player.set(State::Stopped) blocking

[oomek]

Describe the bug
player.set(State::Stopped) is stalling for around 20 ms
player.set(State::Paused) does not
do you have any ide why?

Environment:

• OS: Win11
• GPU: RTX 3080

[wang-bin]

show me the log

[oomek]

> player->set(State::Stopped)
0000000009750DA0 player.set(0)
000000000F93D660 virtual void __cdecl mdk::MediaControlPush::setState(PlaybackState)@1077 requested state 1=>0, current state 1. status: 0X124
clear on stop
default FrameReader000000000F8E0E10 state: 1=>1=>0, 0
default000000000F8E0E10 stop, current state: , hhdrequested: 1
000000000F8E0E10 unload, current status 0x124, invalid: 0, loading: 0, loaded: 4, buffering: 0, seeking: 0, prepared: 256, EOF: 0
0000000009948188 request avformat input interrupt
000000001912A7E8 request to interrupt io operation
000000000F8E0E10 unload_requested_. skip sending packet
000000000F8E0E10 default FrameReader@000000000F8E0E10 unload requested, close io
free custome avio: 000000001052D0C0
000000001912A7C0 close url: D:/emu/mamedata/videos/236/jrpacman.mp4
62616default 000000000F8E0E10 update @1147: reset status_mask. status: 121
default 000000000F8E0E10 FrameReader::update MediaStatus 0X124=>0X1
FrameReader000000000F8E0E10 stop by user. clear packets, send eof for each loop
FrameReader@000000000F8E0E10 sending Packet::End to all packet queues. PacketIO@000000000F902C40 ->url: D:/emu/mamedata/videos/236/jrpacman.mp4
000000000F8E0E10 clear packet queue for stream 0
000000000F8E0E10 clear packet queue for stream 1
before changed() 1
default FrameReader000000000F8E0E10 state: 1=>0=>0, 0
000000000F8E0E10 unload, current status 0x1, invalid: 0, loading: 0, loaded: 0, buffering: 0, seeking: 0, prepared: 0, EOF: 0
EOS video frame of track 0
clear on stop
VideoFrame621@0.133466 to be destroyed is not rendered by  0000000009974C40
000000000F8E0E10 video stream#0 decoding loop is finished. packets: 2, pts: [0.000000, 0.000000]
EOS audio frame of track 0
000000000F8E0E10 audio stream#1 decoding loop is finished. packets: 2, pts: [0.000000, 0.000000]
default FrameReader000000000F8E0E10 state: 1=>0=>0, 1
default FrameReader000000000F8E0E10 update state: 1=>0
read thread finished: mdk.read@62616
clear on stop
> player->set(State::Stopped) elapsed: 27ms

[wang-bin]

you have to add time(including milliseconds) in each line via setLogHandler

[oomek]

I'm not sure how to do that. All I know is that setting State::Stopped or calling Player destructor is blocking ( 20-30ms ) so when I have a pool of Players switching media on navigation in my frontend it's causing frame drops.

[oomek]

Are you calling glFinish() by any chance in the Player destructor? I'm desperately trying to find a workaround for that delay.

[wang-bin]

You have to show me the timestamp of each log line, for example you can use this to print log in setLogHandler callback. Then I can know which how to reduce the delay.

Are you calling glFinish() by any chance in the Player destructor? I'm desperately trying to find a workaround for that delay.

with the latest sdk, if the destructor is called in a current gl context, glFinish() will be called, ohterwise it's impossible to call glFinish immediately. You can also manually release gl resources(and will call glFinish) when gl context is going to be destroyed like [this] if gl context lifetime is as shot as player(https://github.com/wang-bin/mdk-examples/blob/d041e1a772bce0e994ac20bda29566af55694765/Qt/QMDKWidget.cpp#L185-L192)