I downloaded the code for "android-visualizer" and I tried to get it to work, but I got the error that I pasted below. What should I to get this to work?

My company is working on an Android visualizer with OpenGL 3d effects and we would like to reuse the code from "android-visualizer" if possible.

01-02 10:06:41.282: D/dalvikvm(5376): Late-enabling CheckJNI 01-02 10:06:41.306: I/dalvikvm(5376): Turning on JNI app bug workarounds for target SDK version 9... 01-02 10:06:41.813: E/MediaPlayer(5376): Unable to to create media player 01-02 10:06:41.915: D/MediaPlayer(5376): create failed: 01-02 10:06:41.915: D/MediaPlayer(5376): java.io.IOException: setDataSourceFD failed.: status=0x80000000 01-02 10:06:41.915: D/MediaPlayer(5376): at android.media.MediaPlayer.setDataSource(Native Method) 01-02 10:06:41.915: D/MediaPlayer(5376): at android.media.MediaPlayer.create(MediaPlayer.java:740) 01-02 10:06:41.915: D/MediaPlayer(5376): at com.pheelicks.app.MainActivity.init(MainActivity.java:59) 01-02 10:06:41.915: D/MediaPlayer(5376): at com.pheelicks.app.MainActivity.onResume(MainActivity.java:39) 01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1158) 01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.Activity.performResume(Activity.java:4539) 01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2448) 01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2486) 01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2000) 01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.ActivityThread.access$600(ActivityThread.java:128) 01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1161) 01-02 10:06:41.915: D/MediaPlayer(5376): at android.os.Handler.dispatchMessage(Handler.java:99) 01-02 10:06:41.915: D/MediaPlayer(5376): at android.os.Looper.loop(Looper.java:137) 01-02 10:06:41.915: D/MediaPlayer(5376): at android.app.ActivityThread.main(ActivityThread.java:4514) 01-02 10:06:41.915: D/MediaPlayer(5376): at java.lang.reflect.Method.invokeNative(Native Method) 01-02 10:06:41.915: D/MediaPlayer(5376): at java.lang.reflect.Method.invoke(Method.java:511) 01-02 10:06:41.915: D/MediaPlayer(5376): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 01-02 10:06:41.915: D/MediaPlayer(5376): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 01-02 10:06:41.915: D/MediaPlayer(5376): at dalvik.system.NativeStart.main(Native Method) 01-02 10:06:41.915: D/AndroidRuntime(5376): Shutting down VM 01-02 10:06:41.915: W/dalvikvm(5376): threadid=1: thread exiting with uncaught exception (group=0x40bcf1f8) 01-02 10:06:41.915: E/AndroidRuntime(5376): FATAL EXCEPTION: main 01-02 10:06:41.915: E/AndroidRuntime(5376): java.lang.RuntimeException: Unable to resume activity {com.pheelicks.visualizer/com.pheelicks.app.MainActivity}: java.lang.NullPointerException 01-02 10:06:41.915: E/AndroidRuntime(5376): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2458) 01-02 10:06:41.915: E/AndroidRuntime(5376): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2486) 01-02 10:06:41.915: E/AndroidRuntime(5376): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2000) 01-02 10:06:41.915: E/AndroidRuntime(5376): at android.app.ActivityThread.access$600(ActivityThread.java:128) 01-02 10:06:41.915: E/AndroidRuntime(5376): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1161) 01-02 10:06:41.915: E/AndroidRuntime(5376): at android.os.Handler.dispatchMessage(Handler.java:99) 01-02 10:06:41.915: E/AndroidRuntime(5376): at android.os.Looper.loop(Looper.java:137) 01-02 10:06:41.915: E/AndroidRuntime(5376): at android.app.ActivityThread.main(ActivityThread.java:4514) 01-02 10:06:41.915: E/AndroidRuntime(5376): at java.lang.reflect.Method.invokeNative(Native Method) 01-02 10:06:41.915: E/AndroidRuntime(5376): at java.lang.reflect.Method.invoke(Method.java:511) 01-02 10:06:41.915: E/AndroidRuntime(5376): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790) 01-02 10:06:41.915: E/AndroidRuntime(5376): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557) 01-02 10:06:41.915: E/AndroidRuntime(5376): at dalvik.system.NativeStart.main(Native Method) 01-02 10:06:41.915: E/AndroidRuntime(5376): Caused by: java.lang.NullPointerException 01-02 10:06:41.915: E/AndroidRuntime(5376): at com.pheelicks.app.MainActivity.init(MainActivity.java:60) 01-02 10:06:41.915: E/AndroidRuntime(5376): at com.pheelicks.app.MainActivity.onResume(MainActivity.java:39) 01-02 10:06:41.915: E/AndroidRuntime(5376): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1158) 01-02 10:06:41.915: E/AndroidRuntime(5376): at android.app.Activity.performResume(Activity.java:4539) 01-02 10:06:41.915: E/AndroidRuntime(5376): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2448) 01-02 10:06:41.915: E/AndroidRuntime(5376): ... 12 more

