18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   19  */
   20 
   21 #ifndef AVCODEC_AAC_DEFINES_H
   22 #define AVCODEC_AAC_DEFINES_H
   23 
   24 #ifndef USE_FIXED
   25 #define USE_FIXED 0
   26 #endif
   27 
   28 #if USE_FIXED
   29 
   30 #include "libavutil/softfloat.h"
   31 
   32 #define FFT_FLOAT    0
   33 #define FFT_FIXED_32 1
   34 
   35 #define AAC_RENAME(x)       x ## _fixed
   36 #define AAC_RENAME_32(x)    x ## _fixed_32
   37 typedef int                 INTFLOAT;
   38 typedef unsigned            UINTFLOAT;  ///< Equivalent to INTFLOAT, Used as temporal cast to avoid undefined sign overflow operations.
   39 typedef int64_t             INT64FLOAT;
   40 typedef int16_t             SHORTFLOAT;
   41 typedef SoftFloat           AAC_FLOAT;
   42 typedef int                 AAC_SIGNE;
   43 #define FIXR(a)             ((int)((a) * 1 + 0.5))
   44 #define FIXR10(a)           ((int)((a) * 1024.0 + 0.5))
   45 #define Q23(a)              (int)((a) * 8388608.0 + 0.5)
   46 #define Q30(x)              (int)((x)*1073741824.0 + 0.5)
   47 #define Q31(x)              (int)((x)*2147483648.0 + 0.5)
   48 #define RANGE15(x)          x
   49 #define GET_GAIN(x, y)      (-(y) * (1 << (x))) + 1024
   50 #define AAC_MUL16(x, y)     (int)(((int64_t)(x) * (y) + 0x8000) >> 16)
   51 #define AAC_MUL26(x, y)     (int)(((int64_t)(x) * (y) + 0x2000000) >> 26)
   52 #define AAC_MUL30(x, y)     (int)(((int64_t)(x) * (y) + 0x20000000) >> 30)
   53 #define AAC_MUL31(x, y)     (int)(((int64_t)(x) * (y) + 0x40000000) >> 31)
   54 #define AAC_MADD28(x, y, a, b) (int)((((int64_t)(x) * (y)) + \
   55                                       ((int64_t)(a) * (b)) + \
   56                                         0x8000000) >> 28)
   57 #define AAC_MADD30(x, y, a, b) (int)((((int64_t)(x) * (y)) + \
   58                                       ((int64_t)(a) * (b)) + \
   59                                         0x20000000) >> 30)
   60 #define AAC_MADD30_V8(x, y, a, b, c, d, e, f) (int)((((int64_t)(x) * (y)) + \
   61                                                      ((int64_t)(a) * (b)) + \
   62                                                      ((int64_t)(c) * (d)) + \
   63                                                      ((int64_t)(e) * (f)) + \
   64                                                        0x20000000) >> 30)
   65 #define AAC_MSUB30(x, y, a, b) (int)((((int64_t)(x) * (y)) - \
   66                                       ((int64_t)(a) * (b)) + \
   67                                         0x20000000) >> 30)
   68 #define AAC_MSUB30_V8(x, y, a, b, c, d, e, f) (int)((((int64_t)(x) * (y)) + \
   69                                                      ((int64_t)(a) * (b)) - \
   70                                                      ((int64_t)(c) * (d)) - \
   71                                                      ((int64_t)(e) * (f)) + \
   72                                                        0x20000000) >> 30)
   73 #define AAC_MSUB31_V3(x, y, z)    (int)((((int64_t)(x) * (z)) - \
   74                                       ((int64_t)(y) * (z)) + \
   75                                         0x40000000) >> 31)
   76 #define AAC_HALF_SUM(x, y)  (((x) >> 1) + ((y) >> 1))
   77 #define AAC_SRA_R(x, y)     (int)(((x) + (1 << ((y) - 1))) >> (y))
   78 
   79 #else
   80 
   81 #define FFT_FLOAT    1
   82 #define FFT_FIXED_32 0
   83 
   84 #define AAC_RENAME(x)       x
   85 #define AAC_RENAME_32(x)    x
   86 typedef float               INTFLOAT;
   87 typedef float               UINTFLOAT;
   88 typedef float               INT64FLOAT;
   89 typedef float               SHORTFLOAT;
   90 typedef float               AAC_FLOAT;
   91 typedef unsigned            AAC_SIGNE;
   92 #define FIXR(x)             ((float)(x))
   93 #define FIXR10(x)           ((float)(x))
   94 #define Q23(x)              ((float)(x))
   95 #define Q30(x)              ((float)(x))
   96 #define Q31(x)              ((float)(x))
   97 #define RANGE15(x)          (32768.0 * (x))
   98 #define GET_GAIN(x, y)      powf((x), -(y))
   99 #define AAC_MUL16(x, y)     ((x) * (y))
  100 #define AAC_MUL26(x, y)     ((x) * (y))
  101 #define AAC_MUL30(x, y)     ((x) * (y))
  102 #define AAC_MUL31(x, y)     ((x) * (y))
  103 #define AAC_MADD28(x, y, a, b) ((x) * (y) + (a) * (b))
  104 #define AAC_MADD30(x, y, a, b) ((x) * (y) + (a) * (b))
  105 #define AAC_MADD30_V8(x, y, a, b, c, d, e, f) ((x) * (y) + (a) * (b) + \
  106                                                (c) * (d) + (e) * (f))
  107 #define AAC_MSUB30(x, y, a, b) ((x) * (y) - (a) * (b))
  108 #define AAC_MSUB30_V8(x, y, a, b, c, d, e, f) ((x) * (y) + (a) * (b) - \
  109                                                (c) * (d) - (e) * (f))
  110 #define AAC_MSUB31_V3(x, y, z)    ((x) - (y)) * (z)
  111 #define AAC_HALF_SUM(x, y)  ((x) + (y)) * 0.5f
  112 #define AAC_SRA_R(x, y)     (x)
  113 
  114 #endif /* USE_FIXED */
  115 
  116 #endif /* AVCODEC_AAC_DEFINES_H */