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Merge "media: fix race condition on async release" into rvc-dev am: 7e1b558949

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Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11927284

Change-Id: I76abd4518054a2fa8783c063709c4f7aef79a0f2
This commit is contained in:
Wonsik Kim
2020-06-20 00:49:48 +00:00
committed by Automerger Merge Worker
parent 6affc2707b 7e1b558949
commit fddc33a377
1 changed files with 15 additions and 6 deletions
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21
media/jni/android_media_MediaCodec.cpp
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@@ -235,7 +235,10 @@ void JMediaCodec::release() {
void JMediaCodec::releaseAsync() {
std::call_once(mAsyncReleaseFlag, [this] {
if (mCodec != NULL) {
mCodec->releaseAsync(new AMessage(kWhatAsyncReleaseComplete, this));
sp<AMessage> notify = new AMessage(kWhatAsyncReleaseComplete, this);
// Hold strong reference to this until async release is complete
notify->setObject("this", this);
mCodec->releaseAsync(notify);
}
mInitStatus = NO_INIT;
});
@@ -1088,8 +1091,11 @@ void JMediaCodec::onMessageReceived(const sp<AMessage> &msg) {
}
case kWhatAsyncReleaseComplete:
{
mCodec.clear();
mLooper->stop();
if (mLooper != NULL) {
mLooper->unregisterHandler(id());
mLooper->stop();
mLooper.clear();
}
break;
}
default:
@@ -1104,7 +1110,7 @@ void JMediaCodec::onMessageReceived(const sp<AMessage> &msg) {
using namespace android;
static sp<JMediaCodec> setMediaCodec(
JNIEnv *env, jobject thiz, const sp<JMediaCodec> &codec) {
JNIEnv *env, jobject thiz, const sp<JMediaCodec> &codec, bool release = true) {
sp<JMediaCodec> old = (JMediaCodec *)env->CallLongMethod(thiz, gFields.lockAndGetContextID);
if (codec != NULL) {
codec->incStrong(thiz);
@@ -1115,7 +1121,9 @@ static sp<JMediaCodec> setMediaCodec(
* its message handler, doing release() from there will deadlock
* (as MediaCodec::release() post synchronous message to the same looper)
*/
old->release();
if (release) {
old->release();
}
old->decStrong(thiz);
}
env->CallVoidMethod(thiz, gFields.setAndUnlockContextID, (jlong)codec.get());
@@ -1130,7 +1138,8 @@ static sp<JMediaCodec> getMediaCodec(JNIEnv *env, jobject thiz) {
}
static void android_media_MediaCodec_release(JNIEnv *env, jobject thiz) {
sp<JMediaCodec> codec = getMediaCodec(env, thiz);
// Clear Java native reference.
sp<JMediaCodec> codec = setMediaCodec(env, thiz, nullptr, false /* release */);
if (codec != NULL) {
codec->releaseAsync();
}