hey guys, Can anybody please tell me how can i change color of every bar or group of bar into bargraphrender method? I am new to android i dont know much about canvas and rendering. please can you help me to change color of each bar in bar visualizer. like this

The Visualizer documentation says that the returned bytes in getFFT() are unsigned 8-bit numbers. Shouldn't rfk and ifk be converted to positive Java integers before using them like this, or am I missing something?

int rfk = data.bytes[mDivisions * i] & 0xff;
int ifk = data.bytes[mDivisions * i + 1] & 0xff;

headline says all.

Cheers!

Rainer

This error log:

04-20 18:38:53.406  9750 21279 E         : Request requires android.permission.MODIFY_AUDIO_SETTINGS
04-20 18:38:53.406 24553 24553 E AudioEffect: set(): AudioFlinger could not create effect, status: -1
04-20 18:38:53.406 24553 24553 E visualizers-JNI: Visualizer initCheck failed -3
04-20 18:38:53.406 24553 24553 E Visualizer-JAVA: Error code -3 when initializing Visualizer.
04-20 18:38:53.407 24553 24553 D AndroidRuntime: Shutting down VM
04-20 18:38:53.409 24553 24553 E AndroidRuntime: FATAL EXCEPTION: main
04-20 18:38:53.409 24553 24553 E AndroidRuntime: Process: de.appwerft.hoerdat, PID: 24553
04-20 18:38:53.409 24553 24553 E AndroidRuntime: java.lang.RuntimeException: Cannot initialize Visualizer engine, error: -3

This permission is in manifest: android.permission.MODIFY_AUDIO_SETTINGS

Had some time and I just did some audio/visual multithreading stuff in a private project, so I wanted to give yours a big performance boost.

The basis of it is sharing sound frames (the captured samples) via a threadsafe queue, in this case a LIFO stack called a "Deque".

The sound sampler runs as a repeating handler and produces frames for the stack. The graphics thread is standard for a surfaceView, and consumes frames from the stack.

Runs yah, about 10 times faster and it is very smooth. Also since the sound sampling is constant the waveform is much more defined and not jerking all over the place.

Tweaked the UI to make the buttons a little bigger. Tweaked the Line and Bar renderer a bit. Added a frames/second counter

I have a test.mp3 that contains pure tones for calibration activities. Can't upload it via the web interface, but your existing test file should be fine.

You could further improve this by adding some openGL shaders instead of drawing with canvas. Right now it rocks compared to the previous synchronized version.

This commit fixes the issue; "Visualization does not work on the new Galaxy devices" https://github.com/felixpalmer/android-visualizer/issues/5

Original workaround demonstration code: https://github.com/h6ah4i/tunnel_player_workaround)

Hi Felix, as reported you lib runs now as Titanium module.

Problem: on NEXU5 and NEXUS6P it only works if the audio signal goes to bluetooth or headphone. If I use the loudspeaker, then I see flatline. I'm using audioSessioID 0.

Edit: if I plugg in the headset in NEXUS5 then it works, if I now plugg out the visualisation keeps, on NEXUS6P after outplugging the visualtion disappears

Cheers!

