CocosDenshion update « cocos2d for iPhone

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CocosDenshion update

(102 posts) (19 voices)

Started 1 year ago by Steve Oldmeadow
Latest reply from Steve Oldmeadow

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jonathan0382
Member

Director I am familiar with :D Thank you for the advice!

I just put the code in my app to test it. I made it so that when you toggle something on the menu (with menuscene) then it clicks. It does click, but the first time I press the toggle it also pauses/freezes for about a second first. I assume I need to preload/buffer the sounds beforehand. Using preloadEffect, or something *looks at the SimpleAudioEngine.m* aha! preloadEffect is what I'm looking for.
EDITED: ignore the above, the preload works great.

I don't see anything in there for volume. Can these be changed on the fly?

Posted 1 year ago #
Steve Oldmeadow
Administrator

You can call playEffect with gain settings if you want to change the volume of individual sounds. There is no way to adjust the volume of the background music or the master gain of the sound engine at the moment. The user can, of course, use the hardware volume controls to adjust the volume.

If you want these features you can raise an issue. They are easy to add but we don't want to complicate the interface so much that it no longer lives up to its name. Joao Caxaria designed SimpleAudioEngine so I leave it up to him to decide what features are added.

Posted 1 year ago #
jonathan0382
Member

I understand what you mean about not wanting to complicate the interface. It is clearly designed to be simple, and simple it is. I'm fairly new to all this and I could easily change the code to suit my needs.

Concerning calling playEffect with gain settings on an effect to effect basis, I don't see how, as the playEffect method is not passed a gain value. Seems to me the gain is set at 1.0.

-(ALuint) playEffect:(NSString*) filename
{
NSNumber* soundId = (NSNumber*)[loadedEffects objectForKey:filename];

if(soundId == nil)
{
#ifdef ASSERT_DEBUG
@throw [[[NSException alloc] initWithName:@"SimpleAudioEngine::playEffect" reason:filename userInfo:nil] autorelease];
#else
[self preloadEffect:filename];
#endif
}

return [soundEngine playSound:[soundId intValue] channelGroupId:0 pitch:1.0f pan:0 gain:1.0f loop:false];
}

Posted 1 year ago #
Steve Oldmeadow
Administrator

@jonathan, there is another version of playEffect that accepts pan, gain and pitch settings. Maybe you need a newer version, it was a fairly recent change.

However, I've had a think about this and have proposed adding setBackgroundMusicVolume and setEffectsVolume properties to Joao. If he is happy with that I'll add those in asap.

Posted 1 year ago #
jonathan0382
Member

Sounds great.

I just downloaded and had a look through the latest RC and the plafEffect with gain and other options is in there. I'll definitely upgrade.

Thanks Steve for your excellent help. I'll reserve a promo code for you when my game gets released in a couple of weeks.

Posted 1 year ago #
Steve Oldmeadow
Administrator

Latest version of SimpleAudioEngine.* now has support for backgroundMusicVolume and effectsVolume properties. They are floats with a range of 0.0f to 1.0f.

@jonathan - I can't use promo codes as I'm in Australia but thanks for the thought.

Posted 1 year ago #
leftright
Member

I tried integrating MediaPicker and then have MPMusicPlayerController play the media content that the user picks but when MPMusicPlayerController is playing, my sound effects doesn't play. Reading up more on the iPhone SDK seem to indicated that the AudioSession API is required to setup mixing correctly. It looks like CocosDenshion does not support mixing yet, is this correct?

From SDK Doc
iPhone OS has seven audio session categories. The first and second in this list indicate that your application’s audio is to mix with any other audio that may be present. These two categories also indicate that you want your audio to be silenced according to the setting of the iPhone Ring/Silent switch and when the screen locks:

kAudioSessionCategory_UserInterfaceSoundEffects—For brief sound effects, such as explosions in a game or tap feedback.
kAudioSessionCategory_AmbientSound—For longer-duration sounds, such as rain, engine noise, or bird songs. You also use this category if your application provides a virtual musical instrument, say a piano, and you want to let the user play it along to iPod audio.

Posted 9 months ago #
Steve Oldmeadow
Administrator

^ Check this out:

http://www.cocos2d-iphone.org/forum/topic/1366#post-8218

Posted 9 months ago #
leftright
Member

I was searching for kAudioSessionCategory_AmbientSound in the cocosDenshion initialization code, but did not find anything. Instead there was tAudioManagerMode and I used kAudioManagerFx and that seem to work well with playing my game sound effects and the MPMusicPlayerController playing as the background music.

Thanks!

Posted 9 months ago #
Steve Oldmeadow
Administrator

^CDAudioManager handles the audio session stuff. If you use CDSoundEngine then you need to handle the audio session yourself but you can pass an audio session category during initialisation that CDSoundEngine will use when it handles audio session interruption.

Posted 9 months ago #
leftright
Member

@Steve, I see what you are saying with CDSoundEngine. I was using CDAudioManger because I have my own background music, and so that set up an audio session with kAudioSessionCategory_AmbientSound. But when it was set to kAudioSessionCategory_AmbientSound, I could not play my own background music. So I was looking for a way to send a new audio session when the user picks ipod library and plays their own song. And it looks like there is no way to send audio sessions with a new audio session category based on my users selection since that was send at init?

Posted 9 months ago #
Steve Oldmeadow
Administrator

^ you can call the audio session category stuff yourself. Look at what happens when the audio session gets resumed, the category gets set. From memory, you must deactivate and reactivate the audio session for the category change to work. There is also the new AVAudioSession class in 3.x if you are only targeting 3.x.

However, I would have expected that everything would work with AmbientSound as that should mix with other audio. Are you using the system music player of the application music player when you let the user choose their music? If you use the system music player then it should work just the same as if the user had music playing on the iPod when they started the app.

Posted 9 months ago #

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