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avcodec/msmpeg4dec: Make initializing VLCs thread-safe

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This automatically makes the remaining mpegvideo-decoders
(namely msmpeg4v[1-3], mss2, VC-1, VC-1 Image, WMV-[1-3]
and WMV-3 Image) init-threadsafe.
These were the last native codecs that were not init-threadsafe;
only wrappers for external libraries and for hardware accelerations
are now not init-threadsafe.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-02-11 20:40:59 +01:00
parent 23b17f96f7
commit 569a0d0012
4 changed files with 34 additions and 20 deletions
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47
libavcodec/msmpeg4dec.c
View File

@ -22,6 +22,8 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/thread.h"
#include "avcodec.h"
#include "internal.h"
#include "mpegutils.h"
@ -293,22 +295,10 @@ static int msmpeg4v34_decode_mb(MpegEncContext *s, int16_t block[6][64])
}
/* init all vlc decoding tables */
av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx)
static av_cold void msmpeg4_decode_init_static(void)
{
MpegEncContext *s = avctx->priv_data;
static volatile int done = 0;
int ret;
MVTable *mv;
if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
return ret;
if (ff_h263_decode_init(avctx) < 0)
return -1;
ff_msmpeg4_common_init(s);
if (!done) {
INIT_FIRST_VLC_RL(ff_rl_table[0], 642);
INIT_FIRST_VLC_RL(ff_rl_table[1], 1104);
INIT_FIRST_VLC_RL(ff_rl_table[2], 554);
@ -373,8 +363,21 @@ av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx)
INIT_VLC_STATIC(&ff_inter_intra_vlc, INTER_INTRA_VLC_BITS, 4,
&ff_table_inter_intra[0][1], 2, 1,
&ff_table_inter_intra[0][0], 2, 1, 8);
done = 1;
}
}
av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx)
{
static AVOnce init_static_once = AV_ONCE_INIT;
MpegEncContext *s = avctx->priv_data;
int ret;
if ((ret = av_image_check_size(avctx->width, avctx->height, 0, avctx)) < 0)
return ret;
if (ff_h263_decode_init(avctx) < 0)
return -1;
ff_msmpeg4_common_init(s);
switch(s->msmpeg4_version){
case 1:
@ -395,6 +398,8 @@ av_cold int ff_msmpeg4_decode_init(AVCodecContext *avctx)
s->slice_height= s->mb_height; //to avoid 1/0 if the first frame is not a keyframe
ff_thread_once(&init_static_once, msmpeg4_decode_init_static);
return 0;
}
@ -867,7 +872,8 @@ const AVCodec ff_msmpeg4v1_decoder = {
.close = ff_h263_decode_end,
.decode = ff_h263_decode_frame,
.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
.max_lowres = 3,
.pix_fmts = (const enum AVPixelFormat[]) {
AV_PIX_FMT_YUV420P,
@ -885,7 +891,8 @@ const AVCodec ff_msmpeg4v2_decoder = {
.close = ff_h263_decode_end,
.decode = ff_h263_decode_frame,
.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
.max_lowres = 3,
.pix_fmts = (const enum AVPixelFormat[]) {
AV_PIX_FMT_YUV420P,
@ -903,7 +910,8 @@ const AVCodec ff_msmpeg4v3_decoder = {
.close = ff_h263_decode_end,
.decode = ff_h263_decode_frame,
.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
.max_lowres = 3,
.pix_fmts = (const enum AVPixelFormat[]) {
AV_PIX_FMT_YUV420P,
@ -921,7 +929,8 @@ const AVCodec ff_wmv1_decoder = {
.close = ff_h263_decode_end,
.decode = ff_h263_decode_frame,
.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
.max_lowres = 3,
.pix_fmts = (const enum AVPixelFormat[]) {
AV_PIX_FMT_YUV420P,

1
libavcodec/mss2.c
View File

@ -856,4 +856,5 @@ const AVCodec ff_mss2_decoder = {
.close = mss2_decode_end,
.decode = mss2_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};

4
libavcodec/vc1dec.c
View File

@ -1210,6 +1210,7 @@ const AVCodec ff_vc1_decoder = {
.decode = vc1_decode_frame,
.flush = ff_mpeg_flush,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
.pix_fmts = vc1_hwaccel_pixfmt_list_420,
.hw_configs = (const AVCodecHWConfigInternal *const []) {
#if CONFIG_VC1_DXVA2_HWACCEL
@ -1247,6 +1248,7 @@ const AVCodec ff_wmv3_decoder = {
.decode = vc1_decode_frame,
.flush = ff_mpeg_flush,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
.pix_fmts = vc1_hwaccel_pixfmt_list_420,
.hw_configs = (const AVCodecHWConfigInternal *const []) {
#if CONFIG_WMV3_DXVA2_HWACCEL
@ -1284,6 +1286,7 @@ const AVCodec ff_wmv3image_decoder = {
.close = ff_vc1_decode_end,
.decode = vc1_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
.flush = vc1_sprite_flush,
.pix_fmts = (const enum AVPixelFormat[]) {
AV_PIX_FMT_YUV420P,
@ -1303,6 +1306,7 @@ const AVCodec ff_vc1image_decoder = {
.close = ff_vc1_decode_end,
.decode = vc1_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
.flush = vc1_sprite_flush,
.pix_fmts = (const enum AVPixelFormat[]) {
AV_PIX_FMT_YUV420P,

2
libavcodec/wmv2dec.c
View File

@ -601,7 +601,7 @@ const AVCodec ff_wmv2_decoder = {
.close = wmv2_decode_end,
.decode = ff_h263_decode_frame,
.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1,
.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 },
};