I have released my music visualizer app "Astral 3d worlds", which is inspired by your open source project. I can send you the paid version for free if you want to see how it looks like. This is not an issue and you can close it anytime. I didn't find your mail, so that is why I contacted you this way.

Your project is mentioned in the product page on Google play:

https://play.google.com/store/apps/details?id=astral.worldsf&feature=search_result#?t=W251bGwsMSwxLDEsImFzdHJhbC53b3JsZHNmIl0.

There seems to be audio issues with Android 9. It could also be that the audio playing model has been changed in Android 9, but I can not find any information about this. The only audio related change seems to be "HD Audio: Improved performance and support for HD audio delivering clearer, sharper, and richer quality sound."

It is not only our apps that have issues with Android 9. I tested all the 10 top rated music visualizers. 40% of them have audio issues on Android 9, which makes the audio playing or the visualization not work anymore. I tested the same apps on a device with Android 8, where none of these problems appeared. This will cause big problems for the customers, when 40% of their music visualizer apps no longer work. Here are descriptions and stacktraces of the errors:

1. Visualizer data capture issue signal 11 (SIGSEGV), code 1 (SEGV_MAPERR) android::RefBase::incStrong(void const*) const backtrace: #00 pc 000000000000bc30 /system/lib64/libutils.so (android::RefBase::incStrong(void const*) const) #01 pc 000000000000f7a8 /system/lib64/libutils.so (android::Thread::run(char const*, int, unsigned long)+124) #02 pc 00000000000bd028 /system/lib64/libmedia.so (android::Visualizer::periodicCapture()+224) #03 pc 00000000000bcdd8 /system/lib64/libmedia.so (android::Visualizer::CaptureThread::threadLoop()+88) #04 pc 000000000000f9d4 /system/lib64/libutils.so (android::Thread::_threadLoop(void*)+280) #05 pc 00000000000bc9cc /system/lib64/libandroid_runtime.so (android::AndroidRuntime::javaThreadShell(void*)+140) #06 pc 0000000000083840 /system/lib64/libc.so (__pthread_start(void*)+36) #07 pc 0000000000023d80 /system/lib64/libc.so (__start_thread+68)

I have debugged and researched and found that setDataCaptureListener in Visualizer causes this problem. This is probably not a driver problem, since I see on the Play console that it happens on both Samsung and Motorola.

2. Radio streaming no longer starts E/MediaPlayerNative: error (1, -2147483646) E/MediaPlayer: Error (1,-2147483648) E/ContentValues: onError
   The '1' value corresponds to the constant in MediaPlayer.MEDIA_ERROR_UNKNOWN. -2147483648 corresponds to hexadecimal 0x80000000 which is defined as UNKNOWN_ERROR in frameworks/native/include/utils/Errors.h. This shows that the error's source is hard to pin down as it is quite a generic return value, thrown by codec and compatibility issues, but also thread cancellations and several other types.

Fatal Exception: java.lang.RuntimeException: Cannot initialize Visualizer engine, error: -3 at android.media.audiofx.Visualizer.(Visualizer.java) at com.myApplication.android_visualizer.visualizer.VisualizerView.link(VisualizerView.java:85) at com.myApplication.activities.RadioStationActivity.initVisualizer(RadioStationActivity.java:633) at com.myApplication.activities.RadioStationActivity.checkPermissionsAndStartVisualization(RadioStationActivity.java:537) at com.myApplication.activities.RadioStationActivity.onPlayingStarted(RadioStationActivity.java:525) at com.myApplication.services.RadioService.onPrepared(RadioService.java:197) at io.vov.vitamio.MediaPlayer$EventHandler.handleMessage(MediaPlayer.java:1704) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6692) at java.lang.reflect.Method.invoke(Method.java) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)

Some time application get crash with this log

My apps already visualize music from external and internal music players. I want to add live microphone sync, so my apps also visualize sound from the microphone. How can I implement that? I found no info about this on https://developer.android.com/reference/android/media/audiofx/Visualizer.html

I have some issues with the visualizer. The app draws a thin line in the middle of the canvas (about 5 pixels high) and draws the visualization into that. You cannot see it with the eyes. I had to zoom in to ensure it works. Is there someworkaounr for this?