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avcodec/ituh263enc: Make static initializations thread-safe

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This already makes several encoders (namely FLV, H.263, H.263+ and
RealVideo 1.0 and 2.0 and SVQ1) that use this init-threadsafe.

It also makes the Snow encoder init-threadsafe; it was already marked
as such since commit d49210788b, because
it was thought to be harmless if one and the same object was
initialized by multiple threads at the same time.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-12-02 01:58:09 +01:00 committed by Andreas Rheinhardt
parent ad184c8e36
commit fea1f42e5f
6 changed files with 24 additions and 20 deletions
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2
libavcodec/flvenc.c
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@ -107,7 +107,7 @@ AVCodec ff_flv_encoder = {
.init = ff_mpv_encode_init,
.encode2 = ff_mpv_encode_picture,
.close = ff_mpv_encode_end,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
AV_PIX_FMT_NONE},
.priv_class = &flv_class,

32
libavcodec/ituh263enc.c
View File

@ -30,6 +30,7 @@
#include <limits.h>
#include "libavutil/attributes.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "mpegvideo.h"
#include "mpegvideodata.h"
@ -671,7 +672,7 @@ void ff_h263_encode_motion(PutBitContext *pb, int val, int f_code)
}
}
static av_cold void init_mv_penalty_and_fcode(MpegEncContext *s)
static av_cold void init_mv_penalty_and_fcode(void)
{
int f_code;
int mv;
@ -754,22 +755,23 @@ static av_cold void init_uni_h263_rl_tab(const RLTable *rl, uint8_t *len_tab)
}
}
static av_cold void h263_encode_init_static(void)
{
static uint8_t rl_intra_table[2][2 * MAX_RUN + MAX_LEVEL + 3];
ff_rl_init(&ff_rl_intra_aic, rl_intra_table);
ff_h263_init_rl_inter();
init_uni_h263_rl_tab(&ff_rl_intra_aic, uni_h263_intra_aic_rl_len);
init_uni_h263_rl_tab(&ff_h263_rl_inter, uni_h263_inter_rl_len);
init_mv_penalty_and_fcode();
}
av_cold void ff_h263_encode_init(MpegEncContext *s)
{
static int done = 0;
static AVOnce init_static_once = AV_ONCE_INIT;
if (!done) {
static uint8_t rl_intra_table[2][2 * MAX_RUN + MAX_LEVEL + 3];
done = 1;
ff_rl_init(&ff_rl_intra_aic, rl_intra_table);
ff_h263_init_rl_inter();
init_uni_h263_rl_tab(&ff_rl_intra_aic, uni_h263_intra_aic_rl_len);
init_uni_h263_rl_tab(&ff_h263_rl_inter, uni_h263_inter_rl_len);
init_mv_penalty_and_fcode(s);
}
s->me.mv_penalty= mv_penalty; // FIXME exact table for MSMPEG4 & H.263+
s->intra_ac_vlc_length =s->inter_ac_vlc_length = uni_h263_inter_rl_len;
@ -817,6 +819,8 @@ av_cold void ff_h263_encode_init(MpegEncContext *s)
s->y_dc_scale_table=
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
}
ff_thread_once(&init_static_once, h263_encode_init_static);
}
void ff_h263_encode_mba(MpegEncContext *s)

4
libavcodec/mpegvideo_enc.c
View File

@ -4738,7 +4738,7 @@ AVCodec ff_h263_encoder = {
.init = ff_mpv_encode_init,
.encode2 = ff_mpv_encode_picture,
.close = ff_mpv_encode_end,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
.pix_fmts= (const enum AVPixelFormat[]){AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE},
.priv_class = &h263_class,
};
@ -4774,7 +4774,7 @@ AVCodec ff_h263p_encoder = {
.encode2 = ff_mpv_encode_picture,
.close = ff_mpv_encode_end,
.capabilities = AV_CODEC_CAP_SLICE_THREADS,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
.priv_class = &h263p_class,
};

2
libavcodec/rv10enc.c
View File

@ -79,7 +79,7 @@ AVCodec ff_rv10_encoder = {
.init = ff_mpv_encode_init,
.encode2 = ff_mpv_encode_picture,
.close = ff_mpv_encode_end,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
.priv_class = &rv10_class,
};

2
libavcodec/rv20enc.c
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@ -76,7 +76,7 @@ AVCodec ff_rv20_encoder = {
.init = ff_mpv_encode_init,
.encode2 = ff_mpv_encode_picture,
.close = ff_mpv_encode_end,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
.priv_class = &rv20_class,
};

2
libavcodec/svq1enc.c
View File

@ -688,7 +688,7 @@ AVCodec ff_svq1_encoder = {
.init = svq1_encode_init,
.encode2 = svq1_encode_frame,
.close = svq1_encode_end,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV410P,
AV_PIX_FMT_NONE },
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
};