virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

avcodec/sinewin_tablegen: Make initializing ff_sine_windows thread-safe

Browse Source 
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-11-22 17:29:21 +01:00
parent cdea393093
commit 3719122065
2 changed files with 44 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
libavcodec/sinewin_tablegen.h
View File

@ -32,6 +32,10 @@
#include "libavutil/common.h"
#if !CONFIG_HARDCODED_TABLES
#ifndef BUILD_TABLES
#include "libavutil/thread.h"
#endif
SINETABLE( 32);
SINETABLE( 64);
SINETABLE( 128);
@ -69,10 +73,49 @@ av_cold void AAC_RENAME(ff_sine_window_init)(INTFLOAT *window, int n) {
window[i] = SIN_FIX(sinf((i + 0.5) * (M_PI / (2.0 * n))));
}
#if !CONFIG_HARDCODED_TABLES && !defined(BUILD_TABLES)
#define INIT_FF_SINE_WINDOW_INIT_FUNC(index) \
static void init_ff_sine_window_ ## index(void) \
{ \
AAC_RENAME(ff_sine_window_init)(AAC_RENAME(ff_sine_windows)[index], 1 << index);\
}
INIT_FF_SINE_WINDOW_INIT_FUNC(5)
INIT_FF_SINE_WINDOW_INIT_FUNC(6)
INIT_FF_SINE_WINDOW_INIT_FUNC(7)
INIT_FF_SINE_WINDOW_INIT_FUNC(8)
INIT_FF_SINE_WINDOW_INIT_FUNC(9)
INIT_FF_SINE_WINDOW_INIT_FUNC(10)
INIT_FF_SINE_WINDOW_INIT_FUNC(11)
INIT_FF_SINE_WINDOW_INIT_FUNC(12)
INIT_FF_SINE_WINDOW_INIT_FUNC(13)
static void (*const sine_window_init_func_array[])(void) = {
init_ff_sine_window_5,
init_ff_sine_window_6,
init_ff_sine_window_7,
init_ff_sine_window_8,
init_ff_sine_window_9,
init_ff_sine_window_10,
init_ff_sine_window_11,
init_ff_sine_window_12,
init_ff_sine_window_13,
};
static AVOnce init_sine_window_once[9] = {
AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT,
AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT, AV_ONCE_INIT
};
#endif
av_cold void AAC_RENAME(ff_init_ff_sine_windows)(int index) {
assert(index >= 5 && index < FF_ARRAY_ELEMS(AAC_RENAME(ff_sine_windows)));
#if !CONFIG_HARDCODED_TABLES
#ifdef BUILD_TABLES
AAC_RENAME(ff_sine_window_init)(AAC_RENAME(ff_sine_windows)[index], 1 << index);
#else
ff_thread_once(&init_sine_window_once[index - 5], sine_window_init_func_array[index - 5]);
#endif
#endif
}

1
libavcodec/sinewin_tablegen_template.c
View File

@ -23,6 +23,7 @@
#include <stdlib.h>
#include "libavcodec/aac_defines.h"
#define CONFIG_HARDCODED_TABLES 0
#define BUILD_TABLES
#if USE_FIXED
#define WRITE_FUNC write_int32_t_array