Add missing #includes for avutil.h, required for the AV_VERSION* macros.
[ffmpeg-lucabe.git] / libavcodec / mpegaudio_tablegen.h
blobc95102793bcdebc60194f96509dfb984a375d923
1 /*
2 * Header file for hardcoded mpegaudiodec tables
4 * Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #ifndef MPEGAUDIO_TABLEGEN_H
24 #define MPEGAUDIO_TABLEGEN_H
26 #include <stdint.h>
27 // do not use libavutil/mathematics.h since this is compiled both
28 // for the host and the target and config.h is only valid for the target
29 #include <math.h>
31 #define TABLE_4_3_SIZE (8191 + 16)*4
32 #if CONFIG_HARDCODED_TABLES
33 #define mpegaudio_tableinit()
34 #include "libavcodec/mpegaudio_tables.h"
35 #else
36 static int8_t table_4_3_exp[TABLE_4_3_SIZE];
37 static uint32_t table_4_3_value[TABLE_4_3_SIZE];
38 static uint32_t exp_table[512];
39 static uint32_t expval_table[512][16];
41 static void mpegaudio_tableinit(void)
43 int i, value, exponent;
44 for(i=1;i<TABLE_4_3_SIZE;i++) {
45 double value = i/4;
46 double f, fm;
47 int e, m;
48 f = value * cbrtf(value) * pow(2, (i&3)*0.25);
49 fm = frexp(f, &e);
50 m = (uint32_t)(fm*(1LL<<31) + 0.5);
51 e+= FRAC_BITS - 31 + 5 - 100;
53 /* normalized to FRAC_BITS */
54 table_4_3_value[i] = m;
55 table_4_3_exp[i] = -e;
57 for(exponent=0; exponent<512; exponent++) {
58 for(value=0; value<16; value++) {
59 double f= (double)value * cbrtf(value) * pow(2, (exponent-400)*0.25 + FRAC_BITS + 5);
60 expval_table[exponent][value]= llrint(f);
62 exp_table[exponent]= expval_table[exponent][1];
65 #endif /* CONFIG_HARDCODED_TABLES */
67 #endif /* MPEGAUDIO_TABLEGEN_H */