OpenSL ES更改音调

Question

我需要一些OpenSL ES的帮助 - 我想更改mp3歌曲的音高。我使用的代码在这里：Android : How to change Playback Rate of music using OpenSL ES但它在这个例子中被评论。如果我取消注释 - 它不起作用。 executint代码

result = (*uriPlayerObject)->GetInterface(uriPlayerObject, SL_IID_PITCH, 
      &uriPlaybackPitch); 
    assert(SL_RESULT_SUCCESS == result); 

uriPlaybackPitch == NULL之后

logcat的是：

OSLESMediaPlayer(7173): create engine 
OSLESMediaPlayer(7173): realize the engine 
OSLESMediaPlayer(7173): get the engine interface 
OSLESMediaPlayer(7173): create output mix 
libOpenSLES(7173): class OutputMix interface 0 requested but unavailable MPH=33 
OSLESMediaPlayer(7173): realize the output mix 
libOpenSLES(7173): Leaving Object::GetInterface (SL_RESULT_FEATURE_UNSUPPORTED) 
libOpenSLES(7173): Leaving PlaybackRate::SetPropertyConstraints (SL_RESULT_FEATURE_UNSUPPORTED) 
/OSLESMediaPlayer(7173): Feature Unsupported 
libc(7173): Fatal signal 11 (SIGSEGV) at 0x00000000 (code=1) 

Answer 1

真的晚了这里，也许你已经解决了它，但不支持该接口。 Android的OpenSL ES不是完整的实现。你可以在这里找到支持的接口：http://mobilepearls.com/labs/native-android-api/ndk/docs/opensles/