4 * This file is part of FFmpeg.
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.
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.
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
21 #ifndef AVCODEC_AAC_DEFINES_H
22 #define AVCODEC_AAC_DEFINES_H
30 #include "libavutil/softfloat.h"
33 #define FFT_FIXED_32 1
35 #define AAC_RENAME(x) x ## _fixed
36 #define AAC_RENAME_32(x) x ## _fixed_32
38 #define SHORTFLOAT int16_t
39 #define AAC_FLOAT SoftFloat
41 #define FIXR(a) ((int)((a) * 1 + 0.5))
42 #define FIXR10(a) ((int)((a) * 1024.0 + 0.5))
43 #define Q23(a) (int)((a) * 8388608.0 + 0.5)
44 #define Q30(x) (int)((x)*1073741824.0 + 0.5)
45 #define Q31(x) (int)((x)*2147483648.0 + 0.5)
47 #define GET_GAIN(x, y) (-(y) << (x)) + 1024
48 #define AAC_MUL26(x, y) (int)(((int64_t)(x) * (y) + 0x2000000) >> 26)
49 #define AAC_MUL30(x, y) (int)(((int64_t)(x) * (y) + 0x20000000) >> 30)
50 #define AAC_MUL31(x, y) (int)(((int64_t)(x) * (y) + 0x40000000) >> 31)
51 #define AAC_SRA_R(x, y) (int)(((x) + (1 << ((y) - 1))) >> (y))
56 #define FFT_FIXED_32 0
58 #define AAC_RENAME(x) x
59 #define AAC_RENAME_32(x) x
60 #define INTFLOAT float
61 #define SHORTFLOAT float
62 #define AAC_FLOAT float
63 #define AAC_SIGNE unsigned
64 #define FIXR(x) ((float)(x))
65 #define FIXR10(x) ((float)(x))
69 #define RANGE15(x) (32768.0 * (x))
70 #define GET_GAIN(x, y) powf((x), -(y))
71 #define AAC_MUL26(x, y) ((x) * (y))
72 #define AAC_MUL30(x, y) ((x) * (y))
73 #define AAC_MUL31(x, y) ((x) * (y))
74 #define AAC_SRA_R(x, y) (x)
76 #endif /* USE_FIXED */
78 #endif /* AVCODEC_AAC_DEFINES_H */