[英]Playing buffer in ObjectAL
I am new to ObjectAL. 我是ObjectAL的新手。 I use it to play mp3 with changed pitch.
我用它来改变音高播放mp3。
I cannot figure out how to "properly" play a loaded buffer in ObjectAL. 我无法弄清楚如何“正确”播放ObjectAL中的已加载缓冲区。 When I call
[source play:buffer]
the sound only comes a fraction of a second. 当我调用
[source play:buffer]
,声音只有不到一秒钟。 To constantly "play" a buffer I can embed it in infinite loop and then the buffer is played correctly. 为了不断“播放”缓冲区,我可以将其嵌入无限循环中,然后正确播放缓冲区。 I assume I miss some fundamental point, can you point me in the right direction?
我想我错过了一些基本要点,您能指出我正确的方向吗?
My code: 我的代码:
[OALSimpleAudio sharedInstance].reservedSources = 0;
ALSource *source = [ALSource source];
ALBuffer *buffer = [[OpenALManager sharedInstance] bufferFromFile:@"video.mp3" reduceToMono:YES];
source.pitch = 1;
for (;;) { // infinite loop because otherwise only a millisecond of buffer is played
[source play:buffer];
}
Calling pitchTo
or similar function actually makes the buffer play constantly, fx: 实际上,调用
pitchTo
或类似函数会使缓冲区不断播放fx:
[source pitchTo:1 duration:1 target:nil selector:nil];
This does not qualify as a perfect explanation, however at least it solves the problem. 这不能作为完美的解释,但是至少可以解决问题。
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