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Use ff_thread_once for fixed, float table init.

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These tables are static so they should only be initialized once
instead of on every call to ff_mpadsp_init().

Signed-off-by: Dale Curtis <dalecurtis@chromium.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Dale Curtis 2017-11-17 14:51:09 -08:00 committed by Michael Niedermayer
parent d073be2291
commit 5eaaffaf64
1 changed files with 6 additions and 2 deletions
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8
libavcodec/mpegaudiodsp.c
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@ -20,17 +20,21 @@
#include "config.h"
#include "libavutil/attributes.h"
#include "libavutil/thread.h"
#include "mpegaudiodsp.h"
#include "dct.h"
#include "dct32.h"
static AVOnce mpadsp_float_table_init = AV_ONCE_INIT;
static AVOnce mpadsp_fixed_table_init = AV_ONCE_INIT;
av_cold void ff_mpadsp_init(MPADSPContext *s)
{
DCTContext dct;
ff_dct_init(&dct, 5, DCT_II);
ff_init_mpadsp_tabs_float();
ff_init_mpadsp_tabs_fixed();
ff_thread_once(&mpadsp_float_table_init, &ff_init_mpadsp_tabs_float);
ff_thread_once(&mpadsp_fixed_table_init, &ff_init_mpadsp_tabs_fixed);
s->apply_window_float = ff_mpadsp_apply_window_float;
s->apply_window_fixed = ff_mpadsp_apply_window_fixed;