22140374c8
The mpegaudio_tablegen header contains code to initialize several
tables; it is included in both the fixed as well as the floating point
mpegaudio decoders and some of these tables are only used by the fixed
resp. floating point decoders; yet both types are always initialized,
leaving the compiler to figure out that one of them is unused.
GCC 9.3 fails at this (even with -O3):
$ readelf -s mpegaudiodec_fixed.o|grep _float
28: 0000000000001660 32768 OBJECT LOCAL DEFAULT 4 expval_table_float
An actually unused table (expval_table_fixed/float) of size 32KiB is kept
and initialized (the reason for this is probably that this table is read
from, namely to initialize another table: exp_table_fixed/float; of course
the float resp. fixed tables are not used in the fixed resp. floating point
decoder).
Therefore #ifdef the unneeded tables away.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
/*
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* Generate a header file for hardcoded mpegaudiodec tables
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*
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* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
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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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#include <stdlib.h>
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#define CONFIG_HARDCODED_TABLES 0
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#define BUILD_TABLES
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#include "libavutil/tablegen.h"
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#include "mpegaudio_tablegen.h"
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#include "tableprint.h"
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int main(void)
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{
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mpegaudio_tableinit();
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write_fileheader();
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WRITE_ARRAY("static const", int8_t, table_4_3_exp);
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WRITE_ARRAY("static const", uint32_t, table_4_3_value);
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WRITE_ARRAY("static const", uint32_t, exp_table_fixed);
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WRITE_ARRAY("static const", float, exp_table_float);
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WRITE_2D_ARRAY("static const", uint32_t, expval_table_fixed);
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WRITE_2D_ARRAY("static const", float, expval_table_float);
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return 0;
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}
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