# sound.readData blocking call on error when streaming **URL:** \ **Category:** Unity\ **Created:** [July 11, 2016, 2:25pm UTC](https://qa.fmod.com/t/sound-readdata-blocking-call-on-error-when-streaming/12582 "2016-07-11T14:25:43Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![r618](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/r618/32/36_2.png) [@r618](https://qa.fmod.com/u/r618)\ **Post date:** [July 11, 2016, 2:25pm UTC](https://qa.fmod.com/t/sound-readdata-blocking-call-on-error-when-streaming/12582/1 "2016-07-11T14:25:43Z")
Hi, I’m using the low level API C# wrapper in Unity to manually drive the streaming, such that: just a call to `createSound` no `playSound` and no `getChannel` calls manually retrieving decoded stream via `sound.readData` in a separate thread. Works almost for all situations as intended, except - `getOpenState` starving flag is unreliable (is not set) in this case - I’m using a workaround by monitoring the buffer percentage ( not, unfortunately 100% reliable, too ) but what is worse - `sound.readData` blocks on stream error - i.e. when the network is lost, or file playback is finished. On Windows, it seems like it is blocking on `WaitForSocket`call and never / until a timeout expires returns. Is there a way to inspect the stream condition other than by calling ‘getOpenState’ and / or a way to for `sound.readData`to actually return proper error code when there’s no data available in this scenario ? Thanks! ---
**Author:** ![nick1](https://avatars.discourse-cdn.com/v4/letter/n/47e85d/32.png) [@nick1](https://qa.fmod.com/u/nick1)\ **Post date:** [July 15, 2016, 4:46am UTC](https://qa.fmod.com/t/sound-readdata-blocking-call-on-error-when-streaming/12582/2 "2016-07-15T04:46:36Z")
Firstly the starving check only applies to **playing** streams. Can you give more details about your stream? I can’t repro a hang when a connection to a shoutcast server is closed while blocking in readData. ---
**Author:** ![r618](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/r618/32/36_2.png) [@r618](https://qa.fmod.com/u/r618)\ **Post date:** [July 15, 2016, 5:04am UTC](https://qa.fmod.com/t/sound-readdata-blocking-call-on-error-when-streaming/12582/3 "2016-07-15T05:04:10Z")
> [@](#): > > Firstly the starving check only applies to **playing** streams. > > Can you give more details about your stream? I can’t repro a hang when a connection to a shoutcast server is closed while blocking in readData. Hi Nicholas, thanks for reply ! I can live with starving flag being updated only for playing streams, no problem; It could be reproduced on practically any stream I’ve tried while testing - for example on somafm: [http://ice1.somafm.com/thetrip-128-mp3](http://ice1.somafm.com/thetrip-128-mp3) One note though: the readData is called on different thread than main thread. – i suppose that might be the problem. ( Unity has a special audio thread callback where current raw audio buffer can be accessed - I am using it to fill audio buffer with decoded stream data - it works without problems, except when the stream breaks… ) I wanted to test directly from e.g. netstream sample without c# wrapper, but I assumed that it would probably behave the same. If you fail to reproduce it again, I will try to setup FMOD5 test case. Thanks for looking into it once again! ---
**Author:** ![r618](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/r618/32/36_2.png) [@r618](https://qa.fmod.com/u/r618)\ **Post date:** [July 17, 2016, 5:50am UTC](https://qa.fmod.com/t/sound-readdata-blocking-call-on-error-when-streaming/12582/4 "2016-07-17T05:50:11Z")
Hello, I’ve managed to strip down everything to ~ 300 LOC and a single MonoBehaviour ( it’s basically adapted net\_stream from FMOD Studio API Windows lowlevel samples ). It’s reproducible every time the network disappears ( meaning physically unplugging the network cord / turning off WiFi, until the buffer is starved ) Tested with Unity 5.1 and 5.3 in the editor and win64 standalone builds. Is there any way to possibly send a repro case / some other approriate way ? Thanks! ---
**Author:** ![nick1](https://avatars.discourse-cdn.com/v4/letter/n/47e85d/32.png) [@nick1](https://qa.fmod.com/u/nick1)\ **Post date:** [July 18, 2016, 1:52am UTC](https://qa.fmod.com/t/sound-readdata-blocking-call-on-error-when-streaming/12582/5 "2016-07-18T01:52:18Z")
We don’t have anything for public uploads. You can host it yourself and send us the link to [support@fmod.org](mailto:support@fmod.org), or it’s small enough it can be sent as an attachment. ---
**Author:** ![r618](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/r618/32/36_2.png) [@r618](https://qa.fmod.com/u/r618)\ **Post date:** [July 18, 2016, 9:04am UTC](https://qa.fmod.com/t/sound-readdata-blocking-call-on-error-when-streaming/12582/6 "2016-07-18T09:04:15Z")
Thanks, email sent. ---
**Author:** ![nick1](https://avatars.discourse-cdn.com/v4/letter/n/47e85d/32.png) [@nick1](https://qa.fmod.com/u/nick1)\ **Post date:** [July 22, 2016, 6:31am UTC](https://qa.fmod.com/t/sound-readdata-blocking-call-on-error-when-streaming/12582/7 "2016-07-22T06:31:59Z")
We’ve reproduced the issue. We’re trying to find the best solution across all our platforms. Edit: This will be fixed in 1.08.09 which will be released early August. ---
**Author:** ![r618](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/r618/32/36_2.png) [@r618](https://qa.fmod.com/u/r618)\ **Post date:** [July 22, 2016, 12:30pm UTC](https://qa.fmod.com/t/sound-readdata-blocking-call-on-error-when-streaming/12582/8 "2016-07-22T12:30:18Z")
> [@](#): > > We’ve reproduced the issue. We’re trying to find the best solution across all our platforms. > > Edit: This will be fixed in 1.08.09 which will be released early August. Awesome, thanks for the info. ---
**Author:** ![nick1](https://avatars.discourse-cdn.com/v4/letter/n/47e85d/32.png) [@nick1](https://qa.fmod.com/u/nick1)\ **Post date:** [July 27, 2016, 3:52am UTC](https://qa.fmod.com/t/sound-readdata-blocking-call-on-error-when-streaming/12582/9 "2016-07-27T03:52:06Z")
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