Question

我需要一些OpenSL ES的帮助 - 我想改变mp3歌曲的音调。我使用的代码在这里：Android : How to change Playback Rate of music using OpenSL ES但是在这个例子中它被注释了。如果我取消注释它 - 它将无法工作。在执行代码之后

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

uriPlaybackPitch == NULL

LogCat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

这里真的很晚，也许你已经解决了，但是不支持该界面。 OpenSL ES for Android不是一个完整的实现。您可以在此处找到支持的界面：http://mobilepearls.com/labs/native-android-api/ndk/docs/opensles/

Answer 2

NDK文档概述了Android支持的接口。

OpenSL ES改变音高

2 个答案: