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144 lines
5.5 KiB
C
144 lines
5.5 KiB
C
/*
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* AAC defines
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_AAC_DEFINES_H
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#define AVCODEC_AAC_DEFINES_H
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#ifndef USE_FIXED
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#define USE_FIXED 0
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#endif
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#if USE_FIXED
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#include "libavutil/softfloat.h"
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#define AAC_RENAME(x) x ## _fixed
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#define AAC_RENAME2(x) x ## _fixed
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typedef int INTFLOAT;
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typedef unsigned UINTFLOAT; ///< Equivalent to INTFLOAT, Used as temporal cast to avoid undefined sign overflow operations.
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typedef int64_t INT64FLOAT;
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typedef int16_t SHORTFLOAT;
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typedef SoftFloat AAC_FLOAT;
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typedef int AAC_SIGNE;
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#define FIXR(a) ((int)((a) * 1 + 0.5))
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#define FIXR10(a) ((int)((a) * 1024.0 + 0.5))
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#define Q23(a) (int)((a) * 8388608.0 + 0.5)
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#define Q30(x) (int)((x)*1073741824.0 + 0.5)
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#define Q31(x) (int)((x)*2147483648.0 + 0.5)
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#define GET_GAIN(x, y) (-(y) * (1 << (x))) + 1024
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#define AAC_MUL16(x, y) (int)(((int64_t)(x) * (y) + 0x8000) >> 16)
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#define AAC_MUL26(x, y) (int)(((int64_t)(x) * (y) + 0x2000000) >> 26)
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#define AAC_MUL30(x, y) (int)(((int64_t)(x) * (y) + 0x20000000) >> 30)
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#define AAC_MUL31(x, y) (int)(((int64_t)(x) * (y) + 0x40000000) >> 31)
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#define AAC_MADD28(x, y, a, b) (int)((((int64_t)(x) * (y)) + \
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((int64_t)(a) * (b)) + \
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0x8000000) >> 28)
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#define AAC_MADD30(x, y, a, b) (int)((((int64_t)(x) * (y)) + \
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((int64_t)(a) * (b)) + \
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0x20000000) >> 30)
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#define AAC_MADD30_V8(x, y, a, b, c, d, e, f) (int)((((int64_t)(x) * (y)) + \
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((int64_t)(a) * (b)) + \
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((int64_t)(c) * (d)) + \
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((int64_t)(e) * (f)) + \
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0x20000000) >> 30)
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#define AAC_MSUB30(x, y, a, b) (int)((((int64_t)(x) * (y)) - \
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((int64_t)(a) * (b)) + \
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0x20000000) >> 30)
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#define AAC_MSUB30_V8(x, y, a, b, c, d, e, f) (int)((((int64_t)(x) * (y)) + \
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((int64_t)(a) * (b)) - \
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((int64_t)(c) * (d)) - \
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((int64_t)(e) * (f)) + \
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0x20000000) >> 30)
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#define AAC_MSUB31_V3(x, y, z) (int)((((int64_t)(x) * (z)) - \
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((int64_t)(y) * (z)) + \
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0x40000000) >> 31)
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#define AAC_HALF_SUM(x, y) (((x) >> 1) + ((y) >> 1))
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/**
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* Predictor State
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*/
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typedef struct PredictorStateFixed {
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SoftFloat cor0;
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SoftFloat cor1;
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SoftFloat var0;
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SoftFloat var1;
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SoftFloat r0;
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SoftFloat r1;
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SoftFloat k1;
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SoftFloat x_est;
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} PredictorState;
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#ifdef LPC_USE_FIXED
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#error aac_defines.h must be included before lpc_functions.h for fixed point decoder
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#endif
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#define LPC_USE_FIXED 1
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#define LPC_MUL26(x, y) AAC_MUL26((x), (y))
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#define LPC_FIXR(x) FIXR(x)
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#define LPC_SRA_R(x, y) (int)(((x) + (1 << ((y) - 1))) >> (y))
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#else
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#define AAC_RENAME(x) x
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#define AAC_RENAME2(x) ff_ ## x
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typedef float INTFLOAT;
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typedef float UINTFLOAT;
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typedef float INT64FLOAT;
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typedef float SHORTFLOAT;
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typedef float AAC_FLOAT;
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typedef unsigned AAC_SIGNE;
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#define FIXR(x) ((float)(x))
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#define FIXR10(x) ((float)(x))
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#define Q23(x) ((float)(x))
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#define Q30(x) ((float)(x))
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#define Q31(x) ((float)(x))
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#define GET_GAIN(x, y) powf((x), -(y))
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#define AAC_MUL16(x, y) ((x) * (y))
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#define AAC_MUL26(x, y) ((x) * (y))
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#define AAC_MUL30(x, y) ((x) * (y))
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#define AAC_MUL31(x, y) ((x) * (y))
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#define AAC_MADD28(x, y, a, b) ((x) * (y) + (a) * (b))
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#define AAC_MADD30(x, y, a, b) ((x) * (y) + (a) * (b))
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#define AAC_MADD30_V8(x, y, a, b, c, d, e, f) ((x) * (y) + (a) * (b) + \
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(c) * (d) + (e) * (f))
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#define AAC_MSUB30(x, y, a, b) ((x) * (y) - (a) * (b))
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#define AAC_MSUB30_V8(x, y, a, b, c, d, e, f) ((x) * (y) + (a) * (b) - \
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(c) * (d) - (e) * (f))
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#define AAC_MSUB31_V3(x, y, z) ((x) - (y)) * (z)
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#define AAC_HALF_SUM(x, y) ((x) + (y)) * 0.5f
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/**
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* Predictor State
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*/
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typedef struct PredictorState {
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float cor0;
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float cor1;
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float var0;
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float var1;
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float r0;
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float r1;
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float k1;
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float x_est;
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} PredictorState;
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#endif /* USE_FIXED */
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#endif /* AVCODEC_AAC_DEFINES_H */
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