subprojects/gst-examples/vulkan/android/src/org/freedesktop/gstreamer/vulkan/Vulkan1.java

   1 package org.freedesktop.gstreamer.vulkan;
   2
   3 import android.app.Activity;
   4 import android.os.Bundle;
   5 import android.util.Log;
   6 import android.view.SurfaceHolder;
   7 import android.view.SurfaceView;
   8 import android.view.View;
   9 import android.view.View.OnClickListener;
  10 import android.widget.ImageButton;
  11 import android.widget.TextView;
  12 import android.widget.Toast;
  13
  14 import org.freedesktop.gstreamer.GStreamer;
  15 import org.freedesktop.gstreamer.vulkan.vulkan_1.R;
  16
  17 public class Vulkan1 extends Activity implements SurfaceHolder.Callback {
  18     private native void nativeInit();     // Initialize native code, build pipeline, etc
  19     private native void nativeFinalize(); // Destroy pipeline and shutdown native code
  20     private native void nativePlay();     // Set pipeline to PLAYING
  21     private native void nativePause();    // Set pipeline to PAUSED
  22     private static native boolean nativeClassInit(); // Initialize native class: cache Method IDs for callbacks
  23     private native void nativeSurfaceInit(Object surface);
  24     private native void nativeSurfaceFinalize();
  25     private long native_custom_data;      // Native code will use this to keep private data
  26
  27     private boolean is_playing_desired;   // Whether the user asked to go to PLAYING
  28
  29     // Called when the activity is first created.
  30     @Override
  31     public void onCreate(Bundle savedInstanceState)
  32     {
  33         super.onCreate(savedInstanceState);
  34
  35         // Initialize GStreamer and warn if it fails
  36         try {
  37             GStreamer.init(this);
  38         } catch (Exception e) {
  39             Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
  40             finish();
  41             return;
  42         }
  43
  44         setContentView(R.layout.main);
  45
  46         ImageButton play = (ImageButton) this.findViewById(R.id.button_play);
  47         play.setOnClickListener(new OnClickListener() {
  48             public void onClick(View v) {
  49                 is_playing_desired = true;
  50                 nativePlay();
  51             }
  52         });
  53
  54         ImageButton pause = (ImageButton) this.findViewById(R.id.button_stop);
  55         pause.setOnClickListener(new OnClickListener() {
  56             public void onClick(View v) {
  57                 is_playing_desired = false;
  58                 nativePause();
  59             }
  60         });
  61
  62         SurfaceView sv = (SurfaceView) this.findViewById(R.id.surface_video);
  63         SurfaceHolder sh = sv.getHolder();
  64         sh.addCallback(this);
  65
  66         if (savedInstanceState != null) {
  67             is_playing_desired = savedInstanceState.getBoolean("playing");
  68             Log.i ("GStreamer", "Activity created. Saved state is playing:" + is_playing_desired);
  69         } else {
  70             is_playing_desired = false;
  71             Log.i ("GStreamer", "Activity created. There is no saved state, playing: false");
  72         }
  73
  74         // Start with disabled buttons, until native code is initialized
  75         this.findViewById(R.id.button_play).setEnabled(false);
  76         this.findViewById(R.id.button_stop).setEnabled(false);
  77
  78         nativeInit();
  79     }
  80
  81     protected void onSaveInstanceState (Bundle outState) {
  82         Log.d ("GStreamer", "Saving state, playing:" + is_playing_desired);
  83         outState.putBoolean("playing", is_playing_desired);
  84     }
  85
  86     protected void onDestroy() {
  87         nativeFinalize();
  88         super.onDestroy();
  89     }
  90
  91     // Called from native code. This sets the content of the TextView from the UI thread.
  92     private void setMessage(final String message) {
  93         final TextView tv = (TextView) this.findViewById(R.id.textview_message);
  94         runOnUiThread (new Runnable() {
  95           public void run() {
  96             tv.setText(message);
  97           }
  98         });
  99     }
 100
 101     // Called from native code. Native code calls this once it has created its pipeline and
 102     // the main loop is running, so it is ready to accept commands.
 103     private void onGStreamerInitialized () {
 104         Log.i ("GStreamer", "Gst initialized. Restoring state, playing:" + is_playing_desired);
 105         // Restore previous playing state
 106         if (is_playing_desired) {
 107             nativePlay();
 108         } else {
 109             nativePause();
 110         }
 111
 112         // Re-enable buttons, now that GStreamer is initialized
 113         final Activity activity = this;
 114         runOnUiThread(new Runnable() {
 115             public void run() {
 116                 activity.findViewById(R.id.button_play).setEnabled(true);
 117                 activity.findViewById(R.id.button_stop).setEnabled(true);
 118             }
 119         });
 120     }
 121
 122     static {
 123         System.loadLibrary("gstreamer_android");
 124         System.loadLibrary("vulkan-1");
 125         nativeClassInit();
 126     }
 127
 128     public void surfaceChanged(SurfaceHolder holder, int format, int width,
 129             int height) {
 130         Log.d("GStreamer", "Surface changed to format " + format + " width "
 131                 + width + " height " + height);
 132         nativeSurfaceInit (holder.getSurface());
 133     }
 134
 135     public void surfaceCreated(SurfaceHolder holder) {
 136         Log.d("GStreamer", "Surface created: " + holder.getSurface());
 137     }
 138
 139     public void surfaceDestroyed(SurfaceHolder holder) {
 140         Log.d("GStreamer", "Surface destroyed");
 141         nativeSurfaceFinalize ();
 142     }
 143
 144 }