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author | Andreas Rheinhardt <andreas.rheinhardt@gmail.com> | 2020-12-10 07:26:31 +0100 |
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committer | Andreas Rheinhardt <andreas.rheinhardt@outlook.com> | 2021-04-27 00:45:05 +0200 |
commit | f4d16c3865b478b3619021bbf5b9827f99a8f710 (patch) | |
tree | 12386eb75988241ad33a3936d9f9c428a36ec844 /libavcodec/msmpeg4enc.c | |
parent | 1d5d666601b6dc9319f8a539c40d016e3aef932e (diff) | |
download | ffmpeg-f4d16c3865b478b3619021bbf5b9827f99a8f710.tar.gz |
avcodec/msmpeg4enc: Make msmpeg4 encoders init-threadsafe
Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Diffstat (limited to 'libavcodec/msmpeg4enc.c')
-rw-r--r-- | libavcodec/msmpeg4enc.c | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/libavcodec/msmpeg4enc.c b/libavcodec/msmpeg4enc.c index e22e8107ad..73a5ea09dd 100644 --- a/libavcodec/msmpeg4enc.c +++ b/libavcodec/msmpeg4enc.c @@ -32,6 +32,7 @@ #include "libavutil/attributes.h" #include "libavutil/avutil.h" +#include "libavutil/thread.h" #include "mpegvideo.h" #include "h263.h" #include "internal.h" @@ -72,7 +73,9 @@ void ff_msmpeg4_code012(PutBitContext *pb, int n) } } -static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra){ +static int get_size_of_code(const RLTable *rl, int last, int run, + int level, int intra) +{ int size=0; int code; int run_diff= intra ? 0 : 1; @@ -113,21 +116,10 @@ static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, return size; } -av_cold void ff_msmpeg4_encode_init(MpegEncContext *s) +static av_cold void msmpeg4_encode_init_static(void) { - static int init_done=0; int i; - - ff_msmpeg4_common_init(s); - if(s->msmpeg4_version>=4){ - s->min_qcoeff= -255; - s->max_qcoeff= 255; - } - - if (!init_done) { static uint16_t mv_index_tables[2][4096]; - /* init various encoding tables */ - init_done = 1; init_mv_table(&ff_mv_tables[0], mv_index_tables[0]); init_mv_table(&ff_mv_tables[1], mv_index_tables[1]); @@ -138,12 +130,25 @@ av_cold void ff_msmpeg4_encode_init(MpegEncContext *s) for(run=0; run<=MAX_RUN; run++){ int last; for(last=0; last<2; last++){ - rl_length[i][level][run][last]= get_size_of_code(s, &ff_rl_table[ i], last, run, level, 0); + rl_length[i][level][run][last] = get_size_of_code(&ff_rl_table[i], last, run, level, 0); } } } } +} + +av_cold void ff_msmpeg4_encode_init(MpegEncContext *s) +{ + static AVOnce init_static_once = AV_ONCE_INIT; + + ff_msmpeg4_common_init(s); + if (s->msmpeg4_version >= 4) { + s->min_qcoeff = -255; + s->max_qcoeff = 255; } + + /* init various encoding tables */ + ff_thread_once(&init_static_once, msmpeg4_encode_init_static); } static void find_best_tables(MpegEncContext * s) |