Messages

1

Audio / Re: AW: Music popping while playing encrypted OGG files

« on: September 20, 2016, 03:48:15 am »

At high CPU utilization it might also be that the music thread isn't getting enough CPU time.

Thanks for writing back! If this is the issue, is there anything I can do about it? Is there something like a buffer size I can increase?

I had seen elsewhere that Laurent posted that the music has a 1 second buffer. Is it possible that SFML waits long enough to replenish this buffer that a few miliseconds might make a difference?

IMO your decryption algorithm may be too slow, could you post it and some encrypted ogg file?

It's possible. Basically how it works is in my filestream's read() function, I call std::fread() to load up the desired amount of data, then I run through it and XOR it with a (looping) array of pre-computed values. Sounds pretty simple but who knows.

2

Audio / Music popping while playing encrypted OGG files

« on: September 18, 2016, 01:41:14 am »

Hey there! Thanks again for this great library! I have a game which uses SFML for audio, and I've had this odd problem for a few years now where the music makes a cracking / popping sound randomly.

The music is encoded in OGG files which are decrypted using a custom sf::InputStream as far as I can tell nothing is out of the ordinary there.

The weird thing is that this problem seems to be made worse with high CPU load. My game is eating up a lot of cycles, I guess. If I "relax" the CPU usage by calling Sleep() every once in a while, the problem is made better. Users with lower-spec machines tell me the problem is worse for them.

Can anyone help think of reasons why this could possibly be happening? I know that there is a problem with OGG files needing normalization, but I'm not sure if that's my problem as it doesn't sound random or affected by CPU load the way my issue does.

3

Audio / Re: Hang when playing second music with an sf::InputStream with 2.4

« on: August 26, 2016, 02:54:04 am »

Update: I have found that, instead of just stopping the sf::Music object, if I delete it and recreate it, then there is no hang. Previously the music object was stack-allocated and I just reused it for every song.

Still no idea why I was getting the hang. I'm trying to figure out whether I had screwed something up, but the interface is so simple it's hard to know what that might be.

4

Audio / Hang when playing second music with an sf::InputStream with 2.4

« on: August 26, 2016, 01:01:04 am »

I have a game that has been using SFML for a few years now (thank you!). I just upgraded to 2.4 (from 2.2) and I'm experiencing a new problem.

I have a custom sf::InputStream subclass which loads up encrypted music data from a stream and decrypts it for the audio system to play. This was working before the upgrade.

I have a single sf::Music object which I use to play all of my music. When one song is complete or I want to switch, I stop the music, close the input stream, then open a new file using the same stream and play the stream using the same music object.

So, when I start the game, the first music (the title music) plays just fine. However when I start gameplay and the title music switches to another song, the game freezes. Putting some breakpoints in the InputStream, I can see that read() is called a few times to load up some data. However then seek( 0 ) is called forever. The call to openFromStream() never returns and the program hangs.

Anyway I fully understand that this is probably an obscure problem on my end, but considering it was a new problem I thought it might be worth posting in case it was a known issue.