/* * Template for the Discrete Cosine Transform for 32 samples * Copyright (c) 2001, 2002 Fabrice Bellard * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "dct32.h" #include "mathops.h" #include "libavutil/internal.h" #ifdef CHECKED #define SUINT … #define SUINT32 … #else #define SUINT … #define SUINT32 … #endif #if DCT32_FLOAT #define dct32 … #define FIXHR(x) … #define MULH3(x, y, s) … #define INTFLOAT … #define SUINTFLOAT … #else #define dct32 … #define FIXHR … #define MULH3 … #define INTFLOAT … #define SUINTFLOAT … #endif /* tab[i][j] = 1.0 / (2.0 * cos(pi*(2*k+1) / 2^(6 - j))) */ /* cos(i*pi/64) */ #define COS0_0 … #define COS0_1 … #define COS0_2 … #define COS0_3 … #define COS0_4 … #define COS0_5 … #define COS0_6 … #define COS0_7 … #define COS0_8 … #define COS0_9 … #define COS0_10 … #define COS0_11 … #define COS0_12 … #define COS0_13 … #define COS0_14 … #define COS0_15 … #define COS1_0 … #define COS1_1 … #define COS1_2 … #define COS1_3 … #define COS1_4 … #define COS1_5 … #define COS1_6 … #define COS1_7 … #define COS2_0 … #define COS2_1 … #define COS2_2 … #define COS2_3 … #define COS3_0 … #define COS3_1 … #define COS4_0 … /* butterfly operator */ #define BF(a, b, c, s) … #define BF0(a, b, c, s) … #define BF1(a, b, c, d) … #define BF2(a, b, c, d) … #define ADD(a, b) … /* DCT32 without 1/sqrt(2) coef zero scaling. */ void dct32(INTFLOAT *out, const INTFLOAT *tab_arg) { … }
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