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Code Issues 1 Projects Releases Wiki Activity

Add method to test Java UI code being called from C callbacks

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This commit is contained in:
Xavi Artigas 2012-09-10 16:10:48 +02:00
parent 66d4f1873b
commit ba4182c470
2 changed files with 32 additions and 3 deletions
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20
gst-sdk/tutorials/android-tutorial-1/jni/tutorial-1.c
View file

@ -19,6 +19,7 @@ GST_DEBUG_CATEGORY_STATIC (debug_category);
#endif
typedef struct _CustomData {
jobject app;
GstElement *pipeline;
GMainLoop *main_loop;
} CustomData;
@ -27,11 +28,12 @@ static pthread_t gst_app_thread;
static pthread_key_t current_jni_env;
static JavaVM *java_vm;
static jfieldID custom_data_field_id;
static jmethodID set_message_method_id;
/*
* Private methods
*/
static JNIEnv * gst_attach_current_thread (void) {
static JNIEnv *gst_attach_current_thread (void) {
JNIEnv *env;
JavaVMAttachArgs args;
@ -65,7 +67,13 @@ static JNIEnv *gst_get_jni_env (void) {
}
static void error_cb (GstBus *bus, GstMessage *msg, CustomData *data) {
GST_DEBUG ("Message: %s", GST_MESSAGE_TYPE_NAME (msg));
GST_DEBUG ("Message: %s", GST_MESSAGE_TYPE_NAME (msg));
JNIEnv *env = gst_get_jni_env ();
(*env)->CallVoidMethod (env, data->app, set_message_method_id, (*env)->NewStringUTF(env, GST_MESSAGE_TYPE_NAME (msg)));
if ((*env)->ExceptionCheck (env)) {
GST_ERROR ("Failed to call Java method");
(*env)->ExceptionClear (env);
}
}
static void *gst_app_function (void *userdata) {
@ -76,7 +84,7 @@ static void *gst_app_function (void *userdata) {
GST_DEBUG ("Creating pipeline in CustomData at %p", data);
data->pipeline = gst_parse_launch ("videotestsrc num-buffers=10000 ! fakesink", NULL);
data->pipeline = gst_parse_launch ("videotestsrc num-buffers=1000 ! fakesink", NULL);
/* Instruct the bus to emit signals for each received message, and connect to the interesting signals */
bus = gst_element_get_bus (data->pipeline);
@ -105,6 +113,8 @@ void gst_native_init (JNIEnv* env, jobject thiz) {
SET_CUSTOM_DATA (env, thiz, custom_data_field_id, data);
GST_DEBUG ("Created CustomData at %p", data);
pthread_create (&gst_app_thread, NULL, &gst_app_function, data);
data->app = (*env)->NewGlobalRef (env, thiz);
GST_DEBUG ("Created GlobalRef for app objet at %p", data->app);
}
void gst_native_finalize (JNIEnv* env, jobject thiz) {
@ -113,6 +123,8 @@ void gst_native_finalize (JNIEnv* env, jobject thiz) {
g_main_loop_quit (data->main_loop);
GST_DEBUG ("Waiting for thread to finish...");
pthread_join (gst_app_thread, NULL);
GST_DEBUG ("Deleting GlobalRef at %p", data->app);
(*env)->DeleteGlobalRef (env, data->app);
GST_DEBUG ("Freeing CustomData at %p", data);
g_free (data);
GST_DEBUG ("Done finalizing");
@ -133,6 +145,8 @@ void gst_native_pause (JNIEnv* env, jobject thiz) {
void gst_class_init (JNIEnv* env, jclass klass) {
custom_data_field_id = (*env)->GetFieldID (env, klass, "native_custom_data", "J");
GST_DEBUG ("The FieldID for the native_custom_data field is %p", custom_data_field_id);
set_message_method_id = (*env)->GetMethodID (env, klass, "setMessage", "(Ljava/lang/String;)V");
GST_DEBUG ("The MethodID for the setMessage method is %p", set_message_method_id);
}
static JNINativeMethod native_methods[] = {

15
gst-sdk/tutorials/android-tutorial-1/src/com/gst_sdk_tutorials/tutorial_1/Tutorial1.java
View file

@ -16,6 +16,7 @@
package com.gst_sdk_tutorials.tutorial_1;
import android.app.Activity;
import android.util.Log;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
@ -61,6 +62,20 @@ public class Tutorial1 extends Activity
super.onDestroy();
}
private void setMessage (final String message) {
final TextView tv = (TextView)this.findViewById(R.id.textview_message);
Log.d ("GStreamer", "Received message " + message);
try {
runOnUiThread (new Runnable() {@Override public void run()
{
tv.setText (message);
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
static {
System.loadLibrary("gstreamer_android");
System.loadLibrary("tutorial-1");