使用 Renderscript 支持库为不同平台获取不同的错误

Question

我在尝试实现一些用 Renderscript for Android 编写的代码时遇到了不同的麻烦。 首先让我说我所有的 SDK 包都是最新的 22.3 版本，包括 Ecplise ADT 和 Build-Tools 19.0.0。

我的目的是在各种 Android 平台上实现一些高计算图像算法，可能从 API 8 开始。为此，我在我的 Ecplise 项目中设置了对 renderscript-v8 库的引用，同时针对API 19 的应用程序。

我有两台 Android 设备要测试，第一台是 Android 4.3 (API 18)，第二台是 Android 2.2 (API 8)。我在运行这段代码时遇到了不同的异常，它调用ScriptIntrinsicYuvToRGB（代码部分取自Executing ScriptIntrinsicYuvToRgb问题）：

/* --------------
   global vars */

private RenderScript rs;
private ScriptIntrinsicYuvToRGB rs_YUVtoRGB;
private Allocation rs_YUVtoRGB_in;
private Allocation rs_YUVtoRGB_out;  

/* --------------
in constructor... */

this.rs = RenderScript.create(this.getContext());
this.rs_YUVtoRGB = ScriptIntrinsicYuvToRGB.create(this.rs, Element.U8_4(rs));

Type.Builder tb_in = new Type.Builder(this.rs, Element.createPixel(this.rs, Element.DataType.UNSIGNED_8, Element.DataKind.PIXEL_YUV));
tb_in.setX(prevWidth);
tb_in.setY(prevHeight);
tb_in.setMipmaps(false);
tb_in.setYuvFormat(this.camera.getParameters().getPreviewFormat());
this.rs_YUVtoRGB_in = Allocation.createTyped(this.rs, tb_in.create(), Allocation.USAGE_SCRIPT);

Type.Builder tb_out = new Type.Builder(this.rs, Element.RGBA_8888(this.rs));
tb_out.setX(prevWidth);
tb_out.setY(prevHeight);
tb_out.setMipmaps(false);
this.rs_YUVtoRGB_out = Allocation.createTyped (this.rs, tb_out.create(), Allocation.USAGE_SCRIPT);

/* --------------
launching the script... */

// byte[] raw... // a YUV image

this.rs_YUVtoRGB_in.copyFrom(raw);
this.rs_YUVtoRGB.setInput(this.rs_YUVtoRGB_in);
this.rs_YUVtoRGB.forEach(this.rs_YUVtoRGB_out);

int[] framePixels = new int[previewSize.width * previewSize.height];
this.rs_YUVtoRGB_out.copyTo(framePixels);  // final RGB converted image

Eclipse 设法编译它（这应该意味着该库被很好地引用了），但是...

Android 4.3 失败：Type.Builder tb_in = new Type.Builder(this.rs, Element.createPixel(this.rs, Element.DataType.UNSIGNED_8, Element.DataKind.PIXEL_YUV)); 和 Unsupported DataKind

11-24 11:17:57.685: E/AndroidRuntime(2494): FATAL EXCEPTION: main
11-24 11:17:57.685: E/AndroidRuntime(2494): android.renderscript.RSIllegalArgumentException: Unsupported DataKind
11-24 11:17:57.685: E/AndroidRuntime(2494):     at android.renderscript.Element.createPixel(Element.java:911)
11-24 11:17:57.685: E/AndroidRuntime(2494):     at android.support.v8.renderscript.ElementThunker.createPixel(ElementThunker.java:224)
11-24 11:17:57.685: E/AndroidRuntime(2494):     at android.support.v8.renderscript.Element.createPixel(Element.java:832)
11-24 11:17:57.685: E/AndroidRuntime(2494):     at com.lag.appprj.CameraPreview.setupCamera(CameraPreview.java:167)
11-24 11:17:57.685: E/AndroidRuntime(2494):     at com.lag.appprj.CameraPreview.surfaceCreated(CameraPreview.java:86)
11-24 11:17:57.685: E/AndroidRuntime(2494):     at android.view.SurfaceView.updateWindow(SurfaceView.java:571)
11-24 11:17:57.685: E/AndroidRuntime(2494):     at android.view.SurfaceView.access$000(SurfaceView.java:86)
11-24 11:17:57.685: E/AndroidRuntime(2494):     at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:175)
11-24 11:17:57.685: E/AndroidRuntime(2494):     at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:833)
11-24 11:17:57.685: E/AndroidRuntime(2494):     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1860)
11-24 11:17:57.685: E/AndroidRuntime(2494):     at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004)
11-24 11:17:57.685: E/AndroidRuntime(2494):     at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5481)
11-24 11:17:57.685: E/AndroidRuntime(2494):     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)

在 Android 2.2 上，它在初始化阶段失败：Error loading RS jni library: java.lang.UnsatisfiedLinkError: Library RSSupport not found

11-24 11:45:45.329: E/AndroidRuntime(2048): FATAL EXCEPTION: main
11-24 11:45:45.329: E/AndroidRuntime(2048): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.lag.appprj/com.lag.appprj.CaptureActivity}: android.support.v8.renderscript.RSRuntimeException: Error loading RS jni library: java.lang.UnsatisfiedLinkError: Library RSSupport not found
11-24 11:45:45.329: E/AndroidRuntime(2048):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at android.os.Handler.dispatchMessage(Handler.java:99)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at android.os.Looper.loop(Looper.java:123)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at android.app.ActivityThread.main(ActivityThread.java:4627)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at java.lang.reflect.Method.invokeNative(Native Method)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at java.lang.reflect.Method.invoke(Method.java:521)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at dalvik.system.NativeStart.main(Native Method)
11-24 11:45:45.329: E/AndroidRuntime(2048): Caused by: android.support.v8.renderscript.RSRuntimeException: Error loading RS jni library: java.lang.UnsatisfiedLinkError: Library RSSupport not found
11-24 11:45:45.329: E/AndroidRuntime(2048):     at android.support.v8.renderscript.RenderScript.create(RenderScript.java:945)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at android.support.v8.renderscript.RenderScript.create(RenderScript.java:982)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at android.support.v8.renderscript.RenderScript.create(RenderScript.java:968)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at com.lag.appprj.CameraPreview.<init>(CameraPreview.java:80)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at com.lag.appprj.CaptureActivity.onCreate(CaptureActivity.java:34)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-24 11:45:45.329: E/AndroidRuntime(2048):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)

感谢您的帮助

Answer 1

createPixel() 的错误是 ElementThunker.java 中的一个实际错误。它缺少 PIXEL_YUV 的案例，因此它最终返回 null 而不是适当的类型。我将在 AOSP 和未来的 SDK 版本中解决这个问题。 （补丁位于https://android-review.googlesource.com/70810）。

就库加载问题而言，我相信在您的其他 SO 问题上，您注意到您的 Application.mk 文件并未针对所有架构构建（因此未捆绑适当的共享库）。它适用于 4.3 的原因是 4.3 自动拥有 libRSSupport.so 的副本（尽管它确实不应该）。较旧的设备显然没有该 .so 的默认 /system/lib/ 副本，因此除非您的构建实际上将其与 apk 打包在一起，否则它们将始终无法加载它。