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Add support for hardcoding the mpegaudiodec tables.

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Reduces .bss size by about 194 kB.

Originally committed as revision 20400 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2009-10-28 18:42:52 +00:00
parent 1a04d4c722
commit eadaa00c6f
6 changed files with 273 additions and 28 deletions
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14
libavcodec/Makefile
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@ -687,7 +687,7 @@ TESTPROGS-$(HAVE_MMX) += motion
DIRS = alpha arm bfin mlib ppc ps2 sh4 sparc x86
CLEANFILES = sin_tables.c cos_tables.c costablegen$(HOSTEXESUF)
CLEANFILES = sin_tables.c cos_tables.c costablegen$(HOSTEXESUF) *_tables.h *_tablegen$(HOSTEXESUF)
include $(SUBDIR)../subdir.mak
@ -701,3 +701,15 @@ $(SUBDIR)cos_tables.c: $(SUBDIR)costablegen$(HOSTEXESUF)
$(SUBDIR)sin_tables.c: $(SUBDIR)costablegen$(HOSTEXESUF)
./$< sin > $@
ifeq ($(CONFIG_MPEGAUDIO_HP),yes)
$(SUBDIR)mpegaudio_tablegen$(HOSTEXESUF): HOSTCFLAGS += -DFRAC_BITS=23
else
$(SUBDIR)mpegaudio_tablegen$(HOSTEXESUF): HOSTCFLAGS += -DFRAC_BITS=15
endif
$(SUBDIR)%_tablegen$(HOSTEXESUF): $(SUBDIR)%_tablegen.c $(SUBDIR)tableprint.c
$(HOSTCC) $(HOSTCFLAGS) $(HOSTLDFLAGS) -o $@ $^ $(HOSTLIBS)
$(SUBDIR)mpegaudiodec.c: $(SUBDIR)mpegaudio_tables.h
$(SUBDIR)%_tables.h: $(SUBDIR)%_tablegen$(HOSTEXESUF)
./$< > $@

60
libavcodec/mpegaudio_tablegen.c Normal file
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@ -0,0 +1,60 @@
/*
* Generate a header file for hardcoded mpegaudiodec tables
*
* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
* 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 <stdlib.h>
#define CONFIG_HARDCODED_TABLES 0
#include "mpegaudio_tablegen.h"
#include "tableprint.h"
void tableinit(void)
{
mpegaudio_tableinit();
}
const struct tabledef tables[] = {
{
"static const int8_t table_4_3_exp[TABLE_4_3_SIZE]",
write_int8_array,
table_4_3_exp,
TABLE_4_3_SIZE
},
{
"static const uint32_t table_4_3_value[TABLE_4_3_SIZE]",
write_uint32_array,
table_4_3_value,
TABLE_4_3_SIZE
},
{
"static const uint32_t exp_table[512]",
write_uint32_array,
exp_table,
512
},
{
"static const uint32_t expval_table[512][16]",
write_uint32_2d_array,
expval_table,
512,
16
},
{ NULL }
};

68
libavcodec/mpegaudio_tablegen.h Normal file
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@ -0,0 +1,68 @@
/*
* Header file for hardcoded mpegaudiodec tables
*
* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
* 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
*/
#ifndef MPEGAUDIO_TABLEGEN_H
#define MPEGAUDIO_TABLEGEN_H
#include <stdint.h>
// do not use libavutil/mathematics.h since this is compiled both
// for the host and the target and config.h is only valid for the target
#include <math.h>
#define TABLE_4_3_SIZE (8191 + 16)*4
#if CONFIG_HARDCODED_TABLES
#define mpegaudio_tableinit()
#include "mpegaudio_tables.h"
#else
static int8_t table_4_3_exp[TABLE_4_3_SIZE];
static uint32_t table_4_3_value[TABLE_4_3_SIZE];
static uint32_t exp_table[512];
static uint32_t expval_table[512][16];
static void mpegaudio_tableinit(void)
{
int i;
for(i=1;i<TABLE_4_3_SIZE;i++) {
double value = i/4;
double f, fm;
int e, m;
f = value * cbrtf(value) * pow(2, (i&3)*0.25);
fm = frexp(f, &e);
m = (uint32_t)(fm*(1LL<<31) + 0.5);
e+= FRAC_BITS - 31 + 5 - 100;
/* normalized to FRAC_BITS */
table_4_3_value[i] = m;
table_4_3_exp[i] = -e;
}
for(i=0; i<512*16; i++){
double value = i & 15;
int exponent= (i>>4);
double f= value * cbrtf(value) * pow(2, (exponent-400)*0.25 + FRAC_BITS + 5);
expval_table[exponent][i&15]= llrint(f);
if((i&15)==1)
exp_table[exponent]= llrint(f);
}
}
#endif /* CONFIG_HARDCODED_TABLES && !TABLEGEN */
#endif /* MPEGAUDIO_TABLEGEN_H */

29
libavcodec/mpegaudiodec.c
View File

@ -92,12 +92,7 @@ static const int huff_quad_vlc_tables_sizes[2] = {
};
/* computed from band_size_long */
static uint16_t band_index_long[9][23];
/* XXX: free when all decoders are closed */
#define TABLE_4_3_SIZE (8191 + 16)*4
static int8_t table_4_3_exp[TABLE_4_3_SIZE];
static uint32_t table_4_3_value[TABLE_4_3_SIZE];
static uint32_t exp_table[512];
static uint32_t expval_table[512][16];
#include "mpegaudio_tablegen.h"
/* intensity stereo coef table */
static int32_t is_table[2][16];
static int32_t is_table_lsf[2][2][16];
@ -407,27 +402,7 @@ static av_cold int decode_init(AVCodecContext * avctx)
/* compute n ^ (4/3) and store it in mantissa/exp format */
int_pow_init();
for(i=1;i<TABLE_4_3_SIZE;i++) {
double value = i/4;
double f, fm;
int e, m;
f = value * cbrtf(value) * pow(2, (i&3)*0.25);
fm = frexp(f, &e);
m = (uint32_t)(fm*(1LL<<31) + 0.5);
e+= FRAC_BITS - 31 + 5 - 100;
/* normalized to FRAC_BITS */
table_4_3_value[i] = m;
table_4_3_exp[i] = -e;
}
for(i=0; i<512*16; i++){
double value = i & 15;
int exponent= (i>>4);
double f= value * cbrtf(value) * pow(2, (exponent-400)*0.25 + FRAC_BITS + 5);
expval_table[exponent][i&15]= llrint(f);
if((i&15)==1)
exp_table[exponent]= llrint(f);
}
mpegaudio_tableinit();
for(i=0;i<7;i++) {
float f;

72
libavcodec/tableprint.c Normal file
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@ -0,0 +1,72 @@
/*
* Generate a file for hardcoded tables
*
* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
* 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 <stdio.h>
#include <inttypes.h>
#include "tableprint.h"
#define WRITE_1D_FUNC(name, type, fmtstr, linebrk)\
void write_##name##_array(const void *arg, int len, int dummy)\
{\
const type *data = arg;\
int i;\
printf(" ");\
for (i = 0; i < len - 1; i++) {\
printf(" "fmtstr",", data[i]);\
if ((i & linebrk) == linebrk) printf("\n ");\
}\
printf(" "fmtstr"\n", data[i]);\
}
WRITE_1D_FUNC(int8, int8_t, "%3"PRIi8, 15)
WRITE_1D_FUNC(uint32, uint32_t, "0x%08x", 7)
#define WRITE_2D_FUNC(name, type)\
void write_##name##_2d_array(const void *arg, int len, int len2)\
{\
const type *data = arg;\
int i;\
printf(" {");\
for (i = 0; i < len; i++) {\
write_##name##_array(data + i * len2, len2, 0);\
printf(i == len - 1 ? " }\n" : " }, {\n");\
}\
}
WRITE_2D_FUNC(uint32, uint32_t)
int main(int argc, char *argv[])
{
int i;
printf("/* This file was generated by libavcodec/tableprint */\n");
printf("#include <stdint.h>\n");
tableinit();
for (i = 0; tables[i].declaration; i++) {
printf(tables[i].declaration);
printf(" = {\n");
tables[i].printfunc(tables[i].data, tables[i].size, tables[i].size2);
printf("};\n");
}
return 0;
}

58
libavcodec/tableprint.h Normal file
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@ -0,0 +1,58 @@
/*
* Generate a file for hardcoded tables
*
* Copyright (c) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
* 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
*/
#ifndef AVCODEC_TABLEPRINT_H
#define AVCODEC_TABLEPRINT_H
#include <stdint.h>
/**
* \defgroup printfuncs Predefined functions for printing tables
*
* \{
*/
void write_int8_array (const void *, int, int);
void write_uint32_array (const void *, int, int);
void write_uint32_2d_array(const void *, int, int);
/** \} */ // end of printfuncs group
struct tabledef {
/** String that declares the array. Adding " = { ..." after it should
* make a valid initializer, adding "extern" before and ";" if possible
* should make a valid extern declaration. */
const char *declaration;
/** Function used to print the table data (i.e. the part in {}).
* Should be one of the predefined write_*_array functions. */
void (*printfunc)(const void *, int, int);
/** Pointer passed to the printfunc, usually a pointer to the start
* of the array to be printed. */
const void *data;
int size; ///< size of the first dimension of the array
int size2; ///< size of the second dimension of the array if any
};
/** Initializes all the tables described in the tables array */
void tableinit(void);
/** Describes the tables that should be printed */
extern const struct tabledef tables[];
#endif /* AVCODEC_TABLEPRINT_H */