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| author | Andreas Rheinhardt <andreas.rheinhardt@gmail.com> | 2020-11-23 04:57:03 +0100 |
|---|---|---|
| committer | Andreas Rheinhardt <andreas.rheinhardt@gmail.com> | 2020-12-08 17:51:48 +0100 |
| commit | 14be39e44a7dd5f378e93a9fea0e1ca1e6eba9d6 (patch) | |
| tree | 54d72c16947606a2bae54b2a19fabf2eaa9d68e5 /libavcodec/ivi.c | |
| parent | ee4c129c11a195fa604e4d940e92c36b7425dafa (diff) | |
| download | ffmpeg-14be39e44a7dd5f378e93a9fea0e1ca1e6eba9d6.tar.gz | |
avcodec/ivi: Make initializing VLCs thread-safe
This automatically makes indeo4/5 init-threadsafe.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Diffstat (limited to 'libavcodec/ivi.c')
| -rw-r--r-- | libavcodec/ivi.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/libavcodec/ivi.c b/libavcodec/ivi.c index 5e1180a5f0..a5074e9980 100644 --- a/libavcodec/ivi.c +++ b/libavcodec/ivi.c @@ -30,6 +30,7 @@ #include "libavutil/attributes.h" #include "libavutil/imgutils.h" +#include "libavutil/thread.h" #define BITSTREAM_READER_LE #include "avcodec.h" @@ -157,14 +158,11 @@ static int ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag) (flag ? INIT_VLC_USE_NEW_STATIC : 0) | INIT_VLC_OUTPUT_LE); } -av_cold void ff_ivi_init_static_vlc(void) +static av_cold void ivi_init_static_vlc(void) { int i; static VLC_TYPE table_data[8192 * 16][2]; - static int initialized_vlcs = 0; - if (initialized_vlcs) - return; for (i = 0; i < 8; i++) { ivi_mb_vlc_tabs[i].table = table_data + i * 2 * 8192; ivi_mb_vlc_tabs[i].table_allocated = 8192; @@ -175,7 +173,12 @@ av_cold void ff_ivi_init_static_vlc(void) ivi_create_huff_from_desc(&ivi_blk_huff_desc[i], &ivi_blk_vlc_tabs[i], 1); } - initialized_vlcs = 1; +} + +av_cold void ff_ivi_init_static_vlc(void) +{ + static AVOnce init_static_once = AV_ONCE_INIT; + ff_thread_once(&init_static_once, ivi_init_static_vlc); } /* |