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avcodec: Do not lock during open for codecs marked as having threadsafe init 

Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Derek Buitenhuis 2015-10-01 15:36:56 +01:00 committed by Luca Barbato
parent abe9adfb31
commit eae58428bd
1 changed files with 21 additions and 17 deletions
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38
libavcodec/utils.c
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@ -845,20 +845,21 @@ int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *code
av_dict_copy(&tmp, *options, 0); av_dict_copy(&tmp, *options, 0);
/* If there is a user-supplied mutex locking routine, call it. */ /* If there is a user-supplied mutex locking routine, call it. */
if (lockmgr_cb) { if (!(codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE)) {
if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN)) if (lockmgr_cb) {
return -1; if ((*lockmgr_cb)(&codec_mutex, AV_LOCK_OBTAIN))
} return -1;
}
entangled_thread_counter++; entangled_thread_counter++;
if (entangled_thread_counter != 1 && if (entangled_thread_counter != 1) {
!(codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE)) { av_log(avctx, AV_LOG_ERROR,
av_log(avctx, AV_LOG_ERROR, "Insufficient thread locking. At least %d threads are "
"Insufficient thread locking. At least %d threads are " "calling avcodec_open2() at the same time right now.\n",
"calling avcodec_open2() at the same time right now.\n", entangled_thread_counter);
entangled_thread_counter); ret = -1;
ret = -1; goto end;
goto end; }
} }
avctx->internal = av_mallocz(sizeof(AVCodecInternal)); avctx->internal = av_mallocz(sizeof(AVCodecInternal));
@ -1085,12 +1086,15 @@ FF_ENABLE_DEPRECATION_WARNINGS
#endif #endif
} }
end: end:
entangled_thread_counter--; if (!(codec->caps_internal & FF_CODEC_CAP_INIT_THREADSAFE)) {
entangled_thread_counter--;
/* Release any user-supplied mutex. */ /* Release any user-supplied mutex. */
if (lockmgr_cb) { if (lockmgr_cb) {
(*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE); (*lockmgr_cb)(&codec_mutex, AV_LOCK_RELEASE);
}
} }
if (options) { if (options) {
av_dict_free(options); av_dict_free(options);
*options = tmp; *options = tmp;