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Fixed a deadlock in PlaybackService when changing tracks from an IPlaybackRemote.

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This commit is contained in:
casey langen 2017-02-03 08:13:28 +00:00
parent 482433e5da
commit bc87e4d28c
1 changed files with 27 additions and 22 deletions
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49
src/core/audio/PlaybackService.cpp
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@ -255,32 +255,35 @@ void PlaybackService::ProcessMessage(IMessage &message) {
int64 eventType = streamMessage->GetEventType();
if (eventType == StreamPlaying) {
if (this->nextIndex != NO_POSITION) {
/* in most cases when we get here it means that the next track is
starting, so we want to update our internal index. however, because
things are asynchronous, this may not always be the case, especially if
the tracks are very short, or the user is advancing through songs very
quickly. make compare the track URIs before we update internal state. */
if (this->nextIndex >= this->Count()) {
this->nextIndex = NO_POSITION;
this->transport.PrepareNextTrack("");
return;
TrackPtr track;
{
std::unique_lock<std::recursive_mutex> lock(this->playlistMutex);
if (this->nextIndex != NO_POSITION) {
/* in most cases when we get here it means that the next track is
starting, so we want to update our internal index. however, because
things are asynchronous, this may not always be the case, especially if
the tracks are very short, or the user is advancing through songs very
quickly. make compare the track URIs before we update internal state. */
if (this->nextIndex >= this->Count()) {
this->nextIndex = NO_POSITION;
this->transport.PrepareNextTrack("");
return;
}
if (this->GetTrackAtIndex(this->nextIndex)->Uri() == streamMessage->GetUri()) {
this->index = this->nextIndex;
this->nextIndex = NO_POSITION;
}
}
if (this->GetTrackAtIndex(this->nextIndex)->Uri() == streamMessage->GetUri()) {
this->index = this->nextIndex;
this->nextIndex = NO_POSITION;
if (this->index != NO_POSITION) {
track = this->playlist.Get(this->index);
}
}
if (this->index != NO_POSITION) {
TrackPtr track;
{
std::unique_lock<std::recursive_mutex> lock(this->playlistMutex);
track = this->playlist.Get(this->index);
}
if (track) {
this->OnTrackChanged(this->index, track);
}
@ -364,6 +367,8 @@ bool PlaybackService::Previous() {
return false;
}
std::unique_lock<std::recursive_mutex> lock(this->playlistMutex);
if (transport.Position() > PREVIOUS_GRACE_PERIOD) {
this->Play(index);
return true;
@ -724,4 +729,4 @@ std::string PlaybackService::UriAtIndex(size_t index) {
return track->Uri();
}
return "";
}
}